regulators: Added verbose debug messages to ab8500 regulators

The verbose debug outputs register writes and reads that can be
used to debug the driver.

Signed-off-by: Bengt Jonsson <bengt.g.jonsson@stericsson.com>
Acked-by: Linus Walleij <linus.walleij@stericsson.com>
Acked-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Liam Girdwood <lrg@slimlogic.co.uk>

diff --git a/drivers/regulator/ab8500.c b/drivers/regulator/ab8500.c
index 2a15b63..7d372b8 100644 (file)
--- a/drivers/regulator/ab8500.c
+++ b/drivers/regulator/ab8500.c
@@ -114,6 +114,12 @@ static int ab8500_regulator_enable(struct regulator_dev *rdev)
        if (ret < 0)
                dev_err(rdev_get_dev(rdev),
                        "couldn't set enable bits for regulator\n");
+
+       dev_vdbg(rdev_get_dev(rdev),
+               "%s-enable (bank, reg, mask, value): 0x%x, 0x%x, 0x%x, 0x%x\n",
+               info->desc.name, info->update_bank, info->update_reg,
+               info->update_mask, info->update_val_enable);
+
        return ret;
 }
 
@@ -133,6 +139,12 @@ static int ab8500_regulator_disable(struct regulator_dev *rdev)
        if (ret < 0)
                dev_err(rdev_get_dev(rdev),
                        "couldn't set disable bits for regulator\n");
+
+       dev_vdbg(rdev_get_dev(rdev),
+               "%s-disable (bank, reg, mask, value): 0x%x, 0x%x, 0x%x, 0x%x\n",
+               info->desc.name, info->update_bank, info->update_reg,
+               info->update_mask, 0x0);
+
        return ret;
 }
 
@@ -140,7 +152,7 @@ static int ab8500_regulator_is_enabled(struct regulator_dev *rdev)
 {
        int ret;
        struct ab8500_regulator_info *info = rdev_get_drvdata(rdev);
-       u8 value;
+       u8 regval;
 
        if (info == NULL) {
                dev_err(rdev_get_dev(rdev), "regulator info null pointer\n");
@@ -148,14 +160,20 @@ static int ab8500_regulator_is_enabled(struct regulator_dev *rdev)
        }
 
        ret = abx500_get_register_interruptible(info->dev,
-               info->update_bank, info->update_reg, &value);
+               info->update_bank, info->update_reg, &regval);
        if (ret < 0) {
                dev_err(rdev_get_dev(rdev),
                        "couldn't read 0x%x register\n", info->update_reg);
                return ret;
        }
 
-       if (value & info->update_mask)
+       dev_vdbg(rdev_get_dev(rdev),
+               "%s-is_enabled (bank, reg, mask, value): 0x%x, 0x%x, 0x%x,"
+               " 0x%x\n",
+               info->desc.name, info->update_bank, info->update_reg,
+               info->update_mask, regval);
+
+       if (regval & info->update_mask)
                return true;
        else
                return false;
@@ -182,29 +200,35 @@ static int ab8500_list_voltage(struct regulator_dev *rdev, unsigned selector)
 
 static int ab8500_regulator_get_voltage(struct regulator_dev *rdev)
 {
-       int ret;
+       int ret, val;
        struct ab8500_regulator_info *info = rdev_get_drvdata(rdev);
-       u8 value;
+       u8 regval;
 
        if (info == NULL) {
                dev_err(rdev_get_dev(rdev), "regulator info null pointer\n");
                return -EINVAL;
        }
 
-       ret = abx500_get_register_interruptible(info->dev, info->voltage_bank,
-               info->voltage_reg, &value);
+       ret = abx500_get_register_interruptible(info->dev,
+                       info->voltage_bank, info->voltage_reg, &regval);
        if (ret < 0) {
                dev_err(rdev_get_dev(rdev),
                        "couldn't read voltage reg for regulator\n");
                return ret;
        }
 
+       dev_vdbg(rdev_get_dev(rdev),
+               "%s-get_voltage (bank, reg, mask, value): 0x%x, 0x%x, 0x%x,"
+               " 0x%x\n",
+               info->desc.name, info->voltage_bank, info->voltage_reg,
+               info->voltage_mask, regval);
+
        /* vintcore has a different layout */
-       value &= info->voltage_mask;
+       val = regval & info->voltage_mask;
        if (info->desc.id == AB8500_LDO_INTCORE)
-               ret = info->voltages[value >> 0x3];
+               ret = info->voltages[val >> 0x3];
        else
-               ret = info->voltages[value];
+               ret = info->voltages[val];
 
        return ret;
 }
@@ -231,6 +255,7 @@ static int ab8500_regulator_set_voltage(struct regulator_dev *rdev,
 {
        int ret;
        struct ab8500_regulator_info *info = rdev_get_drvdata(rdev);
+       u8 regval;
 
        if (info == NULL) {
                dev_err(rdev_get_dev(rdev), "regulator info null pointer\n");
@@ -248,13 +273,20 @@ static int ab8500_regulator_set_voltage(struct regulator_dev *rdev,
        *selector = ret;
 
        /* set the registers for the request */
+       regval = (u8)ret;
        ret = abx500_mask_and_set_register_interruptible(info->dev,
-               info->voltage_bank, info->voltage_reg,
-               info->voltage_mask, (u8)ret);
+                       info->voltage_bank, info->voltage_reg,
+                       info->voltage_mask, regval);
        if (ret < 0)
                dev_err(rdev_get_dev(rdev),
                "couldn't set voltage reg for regulator\n");
 
+       dev_vdbg(rdev_get_dev(rdev),
+               "%s-set_voltage (bank, reg, mask, value): 0x%x, 0x%x, 0x%x,"
+               " 0x%x\n",
+               info->desc.name, info->voltage_bank, info->voltage_reg,
+               info->voltage_mask, regval);
+
        return ret;
 }
 
@@ -418,6 +450,9 @@ static __devinit int ab8500_regulator_probe(struct platform_device *pdev)
                        }
                        return err;
                }
+
+               dev_vdbg(rdev_get_dev(info->regulator),
+                       "%s-probed\n", info->desc.name);
        }
 
        return 0;
@@ -430,6 +465,10 @@ static __devexit int ab8500_regulator_remove(struct platform_device *pdev)
        for (i = 0; i < ARRAY_SIZE(ab8500_regulator_info); i++) {
                struct ab8500_regulator_info *info = NULL;
                info = &ab8500_regulator_info[i];
+
+               dev_vdbg(rdev_get_dev(info->regulator),
+                       "%s-remove\n", info->desc.name);
+
                regulator_unregister(info->regulator);
        }