diff options
Diffstat (limited to 'drivers/i2c/omap24xx_i2c.c')
| -rw-r--r-- | drivers/i2c/omap24xx_i2c.c | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/drivers/i2c/omap24xx_i2c.c b/drivers/i2c/omap24xx_i2c.c index 4427938ff3..678460325d 100644 --- a/drivers/i2c/omap24xx_i2c.c +++ b/drivers/i2c/omap24xx_i2c.c @@ -109,7 +109,11 @@ static int i2c_read_byte (u8 devaddr, u8 regoffset, u8 * value) status = wait_for_pin (); if (status & I2C_STAT_RRDY) { +#if defined(CONFIG_OMAP243X) || defined(CONFIG_OMAP34XX) + *value = readb (I2C_DATA); +#else *value = readw (I2C_DATA); +#endif udelay (20000); } else { i2c_error = 1; @@ -150,8 +154,23 @@ static int i2c_write_byte (u8 devaddr, u8 regoffset, u8 value) status = wait_for_pin (); if (status & I2C_STAT_XRDY) { +#if defined(CONFIG_OMAP243X) || defined(CONFIG_OMAP34XX) + /* send out 1 byte */ + writeb (regoffset, I2C_DATA); + writew (I2C_STAT_XRDY, I2C_STAT); + + status = wait_for_pin (); + if ((status & I2C_STAT_XRDY)) { + /* send out next 1 byte */ + writeb (value, I2C_DATA); + writew (I2C_STAT_XRDY, I2C_STAT); + } else { + i2c_error = 1; + } +#else /* send out two bytes */ writew ((value << 8) + regoffset, I2C_DATA); +#endif /* must have enough delay to allow BB bit to go low */ udelay (50000); if (readw (I2C_STAT) & I2C_STAT_NACK) { @@ -188,7 +207,11 @@ static void flush_fifo(void) while(1){ stat = readw(I2C_STAT); if(stat == I2C_STAT_RRDY){ +#if defined(CONFIG_OMAP243X) || defined(CONFIG_OMAP34XX) + readb(I2C_DATA); +#else readw(I2C_DATA); +#endif writew(I2C_STAT_RRDY,I2C_STAT); udelay(1000); }else |