Adding support to enable/disable VBUS hooked to a gpio to enable vbus supply on the port.
Signed-off-by: Vivek Gautam <gautam.vi...@samsung.com> --- 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); + if (!gpio_is_valid(phy_drd->gpio)) + dev_dbg(dev, "no usbdrd-phy vbus gpio defined\n"); + + if (devm_gpio_request(dev, phy_drd->gpio, "phydrd_vbus_gpio")) + dev_dbg(dev, "can't request usbdrd-phy vbus gpio %d\n", + phy_drd->gpio); + if (of_property_read_u32(node, "samsung,pmu-offset", &pmu_offset)) { dev_err(dev, "Missing pmu-offset for phy isolation\n"); return -EINVAL; -- 1.7.10.4 -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
