Hi,
Few minor comments below.
* Afzal Mohammed <afzal@xxxxxx> [130905 04:03]:
> AM43x has 224 interrupts and 7 banks, make it as maximum values. Keep
> default values as earlier, if am43x is detected, update interrupts and
> banks to maximum.
>
> Also AM43x has only one cpu, ensure that clearing bitmask at wakeupgen
> is done only for the single existing cpu, existing code assumes that
> there are two cpu's.
>
> If bitmask is cleared in wakeupgen for the nonexistent second cpu,
> an imprecise abort happens as soon as Kernel switches to user space.
> It was rootcaused by Sekhar Nori <nsekhar@xxxxxx>.
>
> Signed-off-by: Afzal Mohammed <afzal@xxxxxx>
> ---
> arch/arm/mach-omap2/omap-wakeupgen.c | 18 +++++++++++++-----
> 1 file changed, 13 insertions(+), 5 deletions(-)
>
> diff --git a/arch/arm/mach-omap2/omap-wakeupgen.c b/arch/arm/mach-omap2/omap-wakeupgen.c
> index 813c615..899d4946 100644
> --- a/arch/arm/mach-omap2/omap-wakeupgen.c
> +++ b/arch/arm/mach-omap2/omap-wakeupgen.c
> @@ -33,8 +33,11 @@
> #include "omap4-sar-layout.h"
> #include "common.h"
>
> -#define MAX_NR_REG_BANKS 5
> -#define MAX_IRQS 160
> +/* maximum value correspond to that of AM43x */
> +#define MAX_NR_REG_BANKS 7
> +#define MAX_IRQS 224
> +#define DEFAULT_NR_REG_BANKS 5
> +#define DEFAULT_IRQS 160
> #define WKG_MASK_ALL 0x00000000
> #define WKG_UNMASK_ALL 0xffffffff
> #define CPU_ENA_OFFSET 0x400
How about define it like this to avoid updating things
in multiple places for new SoCs:
#define AM43X_NR_REG_BANKS 7
#define MAX_NR_REG_BANKS AM43X_NR_REG_BANKS
...
> @@ -402,6 +405,7 @@ int __init omap_wakeupgen_init(void)
> {
> int i;
> unsigned int boot_cpu = smp_processor_id();
> + bool am43x = soc_is_am43xx() ? true : false;
>
> /* Not supported on OMAP4 ES1.0 silicon */
> if (omap_rev() == OMAP4430_REV_ES1_0) {
> @@ -418,12 +422,16 @@ int __init omap_wakeupgen_init(void)
> irq_banks = OMAP4_NR_BANKS;
> max_irqs = OMAP4_NR_IRQS;
> omap_secure_apis = 1;
> + } else if (am43x) {
> + irq_banks = MAX_NR_REG_BANKS;
> + max_irqs = MAX_IRQS;
> }
Then here you can have:
irq_bankse = AM43X_NR_REG_BANKS
...
> /* Clear all IRQ bitmasks at wakeupGen level */
> for (i = 0; i < irq_banks; i++) {
> wakeupgen_writel(0, i, CPU0_ID);
> - wakeupgen_writel(0, i, CPU1_ID);
> + if (!am43x)
> + wakeupgen_writel(0, i, CPU1_ID);
> }
Why not use soc_is_am43xx() directly here?
Regards,
Tony
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