Add an optional GPIO in the dtb description that will be used to reset the connected hub (if any).
Signed-off-by: Adrien Grassein <[email protected]> --- drivers/phy/freescale/phy-fsl-imx8mq-usb.c | 17 +++++++++++++++++ 1 file changed, 17 insertions(+) diff --git a/drivers/phy/freescale/phy-fsl-imx8mq-usb.c b/drivers/phy/freescale/phy-fsl-imx8mq-usb.c index a29b4a6f7c24..00abf7814fe9 100644 --- a/drivers/phy/freescale/phy-fsl-imx8mq-usb.c +++ b/drivers/phy/freescale/phy-fsl-imx8mq-usb.c @@ -4,6 +4,7 @@ #include <linux/bitfield.h> #include <linux/clk.h> #include <linux/delay.h> +#include <linux/gpio/consumer.h> #include <linux/io.h> #include <linux/module.h> #include <linux/of_platform.h> @@ -36,6 +37,7 @@ struct imx8mq_usb_phy { struct clk *clk; void __iomem *base; struct regulator *vbus; + struct gpio_desc *reset_gpio; }; static int imx8mq_usb_phy_init(struct phy *phy) @@ -111,6 +113,9 @@ static int imx8mq_phy_power_on(struct phy *phy) if (ret) return ret; + if (imx_phy->reset_gpio) + gpiod_set_value_cansleep(imx_phy->reset_gpio, 0); + return clk_prepare_enable(imx_phy->clk); } @@ -120,6 +125,8 @@ static int imx8mq_phy_power_off(struct phy *phy) clk_disable_unprepare(imx_phy->clk); regulator_disable(imx_phy->vbus); + if (imx_phy->reset_gpio) + gpiod_set_value_cansleep(imx_phy->reset_gpio, 1); return 0; } @@ -153,6 +160,7 @@ static int imx8mq_usb_phy_probe(struct platform_device *pdev) struct device *dev = &pdev->dev; struct imx8mq_usb_phy *imx_phy; const struct phy_ops *phy_ops; + int ret; imx_phy = devm_kzalloc(dev, sizeof(*imx_phy), GFP_KERNEL); if (!imx_phy) @@ -180,6 +188,15 @@ static int imx8mq_usb_phy_probe(struct platform_device *pdev) if (IS_ERR(imx_phy->vbus)) return PTR_ERR(imx_phy->vbus); + imx_phy->reset_gpio = devm_gpiod_get_optional(dev, "reset", GPIOD_OUT_HIGH); + if (IS_ERR(imx_phy->reset_gpio)) { + ret = PTR_ERR(imx_phy->reset_gpio); + if (ret == -ENXIO || ret == -ENODEV) + imx_phy->reset_gpio = NULL; + else + return PTR_ERR(imx_phy->reset_gpio); + } + phy_set_drvdata(imx_phy->phy, imx_phy); phy_provider = devm_of_phy_provider_register(dev, of_phy_simple_xlate); -- 2.25.1
