linux-kernel - Re: [PATCHv2 1/2] mfd: cpcap: implement irq sense helper

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Message-ID: <20170302160912.GO20572@atomide.com>
Date:   Thu, 2 Mar 2017 08:09:12 -0800
From:   Tony Lindgren <tony@...mide.com>
To:     Sebastian Reichel <sre@...nel.org>
Cc:     Dmitry Torokhov <dmitry.torokhov@...il.com>,
        Lee Jones <lee.jones@...aro.org>,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        linux-input@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCHv2 1/2] mfd: cpcap: implement irq sense helper

* Sebastian Reichel <sre@...nel.org> [170301 16:24]:
> CPCAP can sense if IRQ is currently set or not. This
> functionality is required for a few subdevices, such
> as the power button and usb phy modules.
> 
> Signed-off-by: Sebastian Reichel <sre@...nel.org>
> ---
> Changes since PATCHv1:
>  - Newly introduced patch
> ---
>  drivers/mfd/motorola-cpcap.c       | 25 +++++++++++++++++++++++++
>  include/linux/mfd/motorola-cpcap.h |  2 ++
>  2 files changed, 27 insertions(+)
> 
> diff --git a/drivers/mfd/motorola-cpcap.c b/drivers/mfd/motorola-cpcap.c
> index 6aeada7d7ce5..b2a53750d579 100644
> --- a/drivers/mfd/motorola-cpcap.c
> +++ b/drivers/mfd/motorola-cpcap.c
> @@ -32,6 +32,31 @@ struct cpcap_ddata {
>  	struct regmap *regmap;
>  };
>  
> +static int cpcap_sense_irq(struct regmap *regmap, int irq)
> +{
> +	int reg = CPCAP_REG_INTS1 + (irq / 16) * 4;
> +	int mask = 1 << (irq % 16);
> +	int err, val;
> +
> +	if (irq < 0 || irq > 64)
> +		return -EINVAL;
> +
> +	err = regmap_read(regmap, reg, &val);
> +	if (err)
> +		return err;
> +
> +	return !!(val & mask);
> +}
> +
> +int cpcap_sense_virq(struct regmap *regmap, int virq)
> +{
> +	struct regmap_irq_chip_data *d = irq_get_chip_data(virq);
> +	int base = regmap_irq_chip_get_base(d);
> +
> +	return cpcap_sense_irq(regmap, virq - base);
> +}
> +EXPORT_SYMBOL_GPL(cpcap_sense_irq);

You have a typo here, should be cpcap_sense_virq for the exported one :)

Other than that my ack is still valid.

Regards,

Tony