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authorLinus Torvalds <torvalds@linux-foundation.org>2019-05-09 14:41:55 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2019-05-09 14:41:55 -0700
commit45182e4e1f8ac04708ca7508c51d9103f07d81ab (patch)
treeec8e7131c686bfec6cdd8a7ba6757d5b8fef22bb /Documentation/devicetree/bindings/i2c/i2c-stm32.txt
parent06cbd26d312edfe4a83ff541c23f8f866265eb24 (diff)
parente6ae3ca27477226eae77cc00d5fad89d7ce64aea (diff)
Merge branch 'i2c/for-5.2' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux
Pull i2c updates from Wolfram Sang: - API for late atomic transfers (e.g. to shut down via PMIC). We have a seperate callback now which is called under clearly defined conditions. In-kernel users are converted, too. - new driver for the AMD PCIe MP2 I2C controller - large refactoring for at91 and bcm-iproc (both gain slave support due to this) - and a good share of various driver improvements anf fixes * 'i2c/for-5.2' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux: (57 commits) dt-bindings: i2c: riic: document r7s9210 support i2c: imx-lpi2c: Use __maybe_unused instead of #if CONFIG_PM_SLEEP i2c-piix4: Add Hygon Dhyana SMBus support i2c: core: apply 'is_suspended' check for SMBus, too i2c: core: ratelimit 'transfer when suspended' errors i2c: iproc: Change driver to use 'BIT' macro i2c: riic: Add Runtime PM support i2c: mux: demux-pinctrl: use struct_size() in devm_kzalloc() i2c: mux: pca954x: allow management of device idle state via sysfs i2c: mux: pca9541: remove support for unused platform data i2c: mux: pca954x: remove support for unused platform data dt-bindings: i2c: i2c-mtk: add support for MT8516 i2c: axxia: use auto cmd for last message i2c: gpio: flag atomic capability if possible i2c: algo: bit: add flag to whitelist atomic transfers i2c: stu300: use xfer_atomic callback to bail out early i2c: ocores: enable atomic xfers i2c: ocores: refactor setup for polling i2c: tegra-bpmp: convert to use new atomic callbacks i2c: omap: Add the master_xfer_atomic hook ...
Diffstat (limited to 'Documentation/devicetree/bindings/i2c/i2c-stm32.txt')
-rw-r--r--Documentation/devicetree/bindings/i2c/i2c-stm32.txt37
1 files changed, 19 insertions, 18 deletions
diff --git a/Documentation/devicetree/bindings/i2c/i2c-stm32.txt b/Documentation/devicetree/bindings/i2c/i2c-stm32.txt
index 69240e189b01..f334738f7a35 100644
--- a/Documentation/devicetree/bindings/i2c/i2c-stm32.txt
+++ b/Documentation/devicetree/bindings/i2c/i2c-stm32.txt
@@ -1,11 +1,11 @@
* I2C controller embedded in STMicroelectronics STM32 I2C platform
-Required properties :
-- compatible : Must be one of the following
+Required properties:
+- compatible: Must be one of the following
- "st,stm32f4-i2c"
- "st,stm32f7-i2c"
-- reg : Offset and length of the register set for the device
-- interrupts : Must contain the interrupt id for I2C event and then the
+- reg: Offset and length of the register set for the device
+- interrupts: Must contain the interrupt id for I2C event and then the
interrupt id for I2C error.
- resets: Must contain the phandle to the reset controller.
- clocks: Must contain the input clock of the I2C instance.
@@ -14,25 +14,26 @@ Required properties :
- #address-cells = <1>;
- #size-cells = <0>;
-Optional properties :
-- clock-frequency : Desired I2C bus clock frequency in Hz. If not specified,
+Optional properties:
+- clock-frequency: Desired I2C bus clock frequency in Hz. If not specified,
the default 100 kHz frequency will be used.
For STM32F4 SoC Standard-mode and Fast-mode are supported, possible values are
100000 and 400000.
- For STM32F7 SoC, Standard-mode, Fast-mode and Fast-mode Plus are supported,
- possible values are 100000, 400000 and 1000000.
-- i2c-scl-rising-time-ns : Only for STM32F7, I2C SCL Rising time for the board
- (default: 25)
-- i2c-scl-falling-time-ns : Only for STM32F7, I2C SCL Falling time for the board
- (default: 10)
+ For STM32F7, STM32H7 and STM32MP1 SoCs, Standard-mode, Fast-mode and Fast-mode
+ Plus are supported, possible values are 100000, 400000 and 1000000.
+- i2c-scl-rising-time-ns: I2C SCL Rising time for the board (default: 25)
+ For STM32F7, STM32H7 and STM32MP1 only.
+- i2c-scl-falling-time-ns: I2C SCL Falling time for the board (default: 10)
+ For STM32F7, STM32H7 and STM32MP1 only.
I2C Timings are derived from these 2 values
-- st,syscfg-fmp: Only for STM32F7, use to set Fast Mode Plus bit within SYSCFG
- whether Fast Mode Plus speed is selected by slave.
- 1st cell : phandle to syscfg
- 2nd cell : register offset within SYSCFG
- 3rd cell : register bitmask for FMP bit
+- st,syscfg-fmp: Use to set Fast Mode Plus bit within SYSCFG when Fast Mode
+ Plus speed is selected by slave.
+ 1st cell: phandle to syscfg
+ 2nd cell: register offset within SYSCFG
+ 3rd cell: register bitmask for FMP bit
+ For STM32F7, STM32H7 and STM32MP1 only.
-Example :
+Example:
i2c@40005400 {
compatible = "st,stm32f4-i2c";