X-Git-Url: http://git.onelab.eu/?a=blobdiff_plain;f=drivers%2Facpi%2Fprocessor_throttling.c;fp=drivers%2Facpi%2Fprocessor_throttling.c;h=b966549ec000487eecce9f3e1edc53a72cd51964;hb=43bc926fffd92024b46cafaf7350d669ba9ca884;hp=be9f569d39d33f73784e507322cffbed40c3e114;hpb=cee37fe97739d85991964371c1f3a745c00dd236;p=linux-2.6.git diff --git a/drivers/acpi/processor_throttling.c b/drivers/acpi/processor_throttling.c index be9f569d3..b966549ec 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; ithrottling.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) +static 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 +335,9 @@ 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, + .write = acpi_processor_write_throttling, + .llseek = seq_lseek, + .release = single_release, };