linux-kernel - Re: [PATCH 1/2] mfd: Add placeholders for WM8350 client devices

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Date:	Mon, 13 Oct 2008 15:37:08 +0200
From:	Samuel Ortiz <sameo@...nedhand.com>
To:	Mark Brown <broonie@...nsource.wolfsonmicro.com>
Cc:	Liam Girdwood <lrg@...mlogic.co.uk>, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/2] mfd: Add placeholders for WM8350 client devices

Hi Mark,
Hi Mark,

a few comments:

On Mon, Oct 13, 2008 at 12:36:31PM +0100, Mark Brown wrote:
> In order to avoid merge problems further down the line add placeholders
> for several of the WM8350 client devices and register them, otherwise
> the patches adding the client devices will all try to update the same
> code.
> 
> Signed-off-by: Mark Brown <broonie@...nsource.wolfsonmicro.com>
> ---
>  drivers/mfd/wm8350-core.c         |   20 ++++++++++++++++++++
>  include/linux/mfd/wm8350/audio.h  |    6 ++++++
>  include/linux/mfd/wm8350/core.h   |   10 ++++++++++
>  include/linux/mfd/wm8350/gpio.h   |    6 ++++++
>  include/linux/mfd/wm8350/rtc.h    |    6 ++++++
>  include/linux/mfd/wm8350/supply.h |    6 ++++++
>  include/linux/mfd/wm8350/wdt.h    |    8 +++++++-
>  7 files changed, 61 insertions(+), 1 deletions(-)
> 
> diff --git a/drivers/mfd/wm8350-core.c b/drivers/mfd/wm8350-core.c
> index cd1f76e..8554855 100644
> --- a/drivers/mfd/wm8350-core.c
> +++ b/drivers/mfd/wm8350-core.c
> @@ -1234,6 +1234,15 @@ int wm8350_device_init(struct wm8350 *wm8350, int irq,
>  
>  	wm8350_reg_write(wm8350, WM8350_SYSTEM_INTERRUPTS_MASK, 0x0);
>  
> +	wm8350_client_dev_register(wm8350, "wm8350-codec",
> +				   &(wm8350->codec.pdev));
> +	wm8350_client_dev_register(wm8350, "wm8350-gpio",
> +				   &(wm8350->gpio.pdev));
> +	wm8350_client_dev_register(wm8350, "wm8350-power",
> +				   &(wm8350->power.pdev));
> +	wm8350_client_dev_register(wm8350, "wm8350-rtc", &(wm8350->rtc.pdev));
> +	wm8350_client_dev_register(wm8350, "wm8350-wdt", &(wm8350->wdt.pdev));
> +
>  	return 0;
>  
>  err:
> @@ -1250,6 +1259,17 @@ void wm8350_device_exit(struct wm8350 *wm8350)
>  		if (wm8350->pmic.pdev[i] != NULL)
>  			platform_device_unregister(wm8350->pmic.pdev[i]);
>  
> +	if (wm8350->wdt.pdev)
> +		platform_device_unregister(wm8350->wdt.pdev);
> +	if (wm8350->rtc.pdev)
> +		platform_device_unregister(wm8350->rtc.pdev);
> +	if (wm8350->power.pdev)
> +		platform_device_unregister(wm8350->power.pdev);
> +	if (wm8350->gpio.pdev)
> +		platform_device_unregister(wm8350->gpio.pdev);
> +	if (wm8350->codec.pdev)
> +		platform_device_unregister(wm8350->codec.pdev);
You don't need to check for pdev here, platform_device_unregister does
that for you.


>  	free_irq(wm8350->chip_irq, wm8350);
>  	flush_work(&wm8350->irq_work);
>  	kfree(wm8350->reg_cache);
> diff --git a/include/linux/mfd/wm8350/audio.h b/include/linux/mfd/wm8350/audio.h
> index 43342f7..217bb22 100644
> --- a/include/linux/mfd/wm8350/audio.h
> +++ b/include/linux/mfd/wm8350/audio.h
> @@ -13,6 +13,8 @@
>  #ifndef __LINUX_MFD_WM8350_AUDIO_H_
>  #define __LINUX_MFD_WM8350_AUDIO_H_
>  
> +#include <linux/platform_device.h>
> +
>  #define WM8350_CLOCK_CONTROL_1                  0x28
>  #define WM8350_CLOCK_CONTROL_2                  0x29
>  #define WM8350_FLL_CONTROL_1                    0x2A
> @@ -589,4 +591,8 @@
>  #define WM8350_IRQ_CODEC_MICSCD			41
>  #define WM8350_IRQ_CODEC_MICD			42
>  
> +struct wm8350_codec {
> +	struct platform_device *pdev;
> +};
> +
>  #endif
> diff --git a/include/linux/mfd/wm8350/core.h b/include/linux/mfd/wm8350/core.h
> index 348101c..6ebf97f 100644
> --- a/include/linux/mfd/wm8350/core.h
> +++ b/include/linux/mfd/wm8350/core.h
> @@ -17,7 +17,12 @@
>  #include <linux/mutex.h>
>  #include <linux/workqueue.h>
>  
> +#include <linux/mfd/wm8350/audio.h>
> +#include <linux/mfd/wm8350/gpio.h>
>  #include <linux/mfd/wm8350/pmic.h>
> +#include <linux/mfd/wm8350/rtc.h>
> +#include <linux/mfd/wm8350/supply.h>
> +#include <linux/mfd/wm8350/wdt.h>
>  
>  /*
>   * Register values.
> @@ -574,7 +579,12 @@ struct wm8350 {
>  	int chip_irq;
>  
>  	/* Client devices */
> +	struct wm8350_codec codec;
> +	struct wm8350_gpio gpio;
>  	struct wm8350_pmic pmic;
> +	struct wm8350_power power;
> +	struct wm8350_rtc rtc;
> +	struct wm8350_wdt wdt;
>  };
>  
>  /**
> diff --git a/include/linux/mfd/wm8350/gpio.h b/include/linux/mfd/wm8350/gpio.h
> index c6cd2ca..ed91e8f 100644
> --- a/include/linux/mfd/wm8350/gpio.h
> +++ b/include/linux/mfd/wm8350/gpio.h
> @@ -13,6 +13,8 @@
>  #ifndef __LINUX_MFD_WM8350_GPIO_H_
>  #define __LINUX_MFD_WM8350_GPIO_H_
>  
> +#include <linux/platform_device.h>
> +
>  /*
>   * GPIO Registers.
>   */
> @@ -328,6 +330,10 @@ struct wm8350;
>  int wm8350_gpio_config(struct wm8350 *wm8350, int gpio, int dir, int func,
>  		       int pol, int pull, int invert, int debounce);
>  
> +struct wm8350_gpio {
> +	struct platform_device *pdev;
> +};
I guess you're planning to add more stuff to those structures at some point ?

Cheers,
Samuel.

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Intel Open Source Technology Centre
http://oss.intel.com/
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