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

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Message-ID: <20190415142223.GF3578@piout.net>
Date:   Mon, 15 Apr 2019 16:22:23 +0200
From:   Alexandre Belloni <alexandre.belloni@...tlin.com>
To:     Daniel Lezcano <daniel.lezcano@...aro.org>
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        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 11/04/2019 17:00:26+0200, Daniel Lezcano wrote:
> 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?
> 

I'm dropping this patch and the structures but doing the differentiation
with TIMER_OF_DECLARE is not possible as this has to match
"atmel,tcb-timer" and the differentiation is done on the parent
compatible.

> 
> 
> > 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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> 

-- 
Alexandre Belloni, Bootlin
Embedded Linux and Kernel engineering
https://bootlin.com