[PATCH 32/33] ARM: dts: exynos: Correct S3C RTC bindings in Tiny4412

[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 fixed-clock.  This fixes S3C RTC and
silences dtbs_check warnings like:

  arch/arm/boot/dts/exynos4412-tiny4412.dt.yaml: rtc@10070000: clocks: [[7, 
346]] is too short
  arch/arm/boot/dts/exynos4412-tiny4412.dt.yaml: rtc@10070000: clock-names: 
['rtc'] is too short

Signed-off-by: Krzysztof Kozlowski <k...@kernel.org>
---
 arch/arm/boot/dts/exynos4412-tiny4412.dts | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/arch/arm/boot/dts/exynos4412-tiny4412.dts 
b/arch/arm/boot/dts/exynos4412-tiny4412.dts
index 7512c86e634e..017b26108bb0 100644
--- a/arch/arm/boot/dts/exynos4412-tiny4412.dts
+++ b/arch/arm/boot/dts/exynos4412-tiny4412.dts
@@ -65,6 +65,13 @@
                        compatible = "samsung,clock-xusbxti";
                        clock-frequency = <24000000>;
                };
+
+               pmic_ap_clk: pmic-ap-clk {
+                       /* Workaround for missing clock on PMIC */
+                       compatible = "fixed-clock";
+                       #clock-cells = <0>;
+                       clock-frequency = <32768>;
+               };
        };
 
        panel {
@@ -110,6 +117,8 @@
 
 &rtc {
        status = "okay";
+       clocks = <&clock CLK_RTC>, <&pmic_ap_clk>;
+       clock-names = "rtc", "rtc_src";
 };
 
 &sdhci_2 {
-- 
2.17.1