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Message-ID: <1038e552-7659-a093-33f6-238d3985b65a@amd.com>
Date: Fri, 24 Jul 2020 14:31:37 -0500
From: Supreeth Venkatesh <supreeth.venkatesh@....com>
To: Joel Stanley <joel@....id.au>
Cc: Andrew Jeffery <andrew@...id.au>,
devicetree <devicetree@...r.kernel.org>,
Linux ARM <linux-arm-kernel@...ts.infradead.org>,
linux-aspeed <linux-aspeed@...ts.ozlabs.org>,
Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
OpenBMC Maillist <openbmc@...ts.ozlabs.org>,
Rob Herring <robh+dt@...nel.org>
Subject: Re: [PATCH v2 1/1] ARM:dts:aspeed: Initial device tree for AMD
EthanolX
On 7/23/20 2:23 AM, Joel Stanley wrote:
> [CAUTION: External Email]
>
> On Wed, 22 Jul 2020 at 21:55, Supreeth Venkatesh
> <supreeth.venkatesh@....com> wrote:
>>
>> Initial introduction of AMD EthanolX platform equipped with an
>> Aspeed ast2500 BMC manufactured by AMD.
>>
>> AMD EthanolX platform is an AMD customer reference board with an
>> Aspeed ast2500 BMC manufactured by AMD.
>> This adds AMD EthanolX device tree file including the flash layout
>> used by EthanolX BMC machines.
>>
>> This also adds an entry of AMD EthanolX device tree file in Makefile.
>>
>> Signed-off-by: Supreeth Venkatesh <supreeth.venkatesh@....com>
>> ---
>> Changes since v1:
>> * Addressed review comment regarding SPDX License Identifier
>> * Added I2c0 and I2c1 which cater to AMD's APML Interface
>> ---
>> arch/arm/boot/dts/Makefile | 1 +
>> arch/arm/boot/dts/aspeed-bmc-amd-ethanolx.dts | 221 ++++++++++++++++++
>> 2 files changed, 222 insertions(+)
>> create mode 100644 arch/arm/boot/dts/aspeed-bmc-amd-ethanolx.dts
>>
>> diff --git a/arch/arm/boot/dts/Makefile b/arch/arm/boot/dts/Makefile
>> index d6dfdf73e66b..55ed881d2ebc 100644
>> --- a/arch/arm/boot/dts/Makefile
>> +++ b/arch/arm/boot/dts/Makefile
>> @@ -1281,6 +1281,7 @@ dtb-$(CONFIG_ARCH_ZX) += zx296702-ad1.dtb
>> dtb-$(CONFIG_ARCH_ASPEED) += \
>> aspeed-ast2500-evb.dtb \
>> aspeed-ast2600-evb.dtb \
>> + aspeed-bmc-amd-ethanolx.dtb \
>> aspeed-bmc-arm-centriq2400-rep.dtb \
>> aspeed-bmc-arm-stardragon4800-rep2.dtb \
>> aspeed-bmc-facebook-cmm.dtb \
>> diff --git a/arch/arm/boot/dts/aspeed-bmc-amd-ethanolx.dts b/arch/arm/boot/dts/aspeed-bmc-amd-ethanolx.dts
>> new file mode 100644
>> index 000000000000..3d67fa31a3ab
>> --- /dev/null
>> +++ b/arch/arm/boot/dts/aspeed-bmc-amd-ethanolx.dts
>> @@ -0,0 +1,221 @@
>> +// SPDX-License-Identifier: GPL-2.0
>> +// Copyright (c) 2020 AMD Inc.
>> +// Author: Supreeth Venkatesh <supreeth.venkatesh@....com>
>> +/dts-v1/;
>> +
>> +#include "aspeed-g5.dtsi"
>> +#include <dt-bindings/gpio/aspeed-gpio.h>
>> +
>> +/ {
>> + model = "AMD EthanolX BMC";
>> + compatible = "amd,ethanolx-bmc", "aspeed,ast2500";
>> +
>> + memory@...00000 {
>> + reg = <0x80000000 0x20000000>;
>> + };
>> + aliases {
>> + serial0 = &uart1;
>> + serial4 = &uart5;
>> + };
>> + chosen {
>> + stdout-path = &uart5;
>> + bootargs = "console=ttyS4,115200 earlyprintk";
>> + };
>> + leds {
>> + compatible = "gpio-leds";
>> +
>> + fault {
>> + gpios = <&gpio ASPEED_GPIO(A, 2) GPIO_ACTIVE_LOW>;
>> + };
>> +
>> + identify {
>> + gpios = <&gpio ASPEED_GPIO(A, 3) GPIO_ACTIVE_LOW>;
>> + };
>> + };
>> + iio-hwmon {
>> + compatible = "iio-hwmon";
>> + io-channels = <&adc 0>, <&adc 1>, <&adc 2>, <&adc 3>, <&adc 4>;
>> + };
>> +};
>> +
>> +&fmc {
>> + status = "okay";
>> + flash@0 {
>> + status = "okay";
>> + m25p,fast-read;
>> + #include "openbmc-flash-layout.dtsi"
>> + };
>> +};
>> +
>> +
>> +&mac0 {
>> + status = "okay";
>> +
>> + pinctrl-names = "default";
>> + pinctrl-0 = <&pinctrl_rmii1_default>;
>> + clocks = <&syscon ASPEED_CLK_GATE_MAC1CLK>,
>> + <&syscon ASPEED_CLK_MAC1RCLK>;
>> + clock-names = "MACCLK", "RCLK";
>> +};
>> +
>> +&uart1 {
>> + //Host Console
>> + status = "okay";
>> + pinctrl-names = "default";
>> + pinctrl-0 = <&pinctrl_txd1_default
>> + &pinctrl_rxd1_default>;
>> +};
>> +
>> +&uart5 {
>> + //BMC Console
>> + status = "okay";
>> +};
>> +
>> +&adc {
>> + status = "okay";
>> +
>> + pinctrl-names = "default";
>> + pinctrl-0 = <&pinctrl_adc0_default
>> + &pinctrl_adc1_default
>> + &pinctrl_adc2_default
>> + &pinctrl_adc3_default
>> + &pinctrl_adc4_default>;
>> +};
>> +
>> +//APML for P0
>> +&i2c0 {
>> + reg = <0x80 0x40>;
>> + status = "okay";
>> +};
>> +
>> +//APML for P1
>> +&i2c1 {
>> + reg = <0xc0 0x40>;
>
> This is unusual. i2c1 is at 0x80; this will clash with i2c2.
