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Date:	Tue, 6 Oct 2015 13:33:22 -0500
From:	Suman Anna <s-anna@...com>
To:	"Balbi, Felipe" <balbi@...com>, Tony Lindgren <tony@...mide.com>
CC:	Linux OMAP Mailing List <linux-omap@...r.kernel.org>,
	Linux ARM Kernel Mailing List 
	<linux-arm-kernel@...ts.infradead.org>,
	"tglx@...utronix.de" <tglx@...utronix.de>,
	"daniel.lezcano@...aro.org" <daniel.lezcano@...aro.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 04/11] arm: omap2: timer: provide generic
 sync32k_timer_init function

On 10/06/2015 12:02 PM, Balbi, Felipe wrote:
> instead of constantly defining a small wrapper
> around __omap_sync32k_timer_init(), let's define
> a generic one which can be used by all OMAPs.
> 
> Signed-off-by: Felipe Balbi <balbi@...com>
> ---
>  arch/arm/mach-omap2/board-generic.c | 10 +++++-----
>  arch/arm/mach-omap2/board-ldp.c     |  2 +-
>  arch/arm/mach-omap2/board-rx51.c    |  2 +-
>  arch/arm/mach-omap2/common.h        |  3 +--
>  arch/arm/mach-omap2/timer.c         | 20 +++-----------------
>  5 files changed, 11 insertions(+), 26 deletions(-)
> 
> diff --git a/arch/arm/mach-omap2/board-generic.c b/arch/arm/mach-omap2/board-generic.c
> index 9df14ed7dab1..871db0f0fa66 100644
> --- a/arch/arm/mach-omap2/board-generic.c
> +++ b/arch/arm/mach-omap2/board-generic.c
> @@ -46,7 +46,7 @@ DT_MACHINE_START(OMAP242X_DT, "Generic OMAP2420 (Flattened Device Tree)")
>  	.map_io		= omap242x_map_io,
>  	.init_early	= omap2420_init_early,
>  	.init_machine	= omap_generic_init,
> -	.init_time	= omap2_sync32k_timer_init,
> +	.init_time	= omap_sync32k_timer_init,
>  	.dt_compat	= omap242x_boards_compat,
>  	.restart	= omap2xxx_restart,
>  MACHINE_END
> @@ -63,7 +63,7 @@ DT_MACHINE_START(OMAP243X_DT, "Generic OMAP2430 (Flattened Device Tree)")
>  	.map_io		= omap243x_map_io,
>  	.init_early	= omap2430_init_early,
>  	.init_machine	= omap_generic_init,
> -	.init_time	= omap2_sync32k_timer_init,
> +	.init_time	= omap_sync32k_timer_init,
>  	.dt_compat	= omap243x_boards_compat,
>  	.restart	= omap2xxx_restart,
>  MACHINE_END
> @@ -82,7 +82,7 @@ DT_MACHINE_START(OMAP3_N900_DT, "Nokia RX-51 board")
>  	.init_early	= omap3430_init_early,
>  	.init_machine	= omap_generic_init,
>  	.init_late	= omap3_init_late,
> -	.init_time	= omap3_sync32k_timer_init,
> +	.init_time	= omap_sync32k_timer_init,
>  	.dt_compat	= n900_boards_compat,
>  	.restart	= omap3xxx_restart,
>  MACHINE_END
> @@ -100,7 +100,7 @@ DT_MACHINE_START(OMAP3_DT, "Generic OMAP3 (Flattened Device Tree)")
>  	.init_early	= omap3430_init_early,
>  	.init_machine	= omap_generic_init,
>  	.init_late	= omap3_init_late,
> -	.init_time	= omap3_sync32k_timer_init,
> +	.init_time	= omap_sync32k_timer_init,
>  	.dt_compat	= omap3_boards_compat,
>  	.restart	= omap3xxx_restart,
>  MACHINE_END
> @@ -116,7 +116,7 @@ DT_MACHINE_START(OMAP36XX_DT, "Generic OMAP36xx (Flattened Device Tree)")
>  	.init_early	= omap3630_init_early,
>  	.init_machine	= omap_generic_init,
>  	.init_late	= omap3_init_late,
> -	.init_time	= omap3_sync32k_timer_init,
> +	.init_time	= omap_sync32k_timer_init,
>  	.dt_compat	= omap36xx_boards_compat,
>  	.restart	= omap3xxx_restart,
>  MACHINE_END
> diff --git a/arch/arm/mach-omap2/board-ldp.c b/arch/arm/mach-omap2/board-ldp.c
> index c2975af4cd5d..0d3a57c6931f 100644
> --- a/arch/arm/mach-omap2/board-ldp.c
> +++ b/arch/arm/mach-omap2/board-ldp.c
> @@ -424,6 +424,6 @@ MACHINE_START(OMAP_LDP, "OMAP LDP board")
