On Mon, Oct 13, 2014 at 10:36 AM, Anton Tikhomirov
<av.tikhomirov@xxxxxxxxxxx> wrote:
> 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.
Right, should be boards instead. Thanks for pointing it out.
>
>> 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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>
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--
Best Regards
Vivek Gautam
Samsung R&D Institute, Bangalore
India
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