diff options
| author | Vivek Gautam <gautam.vivek@samsung.com> | 2014-11-21 19:05:49 +0530 |
|---|---|---|
| committer | Kishon Vijay Abraham I <kishon@ti.com> | 2014-11-22 14:08:09 +0530 |
| commit | a6867836db35d1e178744166765b57288bf4e8e5 (patch) | |
| tree | 753bc621412a95344ec96bd7e8b9c61baefff7f2 /drivers/phy/phy-exynos5-usbdrd.c | |
| parent | 9bde18c1b5d2c9a1b90fc0f3bbe1a314194f6fdf (diff) | |
| download | linux-a6867836db35d1e178744166765b57288bf4e8e5.tar.bz2 | |
phy: exynos5-usbdrd: Add facility for VBUS-BOOST-5V supply
Some Exynos boards have a separate regulator controlling a
Boost 5V supply which goes as input for VBUS regulator.
So adding a control for the same in driver, 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, 30 insertions, 2 deletions
diff --git a/drivers/phy/phy-exynos5-usbdrd.c b/drivers/phy/phy-exynos5-usbdrd.c index 99ba56dc63dd..04374018425f 100644 --- a/drivers/phy/phy-exynos5-usbdrd.c +++ b/drivers/phy/phy-exynos5-usbdrd.c @@ -159,6 +159,8 @@ struct exynos5_usbdrd_phy_drvdata { * reference clocks' for SS and HS operations * @ref_clk: reference clock to PHY block from which PHY's * operational clocks are derived + * vbus: VBUS regulator for phy + * vbus_boost: Boost regulator for VBUS present on few Exynos boards */ struct exynos5_usbdrd_phy { struct device *dev; @@ -178,6 +180,7 @@ struct exynos5_usbdrd_phy { u32 extrefclk; struct clk *ref_clk; struct regulator *vbus; + struct regulator *vbus_boost; }; static inline @@ -460,11 +463,20 @@ static int exynos5_usbdrd_phy_power_on(struct phy *phy) } /* Enable VBUS supply */ + if (phy_drd->vbus_boost) { + ret = regulator_enable(phy_drd->vbus_boost); + if (ret) { + dev_err(phy_drd->dev, + "Failed to enable VBUS boost supply\n"); + goto fail_vbus; + } + } + 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; + goto fail_vbus_boost; } } @@ -473,6 +485,10 @@ static int exynos5_usbdrd_phy_power_on(struct phy *phy) return 0; +fail_vbus_boost: + if (phy_drd->vbus_boost) + regulator_disable(phy_drd->vbus_boost); + fail_vbus: clk_disable_unprepare(phy_drd->ref_clk); if (!phy_drd->drv_data->has_common_clk_gate) { @@ -497,6 +513,8 @@ static int exynos5_usbdrd_phy_power_off(struct phy *phy) /* Disable VBUS supply */ if (phy_drd->vbus) regulator_disable(phy_drd->vbus); + if (phy_drd->vbus_boost) + regulator_disable(phy_drd->vbus_boost); clk_disable_unprepare(phy_drd->ref_clk); if (!phy_drd->drv_data->has_common_clk_gate) { @@ -690,7 +708,7 @@ static int exynos5_usbdrd_phy_probe(struct platform_device *pdev) break; } - /* Get Vbus regulator */ + /* Get Vbus regulators */ phy_drd->vbus = devm_regulator_get(dev, "vbus"); if (IS_ERR(phy_drd->vbus)) { ret = PTR_ERR(phy_drd->vbus); @@ -701,6 +719,16 @@ static int exynos5_usbdrd_phy_probe(struct platform_device *pdev) phy_drd->vbus = NULL; } + phy_drd->vbus_boost = devm_regulator_get(dev, "vbus-boost"); + if (IS_ERR(phy_drd->vbus_boost)) { + ret = PTR_ERR(phy_drd->vbus_boost); + if (ret == -EPROBE_DEFER) + return ret; + + dev_warn(dev, "Failed to get VBUS boost supply regulator\n"); + phy_drd->vbus_boost = NULL; + } + dev_vdbg(dev, "Creating usbdrd_phy phy\n"); for (i = 0; i < EXYNOS5_DRDPHYS_NUM; i++) { |