ryu: fix power button polarity

The power button signal is driven from the silego part.
It's active high when the button is pressed.

BUG=None
BRANCH=None
TEST=Booted with power button pressed. vboot saw the press and
     requested a shut down.

Change-Id: Ifff1bd8d4340849e0c218812fd401b61c90c5743
Signed-off-by: Patrick Georgi <pgeorgi@chromium.org>
Original-Commit-Id: b6bd7c0de38e1078b85f1671493c6d2948d43149
Original-Change-Id: If25ebce28c1ab5a363f3b4b5ab9fc24baebad56a
Original-Signed-off-by: Aaron Durbin <adurbin@chromium.org>
Original-Reviewed-on: https://chromium-review.googlesource.com/214847
Original-Reviewed-by: Furquan Shaikh <furquan@chromium.org>
Reviewed-on: http://review.coreboot.org/9028
Tested-by: build bot (Jenkins)
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>

src/mainboard/google/rush_ryu/chromeos.c

@@ -48,9 +48,9 @@ void fill_lb_gpios(struct lb_gpios *gpios)
 	/* TODO(adurbin): add lid switch */
 
 	/* Power: active low */
-	gpios->gpios[count].port = POWER_BUTTON_L_INDEX,
-	gpios->gpios[count].polarity = ACTIVE_LOW;
-	gpios->gpios[count].value = 1;
+	gpios->gpios[count].port = POWER_BUTTON_INDEX,
+	gpios->gpios[count].polarity = ACTIVE_HIGH;
+	gpios->gpios[count].value = gpio_get_in_value(POWER_BUTTON);
 	strncpy((char *)gpios->gpios[count].name, "power",
 		GPIO_MAX_NAME_LENGTH);
 	count++;

src/mainboard/google/rush_ryu/gpio.h

@@ -46,10 +46,10 @@ enum {
 	SPI_1V8_WP_L	= GPIO(R1),
 	WRITE_PROTECT_L	= SPI_1V8_WP_L,
 	WRITE_PROTECT_L_INDEX = GPIO_R1_INDEX,
-	/* Power Button */
+	/* Power Button -- actually active high, but the net names are off. */
 	BTN_AP_PWR_L	= GPIO(Q0),
-	POWER_BUTTON_L	= BTN_AP_PWR_L,
-	POWER_BUTTON_L_INDEX = GPIO_Q0_INDEX,
+	POWER_BUTTON	= BTN_AP_PWR_L,
+	POWER_BUTTON_INDEX = GPIO_Q0_INDEX,
 };
 
 #endif /* __MAINBOARD_GOOGLE_RUSH_RYU_GPIO_H__ */

src/mainboard/google/rush_ryu/romstage.c

@@ -39,6 +39,8 @@ static const struct pad_config padcfgs[] = {
 	PAD_CFG_GPIO_OUT0(KB_ROW12, PINMUX_PULL_DOWN),
 	/* MDM_DET - expected to be pulled down by LTE modem */
 	PAD_CFG_GPIO_INPUT(GPIO_PV1, PINMUX_PULL_UP),
+	/* Power Button - active high */
+	PAD_CFG_GPIO_INPUT(KB_COL0, PINMUX_PULL_UP),
 };
 
 static const struct pad_config tpm_pads[] = {