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| author | Guennadi Liakhovetski <g.liakhovetski@gmx.de> | 2013-07-08 18:04:58 +0200 |
|---|---|---|
| committer | Simon Horman <horms+renesas@verge.net.au> | 2013-07-17 14:28:31 +0900 |
| commit | b88cf6f732946874aaf3e0528459e0f0271dfcec (patch) | |
| tree | 981120d257fc50ccf30b740dd5a5ed229fff42ad /arch/arm | |
| parent | 69f366615e950cb0d5af89da228796af5208ad8f (diff) | |
| download | linux-b88cf6f732946874aaf3e0528459e0f0271dfcec.tar.bz2 | |
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: Guennadi Liakhovetski <g.liakhovetski+renesas@gmail.com>
Acked-by: Magnus Damm <damm@opensource.se>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
Diffstat (limited to 'arch/arm')
| -rw-r--r-- | arch/arm/boot/dts/r8a73a4-ape6evm-reference.dts | 22 | ||||
| -rw-r--r-- | arch/arm/mach-shmobile/board-ape6evm-reference.c | 2 |
2 files changed, 24 insertions, 0 deletions
diff --git a/arch/arm/boot/dts/r8a73a4-ape6evm-reference.dts b/arch/arm/boot/dts/r8a73a4-ape6evm-reference.dts index 3251f059c25b..6f4506e737ac 100644 --- a/arch/arm/boot/dts/r8a73a4-ape6evm-reference.dts +++ b/arch/arm/boot/dts/r8a73a4-ape6evm-reference.dts @@ -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% */ +}; diff --git a/arch/arm/mach-shmobile/board-ape6evm-reference.c b/arch/arm/mach-shmobile/board-ape6evm-reference.c index c828874947ba..46b41dec6345 100644 --- a/arch/arm/mach-shmobile/board-ape6evm-reference.c +++ b/arch/arm/mach-shmobile/board-ape6evm-reference.c @@ -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 = { |