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ACPI: throttle: Change internal APIs better handle _PTC 

Change the function interface for throttling control via PTC.
The following functions are concerned:

acpi_read_throttling_status()
acpi_write_throttling_state()
acpi_get_throttling_value()
acpi_get_throttling_state()

Signed-off-by: Zhao Yakui <yakui.zhao@intel.com>
Signed-off-by: Li Shaohua <shaohua.li@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
This commit is contained in:
Zhao Yakui 2007-11-15 17:03:46 +08:00 committed by Len Brown
parent 22cc50199d
commit 0753f6e0a3
1 changed files with 39 additions and 21 deletions
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60
drivers/acpi/processor_throttling.c
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@ -376,16 +376,23 @@ static int acpi_processor_get_throttling_fadt(struct acpi_processor *pr)
return 0;
}
static int acpi_read_throttling_status(struct acpi_processor_throttling
*throttling)
static int acpi_read_throttling_status(struct acpi_processor *pr,
acpi_integer *value)
{
int value = -1;
u64 ptc_value;
struct acpi_processor_throttling *throttling;
int ret = -1;
throttling = &pr->throttling;
switch (throttling->status_register.space_id) {
case ACPI_ADR_SPACE_SYSTEM_IO:
ptc_value = 0;
acpi_os_read_port((acpi_io_address) throttling->status_register.
address, &value,
address, (u32 *) &ptc_value,
(u32) throttling->status_register.bit_width *
8);
*value = (acpi_integer) ptc_value;
ret = 0;
break;
case ACPI_ADR_SPACE_FIXED_HARDWARE:
printk(KERN_ERR PREFIX
@ -395,18 +402,22 @@ static int acpi_read_throttling_status(struct acpi_processor_throttling
printk(KERN_ERR PREFIX "Unknown addr space %d\n",
(u32) (throttling->status_register.space_id));
}
return value;
return ret;
}
static int acpi_write_throttling_state(struct acpi_processor_throttling
*throttling, int value)
static int acpi_write_throttling_state(struct acpi_processor *pr,
acpi_integer value)
{
u64 ptc_value;
struct acpi_processor_throttling *throttling;
int ret = -1;
throttling = &pr->throttling;
switch (throttling->control_register.space_id) {
case ACPI_ADR_SPACE_SYSTEM_IO:
ptc_value = value;
acpi_os_write_port((acpi_io_address) throttling->
control_register.address, value,
control_register.address, (u32) ptc_value,
(u32) throttling->control_register.
bit_width * 8);
ret = 0;
@ -422,7 +433,8 @@ static int acpi_write_throttling_state(struct acpi_processor_throttling
return ret;
}
static int acpi_get_throttling_state(struct acpi_processor *pr, int value)
static int acpi_get_throttling_state(struct acpi_processor *pr,
acpi_integer value)
{
int i;
@ -438,22 +450,26 @@ static int acpi_get_throttling_state(struct acpi_processor *pr, int value)
return i;
}
static int acpi_get_throttling_value(struct acpi_processor *pr, int state)
static int acpi_get_throttling_value(struct acpi_processor *pr,
int state, acpi_integer *value)
{
int value = -1;
int ret = -1;
if (state >= 0 && state <= pr->throttling.state_count) {
struct acpi_processor_tx_tss *tx =
(struct acpi_processor_tx_tss *)&(pr->throttling.
states_tss[state]);
value = tx->control;
*value = tx->control;
ret = 0;
}
return value;
return ret;
}
static int acpi_processor_get_throttling_ptc(struct acpi_processor *pr)
{
int state = 0;
u32 value = 0;
int ret;
acpi_integer value;
if (!pr)
return -EINVAL;
@ -463,8 +479,9 @@ static int acpi_processor_get_throttling_ptc(struct acpi_processor *pr)
pr->throttling.state = 0;
local_irq_disable();
value = acpi_read_throttling_status(&pr->throttling);
if (value >= 0) {
value = 0;
ret = acpi_read_throttling_status(pr, &value);
if (ret >= 0) {
state = acpi_get_throttling_state(pr, value);
pr->throttling.state = state;
}
@ -588,7 +605,8 @@ static int acpi_processor_set_throttling_fadt(struct acpi_processor *pr,
static int acpi_processor_set_throttling_ptc(struct acpi_processor *pr,
int state)
{
u32 value = 0;
int ret;
acpi_integer value;
if (!pr)
return -EINVAL;
@ -606,10 +624,10 @@ static int acpi_processor_set_throttling_ptc(struct acpi_processor *pr,
return -EPERM;
local_irq_disable();
value = acpi_get_throttling_value(pr, state);
if (value >= 0) {
acpi_write_throttling_state(&pr->throttling, value);
value = 0;
ret = acpi_get_throttling_value(pr, state, &value);
if (ret >= 0) {
acpi_write_throttling_state(pr, value);
pr->throttling.state = state;
}
local_irq_enable();