linux-kernel - Re: [PATCH 5/5] regulator: Remove unnecessary ena

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Message-id: <5433A9CD.8090007@samsung.com>
Date:	Tue, 07 Oct 2014 10:52:29 +0200
From:	Krzysztof Kozłowski <k.kozlowski@...sung.com>
To:	Markus Pargmann <mpa@...gutronix.de>,
	Mark Brown <broonie@...nel.org>
Cc:	kernel@...gutronix.de, Liam Girdwood <lgirdwood@...il.com>,
	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 5/5] regulator: Remove unnecessary ena_gpio initializations

On 06.10.2014 22:17, Markus Pargmann wrote:
> It is not necessary to setup config.ena_gpio with -EINVAL or similar.
> This patch removes these unnecessary initializations.
>
> Signed-off-by: Markus Pargmann <mpa@...gutronix.de>
> ---
>   drivers/regulator/pfuze100-regulator.c | 1 -
>   drivers/regulator/s5m8767.c            | 2 --
>   2 files changed, 3 deletions(-)
>
> diff --git a/drivers/regulator/pfuze100-regulator.c b/drivers/regulator/pfuze100-regulator.c
> index c879dff597ee..d7455ee309bf 100644
> --- a/drivers/regulator/pfuze100-regulator.c
> +++ b/drivers/regulator/pfuze100-regulator.c
> @@ -509,7 +509,6 @@ static int pfuze100_regulator_probe(struct i2c_client *client,
>   		config.init_data = init_data;
>   		config.driver_data = pfuze_chip;
>   		config.of_node = match_of_node(i);
> -		config.ena_gpio = -EINVAL;
>
>   		pfuze_chip->regulators[i] =
>   			devm_regulator_register(&client->dev, desc, &config);
> diff --git a/drivers/regulator/s5m8767.c b/drivers/regulator/s5m8767.c
> index d258e6613831..2c7817f12516 100644
> --- a/drivers/regulator/s5m8767.c
> +++ b/drivers/regulator/s5m8767.c
> @@ -949,8 +949,6 @@ static int s5m8767_pmic_probe(struct platform_device *pdev)
>   		config.driver_data = s5m8767;
>   		config.regmap = iodev->regmap_pmic;
>   		config.of_node = pdata->regulators[i].reg_node;
> -		config.ena_gpio = -EINVAL;
> -		config.ena_gpio_flags = 0;
>   		if (gpio_is_valid(pdata->regulators[i].ext_control_gpio))
>   			s5m8767_regulator_config_ext_control(s5m8767,
>   					&pdata->regulators[i], &config);

This would bring back problem with carried over ena_gpio (commit 
f4fbb3ce342bc1 "regulator: s5m8767: Fix carried over ena_gpio assignment").

The "config" is re-used in loop for next regulators. This means that the 
"config.ena_gpio" has to be set here to prevent using the same value for 
next regulator.

I think these lines shouldn't be removed.

Best regards,
Krzysztof
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