From: Phil Edworthy <phil.edwor...@renesas.com> The driver requires an undocumented clock property, so detail it. Add documentation for a separate, optional, bus clock.
Signed-off-by: Phil Edworthy <phil.edwor...@renesas.com> v3: - Changed clocks and clock-names sections to use term "peripheral clock" (pclk) instead of "bus clock" (busclk). v2: - No changes. v1: - Reviewed-by: Rob Herring <r...@kernel.org> --- Documentation/devicetree/bindings/i2c/i2c-designware.txt | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/Documentation/devicetree/bindings/i2c/i2c-designware.txt b/Documentation/devicetree/bindings/i2c/i2c-designware.txt index 3e4bcc2..f94aa59 100644 --- a/Documentation/devicetree/bindings/i2c/i2c-designware.txt +++ b/Documentation/devicetree/bindings/i2c/i2c-designware.txt @@ -6,12 +6,21 @@ Required properties : 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. + - clocks : phandles for the clocks, see the description of clock-names below. + The phandle for the "ic_clk" clock is required. The phandle for the "pclk" + clock is optional. If a single clock is specified but no clock-name, it is + the "ic_clk" clock. If both clocks are listed, the "ic_clk" must be first. Recommended properties : - clock-frequency : desired I2C bus clock frequency in Hz. Optional properties : + + - clock-names : Contains the names of the clocks: + "ic_clk", for the core clock used to generate the external I2C clock. + "pclk", the peripheral clock, required for register accesses. + - reg : for "mscc,ocelot-i2c", a second register set to configure the SDA hold time, named ICPU_CFG:TWI_DELAY in the datasheet. -- 2.7.4