diff options
Diffstat (limited to 'drivers/mmc/host/sdhci-of.c')
| -rw-r--r-- | drivers/mmc/host/sdhci-of.c | 19 |
1 files changed, 8 insertions, 11 deletions
diff --git a/drivers/mmc/host/sdhci-of.c b/drivers/mmc/host/sdhci-of.c index c8dab07e34b..01ab916c280 100644 --- a/drivers/mmc/host/sdhci-of.c +++ b/drivers/mmc/host/sdhci-of.c @@ -121,8 +121,8 @@ static void esdhc_writeb(struct sdhci_host *host, u8 val, int reg) static void esdhc_set_clock(struct sdhci_host *host, unsigned int clock) { - int div; int pre_div = 2; + int div = 1; clrbits32(host->ioaddr + ESDHC_SYSTEM_CONTROL, ESDHC_CLOCK_IPGEN | ESDHC_CLOCK_HCKEN | ESDHC_CLOCK_PEREN | ESDHC_CLOCK_MASK); @@ -130,17 +130,14 @@ static void esdhc_set_clock(struct sdhci_host *host, unsigned int clock) if (clock == 0) goto out; - if (host->max_clk / 16 > clock) { - for (; pre_div < 256; pre_div *= 2) { - if (host->max_clk / pre_div < clock * 16) - break; - } - } + while (host->max_clk / pre_div / 16 > clock && pre_div < 256) + pre_div *= 2; - for (div = 1; div <= 16; div++) { - if (host->max_clk / (div * pre_div) <= clock) - break; - } + while (host->max_clk / pre_div / div > clock && div < 16) + div++; + + dev_dbg(mmc_dev(host->mmc), "desired SD clock: %d, actual: %d\n", + clock, host->max_clk / pre_div / div); pre_div >>= 1; div--; |