[PATCH v2] ARM: dts: aspeed: cmm: fixup i2c tree

Joel Stanley joel at jms.id.au
Fri Jul 24 15:32:10 AEST 2020


On Thu, 23 Jul 2020 at 23:08, <rentao.bupt at gmail.com> wrote:
>
> From: Tao Ren <rentao.bupt at gmail.com>
>
> Create all the i2c switches in device tree and use aliases to assign
> child channels with consistent bus numbers.
>
> Besides, "i2c-mux-idle-disconnect" is set for all the i2c switches to
> avoid potential conflicts when multiple devices (beind the switches)
> use the same device address.
>
> Signed-off-by: Tao Ren <rentao.bupt at gmail.com>

Reviewed-by: Joel Stanley <joel at jms.id.au>

I have merged this patch into the aspeed dt-for-5.9 branch.

Cheers,

Joel

> ---
>  Changes in v2:
>    - Nothing changed. Resending the patch just in case the previous
>      email was not delivered.
>
>  arch/arm/boot/dts/aspeed-bmc-facebook-cmm.dts | 1231 ++++++++++++++++-
>  1 file changed, 1228 insertions(+), 3 deletions(-)
>
> diff --git a/arch/arm/boot/dts/aspeed-bmc-facebook-cmm.dts b/arch/arm/boot/dts/aspeed-bmc-facebook-cmm.dts
> index 016bbcb99bb6..7bc7df7ed428 100644
> --- a/arch/arm/boot/dts/aspeed-bmc-facebook-cmm.dts
> +++ b/arch/arm/boot/dts/aspeed-bmc-facebook-cmm.dts
> @@ -19,8 +19,8 @@
>                 serial3 = &uart4;
>
>                 /*
> -                * Hardcode the bus number of i2c switches' channels to
> -                * avoid breaking the legacy applications.
> +                * PCA9548 (1-0077) provides 8 channels for connecting to
> +                * 4 Line Cards and 4 Fabric Cards.
>                  */
>                 i2c16 = &imux16;
>                 i2c17 = &imux17;
> @@ -30,6 +30,11 @@
>                 i2c21 = &imux21;
>                 i2c22 = &imux22;
>                 i2c23 = &imux23;
> +
> +               /*
> +                * PCA9548 (2-0071) provides 8 channels for connecting to
> +                * Power Distribution Board.
> +                */
>                 i2c24 = &imux24;
>                 i2c25 = &imux25;
>                 i2c26 = &imux26;
> @@ -38,6 +43,11 @@
>                 i2c29 = &imux29;
>                 i2c30 = &imux30;
>                 i2c31 = &imux31;
> +
> +               /*
> +                * PCA9548 (8-0077) provides 8 channels and the first 4
> +                * channels are connecting to 4 Fan Control Boards.
> +                */
>                 i2c32 = &imux32;
>                 i2c33 = &imux33;
>                 i2c34 = &imux34;
> @@ -46,6 +56,226 @@
>                 i2c37 = &imux37;
>                 i2c38 = &imux38;
>                 i2c39 = &imux39;
> +
> +               /*
> +                * 2 PCA9548 (18-0070 & 18-0073), 16 channels connecting
> +                * to Line Card #1.
> +                */
> +               i2c40 = &imux40;
> +               i2c41 = &imux41;
> +               i2c42 = &imux42;
> +               i2c43 = &imux43;
> +               i2c44 = &imux44;
> +               i2c45 = &imux45;
> +               i2c46 = &imux46;
> +               i2c47 = &imux47;
> +               i2c48 = &imux48;
> +               i2c49 = &imux49;
> +               i2c50 = &imux50;
> +               i2c51 = &imux51;
> +               i2c52 = &imux52;
> +               i2c53 = &imux53;
> +               i2c54 = &imux54;
> +               i2c55 = &imux55;
> +
> +               /*
> +                * 2 PCA9548 (19-0070 & 19-0073), 16 channels connecting
> +                * to Line Card #2.
> +                */
> +               i2c56 = &imux56;
> +               i2c57 = &imux57;
> +               i2c58 = &imux58;
> +               i2c59 = &imux59;
> +               i2c60 = &imux60;
> +               i2c61 = &imux61;
> +               i2c62 = &imux62;
> +               i2c63 = &imux63;
> +               i2c64 = &imux64;
> +               i2c65 = &imux65;
> +               i2c66 = &imux66;
> +               i2c67 = &imux67;
> +               i2c68 = &imux68;
> +               i2c69 = &imux69;
> +               i2c70 = &imux70;
> +               i2c71 = &imux71;
> +
> +               /*
> +                * 2 PCA9548 (20-0070 & 20-0073), 16 channels connecting
> +                * to Line Card #3.
> +                */
> +               i2c72 = &imux72;
> +               i2c73 = &imux73;
> +               i2c74 = &imux74;
> +               i2c75 = &imux75;
> +               i2c76 = &imux76;
> +               i2c77 = &imux77;
> +               i2c78 = &imux78;
> +               i2c79 = &imux79;
> +               i2c80 = &imux80;
> +               i2c81 = &imux81;
> +               i2c82 = &imux82;
> +               i2c83 = &imux83;
> +               i2c84 = &imux84;
> +               i2c85 = &imux85;
> +               i2c86 = &imux86;
> +               i2c87 = &imux87;
> +
> +               /*
> +                * 2 PCA9548 (21-0070 & 21-0073), 16 channels connecting
> +                * to Line Card #4.
> +                */
> +               i2c88 = &imux88;
> +               i2c89 = &imux89;
> +               i2c90 = &imux90;
> +               i2c91 = &imux91;
> +               i2c92 = &imux92;
> +               i2c93 = &imux93;
> +               i2c94 = &imux94;
> +               i2c95 = &imux95;
> +               i2c96 = &imux96;
> +               i2c97 = &imux97;
> +               i2c98 = &imux98;
> +               i2c99 = &imux99;
> +               i2c100 = &imux100;
> +               i2c101 = &imux101;
> +               i2c102 = &imux102;
> +               i2c103 = &imux103;
> +
> +               /*
> +                * 2 PCA9548 (16-0070 & 16-0073), 16 channels connecting
> +                * to Fabric Card #1.
