mfd: pm8008: Add mfd cell struct to register LDOs

Register mfd cell ID and name for each of the 7 pm8008
LDOs to probe them through mfd driver without needing
a separate compatible for regulator driver.

Also, add a different compatible for the mfd node that
contains regulators to make sure that the LDOs are
registered with the correct mfd device.

Signed-off-by: Satya Priya <quic_c_skakit@quicinc.com>

drivers/mfd/qcom-pm8008.c

@@ -8,6 +8,7 @@
 #include <linux/interrupt.h>
 #include <linux/irq.h>
 #include <linux/irqdomain.h>
+#include <linux/mfd/core.h>
 #include <linux/module.h>
 #include <linux/of_device.h>
 #include <linux/of_platform.h>
@@ -27,6 +28,10 @@
 #define INT_EN_CLR_OFFSET		0x16
 #define INT_LATCHED_STS_OFFSET		0x18
 
+static const struct mfd_cell pm8008_regulator_devs[] = {
+	MFD_CELL_NAME("qcom,pm8008-regulators"),
+};
+
 enum {
 	PM8008_MISC,
 	PM8008_TEMP_ALARM,
@@ -35,6 +40,11 @@ enum {
 	PM8008_NUM_PERIPHS,
 };
 
+enum pm8008_type {
+	PM8008_INFRA,
+	PM8008_REGULATORS,
+};
+
 #define PM8008_PERIPH_0_BASE	0x900
 #define PM8008_PERIPH_1_BASE	0x2400
 #define PM8008_PERIPH_2_BASE	0xC000
@@ -221,6 +231,7 @@ static int pm8008_probe(struct i2c_client *client)
 {
 	int rc;
 	struct pm8008_data *chip;
+	enum pm8008_type type;
 
 	chip = devm_kzalloc(&client->dev, sizeof(*chip), GFP_KERNEL);
 	if (!chip)
@@ -239,13 +250,24 @@ static int pm8008_probe(struct i2c_client *client)
 			dev_err(chip->dev, "Failed to probe irq periphs: %d\n", rc);
 	}
 
+	type = (uintptr_t) device_get_match_data(chip->dev);
+	if (type == PM8008_REGULATORS) {
+		rc = devm_mfd_add_devices(chip->dev, 0, pm8008_regulator_devs,
+				ARRAY_SIZE(pm8008_regulator_devs), NULL, 0, NULL);
+		if (rc) {
+			dev_err(chip->dev, "Failed to add children: %d\n", rc);
+			return rc;
+		}
+	}
+
 	return devm_of_platform_populate(chip->dev);
 }
 
 static const struct of_device_id pm8008_match[] = {
-	{ .compatible = "qcom,pm8008", },
-	{ },
+	{ .compatible = "qcom,pm8008", .data = (void *)PM8008_INFRA},
+	{ .compatible = "qcom,pm8008-regulators", .data = (void *)PM8008_REGULATORS},
 };
+MODULE_DEVICE_TABLE(of, pm8008_match)
 
 static struct i2c_driver pm8008_mfd_driver = {
 	.driver = {