platform/x86: int3472: Support multiple gpio lookups in board data

Currently, we only support passing a single gpiod_lookup_table as part
of the board data for the tps68470 driver. This carries the implicit
assumption that each TPS68470 device will only support a single
sensor, which does not hold true.

Extend the code to support the possibility of multiple sensors each
having a gpiod_lookup_table, and opportunistically add the lookup
table for the Surface Go line's IR camera.

Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Daniel Scally <djrscally@gmail.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

drivers/platform/x86/intel/int3472/tps68470.c

@@ -150,6 +150,7 @@ static int skl_int3472_tps68470_probe(struct i2c_client *client)
 	int n_consumers;
 	int device_type;
 	int ret;
+	int i;
 
 	n_consumers = skl_int3472_fill_clk_pdata(&client->dev, &clk_pdata);
 	if (n_consumers < 0)
@@ -194,15 +195,18 @@ static int skl_int3472_tps68470_probe(struct i2c_client *client)
 		cells[1].pdata_size = sizeof(struct tps68470_regulator_platform_data);
 		cells[2].name = "tps68470-gpio";
 
-		gpiod_add_lookup_table(board_data->tps68470_gpio_lookup_table);
+		for (i = 0; i < board_data->n_gpiod_lookups; i++)
+			gpiod_add_lookup_table(board_data->tps68470_gpio_lookup_tables[i]);
 
 		ret = devm_mfd_add_devices(&client->dev, PLATFORM_DEVID_NONE,
 					   cells, TPS68470_WIN_MFD_CELL_COUNT,
 					   NULL, 0, NULL);
 		kfree(cells);
 
-		if (ret)
-			gpiod_remove_lookup_table(board_data->tps68470_gpio_lookup_table);
+		if (ret) {
+			for (i = 0; i < board_data->n_gpiod_lookups; i++)
+				gpiod_remove_lookup_table(board_data->tps68470_gpio_lookup_tables[i]);
+		}
 
 		break;
 	case DESIGNED_FOR_CHROMEOS:
@@ -226,10 +230,13 @@ static int skl_int3472_tps68470_probe(struct i2c_client *client)
 static int skl_int3472_tps68470_remove(struct i2c_client *client)
 {
 	const struct int3472_tps68470_board_data *board_data;
+	int i;
 
 	board_data = int3472_tps68470_get_board_data(dev_name(&client->dev));
-	if (board_data)
-		gpiod_remove_lookup_table(board_data->tps68470_gpio_lookup_table);
+	if (board_data) {
+		for (i = 0; i < board_data->n_gpiod_lookups; i++)
+			gpiod_remove_lookup_table(board_data->tps68470_gpio_lookup_tables[i]);
+	}
 
 	return 0;
 }

drivers/platform/x86/intel/int3472/tps68470.h

@@ -16,8 +16,9 @@ struct tps68470_regulator_platform_data;
 
 struct int3472_tps68470_board_data {
 	const char *dev_name;
-	struct gpiod_lookup_table *tps68470_gpio_lookup_table;
 	const struct tps68470_regulator_platform_data *tps68470_regulator_pdata;
+	unsigned int n_gpiod_lookups;
+	struct gpiod_lookup_table *tps68470_gpio_lookup_tables[];
 };
 
 const struct int3472_tps68470_board_data *int3472_tps68470_get_board_data(const char *dev_name);

drivers/platform/x86/intel/int3472/tps68470_board_data.c

@@ -96,7 +96,7 @@ static const struct tps68470_regulator_platform_data surface_go_tps68470_pdata =
 	},
 };
 
-static struct gpiod_lookup_table surface_go_tps68470_gpios = {
+static struct gpiod_lookup_table surface_go_int347a_gpios = {
 	.dev_id = "i2c-INT347A:00",
 	.table = {
 		GPIO_LOOKUP("tps68470-gpio", 9, "reset", GPIO_ACTIVE_LOW),
@@ -105,16 +105,31 @@ static struct gpiod_lookup_table surface_go_tps68470_gpios = {
 	}
 };
 
+static struct gpiod_lookup_table surface_go_int347e_gpios = {
+	.dev_id = "i2c-INT347E:00",
+	.table = {
+		GPIO_LOOKUP("tps68470-gpio", 5, "enable", GPIO_ACTIVE_HIGH),
+		{ }
+	}
+};
+
 static const struct int3472_tps68470_board_data surface_go_tps68470_board_data = {
 	.dev_name = "i2c-INT3472:05",
-	.tps68470_gpio_lookup_table = &surface_go_tps68470_gpios,
 	.tps68470_regulator_pdata = &surface_go_tps68470_pdata,
+	.n_gpiod_lookups = 2,
+	.tps68470_gpio_lookup_tables = {
+		&surface_go_int347a_gpios,
+		&surface_go_int347e_gpios,
+	},
 };
 
 static const struct int3472_tps68470_board_data surface_go3_tps68470_board_data = {
 	.dev_name = "i2c-INT3472:01",
-	.tps68470_gpio_lookup_table = &surface_go_tps68470_gpios,
 	.tps68470_regulator_pdata = &surface_go_tps68470_pdata,
+	.n_gpiod_lookups = 1,
+	.tps68470_gpio_lookup_tables = {
+		&surface_go_int347a_gpios
+	},
 };
 
 static const struct dmi_system_id int3472_tps68470_board_data_table[] = {