From 9d685ed77b1b07411c2a0a3e38f567e17f1a247a Mon Sep 17 00:00:00 2001 From: Sjoerd Simons Date: Wed, 5 Apr 2017 16:06:10 +0200 Subject: phy: rockchip-usb: Add vbus regulator support. On rockchip devices vbus is supplied by a separate power supply, often through a regulator. Add support for describing the the regulator in device-tree following the same convention as several other usb phy's. Signed-off-by: Sjoerd Simons Signed-off-by: Kishon Vijay Abraham I --- drivers/phy/phy-rockchip-usb.c | 19 +++++++++++++++++++ 1 file changed, 19 insertions(+) (limited to 'drivers/phy') diff --git a/drivers/phy/phy-rockchip-usb.c b/drivers/phy/phy-rockchip-usb.c index 734987fa0ad7..3378eeb7a562 100644 --- a/drivers/phy/phy-rockchip-usb.c +++ b/drivers/phy/phy-rockchip-usb.c @@ -66,6 +66,7 @@ struct rockchip_usb_phy { struct phy *phy; bool uart_enabled; struct reset_control *reset; + struct regulator *vbus; }; static int rockchip_usb_phy_power(struct rockchip_usb_phy *phy, @@ -88,6 +89,9 @@ static void rockchip_usb_phy480m_disable(struct clk_hw *hw) struct rockchip_usb_phy, clk480m_hw); + if (phy->vbus) + regulator_disable(phy->vbus); + /* Power down usb phy analog blocks by set siddq 1 */ rockchip_usb_phy_power(phy, 1); } @@ -143,6 +147,14 @@ static int rockchip_usb_phy_power_on(struct phy *_phy) if (phy->uart_enabled) return -EBUSY; + if (phy->vbus) { + int ret; + + ret = regulator_enable(phy->vbus); + if (ret) + return ret; + } + return clk_prepare_enable(phy->clk480m); } @@ -268,6 +280,13 @@ static int rockchip_usb_phy_init(struct rockchip_usb_phy_base *base, } phy_set_drvdata(rk_phy->phy, rk_phy); + rk_phy->vbus = devm_regulator_get_optional(&rk_phy->phy->dev, "vbus"); + if (IS_ERR(rk_phy->vbus)) { + if (PTR_ERR(rk_phy->vbus) == -EPROBE_DEFER) + return PTR_ERR(rk_phy->vbus); + rk_phy->vbus = NULL; + } + /* * When acting as uart-pipe, just keep clock on otherwise * only power up usb phy when it use, so disable it when init -- cgit v1.2.3