hwmon: (pmbus/mpq7932) Get page count based on chip info

Get page count using compatible match to support the series of chipsets
which differs in number of regualator/page.

Signed-off-by: Saravanan Sekar <saravanan@linumiz.com>
Link: https://lore.kernel.org/r/20231011164754.449399-2-saravanan@linumiz.com
Signed-off-by: Guenter Roeck <linux@roeck-us.net>

Author: ssekar15

drivers/hwmon/pmbus/mpq7932.c

@@ -105,7 +105,7 @@ static int mpq7932_probe(struct i2c_client *client)
 		return -ENOMEM;
 
 	info = &data->info;
-	info->pages = MPQ7932_NUM_PAGES;
+	info->pages = (int)(unsigned long)device_get_match_data(&client->dev);
 	info->format[PSC_VOLTAGE_OUT] = direct;
 	info->m[PSC_VOLTAGE_OUT] = 160;
 	info->b[PSC_VOLTAGE_OUT] = -33;
@@ -115,7 +115,7 @@ static int mpq7932_probe(struct i2c_client *client)
 	}
 
 #if IS_ENABLED(CONFIG_SENSORS_MPQ7932_REGULATOR)
-	info->num_regulators = ARRAY_SIZE(mpq7932_regulators_desc);
+	info->num_regulators = info->pages;
 	info->reg_desc = mpq7932_regulators_desc;
 #endif
 
@@ -129,7 +129,7 @@ static int mpq7932_probe(struct i2c_client *client)
 }
 
 static const struct of_device_id mpq7932_of_match[] = {
-	{ .compatible = "mps,mpq7932"},
+	{ .compatible = "mps,mpq7932", .data = (void *)MPQ7932_NUM_PAGES },
 	{},
 };
 MODULE_DEVICE_TABLE(of, mpq7932_of_match);