use devm_get_clk() for automatic put upon device close, check for and
propagate errors when enabling clocks, must prepare clocks before they
can get enabled, unprepare after disable
Signed-off-by: Gerhard Sittig <gsi@xxxxxxx>
---
drivers/usb/host/fsl-mph-dr-of.c | 16 +++++++++-------
1 file changed, 9 insertions(+), 7 deletions(-)
diff --git a/drivers/usb/host/fsl-mph-dr-of.c b/drivers/usb/host/fsl-mph-dr-of.c
index 11e0b79..b8a1866 100644
--- a/drivers/usb/host/fsl-mph-dr-of.c
+++ b/drivers/usb/host/fsl-mph-dr-of.c
@@ -260,6 +260,7 @@ int fsl_usb2_mpc5121_init(struct platform_device *pdev)
{
struct fsl_usb2_platform_data *pdata = pdev->dev.platform_data;
struct clk *clk;
+ int err;
char clk_name[10];
int base, clk_num;
@@ -272,13 +273,16 @@ int fsl_usb2_mpc5121_init(struct platform_device *pdev)
return -ENODEV;
snprintf(clk_name, sizeof(clk_name), "usb%d_clk", clk_num);
- clk = clk_get(&pdev->dev, clk_name);
+ clk = devm_clk_get(&pdev->dev, clk_name);
if (IS_ERR(clk)) {
dev_err(&pdev->dev, "failed to get clk\n");
return PTR_ERR(clk);
}
-
- clk_enable(clk);
+ err = clk_prepare_enable(clk);
+ if (err) {
+ dev_err(&pdev->dev, "failed to enable clk\n");
+ return err;
+ }
pdata->clk = clk;
if (pdata->phy_mode == FSL_USB2_PHY_UTMI_WIDE) {
@@ -302,10 +306,8 @@ static void fsl_usb2_mpc5121_exit(struct platform_device *pdev)
pdata->regs = NULL;
- if (pdata->clk) {
- clk_disable(pdata->clk);
- clk_put(pdata->clk);
- }
+ if (pdata->clk)
+ clk_disable_unprepare(pdata->clk);
}
static struct fsl_usb2_platform_data fsl_usb2_mpc5121_pd = {
--
1.7.10.4
--
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