Re: [PATCH] mfd: sta2x11: Use platform_register/unregister_drivers()

[Lee Jones]

On Wed, 02 Dec 2015, Thierry Reding wrote:

> From: Thierry Reding <treding@xxxxxxxxxx>
> 
> These new helpers simplify implementing multi-driver modules and
> properly handle failure to register one driver by unregistering all
> previously registered drivers.
> 
> Signed-off-by: Thierry Reding <treding@xxxxxxxxxx>
> ---
>  drivers/mfd/sta2x11-mfd.c | 36 ++++++++++--------------------------
>  1 file changed, 10 insertions(+), 26 deletions(-)

Looks nice.  Applied, thanks.

> diff --git a/drivers/mfd/sta2x11-mfd.c b/drivers/mfd/sta2x11-mfd.c
> index b3e5c6f45105..9292202039ee 100644
> --- a/drivers/mfd/sta2x11-mfd.c
> +++ b/drivers/mfd/sta2x11-mfd.c
> @@ -372,12 +372,6 @@ static struct platform_driver sta2x11_sctl_platform_driver = {
>  	.probe		= sta2x11_sctl_probe,
>  };
>  
> -static int __init sta2x11_sctl_init(void)
> -{
> -	pr_info("%s\n", __func__);
> -	return platform_driver_register(&sta2x11_sctl_platform_driver);
> -}
> -
>  static struct platform_driver sta2x11_platform_driver = {
>  	.driver = {
>  		.name	= STA2X11_MFD_APBREG_NAME,
> @@ -385,12 +379,6 @@ static struct platform_driver sta2x11_platform_driver = {
>  	.probe		= sta2x11_apbreg_probe,
>  };
>  
> -static int __init sta2x11_apbreg_init(void)
> -{
> -	pr_info("%s\n", __func__);
> -	return platform_driver_register(&sta2x11_platform_driver);
> -}
> -
>  static struct platform_driver sta2x11_apb_soc_regs_platform_driver = {
>  	.driver = {
>  		.name	= STA2X11_MFD_APB_SOC_REGS_NAME,
> @@ -398,12 +386,6 @@ static struct platform_driver sta2x11_apb_soc_regs_platform_driver = {
>  	.probe		= sta2x11_apb_soc_regs_probe,
>  };
>  
> -static int __init sta2x11_apb_soc_regs_init(void)
> -{
> -	pr_info("%s\n", __func__);
> -	return platform_driver_register(&sta2x11_apb_soc_regs_platform_driver);
> -}
> -
>  static struct platform_driver sta2x11_scr_platform_driver = {
>  	.driver = {
>  		.name = STA2X11_MFD_SCR_NAME,
> @@ -411,13 +393,18 @@ static struct platform_driver sta2x11_scr_platform_driver = {
>  	.probe = sta2x11_scr_probe,
>  };
>  
> -static int __init sta2x11_scr_init(void)
> +static struct platform_driver * const drivers[] = {
> +	&sta2x11_platform_driver,
> +	&sta2x11_sctl_platform_driver,
> +	&sta2x11_apb_soc_regs_platform_driver,
> +	&sta2x11_scr_platform_driver,
> +};
> +
> +static int __init sta2x11_drivers_init(void)
>  {
> -	pr_info("%s\n", __func__);
> -	return platform_driver_register(&sta2x11_scr_platform_driver);
> +	return platform_register_drivers(drivers, ARRAY_SIZE(drivers));
>  }
>  
> -
>  /*
>   * What follows are the PCI devices that host the above pdevs.
>   * Each logic block is 4kB and they are all consecutive: we use this info.
> @@ -664,10 +651,7 @@ static int __init sta2x11_mfd_init(void)
>   * prepares platform drivers very early and probe the PCI device later,
>   * but before other PCI devices.
>   */
> -subsys_initcall(sta2x11_apbreg_init);
> -subsys_initcall(sta2x11_sctl_init);
> -subsys_initcall(sta2x11_apb_soc_regs_init);
> -subsys_initcall(sta2x11_scr_init);
> +subsys_initcall(sta2x11_drivers_init);
>  rootfs_initcall(sta2x11_mfd_init);
>  
>  MODULE_LICENSE("GPL v2");

-- 
Lee Jones
Linaro STMicroelectronics Landing Team Lead
Linaro.org â Open source software for ARM SoCs
Follow Linaro: Facebook | Twitter | Blog