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usb: chipidea: Add support for 'phy-clkgate-delay-us' property

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Add support for the optional 'phy-clkgate-delay-us' property that is
used to describe the delay time between putting PHY into low power mode
and turning off the PHY clock.

Signed-off-by: Li Jun <jun.li@freescale.com>
Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
Signed-off-by: Peter Chen <peter.chen@freescale.com>
This commit is contained in:
Fabio Estevam 2015-09-08 22:18:14 -03:00 committed by Peter Chen
parent 3ecb3e09b0
commit 1fbf46280e
2 changed files with 8 additions and 0 deletions
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7
drivers/usb/chipidea/core.c
View File

@ -688,6 +688,10 @@ static int ci_get_platdata(struct device *dev,
if (of_usb_get_maximum_speed(dev->of_node) == USB_SPEED_FULL)
platdata->flags |= CI_HDRC_FORCE_FULLSPEED;
if (of_find_property(dev->of_node, "phy-clkgate-delay-us", NULL))
of_property_read_u32(dev->of_node, "phy-clkgate-delay-us",
&platdata->phy_clkgate_delay_us);
platdata->itc_setting = 1;
if (of_find_property(dev->of_node, "itc-setting", NULL)) {
ret = of_property_read_u32(dev->of_node, "itc-setting",
@ -1121,6 +1125,9 @@ static void ci_controller_suspend(struct ci_hdrc *ci)
{
disable_irq(ci->irq);
ci_hdrc_enter_lpm(ci, true);
if (ci->platdata->phy_clkgate_delay_us)
usleep_range(ci->platdata->phy_clkgate_delay_us,
ci->platdata->phy_clkgate_delay_us + 50);
usb_phy_set_suspend(ci->usb_phy, 1);
ci->in_lpm = true;
enable_irq(ci->irq);

1
include/linux/usb/chipidea.h
View File

@ -71,6 +71,7 @@ struct ci_hdrc_platform_data {
/* VBUS and ID signal state tracking, using extcon framework */
struct ci_hdrc_cable vbus_extcon;
struct ci_hdrc_cable id_extcon;
u32 phy_clkgate_delay_us;
};
/* Default offset of capability registers */