diff options
| author | Vivek Gautam <gautam.vivek@samsung.com> | 2014-05-13 15:30:17 +0530 |
|---|---|---|
| committer | Kishon Vijay Abraham I <kishon@ti.com> | 2014-05-13 18:07:08 +0530 |
| commit | 4fc8a4e65fda3271357bbea933206851736894da (patch) | |
| tree | c4bc83882d0d81aaab42739b8d3bc8fdefdd0b5e /drivers/phy/phy-exynos5-usbdrd.c | |
| parent | 59025887fb08a8b913605fb20f8a62eb0bb69b36 (diff) | |
| download | lwn-4fc8a4e65fda3271357bbea933206851736894da.tar.gz lwn-4fc8a4e65fda3271357bbea933206851736894da.zip | |
phy: exynos5-usbdrd: Add facility for VBUS supply
Adding support to enable/disable VBUS controlled by a
regulator, to enable vbus supply on the port.
Signed-off-by: Vivek Gautam <gautam.vivek@samsung.com>
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
Diffstat (limited to 'drivers/phy/phy-exynos5-usbdrd.c')
| -rw-r--r-- | drivers/phy/phy-exynos5-usbdrd.c | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/drivers/phy/phy-exynos5-usbdrd.c b/drivers/phy/phy-exynos5-usbdrd.c index 8fcdd9434346..76d862b2202f 100644 --- a/drivers/phy/phy-exynos5-usbdrd.c +++ b/drivers/phy/phy-exynos5-usbdrd.c @@ -24,6 +24,7 @@ #include <linux/mfd/syscon.h> #include <linux/mfd/syscon/exynos5-pmu.h> #include <linux/regmap.h> +#include <linux/regulator/consumer.h> /* Exynos USB PHY registers */ #define EXYNOS5_FSEL_9MHZ6 0x0 @@ -170,6 +171,7 @@ struct exynos5_usbdrd_phy { } phys[EXYNOS5_DRDPHYS_NUM]; u32 extrefclk; struct clk *ref_clk; + struct regulator *vbus; }; static inline @@ -438,6 +440,7 @@ static int exynos5_usbdrd_phy_exit(struct phy *phy) static int exynos5_usbdrd_phy_power_on(struct phy *phy) { + int ret; struct phy_usb_instance *inst = phy_get_drvdata(phy); struct exynos5_usbdrd_phy *phy_drd = to_usbdrd_phy(inst); @@ -445,10 +448,24 @@ static int exynos5_usbdrd_phy_power_on(struct phy *phy) clk_prepare_enable(phy_drd->ref_clk); + /* Enable VBUS supply */ + if (phy_drd->vbus) { + ret = regulator_enable(phy_drd->vbus); + if (ret) { + dev_err(phy_drd->dev, "Failed to enable VBUS supply\n"); + goto fail_vbus; + } + } + /* Power-on PHY*/ inst->phy_cfg->phy_isol(inst, 0); return 0; + +fail_vbus: + clk_disable_unprepare(phy_drd->ref_clk); + + return ret; } static int exynos5_usbdrd_phy_power_off(struct phy *phy) @@ -461,6 +478,10 @@ static int exynos5_usbdrd_phy_power_off(struct phy *phy) /* Power-off the PHY */ inst->phy_cfg->phy_isol(inst, 1); + /* Disable VBUS supply */ + if (phy_drd->vbus) + regulator_disable(phy_drd->vbus); + clk_disable_unprepare(phy_drd->ref_clk); return 0; @@ -600,6 +621,17 @@ static int exynos5_usbdrd_phy_probe(struct platform_device *pdev) break; } + /* Get Vbus regulator */ + phy_drd->vbus = devm_regulator_get(dev, "vbus"); + if (IS_ERR(phy_drd->vbus)) { + ret = PTR_ERR(phy_drd->vbus); + if (ret == -EPROBE_DEFER) + return ret; + + dev_warn(dev, "Failed to get VBUS supply regulator\n"); + phy_drd->vbus = NULL; + } + dev_vdbg(dev, "Creating usbdrd_phy phy\n"); for (i = 0; i < EXYNOS5_DRDPHYS_NUM; i++) { |