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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>
This commit is contained in:
Vivek Gautam 2012-07-17 10:10:50 +05:30 committed by Greg Kroah-Hartman
parent d81a5d1956
commit fd81d59c90
1 changed files with 21 additions and 0 deletions
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21
drivers/usb/host/ehci-s5p.c
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@ -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)