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i2c: img-scb: use DIV_ROUND_UP to round divisor values 

Using % can be slow depending on the architecture.

Using DIV_ROUND_UP is nicer and more efficient way to do it.

Fixes: commit 27bce457d5 ("i2c: img-scb: Add Imagination Technologies I2C SCB driver")
Signed-off-by: Sifan Naeem <sifan.naeem@imgtec.com>
Acked-by: James Hogan <james.hogan@imgtec.com>
Reviewed-by: James Hartley <james.hartley@imgtec.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
This commit is contained in:
Sifan Naeem 2015-09-10 15:50:03 +01:00 committed by Wolfram Sang
parent 2aefb1bd41
commit 5728d95f24
1 changed files with 2 additions and 6 deletions
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8
drivers/i2c/busses/i2c-img-scb.c
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@ -1179,9 +1179,7 @@ static int img_i2c_init(struct img_i2c *i2c)
int_bitrate++;
/* Setup TCKH value */
tckh = timing.tckh / clk_period;
if (timing.tckh % clk_period)
tckh++;
tckh = DIV_ROUND_UP(timing.tckh, clk_period);
if (tckh > 0)
data = tckh - 1;
@ -1201,9 +1199,7 @@ static int img_i2c_init(struct img_i2c *i2c)
img_i2c_writel(i2c, SCB_TIME_TCKL_REG, data);
/* Setup TSDH value */
tsdh = timing.tsdh / clk_period;
if (timing.tsdh % clk_period)
tsdh++;
tsdh = DIV_ROUND_UP(timing.tsdh, clk_period);
if (tsdh > 1)
data = tsdh - 1;