[PATCH linux dev-4.10 v2] ARM: aspeed: Add Mellanox MSN machine

Mykola Kostenok c_mykolak at mellanox.com
Mon May 29 21:23:06 AEST 2017


> -----Original Message-----
> From: joel.stan at gmail.com [mailto:joel.stan at gmail.com] On Behalf Of Joel
> Stanley
> Sent: Friday, May 26, 2017 7:43 AM
> To: Mykola Kostenok <c_mykolak at mellanox.com>; C├ędric Le Goater
> <clg at kaod.org>; Andrew Jeffery <andrew at aj.id.au>
> Cc: OpenBMC Maillist <openbmc at lists.ozlabs.org>
> Subject: Re: [PATCH linux dev-4.10 v2] ARM: aspeed: Add Mellanox MSN
> machine
> 
> Andrew, can you please review the pinmux-y bits?
> 
> Cedric, can you double check the mtd bits?
> 

Hi, Joel.

Thank you for your reviews.

Best Regards. Mykola Kostenok.

> On Fri, May 26, 2017 at 12:49 AM, Mykola Kostenok
> <c_mykolak at mellanox.com> wrote:
> > Initial introduction of Mellanox switches of MSNXXXX family equipped
> > with Aspeed 2520 BMC SoC. This adds the platform early initialization
> > and msn platform device tree file.
> >
> > Signed-off-by: Mykola Kostenok <c_mykolak at mellanox.com>
> > ---
> > v1->v2
> > Fixed issues pointed out by Joel:
> > - Make commit title shorter.
> > - Replace flash layout from separate dtsi to dts.
> > - Change compatible = "mellanox,msnxxxx-bmc" to "mellanox,msn-bmc".
> > - Remove no-hw-checksum from dts.
> > - Add comments.
> > - Remove WD2 disable from aspeed.c
> > - Add wdt2 to dts.
> 
> Looking good!
> 
> Sorry for not getting back to you with some of your questions.
> 
> I think it's okay to have the flash layout in the separate dtsi in the future.
> 
> In general when submitting patches for the kernel we want to have separate
> patches for different parts of the system, one to add the device tree, one to
> add the aspeed.c changes, and another for the defconfigs. Just keep that in
> mind for next time.
> 
> > ---
> >  .../devicetree/bindings/vendor-prefixes.txt        |   1 +
> >  arch/arm/boot/dts/Makefile                         |   1 +
> >  arch/arm/boot/dts/aspeed-bmc-mellanox-msn.dts      | 239
> +++++++++++++++++++++
> >  arch/arm/configs/aspeed_g5_defconfig               |   2 +
> >  arch/arm/mach-aspeed/aspeed.c                      |  23 ++
> >  5 files changed, 266 insertions(+)
> >  create mode 100644 arch/arm/boot/dts/aspeed-bmc-mellanox-msn.dts
> >
> > diff --git a/Documentation/devicetree/bindings/vendor-prefixes.txt
> > b/Documentation/devicetree/bindings/vendor-prefixes.txt
> > index 16d3b5e7f5d1..84601d869a1b 100644
> > --- a/Documentation/devicetree/bindings/vendor-prefixes.txt
> > +++ b/Documentation/devicetree/bindings/vendor-prefixes.txt
> > @@ -172,6 +172,7 @@ meas        Measurement Specialties
> >  mediatek       MediaTek Inc.
> >  melexis        Melexis N.V.
> >  melfas MELFAS Inc.
> > +mellanox       Mellanox Technologies
> >  memsic MEMSIC Inc.
> >  merrii Merrii Technology Co., Ltd.
> >  micrel Micrel Inc.
> > diff --git a/arch/arm/boot/dts/Makefile b/arch/arm/boot/dts/Makefile
> > index 30fe65627f30..3dba6c633686 100644
> > --- a/arch/arm/boot/dts/Makefile
> > +++ b/arch/arm/boot/dts/Makefile
> > @@ -990,6 +990,7 @@ dtb-$(CONFIG_ARCH_ASPEED) += aspeed-bmc-
> opp-palmetto.dtb \
> >         aspeed-bmc-opp-witherspoon.dtb \
> >         aspeed-bmc-opp-zaius.dtb \
> >         aspeed-bmc-opp-lanyang.dtb \
> > +       aspeed-bmc-mellanox-msn.dtb \
> >         aspeed-ast2500-evb.dtb
> >  endif
> >
> > diff --git a/arch/arm/boot/dts/aspeed-bmc-mellanox-msn.dts
> > b/arch/arm/boot/dts/aspeed-bmc-mellanox-msn.dts
> > new file mode 100644
> > index 000000000000..a29b279b4f40
> > --- /dev/null
> > +++ b/arch/arm/boot/dts/aspeed-bmc-mellanox-msn.dts
> > @@ -0,0 +1,239 @@
