[PATCH 15/25] ARM: dts: s5pv210: add RTC 32 KHz clock in Torbreck

From: Krzysztof Kozlowski
Date: Mon Sep 07 2020 - 12:19:39 EST


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 dtbs_check warnings:

rtc@e2800000: clocks: [[2, 145]] is too short
rtc@e2800000: clock-names: ['rtc'] is too short

Signed-off-by: Krzysztof Kozlowski <krzk@xxxxxxxxxx>
---
arch/arm/boot/dts/s5pv210-torbreck.dts | 9 +++++++++
1 file changed, 9 insertions(+)

diff --git a/arch/arm/boot/dts/s5pv210-torbreck.dts b/arch/arm/boot/dts/s5pv210-torbreck.dts
index cd25e72ccd84..e18259737684 100644
--- a/arch/arm/boot/dts/s5pv210-torbreck.dts
+++ b/arch/arm/boot/dts/s5pv210-torbreck.dts
@@ -30,6 +30,13 @@
device_type = "memory";
reg = <0x20000000 0x20000000>;
};
+
+ pmic_ap_clk: clock-0 {
+ /* Workaround for missing PMIC and its clock */
+ compatible = "fixed-clock";
+ #clock-cells = <0>;
+ clock-frequency = <32768>;
+ };
};

&xusbxti {
@@ -54,6 +61,8 @@

&rtc {
status = "okay";
+ clocks = <&clocks CLK_RTC>, <&pmic_ap_clk>;
+ clock-names = "rtc", "rtc_src";
};

&sdhci0 {
--
2.17.1