lkml.org 
[lkml]   [2019]   [Feb]   [28]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH v2 1/6] dt-bindings: nvmem: Add STM32 factory-programmed romem
Date
Add documentation for STMicroelectronics STM32 Factory-programmed
read only memory area.

Signed-off-by: Fabrice Gasnier <fabrice.gasnier@st.com>
---
Changes in v2:
- update "st,stm32f4-otp" compatible as discussed with Rob
---
.../devicetree/bindings/nvmem/st,stm32-romem.txt | 31 ++++++++++++++++++++++
1 file changed, 31 insertions(+)
create mode 100644 Documentation/devicetree/bindings/nvmem/st,stm32-romem.txt

diff --git a/Documentation/devicetree/bindings/nvmem/st,stm32-romem.txt b/Documentation/devicetree/bindings/nvmem/st,stm32-romem.txt
new file mode 100644
index 0000000..142a51d
--- /dev/null
+++ b/Documentation/devicetree/bindings/nvmem/st,stm32-romem.txt
@@ -0,0 +1,31 @@
+STMicroelectronics STM32 Factory-programmed data device tree bindings
+
+This represents STM32 Factory-programmed read only non-volatile area: locked
+flash, OTP, read-only HW regs... This contains various information such as:
+analog calibration data for temperature sensor (e.g. TS_CAL1, TS_CAL2),
+internal vref (VREFIN_CAL), unique device ID...
+
+Required properties:
+- compatible: Should be one of:
+ "st,stm32f4-otp"
+ "st,stm32mp15-bsec"
+- reg: Offset and length of factory-programmed area.
+- #address-cells: Should be '<1>'.
+- #size-cells: Should be '<1>'.
+
+Optional Data cells:
+- Must be child nodes as described in nvmem.txt.
+
+Example on stm32f4:
+ romem: nvmem@1fff7800 {
+ compatible = "st,stm32f4-otp";
+ reg = <0x1fff7800 0x400>;
+ #address-cells = <1>;
+ #size-cells = <1>;
+
+ /* Data cells: ts_cal1 at 0x1fff7a2c */
+ ts_cal1: calib@22c {
+ reg = <0x22c 0x2>;
+ };
+ ...
+ };
--
2.7.4
\
 
 \ /
  Last update: 2019-02-28 11:21    [W:0.194 / U:0.264 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site