[v5,1/2] dt-bindings: mediatek: Add MT8173 cpufreq driver binding

Message ID 1435717005-20012-2-git-send-email-pi-cheng.chen@linaro.org
State New
Headers show

Commit Message

pi-cheng.chen July 1, 2015, 2:16 a.m.
This patch adds device tree binding document for MT8173 cpufreq driver.

Signed-off-by: Pi-Cheng Chen <pi-cheng.chen@linaro.org>
Reviewed-by: Michael Turquette <mturquette@baylibre.com>
---
 .../devicetree/bindings/cpufreq/cpufreq-mt8173.txt | 145 +++++++++++++++++++++
 1 file changed, 145 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/cpufreq/cpufreq-mt8173.txt

Comments

Viresh Kumar July 8, 2015, 11:19 a.m. | #1
On 01-07-15, 10:16, Pi-Cheng Chen wrote:
> This patch adds device tree binding document for MT8173 cpufreq driver.
> 
> Signed-off-by: Pi-Cheng Chen <pi-cheng.chen@linaro.org>
> Reviewed-by: Michael Turquette <mturquette@baylibre.com>
> ---
>  .../devicetree/bindings/cpufreq/cpufreq-mt8173.txt | 145 +++++++++++++++++++++
>  1 file changed, 145 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/cpufreq/cpufreq-mt8173.txt
> 
> diff --git a/Documentation/devicetree/bindings/cpufreq/cpufreq-mt8173.txt b/Documentation/devicetree/bindings/cpufreq/cpufreq-mt8173.txt
> new file mode 100644
> index 0000000..65701c5
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/cpufreq/cpufreq-mt8173.txt
> @@ -0,0 +1,145 @@
> +
> +Mediatek MT8173 cpufreq driver
> +------------------------------
> +
> +Mediatek MT8173 cpufreq driver for CPU frequency scaling.
> +
> +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.

Don't have any intentions to halt this series anymore, I have
irritated you enough already :)

But, what about moving these bindings in something like a clock
driver?

@Mike: ?

I am asking because these really belong to the clock driver, as I
understood it from Mike. And clearly asked me to not take care of such
things in cpufreq core/drivers.

Another reason is that, later you will kill this driver one day and
use cpufreq-dt. And then you will be required to move these bindings
to a clock driver, as these will stay.

Patch

diff --git a/Documentation/devicetree/bindings/cpufreq/cpufreq-mt8173.txt b/Documentation/devicetree/bindings/cpufreq/cpufreq-mt8173.txt
new file mode 100644
index 0000000..65701c5
--- /dev/null
+++ b/Documentation/devicetree/bindings/cpufreq/cpufreq-mt8173.txt
@@ -0,0 +1,145 @@ 
+
+Mediatek MT8173 cpufreq driver
+------------------------------
+
+Mediatek MT8173 cpufreq driver for CPU frequency scaling.
+
+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.
+- operating-points: Please refer to Documentation/devicetree/bindings/power/opp.txt for
+		    details.
+- 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 trace" 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 trace" is
+	       needed.
+- #cooling-cells:
+- cooling-min-level:
+- cooling-max-level:
+	Please refer to Documentation/devicetree/bindings/thermal/thermal.txt.
+
+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";
+		operating-points = <
+			507000	859000
+			702000	908000
+			1001000	983000
+			1105000	1009000
+			1183000	1028000
+			1404000	1083000
+			1508000	1109000
+			1573000	1125000
+		>;
+		#cooling-cells = <2>;
+		cooling-min-level = <0>;
+		cooling-max-level = <7>;
+	};
+
+	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";
+		operating-points = <
+			507000	859000
+			702000	908000
+			1001000	983000
+			1105000	1009000
+			1183000	1028000
+			1404000	1083000
+			1508000	1109000
+			1573000	1125000
+		>;
+		#cooling-cells = <2>;
+		cooling-min-level = <0>;
+		cooling-max-level = <7>;
+	};
+
+	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";
+		operating-points = <
+			507000	828000
+			702000	867000
+			1001000	927000
+			1209000	968000
+			1404000	1007000
+			1612000	1049000
+			1807000	1089000
+			1989000	1125000
+		>;
+		#cooling-cells = <2>;
+		cooling-min-level = <0>;
+		cooling-max-level = <7>;
+	};
+
+	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";
+		operating-points = <
+			507000	828000
+			702000	867000
+			1001000	927000
+			1209000	968000
+			1404000	1007000
+			1612000	1049000
+			1807000	1089000
+			1989000	1125000
+		>;
+		#cooling-cells = <2>;
+		cooling-min-level = <0>;
+		cooling-max-level = <7>;
+	};
+
+	&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>;
+	};