On 27/07/15 12:47, Sifan Naeem wrote:
> Using % can be slow depending on the architecture.
>
> Using DIV_ROUND_UP is nicer and more efficient way to do it.
>
> Fixes: 27bce4 ("i2c: img-scb: Add Imagination Technologies I2C SCB driver")
> Signed-off-by: Sifan Naeem <sifan.naeem@xxxxxxxxxx>
> Cc: Stable kernel (v3.19+) <stable@xxxxxxxxxxxxxxx>
Acked-by: James Hogan <james.hogan@xxxxxxxxxx>
Cheers
James
> ---
> drivers/i2c/busses/i2c-img-scb.c | 8 ++------
> 1 file changed, 2 insertions(+), 6 deletions(-)
>
> diff --git a/drivers/i2c/busses/i2c-img-scb.c b/drivers/i2c/busses/i2c-img-scb.c
> index 0368d91..b4f59e1 100644
> --- a/drivers/i2c/busses/i2c-img-scb.c
> +++ b/drivers/i2c/busses/i2c-img-scb.c
> @@ -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;
>
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