> +                */
> +               i2c104 = &imux104;
> +               i2c105 = &imux105;
> +               i2c106 = &imux106;
> +               i2c107 = &imux107;
> +               i2c108 = &imux108;
> +               i2c109 = &imux109;
> +               i2c110 = &imux110;
> +               i2c111 = &imux111;
> +               i2c112 = &imux112;
> +               i2c113 = &imux113;
> +               i2c114 = &imux114;
> +               i2c115 = &imux115;
> +               i2c116 = &imux116;
> +               i2c117 = &imux117;
> +               i2c118 = &imux118;
> +               i2c119 = &imux119;
> +
> +               /*
> +                * 2 PCA9548 (17-0070 & 17-0073), 16 channels connecting
> +                * to Fabric Card #2.
> +                */
> +               i2c120 = &imux120;
> +               i2c121 = &imux121;
> +               i2c122 = &imux122;
> +               i2c123 = &imux123;
> +               i2c124 = &imux124;
> +               i2c125 = &imux125;
> +               i2c126 = &imux126;
> +               i2c127 = &imux127;
> +               i2c128 = &imux128;
> +               i2c129 = &imux129;
> +               i2c130 = &imux130;
> +               i2c131 = &imux131;
> +               i2c132 = &imux132;
> +               i2c133 = &imux133;
> +               i2c134 = &imux134;
> +               i2c135 = &imux135;
> +
> +               /*
> +                * 2 PCA9548 (22-0070 & 22-0073), 16 channels connecting
> +                * to Fabric Card #3.
> +                */
> +               i2c136 = &imux136;
> +               i2c137 = &imux137;
> +               i2c138 = &imux138;
> +               i2c139 = &imux139;
> +               i2c140 = &imux140;
> +               i2c141 = &imux141;
> +               i2c142 = &imux142;
> +               i2c143 = &imux143;
> +               i2c144 = &imux144;
> +               i2c145 = &imux145;
> +               i2c146 = &imux146;
> +               i2c147 = &imux147;
> +               i2c148 = &imux148;
> +               i2c149 = &imux149;
> +               i2c150 = &imux150;
> +               i2c151 = &imux151;
> +
> +               /*
> +                * 2 PCA9548 (23-0070 & 23-0073), 16 channels connecting
> +                * to Fabric Card #4.
> +                */
> +               i2c152 = &imux152;
> +               i2c153 = &imux153;
> +               i2c154 = &imux154;
> +               i2c155 = &imux155;
> +               i2c156 = &imux156;
> +               i2c157 = &imux157;
> +               i2c158 = &imux158;
> +               i2c159 = &imux159;
> +               i2c160 = &imux160;
> +               i2c161 = &imux161;
> +               i2c162 = &imux162;
> +               i2c163 = &imux163;
> +               i2c164 = &imux164;
> +               i2c165 = &imux165;
> +               i2c166 = &imux166;
> +               i2c167 = &imux167;
> +
> +               /*
> +                * PCA9548 (32-0070), 8 channels connecting to Fan Control
> +                # Board #1.
> +                */
> +               i2c168 = &imux168;
> +               i2c169 = &imux169;
> +               i2c170 = &imux170;
> +               i2c171 = &imux171;
> +               i2c172 = &imux172;
> +               i2c173 = &imux173;
> +               i2c174 = &imux174;
> +               i2c175 = &imux175;
> +
> +               /*
> +                * PCA9548 (33-0070), 8 channels connecting to Fan Control
> +                # Board #2.
> +                */
> +               i2c176 = &imux176;
> +               i2c177 = &imux177;
> +               i2c178 = &imux178;
> +               i2c179 = &imux179;
> +               i2c180 = &imux180;
> +               i2c181 = &imux181;
> +               i2c182 = &imux182;
> +               i2c183 = &imux183;
> +
> +               /*
> +                * PCA9548 (34-0070), 8 channels connecting to Fan Control
> +                # Board #3.
> +                */
> +               i2c184 = &imux184;
> +               i2c185 = &imux185;
> +               i2c186 = &imux186;
> +               i2c187 = &imux187;
> +               i2c188 = &imux188;
> +               i2c189 = &imux189;
> +               i2c190 = &imux190;
> +               i2c191 = &imux191;
> +
> +               /*
> +                * PCA9548 (35-0070), 8 channels connecting to Fan Control
> +                # Board #4.
