Merge branch 'for-2.6.24' of master.kernel.org:/pub/scm/linux/kernel/git/galak/powerp...

[linux-2.6-omap-h63xx.git] / drivers / mmc / host / pxamci.c

diff --git a/drivers/mmc/host/pxamci.c b/drivers/mmc/host/pxamci.c
index a25ee71998a9090393b4e20653d90cbed53ab71b..1654a3330340a2bfdfb1fd740d15ed4af0e76f95 100644 (file)
--- 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)) {