Re: [PATCH/RFC] ARM: OMAP2: PRCM: more init, and clear wakeup events.

[Tony Lindgren <tony@atomide.com>]

* Kevin Hilman <khilman@mvista.com> [071101 16:13]:
> More initialization of wake dependencies.
> Clear PRCM wake-up events after coming out of full-retention.
> 
> Signed-off-by: Kevin Hilman <khilman@mvista.com>
> 
> ---
>  arch/arm/mach-omap2/pm.c |   23 ++++++++++++++++++++++-
>  1 file changed, 22 insertions(+), 1 deletion(-)
> 
> Index: dev/arch/arm/mach-omap2/pm.c
> ===================================================================
> --- dev.orig/arch/arm/mach-omap2/pm.c
> +++ dev/arch/arm/mach-omap2/pm.c
> @@ -397,7 +397,7 @@ void omap2_allow_sleep(void)
>  
>  static void omap2_enter_full_retention(void)
>  {
> -	u32 sleep_time = 0;
> +	u32 l, sleep_time = 0;
>  
>  	/* There is 1 reference hold for all children of the oscillator
>  	 * clock, the following will remove it. If no one else uses the
> @@ -450,6 +450,24 @@ no_sleep:
>  
>  	clk_enable(osc_ck);
>  
> +	/* clear CORE wake-up events */
> +	prm_write_mod_reg(0xffffffff, CORE_MOD, PM_WKST1);
> +	prm_write_mod_reg(0xffffffff, CORE_MOD, OMAP24XX_PM_WKST2);
> +
> +	/* wakeup domain events */
> +	l = prm_read_mod_reg(WKUP_MOD, PM_WKST);
> +	l &= 0x5;  /* bit 1: GPT1, bit5 GPIO */
> +	prm_write_mod_reg(l, WKUP_MOD, PM_WKST);
> +
> +	/* MPU domain wake events */
> +	l = prm_read_reg(OMAP24XX_PRCM_IRQSTATUS_MPU);
> +	if (l & 0x01)
> +		prm_write_reg(0x01, OMAP24XX_PRCM_IRQSTATUS_MPU);
> +	if (l & 0x20)
> +		prm_write_reg(0x20, OMAP24XX_PRCM_IRQSTATUS_MPU);
> +
> +	/* Mask future PRCM-to-MPU interrupts */
> +	prm_write_reg(0x0, OMAP24XX_PRCM_IRQSTATUS_MPU);
>  }
>  
>  static int omap2_i2c_active(void)
> @@ -654,6 +672,9 @@ static void __init prcm_setup_regs(void)
>  	prm_write_mod_reg(OMAP_EN_WKUP, MPU_MOD, PM_WKDEP);
>  	prm_write_mod_reg(0, OMAP24XX_DSP_MOD, PM_WKDEP);
>  	prm_write_mod_reg(0, GFX_MOD, PM_WKDEP);
> +	prm_write_mod_reg(0, CORE_MOD, PM_WKDEP);
> +	if (cpu_is_omap2430())
> +		prm_write_mod_reg(0, OMAP2430_MDM_MOD, PM_WKDEP);
>  
>  	l = prm_read_mod_reg(CORE_MOD, PM_PWSTCTRL);
>  	/* Enable retention for all memory blocks */
> --

Pushing today.

Tony