> +                */
> +               i2c192 = &imux192;
> +               i2c193 = &imux193;
> +               i2c194 = &imux194;
> +               i2c195 = &imux195;
> +               i2c196 = &imux196;
> +               i2c197 = &imux197;
> +               i2c198 = &imux198;
> +               i2c199 = &imux199;
>         };
>
>         chosen {
> @@ -103,53 +333,846 @@
>                 #address-cells = <1>;
>                 #size-cells = <0>;
>                 reg = <0x77>;
> +               i2c-mux-idle-disconnect;
>
> +               /* To Fabric Card #1 */
>                 imux16: i2c at 0 {
>                         #address-cells = <1>;
>                         #size-cells = <0>;
>                         reg = <0>;
> +
> +                       i2c-switch at 70 {
> +                               compatible = "nxp,pca9548";
> +                               #address-cells = <1>;
> +                               #size-cells = <0>;
> +                               reg = <0x70>;
> +                               i2c-mux-idle-disconnect;
> +
> +                               imux104: i2c at 0 {
> +                                       #address-cells = <1>;
> +                                       #size-cells = <0>;
> +                                       reg = <0>;
> +                               };
> +                               imux105: i2c at 1 {
> +                                       #address-cells = <1>;
> +                                       #size-cells = <0>;
> +                                       reg = <1>;
> +                               };
> +                               imux106: i2c at 2 {
> +                                       #address-cells = <1>;
> +                                       #size-cells = <0>;
> +                                       reg = <2>;
> +                               };
> +                               imux107: i2c at 3 {
> +                                       #address-cells = <1>;
> +                                       #size-cells = <0>;
> +                                       reg = <3>;
> +                               };
> +                               imux108: i2c at 4 {
> +                                       #address-cells = <1>;
> +                                       #size-cells = <0>;
> +                                       reg = <4>;
> +                               };
> +                               imux109: i2c at 5 {
> +                                       #address-cells = <1>;
> +                                       #size-cells = <0>;
> +                                       reg = <5>;
> +                               };
> +                               imux110: i2c at 6 {
> +                                       #address-cells = <1>;
> +                                       #size-cells = <0>;
> +                                       reg = <6>;
> +                               };
> +                               imux111: i2c at 7 {
> +                                       #address-cells = <1>;
> +                                       #size-cells = <0>;
> +                                       reg = <7>;
> +                               };
> +                       };
> +
> +                       i2c-switch at 73 {
> +                               compatible = "nxp,pca9548";
> +                               #address-cells = <1>;
> +                               #size-cells = <0>;
> +                               reg = <0x73>;
> +                               i2c-mux-idle-disconnect;
> +
> +                               imux112: i2c at 0 {
> +                                       #address-cells = <1>;
> +                                       #size-cells = <0>;
> +                                       reg = <0>;
> +                               };
> +                               imux113: i2c at 1 {
> +                                       #address-cells = <1>;
> +                                       #size-cells = <0>;
> +                                       reg = <1>;
> +                               };
> +                               imux114: i2c at 2 {
> +                                       #address-cells = <1>;
> +                                       #size-cells = <0>;
> +                                       reg = <2>;
> +                               };
> +                               imux115: i2c at 3 {
> +                                       #address-cells = <1>;
> +                                       #size-cells = <0>;
> +                                       reg = <3>;
> +                               };
> +                               imux116: i2c at 4 {
> +                                       #address-cells = <1>;
> +                                       #size-cells = <0>;
> +                                       reg = <4>;
> +                               };
> +                               imux117: i2c at 5 {
> +                                       #address-cells = <1>;
> +                                       #size-cells = <0>;
> +                                       reg = <5>;
> +                               };
> +                               imux118: i2c at 6 {
> +                                       #address-cells = <1>;
> +                                       #size-cells = <0>;
> +                                       reg = <6>;
> +                               };
> +                               imux119: i2c at 7 {
> +                                       #address-cells = <1>;
> +                                       #size-cells = <0>;
> +                                       reg = <7>;
> +                               };
> +                       };
>                 };
>
> +               /* To Fabric Card #2 */
>                 imux17: i2c at 1 {
>                         #address-cells = <1>;
>                         #size-cells = <0>;
>                         reg = <1>;
> +
> +                       i2c-switch at 70 {
> +                               compatible = "nxp,pca9548";
> +                               #address-cells = <1>;
> +                               #size-cells = <0>;
> +                               reg = <0x70>;
> +                               i2c-mux-idle-disconnect;
> +
> +                               imux120: i2c at 0 {
> +                                       #address-cells = <1>;
> +                                       #size-cells = <0>;
> +                                       reg = <0>;
> +                               };
> +                               imux121: i2c at 1 {
> +                                       #address-cells = <1>;
> +                                       #size-cells = <0>;
> +                                       reg = <1>;
> +                               };
> +                               imux122: i2c at 2 {
> +                                       #address-cells = <1>;
> +                                       #size-cells = <0>;
> +                                       reg = <2>;
> +                               };
> +                               imux123: i2c at 3 {
> +                                       #address-cells = <1>;
> +                                       #size-cells = <0>;
> +                                       reg = <3>;
> +                               };
> +                               imux124: i2c at 4 {
> +                                       #address-cells = <1>;
> +                                       #size-cells = <0>;
> +                                       reg = <4>;
> +                               };
> +                               imux125: i2c at 5 {
> +                                       #address-cells = <1>;
> +                                       #size-cells = <0>;
> +                                       reg = <5>;
> +                               };
> +                               imux126: i2c at 6 {
> +                                       #address-cells = <1>;
> +                                       #size-cells = <0>;
> +                                       reg = <6>;
> +                               };
> +                               imux127: i2c at 7 {
> +                                       #address-cells = <1>;
> +                                       #size-cells = <0>;
> +                                       reg = <7>;
> +                               };
> +                       };
> +
> +                       i2c-switch at 73 {
> +                               compatible = "nxp,pca9548";
> +                               #address-cells = <1>;
> +                               #size-cells = <0>;
> +                               reg = <0x73>;
> +                               i2c-mux-idle-disconnect;
> +
> +                               imux128: i2c at 0 {
> +                                       #address-cells = <1>;
> +                                       #size-cells = <0>;
