linux-kernel - [PATCH 3/3] ARM: dts: stm32: add ADC analog switches syscfg on stm32mp157c

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Message-ID: <1560324276-681-4-git-send-email-fabrice.gasnier@st.com>
Date:   Wed, 12 Jun 2019 09:24:36 +0200
From:   Fabrice Gasnier <fabrice.gasnier@...com>
To:     <jic23@...nel.org>, <robh+dt@...nel.org>, <alexandre.torgue@...com>
CC:     <mark.rutland@....com>, <mcoquelin.stm32@...il.com>,
        <lars@...afoo.de>, <knaack.h@....de>, <pmeerw@...erw.net>,
        <fabrice.gasnier@...com>, <linux-iio@...r.kernel.org>,
        <devicetree@...r.kernel.org>,
        <linux-stm32@...md-mailman.stormreply.com>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>
Subject: [PATCH 3/3] ARM: dts: stm32: add ADC analog switches syscfg on stm32mp157c

On stm32mp157c, the ADC inputs are multiplexed with analog switches which
have reduced performances when their supply is below 2.7V (vdda by
default).
Add syscfg registers that can be used on stm32mp157c, to get full ADC
analog performances.

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

diff --git a/arch/arm/boot/dts/stm32mp157c.dtsi b/arch/arm/boot/dts/stm32mp157c.dtsi
index 2afeee6..64d71c9 100644
--- a/arch/arm/boot/dts/stm32mp157c.dtsi
+++ b/arch/arm/boot/dts/stm32mp157c.dtsi
@@ -856,6 +856,7 @@
 			clocks = <&rcc ADC12>, <&rcc ADC12_K>;
 			clock-names = "bus", "adc";
 			interrupt-controller;
+			st,syscfg = <&syscfg>;
 			#interrupt-cells = <1>;
 			#address-cells = <1>;
 			#size-cells = <0>;
-- 
2.7.4