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@xxxxxxxxx>
---
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
--
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