regulator: bq257xx: Remove reference to the parent MFD's dev

Drop the ->bq field from the platform data of the bq257xx regulator driver,
which was only used to get the regmap of the parent MFD device, and use the
regmap from the regulator_dev instead, slimming down the code a bit.

Acked-by: Mark Brown <broonie@kernel.org>
Tested-by: Chris Morgan <macromorgan@hotmail.com>
Signed-off-by: Alexey Charkov <alchark@flipper.net>
Link: https://patch.msgid.link/20260331-bq25792-v6-2-0278fba33eb9@flipper.net
Signed-off-by: Mark Brown <broonie@kernel.org>

Author: alchark

drivers/regulator/bq257xx-regulator.c

@@ -15,19 +15,18 @@
 #include <linux/regulator/of_regulator.h>
 
 struct bq257xx_reg_data {
-	struct bq257xx_device *bq;
 	struct regulator_dev *bq257xx_reg;
 	struct gpio_desc *otg_en_gpio;
 	struct regulator_desc desc;
 };
 
 static int bq25703_vbus_get_cur_limit(struct regulator_dev *rdev)
 {
-	struct bq257xx_reg_data *pdata = rdev_get_drvdata(rdev);
+	struct regmap *regmap = rdev_get_regmap(rdev);
 	int ret;
 	unsigned int reg;
 
-	ret = regmap_read(pdata->bq->regmap, BQ25703_OTG_CURRENT, &reg);
+	ret = regmap_read(regmap, BQ25703_OTG_CURRENT, &reg);
 	if (ret)
 		return ret;
 	return FIELD_GET(BQ25703_OTG_CUR_MASK, reg) * BQ25703_OTG_CUR_STEP_UA;
@@ -40,7 +39,7 @@ static int bq25703_vbus_get_cur_limit(struct regulator_dev *rdev)
 static int bq25703_vbus_set_cur_limit(struct regulator_dev *rdev,
 				      int min_uA, int max_uA)
 {
-	struct bq257xx_reg_data *pdata = rdev_get_drvdata(rdev);
+	struct regmap *regmap = rdev_get_regmap(rdev);
 	unsigned int reg;
 
 	if ((min_uA > BQ25703_OTG_CUR_MAX_UA) || (max_uA < 0))
@@ -52,7 +51,7 @@ static int bq25703_vbus_set_cur_limit(struct regulator_dev *rdev,
 	if ((reg * BQ25703_OTG_CUR_STEP_UA) < min_uA)
 		return -EINVAL;
 
-	return regmap_write(pdata->bq->regmap, BQ25703_OTG_CURRENT,
+	return regmap_write(regmap, BQ25703_OTG_CURRENT,
 			    FIELD_PREP(BQ25703_OTG_CUR_MASK, reg));
 }
 
@@ -137,7 +136,6 @@ static void bq257xx_reg_dt_parse_gpio(struct platform_device *pdev)
 static int bq257xx_regulator_probe(struct platform_device *pdev)
 {
 	struct device *dev = &pdev->dev;
-	struct bq257xx_device *bq = dev_get_drvdata(pdev->dev.parent);
 	struct bq257xx_reg_data *pdata;
 	struct device_node *np = dev->of_node;
 	struct regulator_config cfg = {};
@@ -148,7 +146,6 @@ static int bq257xx_regulator_probe(struct platform_device *pdev)
 	if (!pdata)
 		return -ENOMEM;
 
-	pdata->bq = bq;
 	pdata->desc = bq25703_vbus_desc;
 
 	platform_set_drvdata(pdev, pdata);