staging: regulator: hi6421v600-regulator: add a driver-specific debug macro

Using dev_dbg() is not too nice, as, instead of printing the
name of the regulator, it prints "regulator.<number>", making
harder to associate what is happening with each ldo line.

So, add a debug-specific macro, which will print the rdev's
name, just like the regulator core.
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Link: https://lore.kernel.org/r/1690b8531b23910aa915bd2725410b926022c481.1597647359.git.mchehab+huawei@kernel.orgSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/hikey9xx/hi6421v600-regulator.c

@@ -39,6 +39,9 @@
 #include <linux/uaccess.h>
 #include <linux/spmi.h>
 
+#define rdev_dbg(rdev, fmt, arg...)	\
+		 pr_debug("%s: %s: " fmt, rdev->desc->name, __func__, ##arg)
+
 struct hi6421v600_regulator {
 	struct regulator_desc rdesc;
 	struct hi6421_spmi_pmic *pmic;
@@ -60,10 +63,10 @@ static int hi6421_spmi_regulator_is_enabled(struct regulator_dev *rdev)
 
 	reg_val = hi6421_spmi_pmic_read(pmic, rdev->desc->enable_reg);
 
-	dev_dbg(&rdev->dev,
-		"%s: enable_reg=0x%x, val= 0x%x, enable_state=%d\n",
-		 __func__, rdev->desc->enable_reg,
-		reg_val, (reg_val & rdev->desc->enable_mask));
+	rdev_dbg(rdev,
+		 "enable_reg=0x%x, val= 0x%x, enable_state=%d\n",
+		 rdev->desc->enable_reg,
+		 reg_val, (reg_val & rdev->desc->enable_mask));
 
 	return ((reg_val & rdev->desc->enable_mask) != 0);
 }
@@ -73,21 +76,20 @@ static int hi6421_spmi_regulator_enable(struct regulator_dev *rdev)
 	struct hi6421v600_regulator *sreg = rdev_get_drvdata(rdev);
 	struct hi6421_spmi_pmic *pmic = sreg->pmic;
 
-	dev_dbg(&rdev->dev, "%s: off_on_delay=%d us\n",
-		__func__, rdev->desc->off_on_delay);
-
 	/* cannot enable more than one regulator at one time */
 	mutex_lock(&enable_mutex);
 	usleep_range(HISI_REGS_ENA_PROTECT_TIME,
 		     HISI_REGS_ENA_PROTECT_TIME + 1000);
 
 	/* set enable register */
+	rdev_dbg(rdev,
+		 "off_on_delay=%d us, enable_reg=0x%x, enable_mask=0x%x\n",
+		 rdev->desc->off_on_delay, rdev->desc->enable_reg,
+		 rdev->desc->enable_mask);
+
 	hi6421_spmi_pmic_rmw(pmic, rdev->desc->enable_reg,
 			     rdev->desc->enable_mask,
 			     rdev->desc->enable_mask);
-	dev_dbg(&rdev->dev, "%s: enable_reg=0x%x, enable_mask=0x%x\n",
-		 __func__, rdev->desc->enable_reg,
-		 rdev->desc->enable_mask);
 
 	mutex_unlock(&enable_mutex);
 
@@ -100,6 +102,9 @@ static int hi6421_spmi_regulator_disable(struct regulator_dev *rdev)
 	struct hi6421_spmi_pmic *pmic = sreg->pmic;
 
 	/* set enable register to 0 */
+	rdev_dbg(rdev, "enable_reg=0x%x, enable_mask=0x%x\n",
+		 rdev->desc->enable_reg, rdev->desc->enable_mask);
+
 	hi6421_spmi_pmic_rmw(pmic, rdev->desc->enable_reg,
 		      rdev->desc->enable_mask, 0);
 
@@ -117,9 +122,9 @@ static int hi6421_spmi_regulator_get_voltage_sel(struct regulator_dev *rdev)
 
 	selector = (reg_val & rdev->desc->vsel_mask) >>	(ffs(rdev->desc->vsel_mask) - 1);
 
