diff options
Diffstat (limited to 'drivers/acpi')
| -rw-r--r-- | drivers/acpi/ec.c | 10 | ||||
| -rw-r--r-- | drivers/acpi/processor_driver.c | 2 | ||||
| -rw-r--r-- | drivers/acpi/processor_perflib.c | 22 | ||||
| -rw-r--r-- | drivers/acpi/video_detect.c | 2 |
4 files changed, 34 insertions, 2 deletions
diff --git a/drivers/acpi/ec.c b/drivers/acpi/ec.c index 3268dcfbaa9b..7edaccce6640 100644 --- a/drivers/acpi/ec.c +++ b/drivers/acpi/ec.c @@ -445,6 +445,16 @@ int ec_transaction(u8 command, EXPORT_SYMBOL(ec_transaction); +/* Get the handle to the EC device */ +acpi_handle ec_get_handle(void) +{ + if (!first_ec) + return NULL; + return first_ec->handle; +} + +EXPORT_SYMBOL(ec_get_handle); + void acpi_ec_block_transactions(void) { struct acpi_ec *ec = first_ec; diff --git a/drivers/acpi/processor_driver.c b/drivers/acpi/processor_driver.c index 41de1355edcd..0734086537b8 100644 --- a/drivers/acpi/processor_driver.c +++ b/drivers/acpi/processor_driver.c @@ -46,7 +46,6 @@ #include <linux/slab.h> #include <asm/io.h> -#include <asm/system.h> #include <asm/cpu.h> #include <asm/delay.h> #include <asm/uaccess.h> @@ -475,6 +474,7 @@ static __ref int acpi_processor_start(struct acpi_processor *pr) #ifdef CONFIG_CPU_FREQ acpi_processor_ppc_has_changed(pr, 0); + acpi_processor_load_module(pr); #endif acpi_processor_get_throttling_info(pr); acpi_processor_get_limit_info(pr); diff --git a/drivers/acpi/processor_perflib.c b/drivers/acpi/processor_perflib.c index 85b32376dad7..0af48a8554cd 100644 --- a/drivers/acpi/processor_perflib.c +++ b/drivers/acpi/processor_perflib.c @@ -240,6 +240,28 @@ void acpi_processor_ppc_exit(void) acpi_processor_ppc_status &= ~PPC_REGISTERED; } +/* + * Do a quick check if the systems looks like it should use ACPI + * cpufreq. We look at a _PCT method being available, but don't + * do a whole lot of sanity checks. + */ +void acpi_processor_load_module(struct acpi_processor *pr) +{ + static int requested; + acpi_status status = 0; + struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; + + if (!arch_has_acpi_pdc() || requested) + return; + status = acpi_evaluate_object(pr->handle, "_PCT", NULL, &buffer); + if (!ACPI_FAILURE(status)) { + printk(KERN_INFO PREFIX "Requesting acpi_cpufreq\n"); + request_module_nowait("acpi_cpufreq"); + requested = 1; + } + kfree(buffer.pointer); +} + static int acpi_processor_get_performance_control(struct acpi_processor *pr) { int result = 0; diff --git a/drivers/acpi/video_detect.c b/drivers/acpi/video_detect.c index f3f0fe7e255a..45d8097ef4cf 100644 --- a/drivers/acpi/video_detect.c +++ b/drivers/acpi/video_detect.c @@ -23,7 +23,7 @@ * Depending on whether ACPI graphics extensions (cmp. ACPI spec Appendix B) * are available, video.ko should be used to handle the device. * - * Otherwise vendor specific drivers like thinkpad_acpi, asus_acpi, + * Otherwise vendor specific drivers like thinkpad_acpi, asus-laptop, * sony_acpi,... can take care about backlight brightness. * * If CONFIG_ACPI_VIDEO is neither set as "compiled in" (y) nor as a module (m) |