Use DIV_ROUND_UP and fls to simplify the code.
Signed-off-by: Nobuhiro Iwamatsu <nobuhiro.iwamatsu...@renesas.com>
---
drivers/mmc/sh_mmcif.c | 14 ++++++--------
1 file changed, 6 insertions(+), 8 deletions(-)
diff --git a/drivers/mmc/sh_mmcif.c b/drivers/mmc/sh_mmcif.c
index ed83a14..8f386e2 100644
--- a/drivers/mmc/sh_mmcif.c
+++ b/drivers/mmc/sh_mmcif.c
@@ -103,20 +103,18 @@ static int mmcif_wait_interrupt_flag(struct sh_mmcif_host
*host)
static void sh_mmcif_clock_control(struct sh_mmcif_host *host, unsigned int
clk)
{
- int i;
-
sh_mmcif_bitclr(CLK_ENABLE, &host->regs->ce_clk_ctrl);
sh_mmcif_bitclr(CLK_CLEAR, &host->regs->ce_clk_ctrl);
if (!clk)
return;
- if (clk == CLKDEV_EMMC_DATA) {
+
+ if (clk == CLKDEV_EMMC_DATA)
sh_mmcif_bitset(CLK_PCLK, &host->regs->ce_clk_ctrl);
- } else {
- for (i = 1; (unsigned int)host->clk / (1 << i) >= clk; i++)
- ;
- sh_mmcif_bitset((i - 1) << 16, &host->regs->ce_clk_ctrl);
- }
+ else
+ sh_mmcif_bitset((fls(DIV_ROUND_UP(host->clk,
+ clk) - 1) - 1) << 16,
+ &host->regs->ce_clk_ctrl);
sh_mmcif_bitset(CLK_ENABLE, &host->regs->ce_clk_ctrl);
}
--
2.1.3
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