Commit ebb105b5 authored Sep 07, 2020 by Krzysztof Kozlowski

ARM: dts: s5pv210: add RTC 32 KHz clock in Goni



The S3C RTC requires 32768 Hz clock as input which is provided by PMIC.
However there is no such clock provider but rather a regulator driver
which registers the clock as a regulator.  This is an old driver which
will not be updated so add a workaround - a fixed-clock to fill missing
clock phandle reference in S3C RTC.

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@kernel.org>
Link: https://lore.kernel.org/r/20200907161141.31034-13-krzk@kernel.org

parent 086c4498

arch/arm/boot/dts/s5pv210-goni.dts

+17 −0

Original line number	Diff line number	Diff line
		@@ -33,6 +33,13 @@
		0x50000000 0x08000000>;
		};

		pmic_ap_clk: clock-0 {
		/* Workaround for missing clock on PMIC */
		compatible = "fixed-clock";
		#clock-cells = <0>;
		clock-frequency = <32768>;
		};

		regulators {
		compatible = "simple-bus";
		#address-cells = <1>;
		@@ -224,6 +231,11 @@
		regulator-max-microvolt = <1200000>;
		regulator-always-on;
		};

		ap32khz_reg: EN32KHz-AP {
		regulator-name = "32KHz AP";
		regulator-always-on;
		};
		};
		};
		};
		@@ -308,6 +320,11 @@
		status = "okay";
		};

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

		&sdhci0 {
		bus-width = <4>;
		non-removable;

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