linux-kernel - Re: [PATCH 4/4] mfd: 88pm800: Add support for clk subdevice

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Date:	Thu, 23 Jul 2015 16:50:08 +0100
From:	Lee Jones <lee.jones@...aro.org>
To:	Vaibhav Hiremath <vaibhav.hiremath@...aro.org>
Cc:	linux-arm-kernel@...ts.infradead.org, robh+dt@...nel.org,
	mturquette@...libre.com, k.kozlowski@...sung.com,
	devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
	linux-clk@...r.kernel.org
Subject: Re: [PATCH 4/4] mfd: 88pm800: Add support for clk subdevice

On Tue, 21 Jul 2015, Vaibhav Hiremath wrote:

> This patch adds mfd_cell/clk-subdevice for 88PM800 MFD
> (and family of devices).
> 
> Signed-off-by: Vaibhav Hiremath <vaibhav.hiremath@...aro.org>
> ---
>  drivers/mfd/88pm800.c | 25 +++++++++++++++++++++++++
>  1 file changed, 25 insertions(+)
> 
> diff --git a/drivers/mfd/88pm800.c b/drivers/mfd/88pm800.c
> index f104a32..9723eac 100644
> --- a/drivers/mfd/88pm800.c
> +++ b/drivers/mfd/88pm800.c
> @@ -173,6 +173,14 @@ static const struct mfd_cell regulator_devs[] = {
>  	},
>  };
>  
> +static struct mfd_cell clk_devs[] = {
> +	{
> +	 .name = "88pm80x-clk",
> +	 .of_compatible = "marvell,88pm800-clk",
> +	 .id = -1,
> +	},
> +};

Why does each device in 88pm800.c have it's own mfd_cell?

Take the opportunity to correct the tabbing in the remainder of the
file.  Make that fix-up patch 1 of this set.  Then fixup this patch.

>  static const struct regmap_irq pm800_irqs[] = {
>  	/* INT0 */
>  	[PM800_IRQ_ONKEY] = {
> @@ -344,6 +352,17 @@ static int device_regulator_init(struct pm80x_chip *chip)
>  			      ARRAY_SIZE(regulator_devs), NULL, 0, NULL);
>  }
>  
> +static int device_clk_init(struct pm80x_chip *chip)
> +{
> +	if (chip->type == CHIP_PM800)
> +		clk_devs[0].name = "88pm800-clk";
> +	else if (chip->type == CHIP_PM860)
> +		clk_devs[0].name = "88pm860-clk";
> +
> +	return mfd_add_devices(chip->dev, 0, &clk_devs[0],
> +			      ARRAY_SIZE(clk_devs), NULL, 0, NULL);
> +}
> +
>  static int device_irq_init_800(struct pm80x_chip *chip)
>  {
>  	struct regmap *map = chip->regmap;
> @@ -513,6 +532,12 @@ static int device_800_init(struct pm80x_chip *chip)
>  		goto out;
>  	}
>  
> +	ret = device_clk_init(chip);
> +	if (ret) {
> +		dev_err(chip->dev, "Failed to add clk subdev\n");
> +		goto out;
> +	}

Why do these have to be seperate?

>  	return 0;
>  out_dev:
>  	mfd_remove_devices(chip->dev);

-- 
Lee Jones
Linaro STMicroelectronics Landing Team Lead
Linaro.org │ Open source software for ARM SoCs
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