From: "Dawei.Chien" <dawei.ch...@mediatek.com> This power model is base on Intelligent Power Allocation (IPA) technical, requires that the operating-points of the CPUs are registered using the kernel's opp library and the `cpufreq_frequency_table` is assigned to the `struct device` of the cpu MT8173.
Signed-off-by: Dawei.Chien <dawei.ch...@mediatek.com> --- This patch is base on https://patchwork.kernel.org/patch/7034601/ --- drivers/cpufreq/mt8173-cpufreq.c | 97 +++++++++++++++++++++++++++++++++----- 1 file changed, 86 insertions(+), 11 deletions(-) diff --git a/drivers/cpufreq/mt8173-cpufreq.c b/drivers/cpufreq/mt8173-cpufreq.c index 49caed2..9233ec5 100644 --- a/drivers/cpufreq/mt8173-cpufreq.c +++ b/drivers/cpufreq/mt8173-cpufreq.c @@ -28,7 +28,8 @@ #define MAX_VOLT_SHIFT (200000) #define MAX_VOLT_LIMIT (1150000) #define VOLT_TOL (10000) - +#define CAPACITANCE_CA53 (263) +#define CAPACITANCE_CA57 (530) /* * The struct mtk_cpu_dvfs_info holds necessary information for doing CPU DVFS * on each CPU power/clock domain of Mediatek SoCs. Each CPU cluster in @@ -51,6 +52,72 @@ struct mtk_cpu_dvfs_info { bool need_voltage_tracking; }; +struct mtk_cpu_static_power { + unsigned long voltage; + unsigned int power; +}; + +/* measured by WA program. */ +static const struct mtk_cpu_static_power mtk_ca53_static_power[] = { + {859000, 43}, + {908000, 52}, + {983000, 86}, + {1009000, 123}, + {1028000, 138}, + {1083000, 172}, + {1109000, 180}, + {1125000, 192}, +}; + +/* measured by WA program. */ +static const struct mtk_cpu_static_power mtk_ca57_static_power[] = { + {828000, 72}, + {867000, 90}, + {927000, 156}, + {968000, 181}, + {1007000, 298}, + {1049000, 435}, + {1089000, 533}, + {1125000, 533}, +}; + +unsigned int mtk_cpufreq_lookup_power(const struct mtk_cpu_static_power *table, + unsigned int count, unsigned long voltage) +{ + int i; + + for (i = 0; i < count; i++) { + if (voltage <= table[i].voltage) + return table[i].power; + } + + return table[count - 1].power; +} + +int mtk_cpufreq_get_static(cpumask_t *cpumask, int interval, + unsigned long voltage, u32 *power) +{ + int nr_cpus = cpumask_weight(cpumask); + + *power = 0; + + if (nr_cpus) { + + if (cpumask_test_cpu(0, cpumask)) + *power += mtk_cpufreq_lookup_power( + mtk_ca53_static_power, + ARRAY_SIZE(mtk_ca53_static_power), + voltage); + + if (cpumask_test_cpu(2, cpumask)) + *power += mtk_cpufreq_lookup_power( + mtk_ca57_static_power, + ARRAY_SIZE(mtk_ca57_static_power), + voltage); + } + return 0; +} + static int mtk_cpufreq_voltage_tracking(struct mtk_cpu_dvfs_info *info, int new_vproc) { @@ -272,15 +339,21 @@ static void mtk_cpufreq_ready(struct cpufreq_policy *policy) return; if (of_find_property(np, "#cooling-cells", NULL)) { - info->cdev = of_cpufreq_cooling_register(np, - policy->related_cpus); - - if (IS_ERR(info->cdev)) { - dev_err(info->cpu_dev, - "running cpufreq without cooling device: %ld\n", - PTR_ERR(info->cdev)); - - info->cdev = NULL; + u32 capacitance = cpumask_test_cpu(0, policy->related_cpus) ? + CAPACITANCE_CA53 : CAPACITANCE_CA57; + + if (!info->cdev) { + info->cdev = of_cpufreq_power_cooling_register(np, + policy->related_cpus, + capacitance, + mtk_cpufreq_get_static); + + if (IS_ERR(info->cdev)) { + dev_err(info->cpu_dev, + "running cpufreq without cooling device: %ld\n", + PTR_ERR(info->cdev)); + info->cdev = NULL; + } } } @@ -460,7 +533,9 @@ static int mtk_cpufreq_exit(struct cpufreq_policy *policy) { struct mtk_cpu_dvfs_info *info = policy->driver_data; - cpufreq_cooling_unregister(info->cdev); + if (info->cdev) + cpufreq_cooling_unregister(info->cdev); + dev_pm_opp_free_cpufreq_table(info->cpu_dev, &policy->freq_table); mtk_cpu_dvfs_info_release(info); kfree(info); -- 1.7.9.5 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