> +                                       reg = <0>;
> +                               };
> +                               imux129: i2c at 1 {
> +                                       #address-cells = <1>;
> +                                       #size-cells = <0>;
> +                                       reg = <1>;
> +                               };
> +                               imux130: i2c at 2 {
> +                                       #address-cells = <1>;
> +                                       #size-cells = <0>;
> +                                       reg = <2>;
> +                               };
> +                               imux131: i2c at 3 {
> +                                       #address-cells = <1>;
> +                                       #size-cells = <0>;
> +                                       reg = <3>;
> +                               };
> +                               imux132: i2c at 4 {
> +                                       #address-cells = <1>;
> +                                       #size-cells = <0>;
> +                                       reg = <4>;
> +                               };
> +                               imux133: i2c at 5 {
> +                                       #address-cells = <1>;
> +                                       #size-cells = <0>;
> +                                       reg = <5>;
> +                               };
> +                               imux134: i2c at 6 {
> +                                       #address-cells = <1>;
> +                                       #size-cells = <0>;
> +                                       reg = <6>;
> +                               };
> +                               imux135: i2c at 7 {
> +                                       #address-cells = <1>;
> +                                       #size-cells = <0>;
> +                                       reg = <7>;
> +                               };
> +                       };
>                 };
>
> +               /* To Line Card #1 */
>                 imux18: i2c at 2 {
>                         #address-cells = <1>;
>                         #size-cells = <0>;
>                         reg = <2>;
> +
> +                       i2c-switch at 70 {
> +                               compatible = "nxp,pca9548";
> +                               #address-cells = <1>;
> +                               #size-cells = <0>;
> +                               reg = <0x70>;
> +                               i2c-mux-idle-disconnect;
> +
> +                               imux40: i2c at 0 {
> +                                       #address-cells = <1>;
> +                                       #size-cells = <0>;
> +                                       reg = <0>;
> +                               };
> +                               imux41: i2c at 1 {
> +                                       #address-cells = <1>;
> +                                       #size-cells = <0>;
> +                                       reg = <1>;
> +                               };
> +                               imux42: i2c at 2 {
> +                                       #address-cells = <1>;
> +                                       #size-cells = <0>;
> +                                       reg = <2>;
> +                               };
> +                               imux43: i2c at 3 {
> +                                       #address-cells = <1>;
> +                                       #size-cells = <0>;
> +                                       reg = <3>;
> +                               };
> +                               imux44: i2c at 4 {
> +                                       #address-cells = <1>;
> +                                       #size-cells = <0>;
> +                                       reg = <4>;
> +                               };
> +                               imux45: i2c at 5 {
> +                                       #address-cells = <1>;
> +                                       #size-cells = <0>;
> +                                       reg = <5>;
> +                               };
> +                               imux46: i2c at 6 {
> +                                       #address-cells = <1>;
> +                                       #size-cells = <0>;
> +                                       reg = <6>;
> +                               };
> +                               imux47: i2c at 7 {
> +                                       #address-cells = <1>;
> +                                       #size-cells = <0>;
> +                                       reg = <7>;
> +                               };
> +                       };
> +
> +                       i2c-switch at 73 {
> +                               compatible = "nxp,pca9548";
> +                               #address-cells = <1>;
> +                               #size-cells = <0>;
> +                               reg = <0x73>;
> +                               i2c-mux-idle-disconnect;
> +
> +                               imux48: i2c at 0 {
> +                                       #address-cells = <1>;
> +                                       #size-cells = <0>;
> +                                       reg = <0>;
> +                               };
> +                               imux49: i2c at 1 {
> +                                       #address-cells = <1>;
> +                                       #size-cells = <0>;
> +                                       reg = <1>;
> +                               };
> +                               imux50: i2c at 2 {
> +                                       #address-cells = <1>;
> +                                       #size-cells = <0>;
> +                                       reg = <2>;
> +                               };
> +                               imux51: i2c at 3 {
> +                                       #address-cells = <1>;
> +                                       #size-cells = <0>;
> +                                       reg = <3>;
> +                               };
> +                               imux52: i2c at 4 {
> +                                       #address-cells = <1>;
> +                                       #size-cells = <0>;
> +                                       reg = <4>;
> +                               };
> +                               imux53: i2c at 5 {
> +                                       #address-cells = <1>;
> +                                       #size-cells = <0>;
> +                                       reg = <5>;
> +                               };
> +                               imux54: i2c at 6 {
> +                                       #address-cells = <1>;
> +                                       #size-cells = <0>;
> +                                       reg = <6>;
> +                               };
> +                               imux55: i2c at 7 {
> +                                       #address-cells = <1>;
> +                                       #size-cells = <0>;
> +                                       reg = <7>;
> +                               };
> +                       };
>                 };
>
> +               /* To Line Card #2 */
>                 imux19: i2c at 3 {
>                         #address-cells = <1>;
>                         #size-cells = <0>;
>                         reg = <3>;
> +
> +                       i2c-switch at 70 {
> +                               compatible = "nxp,pca9548";
> +                               #address-cells = <1>;
> +                               #size-cells = <0>;
> +                               reg = <0x70>;
> +                               i2c-mux-idle-disconnect;
> +
> +                               imux56: i2c at 0 {
> +                                       #address-cells = <1>;
> +                                       #size-cells = <0>;
> +                                       reg = <0>;
> +                               };
> +                               imux57: i2c at 1 {
> +                                       #address-cells = <1>;
> +                                       #size-cells = <0>;
> +                                       reg = <1>;
> +                               };
> +                               imux58: i2c at 2 {
> +                                       #address-cells = <1>;
> +                                       #size-cells = <0>;
> +                                       reg = <2>;
> +                               };
> +                               imux59: i2c at 3 {
> +                                       #address-cells = <1>;
> +                                       #size-cells = <0>;
> +                                       reg = <3>;
> +                               };
> +                               imux60: i2c at 4 {
> +                                       #address-cells = <1>;
> +                                       #size-cells = <0>;
