linux-kernel - Re: [PATCH v3 04/11] ARM: davinci: da850: switch to using the clocksource driver

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Date:   Tue, 12 Mar 2019 13:36:36 -0500
From:   David Lechner <david@...hnology.com>
To:     Bartosz Golaszewski <brgl@...ev.pl>, Sekhar Nori <nsekhar@...com>,
        Kevin Hilman <khilman@...nel.org>,
        Daniel Lezcano <daniel.lezcano@...aro.org>,
        Thomas Gleixner <tglx@...utronix.de>
Cc:     linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        devicetree@...r.kernel.org,
        Bartosz Golaszewski <bgolaszewski@...libre.com>
Subject: Re: [PATCH v3 04/11] ARM: davinci: da850: switch to using the
 clocksource driver

On 2/26/19 6:06 AM, Bartosz Golaszewski wrote:
> From: Bartosz Golaszewski <bgolaszewski@...libre.com>
> 
> We now have a proper clocksource driver for davinci. Switch the da850
> platform to using it.
> 
> Signed-off-by: Bartosz Golaszewski <bgolaszewski@...libre.com>
> ---

Reviewed-by: David Lechner <david@...hnology.com>

>   arch/arm/mach-davinci/da850.c | 41 ++++++++++-------------------------
>   1 file changed, 11 insertions(+), 30 deletions(-)
> 
> diff --git a/arch/arm/mach-davinci/da850.c b/arch/arm/mach-davinci/da850.c
> index 72d64d39d42a..5ce58ae0d764 100644
> --- a/arch/arm/mach-davinci/da850.c
> +++ b/arch/arm/mach-davinci/da850.c
> @@ -34,7 +34,8 @@
>   #include <mach/cputype.h>
>   #include <mach/da8xx.h>
>   #include <mach/pm.h>
> -#include <mach/time.h>
> +
> +#include <clocksource/timer-davinci.h>
>   
>   #include "irqs.h"
>   #include "mux.h"
> @@ -332,38 +333,17 @@ static struct davinci_id da850_ids[] = {
>   	},
>   };
>   
> -static struct davinci_timer_instance da850_timer_instance[4] = {
> -	{
> -		.base		= DA8XX_TIMER64P0_BASE,
> -		.bottom_irq	= DAVINCI_INTC_IRQ(IRQ_DA8XX_TINT12_0),
> -		.top_irq	= DAVINCI_INTC_IRQ(IRQ_DA8XX_TINT34_0),
> -	},
> -	{
> -		.base		= DA8XX_TIMER64P1_BASE,
> -		.bottom_irq	= DAVINCI_INTC_IRQ(IRQ_DA8XX_TINT12_1),
> -		.top_irq	= DAVINCI_INTC_IRQ(IRQ_DA8XX_TINT34_1),
> -	},
> -	{
> -		.base		= DA850_TIMER64P2_BASE,
> -		.bottom_irq	= DAVINCI_INTC_IRQ(IRQ_DA850_TINT12_2),
> -		.top_irq	= DAVINCI_INTC_IRQ(IRQ_DA850_TINT34_2),
> -	},
> -	{
> -		.base		= DA850_TIMER64P3_BASE,
> -		.bottom_irq	= DAVINCI_INTC_IRQ(IRQ_DA850_TINT12_3),
> -		.top_irq	= DAVINCI_INTC_IRQ(IRQ_DA850_TINT34_3),
> -	},
> -};
> -
>   /*
>    * T0_BOT: Timer 0, bottom		: Used for clock_event
>    * T0_TOP: Timer 0, top			: Used for clocksource
>    * T1_BOT, T1_TOP: Timer 1, bottom & top: Used for watchdog timer

It looks like we could drop the mention of the watchdog timer here.
And T0_BOT/T0_TOP don't really have a meaning anymore.

>    */
> -static struct davinci_timer_info da850_timer_info = {
> -	.timers		= da850_timer_instance,
> -	.clockevent_id	= T0_BOT,
> -	.clocksource_id	= T0_TOP,
> +static const struct davinci_timer_cfg da850_timer_cfg = {
> +	.reg = DEFINE_RES_IO(DA8XX_TIMER64P0_BASE, SZ_4K),
> +	.irq = {
> +		DEFINE_RES_IRQ(DAVINCI_INTC_IRQ(IRQ_DA8XX_TINT12_0)),
> +		DEFINE_RES_IRQ(DAVINCI_INTC_IRQ(IRQ_DA8XX_TINT34_0)),
> +	},
>   };