diff options
| author | Girish K S <girish@avatar.(none)> | 2012-10-08 14:06:33 +0900 |
|---|---|---|
| committer | Tushar Behera <tushar.behera@linaro.org> | 2013-05-09 15:22:02 +0530 |
| commit | c2c80b67494281569a7a70c7e6077e78e10a271e (patch) | |
| tree | 50e542809bf25549e5966eb4861779dbf8fe19c4 | |
| parent | 94f98ac293ffc2a52707ec280f88795d45f466ff (diff) | |
drivers: usb: 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>
| -rw-r--r-- | drivers/usb/host/ehci-s5p.c | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/drivers/usb/host/ehci-s5p.c b/drivers/usb/host/ehci-s5p.c index 20ebf6a8b7f4..a93ab9903ada 100644 --- a/drivers/usb/host/ehci-s5p.c +++ b/drivers/usb/host/ehci-s5p.c @@ -90,6 +90,26 @@ static void s5p_ehci_phy_disable(struct s5p_ehci_hcd *s5p_ehci) s5p_ehci->pdata->phy_exit(pdev, USB_PHY_TYPE_HOST); } +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) { int err; @@ -200,8 +220,15 @@ static int s5p_ehci_probe(struct platform_device *pdev) if (s5p_ehci->otg) s5p_ehci->otg->set_host(s5p_ehci->otg, &s5p_ehci->hcd->self); + s5p_setup_hub_gpio(pdev, "samsung,hub-reset", GPIOF_OUT_INIT_LOW); + s5p_setup_hub_gpio(pdev, "samsung,hub-connect", GPIOF_OUT_INIT_LOW); + s5p_ehci_phy_enable(s5p_ehci); + mdelay(1); + s5p_setup_hub_gpio(pdev, "samsung,hub-reset", GPIOF_OUT_INIT_HIGH); + s5p_setup_hub_gpio(pdev, "samsung,hub-connect", GPIOF_OUT_INIT_HIGH); + ehci = hcd_to_ehci(hcd); ehci->caps = hcd->regs; |