staging: regulator: hi6421v600-regulator: cleanup struct hisi_regulator

There are several fields on this struct that can be removed,
as they already exists at struct regulator_desc.

Remove them, cleaning up the code in the process.

While here, rename it to hi6421v600_regulator_info, in order
to better match the driver's name.
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Link: https://lore.kernel.org/r/648d48f11368a9869d760c2bd54bfbc3feb4f44c.1597647359.git.mchehab+huawei@kernel.orgSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/hikey9xx/hi6421v600-regulator.c

@@ -39,21 +39,11 @@
 #include <linux/uaccess.h>
 #include <linux/spmi.h>
 
-struct hisi_regulator_register_info {
-	u32 ctrl_reg;
-	u32 enable_mask;
-	u32 eco_mode_mask;
-	u32 vset_reg;
-	u32 vset_mask;
-};
-
-struct hisi_regulator {
-	const char *name;
-	struct hisi_regulator_register_info register_info;
-	u32 off_on_delay;
-	u32 eco_uA;
+struct hi6421v600_regulator {
 	struct regulator_desc rdesc;
 	struct hisi_pmic *pmic;
+	u8 eco_mode_mask;
+	u32 eco_uA;
 };
 
 static DEFINE_MUTEX(enable_mutex);
@@ -62,29 +52,29 @@ static DEFINE_MUTEX(enable_mutex);
  * microseconds after 'since'.
  */
 
-static int hisi_regulator_is_enabled(struct regulator_dev *dev)
+static int hisi_regulator_is_enabled(struct regulator_dev *rdev)
 {
 	u32 reg_val;
-	struct hisi_regulator *sreg = rdev_get_drvdata(dev);
+	struct hi6421v600_regulator *sreg = rdev_get_drvdata(rdev);
 	struct hisi_pmic *pmic = sreg->pmic;
 
-	reg_val = hisi_pmic_read(pmic, sreg->register_info.ctrl_reg);
-	pr_debug("<[%s]: ctrl_reg=0x%x,enable_state=%d>\n",
-		 __func__, sreg->register_info.ctrl_reg,
-		(reg_val & sreg->register_info.enable_mask));
+	reg_val = hisi_pmic_read(pmic, rdev->desc->enable_reg);
+	pr_debug("<[%s]: enable_reg=0x%x,enable_state=%d>\n",
+		 __func__, rdev->desc->enable_reg,
+		(reg_val & rdev->desc->enable_mask));
 
-	return ((reg_val & sreg->register_info.enable_mask) != 0);
+	return ((reg_val & rdev->desc->enable_mask) != 0);
 }
 
-static int hisi_regulator_enable(struct regulator_dev *dev)
+static int hisi_regulator_enable(struct regulator_dev *rdev)
 {
-	struct hisi_regulator *sreg = rdev_get_drvdata(dev);
+	struct hi6421v600_regulator *sreg = rdev_get_drvdata(rdev);
 	struct hisi_pmic *pmic = sreg->pmic;
 
 	/* keep a distance of off_on_delay from last time disabled */
-	usleep_range(sreg->off_on_delay, sreg->off_on_delay + 1000);
+	usleep_range(rdev->desc->off_on_delay, rdev->desc->off_on_delay + 1000);
 
-	pr_debug("<[%s]: off_on_delay=%dus>\n", __func__, sreg->off_on_delay);
+	pr_debug("<[%s]: off_on_delay=%dus>\n", __func__, rdev->desc->off_on_delay);
 
 	/* cannot enable more than one regulator at one time */
 	mutex_lock(&enable_mutex);
@@ -92,103 +82,103 @@ static int hisi_regulator_enable(struct regulator_dev *dev)
 		     HISI_REGS_ENA_PROTECT_TIME + 1000);
 
