This sets the bus to run at 400kHz, prior to this, the bus frequency was undefined.
Cc: Linux I2C <[email protected]> Cc: Detlev Zundel <[email protected]> Cc: Fabio Estevam <[email protected]> Cc: Stefano Babic <[email protected]> Cc: Wolfgang Denk <[email protected]> Cc: Wolfram Sang <[email protected]> --- drivers/i2c/busses/i2c-mxs.c | 10 ++++++++++ 1 file changed, 10 insertions(+) diff --git a/drivers/i2c/busses/i2c-mxs.c b/drivers/i2c/busses/i2c-mxs.c index 3d471d5..0d8e485 100644 --- a/drivers/i2c/busses/i2c-mxs.c +++ b/drivers/i2c/busses/i2c-mxs.c @@ -43,6 +43,10 @@ #define MXS_I2C_CTRL0_DIRECTION 0x00010000 #define MXS_I2C_CTRL0_XFER_COUNT(v) ((v) & 0x0000FFFF) +#define MXS_I2C_TIMING0 (0x10) +#define MXS_I2C_TIMING1 (0x20) +#define MXS_I2C_TIMING2 (0x30) + #define MXS_I2C_CTRL1 (0x40) #define MXS_I2C_CTRL1_SET (0x44) #define MXS_I2C_CTRL1_CLR (0x48) @@ -118,6 +122,12 @@ struct mxs_i2c_dev { static void mxs_i2c_reset(struct mxs_i2c_dev *i2c) { mxs_reset_block(i2c->regs); + + /* I2C is running at 400kHz */ + writel(0x000f0007, i2c->regs + MXS_I2C_TIMING0); + writel(0x001f000f, i2c->regs + MXS_I2C_TIMING1); + writel(0x0015000d, i2c->regs + MXS_I2C_TIMING2); + writel(MXS_I2C_IRQ_MASK << 8, i2c->regs + MXS_I2C_CTRL1_SET); writel(MXS_I2C_QUEUECTRL_PIO_QUEUE_MODE, i2c->regs + MXS_I2C_QUEUECTRL_SET); -- 1.7.10 -- To unsubscribe from this list: send the line "unsubscribe linux-i2c" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
