From: Krzysztof Kozlowski <krzk@kernel.org>
Date: Sun, 30 Aug 2020 13:51:59 +0000 (+0200)
Subject: ARM: dts: exynos: Correct S3C RTC bindings in Tiny4412
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=6511f11a49825a3ef0fc6529bee84716d58f3c4d;p=linux.git

ARM: dts: exynos: Correct S3C RTC bindings in Tiny4412

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>
Link: https://lore.kernel.org/r/20200830135200.24304-32-krzk@kernel.org
---

diff --git a/arch/arm/boot/dts/exynos4412-tiny4412.dts b/arch/arm/boot/dts/exynos4412-tiny4412.dts
index 7512c86e634e1..017b26108bb0c 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 {