Hello.
On 09/26/2013 09:21 PM, Guennadi Liakhovetski wrote:
The Lager board uses a DA9210 voltage regulator to supply DVFS power to the
CA15 cores on the r8a7790 SoC. This patch adds CPUFreq support for that
board using the cpufreq-cpu0 driver.
Signed-off-by: Guennadi Liakhovetski <g.liakhovetski+rene...@gmail.com>
---
v2: added 'status = "okay";' to the i2c bus
arch/arm/boot/dts/r8a7790-lager-reference.dts | 33 ++++++++++++++++++++++++
arch/arm/mach-shmobile/board-lager-reference.c | 4 ++-
2 files changed, 36 insertions(+), 1 deletions(-)
diff --git a/arch/arm/boot/dts/r8a7790-lager-reference.dts
b/arch/arm/boot/dts/r8a7790-lager-reference.dts
index c462ef1..1ce0a97 100644
--- a/arch/arm/boot/dts/r8a7790-lager-reference.dts
+++ b/arch/arm/boot/dts/r8a7790-lager-reference.dts
@@ -43,3 +43,36 @@
};
};
};
+
+&i2c3 {
+ status = "okay";
+ pinctrl-names = "default";
+ pinctrl-0 = <&i2c3_pins>;
+
+ vdd_dvfs: da9210@68 {
ePAPR spec [1] says: "The name of a node should be somewhat generic,
reflecting the function of the device and not its precise programming model."
So I suggest "regulator" instead of "da9210".
+ compatible = "diasemi,da9210";
+ reg = <0x68>;
+
+ regulator-min-microvolt = <900000>;
+ regulator-max-microvolt = <1000000>;
+ regulator-boot-on;
+ regulator-always-on;
+ };
+};
[...]
diff --git a/arch/arm/mach-shmobile/board-lager-reference.c
b/arch/arm/mach-shmobile/board-lager-reference.c
index 1a1a4a8..2bc8bae 100644
--- a/arch/arm/mach-shmobile/board-lager-reference.c
+++ b/arch/arm/mach-shmobile/board-lager-reference.c
[...]
@@ -29,7 +30,8 @@ static void __init lager_add_standard_devices(void)
r8a7790_clock_init();
r8a7790_add_dt_devices();
- of_platform_populate(NULL, of_default_bus_match_table, NULL, NULL);
+ of_platform_populate(NULL, of_default_bus_match_table, NULL, NULL);
Hm, "drove-by" cleanup?
+ platform_device_register_simple("cpufreq-cpu0", -1, NULL, 0);
}
static const char *lager_boards_compat_dt[] __initdata = {
Shouldn't the patch be split into .dts and .c parts, I wonder?
[1] http://www.power.org/resources/downloads/Power_ePAPR_APPROVED_v1.0.pdf
WBR, Sergei
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