> > +/dts-v1/;
> > +
> > +#include <dt-bindings/thermal/thermal.h> #include
> > +<dt-bindings/pwm/pwm.h> #include <dt-bindings/gpio/gpio.h> #include
> > +<dt-bindings/interrupt-controller/irq.h>
> 
> I don't think you're using any defines from these headers. You can remove
> the includes.
> 
> > +#include <dt-bindings/gpio/aspeed-gpio.h> #include "aspeed-g5.dtsi"
> > +
> > +/ {
> > +       model = "MSN BMC";
> > +       compatible = "mellanox,msn-bmc", "aspeed,ast2500";
> > +
> > +       aliases {
> > +               serial0 = &uart1;
> > +               serial4 = &uart5;
> > +       };
> > +
> > +       chosen {
> > +               stdout-path = &uart5;
> > +               bootargs = "console=ttyS4,115200n8 earlyprintk";
> > +       };
> > +
> > +       memory {
> > +               /* 512MiB SDRAM DDR4 @ 0x8000_0000 */
> > +               reg = <0x80000000 0x20000000>;
> > +       };
> > +
> > +       ahb {
> > +               bmc_pnor: fmc at 1e620000 {
> > +                       reg = < 0x1e620000 0xc4
> > +                               0x20000000 0x02000000 >;
> > +                       #address-cells = <1>;
> > +                       #size-cells = <0>;
> > +                       compatible = "aspeed,ast2500-fmc";
> > +                       interrupts = <19>;
> > +                       flash at 0 {
> > +                               reg = < 0 >;
> > +                               compatible = "jedec,spi-nor" ;
> > +                               label = "bmc";
> > +                               #address-cells = < 1 >;
> > +                               #size-cells = < 1 >;
> > +                               u-boot {
> > +                                       reg = < 0 0x60000 >;
> > +                                       label = "u-boot";
> > +                               };
> > +                               u-boot-env {
> > +                                       reg = < 0x60000 0x10000>;
> > +                                       label = "u-boot-env";
> > +                               };
> > +                               kernel  {
> > +                                       reg = < 0x70000 0x280000 >;
> > +                                       label = "kernel";
> > +                               };
> > +                               dtb  {
> > +                                       reg = < 0x2f0000 0x10000 >;
> > +                                       label = "dtb";
> > +                               };
> > +                               initramfs {
> > +                                       reg = < 0x300000 0x1c0000 >;
> > +                                       label = "initramfs";
> > +                               };
> > +                               rofs  {
> > +                                       reg = < 0x4c0000 0x1740000 >;
> > +                                       label = "rofs";
> > +                               };
> > +                               rwfs  {
> > +                                       reg = < 0x1c00000 0x400000 >;
> > +                                       label = "rwfs";
> > +                               };
> > +                       };
> > +               };
> > +
> > +               host_pnor: spi2 at 1e631000 {
> > +                       reg = < 0x1e631000 0xc4
> > +                               0x38000000 0x08000000 >;
> > +                       #address-cells = <1>;
> > +                       #size-cells = <0>;
> > +                       compatible = "aspeed,ast2500-spi";
> > +                       status = "disabled";
> 
> As this is disabled it has no affect. You can remove the entire host_pnor
> node.
> 

