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SubjectRe: [PATCH v2 1/2] arm64: dts: ti: k3-am65: disable optional peripherals by default
Rob, Tony, Arnd, SoC maintainers,

On 15:02-20220203, Matthias Schiffer wrote:
> All peripherals that require pinmuxing or other configuration to work
> should be disabled by default. Dependent DTS are adjusted accordingly.

https://lore.kernel.org/linux-arm-kernel/20201112183538.6805-1-nm@ti.com/
reversal all over again.

Is there a specific pattern we are intending to use here? Because, if we
are going down this path (which would be a major churn across multiple
downstream trees as well) - I'd rather have this as a documented
standard and not just a TI approach and will need to be done across all
K3 devices.

Are you aware of such a documented guideline, rather than "word of
mouth"? Maybe I have'nt looked deep enough, but checking..

>
> The following nodes are now "disabled" according to dtx_diff and were not
> overridden to "okay", as they define no pinctrl:


> k3-am654-base-board:
> - mcu_i2c0
> - mcu_spi0..2
> - mcu_uart0
> - cal
> - main_i2c3
> - ehrpwm0..5
> - main_uart1..2
> - main_spi1..4
>
> k3-am65-iot2050*:
> - mci_spi1..2
> - cal
> - ehrpwm0..5
> - main_spi0..4
>
> Signed-off-by: Matthias Schiffer <matthias.schiffer@ew.tq-group.com>
> ---
[...]

> diff --git a/arch/arm64/boot/dts/ti/k3-am65-main.dtsi b/arch/arm64/boot/dts/ti/k3-am65-main.dtsi
> index ce8bb4a61011e..5aa425d1ba802 100644
> --- a/arch/arm64/boot/dts/ti/k3-am65-main.dtsi
> +++ b/arch/arm64/boot/dts/ti/k3-am65-main.dtsi
> @@ -64,6 +64,7 @@ serdes0: serdes@900000 {
> ti,serdes-clk = <&serdes0_clk>;

[...]

> @@ -1337,6 +1388,7 @@ icssg2_mdio: mdio@32400 {
> #address-cells = <1>;
> #size-cells = <0>;
> bus_freq = <1000000>;
> + status = "disabled";
> };
> };
> };
> diff --git a/arch/arm64/boot/dts/ti/k3-am65-mcu.dtsi b/arch/arm64/boot/dts/ti/k3-am65-mcu.dtsi
> index 8d592bf41d6f1..57ac3a493adbe 100644
> --- a/arch/arm64/boot/dts/ti/k3-am65-mcu.dtsi
> +++ b/arch/arm64/boot/dts/ti/k3-am65-mcu.dtsi
> @@ -22,11 +22,12 @@ phy_gmii_sel: phy@4040 {
>
> mcu_uart0: serial@40a00000 {
> compatible = "ti,am654-uart";
> - reg = <0x00 0x40a00000 0x00 0x100>;
> - interrupts = <GIC_SPI 565 IRQ_TYPE_LEVEL_HIGH>;
> - clock-frequency = <96000000>;
> - current-speed = <115200>;
> - power-domains = <&k3_pds 149 TI_SCI_PD_EXCLUSIVE>;
> + reg = <0x00 0x40a00000 0x00 0x100>;
> + interrupts = <GIC_SPI 565 IRQ_TYPE_LEVEL_HIGH>;
> + clock-frequency = <96000000>;
> + current-speed = <115200>;
> + power-domains = <&k3_pds 149 TI_SCI_PD_EXCLUSIVE>;

When doing these kind of changes, do not include ancillary tab cleanups.
keep such cleanups separate patch.

> + status = "disabled";

> };
>
> mcu_ram: sram@41c00000 {
> @@ -46,6 +47,7 @@ mcu_i2c0: i2c@40b00000 {
> clock-names = "fck";
> clocks = <&k3_clks 114 1>;
> power-domains = <&k3_pds 114 TI_SCI_PD_EXCLUSIVE>;
> + status = "disabled";
> };
>
> mcu_spi0: spi@40300000 {
> @@ -56,6 +58,7 @@ mcu_spi0: spi@40300000 {
> power-domains = <&k3_pds 142 TI_SCI_PD_EXCLUSIVE>;
> #address-cells = <1>;
> #size-cells = <0>;
> + status = "disabled";
> };
>
--
Regards,
Nishanth Menon
Key (0xDDB5849D1736249D)/Fingerprint: F8A2 8693 54EB 8232 17A3 1A34 DDB5 849D 1736 249D

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