This patch enables the use of the generic cpufreq-cpu0 driver on kzm9g.
Providing a regulator and a list of OPPs in DT, combined with a clock,
attached to the cpu0 device is everything, the cpufreq-cpu0 driver needs.
Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@xxxxxx>
---
arch/arm/boot/dts/sh73a0-kzm9g-reference.dts | 19 ++++++++++++++++---
arch/arm/mach-shmobile/Kconfig | 2 ++
2 files changed, 18 insertions(+), 3 deletions(-)
diff --git a/arch/arm/boot/dts/sh73a0-kzm9g-reference.dts b/arch/arm/boot/dts/sh73a0-kzm9g-reference.dts
index d9f6c18..ebe3f49 100644
--- a/arch/arm/boot/dts/sh73a0-kzm9g-reference.dts
+++ b/arch/arm/boot/dts/sh73a0-kzm9g-reference.dts
@@ -18,6 +18,19 @@
model = "KZM-A9-GT";
compatible = "renesas,kzm9g-reference", "renesas,sh73a0";
+ cpus {
+ cpu@0 {
+ cpu0-supply = <&vdd_dvfs>;
+ operating-points = <
+ /* kHz uV */
+ 1196000 1315000
+ 806000 1175000
+ 403000 1065000
+ >;
+ voltage-tolerance = <1>; /* 1% */
+ };
+ };
+
chosen {
bootargs = "console=tty0 console=ttySC4,115200 root=/dev/nfs ip=dhcp ignore_loglevel earlyprintk=sh-sci.4,115200";
};
@@ -118,10 +131,10 @@
reg = <0x40>;
regulators {
- sd1 {
+ vdd_dvfs: sd1 {
regulator-name = "1.315V CPU";
- regulator-min-microvolt = <1315000>;
- regulator-max-microvolt = <1335000>;
+ regulator-min-microvolt = <1050000>;
+ regulator-max-microvolt = <1350000>;
regulator-always-on;
regulator-boot-on;
};
diff --git a/arch/arm/mach-shmobile/Kconfig b/arch/arm/mach-shmobile/Kconfig
index 927eecc..6f621ac 100644
--- a/arch/arm/mach-shmobile/Kconfig
+++ b/arch/arm/mach-shmobile/Kconfig
@@ -141,6 +141,8 @@ config MACH_KZM9G
config MACH_KZM9G_REFERENCE
bool "KZM-A9-GT board - Reference Device Tree Implementation"
depends on ARCH_SH73A0
+ select ARCH_HAS_CPUFREQ
+ select ARCH_HAS_OPP
select ARCH_REQUIRE_GPIOLIB
select REGULATOR_FIXED_VOLTAGE if REGULATOR
select SND_SOC_AK4642 if SND_SIMPLE_CARD
--
1.7.2.5
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