 	/* set enable register */
-	hisi_pmic_rmw(pmic, sreg->register_info.ctrl_reg,
-		      sreg->register_info.enable_mask,
-				sreg->register_info.enable_mask);
-	pr_debug("<[%s]: ctrl_reg=0x%x,enable_mask=0x%x>\n",
-		 __func__, sreg->register_info.ctrl_reg,
-		 sreg->register_info.enable_mask);
+	hisi_pmic_rmw(pmic, rdev->desc->enable_reg,
+		      rdev->desc->enable_mask,
+				rdev->desc->enable_mask);
+	pr_debug("<[%s]: enable_reg=0x%x,enable_mask=0x%x>\n",
+		 __func__, rdev->desc->enable_reg,
+		 rdev->desc->enable_mask);
 
 	mutex_unlock(&enable_mutex);
 
 	return 0;
 }
 
-static int hisi_regulator_disable(struct regulator_dev *dev)
+static int hisi_regulator_disable(struct regulator_dev *rdev)
 {
-	struct hisi_regulator *sreg = rdev_get_drvdata(dev);
+	struct hi6421v600_regulator *sreg = rdev_get_drvdata(rdev);
 	struct hisi_pmic *pmic = sreg->pmic;
 
 	/* set enable register to 0 */
-	hisi_pmic_rmw(pmic, sreg->register_info.ctrl_reg,
-		      sreg->register_info.enable_mask, 0);
+	hisi_pmic_rmw(pmic, rdev->desc->enable_reg,
+		      rdev->desc->enable_mask, 0);
 
 	return 0;
 }
 
-static int hisi_regulator_get_voltage(struct regulator_dev *dev)
+static int hisi_regulator_get_voltage(struct regulator_dev *rdev)
 {
-	struct hisi_regulator *sreg = rdev_get_drvdata(dev);
+	struct hi6421v600_regulator *sreg = rdev_get_drvdata(rdev);
 	struct hisi_pmic *pmic = sreg->pmic;
 	u32 reg_val, selector;
 
 	/* get voltage selector */
-	reg_val = hisi_pmic_read(pmic, sreg->register_info.vset_reg);
-	pr_debug("<[%s]: vset_reg=0x%x>\n",
-		 __func__, sreg->register_info.vset_reg);
+	reg_val = hisi_pmic_read(pmic, rdev->desc->vsel_reg);
+	pr_debug("<[%s]: vsel_reg=0x%x>\n",
+		 __func__, rdev->desc->vsel_reg);
 
-	selector = (reg_val & sreg->register_info.vset_mask) >>
-				(ffs(sreg->register_info.vset_mask) - 1);
+	selector = (reg_val & rdev->desc->vsel_mask) >>
+				(ffs(rdev->desc->vsel_mask) - 1);
 
-	return sreg->rdesc.ops->list_voltage(dev, selector);
+	return rdev->desc->ops->list_voltage(rdev, selector);
 }
 
-static int hisi_regulator_set_voltage(struct regulator_dev *dev,
+static int hisi_regulator_set_voltage(struct regulator_dev *rdev,
 				      int min_uV, int max_uV, unsigned int *selector)
 {
-	struct hisi_regulator *sreg = rdev_get_drvdata(dev);
+	struct hi6421v600_regulator *sreg = rdev_get_drvdata(rdev);
 	struct hisi_pmic *pmic = sreg->pmic;
 	u32 vsel;
 	int ret = 0;
 
-	for (vsel = 0; vsel < sreg->rdesc.n_voltages; vsel++) {
-		int uV = sreg->rdesc.volt_table[vsel];
+	for (vsel = 0; vsel < rdev->desc->n_voltages; vsel++) {
+		int uV = rdev->desc->volt_table[vsel];
 		/* Break at the first in-range value */
 		if (min_uV <= uV && uV <= max_uV)
 			break;
 	}
 
 	/* unlikely to happen. sanity test done by regulator core */
-	if (unlikely(vsel == sreg->rdesc.n_voltages))
+	if (unlikely(vsel == rdev->desc->n_voltages))
 		return -EINVAL;
 
 	*selector = vsel;
 	/* set voltage selector */
-	hisi_pmic_rmw(pmic, sreg->register_info.vset_reg,
-		      sreg->register_info.vset_mask,
-		vsel << (ffs(sreg->register_info.vset_mask) - 1));
+	hisi_pmic_rmw(pmic, rdev->desc->vsel_reg,
+		      rdev->desc->vsel_mask,
+		vsel << (ffs(rdev->desc->vsel_mask) - 1));
 
