linux-kernel - Re: [PATCH v7 5/7] power: act8945a_charger: Add capacity level property

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Date:   Tue, 23 Aug 2016 04:40:59 +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>,
        linux-kernel@...r.kernel.org, devicetree@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org,
        Nicolas Ferre <nicolas.ferre@...el.com>,
        linux-pm@...r.kernel.org
Subject: Re: [PATCH v7 5/7] power: act8945a_charger: Add capacity level
 property

Hi,

On Mon, Aug 22, 2016 at 02:49:15PM +0800, Wenyou Yang wrote:
> [...]
>
> +	charger->lbo_gpio = gpiod_get(dev->parent, "active-semi,lbo", GPIOD_IN);
> +	if (PTR_ERR(charger->lbo_gpio) == -EPROBE_DEFER) {
> +		dev_info(dev, "probe retry requested for gpio \"lbo\"\n");
> +	} else if (IS_ERR(charger->lbo_gpio)) {
> +		dev_err(dev, "unable to claim gpio \"lbo\"\n");
> +		charger->lbo_gpio = NULL;
> +	}
> +
> +	ret = devm_request_irq(dev, gpiod_to_irq(charger->lbo_gpio),
> +			       act8945a_status_changed,
> +			       (IRQF_TRIGGER_FALLING | IRQF_TRIGGER_RISING),
> +			       "act8945a_lbo_detect", charger);
> +	if (ret)
> +		dev_info(dev, "failed to request gpio \"lbo\" IRQ\n");

that does not work, since you need to release the irq before
releasing the gpio. So if the gpio is not requested via devm_
than you can't request the irq via devm_ (actually you can by
using devm_free_irq in remove(), but then you can also drop
the devm_ alltogether).

> [...]

-- Sebastian

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