Ok. I will remove it.
But should I have somewhere the below definitions:
                       pinctrl-0 = <&pinctrl_spi2ck_default
                                    &pinctrl_spi2cs0_default
                                    &pinctrl_spi2miso_default
                                    &pinctrl_spi2mosi_default>;


> > +                       pinctrl-names = "default";
> > +                       pinctrl-0 = <&pinctrl_spi2ck_default
> > +                                    &pinctrl_spi2cs0_default
> > +                                    &pinctrl_spi2miso_default
> > +                                    &pinctrl_spi2mosi_default>;
> > +
> > +                       host_flash {
> > +                               reg = < 0 >;
> > +                               compatible = "jedec,spi-nor";
> > +                               label = "host_flash";
> > +                               #address-cells = < 1 >;
> > +                               #size-cells = < 1 >;
> > +                       };
> > +               };
> > +       };
> > +};
> > +
> > +&uart5 {
> > +       status = "okay";
> > +};
> > +
> > +&uart1 {
> > +       status = "okay";
> 
> You need to request the pins from pinmux. If you'e got all of the
> RS-232 lines connected, that will look like this:
> 
>         pinctrl-names = "default";
>         pinctrl-0 = <&pinctrl_txd1_default
>                         &pinctrl_rxd1_default
>                         &pinctrl_nrts1_default
>                         &pinctrl_ndtr1_default
>                         &pinctrl_ndsr1_default
>                         &pinctrl_ncts1_default
>                         &pinctrl_ndcd1_default
>                         &pinctrl_nri1_default>;
> 
> You may just have the tx and rx lines connected, in which case it would look
> like this:
> 
>         pinctrl-names = "default";
>         pinctrl-0 = <&pinctrl_txd1_default
>                         &pinctrl_rxd1_default>;
> 
> You will need to check your schematic to work that out.
> 
> > +};
> > +
> > +&mac0 {
> > +       status = "okay";
> > +       use-ncsi;
> > +};
> > +
> > +&i2c0 {
> > +       status = "okay";
> > +};
> > +
> > +&i2c1 {
> > +       status = "okay";
> > +};
> > +
> > +&i2c2 {
> > +       status = "okay";
> > +};
> > +
> > +&i2c3 {
> > +       status = "okay";
> > +};
> > +
> > +&i2c4 {
> > +       status = "okay";
> > +};
> 
> 
> I assume you're enabling these i2c buses so you can use them from
> userspace?
> 

On device i2c4 we have 4 CPLDs, and related kernel driver, which we locate in driver/mfd/.
This driver handles LED, chassis interrupts, selects, exposes through sysfs reset control, reset cause and general info.
It also handles hotplug events, like PSU/FAN/power cable removal/insertion.

For example, FAN EEPROM are located at virtual buses, created by pca9548:
	i2cswitch at 71 {
		compatible = "nxp,pca9548";
		#address-cells = <1>;
		#size-cells = <0>;
		reg = <0x71>;
	};

The physical i2c buses which are not set with  status "ok" are skipped and the numbering of virtual buses will be started from the next available number.
We wants to have them at constant position (in the below fragment this number is specified in bus filed) to have FAN (same for PSU, cables) at same position in sysfs for the different systems.
And we didn't find how enforce  pca9548 to start virtual buses from the desirable number (14 in our case) through dts.

&i2c4 {
	status = "okay";

	mlxcpld-mng-ctrl at 71 {
		#address-cells = <1>;
		#size-cells = <0>;
		compatible = "mellanox,mlxcpld-ctrl-carrier"; ...
		fan {
			aggr_mask = <0x40>;
			reg = <0x88>;
			mask = <0x0f>;

			fan1_eeprom {
				type = "24c32";
				bus = <0x0e>;
				addr = <0x50>;
			};

			fan2_eeprom {
				type = "24c32";
				bus = <0x0f>;
				addr = <0x50>;
			};
...

