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Commit b88cf6f7 authored by Guennadi Liakhovetski's avatar Guennadi Liakhovetski Committed by Simon Horman
Browse files

ARM: shmobile: ape6evm-reference: add CPUFreq support 



Add CPUFreq support to ape6evm-reference, using a max8973 regulator, that
is supplying V_DVFS for the 4 CA15 cores on r8a73a4.

Signed-off-by: default avatarGuennadi Liakhovetski <g.liakhovetski+renesas@gmail.com>
Acked-by: default avatarMagnus Damm <damm@opensource.se>
Signed-off-by: default avatarSimon Horman <horms+renesas@verge.net.au>
parent 69f36661

arch/arm/boot/dts/r8a73a4-ape6evm-reference.dts

+22 −0
Original line number Diff line number Diff line
@@ -31,3 +31,25 @@ 
		ranges = <0 0 0 0x80000000>;

	};

};



&i2c5 {

	vdd_dvfs: max8973@1b {

		compatible = "maxim,max8973";

		reg = <0x1b>;



		regulator-min-microvolt = <935000>;

		regulator-max-microvolt = <1200000>;

		regulator-boot-on;

		regulator-always-on;

	};

};



&cpu0 {

	cpu0-supply = <&vdd_dvfs>;

	operating-points = <

		/* kHz  uV */

		1950000 1115000

		1462500  995000

	>;

	voltage-tolerance = <1>; /* 1% */

};

arch/arm/mach-shmobile/board-ape6evm-reference.c

+2 −0
Original line number Diff line number Diff line
@@ -22,6 +22,7 @@ 
#include <linux/kernel.h>

#include <linux/of_platform.h>

#include <linux/pinctrl/machine.h>

#include <linux/platform_device.h>

#include <linux/sh_clk.h>

#include <mach/common.h>

#include <mach/r8a73a4.h>
@@ -56,6 +57,7 @@ static void __init ape6evm_add_standard_devices(void) 
	r8a73a4_pinmux_init();

	r8a73a4_add_dt_devices();

	of_platform_populate(NULL, of_default_bus_match_table, NULL, NULL);

	platform_device_register_simple("cpufreq-cpu0", -1, NULL, 0);

}



static const char *ape6evm_boards_compat_dt[] __initdata = {