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regulator: ab3100: refactor probe to use IDs 

This refactors the AB3100 regulator probe to use regulator IDs
and pass this to a separate registration function. This works
much smoother when migrating to device tree, as we can use a
match table with this regulator ID encoded in the .driver_data.

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
This commit is contained in:
Linus Walleij 2013-04-22 11:57:14 +02:00 committed by Mark Brown
parent 60d509fa6a
commit 9b31835341
1 changed files with 55 additions and 35 deletions
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90
drivers/regulator/ab3100.c
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@ -488,6 +488,58 @@ ab3100_regulator_desc[AB3100_NUM_REGULATORS] = {
},
};
static int ab3100_regulator_register(struct platform_device *pdev,
struct ab3100_platform_data *plfdata,
int id)
{
struct regulator_desc *desc;
struct ab3100_regulator *reg;
struct regulator_dev *rdev;
struct regulator_config config = { };
int err, i;
for (i = 0; i < AB3100_NUM_REGULATORS; i++) {
desc = &ab3100_regulator_desc[i];
if (desc->id == id)
break;
}
if (desc->id != id)
return -ENODEV;
/* Same index used for this array */
reg = &ab3100_regulators[i];
/*
* Initialize per-regulator struct.
* Inherit platform data, this comes down from the
* i2c boarddata, from the machine. So if you want to
* see what it looks like for a certain machine, go
* into the machine I2C setup.
*/
reg->dev = &pdev->dev;
if (plfdata) {
/* This will be replaced by device tree data */
reg->plfdata = plfdata;
config.init_data = &plfdata->reg_constraints[i];
}
config.dev = &pdev->dev;
config.driver_data = reg;
rdev = regulator_register(desc, &config);
if (IS_ERR(rdev)) {
err = PTR_ERR(rdev);
dev_err(&pdev->dev,
"%s: failed to register regulator %s err %d\n",
__func__, desc->name,
err);
return err;
}
/* Then set a pointer back to the registered regulator */
reg->rdev = rdev;
return 0;
}
/*
* NOTE: the following functions are regulators pluralis - it is the
* binding to the AB3100 core driver and the parent platform device
@ -497,7 +549,6 @@ ab3100_regulator_desc[AB3100_NUM_REGULATORS] = {
static int ab3100_regulators_probe(struct platform_device *pdev)
{
struct ab3100_platform_data *plfdata = pdev->dev.platform_data;
struct regulator_config config = { };
int err = 0;
u8 data;
int i;
@ -530,42 +581,11 @@ static int ab3100_regulators_probe(struct platform_device *pdev)
/* Register the regulators */
for (i = 0; i < AB3100_NUM_REGULATORS; i++) {
struct ab3100_regulator *reg = &ab3100_regulators[i];
struct regulator_dev *rdev;
struct regulator_desc *desc = &ab3100_regulator_desc[i];
/*
* Initialize per-regulator struct.
* Inherit platform data, this comes down from the
* i2c boarddata, from the machine. So if you want to
* see what it looks like for a certain machine, go
* into the machine I2C setup.
*/
reg->dev = &pdev->dev;
reg->plfdata = plfdata;
config.dev = &pdev->dev;
config.driver_data = reg;
config.init_data = &plfdata->reg_constraints[i];
/*
* Register the regulator, pass around
* the ab3100_regulator struct
*/
rdev = regulator_register(&ab3100_regulator_desc[i], &config);
if (IS_ERR(rdev)) {
err = PTR_ERR(rdev);
dev_err(&pdev->dev,
"%s: failed to register regulator %s err %d\n",
__func__, ab3100_regulator_desc[i].name,
err);
/* remove the already registered regulators */
while (--i >= 0)
regulator_unregister(ab3100_regulators[i].rdev);
err = ab3100_regulator_register(pdev, plfdata, desc->id);
if (err)
return err;
}
/* Then set a pointer back to the registered regulator */
reg->rdev = rdev;
}
return 0;