linux-kernel - Re: [PATCH 03/12] misc: atmel_tclib: move definitions to header file

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Date:   Thu, 11 Apr 2019 17:00:26 +0200
From:   Daniel Lezcano <daniel.lezcano@...aro.org>
To:     Alexandre Belloni <alexandre.belloni@...tlin.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:     Thomas Gleixner <tglx@...utronix.de>,
        Arnd Bergmann <arnd@...db.de>,
        Nicolas Ferre <nicolas.ferre@...rochip.com>,
        Alexander Dahl <ada@...rsis.com>,
        Sebastian Andrzej Siewior <bigeasy@...utronix.de>,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        linux-pwm@...r.kernel.org
Subject: Re: [PATCH 03/12] misc: atmel_tclib: move definitions to header file

On 03/04/2019 16:11, Alexandre Belloni wrote:
> Move atmel_tc_divisors and atmel_tcb_dt_ids definitions to the header file
> so they can be used without using tclib.

Why not kill those structure and use the TIMER_OF_DECLARE with the
corresponding probe function which will initialize to 16 or 32 counter
width?



> Signed-off-by: Alexandre Belloni <alexandre.belloni@...tlin.com>
> ---
>  drivers/misc/atmel_tclib.c   | 24 ------------------------
>  include/soc/at91/atmel_tcb.h | 21 ++++++++++++++++++++-
>  2 files changed, 20 insertions(+), 25 deletions(-)
> 
> diff --git a/drivers/misc/atmel_tclib.c b/drivers/misc/atmel_tclib.c
> index 3af27ce7e514..c79190525862 100644
> --- a/drivers/misc/atmel_tclib.c
> +++ b/drivers/misc/atmel_tclib.c
> @@ -17,10 +17,6 @@
>   * share individual timers between different drivers.
>   */
>  
> -/* AT91 has these divide MCK */
> -const u8 atmel_tc_divisors[5] = { 2, 8, 32, 128, 0, };
> -EXPORT_SYMBOL(atmel_tc_divisors);
> -
>  static DEFINE_SPINLOCK(tc_list_lock);
>  static LIST_HEAD(tc_list);
>  
> @@ -72,26 +68,6 @@ void atmel_tc_free(struct atmel_tc *tc)
>  EXPORT_SYMBOL_GPL(atmel_tc_free);
>  
>  #if defined(CONFIG_OF)
> -static struct atmel_tcb_config tcb_rm9200_config = {
> -	.counter_width = 16,
> -};
> -
> -static struct atmel_tcb_config tcb_sam9x5_config = {
> -	.counter_width = 32,
> -};
> -
> -static const struct of_device_id atmel_tcb_dt_ids[] = {
> -	{
> -		.compatible = "atmel,at91rm9200-tcb",
> -		.data = &tcb_rm9200_config,
> -	}, {
> -		.compatible = "atmel,at91sam9x5-tcb",
> -		.data = &tcb_sam9x5_config,
> -	}, {
> -		/* sentinel */
> -	}
> -};
> -
>  MODULE_DEVICE_TABLE(of, atmel_tcb_dt_ids);
>  #endif
>  
> diff --git a/include/soc/at91/atmel_tcb.h b/include/soc/at91/atmel_tcb.h
> index c3c7200ce151..cb0c5f53cd46 100644
> --- a/include/soc/at91/atmel_tcb.h
> +++ b/include/soc/at91/atmel_tcb.h
> @@ -76,8 +76,27 @@ extern struct atmel_tc *atmel_tc_alloc(unsigned block);
>  extern void atmel_tc_free(struct atmel_tc *tc);
>  
>  /* platform-specific ATMEL_TC_TIMER_CLOCKx divisors (0 means 32KiHz) */
> -extern const u8 atmel_tc_divisors[5];
> +static const u8 atmel_tc_divisors[] = { 2, 8, 32, 128, 0, };
>  
> +static const struct atmel_tcb_config tcb_rm9200_config = {
> +	.counter_width = 16,
> +};
> +
> +static const struct atmel_tcb_config tcb_sam9x5_config = {
> +	.counter_width = 32,
> +};
> +
> +static const struct of_device_id atmel_tcb_dt_ids[] = {
> +	{
> +		.compatible = "atmel,at91rm9200-tcb",
> +		.data = &tcb_rm9200_config,
> +	}, {
> +		.compatible = "atmel,at91sam9x5-tcb",
> +		.data = &tcb_sam9x5_config,
> +	}, {
> +		/* sentinel */
> +	}
> +};
>  
>  /*
>   * Two registers have block-wide controls.  These are: configuring the three
> 


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