From: Fabio Estevam <fabio.estevam@xxxxxxxxxxxxx>
With the new common clock infrastructure, the following clocks should be
used on i.MX drivers: ipg, per and ahb.
Adapt fsl_mxc_udc to follow this new behaviour to fix the following probe error:
Freescale High-Speed USB SOC Device Controller driver (Apr 20, 2007)
fsl-usb2-udc fsl-usb2-udc: clk_get("usb") failed
fsl-usb2-udc: probe of fsl-usb2-udc failed with error -2
Reported-by: Christoph Fritz <chf.fritz@xxxxxxxxxxxxxx>
Signed-off-by: Fabio Estevam <fabio.estevam@xxxxxxxxxxxxx>
---
Changes since v1:
- Fix error path for mxc_ipg_clk
- Use clk_disable_unprepare in other locations as well
drivers/usb/gadget/fsl_mxc_udc.c | 26 +++++++++++++++++---------
1 files changed, 17 insertions(+), 9 deletions(-)
diff --git a/drivers/usb/gadget/fsl_mxc_udc.c b/drivers/usb/gadget/fsl_mxc_udc.c
index dcbc0a2..15986f6 100644
--- a/drivers/usb/gadget/fsl_mxc_udc.c
+++ b/drivers/usb/gadget/fsl_mxc_udc.c
@@ -22,6 +22,7 @@
static struct clk *mxc_ahb_clk;
static struct clk *mxc_usb_clk;
+static struct clk *mxc_ipg_clk;
/* workaround ENGcm09152 for i.MX35 */
#define USBPHYCTRL_OTGBASE_OFFSET 0x608
@@ -35,12 +36,19 @@ int fsl_udc_clk_init(struct platform_device *pdev)
pdata = pdev->dev.platform_data;
+ mxc_ipg_clk = devm_clk_get(&pdev->dev, "ipg");
+ if (IS_ERR(mxc_ipg_clk)) {
+ dev_err(&pdev->dev, "clk_get(\"ipg\") failed\n");
+ ret = PTR_ERR(mxc_ipg_clk);
+ goto eenahb;
+ }
+
if (!cpu_is_mx35() && !cpu_is_mx25()) {
- mxc_ahb_clk = clk_get(&pdev->dev, "usb_ahb");
+ mxc_ahb_clk = devm_clk_get(&pdev->dev, "ahb");
if (IS_ERR(mxc_ahb_clk))
return PTR_ERR(mxc_ahb_clk);
- ret = clk_enable(mxc_ahb_clk);
+ ret = clk_prepare_enable(mxc_ahb_clk);
if (ret < 0) {
dev_err(&pdev->dev, "clk_enable(\"usb_ahb\") failed\n");
goto eenahb;
@@ -48,9 +56,9 @@ int fsl_udc_clk_init(struct platform_device *pdev)
}
/* make sure USB_CLK is running at 60 MHz +/- 1000 Hz */
- mxc_usb_clk = clk_get(&pdev->dev, "usb");
+ mxc_usb_clk = devm_clk_get(&pdev->dev, "per");
if (IS_ERR(mxc_usb_clk)) {
- dev_err(&pdev->dev, "clk_get(\"usb\") failed\n");
+ dev_err(&pdev->dev, "clk_get(\"per\") failed\n");
ret = PTR_ERR(mxc_usb_clk);
goto egusb;
}
@@ -65,7 +73,7 @@ int fsl_udc_clk_init(struct platform_device *pdev)
}
}
- ret = clk_enable(mxc_usb_clk);
+ ret = clk_prepare_enable(mxc_usb_clk);
if (ret < 0) {
dev_err(&pdev->dev, "clk_enable(\"usb_clk\") failed\n");
goto eenusb;
@@ -79,7 +87,7 @@ eclkrate:
mxc_usb_clk = NULL;
egusb:
if (!cpu_is_mx35())
- clk_disable(mxc_ahb_clk);
+ clk_disable_unprepare(mxc_ahb_clk);
eenahb:
if (!cpu_is_mx35())
clk_put(mxc_ahb_clk);
@@ -104,7 +112,7 @@ void fsl_udc_clk_finalize(struct platform_device *pdev)
/* ULPI transceivers don't need usbpll */
if (pdata->phy_mode == FSL_USB2_PHY_ULPI) {
- clk_disable(mxc_usb_clk);
+ clk_disable_unprepare(mxc_usb_clk);
clk_put(mxc_usb_clk);
mxc_usb_clk = NULL;
}
@@ -113,11 +121,11 @@ void fsl_udc_clk_finalize(struct platform_device *pdev)
void fsl_udc_clk_release(void)
{
if (mxc_usb_clk) {
- clk_disable(mxc_usb_clk);
+ clk_disable_unprepare(mxc_usb_clk);
clk_put(mxc_usb_clk);
}
if (!cpu_is_mx35()) {
- clk_disable(mxc_ahb_clk);
+ clk_disable_unprepare(mxc_ahb_clk);
clk_put(mxc_ahb_clk);
}
}
--
1.7.1
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