From 205cbe7ff26f4e5a8312858066bc36370dc28553 Mon Sep 17 00:00:00 2001
From: Patrick Delaunay <patrick.delaunay@foss.st.com>
Date: Wed, 18 Jan 2023 13:49:51 +0100
Subject: [PATCH] ARM: dts: stm32: Update part number NVMEM description on
 stm32mp131

[ Upstream commit 366384e495511bea8583e44173629a3012d62db0 ]

The STM32MP13x Device Part Number (also named RPN in reference manual)
only uses the first 12 bits in OTP4, all the other bit are reserved and
they can be different of zero; they must be masked in NVMEM result, so
the number of bits must be defined in the nvmem cell description.

Fixes: 1da8779c0029 ("ARM: dts: stm32: add STM32MP13 SoCs support")
Signed-off-by: Patrick Delaunay <patrick.delaunay@foss.st.com>
Signed-off-by: Alexandre Torgue <alexandre.torgue@foss.st.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 arch/arm/boot/dts/stm32mp131.dtsi | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/arm/boot/dts/stm32mp131.dtsi b/arch/arm/boot/dts/stm32mp131.dtsi
index accc3824f7e9..99d88096959e 100644
--- a/arch/arm/boot/dts/stm32mp131.dtsi
+++ b/arch/arm/boot/dts/stm32mp131.dtsi
@@ -527,6 +527,7 @@ bsec: efuse@5c005000 {
 
 			part_number_otp: part_number_otp@4 {
 				reg = <0x4 0x2>;
+				bits = <0 12>;
 			};
 			ts_cal1: calib@5c {
 				reg = <0x5c 0x2>;