diff options
| -rw-r--r-- | arch/arm/mach-tegra/cpu-tegra.c | 48 |
1 files changed, 48 insertions, 0 deletions
diff --git a/arch/arm/mach-tegra/cpu-tegra.c b/arch/arm/mach-tegra/cpu-tegra.c index 90745de96c6b..d6793f87cc5f 100644 --- a/arch/arm/mach-tegra/cpu-tegra.c +++ b/arch/arm/mach-tegra/cpu-tegra.c @@ -84,6 +84,53 @@ static struct kernel_param_ops policy_ops = { module_param_cb(force_policy_max, &policy_ops, &force_policy_max, 0644); +static unsigned int cpu_user_cap; + +static int cpu_user_cap_set(const char *arg, const struct kernel_param *kp) +{ + int ret; + + mutex_lock(&tegra_cpu_lock); + + ret = param_set_uint(arg, kp); + if (ret == 0) { +#ifndef CONFIG_TEGRA_CPU_CAP_EXACT_FREQ + if (cpu_user_cap != 0) { + int i; + for (i = 0; freq_table[i].frequency != + CPUFREQ_TABLE_END; i++) { + if (freq_table[i].frequency > cpu_user_cap) + break; + } + i = (i == 0) ? 0 : i - 1; + cpu_user_cap = freq_table[i].frequency; + } +#endif + tegra_cpu_set_speed_cap(NULL); + } + + mutex_unlock(&tegra_cpu_lock); + return ret; +} + +static int cpu_user_cap_get(char *buffer, const struct kernel_param *kp) +{ + return param_get_uint(buffer, kp); +} + +static struct kernel_param_ops cap_ops = { + .set = cpu_user_cap_set, + .get = cpu_user_cap_get, +}; +module_param_cb(cpu_user_cap, &cap_ops, &cpu_user_cap, 0644); + +static unsigned int user_cap_speed(unsigned int requested_speed) +{ + if ((cpu_user_cap) && (requested_speed > cpu_user_cap)) + return cpu_user_cap; + return requested_speed; +} + #ifdef CONFIG_TEGRA_THERMAL_THROTTLE static ssize_t show_throttle(struct cpufreq_policy *policy, char *buf) @@ -444,6 +491,7 @@ int tegra_cpu_set_speed_cap(unsigned int *speed_cap) new_speed = tegra_throttle_governor_speed(new_speed); new_speed = edp_governor_speed(new_speed); + new_speed = user_cap_speed(new_speed); if (speed_cap) *speed_cap = new_speed; |