// SPDX-License-Identifier: GPL-2.0-only /* * A devfreq driver for NVIDIA Tegra SoCs * * Copyright (c) 2014 NVIDIA CORPORATION. All rights reserved. * Copyright (C) 2014 Google, Inc */ #include <linux/clk.h> #include <linux/cpufreq.h> #include <linux/devfreq.h> #include <linux/interrupt.h> #include <linux/io.h> #include <linux/irq.h> #include <linux/module.h> #include <linux/of.h> #include <linux/platform_device.h> #include <linux/pm_opp.h> #include <linux/reset.h> #include <linux/workqueue.h> #include <soc/tegra/fuse.h> #include "governor.h" #define ACTMON_GLB_STATUS … #define ACTMON_GLB_PERIOD_CTRL … #define ACTMON_DEV_CTRL … #define ACTMON_DEV_CTRL_K_VAL_SHIFT … #define ACTMON_DEV_CTRL_ENB_PERIODIC … #define ACTMON_DEV_CTRL_AVG_BELOW_WMARK_EN … #define ACTMON_DEV_CTRL_AVG_ABOVE_WMARK_EN … #define ACTMON_DEV_CTRL_CONSECUTIVE_BELOW_WMARK_NUM_SHIFT … #define ACTMON_DEV_CTRL_CONSECUTIVE_ABOVE_WMARK_NUM_SHIFT … #define ACTMON_DEV_CTRL_CONSECUTIVE_BELOW_WMARK_EN … #define ACTMON_DEV_CTRL_CONSECUTIVE_ABOVE_WMARK_EN … #define ACTMON_DEV_CTRL_ENB … #define ACTMON_DEV_CTRL_STOP … #define ACTMON_DEV_UPPER_WMARK … #define ACTMON_DEV_LOWER_WMARK … #define ACTMON_DEV_INIT_AVG … #define ACTMON_DEV_AVG_UPPER_WMARK … #define ACTMON_DEV_AVG_LOWER_WMARK … #define ACTMON_DEV_COUNT_WEIGHT … #define ACTMON_DEV_AVG_COUNT … #define ACTMON_DEV_INTR_STATUS … #define ACTMON_INTR_STATUS_CLEAR … #define ACTMON_DEV_INTR_CONSECUTIVE_UPPER … #define ACTMON_DEV_INTR_CONSECUTIVE_LOWER … #define ACTMON_ABOVE_WMARK_WINDOW … #define ACTMON_BELOW_WMARK_WINDOW … #define ACTMON_BOOST_FREQ_STEP … /* * ACTMON_AVERAGE_WINDOW_LOG2: default value for @DEV_CTRL_K_VAL, which * translates to 2 ^ (K_VAL + 1). ex: 2 ^ (6 + 1) = 128 */ #define ACTMON_AVERAGE_WINDOW_LOG2 … #define ACTMON_SAMPLING_PERIOD … #define ACTMON_DEFAULT_AVG_BAND … #define KHZ … #define KHZ_MAX … /* Assume that the bus is saturated if the utilization is 25% */ #define BUS_SATURATION_RATIO … /** * struct tegra_devfreq_device_config - configuration specific to an ACTMON * device * * Coefficients and thresholds are percentages unless otherwise noted */ struct tegra_devfreq_device_config { … }; enum tegra_actmon_device { … }; static const struct tegra_devfreq_device_config tegra124_device_configs[] = …; static const struct tegra_devfreq_device_config tegra30_device_configs[] = …; /** * struct tegra_devfreq_device - state specific to an ACTMON device * * Frequencies are in kHz. */ struct tegra_devfreq_device { … }; struct tegra_devfreq_soc_data { … }; struct tegra_devfreq { … }; struct tegra_actmon_emc_ratio { … }; static const struct tegra_actmon_emc_ratio actmon_emc_ratios[] = …; static u32 actmon_readl(struct tegra_devfreq *tegra, u32 offset) { … } static void actmon_writel(struct tegra_devfreq *tegra, u32 val, u32 offset) { … } static u32 device_readl(struct tegra_devfreq_device *dev, u32 offset) { … } static void device_writel(struct tegra_devfreq_device *dev, u32 val, u32 offset) { … } static unsigned long do_percent(unsigned long long val, unsigned int pct) { … } static void tegra_devfreq_update_avg_wmark(struct tegra_devfreq *tegra, struct tegra_devfreq_device *dev) { … } static void tegra_devfreq_update_wmark(struct tegra_devfreq *tegra, struct tegra_devfreq_device *dev) { … } static void actmon_isr_device(struct tegra_devfreq *tegra, struct tegra_devfreq_device *dev) { … } static unsigned long actmon_cpu_to_emc_rate(struct tegra_devfreq *tegra, unsigned long cpu_freq) { … } static unsigned long actmon_device_target_freq(struct tegra_devfreq *tegra, struct tegra_devfreq_device *dev) { … } static void actmon_update_target(struct tegra_devfreq *tegra, struct tegra_devfreq_device *dev) { … } static irqreturn_t actmon_thread_isr(int irq, void *data) { … } static int tegra_actmon_clk_notify_cb(struct notifier_block *nb, unsigned long action, void *ptr) { … } static void tegra_actmon_delayed_update(struct work_struct *work) { … } static unsigned long tegra_actmon_cpufreq_contribution(struct tegra_devfreq *tegra, unsigned int cpu_freq) { … } static int tegra_actmon_cpu_notify_cb(struct notifier_block *nb, unsigned long action, void *ptr) { … } static void tegra_actmon_configure_device(struct tegra_devfreq *tegra, struct tegra_devfreq_device *dev) { … } static void tegra_actmon_stop_devices(struct tegra_devfreq *tegra) { … } static int tegra_actmon_resume(struct tegra_devfreq *tegra) { … } static int tegra_actmon_start(struct tegra_devfreq *tegra) { … } static void tegra_actmon_pause(struct tegra_devfreq *tegra) { … } static void tegra_actmon_stop(struct tegra_devfreq *tegra) { … } static int tegra_devfreq_target(struct device *dev, unsigned long *freq, u32 flags) { … } static int tegra_devfreq_get_dev_status(struct device *dev, struct devfreq_dev_status *stat) { … } static struct devfreq_dev_profile tegra_devfreq_profile = …; static int tegra_governor_get_target(struct devfreq *devfreq, unsigned long *freq) { … } static int tegra_governor_event_handler(struct devfreq *devfreq, unsigned int event, void *data) { … } static struct devfreq_governor tegra_devfreq_governor = …; static void devm_tegra_devfreq_deinit_hw(void *data) { … } static int devm_tegra_devfreq_init_hw(struct device *dev, struct tegra_devfreq *tegra) { … } static int tegra_devfreq_config_clks_nop(struct device *dev, struct opp_table *opp_table, struct dev_pm_opp *opp, void *data, bool scaling_down) { … } static int tegra_devfreq_probe(struct platform_device *pdev) { … } static const struct tegra_devfreq_soc_data tegra124_soc = …; static const struct tegra_devfreq_soc_data tegra30_soc = …; static const struct of_device_id tegra_devfreq_of_match[] = …; MODULE_DEVICE_TABLE(of, tegra_devfreq_of_match); static struct platform_driver tegra_devfreq_driver = …; module_platform_driver(…) …; MODULE_LICENSE(…) …; MODULE_DESCRIPTION(…) …; MODULE_AUTHOR(…) …;
Codebase Browser
linux