[PATCH v4 3/3] ARM: shmobile: kzm9g-reference: add CPUFreq support

[Guennadi Liakhovetski]

This patch enables the use of the generic cpufreq-cpu0 driver on kzm9g.
Providing a regulator, a list of OPPs in DT, combined with a virtual
cpufreq-cpu0 platform device and a clock, attached to it is everything,
the cpufreq-cpu0 driver needs.

Signed-off-by: Guennadi Liakhovetski <g.liakhovetski+renesas at gmail.com>
---

v4: add a cpufreq-cpu0 platform device for the new cpufreq-cpu0 
initialisation procedure

 arch/arm/boot/dts/sh73a0-kzm9g-reference.dts |    6 +++---
 arch/arm/mach-shmobile/Kconfig               |    2 ++
 arch/arm/mach-shmobile/setup-sh73a0.c        |    5 +++++
 3 files changed, 10 insertions(+), 3 deletions(-)

diff --git a/arch/arm/boot/dts/sh73a0-kzm9g-reference.dts b/arch/arm/boot/dts/sh73a0-kzm9g-reference.dts
index dd1cd80..b6f759e 100644
--- a/arch/arm/boot/dts/sh73a0-kzm9g-reference.dts
+++ b/arch/arm/boot/dts/sh73a0-kzm9g-reference.dts
@@ -78,10 +78,10 @@
 		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 eb3a7ff..8a0420b 100644
--- a/arch/arm/mach-shmobile/Kconfig
+++ b/arch/arm/mach-shmobile/Kconfig
@@ -134,6 +134,8 @@ 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
diff --git a/arch/arm/mach-shmobile/setup-sh73a0.c b/arch/arm/mach-shmobile/setup-sh73a0.c
index e8cd93a..0469e84 100644
--- a/arch/arm/mach-shmobile/setup-sh73a0.c
+++ b/arch/arm/mach-shmobile/setup-sh73a0.c
@@ -1016,6 +1016,8 @@ static const struct of_dev_auxdata sh73a0_auxdata_lookup[] __initconst = {
 
 void __init sh73a0_add_standard_devices_dt(void)
 {
+	struct platform_device_info devinfo = { .name = "cpufreq-cpu0", .id = -1, };
+
 	/* clocks are setup late during boot in the case of DT */
 	sh73a0_clock_init();
 
@@ -1023,6 +1025,9 @@ void __init sh73a0_add_standard_devices_dt(void)
 			     ARRAY_SIZE(sh73a0_devices_dt));
 	of_platform_populate(NULL, of_default_bus_match_table,
 			     sh73a0_auxdata_lookup, NULL);
+
+	/* Instantiate cpufreq-cpu0 */
+	platform_device_register_full(&devinfo);
 }
 
 static const char *sh73a0_boards_compat_dt[] __initdata = {
-- 
1.7.2.5