[RFT v3 06/14] regulator: max77802: Remove support for board files

From: Krzysztof Kozlowski
Date: Thu Oct 30 2014 - 07:25:08 EST

The driver is used only on Exynos based boards with DTS support.
Convert the driver to DTS-only version. Parse all regulators at once,
not one-by-one. Remove dependency on data provided by max77686 MFD
driver.

Use new DT style parsing method for regulators init data. The regulator
driver now should have its own of_compatible property. If it is not
present then it will use "regulators" sub-node of parent's node.

Signed-off-by: Krzysztof Kozlowski <k.kozlowski@xxxxxxxxxxx>
---
drivers/regulator/max77802.c | 108 +++++++++++++++----------------------------
1 file changed, 37 insertions(+), 71 deletions(-)

diff --git a/drivers/regulator/max77802.c b/drivers/regulator/max77802.c
index 60daca2028e9..2cb938610230 100644
--- a/drivers/regulator/max77802.c
+++ b/drivers/regulator/max77802.c
@@ -70,7 +70,9 @@ static unsigned int ramp_table_77802_4bit[] = {
};

struct max77802_regulator_prv {
+ /* Array indexed by regulator id */
unsigned int opmode[MAX77802_REG_MAX];
+ bool missing_of_node;
};

static inline int max77802_map_mode(int mode)
@@ -362,6 +364,7 @@ static struct regulator_ops max77802_buck_dvs_ops = {
/* LDOs 3-7, 9-14, 18-26, 28, 29, 32-34 */
#define regulator_77802_desc_p_ldo(num, supply, log) { \
.name = "LDO"#num, \
+ .of_match = of_match_ptr("LDO"#num), \
.id = MAX77802_LDO##num, \
.supply_name = "inl"#supply, \
.ops = &max77802_ldo_ops_logic##log, \
@@ -380,6 +383,7 @@ static struct regulator_ops max77802_buck_dvs_ops = {
/* LDOs 1, 2, 8, 15, 17, 27, 30, 35 */
#define regulator_77802_desc_n_ldo(num, supply, log) { \
.name = "LDO"#num, \
+ .of_match = of_match_ptr("LDO"#num), \
.id = MAX77802_LDO##num, \
.supply_name = "inl"#supply, \
.ops = &max77802_ldo_ops_logic##log, \
@@ -398,6 +402,7 @@ static struct regulator_ops max77802_buck_dvs_ops = {
/* BUCKs 1, 6 */
#define regulator_77802_desc_16_buck(num) { \
.name = "BUCK"#num, \
+ .of_match = of_match_ptr("BUCK"#num), \
.id = MAX77802_BUCK##num, \
.supply_name = "inb"#num, \
.ops = &max77802_buck_16_dvs_ops, \
@@ -416,6 +421,7 @@ static struct regulator_ops max77802_buck_dvs_ops = {
/* BUCKS 2-4 */
#define regulator_77802_desc_234_buck(num) { \
.name = "BUCK"#num, \
+ .of_match = of_match_ptr("BUCK"#num), \
.id = MAX77802_BUCK##num, \
.supply_name = "inb"#num, \
.ops = &max77802_buck_234_ops, \
@@ -435,6 +441,7 @@ static struct regulator_ops max77802_buck_dvs_ops = {
/* BUCK 5 */
#define regulator_77802_desc_buck5(num) { \
.name = "BUCK"#num, \
+ .of_match = of_match_ptr("BUCK"#num), \
.id = MAX77802_BUCK##num, \
.supply_name = "inb"#num, \
.ops = &max77802_buck_dvs_ops, \
@@ -453,6 +460,7 @@ static struct regulator_ops max77802_buck_dvs_ops = {
/* BUCKs 7-10 */
#define regulator_77802_desc_buck7_10(num) { \
.name = "BUCK"#num, \
+ .of_match = of_match_ptr("BUCK"#num), \
.id = MAX77802_BUCK##num, \
.supply_name = "inb"#num, \
.ops = &max77802_buck_dvs_ops, \
@@ -513,83 +521,31 @@ static struct regulator_desc regulators[] = {
regulator_77802_desc_n_ldo(35, 2, 1),
};

