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[ARM] tegra: usb_phy: Reset the ulpi phy on power off

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Put the ulpi phy in reset on power off to save power in lp0.

Change-Id: I7d7441c1029b170ff24da7274d8404b4bcf1d9e9
Signed-off-by: Benoit Goby <benoit@android.com>
This commit is contained in:
Benoit Goby 2010-09-13 17:43:44 -07:00 • committed by Colin Cross
commit 70cdef2fc2
1 changed files with 2 additions and 21 deletions
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23
arch/arm/mach-tegra/usb_phy.c
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@ -556,27 +556,7 @@ static void ulpi_phy_power_off(struct tegra_usb_phy *phy)
{
unsigned long val;
void __iomem *base = phy->regs;
/* Programming the ULPI register function control */
ulpi_viewport_write(phy, 0x04, 0x4D);
/* Resetting the ULPI register IndicatorPassThru */
ulpi_viewport_write(phy, 0x09, 0x40);
/* USB Interrupt Rising - making sure vbus comparator and id are off */
ulpi_viewport_write(phy, 0x0D, 0x00);
/* USB Interrupt Falling */
ulpi_viewport_write(phy, 0x10, 0x00);
/* Carkit Control */
ulpi_viewport_write(phy, 0x19, 0x00);
/* Disabling ID float Rise/Fall (Carkit Enable) */
ulpi_viewport_write(phy, 0x1D, 0x00);
/* USB I/O and power */
ulpi_viewport_write(phy, 0x39, 0x00);
struct tegra_ulpi_config *config = phy->config;
/* Clear WKCN/WKDS/WKOC wake-on events that can cause the USB
* Controller to immediately bring the ULPI PHY out of low power
@ -585,6 +565,7 @@ static void ulpi_phy_power_off(struct tegra_usb_phy *phy)
val &= ~(USB_PORTSC1_WKOC | USB_PORTSC1_WKDS | USB_PORTSC1_WKCN);
writel(val, base + USB_PORTSC1);
gpio_direction_output(config->reset_gpio, 0);
clk_disable(phy->clk);
}