On Monday, April 21, 2014 9:17 PM, Vivek Gautam wrote:
>
> Facilitate getting required 3.3V and 1.0V VDD supply for
> EHCI controller on Exynos.
>
> With patches for regulators' nodes merged in 3.15:
> c8c253f ARM: dts: Add regulator entries to smdk5420
> 275dcd2 ARM: dts: add max77686 pmic node for smdk5250,
>
> certain perripherals will now need to ensure that,
> they request VDD regulators in their drivers, and enable
> them so as to make them working.
>
> Signed-off-by: Vivek Gautam <gautam.vi...@samsung.com>
> Cc: Jingoo Han <jg1....@samsung.com>
Acked-by: Jingoo Han <jg1....@samsung.com>
Best regards,
Jingoo Han
> ---
>
> Based on 'usb-next' branch of Greg's usb tree.
>
> drivers/usb/host/ehci-exynos.c | 47
> ++++++++++++++++++++++++++++++++++++++++
> 1 file changed, 47 insertions(+)
>
> diff --git a/drivers/usb/host/ehci-exynos.c b/drivers/usb/host/ehci-exynos.c
> index d1d8c47..a3ca8cc 100644
> --- a/drivers/usb/host/ehci-exynos.c
> +++ b/drivers/usb/host/ehci-exynos.c
> @@ -20,6 +20,7 @@
> #include <linux/of.h>
> #include <linux/of_gpio.h>
> #include <linux/platform_device.h>
> +#include <linux/regulator/consumer.h>
> #include <linux/usb/phy.h>
> #include <linux/usb/samsung_usb_phy.h>
> #include <linux/usb.h>
> @@ -46,6 +47,8 @@ struct exynos_ehci_hcd {
> struct clk *clk;
> struct usb_phy *phy;
> struct usb_otg *otg;
> + struct regulator *vdd33;
> + struct regulator *vdd10;
> };
>
> #define to_exynos_ehci(hcd) (struct exynos_ehci_hcd
> *)(hcd_to_ehci(hcd)->priv)
> @@ -112,6 +115,28 @@ static int exynos_ehci_probe(struct platform_device
> *pdev)
> exynos_ehci->otg = phy->otg;
> }
>
> + exynos_ehci->vdd33 = devm_regulator_get(&pdev->dev, "vdd33");
> + if (IS_ERR(exynos_ehci->vdd33)) {
> + err = PTR_ERR(exynos_ehci->vdd33);
> + goto fail_regulator1;
> + }
> + err = regulator_enable(exynos_ehci->vdd33);
> + if (err) {
> + dev_err(&pdev->dev, "Failed to enable VDD33 supply\n");
> + goto fail_regulator1;
> + }
> +
> + exynos_ehci->vdd10 = devm_regulator_get(&pdev->dev, "vdd10");
> + if (IS_ERR(exynos_ehci->vdd10)) {
> + err = PTR_ERR(exynos_ehci->vdd10);
> + goto fail_regulator2;
> + }
> + err = regulator_enable(exynos_ehci->vdd10);
> + if (err) {
> + dev_err(&pdev->dev, "Failed to enable VDD10 supply\n");
> + goto fail_regulator2;
> + }
> +
> skip_phy:
>
> exynos_ehci->clk = devm_clk_get(&pdev->dev, "usbhost");
> @@ -178,6 +203,10 @@ fail_add_hcd:
> fail_io:
> clk_disable_unprepare(exynos_ehci->clk);
> fail_clk:
> + regulator_disable(exynos_ehci->vdd10);
> +fail_regulator2:
> + regulator_disable(exynos_ehci->vdd33);
> +fail_regulator1:
> usb_put_hcd(hcd);
> return err;
> }
> @@ -197,6 +226,9 @@ static int exynos_ehci_remove(struct platform_device
> *pdev)
>
> clk_disable_unprepare(exynos_ehci->clk);
>
> + regulator_disable(exynos_ehci->vdd10);
> + regulator_disable(exynos_ehci->vdd33);
> +
> usb_put_hcd(hcd);
>
> return 0;
> @@ -221,6 +253,9 @@ static int exynos_ehci_suspend(struct device *dev)
>
> clk_disable_unprepare(exynos_ehci->clk);
>
> + regulator_disable(exynos_ehci->vdd10);
> + regulator_disable(exynos_ehci->vdd33);
> +
> return rc;
> }
>
> @@ -228,6 +263,18 @@ static int exynos_ehci_resume(struct device *dev)
> {
> struct usb_hcd *hcd = dev_get_drvdata(dev);
> struct exynos_ehci_hcd *exynos_ehci = to_exynos_ehci(hcd);
> + int ret;
> +
> + ret = regulator_enable(exynos_ehci->vdd33);
> + if (ret) {
> + dev_err(dev, "Failed to enable VDD33 supply\n");
> + return ret;
> + }
> + ret = regulator_enable(exynos_ehci->vdd10);
> + if (ret) {
> + dev_err(dev, "Failed to enable VDD10 supply\n");
> + return ret;
> + }
>
> clk_prepare_enable(exynos_ehci->clk);
>
> --
> 1.7.10.4
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