> > +
> > +&i2c5 {
> > +       status = "okay";
> > +
> > +       eeprom at 50 {
> > +               compatible = "atmel,24c32";
> > +               reg = <0x50>;
> > +       };
> > +
> > +       eeprom at 51 {
> > +               compatible = "atmel,24c32";
> > +               reg = <0x51>;
> > +       };
> > +};
> > +
> > +&i2c6 {
> > +       status = "okay";
> > +
> > +       eeprom at 51 {
> > +               compatible = "atmel,24c32";
> > +               reg = <0x51>;
> > +       };
> > +
> > +       eeprom at 52 {
> > +               compatible = "atmel,24c32";
> > +               reg = <0x52>;
> > +       };
> > +
> > +       eeprom at 55 {
> > +               compatible = "atmel,24c32";
> > +               reg = <0x55>;
> > +       };
> > +
> > +       i2cswitch at 71 {
> > +               compatible = "nxp,pca9548";
> > +               #address-cells = <1>;
> > +               #size-cells = <0>;
> > +               reg = <0x71>;
> > +       };
> > +};
> > +
> > +&i2c7 {
> > +       status = "okay";
> > +};
> > +
> > +&i2c8 {
> > +       status = "okay";
> > +
> > +       carrier_ambient: lm75 at 49 {
> > +               #thermal-sensor-cells = <0>;
> > +               compatible = "national,lm75";
> > +               reg = <0x49>;
> > +       };
> > +
> > +       swbrd_ambient: lm75 at 4a {
> > +               #thermal-sensor-cells = <0>;
> > +               compatible = "national,lm75";
> > +               reg = <0x4a>;
> > +       };
> > +};
> > +
> > +&i2c9 {
> > +       status = "okay";
> > +};
> > +
> > +&i2c10 {
> > +       status = "okay";
> > +
> > +       hwmon at 41 {
> > +               compatible = "ti,ucd9224";
> > +               reg = <0x41>;
> > +       };
> > +
> > +       hwmon at 27 {
> > +               compatible = "ti,ucd9224";
> > +               reg = <0x27>;
> > +       };
> > +
> > +       adc at 6d {
> > +               compatible = "maxim,max11603";
> > +               reg = <0x6d>;
> > +               adc0: iio-device at 0 {
> > +                       #io-channel-cells = <1>;
> > +                       io-channels = <&adc0 0>, <&adc0 1>, <&adc0 2>,
> > +                                     <&adc0 3>, <&adc0 4>, <&adc0 5>,
> > +                                     <&adc0 6>, <&adc0 7>;
> > +               };
> > +       };
> > +};
> > +
> > +&i2c11 {
> > +       status = "okay";
> > +};
> > +
> > +&i2c12 {
> > +       status = "okay";
> > +};
> > +
> > +&i2c13 {
> > +       status = "okay";
> > +};
> > +
> > +&vuart {
> > +       status = "okay";
> > +};
> > +
> > +&wdt2 {
> > +       status = "okay";
> > +};
> > +
> > diff --git a/arch/arm/configs/aspeed_g5_defconfig
> > b/arch/arm/configs/aspeed_g5_defconfig
> > index d0deda45f55b..49a270266fd9 100644
> > --- a/arch/arm/configs/aspeed_g5_defconfig
> > +++ b/arch/arm/configs/aspeed_g5_defconfig
> > @@ -140,6 +140,7 @@ CONFIG_PMBUS=y
> >  CONFIG_SENSORS_ADM1275=y
> >  CONFIG_SENSORS_LM25066=y
> >  CONFIG_SENSORS_UCD9000=y
> > +CONFIG_SENSORS_UCD9200=y
> >  CONFIG_SENSORS_TMP421=y
> >  CONFIG_USB=y
> >  CONFIG_USB_ANNOUNCE_NEW_DEVICES=y
> > @@ -164,6 +165,7 @@ CONFIG_MAILBOX=y
> >  CONFIG_ASPEED_LPC_MBOX=y
> >  # CONFIG_IOMMU_SUPPORT is not set
> >  CONFIG_IIO=y
> > +CONFIG_MAX1363=y
> >  CONFIG_ASPEED_ADC=y
> >  CONFIG_BMP280=y
> >  CONFIG_FSI=y
> > diff --git a/arch/arm/mach-aspeed/aspeed.c
> > b/arch/arm/mach-aspeed/aspeed.c index 0f1a536ba1b2..942cdffed9bd
> > 100644
> > --- a/arch/arm/mach-aspeed/aspeed.c
> > +++ b/arch/arm/mach-aspeed/aspeed.c
> > @@ -188,6 +188,27 @@ static void __init do_lanyang_setup(void)
> >         writel(reg & ~BIT(4), AST_IO(AST_BASE_LPC | 0x98));  }
> >
> > +static void __init do_mellanox_setup(void) {
> > +       unsigned long reg;
> > +
> > +       do_common_setup();
> > +
> > +       /* Set strap to RGMII for dedicated PHY networking */
> > +       reg = readl(AST_IO(AST_BASE_SCU | 0x70));
> > +       reg |= BIT(7);
> > +       reg &= ~BIT(6);
> > +       writel(reg, AST_IO(AST_BASE_SCU | 0x70));
> > +
> > +       /* Disable UART1 Reset from LPC */
> > +       writel(0x00000A00, AST_IO(AST_BASE_LPC | 0x98));
> > +
> > +       /* Enable RMII1 50MHz RCLK output.*/
> > +       reg = readl(AST_IO(AST_BASE_SCU | 0x48));
> > +       reg |= BIT(29);
> > +       writel(reg, AST_IO(AST_BASE_SCU | 0x48)); }
> > +
> >  #define SCU_PASSWORD   0x1688A8A8
> >
> >  static void __init aspeed_init_early(void) @@ -227,6 +248,8 @@ static
> > void __init aspeed_init_early(void)
> >                 do_romulus_setup();
> >         if (of_machine_is_compatible("inventec,lanyang-bmc"))
> >                 do_lanyang_setup();
> > +       if (of_machine_is_compatible("mellanox,msn-bmc"))
> > +               do_mellanox_setup();
> >  }
> >
> >  static void __init aspeed_map_io(void)
> > --
> > 2.11.0
> >


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