Hi Vivek,
> Some Exynos SoCs have a separate regulator controlling a
I guess you meant the Exynos based *boards* instead of SoCs,
since Exynos SoCs don't have any boost regulators.
> 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@xxxxxxxxxxx>
> ---
> drivers/phy/phy-exynos5-usbdrd.c | 30 ++++++++++++++++++++++++++++--
> 1 file changed, 28 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/phy/phy-exynos5-usbdrd.c b/drivers/phy/phy-
> exynos5-usbdrd.c
> index 013ee84..57e8a0a 100644
> --- a/drivers/phy/phy-exynos5-usbdrd.c
> +++ b/drivers/phy/phy-exynos5-usbdrd.c
> @@ -176,6 +176,7 @@ struct exynos5_usbdrd_phy {
> u32 extrefclk;
> struct clk *ref_clk;
> struct regulator *vbus;
> + struct regulator *vbus_boost;
> };
>
> static inline
> @@ -455,11 +456,20 @@ static int exynos5_usbdrd_phy_power_on(struct phy
> *phy)
> clk_prepare_enable(phy_drd->ref_clk);
>
> /* 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;
> }
> }
>
> @@ -468,6 +478,10 @@ 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);
> clk_disable_unprepare(phy_drd->pipeclk);
> @@ -489,6 +503,8 @@ 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);
> clk_disable_unprepare(phy_drd->pipeclk);
> @@ -644,7 +660,7 @@ 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);
> @@ -655,6 +671,16 @@ 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++) {
> --
> 1.7.10.4
>
> --
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