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SubjectRe: [PATCH 3/4] regulator: as3722: add regulator driver for AMS AS3722
On Tue, Sep 17, 2013 at 12:15:37PM +0530, Laxman Dewangan wrote:

> + ams,enable-oc-config: Enable overcurrent configuration of the
> + ams,oc-trip-threshold-perphase: Overcurrent trip threshold
> + ams,oc-alarm-threshold-perphase: Overcurrent alarm threshold

These look like you should be implementing the current setting
operations in the framework, probably mapping to the alarm limit if
nothing else.

> +static int as3722_ldo_get_voltage_sel(struct regulator_dev *rdev)
> +{
> + int ret;
> +
> + ret = regulator_get_voltage_sel_regmap(rdev);
> + if (ret >= 0x40)
> + ret -= 0x1B;
> + return ret;
> +}

This looks very strange. What's going on here? A gap in the selectors?
If that's the case you probably want to be using linear ranges.

> +static struct regulator_ops as3722_ldo_extcntrl_ops = {
> + .get_voltage_sel = as3722_ldo_get_voltage_sel,
> + .set_voltage_sel = as3722_ldo_set_voltage_sel,
> + .list_voltage = regulator_list_voltage_linear,
> +};

You ought to be providing map_voltage() too, same for some if not all of
the other regulators.

> +static unsigned int as3722_sd_get_mode(struct regulator_dev *dev)
> +{
> + struct as3722_regulators *as3722_regs = rdev_get_drvdata(dev);
> + struct as3722 *as3722 = as3722_regs->as3722;
> + int id = rdev_get_id(dev);
> + u32 val;
> + int ret;
> +
> + if (!as3722_reg_lookup[id].control_reg)
> + return -ERANGE;

That seems a bit of a random error code. -ENOTSUPP?

> +static int as3722_sd_list_voltage(struct regulator_dev *rdev, unsigned selector)
> +{
> + if (selector >= AS3722_SD2_VSEL_MAX)
> + return -EINVAL;
> +
> + selector++;
> + if (selector <= 0x40)
> + return 600000 + selector * 12500;
> + if (selector <= 0x70)
> + return 1400000 + (selector - 0x40) * 25000;
> + if (selector <= 0x7F)
> + return 2600000 + (selector - 0x70) * 50000;
> + return -EINVAL;
> +}

Use linear ranges.

> +static struct of_regulator_match as3722_regulator_matches[] = {
> + {.name = "sd0", },

{ .name = "sd0", },

> + config.of_node = as3722_regulator_matches[id].of_node;
> + rdev = regulator_register(&as3722_regs->desc[id], &config);
> + if (IS_ERR(rdev)) {

devm_regualtor_register().

> + if (reg_config->ext_control) {
> + ret = regulator_enable_regmap(rdev);
> + if (ret < 0) {
> + dev_err(&pdev->dev,
> + "Regulator %d enable failed: %d\n",
> + id, ret);
> + goto scrub;
> + }

This looks wrong... why is the regualtor being enabled by something
other than the core?

> +static int __init as3722_regulator_init(void)
> +{
> + return platform_driver_register(&as3722_regulator_driver);
> +}
> +subsys_initcall(as3722_regulator_init);
> +
> +static void __exit as3722_regulator_exit(void)
> +{
> + platform_driver_unregister(&as3722_regulator_driver);
> +}
> +module_exit(as3722_regulator_exit);

module_platform_driver().
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