gru: kevin: configure board GPIOs

Set board GPIOs as required and add their description into the
appropriate section of the coreboot table, to make them available to
depthcharge.

BRANCH=none
BUG=chrome-os-partner:51537
TEST=with the rest of the patches applied it is possible to use
     keyboard on Gru, which indicates that the EC interrupt GPIO is
     properly configured. The rest of the pins will be verified later.

Change-Id: I5818bfe855f4e7faa2114484a9b7b44c7d469727
Signed-off-by: Martin Roth <martinroth@chromium.org>
Original-Commit-Id: e02a05f
Original-Change-Id: I82be76bbd3211179e696526a34cc842cb1987e69
Original-Signed-off-by: Vadim Bendebury <vbendeb@chromium.org>
Original-Reviewed-on: https://chromium-review.googlesource.com/346631
Reviewed-on: https://review.coreboot.org/15031
Tested-by: build bot (Jenkins)
Reviewed-by: Furquan Shaikh <furquan@google.com>

src/mainboard/google/gru/bootblock.c

@@ -21,6 +21,8 @@
 #include <soc/spi.h>
 #include <console/console.h>
 
+#include "board.h"
+
 void bootblock_mainboard_early_init(void)
 {
 	/* Let gpio2ab io domains works at 1.8V.
@@ -62,4 +64,6 @@ void bootblock_mainboard_init(void)
 	write32(&rk3399_pmugrf->spi1_csclktx, IOMUX_SPI1_CSCLKTX);
 
 	rockchip_spi_init(CONFIG_BOOT_MEDIA_SPI_BUS, 24750*KHz);
+
+	setup_chromeos_gpios();
 }

src/mainboard/google/gru/chromeos.c

@@ -15,15 +15,22 @@
  */
 
 #include <boot/coreboot_tables.h>
+#include <gpio.h>
 #include <vendorcode/google/chromeos/chromeos.h>
 
+#include "board.h"
+
 void fill_lb_gpios(struct lb_gpios *gpios)
 {
-}
+	struct lb_gpio chromeos_gpios[] = {
+		{GPIO_WP.raw, ACTIVE_LOW, gpio_get(GPIO_WP), "write protect"},
+		{GPIO_BACKLIGHT.raw, ACTIVE_HIGH, -1, "backlight"},
+		{GPIO_EC_IN_RW.raw, ACTIVE_HIGH, -1, "EC in RW"},
+		{GPIO_EC_IRQ.raw, ACTIVE_LOW, -1, "EC interrupt"},
+		{GPIO_RESET.raw, ACTIVE_HIGH, -1, "reset"},
+	};
 
-int get_developer_mode_switch(void)
+	lb_add_gpios(gpios, chromeos_gpios, ARRAY_SIZE(chromeos_gpios));
-{
-	return 0;
 }
 
 int get_recovery_mode_switch(void)
@@ -33,5 +40,12 @@ int get_recovery_mode_switch(void)
 
 int get_write_protect_state(void)
 {
-	return 0;
+	return !gpio_get(GPIO_WP);
+}
+
+void setup_chromeos_gpios(void)
+{
+	gpio_input(GPIO_WP);
+	gpio_input_pullup(GPIO_EC_IN_RW);
+	gpio_input_pullup(GPIO_EC_IRQ);
 }

src/soc/rockchip/rk3399/Makefile.inc

@@ -47,6 +47,8 @@ romstage-y += ../common/pwm.c
 romstage-y += timer.c
 romstage-y += romstage.c
 romstage-y += tsadc.c
+romstage-y += gpio.c
+romstage-y += ../common/gpio.c
 
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