Re: [PATCH] Add static bus numbering support to i2c-versatile

[Jean Delvare <khali-PUYAD+kWke1g9hUCZPvPmw@public.gmane.org>]

On Mon, 09 Feb 2009 18:03:38 +0000, Catalin Marinas wrote:
> If dev->id is not -1, the platform code may use static bus numbering
> rather than dynamic. The patch also changes the i2c_versatile_init to a
> subsys_initcall rather than module_init to make sure it is initialised
> before the I2C devices initialisation.
> 
> Signed-off-by: Catalin Marinas <catalin.marinas-5wv7dgnIgG8@public.gmane.org>
> Cc: Russell King <rmk-lFZ/pmaqli7XmaaqVzeoHQ@public.gmane.org>
> ---
>  drivers/i2c/busses/i2c-versatile.c |   11 +++++++++--
>  1 files changed, 9 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/i2c/busses/i2c-versatile.c b/drivers/i2c/busses/i2c-versatile.c
> index 4678bab..15b5e8a 100644
> --- a/drivers/i2c/busses/i2c-versatile.c
> +++ b/drivers/i2c/busses/i2c-versatile.c
> @@ -96,13 +96,20 @@ static int i2c_versatile_probe(struct platform_device *dev)
>  	writel(SCL | SDA, i2c->base + I2C_CONTROLS);
>  
>  	i2c->adap.owner = THIS_MODULE;
> +	if (dev->id >= 0)
> +		i2c->adap.nr = dev->id;
>  	strlcpy(i2c->adap.name, "Versatile I2C adapter", sizeof(i2c->adap.name));
>  	i2c->adap.algo_data = &i2c->algo;
>  	i2c->adap.dev.parent = &dev->dev;
>  	i2c->algo = i2c_versatile_algo;
>  	i2c->algo.data = i2c;
>  
> -	ret = i2c_bit_add_bus(&i2c->adap);
> +	if (dev->id >= 0)
> +		/* static bus numbering */
> +		ret = i2c_bit_add_numbered_bus(&i2c->adap);
> +	else
> +		/* dynamic bus numbering */
> +		ret = i2c_bit_add_bus(&i2c->adap);

Why don't you merge both tests? This would simplify the code and make
it clearer.

>  	if (ret >= 0) {
>  		platform_set_drvdata(dev, i2c);
>  		return 0;
> @@ -146,7 +153,7 @@ static void __exit i2c_versatile_exit(void)
>  	platform_driver_unregister(&i2c_versatile_driver);
>  }
>  
> -module_init(i2c_versatile_init);
> +subsys_initcall(i2c_versatile_init);
>  module_exit(i2c_versatile_exit);
>  
>  MODULE_DESCRIPTION("ARM Versatile I2C bus driver");

-- 
Jean Delvare