> +                                       reg = <4>;
> +                               };
> +                               imux61: i2c at 5 {
> +                                       #address-cells = <1>;
> +                                       #size-cells = <0>;
> +                                       reg = <5>;
> +                               };
> +                               imux62: i2c at 6 {
> +                                       #address-cells = <1>;
> +                                       #size-cells = <0>;
> +                                       reg = <6>;
> +                               };
> +                               imux63: i2c at 7 {
> +                                       #address-cells = <1>;
> +                                       #size-cells = <0>;
> +                                       reg = <7>;
> +                               };
> +                       };
> +
> +                       i2c-switch at 73 {
> +                               compatible = "nxp,pca9548";
> +                               #address-cells = <1>;
> +                               #size-cells = <0>;
> +                               reg = <0x73>;
> +                               i2c-mux-idle-disconnect;
> +
> +                               imux64: i2c at 0 {
> +                                       #address-cells = <1>;
> +                                       #size-cells = <0>;
> +                                       reg = <0>;
> +                               };
> +                               imux65: i2c at 1 {
> +                                       #address-cells = <1>;
> +                                       #size-cells = <0>;
> +                                       reg = <1>;
> +                               };
> +                               imux66: i2c at 2 {
> +                                       #address-cells = <1>;
> +                                       #size-cells = <0>;
> +                                       reg = <2>;
> +                               };
> +                               imux67: i2c at 3 {
> +                                       #address-cells = <1>;
> +                                       #size-cells = <0>;
> +                                       reg = <3>;
> +                               };
> +                               imux68: i2c at 4 {
> +                                       #address-cells = <1>;
> +                                       #size-cells = <0>;
> +                                       reg = <4>;
> +                               };
> +                               imux69: i2c at 5 {
> +                                       #address-cells = <1>;
> +                                       #size-cells = <0>;
> +                                       reg = <5>;
> +                               };
> +                               imux70: i2c at 6 {
> +                                       #address-cells = <1>;
> +                                       #size-cells = <0>;
> +                                       reg = <6>;
> +                               };
> +                               imux71: i2c at 7 {
> +                                       #address-cells = <1>;
> +                                       #size-cells = <0>;
> +                                       reg = <7>;
> +                               };
> +                       };
>                 };
>
> +               /* To LC3 SCM */
>                 imux20: i2c at 4 {
>                         #address-cells = <1>;
>                         #size-cells = <0>;
>                         reg = <4>;
> +
> +                       i2c-switch at 70 {
> +                               compatible = "nxp,pca9548";
> +                               #address-cells = <1>;
> +                               #size-cells = <0>;
> +                               reg = <0x70>;
> +                               i2c-mux-idle-disconnect;
> +
> +                               imux72: i2c at 0 {
> +                                       #address-cells = <1>;
> +                                       #size-cells = <0>;
> +                                       reg = <0>;
> +                               };
> +                               imux73: i2c at 1 {
> +                                       #address-cells = <1>;
> +                                       #size-cells = <0>;
> +                                       reg = <1>;
> +                               };
> +                               imux74: i2c at 2 {
> +                                       #address-cells = <1>;
> +                                       #size-cells = <0>;
> +                                       reg = <2>;
> +                               };
> +                               imux75: i2c at 3 {
> +                                       #address-cells = <1>;
> +                                       #size-cells = <0>;
> +                                       reg = <3>;
> +                               };
> +                               imux76: i2c at 4 {
> +                                       #address-cells = <1>;
> +                                       #size-cells = <0>;
> +                                       reg = <4>;
> +                               };
> +                               imux77: i2c at 5 {
> +                                       #address-cells = <1>;
> +                                       #size-cells = <0>;
> +                                       reg = <5>;
> +                               };
> +                               imux78: i2c at 6 {
> +                                       #address-cells = <1>;
> +                                       #size-cells = <0>;
> +                                       reg = <6>;
> +                               };
> +                               imux79: i2c at 7 {
> +                                       #address-cells = <1>;
> +                                       #size-cells = <0>;
> +                                       reg = <7>;
> +                               };
> +                       };
> +
> +                       i2c-switch at 73 {
> +                               compatible = "nxp,pca9548";
> +                               #address-cells = <1>;
> +                               #size-cells = <0>;
> +                               reg = <0x73>;
> +                               i2c-mux-idle-disconnect;
> +
> +                               imux80: i2c at 0 {
> +                                       #address-cells = <1>;
> +                                       #size-cells = <0>;
> +                                       reg = <0>;
> +                               };
> +                               imux81: i2c at 1 {
> +                                       #address-cells = <1>;
> +                                       #size-cells = <0>;
> +                                       reg = <1>;
> +                               };
> +                               imux82: i2c at 2 {
> +                                       #address-cells = <1>;
> +                                       #size-cells = <0>;
> +                                       reg = <2>;
> +                               };
> +                               imux83: i2c at 3 {
> +                                       #address-cells = <1>;
> +                                       #size-cells = <0>;
> +                                       reg = <3>;
> +                               };
> +                               imux84: i2c at 4 {
> +                                       #address-cells = <1>;
> +                                       #size-cells = <0>;
> +                                       reg = <4>;
> +                               };
> +                               imux85: i2c at 5 {
> +                                       #address-cells = <1>;
> +                                       #size-cells = <0>;
> +                                       reg = <5>;
> +                               };
> +                               imux86: i2c at 6 {
> +                                       #address-cells = <1>;
> +                                       #size-cells = <0>;
> +                                       reg = <6>;
> +                               };
> +                               imux87: i2c at 7 {
> +                                       #address-cells = <1>;
> +                                       #size-cells = <0>;
> +                                       reg = <7>;
> +                               };
> +                       };
>                 };
>
> +               /* To Line Card #4 */
>                 imux21: i2c at 5 {
>                         #address-cells = <1>;
>                         #size-cells = <0>;
>                         reg = <5>;
> +
> +                       i2c-switch at 70 {
> +                               compatible = "nxp,pca9548";
> +                               #address-cells = <1>;
