diff options
| author | Vivek Gautam <gautam.vivek@samsung.com> | 2012-07-17 10:10:50 +0530 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2012-07-17 10:48:29 -0700 |
| commit | fd81d59c90d38661e4891ee2f4c9b7c051e93022 (patch) | |
| tree | 3c1280657ba2c8aa549d2931e634b90c5a9d7f51 /drivers/usb/host | |
| parent | d81a5d1956731c453b85c141458d4ff5d6cc5366 (diff) | |
USB: ehci-s5p: Add vbus setup function to the s5p ehci glue layer
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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/usb/host')
| -rw-r--r-- | drivers/usb/host/ehci-s5p.c | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/drivers/usb/host/ehci-s5p.c b/drivers/usb/host/ehci-s5p.c index 37d84cf9a408..9d8f1dd57cb3 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 +65,24 @@ static const struct hc_driver s5p_ehci_hc_driver = { .clear_tt_buffer_complete = ehci_clear_tt_buffer_complete, }; +static void s5p_setup_vbus_gpio(struct platform_device *pdev) +{ + int err; + int gpio; + + if (!pdev->dev.of_node) + return; + + gpio = of_get_named_gpio(pdev->dev.of_node, + "samsung,vbus-gpio", 0); + if (!gpio_is_valid(gpio)) + return; + + 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); +} + static u64 ehci_s5p_dma_mask = DMA_BIT_MASK(32); static int __devinit s5p_ehci_probe(struct platform_device *pdev) @@ -92,6 +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_setup_vbus_gpio(pdev); + s5p_ehci = devm_kzalloc(&pdev->dev, sizeof(struct s5p_ehci_hcd), GFP_KERNEL); if (!s5p_ehci) |