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path: root/drivers/acpi/processor_throttling.c
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Diffstat (limited to 'drivers/acpi/processor_throttling.c')
-rw-r--r--drivers/acpi/processor_throttling.c133
1 files changed, 62 insertions, 71 deletions
diff --git a/drivers/acpi/processor_throttling.c b/drivers/acpi/processor_throttling.c
index be9f569d39d3..74a52d4e79ae 100644
--- a/drivers/acpi/processor_throttling.c
+++ b/drivers/acpi/processor_throttling.c
@@ -43,21 +43,17 @@
#define ACPI_PROCESSOR_CLASS "processor"
#define ACPI_PROCESSOR_DRIVER_NAME "ACPI Processor Driver"
#define _COMPONENT ACPI_PROCESSOR_COMPONENT
-ACPI_MODULE_NAME ("acpi_processor")
-
+ACPI_MODULE_NAME("acpi_processor")
/* --------------------------------------------------------------------------
Throttling Control
-------------------------------------------------------------------------- */
-
-static int
-acpi_processor_get_throttling (
- struct acpi_processor *pr)
+static int acpi_processor_get_throttling(struct acpi_processor *pr)
{
- int state = 0;
- u32 value = 0;
- u32 duty_mask = 0;
- u32 duty_value = 0;
+ int state = 0;
+ u32 value = 0;
+ u32 duty_mask = 0;
+ u32 duty_value = 0;
ACPI_FUNCTION_TRACE("acpi_processor_get_throttling");
@@ -86,7 +82,7 @@ acpi_processor_get_throttling (
duty_value >>= pr->throttling.duty_offset;
if (duty_value)
- state = pr->throttling.state_count-duty_value;
+ state = pr->throttling.state_count - duty_value;
}
pr->throttling.state = state;
@@ -94,20 +90,17 @@ acpi_processor_get_throttling (
local_irq_enable();
ACPI_DEBUG_PRINT((ACPI_DB_INFO,
- "Throttling state is T%d (%d%% throttling applied)\n",
- state, pr->throttling.states[state].performance));
+ "Throttling state is T%d (%d%% throttling applied)\n",
+ state, pr->throttling.states[state].performance));
return_VALUE(0);
}
-
-int acpi_processor_set_throttling (
- struct acpi_processor *pr,
- int state)
+int acpi_processor_set_throttling(struct acpi_processor *pr, int state)
{
- u32 value = 0;
- u32 duty_mask = 0;
- u32 duty_value = 0;
+ u32 value = 0;
+ u32 duty_mask = 0;
+ u32 duty_value = 0;
ACPI_FUNCTION_TRACE("acpi_processor_set_throttling");
@@ -168,28 +161,26 @@ int acpi_processor_set_throttling (
local_irq_enable();
ACPI_DEBUG_PRINT((ACPI_DB_INFO,
- "Throttling state set to T%d (%d%%)\n", state,
- (pr->throttling.states[state].performance?pr->throttling.states[state].performance/10:0)));
+ "Throttling state set to T%d (%d%%)\n", state,
+ (pr->throttling.states[state].performance ? pr->
+ throttling.states[state].performance / 10 : 0)));
return_VALUE(0);
}
-
-int
-acpi_processor_get_throttling_info (
- struct acpi_processor *pr)
+int acpi_processor_get_throttling_info(struct acpi_processor *pr)
{
- int result = 0;
- int step = 0;
- int i = 0;
+ int result = 0;
+ int step = 0;
+ int i = 0;
ACPI_FUNCTION_TRACE("acpi_processor_get_throttling_info");
ACPI_DEBUG_PRINT((ACPI_DB_INFO,
- "pblk_address[0x%08x] duty_offset[%d] duty_width[%d]\n",
- pr->throttling.address,
- pr->throttling.duty_offset,
- pr->throttling.duty_width));
+ "pblk_address[0x%08x] duty_offset[%d] duty_width[%d]\n",
+ pr->throttling.address,
+ pr->throttling.duty_offset,
+ pr->throttling.duty_width));
if (!pr)
return_VALUE(-EINVAL);
@@ -199,14 +190,12 @@ acpi_processor_get_throttling_info (
if (!pr->throttling.address) {
ACPI_DEBUG_PRINT((ACPI_DB_INFO, "No throttling register\n"));
return_VALUE(0);
- }
- else if (!pr->throttling.duty_width) {
+ } else if (!pr->throttling.duty_width) {
ACPI_DEBUG_PRINT((ACPI_DB_INFO, "No throttling states\n"));
return_VALUE(0);
}
/* TBD: Support duty_cycle values that span bit 4. */
- else if ((pr->throttling.duty_offset
- + pr->throttling.duty_width) > 4) {
+ else if ((pr->throttling.duty_offset + pr->throttling.duty_width) > 4) {
ACPI_DEBUG_PRINT((ACPI_DB_WARN, "duty_cycle spans bit 4\n"));
return_VALUE(0);
}
@@ -218,7 +207,7 @@ acpi_processor_get_throttling_info (
*/
if (errata.piix4.throttle) {
ACPI_DEBUG_PRINT((ACPI_DB_INFO,
