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authorAlexandre Belloni <alexandre.belloni@bootlin.com>2018-08-31 17:11:11 +0200
committerWolfram Sang <wsa@the-dreams.de>2018-09-02 23:51:15 +0200
commitffbc01bff2ef98430e4ab486b878f04fe7bb7c29 (patch)
tree10c31169372f72d0a1e575b943557a3e41ed9626 /Documentation/devicetree/bindings/i2c
parentc7fa7aeff85cbd71c724e7a7b167c24356de9c5f (diff)
downloadlinux-ffbc01bff2ef98430e4ab486b878f04fe7bb7c29.tar.bz2
dt-bindings: i2c: designware: document MSCC Ocelot bindings
Document bindings for the Microsemi Ocelot integration of the Designware I2C controller. Reviewed-by: Rob Herring <robh@kernel.org> Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
Diffstat (limited to 'Documentation/devicetree/bindings/i2c')
-rw-r--r--Documentation/devicetree/bindings/i2c/i2c-designware.txt7
1 files changed, 6 insertions, 1 deletions
diff --git a/Documentation/devicetree/bindings/i2c/i2c-designware.txt b/Documentation/devicetree/bindings/i2c/i2c-designware.txt
index fbb0a6d8b964..3e4bcc2fb6f7 100644
--- a/Documentation/devicetree/bindings/i2c/i2c-designware.txt
+++ b/Documentation/devicetree/bindings/i2c/i2c-designware.txt
@@ -3,6 +3,7 @@
Required properties :
- compatible : should be "snps,designware-i2c"
+ or "mscc,ocelot-i2c" with "snps,designware-i2c" for fallback
- reg : Offset and length of the register set for the device
- interrupts : <IRQ> where IRQ is the interrupt number.
@@ -11,8 +12,12 @@ Recommended properties :
- clock-frequency : desired I2C bus clock frequency in Hz.
Optional properties :
+ - reg : for "mscc,ocelot-i2c", a second register set to configure the SDA hold
+ time, named ICPU_CFG:TWI_DELAY in the datasheet.
+
- i2c-sda-hold-time-ns : should contain the SDA hold time in nanoseconds.
- This option is only supported in hardware blocks version 1.11a or newer.
+ This option is only supported in hardware blocks version 1.11a or newer and
+ on Microsemi SoCs ("mscc,ocelot-i2c" compatible).
- i2c-scl-falling-time-ns : should contain the SCL falling time in nanoseconds.
This value which is by default 300ns is used to compute the tLOW period.