x86: chromebook_link: Enable GPIO support

Enable GPIO support and provide the required GPIO setup information to
the driver.

Signed-off-by: Simon Glass <sjg@chromium.org>

arch/x86/dts/link.dts

@@ -14,18 +14,21 @@
 
 	gpioa {
 		compatible = "intel,ich6-gpio";
+		u-boot,dm-pre-reloc;
 		reg = <0 0x10>;
 		bank-name = "A";
 	};
 
 	gpiob {
 		compatible = "intel,ich6-gpio";
+		u-boot,dm-pre-reloc;
 		reg = <0x30 0x10>;
 		bank-name = "B";
 	};
 
 	gpioc {
 		compatible = "intel,ich6-gpio";
+		u-boot,dm-pre-reloc;
 		reg = <0x40 0x10>;
 		bank-name = "C";
 	};

board/google/chromebook_link/link.c

@@ -5,6 +5,7 @@
  */
 
 #include <common.h>
+#include <asm/gpio.h>
 
 int arch_early_init_r(void)
 {
@@ -15,3 +16,109 @@ int board_early_init_r(void)
 {
 	return 0;
 }
+
+static const struct pch_gpio_set1 pch_gpio_set1_mode = {
+	.gpio0 = GPIO_MODE_GPIO,  /* NMI_DBG# */
+	.gpio3 = GPIO_MODE_GPIO,  /* ALS_INT# */
+	.gpio5 = GPIO_MODE_GPIO,  /* SIM_DET */
+	.gpio7 = GPIO_MODE_GPIO,  /* EC_SCI# */
+	.gpio8 = GPIO_MODE_GPIO,  /* EC_SMI# */
+	.gpio9 = GPIO_MODE_GPIO,  /* RECOVERY# */
+	.gpio10 = GPIO_MODE_GPIO, /* SPD vector D3 */
+	.gpio11 = GPIO_MODE_GPIO, /* smbalert#, let's keep it initialized */
+	.gpio12 = GPIO_MODE_GPIO, /* TP_INT# */
+	.gpio14 = GPIO_MODE_GPIO, /* Touch_INT_L */
+	.gpio15 = GPIO_MODE_GPIO, /* EC_LID_OUT# (EC_WAKE#) */
+	.gpio21 = GPIO_MODE_GPIO, /* EC_IN_RW */
+	.gpio24 = GPIO_MODE_GPIO, /* DDR3L_EN */
+	.gpio28 = GPIO_MODE_GPIO, /* SLP_ME_CSW_DEV# */
+};
+
+static const struct pch_gpio_set1 pch_gpio_set1_direction = {
+	.gpio0 = GPIO_DIR_INPUT,
+	.gpio3 = GPIO_DIR_INPUT,
+	.gpio5 = GPIO_DIR_INPUT,
+	.gpio7 = GPIO_DIR_INPUT,
+	.gpio8 = GPIO_DIR_INPUT,
+	.gpio9 = GPIO_DIR_INPUT,
+	.gpio10 = GPIO_DIR_INPUT,
+	.gpio11 = GPIO_DIR_INPUT,
+	.gpio12 = GPIO_DIR_INPUT,
+	.gpio14 = GPIO_DIR_INPUT,
+	.gpio15 = GPIO_DIR_INPUT,
+	.gpio21 = GPIO_DIR_INPUT,
+	.gpio24 = GPIO_DIR_OUTPUT,
+	.gpio28 = GPIO_DIR_INPUT,
+};
+
+static const struct pch_gpio_set1 pch_gpio_set1_level = {
+	.gpio1 = GPIO_LEVEL_HIGH,
+	.gpio6 = GPIO_LEVEL_HIGH,
+	.gpio24 = GPIO_LEVEL_LOW,
+};
+
+static const struct pch_gpio_set1 pch_gpio_set1_invert = {
+	.gpio7 = GPIO_INVERT,
+	.gpio8 = GPIO_INVERT,
+	.gpio12 = GPIO_INVERT,
+	.gpio14 = GPIO_INVERT,
+	.gpio15 = GPIO_INVERT,
+};
+
+static const struct pch_gpio_set2 pch_gpio_set2_mode = {
+	.gpio36 = GPIO_MODE_GPIO, /* W_DISABLE_L */
+	.gpio41 = GPIO_MODE_GPIO, /* SPD vector D0 */
+	.gpio42 = GPIO_MODE_GPIO, /* SPD vector D1 */
+	.gpio43 = GPIO_MODE_GPIO, /* SPD vector D2 */
+	.gpio57 = GPIO_MODE_GPIO, /* PCH_SPI_WP_D */
+	.gpio60 = GPIO_MODE_GPIO, /* DRAMRST_CNTRL_PCH */
+};
+
+static const struct pch_gpio_set2 pch_gpio_set2_direction = {
+	.gpio36 = GPIO_DIR_OUTPUT,
+	.gpio41 = GPIO_DIR_INPUT,
+	.gpio42 = GPIO_DIR_INPUT,
+	.gpio43 = GPIO_DIR_INPUT,
+	.gpio57 = GPIO_DIR_INPUT,
+	.gpio60 = GPIO_DIR_OUTPUT,
+};
+
+static const struct pch_gpio_set2 pch_gpio_set2_level = {
+	.gpio36 = GPIO_LEVEL_HIGH,
+	.gpio60 = GPIO_LEVEL_HIGH,
+};
+
+static const struct pch_gpio_set3 pch_gpio_set3_mode = {
+};
+
+static const struct pch_gpio_set3 pch_gpio_set3_direction = {
+};
+
+static const struct pch_gpio_set3 pch_gpio_set3_level = {
+};
+
+static const struct pch_gpio_map link_gpio_map = {
+	.set1 = {
+		.mode      = &pch_gpio_set1_mode,
+		.direction = &pch_gpio_set1_direction,
+		.level     = &pch_gpio_set1_level,
+		.invert    = &pch_gpio_set1_invert,
+	},
+	.set2 = {
+		.mode      = &pch_gpio_set2_mode,
+		.direction = &pch_gpio_set2_direction,
+		.level     = &pch_gpio_set2_level,
+	},
+	.set3 = {
+		.mode      = &pch_gpio_set3_mode,
+		.direction = &pch_gpio_set3_direction,
+		.level     = &pch_gpio_set3_level,
+	},
+};
+
+int board_early_init_f(void)
+{
+	ich_gpio_set_gpio_map(&link_gpio_map);
+
+	return 0;
+}

include/configs/chromebook_link.h

@@ -19,6 +19,7 @@
 #define CONFIG_SYS_CAR_SIZE			(128 * 1024)
 #define CONFIG_SYS_MONITOR_LEN			(1 << 20)
 #define CONFIG_SYS_X86_START16			0xfffff800
+#define CONFIG_BOARD_EARLY_INIT_F
 #define CONFIG_BOARD_EARLY_INIT_R
 
 #define CONFIG_X86_RESET_VECTOR
@@ -40,9 +41,6 @@
  * follow-on patches in this series. Add undefs here to avoid every patch
  * having to put things back into x86-common.h
  */
-#undef CONFIG_INTEL_ICH6_GPIO
-#undef CONFIG_DM_GPIO
-#undef CONFIG_CMD_GPIO
 #undef CONFIG_VIDEO
 #undef CONFIG_CFB_CONSOLE
 #undef CONFIG_ICH_SPI