The port clocks are not required to access the port registers,
they are only needed when the PORT is used. So we move the port clock
handling code to omap_tll_enable/disable().
Also get of unnecessary spinlock code in probe function and check for
missing platform data.
Signed-off-by: Roger Quadros <rogerq@xxxxxx>
---
drivers/mfd/omap-usb-tll.c | 102 +++++++++++++++++---------------------------
1 files changed, 39 insertions(+), 63 deletions(-)
diff --git a/drivers/mfd/omap-usb-tll.c b/drivers/mfd/omap-usb-tll.c
index 7054395e..31ac7db 100644
--- a/drivers/mfd/omap-usb-tll.c
+++ b/drivers/mfd/omap-usb-tll.c
@@ -114,8 +114,8 @@ struct usbtll_omap {
/*-------------------------------------------------------------------------*/
-const char usbtll_driver_name[] = USBTLL_DRIVER_NAME;
-struct platform_device *tll_pdev;
+static const char usbtll_driver_name[] = USBTLL_DRIVER_NAME;
+static struct device *tll_dev;
/*-------------------------------------------------------------------------*/
@@ -217,7 +217,6 @@ static int __devinit usbtll_omap_probe(struct platform_device *pdev)
struct resource *res;
struct usbtll_omap *tll;
unsigned reg;
- unsigned long flags;
int ret = 0;
int i, ver;
bool needs_tll;
@@ -230,6 +229,11 @@ static int __devinit usbtll_omap_probe(struct platform_device *pdev)
return -ENOMEM;
}
+ if (!pdata) {
+ dev_err(dev, "%s : Platform data mising\n", __func__);
+ return -ENODEV;
+ }
+
spin_lock_init(&tll->lock);
tll->pdata = pdata;
@@ -253,8 +257,6 @@ static int __devinit usbtll_omap_probe(struct platform_device *pdev)
pm_runtime_enable(dev);
pm_runtime_get_sync(dev);
- spin_lock_irqsave(&tll->lock, flags);
-
ver = usbtll_read(base, OMAP_USBTLL_REVISION);
switch (ver) {
case OMAP_USBTLL_REV1:
@@ -331,13 +333,13 @@ static int __devinit usbtll_omap_probe(struct platform_device *pdev)
}
}
- tll_pdev = pdev;
+ /* only after this can omap_tll_enable/disable work */
+ tll_dev = dev;
err_clk:
for (--i; i >= 0 ; i--)
clk_put(tll->ch_clk[i]);
- spin_unlock_irqrestore(&tll->lock, flags);
pm_runtime_put_sync(dev);
if (ret == 0) {
pr_info("OMAP USB TLL : revision 0x%x, channels %d\n",
@@ -364,6 +366,7 @@ static int __devexit usbtll_omap_remove(struct platform_device *pdev)
struct usbtll_omap *tll = platform_get_drvdata(pdev);
int i;
+ tll_dev = NULL;
iounmap(tll->base);
for (i = 0; i < tll->nch; i++)
clk_put(tll->ch_clk[i]);
@@ -373,98 +376,71 @@ static int __devexit usbtll_omap_remove(struct platform_device *pdev)
return 0;
}
-static int usbtll_runtime_resume(struct device *dev)
+static struct platform_driver usbtll_omap_driver = {
+ .driver = {
+ .name = (char *)usbtll_driver_name,
+ .owner = THIS_MODULE,
+ },
+ .probe = usbtll_omap_probe,
+ .remove = __devexit_p(usbtll_omap_remove),
+};
+
+int omap_tll_enable(void)
{
- struct usbtll_omap *tll = dev_get_drvdata(dev);
- struct usbtll_omap_platform_data *pdata = tll->pdata;
+ struct usbtll_omap *tll;
unsigned long flags;
int i;
- dev_dbg(dev, "usbtll_runtime_resume\n");
-
- if (!pdata) {
- dev_dbg(dev, "missing platform_data\n");
+ if (!tll_dev) {
+ pr_err("%s: OMAP USB TLL not initialized\n", __func__);
return -ENODEV;
}
+ tll = dev_get_drvdata(tll_dev);
spin_lock_irqsave(&tll->lock, flags);
for (i = 0; i < tll->nch; i++) {
- if (mode_needs_tll(pdata->port_mode[i])) {
+ if (mode_needs_tll(tll->pdata->port_mode[i])) {
int r;
r = clk_enable(tll->ch_clk[i]);
if (r) {
- dev_err(dev,
- "%s : Error enabling ch %d clock: %d\n",
- __func__, i, r);
+ dev_err(tll_dev,
+ "%s : Error enabling ch %d clock: %d\n",
+ __func__, i, r);
}
}
}
+ i = pm_runtime_get_sync(tll_dev);
spin_unlock_irqrestore(&tll->lock, flags);
- return 0;
+ return i;
}
+EXPORT_SYMBOL_GPL(omap_tll_enable);
-static int usbtll_runtime_suspend(struct device *dev)
+int omap_tll_disable(void)
{
- struct usbtll_omap *tll = dev_get_drvdata(dev);
- struct usbtll_omap_platform_data *pdata = tll->pdata;
+ struct usbtll_omap *tll;
unsigned long flags;
int i;
- dev_dbg(dev, "usbtll_runtime_suspend\n");
-
- if (!pdata) {
- dev_dbg(dev, "missing platform_data\n");
+ if (!tll_dev) {
+ pr_err("%s: OMAP USB TLL not initialized\n", __func__);
return -ENODEV;
}
+ tll = dev_get_drvdata(tll_dev);
spin_lock_irqsave(&tll->lock, flags);
for (i = 0; i < tll->nch; i++) {
- if (mode_needs_tll(pdata->port_mode[i]))
+ if (mode_needs_tll(tll->pdata->port_mode[i]))
clk_disable(tll->ch_clk[i]);
}
+ i = pm_runtime_put_sync(tll_dev);
spin_unlock_irqrestore(&tll->lock, flags);
- return 0;
-}
-
-static const struct dev_pm_ops usbtllomap_dev_pm_ops = {
- SET_RUNTIME_PM_OPS(usbtll_runtime_suspend,
- usbtll_runtime_resume,
- NULL)
-};
-
-static struct platform_driver usbtll_omap_driver = {
- .driver = {
- .name = (char *)usbtll_driver_name,
- .owner = THIS_MODULE,
- .pm = &usbtllomap_dev_pm_ops,
- },
- .probe = usbtll_omap_probe,
- .remove = __devexit_p(usbtll_omap_remove),
-};
-
-int omap_tll_enable(void)
-{
- if (!tll_pdev) {
- pr_err("missing omap usbhs tll platform_data\n");
- return -ENODEV;
- }
- return pm_runtime_get_sync(&tll_pdev->dev);
-}
-EXPORT_SYMBOL_GPL(omap_tll_enable);
-
-int omap_tll_disable(void)
-{
- if (!tll_pdev) {
- pr_err("missing omap usbhs tll platform_data\n");
- return -ENODEV;
- }
- return pm_runtime_put_sync(&tll_pdev->dev);
+ return i;
}
EXPORT_SYMBOL_GPL(omap_tll_disable);
--
1.7.4.1
--
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