linux-kernel - Re: [RFC v5 net-next 07/13] mfd: ocelot: enable the external switch interface

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Date:   Wed, 29 Dec 2021 15:24:43 +0000
From:   Lee Jones <lee.jones@...aro.org>
To:     Colin Foster <colin.foster@...advantage.com>
Cc:     linux-gpio@...r.kernel.org, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        Linus Walleij <linus.walleij@...aro.org>,
        Russell King <linux@...linux.org.uk>,
        Heiner Kallweit <hkallweit1@...il.com>,
        Jakub Kicinski <kuba@...nel.org>,
        "David S. Miller" <davem@...emloft.net>,
        Florian Fainelli <f.fainelli@...il.com>,
        Vivien Didelot <vivien.didelot@...il.com>,
        Andrew Lunn <andrew@...n.ch>, UNGLinuxDriver@...rochip.com,
        Alexandre Belloni <alexandre.belloni@...tlin.com>,
        Claudiu Manoil <claudiu.manoil@....com>,
        Vladimir Oltean <vladimir.oltean@....com>
Subject: Re: [RFC v5 net-next 07/13] mfd: ocelot: enable the external switch
 interface

On Sat, 18 Dec 2021, Colin Foster wrote:

> Add the ocelot-ext child device to the MFD. This will enable device-tree
> configuration of the MFD to include the external switch, if desired.
> 
> Signed-off-by: Colin Foster <colin.foster@...advantage.com>
> ---
>  drivers/mfd/ocelot-core.c | 15 +++++++++++++--
>  1 file changed, 13 insertions(+), 2 deletions(-)

Please squash this into the driver creation patch.

> diff --git a/drivers/mfd/ocelot-core.c b/drivers/mfd/ocelot-core.c
> index 09132ea52760..52aa7b824d02 100644
> --- a/drivers/mfd/ocelot-core.c
> +++ b/drivers/mfd/ocelot-core.c
> @@ -6,6 +6,7 @@
>  #include <asm/byteorder.h>
>  #include <linux/spi/spi.h>
>  #include <linux/kconfig.h>
> +#include <linux/mfd/core.h>
>  #include <linux/module.h>
>  #include <linux/regmap.h>
>  
> @@ -103,6 +104,13 @@ struct regmap *ocelot_mfd_get_regmap_from_resource(struct device *dev,
>  }
>  EXPORT_SYMBOL(ocelot_mfd_get_regmap_from_resource);
>  
> +static const struct mfd_cell vsc7512_devs[] = {
> +	{
> +		.name = "ocelot-ext-switch",
> +		.of_compatible = "mscc,vsc7512-ext-switch",
> +	},
> +};
> +
>  int ocelot_mfd_init(struct ocelot_mfd_config *config)
>  {
>  	struct device *dev = config->dev;
> @@ -139,7 +147,10 @@ int ocelot_mfd_init(struct ocelot_mfd_config *config)
>  		return ret;
>  	}
>  
> -	/* Create and loop over all child devices here */
> +	ret = mfd_add_devices(dev, PLATFORM_DEVID_NONE, vsc7512_devs,
> +			      ARRAY_SIZE(vsc7512_devs), NULL, 0, NULL);
> +
> +	dev_info(dev, "ocelot mfd core setup complete\n");
>  
>  	return 0;
>  }
> @@ -147,7 +158,7 @@ EXPORT_SYMBOL(ocelot_mfd_init);
>  
>  int ocelot_mfd_remove(struct ocelot_mfd_config *config)
>  {
> -	/* Loop over all children and remove them */
> +	mfd_remove_devices(config->dev);
>  
>  	return 0;
>  }

-- 
Lee Jones [李琼斯]
Senior Technical Lead - Developer Services
Linaro.org │ Open source software for Arm SoCs
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