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| author | Fabrice Gasnier <fabrice.gasnier@st.com> | 2019-04-13 11:32:54 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-04-25 19:43:12 +0200 |
| commit | 4f4cb173d811ba37aab3048b70583b6c73803d42 (patch) | |
| tree | 4891226cf0f13470eb984911600e1cccfcba2371 | |
| parent | da75b8909756160b8e785104ba421a20b756c975 (diff) | |
| download | linux-stable-4f4cb173d811ba37aab3048b70583b6c73803d42.tar.gz linux-stable-4f4cb173d811ba37aab3048b70583b6c73803d42.tar.bz2 linux-stable-4f4cb173d811ba37aab3048b70583b6c73803d42.zip | |
dt-bindings: nvmem: Add STM32 factory-programmed romem
Add documentation for STMicroelectronics STM32 Factory-programmed
read only memory area.
Signed-off-by: Fabrice Gasnier <fabrice.gasnier@st.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | Documentation/devicetree/bindings/nvmem/st,stm32-romem.txt | 31 |
1 files changed, 31 insertions, 0 deletions
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 000000000000..142a51d5a9be --- /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>; + }; + ... + }; |