linux-kernel - Re: [PATCH RFC 5/5] mfd: cs40l26: Add CODEC driver component

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Message-ID: <20230526075447.GA449117@google.com>
Date:   Fri, 26 May 2023 08:54:47 +0100
From:   Lee Jones <lee@...nel.org>
To:     Fred Treven <fred.treven@...rus.com>
Cc:     Ben Bright <ben.bright@...rus.com>,
        James Ogletree <james.ogletree@...rus.com>,
        Dmitry Torokhov <dmitry.torokhov@...il.com>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Simon Trimmer <simont@...nsource.cirrus.com>,
        Charles Keepax <ckeepax@...nsource.cirrus.com>,
        Richard Fitzgerald <rf@...nsource.cirrus.com>,
        patches@...nsource.cirrus.com, linux-input@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH RFC 5/5] mfd: cs40l26: Add CODEC driver component

On Thu, 25 May 2023, Fred Treven wrote:

> Use MFD interface to load the CODEC driver along
> with the Input FF driver.
> 
> Signed-off-by: Fred Treven <fred.treven@...rus.com>
> ---
>  drivers/input/misc/cs40l26.c | 11 +++++++++++
>  1 file changed, 11 insertions(+)
> 
> diff --git a/drivers/input/misc/cs40l26.c b/drivers/input/misc/cs40l26.c
> index 12c29cbd4ff0..35d15a6c2230 100644
> --- a/drivers/input/misc/cs40l26.c
> +++ b/drivers/input/misc/cs40l26.c
> @@ -13,6 +13,7 @@
>  #include <linux/i2c.h>
>  #include <linux/interrupt.h>
>  #include <linux/kernel.h>
> +#include <linux/mfd/core.h>

NACK.  Please do not use the MFD API outside of drivers/mfd.

>  #include <linux/pm_runtime.h>
>  #include <linux/string.h>
>  #include <linux/firmware/cirrus/wmfw.h>
> @@ -2136,6 +2137,10 @@ static inline int cs40l26_worker_init(struct cs40l26_private *cs40l26)
>  	return 0;
>  }
>  
> +static const struct mfd_cell cs40l26_devs[] = {
> +	{ .name = "cs40l26-codec" },

This is one device.  Thus, not an MFD anyway.

> +};
> +
>  static struct regulator_bulk_data cs40l26_supplies[] = {
>  	{ .supply = "VP" },
>  	{ .supply = "VA" },
> @@ -2275,6 +2280,12 @@ int cs40l26_probe(struct cs40l26_private *cs40l26)
>  	if (error)
>  		goto err;
>  
> +	error = devm_mfd_add_devices(dev, PLATFORM_DEVID_AUTO, cs40l26_devs, 1, NULL, 0, NULL);
> +	if (error) {
> +		dev_err(dev, "Failed to MFD add device %s: %d\n", cs40l26_devs[0].name, error);
> +		goto err;
> +	}
> +
>  	return 0;
>  err:
>  	cs40l26_remove(cs40l26);
> -- 
> 2.7.4
> 

-- 
Lee Jones [李琼斯]