On Oct 14, 2013, at 7:46 AM, Maxime COQUELIN wrote: > This patch adds support to SSC (Synchronous Serial Controller) > I2C driver. This IP also supports SPI protocol, but this is not > the aim of this driver. > > This IP is embedded in all ST SoCs for Set-top box platorms, and > supports I2C Standard and Fast modes. > > Signed-off-by: Maxime Coquelin <maxime.coquelin@xxxxxx> > --- > Documentation/devicetree/bindings/i2c/i2c-st.txt | 38 + > drivers/i2c/busses/Kconfig | 10 + > drivers/i2c/busses/Makefile | 1 + > drivers/i2c/busses/i2c-st.c | 867 ++++++++++++++++++++++ > 4 files changed, 916 insertions(+) > create mode 100644 Documentation/devicetree/bindings/i2c/i2c-st.txt > create mode 100644 drivers/i2c/busses/i2c-st.c > > diff --git a/Documentation/devicetree/bindings/i2c/i2c-st.txt b/Documentation/devicetree/bindings/i2c/i2c-st.txt > new file mode 100644 > index 0000000..8b2fd0b > --- /dev/null > +++ b/Documentation/devicetree/bindings/i2c/i2c-st.txt > @@ -0,0 +1,38 @@ > +ST SSC binding, for I2C mode operation > + > +Required properties : > +- compatible : Must be "st,comms-i2c" > +- reg : Offset and length of the register set for the device > +- interrupts : the interrupt specifier > +- clock-names: Must contain "ssc". > +- clocks: Must contain an entry for each name in clock-names. See the common > + clock bindings. > +- A pinctrl state named "default" must be defined, using the bindings in > + ../pinctrl/pinctrl-binding.txt > + > +Optional properties : > +- clock-frequency : Desired I2C bus clock frequency in Hz. If not specified, > + the default 100 kHz frequency will be used. As only Normal and Fast modes > + are supported, possible values are 100000 and 400000. > +- i2c-min-scl-pulse-width-us : The minimum valid SCL pulse width that is > + allowed through the deglitch circuit. In units of us. > +- i2c-min-sda-pulse-width-us : The minimum valid SDA pulse width that is > + allowed through the deglitch circuit. In units of us. i2c-min... should be vendor prefixed, st,i2c-min... > +- A pinctrl state named "sleep" could be defined, using the bindings in > + ../pinctrl/pinctrl-binding.txt I don't see any reference to "sleep" in pinctrl-binding.txt > + > + > +Example : > + > +i2c0: i2c@fed40000 { > + compatible = "st,comms-ssc-i2c"; > + reg = <0xfed40000 0x110>; > + interrupts = <GIC_SPI 187 IRQ_TYPE_EDGE_RISING>; > + clocks = <&CLK_S_ICN_REG_0>; > + clock-names = "ssc"; > + clock-frequency = <400000>; > + pinctrl-names = "default"; > + pinctrl-0 = <&pinctrl_i2c0_default>; > + i2c-min-scl-pulse-width-us = <0>; > + i2c-min-sda-pulse-width-us = <5>; > +}; - k -- Employee of Qualcomm Innovation Center, Inc. Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum, hosted by The Linux Foundation -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html