On Tue, Jan 02, 2024 at 12:44:09PM +0800, Peter Yin wrote:
> Add spi-gpio for tpm device.
>
> Signed-off-by: Peter Yin <peteryin.openbmc@gmail.com>
> ---
> .../dts/aspeed/aspeed-bmc-facebook-harma.dts | 21 +++++++++++++++++++
> 1 file changed, 21 insertions(+)
>
> diff --git a/arch/arm/boot/dts/aspeed/aspeed-bmc-facebook-harma.dts b/arch/arm/boot/dts/aspeed/aspeed-bmc-facebook-harma.dts
> index 36aad01dda20..25ae044cd176 100644
> --- a/arch/arm/boot/dts/aspeed/aspeed-bmc-facebook-harma.dts
> +++ b/arch/arm/boot/dts/aspeed/aspeed-bmc-facebook-harma.dts
> @@ -28,6 +28,8 @@ aliases {
> i2c29 = &imux29;
> i2c30 = &imux30;
> i2c31 = &imux31;
> +
> + spi1 = &spi_gpio;
> };
>
> chosen {
> @@ -67,6 +69,25 @@ led-2 {
> gpios = <&gpio0 124 GPIO_ACTIVE_HIGH>;
> };
> };
> +
> + spi_gpio: spi-gpio {
> + status = "okay";
> + compatible = "spi-gpio";
> + #address-cells = <1>;
> + #size-cells = <0>;
> +
> + gpio-sck = <&gpio0 ASPEED_GPIO(Z, 3) GPIO_ACTIVE_HIGH>;
> + gpio-mosi = <&gpio0 ASPEED_GPIO(Z, 4) GPIO_ACTIVE_HIGH>;
> + gpio-miso = <&gpio0 ASPEED_GPIO(Z, 5) GPIO_ACTIVE_HIGH>;
> + num-chipselects = <1>;
> + cs-gpios = <&gpio0 ASPEED_GPIO(Z, 0) GPIO_ACTIVE_LOW>;
> +
> + tpmdev@0 {
> + compatible = "tcg,tpm_tis-spi";
Due to other pending changes, there is a request that all tpm_tis-spi
also contain a compatible with a chip vendor. Please add
"infineon,slb9670".
See https://lore.kernel.org/lkml/ZZTS0p1hdAchIbKp@heinlein.vulture-banana.ts.net/
for more context.
> + spi-max-frequency = <33000000>;
> + reg = <0>;
> + };
> + };
> };
>
> // HOST BIOS Debug
> --
> 2.25.1
>
--
Patrick Williams