On Wed, Jun 22, 2016 at 04:55:26PM +0800, Pan Wen wrote: > add Hisilicon BVT I2C controller driver support. > > Signed-off-by: Pan Wen <wenpan@xxxxxxxxxxxxx> > --- > .../devicetree/bindings/i2c/i2c-hibvt.txt | 24 + > drivers/i2c/busses/Kconfig | 10 + > drivers/i2c/busses/Makefile | 1 + > drivers/i2c/busses/i2c-hibvt.c | 736 +++++++++++++++++++++ > 4 files changed, 771 insertions(+) > create mode 100644 Documentation/devicetree/bindings/i2c/i2c-hibvt.txt > create mode 100644 drivers/i2c/busses/i2c-hibvt.c > > diff --git a/Documentation/devicetree/bindings/i2c/i2c-hibvt.txt b/Documentation/devicetree/bindings/i2c/i2c-hibvt.txt > new file mode 100644 > index 0000000..3aa2cee > --- /dev/null > +++ b/Documentation/devicetree/bindings/i2c/i2c-hibvt.txt > @@ -0,0 +1,24 @@ > +Hisilicon BVT I2C master controller > + > +Required properties: > +- compatible: should be "hisilicon,hibvt-i2c". > +- reg: physical base address of the controller and length of memory mapped. > + region. > +- interrupts: interrupt number to the cpu. > +- clocks: phandles to input clocks. > + > +Optional properties: > +- clock-frequency: Desired I2C bus frequency in Hz, otherwise defaults to 100000. > + > +Other properties: > +see Documentation/devicetree/bindings/i2c/i2c.txt. > + > +Examples: > +i2c_bus0: i2c@12110000 { > + compatible = "hisilicon,hibvt-i2c"; > + reg = <0x12110000 0x100>; > + interrupts = <20>; > + clocks = <&crg_ctrl HI3516CV300_APB_CLK>; > + clock-names = "apb_pclk"; > + clock-frequency = <100000>; > +}; The clock-names property was not described above, and the driver doesn't appear to use it. Please explciitly describe the clock-names you expect, and use them in the driver. If there is a single clock, then you can simply drop the clock-names property from the example. Thanks, Mark. > + i2c->clk = devm_clk_get(&pdev->dev, NULL); > + if (IS_ERR(i2c->clk)) { > + dev_err(i2c->dev, "cannot get clock\n"); > + return -ENOENT; > + } > + clk_prepare_enable(i2c->clk); -- 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