From 3c0b9adb898d7abed97707a852d9a074dd68cbea Mon Sep 17 00:00:00 2001 From: Andre Przywara Date: Tue, 7 Jun 2022 23:36:18 +0100 Subject: [PATCH] sunxi: usb: convert PHY GPIO functions to DM MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit The Allwinner USB PHY driver is still using the legacy GPIO interface, which is now implemented by the DM_GPIO compat functions. Those seem to have some design flaws, as setting the direction, then later setting the value will not work, if the DM_GPIO driver is implementing set_flags. Fix this by using the dm_ version of the direct GPIO interface, which uses struct gpio_desc structs to handle requested GPIOs, and actually keeps the flags we set earlier. This fixes USB operation on boards which need to toggle the VBUS supply via a GPIO, like the Teres-I laptop or the BananaPi M2 Berry board. Signed-off-by: Andre Przywara Reported-by: Milan P. Stanić Reviewed-by: Samuel Holland --- drivers/phy/allwinner/phy-sun4i-usb.c | 59 ++++++++++++++++++++--------------- 1 file changed, 33 insertions(+), 26 deletions(-) diff --git a/drivers/phy/allwinner/phy-sun4i-usb.c b/drivers/phy/allwinner/phy-sun4i-usb.c index 86c589a..aef2cb8 100644 --- a/drivers/phy/allwinner/phy-sun4i-usb.c +++ b/drivers/phy/allwinner/phy-sun4i-usb.c @@ -125,9 +125,9 @@ struct sun4i_usb_phy_info { struct sun4i_usb_phy_plat { void __iomem *pmu; - int gpio_vbus; - int gpio_vbus_det; - int gpio_id_det; + struct gpio_desc gpio_vbus; + struct gpio_desc gpio_vbus_det; + struct gpio_desc gpio_id_det; struct clk clocks; struct reset_ctl resets; int id; @@ -224,8 +224,8 @@ static int sun4i_usb_phy_power_on(struct phy *phy) initial_usb_scan_delay = 0; } - if (usb_phy->gpio_vbus >= 0) - gpio_set_value(usb_phy->gpio_vbus, SUNXI_GPIO_PULL_UP); + if (dm_gpio_is_valid(&usb_phy->gpio_vbus)) + dm_gpio_set_value(&usb_phy->gpio_vbus, 1); return 0; } @@ -235,8 +235,8 @@ static int sun4i_usb_phy_power_off(struct phy *phy) struct sun4i_usb_phy_data *data = dev_get_priv(phy->dev); struct sun4i_usb_phy_plat *usb_phy = &data->usb_phy[phy->id]; - if (usb_phy->gpio_vbus >= 0) - gpio_set_value(usb_phy->gpio_vbus, SUNXI_GPIO_PULL_DISABLE); + if (dm_gpio_is_valid(&usb_phy->gpio_vbus)) + dm_gpio_set_value(&usb_phy->gpio_vbus, 0); return 0; } @@ -386,8 +386,8 @@ int sun4i_usb_phy_vbus_detect(struct phy *phy) struct sun4i_usb_phy_plat *usb_phy = &data->usb_phy[phy->id]; int err = 1, retries = 3; - if (usb_phy->gpio_vbus_det >= 0) { - err = gpio_get_value(usb_phy->gpio_vbus_det); + if (dm_gpio_is_valid(&usb_phy->gpio_vbus_det)) { + err = dm_gpio_get_value(&usb_phy->gpio_vbus_det); /* * Vbus may have been provided by the board and just turned off * some milliseconds ago on reset. What we're measuring then is @@ -395,7 +395,7 @@ int sun4i_usb_phy_vbus_detect(struct phy *phy) */ while (err > 0 && retries--) { mdelay(100); - err = gpio_get_value(usb_phy->gpio_vbus_det); + err = dm_gpio_get_value(&usb_phy->gpio_vbus_det); } } else if (data->vbus_power_supply) { err = regulator_get_enable(data->vbus_power_supply); @@ -409,10 +409,10 @@ int sun4i_usb_phy_id_detect(struct phy *phy) struct sun4i_usb_phy_data *data = dev_get_priv(phy->dev); struct sun4i_usb_phy_plat *usb_phy = &data->usb_phy[phy->id]; - if (usb_phy->gpio_id_det < 0) - return usb_phy->gpio_id_det; + if (!dm_gpio_is_valid(&usb_phy->gpio_id_det)) + return -1; - return gpio_get_value(usb_phy->gpio_id_det); + return dm_gpio_get_value(&usb_phy->gpio_id_det); } void sun4i_usb_phy_set_squelch_detect(struct phy *phy, bool enabled) @@ -454,35 +454,42 @@ static int sun4i_usb_phy_probe(struct udevice *dev) if (data->cfg->missing_phys & BIT(i)) continue; - phy->gpio_vbus = sunxi_name_to_gpio(info->gpio_vbus); - if (phy->gpio_vbus >= 0) { - ret = gpio_request(phy->gpio_vbus, "usb_vbus"); + ret = dm_gpio_lookup_name(info->gpio_vbus, &phy->gpio_vbus); + if (ret == 0) { + ret = dm_gpio_request(&phy->gpio_vbus, "usb_vbus"); if (ret) return ret; - ret = gpio_direction_output(phy->gpio_vbus, 0); + ret = dm_gpio_set_dir_flags(&phy->gpio_vbus, + GPIOD_IS_OUT); + if (ret) + return ret; + ret = dm_gpio_set_value(&phy->gpio_vbus, 0); if (ret) return ret; } - phy->gpio_vbus_det = sunxi_name_to_gpio(info->gpio_vbus_det); - if (phy->gpio_vbus_det >= 0) { - ret = gpio_request(phy->gpio_vbus_det, "usb_vbus_det"); + ret = dm_gpio_lookup_name(info->gpio_vbus_det, + &phy->gpio_vbus_det); + if (ret == 0) { + ret = dm_gpio_request(&phy->gpio_vbus_det, + "usb_vbus_det"); if (ret) return ret; - ret = gpio_direction_input(phy->gpio_vbus_det); + ret = dm_gpio_set_dir_flags(&phy->gpio_vbus_det, + GPIOD_IS_IN); if (ret) return ret; } - phy->gpio_id_det = sunxi_name_to_gpio(info->gpio_id_det); - if (phy->gpio_id_det >= 0) { - ret = gpio_request(phy->gpio_id_det, "usb_id_det"); + ret = dm_gpio_lookup_name(info->gpio_id_det, &phy->gpio_id_det); + if (ret == 0) { + ret = dm_gpio_request(&phy->gpio_id_det, "usb_id_det"); if (ret) return ret; - ret = gpio_direction_input(phy->gpio_id_det); + ret = dm_gpio_set_dir_flags(&phy->gpio_id_det, + GPIOD_IS_IN | GPIOD_PULL_UP); if (ret) return ret; - sunxi_gpio_set_pull(phy->gpio_id_det, SUNXI_GPIO_PULL_UP); } if (data->cfg->dedicated_clocks) -- 2.7.4