[PATCH 2/2] ARM: dts: aspeed: Add KCS support for LPC BMC

[Vijay Khemka]

Thanks Jay,
I will take care of your comments and send next version.

Regards
-Vijay

On 12/11/18, 10:40 AM, "Jae Hyun Yoo" <jae.hyun.yoo at linux.intel.com> wrote:

    Hi Vijay,
    
    On 12/10/2018 12:07 PM, Vijay Khemka wrote:
    > Added kcs device support for lpc BMC.
    > 
    > Signed-off-by: Vijay Khemka <vijaykhemka at fb.com>
    > ---
    >   arch/arm/boot/dts/aspeed-g5.dtsi | 29 ++++++++++++++++++++++++++++-
    >   1 file changed, 28 insertions(+), 1 deletion(-)
    > 
    > diff --git a/arch/arm/boot/dts/aspeed-g5.dtsi b/arch/arm/boot/dts/aspeed-g5.dtsi
    > index d107459fc0f8..1bd48655bacb 100644
    > --- a/arch/arm/boot/dts/aspeed-g5.dtsi
    > +++ b/arch/arm/boot/dts/aspeed-g5.dtsi
    > @@ -330,8 +330,35 @@
    >   				ranges = <0x0 0x1e789000 0x1000>;
    >   
    >   				lpc_bmc: lpc-bmc at 0 {
    > -					compatible = "aspeed,ast2500-lpc-bmc";
    > +					compatible = "aspeed,ast2500-lpc-bmc, "simple-mfd", "syscon"";
    >   					reg = <0x0 0x80>;
    > +					reg-io-width = <4>;
    > +
    > +					#address-cells = <1>;
    > +					#size-cells = <1>;
    > +					ranges = <0x0 0x0 0x80>;
    > +
    > +					kcs1: kcs1 at 0 {
    > +						compatible = "aspeed,ast2500-kcs-bmc";
    > +						reg = <0x0 0x80>;
    
    This reg property isn't needed at here because kcs_bmc_aspeed module
    reads regmap from the parent node. Please check below code in the
    driver code.
    
    priv->map = syscon_node_to_regmap(dev->parent->of_node);
    
    > +						interrupts = <8>;
    > +						kcs_chan = <1>;
    > +						status = "disabled";
    > +					};
    > +					kcs2: kcs2 at 0 {
    > +						compatible = "aspeed,ast2500-kcs-bmc";
    > +						reg = <0x0 0x80>;
    
    ditto.
    
    > +						interrupts = <8>;
    > +						kcs_chan = <2>;
    > +						status = "disabled";
    > +					};
    > +					kcs3: kcs3 at 0 {
    > +						compatible = "aspeed,ast2500-kcs-bmc";
    > +						reg = <0x0 0x80>;
    
    ditto.
    
    > +						interrupts = <8>;
    > +						kcs_chan = <3>;
    > +						status = "disabled";
    > +					};
    >   				};
    >   
    >   				lpc_host: lpc-host at 80 {
    > 
    
    You might need to add kcs4 as a sub-node under lpc_host like below:
    
    kcs4: kcs4 at 0 {
    	compatible = "aspeed,ast2500-kcs-bmc";
    	interrupts = <8>;
    	kcs_chan = <4>;
    	status = "disabled";
    };
    
    This would be uses as an SMM channel.
    
    -Jae