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From: Fabrice Gasnier <fabrice.gasnier@st.com>
To: <srinivas.kandagatla@linaro.org>, <robh+dt@kernel.org>,
	<alexandre.torgue@st.com>
Cc: <mark.rutland@arm.com>, <mcoquelin.stm32@gmail.com>,
	<fabrice.gasnier@st.com>, <lionel.debieve@st.com>,
	<devicetree@vger.kernel.org>,
	<linux-stm32@st-md-mailman.stormreply.com>,
	<linux-arm-kernel@lists.infradead.org>,
	<linux-kernel@vger.kernel.org>
Subject: [PATCH v2 1/6] dt-bindings: nvmem: Add STM32 factory-programmed romem
Date: Thu, 28 Feb 2019 11:19:51 +0100	[thread overview]
Message-ID: <1551349196-8956-2-git-send-email-fabrice.gasnier@st.com> (raw)
In-Reply-To: <1551349196-8956-1-git-send-email-fabrice.gasnier@st.com>

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


  reply	other threads:[~2019-02-28 10:21 UTC|newest]

Thread overview: 10+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-02-28 10:19 [PATCH v2 0/6] Add nvmem support on STM32 Fabrice Gasnier
2019-02-28 10:19 ` Fabrice Gasnier [this message]
2019-03-12 16:12   ` [PATCH v2 1/6] dt-bindings: nvmem: Add STM32 factory-programmed romem Rob Herring
2019-02-28 10:19 ` [PATCH v2 2/6] nvmem: Add driver for STM32 factory-programmed read only mem Fabrice Gasnier
2019-02-28 10:19 ` [PATCH v2 3/6] nvmem: stm32: add support for STM32MP15 BSEC to control OTP data Fabrice Gasnier
2019-02-28 10:19 ` [PATCH v2 4/6] nvmem: core: add nvmem_cell_read_u16 Fabrice Gasnier
2019-02-28 10:19 ` [PATCH v2 5/6] ARM: dts: stm32: Add romem and temperature calibration on stm32mp157c Fabrice Gasnier
2019-02-28 10:19 ` [PATCH v2 6/6] ARM: dts: stm32: Add romem and temperature calibration on stm32f429 Fabrice Gasnier
2019-03-20 14:25 ` [PATCH v2 0/6] Add nvmem support on STM32 Srinivas Kandagatla
2019-03-26 12:27 ` Alexandre Torgue

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