Hi. On Wednesday 09 April 2014 05:24 PM, Vivek Gautam wrote: > Adding support to enable/disable VBUS hooked to a gpio > to enable vbus supply on the port. > > Signed-off-by: Vivek Gautam <gautam.vivek@xxxxxxxxxxx> > --- > > Based on 'phy-exynos5-usbdrd' patches: > [PATCH V4 0/5] Add Exynos5 USB 3.0 phy driver based on generic PHY framework > http://www.spinics.net/lists/linux-usb/msg105507.html > > drivers/phy/phy-exynos5-usbdrd.c | 18 ++++++++++++++++++ > 1 file changed, 18 insertions(+) > > diff --git a/drivers/phy/phy-exynos5-usbdrd.c b/drivers/phy/phy-exynos5-usbdrd.c > index ff54a7c..5ca7485 100644 > --- a/drivers/phy/phy-exynos5-usbdrd.c > +++ b/drivers/phy/phy-exynos5-usbdrd.c > @@ -18,6 +18,7 @@ > #include <linux/module.h> > #include <linux/of.h> > #include <linux/of_address.h> > +#include <linux/of_gpio.h> > #include <linux/phy/phy.h> > #include <linux/platform_device.h> > #include <linux/mutex.h> > @@ -176,6 +177,7 @@ struct exynos5_usbdrd_phy { > struct clk *ref_clk; > unsigned long ref_rate; > unsigned int refclk_reg; > + int gpio; > }; > > #define to_usbdrd_phy(inst) \ > @@ -460,6 +462,9 @@ static int exynos5_usbdrd_phy_power_on(struct phy *phy) > if (!IS_ERR(phy_drd->usb30_sclk)) > clk_prepare_enable(phy_drd->usb30_sclk); > > + /* Toggle VBUS gpio - on */ > + gpio_set_value(phy_drd->gpio, 1); > + > /* Power-on PHY*/ > inst->phy_cfg->phy_isol(inst, 0); > > @@ -476,6 +481,9 @@ static int exynos5_usbdrd_phy_power_off(struct phy *phy) > /* Power-off the PHY */ > inst->phy_cfg->phy_isol(inst, 1); > > + /* Toggle VBUS gpio - off */ > + gpio_set_value(phy_drd->gpio, 0); > + > if (!IS_ERR(phy_drd->usb30_sclk)) > clk_disable_unprepare(phy_drd->usb30_sclk); > > @@ -585,6 +593,16 @@ static int exynos5_usbdrd_phy_probe(struct platform_device *pdev) > > phy_drd->drv_data = drv_data; > > + /* Get required GPIO for vbus */ > + phy_drd->gpio = of_get_named_gpio(dev->of_node, > + "samsung,vbus-gpio", 0); Is this dt property documented somewhere? > + if (!gpio_is_valid(phy_drd->gpio)) > + dev_dbg(dev, "no usbdrd-phy vbus gpio defined\n"); No return here? Can the PHY be functional even without the VBUS? Thanks Kishon -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
