diff options
| author | Alex Frid <afrid@nvidia.com> | 2011-10-05 21:20:21 -0700 |
|---|---|---|
| committer | Dan Willemsen <dwillemsen@nvidia.com> | 2012-03-22 23:49:25 -0700 |
| commit | 44f04419f67ad370e68ade0ae7c4203a508261ff (patch) | |
| tree | aded1f56e243ce60e538ca8233935ede37b9903f /arch/arm/mach-tegra/include/mach/edp.h | |
| parent | 8d5de40ff0994b6d965ea1726bde48dea7f53265 (diff) | |
ARM: tegra: power: Limit CPU rate on system EDP alarm
System electrical design point (EDP) alarm is generated when system
power source (battery) over-current is detected.
Part of the system EDP management is CPU frequency capping added by
this commit. Maximum CPU clock frequency is pre-determined depending
on number of CPU cores on-line. It is combined with CPU regulator EDP
limit and applied to final CPU rate; CPU voltage is scaled down by
DVFS, respectively. The system EDP limit of CPU rate is removed after
alarm is canceled.
EDP event can be emulated via debugfs entry /d/cpu-tegra/edp_alarm.
(cherry picked from commit fa673d27766ff9513139e94a498e4c24827d7c57)
arm: tegra: power: Removed erroneous ';'
(cherry picked from commit b4b404381b2d1823b7c127858950f853428fe3b5)
Change-Id: I60ec0e87f9442b698a8824895aac0a1f955565b4
Signed-off-by: Alex Frid <afrid@nvidia.com>
Reviewed-on: http://git-master/r/67823
Reviewed-by: Simone Willett <swillett@nvidia.com>
Tested-by: Simone Willett <swillett@nvidia.com>
Rebase-Id: R6a004bea8dfc99cd965f94035481907007bd1e32
Diffstat (limited to 'arch/arm/mach-tegra/include/mach/edp.h')
| -rw-r--r-- | arch/arm/mach-tegra/include/mach/edp.h | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/arch/arm/mach-tegra/include/mach/edp.h b/arch/arm/mach-tegra/include/mach/edp.h index 92d2e4f3f196..48321cae4959 100644 --- a/arch/arm/mach-tegra/include/mach/edp.h +++ b/arch/arm/mach-tegra/include/mach/edp.h @@ -35,18 +35,28 @@ struct tegra_edp_limits { unsigned int freq_limits[4]; }; +struct system_edp_entry { + char speedo_id; + char power_limit_100mW; + char freq_limits[4]; +}; #ifdef CONFIG_TEGRA_EDP_LIMITS int tegra_edp_update_thermal_zone(int temperature); void tegra_init_cpu_edp_limits(unsigned int regulator_mA); +void tegra_init_system_edp_limits(unsigned int power_limit_mW); void tegra_get_cpu_edp_limits(const struct tegra_edp_limits **limits, int *size); unsigned int tegra_get_edp_limit(void); +void tegra_get_system_edp_limits(const unsigned int **limits); +int tegra_system_edp_alarm(bool alarm); #else static inline void tegra_init_cpu_edp_limits(int regulator_mA) {} +static inline void tegra_init_system_edp_limits(int power_limit_mW) +{} static inline int tegra_edp_update_thermal_zone(int temperature) { return -1; } static inline void tegra_get_cpu_edp_limits(struct tegra_edp_limits **limits, @@ -54,6 +64,10 @@ static inline void tegra_get_cpu_edp_limits(struct tegra_edp_limits **limits, {} static inline unsigned int tegra_get_edp_limit(void) { return -1; } +static inline void tegra_get_system_edp_limits(unsigned int **limits) +{} +static inline int tegra_system_edp_alarm(bool alarm) +{ return -1; } #endif #ifdef CONFIG_ARCH_TEGRA_2x_SOC |