On Mon, 2007-03-19 at 17:30 +0800, Luming Yu wrote:
> adds _TPC support which support Throttling Present Capabilities
> change for ACPI processor driver
>
> signed-off-by: Luming Yu <Luming.yu@xxxxxxxxx>
> --
>
> drivers/acpi/processor_core.c | 4 ++++
> drivers/acpi/processor_throttling.c | 30
> ++++++++++++++++++++++++++++--
> include/acpi/processor.h | 3 +++
> 3 files changed, 35 insertions(+), 2 deletions(-)
>
>
> diff --git a/drivers/acpi/processor_core.c
> b/drivers/acpi/processor_core.c
> index ddc9e20..b2093ca 100644
> --- a/drivers/acpi/processor_core.c
> +++ b/drivers/acpi/processor_core.c
> @@ -67,6 +67,7 @@ #define ACPI_PROCESSOR_FILE_THROTTLING "
> #define ACPI_PROCESSOR_FILE_LIMIT "limit"
> #define ACPI_PROCESSOR_NOTIFY_PERFORMANCE 0x80
> #define ACPI_PROCESSOR_NOTIFY_POWER 0x81
> +#define ACPI_PROCESSOR_NOTIFY_THROTTLING 0x82
>
> #define ACPI_PROCESSOR_LIMIT_USER 0
> #define ACPI_PROCESSOR_LIMIT_THERMAL 1
> @@ -702,6 +703,9 @@ static void acpi_processor_notify(acpi_h
> acpi_processor_cst_has_changed(pr);
> acpi_bus_generate_event(device, event, 0);
> break;
> + case ACPI_PROCESSOR_NOTIFY_THROTTLING:
> + acpi_processor_tstate_has_changed(pr);
> + acpi_bus_generate_event(device, event, 0);
> default:
> ACPI_DEBUG_PRINT((ACPI_DB_INFO,
> "Unsupported event [0x%x]\n",
> event));
> diff --git a/drivers/acpi/processor_throttling.c
> b/drivers/acpi/processor_throttling.c
> index b334860..0528b27 100644
> --- a/drivers/acpi/processor_throttling.c
> +++ b/drivers/acpi/processor_throttling.c
> @@ -44,6 +44,27 @@ #define ACPI_PROCESSOR_CLASS
> #define _COMPONENT ACPI_PROCESSOR_COMPONENT
> ACPI_MODULE_NAME("processor_throttling");
>
> +static int acpi_processor_get_platform_limit(struct acpi_processor
> *pr)
> +{
> + acpi_status status = 0;
> + unsigned long tpc = 0;
> +
> + if(!pr)
> + return -EINVAL;
> + status = acpi_evaluate_integer(pr->handle, "_TPC", NULL,
> &tpc);
> + if(ACPI_FAILURE(status) && status != AE_NOT_FOUND){
> + ACPI_EXCEPTION((AE_INFO, status, "Evaluating _TPC"));
> + return -ENODEV;
> + }
> + pr->throttling_platform_limit = (int)tpc;
> + return 0;
> +}
I think we should reset throttling here, as limit is changed, previous
throttling setting might not be feasible.
Thanks,
Shaohua
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