-#ifdef CONFIG_OF
-static int max77802_pmic_dt_parse_pdata(struct platform_device *pdev,
- struct max77686_platform_data *pdata)
-{
- struct max77686_dev *iodev = dev_get_drvdata(pdev->dev.parent);
- struct device_node *pmic_np, *regulators_np;
- struct max77686_regulator_data *rdata;
- struct of_regulator_match rmatch;
- unsigned int i;
-
- pmic_np = iodev->dev->of_node;
- regulators_np = of_get_child_by_name(pmic_np, "regulators");
- if (!regulators_np) {
- dev_err(&pdev->dev, "could not find regulators sub-node\n");
- return -EINVAL;
- }
-
- pdata->num_regulators = ARRAY_SIZE(regulators);
- rdata = devm_kzalloc(&pdev->dev, sizeof(*rdata) *
- pdata->num_regulators, GFP_KERNEL);
- if (!rdata) {
- of_node_put(regulators_np);
- return -ENOMEM;
- }
-
- for (i = 0; i < pdata->num_regulators; i++) {
- rmatch.name = regulators[i].name;
- rmatch.init_data = NULL;
- rmatch.of_node = NULL;
- if (of_regulator_match(&pdev->dev, regulators_np, &rmatch,
- 1) != 1) {
- dev_warn(&pdev->dev, "No matching regulator for '%s'\n",
- rmatch.name);
- continue;
- }
- rdata[i].initdata = rmatch.init_data;
- rdata[i].of_node = rmatch.of_node;
- rdata[i].id = regulators[i].id;
- }
-
- pdata->regulators = rdata;
- of_node_put(regulators_np);
-
- return 0;
-}
-#else
-static int max77802_pmic_dt_parse_pdata(struct platform_device *pdev,
- struct max77686_platform_data *pdata)
-{
- return 0;
-}
-#endif /* CONFIG_OF */
-
static int max77802_pmic_probe(struct platform_device *pdev)
{
struct max77686_dev *iodev = dev_get_drvdata(pdev->dev.parent);
- struct max77686_platform_data *pdata = dev_get_platdata(iodev->dev);
struct max77802_regulator_prv *max77802;
- int i, ret = 0, val;
+ int i, val;
struct regulator_config config = { };

- /* This is allocated by the MFD driver */
- if (!pdata) {
- dev_err(&pdev->dev, "no platform data found for regulator\n");
- return -ENODEV;
- }
-
max77802 = devm_kzalloc(&pdev->dev,
sizeof(struct max77802_regulator_prv),
GFP_KERNEL);
if (!max77802)
return -ENOMEM;

- if (iodev->dev->of_node) {
- ret = max77802_pmic_dt_parse_pdata(pdev, pdata);
- if (ret)
- return ret;
+ if (!pdev->dev.of_node) {
+ /*
+ * Backward DTS compatiblity where regulator driver had not
+ * a compatible property for itself.
+ */
+ if (!iodev->dev->of_node) {
+ dev_err(&pdev->dev, "No OF node for driver and its parent\n");
+ return -EINVAL;
+ }
+ pdev->dev.of_node = of_get_child_by_name(iodev->dev->of_node,
+ "regulators");
+ max77802->missing_of_node = true;
}

config.dev = iodev->dev;
@@ -599,11 +555,9 @@ static int max77802_pmic_probe(struct platform_device *pdev)

for (i = 0; i < MAX77802_REG_MAX; i++) {
struct regulator_dev *rdev;
- int id = pdata->regulators[i].id;
+ int id = regulators[i].id;
int shift = max77802_get_opmode_shift(id);
-
- config.init_data = pdata->regulators[i].initdata;
- config.of_node = pdata->regulators[i].of_node;
+ int ret;

ret = regmap_read(iodev->regmap, regulators[i].enable_reg, &val);
if (ret < 0) {
@@ -627,15 +581,26 @@ static int max77802_pmic_probe(struct platform_device *pdev)
rdev = devm_regulator_register(&pdev->dev,
&regulators[i], &config);
if (IS_ERR(rdev)) {
+ ret = PTR_ERR(rdev);
dev_err(&pdev->dev,
- "regulator init failed for %d\n", i);
- return PTR_ERR(rdev);
+ "regulator init failed for %d: %d\n", i, ret);
+ return ret;
}
}

return 0;
}

+static int max77802_pmic_remove(struct platform_device *pdev)
+{
+ struct max77802_regulator_prv *max77802 = platform_get_drvdata(pdev);
+
+ if (max77802->missing_of_node)
+ of_node_put(pdev->dev.of_node);
+
+ return 0;
+}
+
static const struct platform_device_id max77802_pmic_id[] = {
{"max77802-pmic", 0},
{ },
@@ -648,6 +613,7 @@ static struct platform_driver max77802_pmic_driver = {
.owner = THIS_MODULE,
},
.probe = max77802_pmic_probe,
+ .remove = max77802_pmic_remove,
.id_table = max77802_pmic_id,
};

--
1.9.1

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