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| author | Nobuhiro Iwamatsu <nobuhiro.iwamatsu.yj@renesas.com> | 2014-12-03 17:57:00 +0900 |
|---|---|---|
| committer | Nobuhiro Iwamatsu <iwamatsu@nigauri.org> | 2014-12-05 11:15:11 +0900 |
| commit | 21ea350385149e0e96c51b2cac5e91cd4fd143bc (patch) | |
| tree | 75e007c78a848f003dfc07cf07b2d5dcfb0ca05f /drivers | |
| parent | 97cdf64026c7d749dd7a5c0dbaba7a60a7292ac9 (diff) | |
| download | u-boot-21ea350385149e0e96c51b2cac5e91cd4fd143bc.tar.gz u-boot-21ea350385149e0e96c51b2cac5e91cd4fd143bc.tar.bz2 u-boot-21ea350385149e0e96c51b2cac5e91cd4fd143bc.zip | |
mmc: sh_mmcif: Use DIV_ROUND_UP and fls instead of calculation loop
Use DIV_ROUND_UP and fls to simplify the code.
Signed-off-by: Nobuhiro Iwamatsu <nobuhiro.iwamatsu.yj@renesas.com>
Signed-off-by: Nobuhiro Iwamatsu <iwamatsu@nigauri.org>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/mmc/sh_mmcif.c | 14 |
1 files changed, 6 insertions, 8 deletions
diff --git a/drivers/mmc/sh_mmcif.c b/drivers/mmc/sh_mmcif.c index ed83a14c2d..8f386e23da 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); } |