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[4.2.y-ckt,129/211] i2c: img-scb: use DIV_ROUND_UP to round divisor values

Message ID 1452023119-25647-130-git-send-email-kamal@canonical.com
State New
Headers show

Commit Message

Kamal Mostafa Jan. 5, 2016, 7:43 p.m. UTC 
4.2.8-ckt1 -stable review patch.  If anyone has any objections, please let me know.

------------------

From: Sifan Naeem <sifan.naeem@imgtec.com>

commit 5728d95f2458887ae3d95547c04352bba5080ad6 upstream.

Using % can be slow depending on the architecture.

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

Fixes: commit 27bce457d588 ("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>
Signed-off-by: Kamal Mostafa <kamal@canonical.com>
---
 drivers/i2c/busses/i2c-img-scb.c | 8 ++------
 1 file changed, 2 insertions(+), 6 deletions(-)
diff mbox

Patch

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;