[PATCH 1/4] platform/x86: x86-android-tablets: convert Goodix devices to GPIO references

[Dmitry Torokhov <dmitry.torokhov@gmail.com>]

Now that gpiolib supports software nodes to describe GPIOs, switch the
driver away from using GPIO lookup tables for Goodex touchscreens to using
PROPERTY_ENTRY_GPIO() to keep all touchscreen properties together.

Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
---
 drivers/platform/x86/x86-android-tablets.c | 85 +++++++++++-----------
 1 file changed, 44 insertions(+), 41 deletions(-)

diff --git a/drivers/platform/x86/x86-android-tablets.c b/drivers/platform/x86/x86-android-tablets.c
index 111b007656fc..e187fb66b6d7 100644
--- a/drivers/platform/x86/x86-android-tablets.c
+++ b/drivers/platform/x86/x86-android-tablets.c
@@ -17,6 +17,7 @@
 #include <linux/gpio/consumer.h>
 #include <linux/gpio/driver.h>
 #include <linux/gpio/machine.h>
+#include <linux/gpio/property.h>
 #include <linux/i2c.h>
 #include <linux/input.h>
 #include <linux/irq.h>
@@ -184,6 +185,20 @@ struct x86_dev_info {
 	void (*exit)(void);
 };
 
+/* Software nodes representing GPIO chips used by varios devices below */
+static const struct software_node int33fc_gpiochip_nodes[] = {
+	{ .name = "INT33FC:00" },
+	{ .name = "INT33FC:01" },
+	{ .name = "INT33FC:02" },
+};
+
+static const struct software_node *int33fc_gpiochip_node_group[] = {
+	&int33fc_gpiochip_nodes[0],
+	&int33fc_gpiochip_nodes[1],
+	&int33fc_gpiochip_nodes[2],
+	NULL
+};
+
 /* Generic / shared charger / battery settings */
 static const char * const tusb1211_chg_det_psy[] = { "tusb1211-charger-detect" };
 static const char * const bq24190_psy[] = { "bq24190-charger" };
@@ -400,6 +415,18 @@ static const struct software_node asus_me176c_ug3105_node = {
 	.properties = asus_me176c_ug3105_props,
 };
 
+static const struct property_entry asus_me176c_touchscreen_props[] = {
+	PROPERTY_ENTRY_GPIO("reset-gpios",
+			    &int33fc_gpiochip_nodes[0], 60, GPIO_ACTIVE_HIGH),
+	PROPERTY_ENTRY_GPIO("irq-gpios",
+			    &int33fc_gpiochip_nodes[2], 28, GPIO_ACTIVE_HIGH),
+	{ }
+};
+
+static const struct software_node asus_me176c_touchscreen_node = {
+	.properties = asus_me176c_touchscreen_props,
+};
+
 static const struct x86_i2c_client_info asus_me176c_i2c_clients[] __initconst = {
 	{
 		/* bq24297 battery charger */
@@ -455,6 +482,7 @@ static const struct x86_i2c_client_info asus_me176c_i2c_clients[] __initconst =
 			.type = "GDIX1001:00",
 			.addr = 0x14,
 			.dev_name = "goodix_ts",
+			.swnode = &asus_me176c_touchscreen_node,
 		},
 		.adapter_path = "\\_SB_.I2C6",
 		.irq_data = {
@@ -475,18 +503,8 @@ static const struct x86_serdev_info asus_me176c_serdevs[] __initconst = {
 	},
 };
 
-static struct gpiod_lookup_table asus_me176c_goodix_gpios = {
-	.dev_id = "i2c-goodix_ts",
-	.table = {
-		GPIO_LOOKUP("INT33FC:00", 60, "reset", GPIO_ACTIVE_HIGH),
-		GPIO_LOOKUP("INT33FC:02", 28, "irq", GPIO_ACTIVE_HIGH),
-		{ }
-	},
-};
-
 static struct gpiod_lookup_table * const asus_me176c_gpios[] = {
 	&int3496_gpo2_pin22_gpios,
-	&asus_me176c_goodix_gpios,
 	NULL
 };
 
@@ -1181,6 +1199,10 @@ static const struct software_node medion_lifetab_s10346_accel_node = {
 static const struct property_entry medion_lifetab_s10346_touchscreen_props[] = {
 	PROPERTY_ENTRY_BOOL("touchscreen-inverted-x"),
 	PROPERTY_ENTRY_BOOL("touchscreen-swapped-x-y"),
+	PROPERTY_ENTRY_GPIO("reset-gpios",
+			    &int33fc_gpiochip_nodes[1], 26, GPIO_ACTIVE_HIGH),
+	PROPERTY_ENTRY_GPIO("irq-gpios",
+			    &int33fc_gpiochip_nodes[2], 3, GPIO_ACTIVE_HIGH),
 	{ }
 };
 