-	pr_debug("<[%s]: vset_reg=0x%x, vset_mask=0x%x, value=0x%x>\n",
+	pr_debug("<[%s]: vsel_reg=0x%x, vsel_mask=0x%x, value=0x%x>\n",
 		 __func__,
-		 sreg->register_info.vset_reg,
-		 sreg->register_info.vset_mask,
-		 vsel << (ffs(sreg->register_info.vset_mask) - 1));
+		 rdev->desc->vsel_reg,
+		 rdev->desc->vsel_mask,
+		 vsel << (ffs(rdev->desc->vsel_mask) - 1));
 
 	return ret;
 }
 
-static unsigned int hisi_regulator_get_mode(struct regulator_dev *dev)
+static unsigned int hisi_regulator_get_mode(struct regulator_dev *rdev)
 {
-	struct hisi_regulator *sreg = rdev_get_drvdata(dev);
+	struct hi6421v600_regulator *sreg = rdev_get_drvdata(rdev);
 	struct hisi_pmic *pmic = sreg->pmic;
 	u32 reg_val;
 
-	reg_val = hisi_pmic_read(pmic, sreg->register_info.ctrl_reg);
-	pr_debug("<[%s]: reg_val=%d, ctrl_reg=0x%x, eco_mode_mask=0x%x>\n",
+	reg_val = hisi_pmic_read(pmic, rdev->desc->enable_reg);
+	pr_debug("<[%s]: reg_val=%d, enable_reg=0x%x, eco_mode_mask=0x%x>\n",
 		 __func__, reg_val,
-		sreg->register_info.ctrl_reg,
-		sreg->register_info.eco_mode_mask);
+		rdev->desc->enable_reg,
+		sreg->eco_mode_mask);
 
-	if (reg_val & sreg->register_info.eco_mode_mask)
+	if (reg_val & sreg->eco_mode_mask)
 		return REGULATOR_MODE_IDLE;
 	else
 		return REGULATOR_MODE_NORMAL;
 }
 
-static int hisi_regulator_set_mode(struct regulator_dev *dev,
+static int hisi_regulator_set_mode(struct regulator_dev *rdev,
 				   unsigned int mode)
 {
-	struct hisi_regulator *sreg = rdev_get_drvdata(dev);
+	struct hi6421v600_regulator *sreg = rdev_get_drvdata(rdev);
 	struct hisi_pmic *pmic = sreg->pmic;
 	u32 eco_mode;
 
@@ -204,23 +194,23 @@ static int hisi_regulator_set_mode(struct regulator_dev *dev,
 	}
 
 	/* set mode */
-	hisi_pmic_rmw(pmic, sreg->register_info.ctrl_reg,
-		      sreg->register_info.eco_mode_mask,
-		eco_mode << (ffs(sreg->register_info.eco_mode_mask) - 1));
+	hisi_pmic_rmw(pmic, rdev->desc->enable_reg,
+		      sreg->eco_mode_mask,
+		eco_mode << (ffs(sreg->eco_mode_mask) - 1));
 
-	pr_debug("<[%s]: ctrl_reg=0x%x, eco_mode_mask=0x%x, value=0x%x>\n",
+	pr_debug("<[%s]: enable_reg=0x%x, eco_mode_mask=0x%x, value=0x%x>\n",
 		 __func__,
-		sreg->register_info.ctrl_reg,
-		sreg->register_info.eco_mode_mask,
-		eco_mode << (ffs(sreg->register_info.eco_mode_mask) - 1));
+		rdev->desc->enable_reg,
+		sreg->eco_mode_mask,
+		eco_mode << (ffs(sreg->eco_mode_mask) - 1));
 	return 0;
 }
 
