linux-kernel - Re: [PATCH v3 4/8] mfd: cros_ec_dev: Register cros-ec-rtc driver as a subdevice.

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Message-ID: <20180307155158.7quxpjglnocxjxku@dell>
Date:   Wed, 7 Mar 2018 15:51:58 +0000
From:   Lee Jones <lee.jones@...aro.org>
To:     Enric Balletbo i Serra <enric.balletbo@...labora.com>
Cc:     groeck@...omium.org, andy.shevchenko@...il.com,
        kernel@...labora.com, gwendal@...omium.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v3 4/8] mfd: cros_ec_dev: Register cros-ec-rtc driver as
 a subdevice.

On Mon, 26 Feb 2018, Enric Balletbo i Serra wrote:

> Check whether this EC instance has RTC host command support and instatiate
> the RTC driver as a subdevice in such case.
> 
> Signed-off-by: Enric Balletbo i Serra <enric.balletbo@...labora.com>
> Reviewed-by: Gwendal Grignou <gwendal@...omium.org>
> Reviewed-by: Andy Shevchenko <andy.shevchenko@...il.com>
> ---
> 
> Changes in v3:
> - [4/8] Add the Reviewed-by Andy Shevchenko.
> 
> Changes in v2:
> - [4/8] Add the Reviewed-by Gwendal.
> 
>  drivers/mfd/cros_ec_dev.c | 14 ++++++++++++++
>  1 file changed, 14 insertions(+)
> 
> diff --git a/drivers/mfd/cros_ec_dev.c b/drivers/mfd/cros_ec_dev.c
> index f98e5beffca6..33fe1b439ee2 100644
> --- a/drivers/mfd/cros_ec_dev.c
> +++ b/drivers/mfd/cros_ec_dev.c
> @@ -389,6 +389,10 @@ static void cros_ec_sensors_register(struct cros_ec_dev *ec)
>  	kfree(msg);
>  }
>  
> +static const struct mfd_cell cros_ec_rtc_cell = {
> +	.name = "cros-ec-rtc",
> +};
> +
>  static int ec_device_probe(struct platform_device *pdev)
>  {
>  	int retval = -ENOMEM;
> @@ -437,6 +441,16 @@ static int ec_device_probe(struct platform_device *pdev)
>  	if (cros_ec_check_features(ec, EC_FEATURE_MOTION_SENSE))
>  		cros_ec_sensors_register(ec);
>  
> +	/* check whether this EC instance has RTC host command support */

Nit: "Check ..."

> +	if (cros_ec_check_features(ec, EC_FEATURE_RTC)) {
> +		retval = mfd_add_devices(ec->dev, PLATFORM_DEVID_AUTO,
> +					 &cros_ec_rtc_cell, 1, NULL, 0, NULL);

Please use ARRAY_SIZE().

> +		if (retval)
> +			dev_err(ec->dev,
> +				"failed to add cros-ec-rtc device: %d\n",
> +				retval);
> +	}
> +
>  	/* Take control of the lightbar from the EC. */
>  	lb_manual_suspend_ctrl(ec, 1);
>  

-- 
Lee Jones
Linaro Services Technical Lead
Linaro.org │ Open source software for ARM SoCs
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