>
> Note that the i2c naming in linux counts from zero, whereas the ASPEED
> docs count from 1. So if your board layout has I2C1, you actually want
> i2c2 in the device tree.
Thanks for catching this. Patch v3 sent.
>
>> + status = "okay";
>> +};
>> +
>> +// Thermal Sensors
>> +&i2c7 {
>> + status = "okay";
>> +
>> + lm75a@48 {
>> + compatible = "national,lm75a";
>> + reg = <0x48>;
>> + };
>> +
>> + lm75a@49 {
>> + compatible = "national,lm75a";
>> + reg = <0x49>;
>> + };
>> +
>> + lm75a@4a {
>> + compatible = "national,lm75a";
>> + reg = <0x4a>;
>> + };
>> +
>> + lm75a@4b {
>> + compatible = "national,lm75a";
>> + reg = <0x4b>;
>> + };
>> +
>> + lm75a@4c {
>> + compatible = "national,lm75a";
>> + reg = <0x4c>;
>> + };
>> +
>> + lm75a@4d {
>> + compatible = "national,lm75a";
>> + reg = <0x4d>;
>> + };
>> +
>> + lm75a@4e {
>> + compatible = "national,lm75a";
>> + reg = <0x4e>;
>> + };
>> +
>> + lm75a@4f {
>> + compatible = "national,lm75a";
>> + reg = <0x4f>;
>> + };
>> +};
>> +
>> +&kcs1 {
>> + status = "okay";
>> + kcs_addr = <0x60>;
>> +};
>> +
>> +&kcs2 {
>> + status = "okay";
>> + kcs_addr = <0x62>;
>> +};
>> +
>> +&kcs4 {
>> + status = "okay";
>> + kcs_addr = <0x97DE>;
>> +};
>> +
>> +&lpc_snoop {
>> + status = "okay";
>> + snoop-ports = <0x80>;
>> +};
>> +
>> +&lpc_ctrl {
>> + //Enable lpc clock
>> + status = "okay";
>> +};
>> +
>> +&pwm_tacho {
>> + status = "okay";
>> + pinctrl-names = "default";
>> + pinctrl-0 = <&pinctrl_pwm0_default
>> + &pinctrl_pwm1_default
>> + &pinctrl_pwm2_default
>> + &pinctrl_pwm3_default
>> + &pinctrl_pwm4_default
>> + &pinctrl_pwm5_default
>> + &pinctrl_pwm6_default
>> + &pinctrl_pwm7_default>;
>> +
>> + fan@0 {
>> + reg = <0x00>;
>> + aspeed,fan-tach-ch = /bits/ 8 <0x00>;
>> + };
>> +
>> + fan@1 {
>> + reg = <0x01>;
>> + aspeed,fan-tach-ch = /bits/ 8 <0x01>;
>> + };
>> +
>> + fan@2 {
>> + reg = <0x02>;
>> + aspeed,fan-tach-ch = /bits/ 8 <0x02>;
>> + };
>> +
>> + fan@3 {
>> + reg = <0x03>;
>> + aspeed,fan-tach-ch = /bits/ 8 <0x03>;
>> + };
>> +
>> + fan@4 {
>> + reg = <0x04>;
>> + aspeed,fan-tach-ch = /bits/ 8 <0x04>;
>> + };
>> +
>> + fan@5 {
>> + reg = <0x05>;
>> + aspeed,fan-tach-ch = /bits/ 8 <0x05>;
>> + };
>> +
>> + fan@6 {
>> + reg = <0x06>;
>> + aspeed,fan-tach-ch = /bits/ 8 <0x06>;
>> + };
>> +
>> + fan@7 {
>> + reg = <0x07>;
>> + aspeed,fan-tach-ch = /bits/ 8 <0x07>;
>> + };
>> +};
>> +
>> +
>> +
>> --
>> 2.17.1
>>
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