Hi,
CC Lukasz M.,
Does it similar with pullup support at USB host?
Thank you,
Kyungmin Park
On Fri, Jul 6, 2012 at 11:24 PM, Vivek Gautam <gautam.vivek@xxxxxxxxxxx> wrote:
> From: Abhilash Kesavan <a.kesavan@xxxxxxxxxxx>
>
> 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@xxxxxxxxxxx>
> Signed-off-by: Vivek Gautam <gautam.vivek@xxxxxxxxxxx>
>
> diff --git a/drivers/usb/host/ehci-s5p.c b/drivers/usb/host/ehci-s5p.c
> index 58b0409..8d5dc03 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 +65,29 @@ 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 = 0;
> + 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(gpio, "ehci_vbus_gpio");
> + if (err) {
> + dev_err(&pdev->dev, "can't request ehci vbus gpio %d", gpio);
> + return err;
> + }
> + gpio_set_value(gpio, 1);
> +
> + return err;
> +}
> +
> static u64 ehci_s5p_dma_mask = DMA_BIT_MASK(32);
>
> static int __devinit s5p_ehci_probe(struct platform_device *pdev)
> @@ -87,6 +111,8 @@ 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 = kzalloc(sizeof(struct s5p_ehci_hcd), GFP_KERNEL);
> if (!s5p_ehci)
> return -ENOMEM;
> --
> 1.7.0.4
>
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