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Commit 4d45dcdd authored by Pavankumar Kondeti's avatar Pavankumar Kondeti
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USB: ice40-hcd: Put the gpio in sleep state during suspend 



The bridge chip is completely power collapsed during suspend.
Put the gpio in sleep state during suspend and put them back
in default state during resume.

Change-Id: If326a44f463982a1674fe1f56be56c6972c2bc79
CRs-Fixed: 658474
Signed-off-by: default avatarPavankumar Kondeti <pkondeti@codeaurora.org>
parent ba0c6a25

drivers/usb/host/ice40-hcd.c

+19 −0
Original line number Diff line number Diff line
@@ -1371,6 +1371,7 @@ static void ice40_spi_power_off(struct ice40_hcd *ihcd); 
static int ice40_bus_suspend(struct usb_hcd *hcd)

{

	struct ice40_hcd *ihcd = hcd_to_ihcd(hcd);

	struct pinctrl_state *s;



	trace_ice40_bus_suspend(0); /* start */
@@ -1396,6 +1397,10 @@ static int ice40_bus_suspend(struct usb_hcd *hcd) 
	ice40_spi_power_off(ihcd);

	ice40_spi_clock_disable(ihcd);



	s = pinctrl_lookup_state(ihcd->pinctrl, PINCTRL_STATE_SLEEP);

	if (!IS_ERR(s))

		pinctrl_select_state(ihcd->pinctrl, s);



	trace_ice40_bus_suspend(1); /* successful */

	pm_relax(&ihcd->spi->dev);

	return 0;
@@ -1405,11 +1410,17 @@ static int ice40_spi_load_fw(struct ice40_hcd *ihcd); 
static int ice40_bus_resume(struct usb_hcd *hcd)

{

	struct ice40_hcd *ihcd = hcd_to_ihcd(hcd);

	struct pinctrl_state *s;

	u8 ctrl0;

	int ret, i;



	pm_stay_awake(&ihcd->spi->dev);

	trace_ice40_bus_resume(0); /* start */



	s = pinctrl_lookup_state(ihcd->pinctrl, PINCTRL_STATE_DEFAULT);

	if (!IS_ERR(s))

		pinctrl_select_state(ihcd->pinctrl, s);



	/*

	 * Power up the bridge chip and load the configuration file.

	 * Re-program the previous settings. For now we need to
@@ -1549,6 +1560,8 @@ static void ice40_spi_clock_disable(struct ice40_hcd *ihcd) 
	if (ihcd->xo_clk)

		clk_disable_unprepare(ihcd->xo_clk);



	if (ihcd->clk_en_gpio)

		gpio_direction_input(ihcd->clk_en_gpio);

	ihcd->clocked = false;

}
@@ -1597,6 +1610,12 @@ static void ice40_spi_power_off(struct ice40_hcd *ihcd) 
	if (ihcd->gpio_vcc)

		regulator_disable(ihcd->gpio_vcc);



	/*

	 * Unused gpio should be in input mode for

	 * low power consumption.

	 */

	gpio_direction_input(ihcd->vcc_en_gpio);

	gpio_direction_input(ihcd->reset_gpio);

	ihcd->powered = false;

}