Messages in this thread | | | From | Jingoo Han <> | Subject | Re: [PATCH 3/3 v3] USB: ehci-s5p: Add vbus setup function to the s5p ehci glue layer | Date | Mon, 16 Jul 2012 15:40:18 +0900 |
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On Monday, July 16, 2012 2:56 PM, Vivek Gautam wrote: > > This patch retrieves and configures the vbus control gpio via > the device tree. The suspend/resume callbacks will be later > modified for vbus control. > > Signed-off-by: Abhilash Kesavan <a.kesavan@samsung.com> > Signed-off-by: Vivek Gautam <gautam.vivek@samsung.com>
Acked-by: Jingoo Han <jg1.han@samsung.com>
> > diff --git a/drivers/usb/host/ehci-s5p.c b/drivers/usb/host/ehci-s5p.c > index 37d84cf..4037878 100644 > --- a/drivers/usb/host/ehci-s5p.c > +++ b/drivers/usb/host/ehci-s5p.c > @@ -15,6 +15,7 @@ > #include <linux/clk.h> > #include <linux/of.h> > #include <linux/platform_device.h> > +#include <linux/of_gpio.h> > #include <plat/ehci.h> > #include <plat/usb-phy.h> > > @@ -64,6 +65,28 @@ static const struct hc_driver s5p_ehci_hc_driver = { > .clear_tt_buffer_complete = ehci_clear_tt_buffer_complete, > }; > > +static int s5p_ehci_setup_gpio(struct platform_device *pdev) > +{ > + int err; > + int gpio; > + > + if (!pdev->dev.of_node) > + return 0; > + > + gpio = of_get_named_gpio(pdev->dev.of_node, > + "samsung,vbus-gpio", 0); > + if (!gpio_is_valid(gpio)) > + return 0; > + > + err = gpio_request_one(gpio, GPIOF_OUT_INIT_HIGH, "ehci_vbus_gpio"); > + if (err) { > + dev_err(&pdev->dev, "can't request ehci vbus gpio %d", gpio); > + return err; > + } > + > + return err; > +} > + > static u64 ehci_s5p_dma_mask = DMA_BIT_MASK(32); > > static int __devinit s5p_ehci_probe(struct platform_device *pdev) > @@ -92,6 +115,8 @@ static int __devinit s5p_ehci_probe(struct platform_device *pdev) > if (!pdev->dev.coherent_dma_mask) > pdev->dev.coherent_dma_mask = DMA_BIT_MASK(32); > > + s5p_ehci_setup_gpio(pdev); > + > s5p_ehci = devm_kzalloc(&pdev->dev, sizeof(struct s5p_ehci_hcd), > GFP_KERNEL); > if (!s5p_ehci) > -- > 1.7.0.4
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