- "Throttling not supported on PIIX4 A- or B-step\n"));
+ "Throttling not supported on PIIX4 A- or B-step\n"));
return_VALUE(0);
}
@@ -232,13 +221,13 @@ acpi_processor_get_throttling_info (
step = (1000 / pr->throttling.state_count);
- for (i=0; i<pr->throttling.state_count; i++) {
+ for (i = 0; i < pr->throttling.state_count; i++) {
pr->throttling.states[i].performance = step * i;
pr->throttling.states[i].power = step * i;
}
ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found %d throttling states\n",
- pr->throttling.state_count));
+ pr->throttling.state_count));
pr->flags.throttling = 1;
@@ -253,28 +242,29 @@ acpi_processor_get_throttling_info (
goto end;
if (pr->throttling.state) {
- ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Disabling throttling (was T%d)\n",
- pr->throttling.state));
+ ACPI_DEBUG_PRINT((ACPI_DB_INFO,
+ "Disabling throttling (was T%d)\n",
+ pr->throttling.state));
result = acpi_processor_set_throttling(pr, 0);
if (result)
goto end;
}
-end:
+ end:
if (result)
pr->flags.throttling = 0;
return_VALUE(result);
}
-
/* proc interface */
-static int acpi_processor_throttling_seq_show(struct seq_file *seq, void *offset)
+static int acpi_processor_throttling_seq_show(struct seq_file *seq,
+ void *offset)
{
- struct acpi_processor *pr = (struct acpi_processor *)seq->private;
- int i = 0;
- int result = 0;
+ struct acpi_processor *pr = (struct acpi_processor *)seq->private;
+ int i = 0;
+ int result = 0;
ACPI_FUNCTION_TRACE("acpi_processor_throttling_seq_show");
@@ -289,41 +279,41 @@ static int acpi_processor_throttling_seq_show(struct seq_file *seq, void *offset
result = acpi_processor_get_throttling(pr);
if (result) {
- seq_puts(seq, "Could not determine current throttling state.\n");
+ seq_puts(seq,
+ "Could not determine current throttling state.\n");
goto end;
}
seq_printf(seq, "state count: %d\n"
- "active state: T%d\n",
- pr->throttling.state_count,
- pr->throttling.state);
+ "active state: T%d\n",
+ pr->throttling.state_count, pr->throttling.state);
seq_puts(seq, "states:\n");
for (i = 0; i < pr->throttling.state_count; i++)
seq_printf(seq, " %cT%d: %02d%%\n",
- (i == pr->throttling.state?'*':' '), i,
- (pr->throttling.states[i].performance?pr->throttling.states[i].performance/10:0));
+ (i == pr->throttling.state ? '*' : ' '), i,
+ (pr->throttling.states[i].performance ? pr->
+ throttling.states[i].performance / 10 : 0));
-end:
+ end:
return_VALUE(0);
}
-static int acpi_processor_throttling_open_fs(struct inode *inode, struct file *file)
+static int acpi_processor_throttling_open_fs(struct inode *inode,
+ struct file *file)
{
return single_open(file, acpi_processor_throttling_seq_show,
- PDE(inode)->data);
+ PDE(inode)->data);
}
-ssize_t acpi_processor_write_throttling (
- struct file *file,
- const char __user *buffer,
- size_t count,
- loff_t *data)
+ssize_t acpi_processor_write_throttling(struct file * file,
+ const char __user * buffer,
+ size_t count, loff_t * data)
{
- int result = 0;
- struct seq_file *m = (struct seq_file *)file->private_data;
- struct acpi_processor *pr = (struct acpi_processor *)m->private;
- char state_string[12] = {'\0'};
+ int result = 0;
+ struct seq_file *m = (struct seq_file *)file->private_data;
+ struct acpi_processor *pr = (struct acpi_processor *)m->private;
+ char state_string[12] = { '\0' };
ACPI_FUNCTION_TRACE("acpi_processor_write_throttling");
@@ -336,7 +326,8 @@ ssize_t acpi_processor_write_throttling (
state_string[count] = '\0';
result = acpi_processor_set_throttling(pr,
- simple_strtoul(state_string, NULL, 0));
+ simple_strtoul(state_string,
+ NULL, 0));
if (result)
return_VALUE(result);
@@ -344,8 +335,8 @@ ssize_t acpi_processor_write_throttling (
}
struct file_operations acpi_processor_throttling_fops = {
- .open = acpi_processor_throttling_open_fs,
- .read = seq_read,
- .llseek = seq_lseek,
- .release = single_release,
+ .open = acpi_processor_throttling_open_fs,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = single_release,
};
generated by cgit v1.2.3 (git 2.0.4) at 2024-11-15 12:39:09 +0000