mfd: tps6594-i2c: Add TI TPS65224 PMIC I2C

Add support for TPS65224 PMIC in TPS6594's I2C driver which has
significant functional overlap.
Signed-off-by: Bhargav Raviprakash <bhargav.r@ltts.com>
Acked-by: Julien Panis <jpanis@baylibre.com>
Link: https://lore.kernel.org/r/0109018f2fdaecea-12513236-1059-4227-9078-7b3e0d447cc0-000000@ap-south-1.amazonses.comSigned-off-by: Lee Jones <lee@kernel.org>

drivers/mfd/tps6594-i2c.c

 // SPDX-License-Identifier: GPL-2.0
 /*
- * I2C access driver for TI TPS6594/TPS6593/LP8764 PMICs
+ * I2C access driver for TI TPS65224/TPS6594/TPS6593/LP8764 PMICs
  *
  * Copyright (C) 2023 BayLibre Incorporated - https://www.baylibre.com/
  */
@@ -183,7 +183,7 @@ static int tps6594_i2c_write(void *context, const void *data, size_t count)
 	return ret;
 }
 
-static const struct regmap_config tps6594_i2c_regmap_config = {
+static struct regmap_config tps6594_i2c_regmap_config = {
 	.reg_bits = 16,
 	.val_bits = 8,
 	.max_register = TPS6594_REG_DWD_FAIL_CNT_REG,
@@ -196,6 +196,7 @@ static const struct of_device_id tps6594_i2c_of_match_table[] = {
 	{ .compatible = "ti,tps6594-q1", .data = (void *)TPS6594, },
 	{ .compatible = "ti,tps6593-q1", .data = (void *)TPS6593, },
 	{ .compatible = "ti,lp8764-q1",  .data = (void *)LP8764,  },
+	{ .compatible = "ti,tps65224-q1", .data = (void *)TPS65224, },
 	{}
 };
 MODULE_DEVICE_TABLE(of, tps6594_i2c_of_match_table);
@@ -216,15 +217,18 @@ static int tps6594_i2c_probe(struct i2c_client *client)
 	tps->reg = client->addr;
 	tps->irq = client->irq;
 
-	tps->regmap = devm_regmap_init(dev, NULL, client, &tps6594_i2c_regmap_config);
-	if (IS_ERR(tps->regmap))
-		return dev_err_probe(dev, PTR_ERR(tps->regmap), "Failed to init regmap\n");
-
 	match = of_match_device(tps6594_i2c_of_match_table, dev);
 	if (!match)
 		return dev_err_probe(dev, -EINVAL, "Failed to find matching chip ID\n");
 	tps->chip_id = (unsigned long)match->data;
 
+	if (tps->chip_id == TPS65224)
+		tps6594_i2c_regmap_config.volatile_table = &tps65224_volatile_table;
+
+	tps->regmap = devm_regmap_init(dev, NULL, client, &tps6594_i2c_regmap_config);
+	if (IS_ERR(tps->regmap))
+		return dev_err_probe(dev, PTR_ERR(tps->regmap), "Failed to init regmap\n");
+
 	crc8_populate_msb(tps6594_i2c_crc_table, TPS6594_CRC8_POLYNOMIAL);
 
 	return tps6594_device_init(tps, enable_crc);
@@ -240,5 +244,5 @@ static struct i2c_driver tps6594_i2c_driver = {
 module_i2c_driver(tps6594_i2c_driver);
 
 MODULE_AUTHOR("Julien Panis <jpanis@baylibre.com>");
-MODULE_DESCRIPTION("TPS6594 I2C Interface Driver");
+MODULE_DESCRIPTION("I2C Interface Driver for TPS65224, TPS6594/3, and LP8764");
 MODULE_LICENSE("GPL");