> +                               #size-cells = <0>;
> +                               reg = <0x70>;
> +                               i2c-mux-idle-disconnect;
> +
> +                               imux88: i2c at 0 {
> +                                       #address-cells = <1>;
> +                                       #size-cells = <0>;
> +                                       reg = <0>;
> +                               };
> +                               imux89: i2c at 1 {
> +                                       #address-cells = <1>;
> +                                       #size-cells = <0>;
> +                                       reg = <1>;
> +                               };
> +                               imux90: i2c at 2 {
> +                                       #address-cells = <1>;
> +                                       #size-cells = <0>;
> +                                       reg = <2>;
> +                               };
> +                               imux91: i2c at 3 {
> +                                       #address-cells = <1>;
> +                                       #size-cells = <0>;
> +                                       reg = <3>;
> +                               };
> +                               imux92: i2c at 4 {
> +                                       #address-cells = <1>;
> +                                       #size-cells = <0>;
> +                                       reg = <4>;
> +                               };
> +                               imux93: i2c at 5 {
> +                                       #address-cells = <1>;
> +                                       #size-cells = <0>;
> +                                       reg = <5>;
> +                               };
> +                               imux94: i2c at 6 {
> +                                       #address-cells = <1>;
> +                                       #size-cells = <0>;
> +                                       reg = <6>;
> +                               };
> +                               imux95: i2c at 7 {
> +                                       #address-cells = <1>;
> +                                       #size-cells = <0>;
> +                                       reg = <7>;
> +                               };
> +                       };
> +
> +                       i2c-switch at 73 {
> +                               compatible = "nxp,pca9548";
> +                               #address-cells = <1>;
> +                               #size-cells = <0>;
> +                               reg = <0x73>;
> +                               i2c-mux-idle-disconnect;
> +
> +                               imux96: i2c at 0 {
> +                                       #address-cells = <1>;
> +                                       #size-cells = <0>;
> +                                       reg = <0>;
> +                               };
> +                               imux97: i2c at 1 {
> +                                       #address-cells = <1>;
> +                                       #size-cells = <0>;
> +                                       reg = <1>;
> +                               };
> +                               imux98: i2c at 2 {
> +                                       #address-cells = <1>;
> +                                       #size-cells = <0>;
> +                                       reg = <2>;
> +                               };
> +                               imux99: i2c at 3 {
> +                                       #address-cells = <1>;
> +                                       #size-cells = <0>;
> +                                       reg = <3>;
> +                               };
> +                               imux100: i2c at 4 {
> +                                       #address-cells = <1>;
> +                                       #size-cells = <0>;
> +                                       reg = <4>;
> +                               };
> +                               imux101: i2c at 5 {
> +                                       #address-cells = <1>;
> +                                       #size-cells = <0>;
> +                                       reg = <5>;
> +                               };
> +                               imux102: i2c at 6 {
> +                                       #address-cells = <1>;
> +                                       #size-cells = <0>;
> +                                       reg = <6>;
> +                               };
> +                               imux103: i2c at 7 {
> +                                       #address-cells = <1>;
> +                                       #size-cells = <0>;
> +                                       reg = <7>;
> +                               };
> +                       };
>                 };
>
> +               /* To Fabric Card #3 */
>                 imux22: i2c at 6 {
>                         #address-cells = <1>;
>                         #size-cells = <0>;
>                         reg = <6>;
> +
> +                       i2c-switch at 70 {
> +                               compatible = "nxp,pca9548";
> +                               #address-cells = <1>;
> +                               #size-cells = <0>;
> +                               reg = <0x70>;
> +                               i2c-mux-idle-disconnect;
> +
> +                               imux136: i2c at 0 {
> +                                       #address-cells = <1>;
> +                                       #size-cells = <0>;
> +                                       reg = <0>;
> +                               };
> +                               imux137: i2c at 1 {
> +                                       #address-cells = <1>;
> +                                       #size-cells = <0>;
> +                                       reg = <1>;
> +                               };
> +                               imux138: i2c at 2 {
> +                                       #address-cells = <1>;
> +                                       #size-cells = <0>;
> +                                       reg = <2>;
> +                               };
> +                               imux139: i2c at 3 {
> +                                       #address-cells = <1>;
> +                                       #size-cells = <0>;
> +                                       reg = <3>;
> +                               };
> +                               imux140: i2c at 4 {
> +                                       #address-cells = <1>;
> +                                       #size-cells = <0>;
> +                                       reg = <4>;
> +                               };
> +                               imux141: i2c at 5 {
> +                                       #address-cells = <1>;
> +                                       #size-cells = <0>;
> +                                       reg = <5>;
> +                               };
> +                               imux142: i2c at 6 {
> +                                       #address-cells = <1>;
> +                                       #size-cells = <0>;
> +                                       reg = <6>;
> +                               };
> +                               imux143: i2c at 7 {
> +                                       #address-cells = <1>;
> +                                       #size-cells = <0>;
> +                                       reg = <7>;
> +                               };
> +                       };
> +
> +                       i2c-switch at 73 {
> +                               compatible = "nxp,pca9548";
> +                               #address-cells = <1>;
> +                               #size-cells = <0>;
> +                               reg = <0x73>;
> +                               i2c-mux-idle-disconnect;
> +
> +                               imux144: i2c at 0 {
> +                                       #address-cells = <1>;
> +                                       #size-cells = <0>;
> +                                       reg = <0>;
> +                               };
> +                               imux145: i2c at 1 {
> +                                       #address-cells = <1>;
> +                                       #size-cells = <0>;
> +                                       reg = <1>;
> +                               };
> +                               imux146: i2c at 2 {
> +                                       #address-cells = <1>;
> +                                       #size-cells = <0>;
> +                                       reg = <2>;
> +                               };
> +                               imux147: i2c at 3 {
> +                                       #address-cells = <1>;
> +                                       #size-cells = <0>;
> +                                       reg = <3>;
> +                               };
> +                               imux148: i2c at 4 {