@@ -1223,24 +1245,9 @@ static const struct x86_i2c_client_info medion_lifetab_s10346_i2c_clients[] __in
 	},
 };
 
-static struct gpiod_lookup_table medion_lifetab_s10346_goodix_gpios = {
-	.dev_id = "i2c-goodix_ts",
-	.table = {
-		GPIO_LOOKUP("INT33FC:01", 26, "reset", GPIO_ACTIVE_HIGH),
-		GPIO_LOOKUP("INT33FC:02", 3, "irq", GPIO_ACTIVE_HIGH),
-		{ }
-	},
-};
-
-static struct gpiod_lookup_table * const medion_lifetab_s10346_gpios[] = {
-	&medion_lifetab_s10346_goodix_gpios,
-	NULL
-};
-
 static const struct x86_dev_info medion_lifetab_s10346_info __initconst = {
 	.i2c_client_info = medion_lifetab_s10346_i2c_clients,
 	.i2c_client_count = ARRAY_SIZE(medion_lifetab_s10346_i2c_clients),
-	.gpiod_lookup_tables = medion_lifetab_s10346_gpios,
 };
 
 /* Nextbook Ares 8 tablets have an Android factory img with everything hardcoded */
@@ -1346,6 +1353,10 @@ static const struct property_entry whitelabel_tm800a550l_goodix_props[] = {
 	PROPERTY_ENTRY_STRING("firmware-name", "gt912-tm800a550l.fw"),
 	PROPERTY_ENTRY_STRING("goodix,config-name", "gt912-tm800a550l.cfg"),
 	PROPERTY_ENTRY_U32("goodix,main-clk", 54),
+	PROPERTY_ENTRY_GPIO("reset-gpios",
+			    &int33fc_gpiochip_nodes[1], 26, GPIO_ACTIVE_HIGH),
+	PROPERTY_ENTRY_GPIO("irq-gpios",
+			    &int33fc_gpiochip_nodes[2], 3, GPIO_ACTIVE_HIGH),
 	{ }
 };
 
@@ -1381,24 +1392,9 @@ static const struct x86_i2c_client_info whitelabel_tm800a550l_i2c_clients[] __in
 	},
 };
 
-static struct gpiod_lookup_table whitelabel_tm800a550l_goodix_gpios = {
-	.dev_id = "i2c-goodix_ts",
-	.table = {
-		GPIO_LOOKUP("INT33FC:01", 26, "reset", GPIO_ACTIVE_HIGH),
-		GPIO_LOOKUP("INT33FC:02", 3, "irq", GPIO_ACTIVE_HIGH),
-		{ }
-	},
-};
-
-static struct gpiod_lookup_table * const whitelabel_tm800a550l_gpios[] = {
-	&whitelabel_tm800a550l_goodix_gpios,
-	NULL
-};
-
 static const struct x86_dev_info whitelabel_tm800a550l_info __initconst = {
 	.i2c_client_info = whitelabel_tm800a550l_i2c_clients,
 	.i2c_client_count = ARRAY_SIZE(whitelabel_tm800a550l_i2c_clients),
-	.gpiod_lookup_tables = whitelabel_tm800a550l_gpios,
 };
 
 /*
@@ -1691,6 +1687,7 @@ static void x86_android_tablet_cleanup(void)
 		gpiod_remove_lookup_table(gpiod_lookup_tables[i]);
 
 	software_node_unregister(bat_swnode);
+	software_node_unregister_node_group(int33fc_gpiochip_node_group);
 }
 
 static __init int x86_android_tablet_init(void)
@@ -1727,11 +1724,17 @@ static __init int x86_android_tablet_init(void)
 	for (i = 0; dev_info->modules && dev_info->modules[i]; i++)
 		request_module(dev_info->modules[i]);
 
+	ret = software_node_register_node_group(int33fc_gpiochip_node_group);
+	if (ret)
+		return ret;
+
 	bat_swnode = dev_info->bat_swnode;
 	if (bat_swnode) {
 		ret = software_node_register(bat_swnode);
-		if (ret)
+		if (ret) {
+			x86_android_tablet_cleanup();
 			return ret;
+		}
 	}
 
 	gpiod_lookup_tables = dev_info->gpiod_lookup_tables;
-- 
2.40.1.606.ga4b1b128d6-goog