Subject: ACPI : Change the function interface for throttling control via PTC
>From : Zhao Yakui <yakui.zhao@xxxxxxxxx>
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@xxxxxxxxx>
Signed-off-by: Li Shaohua <shaohua.li@xxxxxxxxx>
---
drivers/acpi/processor_throttling.c | 60 +++++++++++++++++++++++-------------
1 file changed, 39 insertions(+), 21 deletions(-)
Index: linux-2.6.24-rc1/drivers/acpi/processor_throttling.c
===================================================================
--- linux-2.6.24-rc1.orig/drivers/acpi/processor_throttling.c
+++ linux-2.6.24-rc1/drivers/acpi/processor_throttling.c
@@ -376,16 +376,23 @@ static int acpi_processor_get_throttling
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(s
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(s
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(str
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
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
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
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();
-
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