> +                                       #address-cells = <1>;
> +                                       #size-cells = <0>;
> +                                       reg = <4>;
> +                               };
> +                               imux149: i2c at 5 {
> +                                       #address-cells = <1>;
> +                                       #size-cells = <0>;
> +                                       reg = <5>;
> +                               };
> +                               imux150: i2c at 6 {
> +                                       #address-cells = <1>;
> +                                       #size-cells = <0>;
> +                                       reg = <6>;
> +                               };
> +                               imux151: i2c at 7 {
> +                                       #address-cells = <1>;
> +                                       #size-cells = <0>;
> +                                       reg = <7>;
> +                               };
> +                       };
>                 };
>
> +               /* To Fabric Card #4 */
>                 imux23: i2c at 7 {
>                         #address-cells = <1>;
>                         #size-cells = <0>;
>                         reg = <7>;
> +
> +                       i2c-switch at 70 {
> +                               compatible = "nxp,pca9548";
> +                               #address-cells = <1>;
> +                               #size-cells = <0>;
> +                               reg = <0x70>;
> +                               i2c-mux-idle-disconnect;
> +
> +                               imux152: i2c at 0 {
> +                                       #address-cells = <1>;
> +                                       #size-cells = <0>;
> +                                       reg = <0>;
> +                               };
> +                               imux153: i2c at 1 {
> +                                       #address-cells = <1>;
> +                                       #size-cells = <0>;
> +                                       reg = <1>;
> +                               };
> +                               imux154: i2c at 2 {
> +                                       #address-cells = <1>;
> +                                       #size-cells = <0>;
> +                                       reg = <2>;
> +                               };
> +                               imux155: i2c at 3 {
> +                                       #address-cells = <1>;
> +                                       #size-cells = <0>;
> +                                       reg = <3>;
> +                               };
> +                               imux156: i2c at 4 {
> +                                       #address-cells = <1>;
> +                                       #size-cells = <0>;
> +                                       reg = <4>;
> +                               };
> +                               imux157: i2c at 5 {
> +                                       #address-cells = <1>;
> +                                       #size-cells = <0>;
> +                                       reg = <5>;
> +                               };
> +                               imux158: i2c at 6 {
> +                                       #address-cells = <1>;
> +                                       #size-cells = <0>;
> +                                       reg = <6>;
> +                               };
> +                               imux159: i2c at 7 {
> +                                       #address-cells = <1>;
> +                                       #size-cells = <0>;
> +                                       reg = <7>;
> +                               };
> +                       };
> +
> +                       i2c-switch at 73 {
> +                               compatible = "nxp,pca9548";
> +                               #address-cells = <1>;
> +                               #size-cells = <0>;
> +                               reg = <0x73>;
> +                               i2c-mux-idle-disconnect;
> +
> +                               imux160: i2c at 0 {
> +                                       #address-cells = <1>;
> +                                       #size-cells = <0>;
> +                                       reg = <0>;
> +                               };
> +                               imux161: i2c at 1 {
> +                                       #address-cells = <1>;
> +                                       #size-cells = <0>;
> +                                       reg = <1>;
> +                               };
> +                               imux162: i2c at 2 {
> +                                       #address-cells = <1>;
> +                                       #size-cells = <0>;
> +                                       reg = <2>;
> +                               };
> +                               imux163: i2c at 3 {
> +                                       #address-cells = <1>;
> +                                       #size-cells = <0>;
> +                                       reg = <3>;
> +                               };
> +                               imux164: i2c at 4 {
> +                                       #address-cells = <1>;
> +                                       #size-cells = <0>;
> +                                       reg = <4>;
> +                               };
> +                               imux165: i2c at 5 {
> +                                       #address-cells = <1>;
> +                                       #size-cells = <0>;
> +                                       reg = <5>;
> +                               };
> +                               imux166: i2c at 6 {
> +                                       #address-cells = <1>;
> +                                       #size-cells = <0>;
> +                                       reg = <6>;
> +                               };
> +                               imux167: i2c at 7 {
> +                                       #address-cells = <1>;
> +                                       #size-cells = <0>;
> +                                       reg = <7>;
> +                               };
> +                       };
>                 };
>         };
>  };
> @@ -165,6 +1188,7 @@
>                 #address-cells = <1>;
>                 #size-cells = <0>;
>                 reg = <0x71>;
> +               i2c-mux-idle-disconnect;
>
>                 imux24: i2c at 0 {
>                         #address-cells = <1>;
> @@ -252,7 +1276,7 @@
>  };
>
>  /*
> - * I2C bus to Fan Control Board.
> + * I2C bus to Fan Control Boards.
>   */
>  &i2c8 {
>         status = "okay";
> @@ -262,29 +1286,230 @@
>                 #address-cells = <1>;
>                 #size-cells = <0>;
>                 reg = <0x77>;
> +               i2c-mux-idle-disconnect;
>
> +               /* To Fan Control Board #1 */
>                 imux32: i2c at 0 {
>                         #address-cells = <1>;
>                         #size-cells = <0>;
>                         reg = <0>;
> +
> +                       i2c-switch at 70 {
> +                               compatible = "nxp,pca9548";
> +                               #address-cells = <1>;
> +                               #size-cells = <0>;
> +                               reg = <0x70>;
> +                               i2c-mux-idle-disconnect;
> +
> +                               imux168: i2c at 0 {
> +                                       #address-cells = <1>;
> +                                       #size-cells = <0>;
> +                                       reg = <0>;
> +                               };
> +                               imux169: i2c at 1 {
> +                                       #address-cells = <1>;
> +                                       #size-cells = <0>;
> +                                       reg = <1>;
> +                               };
> +                               imux170: i2c at 2 {
> +                                       #address-cells = <1>;
> +                                       #size-cells = <0>;
> +                                       reg = <2>;
> +                               };
> +                               imux171: i2c at 3 {
> +                                       #address-cells = <1>;
> +                                       #size-cells = <0>;
> +                                       reg = <3>;
> +                               };
> +                               imux172: i2c at 4 {
> +                                       #address-cells = <1>;
> +                                       #size-cells = <0>;
> +                                       reg = <4>;
> +                               };
> +                               imux173: i2c at 5 {
> +                                       #address-cells = <1>;
> +                                       #size-cells = <0>;
