diff options
| author | Girish K S <ks.giri@samsung.com> | 2012-10-08 14:06:33 +0900 |
|---|---|---|
| committer | Tushar Behera <tushar.behera@linaro.org> | 2013-06-03 11:41:52 +0530 |
| commit | 8ff86170a22906719bafc481086b38e5f61f39ba (patch) | |
| tree | 2665fab5042ee18ae3b23cf355eb415efbbf4cb7 | |
| parent | a241281c362b442881b87e62968caaa019bfe1bd (diff) | |
usb: ehci-s5p: add the HSIC port initialization
The hub-reset and hub-connect pins should be pulled low before phy init
and need to be pulled high after completion of phy init.
Signed-off-by: Girish K S <ks.giri@samsung.com>
Signed-off-by: Yuvaraj Kumar C D <yuvaraj.cd@samsung.com>
Signed-off-by: Tushar Behera <tushar.behera@linaro.org>
| -rw-r--r-- | drivers/usb/host/ehci-s5p.c | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/drivers/usb/host/ehci-s5p.c b/drivers/usb/host/ehci-s5p.c index 379037f51a2..b2b98cdc397 100644 --- a/drivers/usb/host/ehci-s5p.c +++ b/drivers/usb/host/ehci-s5p.c @@ -52,6 +52,25 @@ struct s5p_ehci_hcd { #define to_s5p_ehci(hcd) (struct s5p_ehci_hcd *)(hcd_to_ehci(hcd)->priv) +static void s5p_setup_hub_gpio(struct platform_device *pdev, const char *propname, int level) +{ + int err; + int gpio; + + if (!pdev->dev.of_node) + return; + + gpio = of_get_named_gpio(pdev->dev.of_node, propname, 0); + if (!gpio_is_valid(gpio)) + return; + err = gpio_request_one(gpio, level, "ehci_vbus_gpio"); + + if (err) + dev_err(&pdev->dev, "can't request ehci hub-reset gpio %d", gpio); + else + gpio_free(gpio); +} + static void s5p_setup_vbus_gpio(struct platform_device *pdev) { struct device *dev = &pdev->dev; @@ -154,11 +173,18 @@ static int s5p_ehci_probe(struct platform_device *pdev) if (s5p_ehci->otg) s5p_ehci->otg->set_host(s5p_ehci->otg, &hcd->self); + s5p_setup_hub_gpio(pdev, "hub-reset", GPIOF_OUT_INIT_LOW); + s5p_setup_hub_gpio(pdev, "hub-connect", GPIOF_OUT_INIT_LOW); + if (s5p_ehci->phy) usb_phy_init(s5p_ehci->phy); else if (s5p_ehci->pdata->phy_init) s5p_ehci->pdata->phy_init(pdev, USB_PHY_TYPE_HOST); + mdelay(1); + s5p_setup_hub_gpio(pdev, "hub-reset", GPIOF_OUT_INIT_HIGH); + s5p_setup_hub_gpio(pdev, "hub-connect", GPIOF_OUT_INIT_HIGH); + ehci = hcd_to_ehci(hcd); ehci->caps = hcd->regs; |