linux-kernel - Re: [PATCH v8 08/11] power: act8945a

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Message-ID: <20160831145802.hmbnddaaif6y522t@earth>
Date:   Wed, 31 Aug 2016 16:58:02 +0200
From:   Sebastian Reichel <sre@...nel.org>
To:     Wenyou Yang <wenyou.yang@...el.com>
Cc:     Dmitry Eremin-Solenikov <dbaryshkov@...il.com>,
        David Woodhouse <dwmw2@...radead.org>,
        Rob Herring <robh+dt@...nel.org>,
        Pawel Moll <pawel.moll@....com>,
        Mark Brown <broonie@...nel.org>,
        Ian Campbell <ijc+devicetree@...lion.org.uk>,
        Kumar Gala <galak@...eaurora.org>,
        Lee Jones <lee.jones@...aro.org>,
        Nicolas Ferre <nicolas.ferre@...el.com>,
        Alexandre Belloni <alexandre.belloni@...e-electrons.com>,
        linux-kernel@...r.kernel.org, devicetree@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-pm@...r.kernel.org
Subject: Re: [PATCH v8 08/11] power: act8945a_charger: Add max current
 property

Hi,

On Thu, Aug 25, 2016 at 03:19:56PM +0800, Wenyou Yang wrote:
> Add the power supply's current max property,
> POWER_SUPPLY_PROP_CURRENT_MAX.

[...]
  
> -	chglev_pin = of_get_named_gpio_flags(np,
> -				"active-semi,chglev-gpios", 0, &flags);
> -
> -	if (gpio_is_valid(chglev_pin)) {
> -		gpio_set_value(chglev_pin,
> -			       ((flags == OF_GPIO_ACTIVE_LOW) ? 0 : 1));
> +	charger->chglev_gpio = devm_gpiod_get(dev,
> +					      "active-semi,chglev", GPIOD_IN);
> +	if (PTR_ERR(charger->chglev_gpio) == -EPROBE_DEFER) {
> +		dev_info(dev, "probe retry requested for gpio \"chglev\"\n");
> +		return -EPROBE_DEFER;
> +	} else if (IS_ERR(charger->chglev_gpio)) {
> +		dev_err(dev, "unable to claim gpio \"chglev\"\n");
> +		charger->chglev_gpio = NULL;

Please also use devm_gpiod_get_optional() here (see previous patch).

-- Sebastian

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