>  	.init_irq	= omap3_init_irq,
>  	.init_machine	= omap_ldp_init,
>  	.init_late	= omap3430_init_late,
> -	.init_time	= omap3_sync32k_timer_init,
> +	.init_time	= omap_sync32k_timer_init,
>  	.restart	= omap3xxx_restart,
>  MACHINE_END
> diff --git a/arch/arm/mach-omap2/board-rx51.c b/arch/arm/mach-omap2/board-rx51.c
> index 2d1e5a6beb85..830256c434ec 100644
> --- a/arch/arm/mach-omap2/board-rx51.c
> +++ b/arch/arm/mach-omap2/board-rx51.c
> @@ -136,6 +136,6 @@ MACHINE_START(NOKIA_RX51, "Nokia RX-51 board")
>  	.init_irq	= omap3_init_irq,
>  	.init_machine	= rx51_init,
>  	.init_late	= omap3430_init_late,
> -	.init_time	= omap3_sync32k_timer_init,
> +	.init_time	= omap_sync32k_timer_init,
>  	.restart	= omap3xxx_restart,
>  MACHINE_END
> diff --git a/arch/arm/mach-omap2/common.h b/arch/arm/mach-omap2/common.h
> index 92e92cfc2775..844ad031f7f0 100644
> --- a/arch/arm/mach-omap2/common.h
> +++ b/arch/arm/mach-omap2/common.h
> @@ -88,8 +88,7 @@ static inline int omap_mux_late_init(void)
>  
>  extern void omap2_init_common_infrastructure(void);
>  
> -extern void omap2_sync32k_timer_init(void);
> -extern void omap3_sync32k_timer_init(void);
> +extern void omap_sync32k_timer_init(void);
>  extern void omap3_secure_sync32k_timer_init(void);
>  extern void omap3_gptimer_timer_init(void);
>  extern void omap4_local_timer_init(void);
> diff --git a/arch/arm/mach-omap2/timer.c b/arch/arm/mach-omap2/timer.c
> index 976ff9fa3594..d14e25b2d7a4 100644
> --- a/arch/arm/mach-omap2/timer.c
> +++ b/arch/arm/mach-omap2/timer.c
> @@ -608,21 +608,13 @@ static void __init __omap_sync32k_timer_init(int clkev_nr, const char *clkev_src
>  		omap2_sync32k_clocksource_init();
>  }
>  
> -#ifdef CONFIG_ARCH_OMAP2
> -void __init omap2_sync32k_timer_init(void)
> +void __init omap_sync32k_timer_init(void)
>  {
>  	__omap_sync32k_timer_init(1, "timer_32k_ck", "ti,timer-alwon",
>  			2, "timer_sys_ck", NULL, false);
>  }
> -#endif /* CONFIG_ARCH_OMAP2 */
>  
>  #if defined(CONFIG_ARCH_OMAP3) || defined(CONFIG_SOC_AM43XX)
> -void __init omap3_sync32k_timer_init(void)
> -{
> -	__omap_sync32k_timer_init(1, "timer_32k_ck", "ti,timer-alwon",
> -			2, "timer_sys_ck", NULL, false);
> -}
> -
>  void __init omap3_secure_sync32k_timer_init(void)
>  {
>  	__omap_sync32k_timer_init(12, "secure_32k_fck", "ti,timer-secure",
> @@ -640,15 +632,9 @@ void __init omap3_gptimer_timer_init(void)
>  
>  #if defined(CONFIG_ARCH_OMAP4) || defined(CONFIG_SOC_OMAP5) || \
>  	defined(CONFIG_SOC_DRA7XX) || defined(CONFIG_SOC_AM43XX)
> -static void __init omap4_sync32k_timer_init(void)
> -{
> -	__omap_sync32k_timer_init(1, "timer_32k_ck", "ti,timer-alwon",
> -			2, "sys_clkin_ck", NULL, false);
> -}
> -
>  void __init omap4_local_timer_init(void)
>  {
> -	omap4_sync32k_timer_init();
> +	omap_sync32k_timer_init();

Hmm, this is changing the parent clock source for the timer from
sys_clkin_ck to timer_sys_ck for OMAP4 and OMAP5 below. I am not sure of
the history behind the parent source, but is this what you intended to
do here.

regards
Suman

>  	clocksource_of_init();
>  }
>  #endif
> @@ -656,7 +642,7 @@ void __init omap4_local_timer_init(void)
>  #if defined(CONFIG_SOC_OMAP5) || defined(CONFIG_SOC_DRA7XX)
>  void __init omap5_realtime_timer_init(void)
>  {
> -	omap4_sync32k_timer_init();
> +	omap_sync32k_timer_init();
>  	realtime_counter_init();
>  
>  	clocksource_of_init();
> 

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