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SubjectRe: [PATCH] arm64: dts: meson-a1: add I2C nodes
Date
Hi Jian,

Jian Hu <jian.hu@amlogic.com> writes:

> There are four I2C controllers in A1 series,
> Share the same comptible with AXG.The I2C nodes
> depend on pinmux and clock controller.
>
> Signed-off-by: Jian Hu <jian.hu@amlogic.com>
> ---
> arch/arm64/boot/dts/amlogic/meson-a1.dtsi | 149 ++++++++++++++++++++++
> 1 file changed, 149 insertions(+)
>
> diff --git a/arch/arm64/boot/dts/amlogic/meson-a1.dtsi b/arch/arm64/boot/dts/amlogic/meson-a1.dtsi
> index eab2ecd36aa8..d0a73d953f5e 100644
> --- a/arch/arm64/boot/dts/amlogic/meson-a1.dtsi
> +++ b/arch/arm64/boot/dts/amlogic/meson-a1.dtsi
> @@ -16,6 +16,13 @@
> #address-cells = <2>;
> #size-cells = <2>;
>
> + aliases {
> + i2c0 = &i2c0;
> + i2c1 = &i2c1;
> + i2c2 = &i2c2;
> + i2c3 = &i2c3;
> + };
> +
> cpus {
> #address-cells = <2>;
> #size-cells = <0>;
> @@ -117,6 +124,46 @@
> };
> };
>
> + i2c0: i2c@1400 {
> + compatible = "amlogic,meson-axg-i2c";
> + reg = <0x0 0x1400 0x0 0x24>;

The AXG DT files use 0x20 for the length. You are using 0x24. I don't
see any additional registers added to the driver, so this doesn't look right.

> + interrupts = <GIC_SPI 32 IRQ_TYPE_EDGE_RISING>;
> + #address-cells = <1>;
> + #size-cells = <0>;
> + clocks = <&clkc_periphs CLKID_I2C_M_A>;
> + status = "disabled";
> + };
> +
> + i2c1: i2c@5c00 {
> + compatible = "amlogic,meson-axg-i2c";
> + reg = <0x0 0x5c00 0x0 0x24>;
> + interrupts = <GIC_SPI 68 IRQ_TYPE_EDGE_RISING>;
> + #address-cells = <1>;
> + #size-cells = <0>;
> + clocks = <&clkc_periphs CLKID_I2C_M_B>;
> + status = "disabled";
> + };
> +
> + i2c2: i2c@6800 {
> + compatible = "amlogic,meson-axg-i2c";
> + reg = <0x0 0x6800 0x0 0x24>;
> + interrupts = <GIC_SPI 76 IRQ_TYPE_EDGE_RISING>;
> + #address-cells = <1>;
> + #size-cells = <0>;
> + clocks = <&clkc_periphs CLKID_I2C_M_C>;
> + status = "disabled";
> + };
> +
> + i2c3: i2c@6c00 {
> + compatible = "amlogic,meson-axg-i2c";
> + reg = <0x0 0x6c00 0x0 0x24>;
> + interrupts = <GIC_SPI 78 IRQ_TYPE_EDGE_RISING>;
> + #address-cells = <1>;
> + #size-cells = <0>;
> + clocks = <&clkc_periphs CLKID_I2C_M_D>;
> + status = "disabled";
> + };
> +
> uart_AO: serial@1c00 {
> compatible = "amlogic,meson-gx-uart",
> "amlogic,meson-ao-uart";
> @@ -171,3 +218,105 @@
> #clock-cells = <0>;
> };
> };
> +
> +&periphs_pinctrl {
> + i2c0_f11_pins:i2c0-f11 {
> + mux {
> + groups = "i2c0_sck_f11",
> + "i2c0_sda_f12";
> + function = "i2c0";
> + bias-pull-up;
> + drive-strength-microamp = <3000>;

Can you also add some comment to the changelog about the need for
drive-strength compared to AXG.

> + };
> + };

Kevin

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