[PATCH] ARM: dts: stm32: Update part number NVMEM description on stm32mp131

[Patrick Delaunay]

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 at foss.st.com>
---

 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 f50051e81ee3..2f186a0ae92e 100644
--- a/arch/arm/boot/dts/stm32mp131.dtsi
+++ b/arch/arm/boot/dts/stm32mp131.dtsi
@@ -1233,6 +1233,7 @@ bsec: efuse at 5c005000 {
 
 			part_number_otp: part_number_otp at 4 {
 				reg = <0x4 0x2>;
+				bits = <0 12>;
 			};
 			ts_cal1: calib at 5c {
 				reg = <0x5c 0x2>;
-- 
2.25.1