On Wed, Jan 24, 2018 at 06:14:39PM +0100, Sebastian Reichel wrote:
> Traditionally, PORTSC should be set before initializing ULPI phys. But
> setting PORTSC before powering on the phy results in a kernel freeze
> on imx53 based GE PPD. As a workaround this initializes the phy early
> in the imx platform code and disables phy power management from the
> core.
>
> Signed-off-by: Fabien Lahoudere <fabien.lahoud...@collabora.co.uk>
> Signed-off-by: Sebastian Reichel <sebastian.reic...@collabora.co.uk>
> ---
> drivers/usb/chipidea/ci_hdrc_imx.c | 12 ++++++++++++
> 1 file changed, 12 insertions(+)
>
> diff --git a/drivers/usb/chipidea/ci_hdrc_imx.c
> b/drivers/usb/chipidea/ci_hdrc_imx.c
> index de155c80eb70..e431c5aafe35 100644
> --- a/drivers/usb/chipidea/ci_hdrc_imx.c
> +++ b/drivers/usb/chipidea/ci_hdrc_imx.c
> @@ -83,6 +83,7 @@ struct ci_hdrc_imx_data {
> struct clk *clk;
> struct imx_usbmisc_data *usbmisc_data;
> bool supports_runtime_pm;
> + bool override_phy_control;
> bool in_lpm;
> /* SoC before i.mx6 (except imx23/imx28) needs three clks */
> bool need_three_clks;
> @@ -254,6 +255,7 @@ static int ci_hdrc_imx_probe(struct platform_device *pdev)
> int ret;
> const struct of_device_id *of_id;
> const struct ci_hdrc_imx_platform_flag *imx_platform_flag;
> + struct device_node *np = pdev->dev.of_node;
>
> of_id = of_match_device(ci_hdrc_imx_dt_ids, &pdev->dev);
> if (!of_id)
> @@ -288,6 +290,14 @@ static int ci_hdrc_imx_probe(struct platform_device
> *pdev)
> }
>
> pdata.usb_phy = data->phy;
> +
> + if (of_device_is_compatible(np, "fsl,imx53-usb") && pdata.usb_phy &&
> + of_usb_get_phy_mode(np) == USBPHY_INTERFACE_MODE_ULPI) {
> + pdata.flags |= CI_HDRC_OVERRIDE_PHY_CONTROL;
> + data->override_phy_control = true;
> + usb_phy_init(pdata.usb_phy);
> + }
> +
> pdata.flags |= imx_platform_flag->flags;
> if (pdata.flags & CI_HDRC_SUPPORTS_RUNTIME_PM)
> data->supports_runtime_pm = true;
> @@ -341,6 +351,8 @@ static int ci_hdrc_imx_remove(struct platform_device
> *pdev)
> pm_runtime_put_noidle(&pdev->dev);
> }
> ci_hdrc_remove_device(data->ci_pdev);
> + if (data->override_phy_control)
> + usb_phy_shutdown(data->phy);
> imx_disable_unprepare_clks(&pdev->dev);
>
Sebastian, I have a question, do you have any USB or generic PHY drivers
for ULPI bus, any power controls are needed for your ULPI peripheral?
--
Best Regards,
Peter Chen
