[PATCH 2/6] usb: dwc3-omap: use runtime API's to enable clocks
From: Kishon Vijay Abraham I <hidden>
Date: 2012-09-28 12:53:54
Also in:
linux-devicetree, linux-omap, lkml
Subsystem:
designware usb3 drd ip driver, omap usb support, the rest, usb subsystem · Maintainers:
Thinh Nguyen, Linus Torvalds, Greg Kroah-Hartman
Before accessing any register, runtime API's should be invoked to enable the clocks. runtime API's are added here to prevent abort during register access. Signed-off-by: Kishon Vijay Abraham I <redacted> --- drivers/usb/dwc3/dwc3-omap.c | 10 ++++++++++ 1 file changed, 10 insertions(+)
diff --git a/drivers/usb/dwc3/dwc3-omap.c b/drivers/usb/dwc3/dwc3-omap.c
index 34578de..6a0e17f 100644
--- a/drivers/usb/dwc3/dwc3-omap.c
+++ b/drivers/usb/dwc3/dwc3-omap.c@@ -43,6 +43,7 @@ #include <linux/spinlock.h> #include <linux/platform_device.h> #include <linux/platform_data/dwc3-omap.h> +#include <linux/pm_runtime.h> #include <linux/dma-mapping.h> #include <linux/ioport.h> #include <linux/io.h>
@@ -281,6 +282,13 @@ static int __devinit dwc3_omap_probe(struct platform_device *pdev) omap->irq = irq; omap->base = base; + pm_runtime_enable(dev); + ret = pm_runtime_get_sync(dev); + if (ret < 0) { + dev_err(dev, "get_sync failed with err %d\n", ret); + goto err1; + } + reg = dwc3_omap_readl(omap->base, USBOTGSS_UTMI_OTG_STATUS); utmi_mode = of_get_property(node, "utmi-mode", &size);
@@ -354,6 +362,8 @@ err1: static int __devexit dwc3_omap_remove(struct platform_device *pdev) { device_for_each_child(&pdev->dev, NULL, dwc3_remove_core); + pm_runtime_put(&pdev->dev); + pm_runtime_disable(&pdev->dev); return 0; }
--
1.7.10.4