-static unsigned int hisi_regulator_get_optimum_mode(struct regulator_dev *dev,
+static unsigned int hisi_regulator_get_optimum_mode(struct regulator_dev *rdev,
 						    int input_uV, int output_uV,
 						    int load_uA)
 {
-	struct hisi_regulator *sreg = rdev_get_drvdata(dev);
+	struct hi6421v600_regulator *sreg = rdev_get_drvdata(rdev);
 
 	if (load_uA || ((unsigned int)load_uA > sreg->eco_uA))
 		return REGULATOR_MODE_NORMAL;
@@ -228,42 +218,43 @@ static unsigned int hisi_regulator_get_optimum_mode(struct regulator_dev *dev,
 		return REGULATOR_MODE_IDLE;
 }
 
-static int hisi_dt_parse_common(struct hisi_regulator *sreg,
-				struct platform_device *pdev)
+static int hisi_dt_parse(struct platform_device *pdev,
+			 struct hi6421v600_regulator *sreg,
+			 struct regulator_desc *rdesc)
 {
 	struct device *dev = &pdev->dev;
 	struct device_node *np = dev->of_node;
-	struct regulator_desc *rdesc = &sreg->rdesc;
 	unsigned int register_info[3] = {0};
-	int ret = 0;
+	unsigned int *v_table;
+	int ret;
 
-	/* parse .register_info.ctrl_reg */
+	/* parse .register_info.enable_reg */
 	ret = of_property_read_u32_array(np, "hisilicon,hisi-ctrl",
 					 register_info, 3);
 	if (ret) {
 		dev_err(dev, "no hisilicon,hisi-ctrl property set\n");
-		goto dt_parse_common_end;
+		return ret;
 	}
-	sreg->register_info.ctrl_reg = register_info[0];
-	sreg->register_info.enable_mask = register_info[1];
-	sreg->register_info.eco_mode_mask = register_info[2];
+	rdesc->enable_reg = register_info[0];
+	rdesc->enable_mask = register_info[1];
+	sreg->eco_mode_mask = register_info[2];
 
-	/* parse .register_info.vset_reg */
+	/* parse .register_info.vsel_reg */
 	ret = of_property_read_u32_array(np, "hisilicon,hisi-vset",
 					 register_info, 2);
 	if (ret) {
 		dev_err(dev, "no hisilicon,hisi-vset property set\n");
-		goto dt_parse_common_end;
+		return ret;
 	}
-	sreg->register_info.vset_reg = register_info[0];
-	sreg->register_info.vset_mask = register_info[1];
+	rdesc->vsel_reg = register_info[0];
+	rdesc->vsel_mask = register_info[1];
 
 	/* parse .off-on-delay */
 	ret = of_property_read_u32(np, "hisilicon,hisi-off-on-delay-us",
-				   &sreg->off_on_delay);
+				   &rdesc->off_on_delay);
 	if (ret) {
 		dev_err(dev, "no hisilicon,hisi-off-on-delay-us property set\n");
-		goto dt_parse_common_end;
+		return ret;
 	}
 
 	/* parse .enable_time */
@@ -271,7 +262,7 @@ static int hisi_dt_parse_common(struct hisi_regulator *sreg,
 				   &rdesc->enable_time);
 	if (ret) {
 		dev_err(dev, "no hisilicon,hisi-enable-time-us property set\n");
-		goto dt_parse_common_end;
+		return ret;
 	}
 
 	/* parse .eco_uA */
@@ -282,56 +273,24 @@ static int hisi_dt_parse_common(struct hisi_regulator *sreg,
 		ret = 0;
 	}
 
-dt_parse_common_end:
-	return ret;
-}
+	/* parse volt_table */
 
-static int hisi_dt_parse_ldo(struct hisi_regulator *sreg,
-			     struct platform_device *pdev)
-{
-	struct device *dev = &pdev->dev;
-	struct device_node *np = dev->of_node;
-	struct regulator_desc *rdesc = &sreg->rdesc;
-	unsigned int *v_table;
-	int ret = 0;
-
-	/* parse .n_voltages, and .volt_table */
-	ret = of_property_read_u32(np, "hisilicon,hisi-n-voltages",
-				   &rdesc->n_voltages);
-	if (ret) {
-		dev_err(dev, "no hisilicon,hisi-n-voltages property set\n");
-		goto dt_parse_ldo_end;
-	}
+	rdesc->n_voltages = of_property_count_u32_elems(np, "hisilicon,hisi-vset-table");
 
