From 881142660697bba0f3ef44f070d80632082c978f Mon Sep 17 00:00:00 2001 From: Ajay Kumar Gupta Date: Mon, 28 Dec 2009 13:40:46 +0200 Subject: [PATCH] usb: host: ehci: adding regulator framework in ehci-omap.c driver. OMAP3 has three HS USB ports so it can have three different regulator for each PHY connected to each port. Currently these regulators are assumed to be optional and driver doesn't fail but continue with the initialization if it doesn't get any regulators. Regulator supply names has to be mapped in board files as 'hsusbN' where 'N' is port number and can be {0, 1 ,2}. Signed-off-by: Ajay Kumar Gupta Signed-off-by: Felipe Balbi Signed-off-by: Greg Kroah-Hartman --- drivers/usb/host/ehci-omap.c | 36 ++++++++++++++++++++++++++++++++++++ 1 file changed, 36 insertions(+) diff --git a/drivers/usb/host/ehci-omap.c b/drivers/usb/host/ehci-omap.c index 2460f0d82990..17e4ceb5014d 100644 --- a/drivers/usb/host/ehci-omap.c +++ b/drivers/usb/host/ehci-omap.c @@ -37,6 +37,7 @@ #include #include #include +#include #include /* @@ -178,6 +179,11 @@ struct ehci_hcd_omap { void __iomem *uhh_base; void __iomem *tll_base; void __iomem *ehci_base; + + /* Regulators for USB PHYs. + * Each PHY can have a seperate regulator. + */ + struct regulator *regulator[OMAP3_HS_USB_PORTS]; }; /*-------------------------------------------------------------------------*/ @@ -546,6 +552,8 @@ static int ehci_hcd_omap_probe(struct platform_device *pdev) int irq = platform_get_irq(pdev, 0); int ret = -ENODEV; + int i; + char supply[7]; if (!pdata) { dev_dbg(&pdev->dev, "missing platform_data\n"); @@ -613,6 +621,21 @@ static int ehci_hcd_omap_probe(struct platform_device *pdev) goto err_tll_ioremap; } + /* get ehci regulator and enable */ + for (i = 0 ; i < OMAP3_HS_USB_PORTS ; i++) { + if (omap->port_mode[i] != EHCI_HCD_OMAP_MODE_PHY) { + omap->regulator[i] = NULL; + continue; + } + snprintf(supply, sizeof(supply), "hsusb%d", i); + omap->regulator[i] = regulator_get(omap->dev, supply); + if (IS_ERR(omap->regulator[i])) + dev_dbg(&pdev->dev, + "failed to get ehci port%d regulator\n", i); + else + regulator_enable(omap->regulator[i]); + } + ret = omap_start_ehc(omap, hcd); if (ret) { dev_dbg(&pdev->dev, "failed to start ehci\n"); @@ -641,6 +664,12 @@ err_add_hcd: omap_stop_ehc(omap, hcd); err_start: + for (i = 0 ; i < OMAP3_HS_USB_PORTS ; i++) { + if (omap->regulator[i]) { + regulator_disable(omap->regulator[i]); + regulator_put(omap->regulator[i]); + } + } iounmap(omap->tll_base); err_tll_ioremap: @@ -674,10 +703,17 @@ static int ehci_hcd_omap_remove(struct platform_device *pdev) { struct ehci_hcd_omap *omap = platform_get_drvdata(pdev); struct usb_hcd *hcd = ehci_to_hcd(omap->ehci); + int i; usb_remove_hcd(hcd); omap_stop_ehc(omap, hcd); iounmap(hcd->regs); + for (i = 0 ; i < OMAP3_HS_USB_PORTS ; i++) { + if (omap->regulator[i]) { + regulator_disable(omap->regulator[i]); + regulator_put(omap->regulator[i]); + } + } iounmap(omap->tll_base); iounmap(omap->uhh_base); usb_put_hcd(hcd); -- 2.20.1