Quoting Pi-Cheng Chen (2015-07-09 03:27:38)
> This patch adds the clock and regulator consumer properties part of
> document for CPU DVFS clocks on Mediatek MT8173 SoC.
>
> Signed-off-by: Pi-Cheng Chen <pi-cheng.c...@linaro.org>
Acked-by: Michael Turquette <mturque...@baylibre.com>
Regards,
Mike
> ---
> .../devicetree/bindings/clock/mt8173-cpu-dvfs.txt | 83
> ++++++++++++++++++++++
> 1 file changed, 83 insertions(+)
> create mode 100644
> Documentation/devicetree/bindings/clock/mt8173-cpu-dvfs.txt
>
> diff --git a/Documentation/devicetree/bindings/clock/mt8173-cpu-dvfs.txt
> b/Documentation/devicetree/bindings/clock/mt8173-cpu-dvfs.txt
> new file mode 100644
> index 0000000..27b3521
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/clock/mt8173-cpu-dvfs.txt
> @@ -0,0 +1,83 @@
> +Device Tree Clock bindings for CPU DVFS clock of Mediatek MT8173 SoC
> +
> +Required properties:
> +- clocks: A list of phandle + clock-specifier pairs for the clocks listed in
> clock names.
> +- clock-names: Should contain the following:
> + "cpu" - The multiplexer for clock input of CPU cluster.
> + "intermediate" - A parent of "cpu" clock which is used as
> "intermediate" clock
> + source (usually MAINPLL) when the original CPU PLL
> is under
> + transition and not stable yet.
> + Please refer to
> Documentation/devicetree/bindings/clk/clock-bindings.txt for
> + generic clock consumer properties.
> +- proc-supply: Regulator for Vproc of CPU cluster.
> +
> +Optional properties:
> +- sram-supply: Regulator for Vsram of CPU cluster. When present, the cpufreq
> driver
> + needs to do "voltage tracking" to step by step scale up/down
> Vproc and
> + Vsram to fit SoC specific needs. When absent, the voltage
> scaling
> + flow is handled by hardware, hence no software "voltage
> tracking" is
> + needed.
> +
> +Example:
> +--------
> + cpu0: cpu@0 {
> + device_type = "cpu";
> + compatible = "arm,cortex-a53";
> + reg = <0x000>;
> + enable-method = "psci";
> + cpu-idle-states = <&CPU_SLEEP_0>;
> + clocks = <&infracfg CLK_INFRA_CA53SEL>,
> + <&apmixedsys CLK_APMIXED_MAINPLL>;
> + clock-names = "cpu", "intermediate";
> + };
> +
> + cpu1: cpu@1 {
> + device_type = "cpu";
> + compatible = "arm,cortex-a53";
> + reg = <0x001>;
> + enable-method = "psci";
> + cpu-idle-states = <&CPU_SLEEP_0>;
> + clocks = <&infracfg CLK_INFRA_CA53SEL>,
> + <&apmixedsys CLK_APMIXED_MAINPLL>;
> + clock-names = "cpu", "intermediate";
> + };
> +
> + cpu2: cpu@100 {
> + device_type = "cpu";
> + compatible = "arm,cortex-a57";
> + reg = <0x100>;
> + enable-method = "psci";
> + cpu-idle-states = <&CPU_SLEEP_0>;
> + clocks = <&infracfg CLK_INFRA_CA57SEL>,
> + <&apmixedsys CLK_APMIXED_MAINPLL>;
> + clock-names = "cpu", "intermediate";
> + };
> +
> + cpu3: cpu@101 {
> + device_type = "cpu";
> + compatible = "arm,cortex-a57";
> + reg = <0x101>;
> + enable-method = "psci";
> + cpu-idle-states = <&CPU_SLEEP_0>;
> + clocks = <&infracfg CLK_INFRA_CA57SEL>,
> + <&apmixedsys CLK_APMIXED_MAINPLL>;
> + clock-names = "cpu", "intermediate";
> + };
> +
> + &cpu0 {
> + proc-supply = <&mt6397_vpca15_reg>;
> + };
> +
> + &cpu1 {
> + proc-supply = <&mt6397_vpca15_reg>;
> + };
> +
> + &cpu2 {
> + proc-supply = <&da9211_vcpu_reg>;
> + sram-supply = <&mt6397_vsramca7_reg>;
> + };
> +
> + &cpu3 {
> + proc-supply = <&da9211_vcpu_reg>;
> + sram-supply = <&mt6397_vsramca7_reg>;
> + };
> --
> 1.9.1
>
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