diff --git a/Documentation/devicetree/bindings/i2c/i2c-davinci.txt b/Documentation/devicetree/bindings/i2c/i2c-davinci.txt index a4e1cbc810c1..5b123e0e4cc2 100644 --- a/Documentation/devicetree/bindings/i2c/i2c-davinci.txt +++ b/Documentation/devicetree/bindings/i2c/i2c-davinci.txt @@ -1,10 +1,10 @@ -* Texas Instruments Davinci I2C +* Texas Instruments Davinci/Keystone I2C This file provides information, what the device node for the -davinci i2c interface contain. +davinci/keystone i2c interface contains. Required properties: -- compatible: "ti,davinci-i2c"; +- compatible: "ti,davinci-i2c" or "ti,keystone-i2c"; - reg : Offset and length of the register set for the device Recommended properties : diff --git a/drivers/i2c/busses/i2c-davinci.c b/drivers/i2c/busses/i2c-davinci.c index 3fbb9a035532..c5628a42170a 100644 --- a/drivers/i2c/busses/i2c-davinci.c +++ b/drivers/i2c/busses/i2c-davinci.c @@ -181,6 +181,7 @@ static void i2c_davinci_calc_clk_dividers(struct davinci_i2c_dev *dev) u32 clkh; u32 clkl; u32 input_clock = clk_get_rate(dev->clk); + struct device_node *of_node = dev->dev->of_node; /* NOTE: I2C Clock divider programming info * As per I2C specs the following formulas provide prescaler @@ -196,6 +197,9 @@ static void i2c_davinci_calc_clk_dividers(struct davinci_i2c_dev *dev) * where if PSC == 0, d = 7, * if PSC == 1, d = 6 * if PSC > 1 , d = 5 + * + * Note: + * d is always 6 on Keystone I2C controller */ /* get minimum of 7 MHz clock, but max of 12 MHz */ @@ -204,6 +208,9 @@ static void i2c_davinci_calc_clk_dividers(struct davinci_i2c_dev *dev) psc++; /* better to run under spec than over */ d = (psc >= 2) ? 5 : 7 - psc; + if (of_node && of_device_is_compatible(of_node, "ti,keystone-i2c")) + d = 6; + clk = ((input_clock / (psc + 1)) / (pdata->bus_freq * 1000)); /* Avoid driving the bus too fast because of rounding errors above */ if (input_clock / (psc + 1) / clk > pdata->bus_freq * 1000) @@ -726,6 +733,7 @@ static struct i2c_algorithm i2c_davinci_algo = { static const struct of_device_id davinci_i2c_of_match[] = { {.compatible = "ti,davinci-i2c", }, + {.compatible = "ti,keystone-i2c", }, {}, }; MODULE_DEVICE_TABLE(of, davinci_i2c_of_match);