Re: [PATCH v2 2/3] regulator: da9063: implement basic XVP setter

[Matti Vaittinen <mazziesaccount@xxxxxxxxx>]

On 4/5/23 08:29, Benjamin Bara wrote:
> From: Benjamin Bara <benjamin.bara@xxxxxxxxxxx>
>
> Allow to en- and disable voltage monitoring from the device tree.
> Consider that the da9063 only monitors UV *and* OV together, so both
> must be en- or disabled.
>
> Signed-off-by: Benjamin Bara <benjamin.bara@xxxxxxxxxxx>
> ---
>   drivers/regulator/da9063-regulator.c | 100 +++++++++++++++++++++++++----------
>   1 file changed, 72 insertions(+), 28 deletions(-)
>
> diff --git a/drivers/regulator/da9063-regulator.c b/drivers/regulator/da9063-regulator.c
> index 1c720fc595b3..000fa0daef18 100644
> --- a/drivers/regulator/da9063-regulator.c
> +++ b/drivers/regulator/da9063-regulator.c
> @@ -207,6 +207,24 @@ static const unsigned int da9063_bmem_bio_merged_limits[] = {
>   	4600000, 4800000, 5000000, 5200000, 5400000, 5600000, 5800000, 6000000
>   };
>   
> +static int da9063_set_xvp(struct regulator_dev *rdev, int lim_uV, int severity, bool enable)
> +{
> +	struct da9063_regulator *regl = rdev_get_drvdata(rdev);
> +	struct device *dev = regl->hw->dev;
> +
> +	dev_dbg(dev, "%s: lim: %d, sev: %d, en: %d\n", regl->desc.name, lim_uV, severity, enable);
> +
> +	/*
> +	 * only support enable and disable.
> +	 * the da9063 offers a GPIO (GP_FB2) which is unasserted if an XV happens.
> +	 * therefore ignore severity here, as there might be handlers in hardware.
> +	 */
> +	if (lim_uV)
> +		return -EINVAL;
> +
> +	return regmap_field_write(regl->vmon, enable ? 1 : 0);
> +}
> +
>   static int da9063_buck_set_mode(struct regulator_dev *rdev, unsigned int mode)
>   {
>   	struct da9063_regulator *regl = rdev_get_drvdata(rdev);
> @@ -545,37 +563,41 @@ static int da9063_buck_get_current_limit(struct regulator_dev *rdev)
>   }
>   
>   static const struct regulator_ops da9063_buck_ops = {
> -	.enable			= regulator_enable_regmap,
> -	.disable		= regulator_disable_regmap,
> -	.is_enabled		= regulator_is_enabled_regmap,
> -	.get_voltage_sel	= regulator_get_voltage_sel_regmap,
> -	.set_voltage_sel	= regulator_set_voltage_sel_regmap,
> -	.list_voltage		= regulator_list_voltage_linear,
> -	.set_current_limit	= da9063_buck_set_current_limit,
> -	.get_current_limit	= da9063_buck_get_current_limit,
> -	.set_mode		= da9063_buck_set_mode,
> -	.get_mode		= da9063_buck_get_mode,
> -	.get_status		= da9063_buck_get_status,
> -	.set_suspend_voltage	= da9063_set_suspend_voltage,
> -	.set_suspend_enable	= da9063_suspend_enable,
> -	.set_suspend_disable	= da9063_suspend_disable,
> -	.set_suspend_mode	= da9063_buck_set_suspend_mode,
> +	.enable				= regulator_enable_regmap,
> +	.disable			= regulator_disable_regmap,
> +	.is_enabled			= regulator_is_enabled_regmap,
> +	.get_voltage_sel		= regulator_get_voltage_sel_regmap,
> +	.set_voltage_sel		= regulator_set_voltage_sel_regmap,
> +	.list_voltage			= regulator_list_voltage_linear,
> +	.set_current_limit		= da9063_buck_set_current_limit,
> +	.get_current_limit		= da9063_buck_get_current_limit,
> +	.set_mode			= da9063_buck_set_mode,
> +	.get_mode			= da9063_buck_get_mode,
> +	.get_status			= da9063_buck_get_status,
> +	.set_suspend_voltage		= da9063_set_suspend_voltage,
> +	.set_suspend_enable		= da9063_suspend_enable,
> +	.set_suspend_disable		= da9063_suspend_disable,
> +	.set_suspend_mode		= da9063_buck_set_suspend_mode,
> +	.set_over_voltage_protection	= da9063_set_xvp,
> +	.set_under_voltage_protection	= da9063_set_xvp,
>   };
>   
>   static const struct regulator_ops da9063_ldo_ops = {
> -	.enable			= regulator_enable_regmap,
> -	.disable		= regulator_disable_regmap,
> -	.is_enabled		= regulator_is_enabled_regmap,
> -	.get_voltage_sel	= regulator_get_voltage_sel_regmap,
> -	.set_voltage_sel	= regulator_set_voltage_sel_regmap,
> -	.list_voltage		= regulator_list_voltage_linear,
> -	.set_mode		= da9063_ldo_set_mode,
> -	.get_mode		= da9063_ldo_get_mode,
> -	.get_status		= da9063_ldo_get_status,
> -	.set_suspend_voltage	= da9063_set_suspend_voltage,
> -	.set_suspend_enable	= da9063_suspend_enable,
> -	.set_suspend_disable	= da9063_suspend_disable,
> -	.set_suspend_mode	= da9063_ldo_set_suspend_mode,
> +	.enable				= regulator_enable_regmap,
> +	.disable			= regulator_disable_regmap,
> +	.is_enabled			= regulator_is_enabled_regmap,
> +	.get_voltage_sel		= regulator_get_voltage_sel_regmap,
> +	.set_voltage_sel		= regulator_set_voltage_sel_regmap,
> +	.list_voltage			= regulator_list_voltage_linear,
> +	.set_mode			= da9063_ldo_set_mode,
> +	.get_mode			= da9063_ldo_get_mode,
> +	.get_status			= da9063_ldo_get_status,
> +	.set_suspend_voltage		= da9063_set_suspend_voltage,
> +	.set_suspend_enable		= da9063_suspend_enable,
> +	.set_suspend_disable		= da9063_suspend_disable,
> +	.set_suspend_mode		= da9063_ldo_set_suspend_mode,
> +	.set_over_voltage_protection	= da9063_set_xvp,
> +	.set_under_voltage_protection	= da9063_set_xvp,
>   };

During my recent visit in the IIO territory I was told to by Jonathan to 
drop the 'pretty indenting' of structs like this. I think this shows 
well why - when longer members are added, it's hard to see from the diff 
what actually changed. So, if you re-spin and unless Mark has another 
opinion, maybe drop the tabs - in my eyes this does not do much for the 
readability.

Well, IMO this is definitely not something that would require a re-spin 
- and it may be others disagree with me on this. So, FWIW:

Reviewed-by: Matti Vaittinen <mazziesaccount@xxxxxxxxx>

Yours,
	-- Matti

--
Matti Vaittinen
Linux kernel developer at ROHM Semiconductors
Oulu Finland

~~ When things go utterly wrong vim users can always type :help! ~~