linux-kernel - Re: [PATCH] clocksource/drivers/fttmr010: Fix aspeed-2500 initialization

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Date:   Mon, 29 May 2017 15:35:51 +0930
From:   Andrew Jeffery <andrew@...id.au>
To:     Daniel Lezcano <daniel.lezcano@...aro.org>
Cc:     joel@....id.au, ryan_chen@...eedtech.com, mark.rutland@....com,
        linus.walleij@...aro.org, jonas.jensen@...il.com,
        Thomas Gleixner <tglx@...utronix.de>,
        "open list:CLOCKSOURCE, CLOCKEVENT DRIVERS" 
        <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] clocksource/drivers/fttmr010: Fix aspeed-2500
 initialization

On Fri, 2017-05-26 at 10:48 +0200, Daniel Lezcano wrote:
> The recent changes made the fttmr010 to be more generic and support different
> timers with a very few differences like moxart or aspeed.
> 
> The aspeed timer uses a countdown and there is a test against the aspeed2400
> compatible string to set a flag.
> 
> With the previous patch, we added the aspeed2500 compatible string but without
> taking care of setting the countdown flag.
> 
> Fix this by specifiying a init function and pass the aspeed flag to a common
> init function.
> 
> Signed-off-by: Daniel Lezcano <daniel.lezcano@...aro.org>

Tested-by: Andrew Jeffery <andrew@...id.au>
Reviewed-by: Andrew Jeffery <andrew@...id.au>

> ---
>  drivers/clocksource/timer-fttmr010.c | 23 ++++++++++++++++-------
>  1 file changed, 16 insertions(+), 7 deletions(-)
> 
> diff --git a/drivers/clocksource/timer-fttmr010.c b/drivers/clocksource/timer-fttmr010.c
> index 68982ad..d96190e 100644
> --- a/drivers/clocksource/timer-fttmr010.c
> +++ b/drivers/clocksource/timer-fttmr010.c
> @@ -210,10 +210,9 @@ static irqreturn_t fttmr010_timer_interrupt(int irq, void *dev_id)
> >  	return IRQ_HANDLED;
>  }
>  
> -static int __init fttmr010_timer_init(struct device_node *np)
> +static int __init fttmr010_common_init(struct device_node *np, bool is_aspeed)
>  {
> >  	struct fttmr010 *fttmr010;
> > -	bool is_ast2400;
> >  	int irq;
> >  	struct clk *clk;
> >  	int ret;
> @@ -260,8 +259,7 @@ static int __init fttmr010_timer_init(struct device_node *np)
> >  	 * The Aspeed AST2400 moves bits around in the control register,
> >  	 * otherwise it works the same.
> >  	 */
> > -	is_ast2400 = of_device_is_compatible(np, "aspeed,ast2400-timer");
> > -	if (is_ast2400) {
> > +	if (is_aspeed) {
> >  		fttmr010->t1_enable_val = TIMER_1_CR_ASPEED_ENABLE |
> >  			TIMER_1_CR_ASPEED_INT;
> >  		/* Downward not available */
> @@ -280,7 +278,7 @@ static int __init fttmr010_timer_init(struct device_node *np)
> >  	 * Enable timer 1 count up, timer 2 count up, except on Aspeed,
> >  	 * where everything just counts down.
> >  	 */
> > -	if (is_ast2400)
> > +	if (is_aspeed)
> >  		val = TIMER_2_CR_ASPEED_ENABLE;
> >  	else {
> >  		val = TIMER_2_CR_ENABLE;
> @@ -355,8 +353,19 @@ static int __init fttmr010_timer_init(struct device_node *np)
>  
> >  	return ret;
>  }
> +
> +static __init int aspeed_timer_init(struct device_node *np)
> +{
> > +	return fttmr010_common_init(np, true);
> +}
> +
> +static __init int fttmr010_timer_init(struct device_node *np)
> +{
> > +	return fttmr010_common_init(np, false);
> +}
> +
>  CLOCKSOURCE_OF_DECLARE(fttmr010, "faraday,fttmr010", fttmr010_timer_init);
>  CLOCKSOURCE_OF_DECLARE(gemini, "cortina,gemini-timer", fttmr010_timer_init);
>  CLOCKSOURCE_OF_DECLARE(moxart, "moxa,moxart-timer", fttmr010_timer_init);
> -CLOCKSOURCE_OF_DECLARE(ast2400, "aspeed,ast2400-timer", fttmr010_timer_init);
> -CLOCKSOURCE_OF_DECLARE(ast2500, "aspeed,ast2500-timer", fttmr010_timer_init);
> +CLOCKSOURCE_OF_DECLARE(ast2400, "aspeed,ast2400-timer", aspeed_timer_init);
> +CLOCKSOURCE_OF_DECLARE(ast2500, "aspeed,ast2500-timer", aspeed_timer_init);
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