linux-kernel - [PATCH] ARM: dts: stm32: Add vrefbuf support to stm32mp157c

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Date:   Wed, 18 Apr 2018 09:47:45 +0200
From:   Fabrice Gasnier <fabrice.gasnier@...com>
To:     <alexandre.torgue@...com>, <robh+dt@...nel.org>
CC:     <mcoquelin.stm32@...il.com>, <mark.rutland@....com>,
        <linux-arm-kernel@...ts.infradead.org>,
        <devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <fabrice.gasnier@...com>
Subject: [PATCH] ARM: dts: stm32: Add vrefbuf support to stm32mp157c

stm32mp157c has vrefbuf regulator that can provide analog reference
voltage from 1500mV to 2500mV.

Signed-off-by: Fabrice Gasnier <fabrice.gasnier@...com>
---
 arch/arm/boot/dts/stm32mp157c.dtsi | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/arch/arm/boot/dts/stm32mp157c.dtsi b/arch/arm/boot/dts/stm32mp157c.dtsi
index bc3eddc..7df3c99 100644
--- a/arch/arm/boot/dts/stm32mp157c.dtsi
+++ b/arch/arm/boot/dts/stm32mp157c.dtsi
@@ -167,6 +167,15 @@
 			#reset-cells = <1>;
 		};
 
+		vrefbuf: vrefbuf@...25000 {
+			compatible = "st,stm32-vrefbuf";
+			reg = <0x50025000 0x8>;
+			regulator-min-microvolt = <1500000>;
+			regulator-max-microvolt = <2500000>;
+			clocks = <&rcc VREF>;
+			status = "disabled";
+		};
+
 		usart1: serial@...00000 {
 			compatible = "st,stm32h7-uart";
 			reg = <0x5c000000 0x400>;
-- 
1.9.1