linux-kernel - [PATCH] ARM: dts: stm32: Describe M24C32-D write-lockable page in DH STM32MP13xx DHCOR SoM DT

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Message-ID: <20241017190404.130838-1-marex@denx.de>
Date: Thu, 17 Oct 2024 21:03:57 +0200
From: Marek Vasut <marex@...x.de>
To: linux-arm-kernel@...ts.infradead.org
Cc: Marek Vasut <marex@...x.de>,
	Alexandre Torgue <alexandre.torgue@...s.st.com>,
	Christoph Niedermaier <cniedermaier@...electronics.com>,
	Conor Dooley <conor+dt@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Maxime Coquelin <mcoquelin.stm32@...il.com>,
	Rob Herring <robh@...nel.org>,
	devicetree@...r.kernel.org,
	kernel@...electronics.com,
	linux-kernel@...r.kernel.org,
	linux-stm32@...md-mailman.stormreply.com
Subject: [PATCH] ARM: dts: stm32: Describe M24C32-D write-lockable page in DH STM32MP13xx DHCOR SoM DT

The STM32MP13xx DHCOR SoM is populated with M24256E EEPROM which has
Additional Write lockable page at separate I2C address. Describe the
page in DT to make it available.

Note that the WLP page on this device is hardware write-protected by
R37 which pulls the nWC signal high to VDD_3V3_1V8 power rail.

Signed-off-by: Marek Vasut <marex@...x.de>
---
Cc: Alexandre Torgue <alexandre.torgue@...s.st.com>
Cc: Christoph Niedermaier <cniedermaier@...electronics.com>
Cc: Conor Dooley <conor+dt@...nel.org>
Cc: Krzysztof Kozlowski <krzk+dt@...nel.org>
Cc: Maxime Coquelin <mcoquelin.stm32@...il.com>
Cc: Rob Herring <robh@...nel.org>
Cc: devicetree@...r.kernel.org
Cc: kernel@...electronics.com
Cc: linux-arm-kernel@...ts.infradead.org
Cc: linux-kernel@...r.kernel.org
Cc: linux-stm32@...md-mailman.stormreply.com
---
DEPENDS:
- https://lore.kernel.org/linux-i2c/20241017184152.128395-1-marex@denx.de/
- https://lore.kernel.org/linux-i2c/20241017184152.128395-2-marex@denx.de/
---
 arch/arm/boot/dts/st/stm32mp13xx-dhcor-som.dtsi | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/arch/arm/boot/dts/st/stm32mp13xx-dhcor-som.dtsi b/arch/arm/boot/dts/st/stm32mp13xx-dhcor-som.dtsi
index 5c633ed548f37..07133bd82efa6 100644
--- a/arch/arm/boot/dts/st/stm32mp13xx-dhcor-som.dtsi
+++ b/arch/arm/boot/dts/st/stm32mp13xx-dhcor-som.dtsi
@@ -202,6 +202,12 @@ eeprom0: eeprom@50 {
 		pagesize = <64>;
 	};
 
+	eeprom0wl: eeprom@58 {
+		compatible = "st,24256e-wl";	/* ST M24256E WL page of 0x50 */
+		pagesize = <64>;
+		reg = <0x58>;
+	};
+
 	rv3032: rtc@51 {
 		compatible = "microcrystal,rv3032";
 		reg = <0x51>;
-- 
2.45.2