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

Krzysztof Kozlowski
2020-08-30T14:05:30Z

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 <krzk@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