> +                                       reg = <5>;
> +                               };
> +                               imux174: i2c at 6 {
> +                                       #address-cells = <1>;
> +                                       #size-cells = <0>;
> +                                       reg = <6>;
> +                               };
> +                               imux175: i2c at 7 {
> +                                       #address-cells = <1>;
> +                                       #size-cells = <0>;
> +                                       reg = <7>;
> +                               };
> +                       };
>                 };
>
> +               /* To Fan Control Board #2 */
>                 imux33: i2c at 1 {
>                         #address-cells = <1>;
>                         #size-cells = <0>;
>                         reg = <1>;
> +
> +                       i2c-switch at 70 {
> +                               compatible = "nxp,pca9548";
> +                               #address-cells = <1>;
> +                               #size-cells = <0>;
> +                               reg = <0x70>;
> +                               i2c-mux-idle-disconnect;
> +
> +                               imux176: i2c at 0 {
> +                                       #address-cells = <1>;
> +                                       #size-cells = <0>;
> +                                       reg = <0>;
> +                               };
> +                               imux177: i2c at 1 {
> +                                       #address-cells = <1>;
> +                                       #size-cells = <0>;
> +                                       reg = <1>;
> +                               };
> +                               imux178: i2c at 2 {
> +                                       #address-cells = <1>;
> +                                       #size-cells = <0>;
> +                                       reg = <2>;
> +                               };
> +                               imux179: i2c at 3 {
> +                                       #address-cells = <1>;
> +                                       #size-cells = <0>;
> +                                       reg = <3>;
> +                               };
> +                               imux180: i2c at 4 {
> +                                       #address-cells = <1>;
> +                                       #size-cells = <0>;
> +                                       reg = <4>;
> +                               };
> +                               imux181: i2c at 5 {
> +                                       #address-cells = <1>;
> +                                       #size-cells = <0>;
> +                                       reg = <5>;
> +                               };
> +                               imux182: i2c at 6 {
> +                                       #address-cells = <1>;
> +                                       #size-cells = <0>;
> +                                       reg = <6>;
> +                               };
> +                               imux183: i2c at 7 {
> +                                       #address-cells = <1>;
> +                                       #size-cells = <0>;
> +                                       reg = <7>;
> +                               };
> +                       };
>                 };
>
> +               /* To Fan Control Board #3 */
>                 imux34: i2c at 2 {
>                         #address-cells = <1>;
>                         #size-cells = <0>;
>                         reg = <2>;
> +
> +                       i2c-switch at 70 {
> +                               compatible = "nxp,pca9548";
> +                               #address-cells = <1>;
> +                               #size-cells = <0>;
> +                               reg = <0x70>;
> +                               i2c-mux-idle-disconnect;
> +
> +                               imux184: i2c at 0 {
> +                                       #address-cells = <1>;
> +                                       #size-cells = <0>;
> +                                       reg = <0>;
> +                               };
> +                               imux185: i2c at 1 {
> +                                       #address-cells = <1>;
> +                                       #size-cells = <0>;
> +                                       reg = <1>;
> +                               };
> +                               imux186: i2c at 2 {
> +                                       #address-cells = <1>;
> +                                       #size-cells = <0>;
> +                                       reg = <2>;
> +                               };
> +                               imux187: i2c at 3 {
> +                                       #address-cells = <1>;
> +                                       #size-cells = <0>;
> +                                       reg = <3>;
> +                               };
> +                               imux188: i2c at 4 {
> +                                       #address-cells = <1>;
> +                                       #size-cells = <0>;
> +                                       reg = <4>;
> +                               };
> +                               imux189: i2c at 5 {
> +                                       #address-cells = <1>;
> +                                       #size-cells = <0>;
> +                                       reg = <5>;
> +                               };
> +                               imux190: i2c at 6 {
> +                                       #address-cells = <1>;
> +                                       #size-cells = <0>;
> +                                       reg = <6>;
> +                               };
> +                               imux191: i2c at 7 {
> +                                       #address-cells = <1>;
> +                                       #size-cells = <0>;
> +                                       reg = <7>;
> +                               };
> +                       };
>                 };
>
> +               /* To Fan Control Board #4 */
>                 imux35: i2c at 3 {
>                         #address-cells = <1>;
>                         #size-cells = <0>;
>                         reg = <3>;
> +
> +                       i2c-switch at 70 {
> +                               compatible = "nxp,pca9548";
> +                               #address-cells = <1>;
> +                               #size-cells = <0>;
> +                               reg = <0x70>;
> +                               i2c-mux-idle-disconnect;
> +
> +                               imux192: i2c at 0 {
> +                                       #address-cells = <1>;
> +                                       #size-cells = <0>;
> +                                       reg = <0>;
> +                               };
> +                               imux193: i2c at 1 {
> +                                       #address-cells = <1>;
> +                                       #size-cells = <0>;
> +                                       reg = <1>;
> +                               };
> +                               imux194: i2c at 2 {
> +                                       #address-cells = <1>;
> +                                       #size-cells = <0>;
> +                                       reg = <2>;
> +                               };
> +                               imux195: i2c at 3 {
> +                                       #address-cells = <1>;
> +                                       #size-cells = <0>;
> +                                       reg = <3>;
> +                               };
> +                               imux196: i2c at 4 {
> +                                       #address-cells = <1>;
> +                                       #size-cells = <0>;
> +                                       reg = <4>;
> +                               };
> +                               imux197: i2c at 5 {
> +                                       #address-cells = <1>;
> +                                       #size-cells = <0>;
> +                                       reg = <5>;
> +                               };
> +                               imux198: i2c at 6 {
> +                                       #address-cells = <1>;
> +                                       #size-cells = <0>;
> +                                       reg = <6>;
> +                               };
> +                               imux199: i2c at 7 {
> +                                       #address-cells = <1>;
> +                                       #size-cells = <0>;
> +                                       reg = <7>;
> +                               };
> +                       };
>                 };
>
>                 imux36: i2c at 4 {
> --
> 2.17.1
>


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