diff options
Diffstat (limited to 'arch/arm/mach-tegra/tegra3_dvfs.c')
-rw-r--r-- | arch/arm/mach-tegra/tegra3_dvfs.c | 46 |
1 files changed, 43 insertions, 3 deletions
diff --git a/arch/arm/mach-tegra/tegra3_dvfs.c b/arch/arm/mach-tegra/tegra3_dvfs.c index 38f6ed0b317c..feb69a4621ed 100644 --- a/arch/arm/mach-tegra/tegra3_dvfs.c +++ b/arch/arm/mach-tegra/tegra3_dvfs.c @@ -21,6 +21,7 @@ #include <linux/clk.h> #include <linux/kobject.h> #include <linux/err.h> +#include <linux/time.h> #include "clock.h" #include "dvfs.h" @@ -28,12 +29,16 @@ #include "board.h" #include "tegra3_emc.h" +#define CPU_MILLIVOLTS {\ + 750, 762, 775, 787, 800, 825, 837, 850, 862, 875, 887, 900, 912, 916, 925, 937, 950, 962, 975, 987, 1000, 1007, 1012, 1025, 1037, 1050, 1062, 1075, 1087, 1100, 1112, 1125, 1137, 1150, 1162, 1175, 1187, 1200, 1212, 1237}; + static bool tegra_dvfs_cpu_disabled; static bool tegra_dvfs_core_disabled; static struct dvfs *cpu_dvfs; -static const int cpu_millivolts[MAX_DVFS_FREQS] = { - 750, 762, 775, 787, 800, 825, 837, 850, 862, 875, 887, 900, 912, 916, 925, 937, 950, 962, 975, 987, 1000, 1007, 1012, 1025, 1037, 1050, 1062, 1075, 1087, 1100, 1112, 1125, 1137, 1150, 1162, 1175, 1187, 1200, 1212, 1237}; +static int cpu_millivolts[MAX_DVFS_FREQS] = CPU_MILLIVOLTS; + +static const int cpu_millivolts_aged[MAX_DVFS_FREQS] = CPU_MILLIVOLTS; static const unsigned int cpu_cold_offs_mhz[MAX_DVFS_FREQS] = { 50, 50, 50, 50, 50, 50, 50, 50, 50, 50, 50, 50, 50, 50, 50, 50, 50, 50, 50, 50, 50, 50, 50, 50, 50, 50, 50, 50, 50, 50, 50, 50, 50, 50, 50, 50, 50, 50, 50, 50}; @@ -54,7 +59,7 @@ static int cpu_below_core = VDD_CPU_BELOW_VDD_CORE; static struct dvfs_rail tegra3_dvfs_rail_vdd_cpu = { .reg_id = "vdd_cpu", .max_millivolts = 1250, - .min_millivolts = 750, + .min_millivolts = 725, .step = VDD_SAFE_STEP, .jmp_to_zero = true, }; @@ -632,6 +637,41 @@ static int __init get_core_nominal_mv_index(int speedo_id) return (i - 1); } +static void tegra_adjust_cpu_mvs(int mvs) +{ + int i; + + BUG_ON(ARRAY_SIZE(cpu_millivolts) != ARRAY_SIZE(cpu_millivolts_aged)); + + for (i = 0; i < ARRAY_SIZE(cpu_millivolts); i++) + cpu_millivolts[i] = cpu_millivolts_aged[i] - mvs; +} + +/** + * Adjust VDD_CPU to offset aging. + * 25mV for 1st year + * 12mV for 2nd and 3rd year + * 0mV for 4th year onwards + */ +void tegra_dvfs_age_cpu(int cur_linear_age) +{ + int chip_linear_age; + int chip_life; + chip_linear_age = tegra_get_age(); + chip_life = cur_linear_age - chip_linear_age; + + /*For T37 and AP37*/ + if (tegra_cpu_speedo_id() == 12 || tegra_cpu_speedo_id() == 13) { + if (chip_linear_age <= 0) { + return; + } else if (chip_life <= 12) { + tegra_adjust_cpu_mvs(25); + } else if (chip_life <= 36) { + tegra_adjust_cpu_mvs(13); + } + } +} + void __init tegra_soc_init_dvfs(void) { int cpu_speedo_id = tegra_cpu_speedo_id(); |