17.12.2019 23:03, Sowjanya Komatineni пишет:
> Tegra PMC has 3 clocks clk_out_1, clk_out_2, and clk_out_3.
>
> This patch documents PMC clock bindings and adds a header defining
> Tegra PMC clock ids.
>
> Signed-off-by: Sowjanya Komatineni <skomatineni@xxxxxxxxxx>
> ---
> .../bindings/arm/tegra/nvidia,tegra20-pmc.txt | 37 +++++++++++++++++++++-
> include/dt-bindings/soc/tegra-pmc.h | 15 +++++++++
> 2 files changed, 51 insertions(+), 1 deletion(-)
> create mode 100644 include/dt-bindings/soc/tegra-pmc.h
>
> diff --git a/Documentation/devicetree/bindings/arm/tegra/nvidia,tegra20-pmc.txt b/Documentation/devicetree/bindings/arm/tegra/nvidia,tegra20-pmc.txt
> index cb12f33a247f..80cdcad4ab8c 100644
> --- a/Documentation/devicetree/bindings/arm/tegra/nvidia,tegra20-pmc.txt
> +++ b/Documentation/devicetree/bindings/arm/tegra/nvidia,tegra20-pmc.txt
> @@ -21,6 +21,10 @@ Required properties:
> - clock-names : Must include the following entries:
> "pclk" (The Tegra clock of that name),
> "clk32k_in" (The 32KHz clock input to Tegra).
> +- #clock-cells : Should be 1 for Tegra30 and higher.
> + In clock consumers, this cell represents the PMC clock ID.
> + The assignments may be found in header file
> + <dt-bindings/soc/tegra-pmc.h>.
>
> Optional properties:
> - nvidia,invert-interrupt : If present, inverts the PMU interrupt signal.
> @@ -80,11 +84,12 @@ Optional nodes:
> Example:
>
> / SoC dts including file
> -pmc@7000f400 {
> +pmc: pmc@7000f400 {
> compatible = "nvidia,tegra20-pmc";
> reg = <0x7000e400 0x400>;
> clocks = <&tegra_car 110>, <&clk32k_in>;
> clock-names = "pclk", "clk32k_in";
> + #clock-cells = <1>;
> nvidia,invert-interrupt;
> nvidia,suspend-mode = <1>;
> nvidia,cpu-pwr-good-time = <2000>;
> @@ -171,6 +176,7 @@ Example:
> reg = <0x0 0x7000e400 0x0 0x400>;
> clocks = <&tegra_car TEGRA210_CLK_PCLK>, <&clk32k_in>;
> clock-names = "pclk", "clk32k_in";
> + #clock-cells = <1>;
>
> powergates {
> pd_audio: aud {
> @@ -260,6 +266,7 @@ Pad configuration state example:
> reg = <0x0 0x7000e400 0x0 0x400>;
> clocks = <&tegra_car TEGRA210_CLK_PCLK>, <&clk32k_in>;
> clock-names = "pclk", "clk32k_in";
> + #clock-cells = <1>;
>
> ...
>
> @@ -298,3 +305,31 @@ Pinctrl client example:
> pinctrl-1 = <&hdmi_on>;
> pinctrl-names = "hdmi-on", "hdmi-off";
> };
> +
> +== Clock Control ==
> +
> +Tegra PMC has 3 clocks clk_1, clk_2 and clk_3. Each of these clocks has
> +source selection and enable/disable gate.
> +Parent/source for these clocks can be either of osc, osc_div2, osc_div4,
> +or extern clock from Tegra CAR module.
> +
> +Clock configuration example:
> + pmc: pmc@7000e400 {
> + compatible = "nvidia,tegra210-pmc";
> + reg = <0x0 0x7000e400 0x0 0x400>;
> + clocks = <&tegra_car TEGRA210_CLK_PCLK>, <&clk32k_in>;
> + clock-names = "pclk", "clk32k_in";
> + #clock-cells = <1>;
> + };
> +
> +Clock consumer example:
> + i2c@7000c500 {
> + cam_sensor {
> + ...
> + clocks = <&pmc TEGRA_PMC_CLK_OUT_3>;
> + clock-names = "mclk";
> + assigned-clocks = <&pmc TEGRA_PMC_CLK_OUT_3>;
> + assigned-clock-parents = <&tegra_car TEGRA210_CLK_EXTERN3>;
> + ...
> + };
> + };
> diff --git a/include/dt-bindings/soc/tegra-pmc.h b/include/dt-bindings/soc/tegra-pmc.h
> new file mode 100644
> index 000000000000..f7c866404456
> --- /dev/null
> +++ b/include/dt-bindings/soc/tegra-pmc.h
> @@ -0,0 +1,15 @@
> +/* SPDX-License-Identifier: GPL-2.0-only */
> +/*
> + * Copyright (c) 2019-2020, NVIDIA CORPORATION. All rights reserved.
> + */
> +
> +#ifndef _DT_BINDINGS_SOC_TEGRA_PMC_H
> +#define _DT_BINDINGS_SOC_TEGRA_PMC_H
> +
> +#define TEGRA_PMC_CLK_OUT_1 0
> +#define TEGRA_PMC_CLK_OUT_2 1
> +#define TEGRA_PMC_CLK_OUT_3 2
> +
> +#define TEGRA_PMC_CLK_MAX 3
> +
> +#endif /* _DT_BINDINGS_SOC_TEGRA_PMC_H */
>
The TXT binding should be removed since you converted it to YAML.
