[PATCH 13/25] OMAP4: PM: Add WakeupGen module as OMAP gic_arch_extn

[santosh.shilimkar@ti.com (Santosh)]

On Friday 09 September 2011 12:46 AM, Jean Pihet wrote:
> On Sun, Sep 4, 2011 at 3:54 PM, Santosh Shilimkar
> <santosh.shilimkar@ti.com>  wrote:
>> OMAP WakeupGen is the interrupt controller extension used along
>> with ARM GIC to wake the CPU out from low power states on
>> external interrupts.
>>
>> The WakeupGen unit is responsible for generating wakeup event
> ... for generating the wakeup events
>> from the incoming interrupts and enable bits. It is implemented
>> in MPU always ON power domain. During normal operation,
> in the MPU...
>> WakeupGen delivers external interrupts directly to the GIC.
> ... delivers the external interrupts
>
OK.

>> Signed-off-by: Santosh Shilimkar<santosh.shilimkar@ti.com>
>> Cc: Kevin Hilman<khilman@ti.com>
>> ---
>>   arch/arm/mach-omap2/Makefile                      |    2 +-
>>   arch/arm/mach-omap2/include/mach/omap-wakeupgen.h |   39 ++++
>>   arch/arm/mach-omap2/omap-wakeupgen.c              |  241 +++++++++++++++++++++
>>   arch/arm/mach-omap2/omap4-common.c                |    3 +
>>   4 files changed, 284 insertions(+), 1 deletions(-)
>>   create mode 100644 arch/arm/mach-omap2/include/mach/omap-wakeupgen.h
>>   create mode 100644 arch/arm/mach-omap2/omap-wakeupgen.c
>>
> ...
>
>> + */
>> +int __init omap_wakeupgen_init(void)
>> +{
>> +       int i;
>> +       unsigned int boot_cpu = smp_processor_id();
>> +
>> +       /* Not supported on OMAP4 ES1.0 silicon */
>> +       if (omap_rev() == OMAP4430_REV_ES1_0) {
>> +               WARN(1, "WakeupGen: Not supported on OMAP4430 ES1.0\n");
>> +               return -EPERM;
>> +       }
>> +
>> +       /* Static mapping, never released */
>> +       wakeupgen_base = ioremap(OMAP44XX_WKUPGEN_BASE, SZ_4K);
>> +       if (WARN_ON(!wakeupgen_base))
>> +               return -ENODEV;
> -ENOMEM os required as discussed in the other patches of the series.
>
Yep.