diff options
Diffstat (limited to 'drivers/i2c')
| -rw-r--r-- | drivers/i2c/busses/i2c-omap.c | 25 |
1 files changed, 18 insertions, 7 deletions
diff --git a/drivers/i2c/busses/i2c-omap.c b/drivers/i2c/busses/i2c-omap.c index ece0125a1ee..a879e4bf512 100644 --- a/drivers/i2c/busses/i2c-omap.c +++ b/drivers/i2c/busses/i2c-omap.c @@ -343,17 +343,28 @@ static int omap_i2c_init(struct omap_i2c_dev *dev) /* If configured for High Speed */ if (dev->speed > 400) { + unsigned long scl; + /* For first phase of HS mode */ - fsscll = internal_clk / (400 * 2) - 6; - fssclh = internal_clk / (400 * 2) - 6; + scl = internal_clk / 400; + fsscll = scl - (scl / 3) - 7; + fssclh = (scl / 3) - 5; /* For second phase of HS mode */ - hsscll = fclk_rate / (dev->speed * 2) - 6; - hssclh = fclk_rate / (dev->speed * 2) - 6; + scl = fclk_rate / dev->speed; + hsscll = scl - (scl / 3) - 7; + hssclh = (scl / 3) - 5; + } else if (dev->speed > 100) { + unsigned long scl; + + /* Fast mode */ + scl = internal_clk / dev->speed; + fsscll = scl - (scl / 3) - 7; + fssclh = (scl / 3) - 5; } else { - /* To handle F/S modes */ - fsscll = internal_clk / (dev->speed * 2) - 6; - fssclh = internal_clk / (dev->speed * 2) - 6; + /* Standard mode */ + fsscll = internal_clk / (dev->speed * 2) - 7; + fssclh = internal_clk / (dev->speed * 2) - 5; } scll = (hsscll << OMAP_I2C_SCLL_HSSCLL) | fsscll; sclh = (hssclh << OMAP_I2C_SCLH_HSSCLH) | fssclh; |