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From: Mark Brown <broonie-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>
To: Maciej Purski <m.purski-Sze3O3UU22JBDgjK7y7TUQ@public.gmane.org>
Cc: linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
	devicetree-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
	Liam Girdwood <lgirdwood-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>,
	Rob Herring <robh+dt-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>,
	Mark Rutland <mark.rutland-5wv7dgnIgG8@public.gmane.org>,
	Marek Szyprowski
	<m.szyprowski-Sze3O3UU22JBDgjK7y7TUQ@public.gmane.org>,
	Bartlomiej Zolnierkiewicz
	<b.zolnierkie-Sze3O3UU22JBDgjK7y7TUQ@public.gmane.org>
Subject: Re: [PATCH v3 4/4] regulator: core: Balance coupled regulators voltages
Date: Tue, 12 Dec 2017 11:54:27 +0000	[thread overview]
Message-ID: <20171212115427.GG16323@sirena.org.uk> (raw)
In-Reply-To: <1512639975-22241-5-git-send-email-m.purski-Sze3O3UU22JBDgjK7y7TUQ@public.gmane.org>

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On Thu, Dec 07, 2017 at 10:46:15AM +0100, Maciej Purski wrote:

> @@ -2447,10 +2482,9 @@ static int _regulator_is_enabled(struct regulator_dev *rdev)
>  	return rdev->desc->ops->is_enabled(rdev);
>  }
>  
> -static int _regulator_list_voltage(struct regulator *regulator,
> -				    unsigned selector, int lock)
> +static int _regulator_list_voltage(struct regulator_dev *rdev,
> +				   unsigned selector, int lock)
>  {

Please split this refactoring of _list_voltage() into a separate patch
for ease of review.  It can go in separately which will make this change
smaller and easier to review.

> @@ -2928,6 +2961,35 @@ static int regulator_set_voltage_unlocked(struct regulator *regulator,
>  	if (ret < 0)
>  		goto out2;
>  
> +	/*
> +	 * If the regulator is not coupled just set voltage normally, else
> +	 * return after changing consumer demands without changing voltage.
> +	 * This will be handled outside the function
> +	 * by regulator_balance_coupled()
> +	 */
> +	if (!rdev->coupling_desc) {
> +		ret = regulator_set_voltage_rdev(regulator->rdev,
> +						 min_uV, max_uV);
> +		if (ret < 0)
> +			goto out2;
> +	}

As I think I said on the previous version I'm not enthusiastic about
having two separate code paths for setting the voltage, it makes it much
more likely that things will break especially given how rare coupled
regulators are.  It would be cleaner to make uncoupled regulators just
be a special case of coupled regulators, that way more of the code is
shared.  To that end I'd adjust the code so that we always have a
coupling descriptor and then handle the case where there's only one
regulator described in there.

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  parent reply	other threads:[~2017-12-12 11:54 UTC|newest]

Thread overview: 16+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <CGME20171207094720eucas1p1eb1c8c2d0e222082ce6918807c4ad492@eucas1p1.samsung.com>
2017-12-07  9:46 ` [PATCH v3 0/4] Add coupled regulators mechanism Maciej Purski
     [not found]   ` <CGME20171207094751eucas1p1c10de599329e2c7ece77c8a5ed939401@eucas1p1.samsung.com>
2017-12-07  9:46     ` [PATCH v3 1/4] regulator: core: Move of_find_regulator_by_node() to of_regulator.c Maciej Purski
2018-01-26 17:35       ` Applied "regulator: core: Move of_find_regulator_by_node() to of_regulator.c" to the regulator tree Mark Brown
     [not found]   ` <CGME20171207094753eucas1p27b835787f92a1da8c46b9a2692376288@eucas1p2.samsung.com>
2017-12-07  9:46     ` [PATCH v3 3/4] regulator: core: Parse coupled regulators properties Maciej Purski
     [not found]       ` <1512639975-22241-4-git-send-email-m.purski-Sze3O3UU22JBDgjK7y7TUQ@public.gmane.org>
2017-12-12 11:35         ` Mark Brown
2017-12-21 10:08           ` Maciej Purski
     [not found]             ` <4866dd1c-e9bb-24e4-9b4a-294d01edde78-Sze3O3UU22JBDgjK7y7TUQ@public.gmane.org>
2017-12-21 12:02               ` Mark Brown
     [not found]   ` <CGME20171207094752eucas1p2ca38d1197d8057cb92b33a81a9942915@eucas1p2.samsung.com>
     [not found]     ` <1512639975-22241-1-git-send-email-m.purski-Sze3O3UU22JBDgjK7y7TUQ@public.gmane.org>
2017-12-07  9:46       ` [PATCH v3 2/4] regulator: bindings: Add properties for coupled regulators Maciej Purski
2017-12-07 23:30         ` Rob Herring
2018-03-02 12:55         ` Applied "regulator: bindings: Add properties for coupled regulators" to the regulator tree Mark Brown
2017-12-07  9:46       ` [PATCH v3 4/4] regulator: core: Balance coupled regulators voltages Maciej Purski
     [not found]         ` <1512639975-22241-5-git-send-email-m.purski-Sze3O3UU22JBDgjK7y7TUQ@public.gmane.org>
2017-12-12 11:54           ` Mark Brown [this message]
2017-12-13  9:25             ` Maciej Purski
2017-12-15 15:19               ` Mark Brown
2017-12-21 13:29                 ` Maciej Purski
     [not found]                   ` <d7555270-5be3-a104-233c-ac0e6383f41b-Sze3O3UU22JBDgjK7y7TUQ@public.gmane.org>
2017-12-21 13:34                     ` Mark Brown

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