[PATCH 04/13] ARM: dts: exynos: Correct S3C RTC bindings in SMDK5410

[Krzysztof Kozlowski]

The S3C RTC requires 32768 Hz clock as input which is provided by PMIC.
However the PMIC is not described in DTS at all so at least add
a workaround to model its clock with a fixed-clock.  This fixes S3C RTC
and silences dtbs_check warnings like:

  arch/arm/boot/dts/exynos5410-smdk5410.dt.yaml: rtc at 101e0000: clocks: [[5, 317]] is too short
  arch/arm/boot/dts/exynos5410-smdk5410.dt.yaml: rtc at 101e0000: clock-names: ['rtc'] is too short

Signed-off-by: Krzysztof Kozlowski <krzk at kernel.org>
---
 arch/arm/boot/dts/exynos5410-smdk5410.dts | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/arch/arm/boot/dts/exynos5410-smdk5410.dts b/arch/arm/boot/dts/exynos5410-smdk5410.dts
index 5282b5deca86..2a3ade77a2de 100644
--- a/arch/arm/boot/dts/exynos5410-smdk5410.dts
+++ b/arch/arm/boot/dts/exynos5410-smdk5410.dts
@@ -29,6 +29,13 @@
 		#clock-cells = <0>;
 	};
 
+	pmic_ap_clk: pmic-ap-clk {
+		/* Workaround for missing PMIC and its clock */
+		compatible = "fixed-clock";
+		#clock-cells = <0>;
+		clock-frequency = <32768>;
+	};
+
 	firmware at 2037000 {
 		compatible = "samsung,secure-firmware";
 		reg = <0x02037000 0x1000>;
@@ -79,6 +86,11 @@
 	};
 };
 
+&rtc {
+	clocks = <&clock CLK_RTC>, <&pmic_ap_clk>;
+	clock-names = "rtc", "rtc_src";
+};
+
 &sromc {
 	pinctrl-names = "default";
 	pinctrl-0 = <&srom_ctl>, <&srom_ebi>;
-- 
2.17.1