[RFC][PATCH 4/4] usb: host: ohci-platform: add platform specific power callback

[Kuninori Morimoto <kuninori.morimoto.gx@xxxxxxxxxxx>]

This patch enables to call platform specific power callback function.

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@xxxxxxxxxxx>
---
v3 -> v4

 - remove macro
 - remove .power_suspen
 - check return value on resume

 drivers/usb/host/ohci-platform.c |   36 ++++++++++++++++++++++++++++++++++--
 include/linux/usb/ohci_pdriver.h |    8 ++++++++
 2 files changed, 42 insertions(+), 2 deletions(-)

diff --git a/drivers/usb/host/ohci-platform.c b/drivers/usb/host/ohci-platform.c
index 4c886f9..10d85b9 100644
--- a/drivers/usb/host/ohci-platform.c
+++ b/drivers/usb/host/ohci-platform.c
@@ -107,10 +107,18 @@ static int __devinit ohci_platform_probe(struct platform_device *dev)
 		return -ENXIO;
 	}
 
+	if (pdata->power_on) {
+		err = pdata->power_on(dev);
+		if (err < 0)
+			return err;
+	}
+
 	hcd = usb_create_hcd(&ohci_platform_hc_driver, &dev->dev,
 			dev_name(&dev->dev));
-	if (!hcd)
-		return -ENOMEM;
+	if (!hcd) {
+		err = -ENOMEM;
+		goto err_power;
+	}
 
 	hcd->rsrc_start = res_mem->start;
 	hcd->rsrc_len = resource_size(res_mem);
@@ -138,12 +146,17 @@ err_release_region:
 	release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
 err_put_hcd:
 	usb_put_hcd(hcd);
+err_power:
+	if (pdata->power_off)
+		pdata->power_off(dev);
+
 	return err;
 }
 
 static int __devexit ohci_platform_remove(struct platform_device *dev)
 {
 	struct usb_hcd *hcd = platform_get_drvdata(dev);
+	struct usb_ohci_pdata *pdata = dev->dev.platform_data;
 
 	usb_remove_hcd(hcd);
 	iounmap(hcd->regs);
@@ -151,6 +164,9 @@ static int __devexit ohci_platform_remove(struct platform_device *dev)
 	usb_put_hcd(hcd);
 	platform_set_drvdata(dev, NULL);
 
+	if (pdata->power_off)
+		pdata->power_off(dev);
+
 	return 0;
 }
 
@@ -158,12 +174,28 @@ static int __devexit ohci_platform_remove(struct platform_device *dev)
 
 static int ohci_platform_suspend(struct device *dev)
 {
+	struct usb_ohci_pdata *pdata = dev->platform_data;
+	struct platform_device *pdev =
+		container_of(dev, struct platform_device, dev);
+
+	if (pdata->power_suspend)
+		pdata->power_suspend(pdev);
+
 	return 0;
 }
 
 static int ohci_platform_resume(struct device *dev)
 {
 	struct usb_hcd *hcd = dev_get_drvdata(dev);
+	struct usb_ohci_pdata *pdata = dev->platform_data;
+	struct platform_device *pdev =
+		container_of(dev, struct platform_device, dev);
+
+	if (pdata->power_on) {
+		int err = pdata->power_on(pdev);
+		if (err < 0)
+			return err;
+	}
 
 	ohci_finish_controller_resume(hcd);
 	return 0;
diff --git a/include/linux/usb/ohci_pdriver.h b/include/linux/usb/ohci_pdriver.h
index 2808f2a..74e7755 100644
--- a/include/linux/usb/ohci_pdriver.h
+++ b/include/linux/usb/ohci_pdriver.h
@@ -33,6 +33,14 @@ struct usb_ohci_pdata {
 	unsigned	big_endian_desc:1;
 	unsigned	big_endian_mmio:1;
 	unsigned	no_big_frame_no:1;
+
+	/* Turn on all power and clocks */
+	int (*power_on)(struct platform_device *pdev);
+	/* Turn off all power and clocks */
+	void (*power_off)(struct platform_device *pdev);
+	/* Turn on only VBUS suspend power and hotplug detection,
+	 * turn off everything else */
+	void (*power_suspend)(struct platform_device *pdev);
 };
 
 #endif /* __USB_CORE_OHCI_PDRIVER_H */
-- 
1.7.5.4

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