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usb: chipidea: imx: Fix ULPI on imx53 

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.lahoudere@collabora.co.uk>
Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.co.uk>
Signed-off-by: Peter Chen <peter.chen@nxp.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Sebastian Reichel 2018-03-29 17:52:49 +08:00 committed by Greg Kroah-Hartman
parent 04e163794b
commit be9cae2479
1 changed files with 12 additions and 0 deletions
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12
drivers/usb/chipidea/ci_hdrc_imx.c
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@ -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);
return 0;