diff options
| -rw-r--r-- | drivers/mmc/host/pxamci.c | 11 |
1 files changed, 9 insertions, 2 deletions
diff --git a/drivers/mmc/host/pxamci.c b/drivers/mmc/host/pxamci.c index a25ee71998a..1654a333034 100644 --- a/drivers/mmc/host/pxamci.c +++ b/drivers/mmc/host/pxamci.c @@ -39,6 +39,7 @@ #define DRIVER_NAME "pxa2xx-mci" #define NR_SG 1 +#define CLKRT_OFF (~0) struct pxamci_host { struct mmc_host *mmc; @@ -371,6 +372,9 @@ static void pxamci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios) unsigned long rate = host->clkrate; unsigned int clk = rate / ios->clock; + if (host->clkrt == CLKRT_OFF) + clk_enable(host->clk); + /* * clk might result in a lower divisor than we * desire. check for that condition and adjust @@ -379,14 +383,16 @@ static void pxamci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios) if (rate / clk > ios->clock) clk <<= 1; host->clkrt = fls(clk) - 1; - clk_enable(host->clk); /* * we write clkrt on the next command */ } else { pxamci_stop_clock(host); - clk_disable(host->clk); + if (host->clkrt != CLKRT_OFF) { + host->clkrt = CLKRT_OFF; + clk_disable(host->clk); + } } if (host->power_mode != ios->power_mode) { @@ -498,6 +504,7 @@ static int pxamci_probe(struct platform_device *pdev) host->mmc = mmc; host->dma = -1; host->pdata = pdev->dev.platform_data; + host->clkrt = CLKRT_OFF; host->clk = clk_get(&pdev->dev, "MMCCLK"); if (IS_ERR(host->clk)) { |