[U-Boot] [PATCH] mxs: timrot: Add support to i.MX23

[Marek Vasut]

Dear Fadil Berisha,

> From: Fadil Berisha <f.koliqi at gmail.com>
> 
> This patch add timer support to i.MX23 and complete bit fields and values
> on regs-timrot.h.
> Testet on imx23-olinuxino board.
> 
> Signed-off-by: Fadil Berisha <f.koliqi at gmail.com>

Please always CC me, Fabio, Stefano on the MXS patches.

> ---
>  arch/arm/cpu/arm926ejs/mxs/timer.c          |   19 +++++-
>  arch/arm/include/asm/arch-mxs/regs-timrot.h |   91
> +++++++++++++++++++++++++++ 2 files changed, 108 insertions(+), 2
> deletions(-)
> 
> diff --git a/arch/arm/cpu/arm926ejs/mxs/timer.c
> b/arch/arm/cpu/arm926ejs/mxs/timer.c index 4ed75e6..a99b122 100644
> --- a/arch/arm/cpu/arm926ejs/mxs/timer.c
> +++ b/arch/arm/cpu/arm926ejs/mxs/timer.c
> @@ -32,7 +32,11 @@
>  #include <asm/arch/sys_proto.h>
> 
>  /* Maximum fixed count */
> -#define TIMER_LOAD_VAL	0xffffffff
> +#if defined(CONFIG_MX23)
> +#define TIMER_LOAD_VAL 0xffff
> +#elif defined(CONFIG_MX28)
> +#define TIMER_LOAD_VAL 0xffffffff
> +#endif
> 
>  DECLARE_GLOBAL_DATA_PTR;
> 
> @@ -77,7 +81,11 @@ int timer_init(void)
>  		&timrot_regs->hw_timrot_timctrl0);
> 
>  	/* Set fixed_count to maximal value */
> +#if defined(CONFIG_MX23)
> +	writel(TIMER_LOAD_VAL-1, HW_TIMROT_TIMCOUNT0);

NAK, this cannot work. Fix timrot_regs in regs-timrot.h

> +#elif defined(CONFIG_MX28)
>  	writel(TIMER_LOAD_VAL, &timrot_regs->hw_timrot_fixed_count0);
> +#endif
> 
>  	return 0;
>  }
> @@ -86,9 +94,16 @@ unsigned long long get_ticks(void)
>  {
>  	struct mxs_timrot_regs *timrot_regs =
>  		(struct mxs_timrot_regs *)MXS_TIMROT_BASE;
> +	uint32_t now;
> 
>  	/* Current tick value */
> -	uint32_t now = readl(&timrot_regs->hw_timrot_running_count0);
> +#if defined(CONFIG_MX23)
> +	/* upper bits are the valid */
> +	now = (readl(HW_TIMROT_TIMCOUNT0) >>
> +		TIMROT_RUNNING_COUNTn_RUNNING_COUNT_OFFSET);

The outer braces are superfluous.

> +#elif defined(CONFIG_MX28)
> +	now = readl(&timrot_regs->hw_timrot_running_count0);
> +#endif
> 
>  	if (lastdec >= now) {
>  		/*

[...]

> @@ -131,15 +160,29 @@ struct mxs_timrot_regs {
>  #define	TIMROT_TIMCTRLn_SELECT_4KHZ_XTAL		0xd
>  #define	TIMROT_TIMCTRLn_SELECT_1KHZ_XTAL		0xe
>  #define	TIMROT_TIMCTRLn_SELECT_TICK_ALWAYS		0xf
> +#endif
> 
> +#if defined(CONFIG_MX23)
> +#define 	HW_TIMROT_TIMCOUNT0 				0x80068030

Remove the above, use timrot_regs please.

> +#define	TIMROT_RUNNING_COUNTn_RUNNING_COUNT_MASK	(0xffff << 16)
> +#define	TIMROT_RUNNING_COUNTn_RUNNING_COUNT_OFFSET	16
> +#elif defined(CONFIG_MX28)
>  #define	TIMROT_RUNNING_COUNTn_RUNNING_COUNT_MASK	0xffffffff
>  #define	TIMROT_RUNNING_COUNTn_RUNNING_COUNT_OFFSET	0
> +#endif
[...]