-	dev_dbg(&rdev->dev,
-		"%s: vsel_reg=0x%x, value=0x%x, entry=0x%x, voltage=%d mV\n",
-		 __func__, rdev->desc->vsel_reg, reg_val, selector,
+	rdev_dbg(rdev,
+		"vsel_reg=0x%x, value=0x%x, entry=0x%x, voltage=%d mV\n",
+		 rdev->desc->vsel_reg, reg_val, selector,
 		rdev->desc->ops->list_voltage(rdev, selector) / 1000);
 
 	return selector;
@@ -139,15 +144,14 @@ static int hi6421_spmi_regulator_set_voltage_sel(struct regulator_dev *rdev,
 	reg_val = selector << (ffs(rdev->desc->vsel_mask) - 1);
 
 	/* set voltage selector */
-	hi6421_spmi_pmic_rmw(pmic, rdev->desc->vsel_reg,
-			     rdev->desc->vsel_mask, reg_val);
-
-	dev_dbg(&rdev->dev,
-		"%s: vsel_reg=0x%x, mask=0x%x, value=0x%x, voltage=%d mV\n",
-		 __func__,
+	rdev_dbg(rdev,
+		"vsel_reg=0x%x, mask=0x%x, value=0x%x, voltage=%d mV\n",
 		 rdev->desc->vsel_reg, rdev->desc->vsel_mask, reg_val,
 		 rdev->desc->ops->list_voltage(rdev, selector) / 1000);
 
+	hi6421_spmi_pmic_rmw(pmic, rdev->desc->vsel_reg,
+			     rdev->desc->vsel_mask, reg_val);
+
 	return 0;
 }
 
@@ -165,9 +169,9 @@ static unsigned int hi6421_spmi_regulator_get_mode(struct regulator_dev *rdev)
 	else
 		mode = REGULATOR_MODE_NORMAL;
 
-	dev_dbg(&rdev->dev,
-		"%s: enable_reg=0x%x, eco_mode_mask=0x%x, reg_val=0x%x, %s mode\n",
-		 __func__, rdev->desc->enable_reg, sreg->eco_mode_mask, reg_val,
+	rdev_dbg(rdev,
+		"enable_reg=0x%x, eco_mode_mask=0x%x, reg_val=0x%x, %s mode\n",
+		 rdev->desc->enable_reg, sreg->eco_mode_mask, reg_val,
 		 mode == REGULATOR_MODE_IDLE ? "idle" : "normal");
 
 	return mode;
@@ -192,13 +196,12 @@ static int hi6421_spmi_regulator_set_mode(struct regulator_dev *rdev,
 	}
 
 	/* set mode */
+	rdev_dbg(rdev, "enable_reg=0x%x, eco_mode_mask=0x%x, value=0x%x\n",
+		 rdev->desc->enable_reg, sreg->eco_mode_mask, val);
+
 	hi6421_spmi_pmic_rmw(pmic, rdev->desc->enable_reg,
 			     sreg->eco_mode_mask, val);
 
-	dev_dbg(&rdev->dev,
-		"%s: enable_reg=0x%x, eco_mode_mask=0x%x, value=0x%x\n",
-		 __func__, rdev->desc->enable_reg, sreg->eco_mode_mask, val);
-
 	return 0;
 }
 
@@ -209,10 +212,10 @@ static unsigned int hi6421_spmi_regulator_get_optimum_mode(struct regulator_dev
 	struct hi6421v600_regulator *sreg = rdev_get_drvdata(rdev);
 
 	if (load_uA || ((unsigned int)load_uA > sreg->eco_uA)) {
-		dev_dbg(&rdev->dev, "%s: normal mode", __func__);
+		rdev_dbg(rdev, "normal mode");
 		return REGULATOR_MODE_NORMAL;
 	} else {
-		dev_dbg(&rdev->dev, "%s: idle mode", __func__);
+		rdev_dbg(rdev, "idle mode");
 		return REGULATOR_MODE_IDLE;
 	}
 }
@@ -373,7 +376,7 @@ static int hi6421_spmi_regulator_probe_ldo(struct platform_device *pdev,
 		goto probe_end;
 	}
 
-	dev_dbg(dev, "valid_modes_mask: 0x%x, valid_ops_mask: 0x%x\n",
+	rdev_dbg(rdev, "valid_modes_mask: 0x%x, valid_ops_mask: 0x%x\n",
 		 constraint->valid_modes_mask, constraint->valid_ops_mask);
 
 	dev_set_drvdata(dev, rdev);