-	/* alloc space for .volt_table */
 	v_table = devm_kzalloc(dev, sizeof(unsigned int) * rdesc->n_voltages,
 			       GFP_KERNEL);
-	if (unlikely(!v_table)) {
-		ret = -ENOMEM;
-		dev_err(dev, "no memory for .volt_table\n");
-		goto dt_parse_ldo_end;
-	}
+	if (unlikely(!v_table))
+		return  -ENOMEM;
+	rdesc->volt_table = v_table;
 
 	ret = of_property_read_u32_array(np, "hisilicon,hisi-vset-table",
 					 v_table, rdesc->n_voltages);
 	if (ret) {
 		dev_err(dev, "no hisilicon,hisi-vset-table property set\n");
-		goto dt_parse_ldo_end1;
-	}
-	rdesc->volt_table = v_table;
-
-	/* parse hisi regulator's dt common part */
-	ret = hisi_dt_parse_common(sreg, pdev);
-	if (ret) {
-		dev_err(dev, "failure in hisi_dt_parse_common\n");
-		goto dt_parse_ldo_end1;
-	}
-
 		return ret;
+	}
 
-dt_parse_ldo_end1:
-dt_parse_ldo_end:
-	return ret;
+	return 0;
 }
 
 static struct regulator_ops hisi_ldo_rops = {
@@ -364,7 +323,7 @@ static int hisi_regulator_probe_ldo(struct platform_device *pdev,
 	struct device *dev = &pdev->dev;
 	struct regulator_desc *rdesc;
 	struct regulator_dev *rdev;
-	struct hisi_regulator *sreg = NULL;
+	struct hi6421v600_regulator *sreg = NULL;
 	struct regulator_init_data *initdata;
 	struct regulator_config config = { };
 	struct regulation_constraints *constraint;
@@ -401,11 +360,10 @@ static int hisi_regulator_probe_ldo(struct platform_device *pdev,
 	if (!sreg)
 		return -ENOMEM;
 
-	sreg->name = initdata->constraints.name;
 	sreg->pmic = pmic;
 	rdesc = &sreg->rdesc;
 
-	rdesc->name = sreg->name;
+	rdesc->name = initdata->constraints.name;
 	rdesc->ops = &hisi_ldo_rops;
 	rdesc->type = REGULATOR_VOLTAGE;
 	rdesc->min_uV = initdata->constraints.min_uV;
@@ -415,7 +373,7 @@ static int hisi_regulator_probe_ldo(struct platform_device *pdev,
 		initdata->supply_regulator = supplyname;
 
 	/* parse device tree data for regulator specific */
-	ret = hisi_dt_parse_ldo(sreg, pdev);
+	ret = hisi_dt_parse(pdev, sreg, rdesc);
 	if (ret) {
 		dev_err(dev, "device tree parameter parse error!\n");
 		goto hisi_probe_end;
@@ -501,13 +459,13 @@ static int hisi_regulator_probe(struct platform_device *pdev)
 static int hisi_regulator_remove(struct platform_device *pdev)
 {
 	struct regulator_dev *rdev = dev_get_drvdata(&pdev->dev);
-	struct hisi_regulator *sreg = rdev_get_drvdata(rdev);
+	struct hi6421v600_regulator *sreg = rdev_get_drvdata(rdev);
 
 	regulator_unregister(rdev);
 
 	/* TODO: should i worry about that? devm_kzalloc */
-	if (sreg->rdesc.volt_table)
-		devm_kfree(&pdev->dev, (unsigned int *)sreg->rdesc.volt_table);
+	if (rdev->desc->volt_table)
+		devm_kfree(&pdev->dev, (unsigned int *)rdev->desc->volt_table);
 
 	kfree(sreg);