linux-kernel - Re: [PATCH 3/4] mfd: cs5535-mfd: Register clients using their own dedicated MFD cell entries

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Message-ID: <20191018160636.pt4im3m3hlruobms@holly.lan>
Date:   Fri, 18 Oct 2019 17:06:36 +0100
From:   Daniel Thompson <daniel.thompson@...aro.org>
To:     Lee Jones <lee.jones@...aro.org>
Cc:     broonie@...nel.org, linus.walleij@...aro.org, arnd@...db.de,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        dilinger@...ued.net
Subject: Re: [PATCH 3/4] mfd: cs5535-mfd: Register clients using their own
 dedicated MFD cell entries

On Fri, Oct 18, 2019 at 01:56:07PM +0100, Lee Jones wrote:
> CS5535 is the only user of mfd_clone_cell().  It makes more sense to
> register child devices in the traditional way and remove the quite
> bespoke mfd_clone_cell() call from the MFD API.

Like the other thread... this looks like it takes a shared (cloned)
reference counter and creates two independant ones instead.


Daniel.

> 
> Signed-off-by: Lee Jones <lee.jones@...aro.org>
> ---
>  drivers/mfd/cs5535-mfd.c | 34 +++++++++++++++++++++++++++++-----
>  1 file changed, 29 insertions(+), 5 deletions(-)
> 
> diff --git a/drivers/mfd/cs5535-mfd.c b/drivers/mfd/cs5535-mfd.c
> index b01e5bb4ed03..2711e6e42742 100644
> --- a/drivers/mfd/cs5535-mfd.c
> +++ b/drivers/mfd/cs5535-mfd.c
> @@ -95,9 +95,23 @@ static struct mfd_cell cs5535_mfd_cells[] = {
>  	},
>  };
>  
> -static const char *olpc_acpi_clones[] = {
> -	"olpc-xo1-pm-acpi",
> -	"olpc-xo1-sci-acpi"
> +static struct mfd_cell cs5535_olpc_mfd_cells[] = {
> +	{
> +		.name = "olpc-xo1-pm-acpi",
> +		.num_resources = 1,
> +		.resources = &cs5535_mfd_resources[ACPI_BAR],
> +
> +		.enable = cs5535_mfd_res_enable,
> +		.disable = cs5535_mfd_res_disable,
> +	},
> +	{
> +		.name = "olpc-xo1-sci-acpi",
> +		.num_resources = 1,
> +		.resources = &cs5535_mfd_resources[ACPI_BAR],
> +
> +		.enable = cs5535_mfd_res_enable,
> +		.disable = cs5535_mfd_res_disable,
> +	},
>  };
>  
>  static int cs5535_mfd_probe(struct pci_dev *pdev,
> @@ -130,8 +144,18 @@ static int cs5535_mfd_probe(struct pci_dev *pdev,
>  		goto err_disable;
>  	}
>  
> -	if (machine_is_olpc())
> -		mfd_clone_cell("cs5535-acpi", olpc_acpi_clones, ARRAY_SIZE(olpc_acpi_clones));
> +	if (machine_is_olpc()) {
> +		err = mfd_add_devices(&pdev->dev, PLATFORM_DEVID_NONE,
> +				      cs5535_olpc_mfd_cells,
> +				      ARRAY_SIZE(cs5535_olpc_mfd_cells),
> +				      NULL, 0, NULL);
> +		if (err) {
> +			dev_err(&pdev->dev,
> +				"Failed to add CS5532 OLPC sub-devices: %d\n",
> +				err);
> +			goto err_disable;
> +		}
> +	}
>  
>  	dev_info(&pdev->dev, "%zu devices registered.\n",
>  			ARRAY_SIZE(cs5535_mfd_cells));
> -- 
> 2.17.1
>