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path: root/drivers/mmc/host/imxmmc.c
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Diffstat (limited to 'drivers/mmc/host/imxmmc.c')
-rw-r--r--drivers/mmc/host/imxmmc.c32
1 files changed, 26 insertions, 6 deletions
diff --git a/drivers/mmc/host/imxmmc.c b/drivers/mmc/host/imxmmc.c
index 95f33e87a99..5e880c0f134 100644
--- a/drivers/mmc/host/imxmmc.c
+++ b/drivers/mmc/host/imxmmc.c
@@ -42,6 +42,7 @@
#include <linux/mmc/host.h>
#include <linux/mmc/card.h>
#include <linux/delay.h>
+#include <linux/clk.h>
#include <asm/dma.h>
#include <asm/io.h>
@@ -92,6 +93,8 @@ struct imxmci_host {
unsigned char actual_bus_width;
int prev_cmd_code;
+
+ struct clk *clk;
};
#define IMXMCI_PEND_IRQ_b 0
@@ -841,7 +844,7 @@ static void imxmci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
/* The prescaler is 5 for PERCLK2 equal to 96MHz
* then 96MHz / 5 = 19.2 MHz
*/
- clk=imx_get_perclk2();
+ clk = clk_get_rate(host->clk);
prescaler=(clk+(CLK_RATE*7)/8)/CLK_RATE;
switch(prescaler) {
case 0:
@@ -889,9 +892,12 @@ static int imxmci_get_ro(struct mmc_host *mmc)
struct imxmci_host *host = mmc_priv(mmc);
if (host->pdata && host->pdata->get_ro)
- return host->pdata->get_ro(mmc_dev(mmc));
- /* Host doesn't support read only detection so assume writeable */
- return 0;
+ return !!host->pdata->get_ro(mmc_dev(mmc));
+ /*
+ * Board doesn't support read only detection; let the mmc core
+ * decide what to do.
+ */
+ return -ENOSYS;
}
@@ -994,6 +1000,13 @@ static int imxmci_probe(struct platform_device *pdev)
host->res = r;
host->irq = irq;
+ host->clk = clk_get(&pdev->dev, "perclk2");
+ if (IS_ERR(host->clk)) {
+ ret = PTR_ERR(host->clk);
+ goto out;
+ }
+ clk_enable(host->clk);
+
imx_gpio_mode(PB8_PF_SD_DAT0);
imx_gpio_mode(PB9_PF_SD_DAT1);
imx_gpio_mode(PB10_PF_SD_DAT2);
@@ -1017,8 +1030,8 @@ static int imxmci_probe(struct platform_device *pdev)
host->imask = IMXMCI_INT_MASK_DEFAULT;
MMC_INT_MASK = host->imask;
-
- if(imx_dma_request_by_prio(&host->dma, DRIVER_NAME, DMA_PRIO_LOW)<0){
+ host->dma = imx_dma_request_by_prio(DRIVER_NAME, DMA_PRIO_LOW);
+ if(host->dma < 0) {
dev_err(mmc_dev(host->mmc), "imx_dma_request_by_prio failed\n");
ret = -EBUSY;
goto out;
@@ -1053,6 +1066,10 @@ out:
imx_dma_free(host->dma);
host->dma_allocated=0;
}
+ if (host->clk) {
+ clk_disable(host->clk);
+ clk_put(host->clk);
+ }
}
if (mmc)
mmc_free_host(mmc);
@@ -1082,6 +1099,9 @@ static int imxmci_remove(struct platform_device *pdev)
tasklet_kill(&host->tasklet);
+ clk_disable(host->clk);
+ clk_put(host->clk);
+
release_resource(host->res);
mmc_free_host(mmc);