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![Linus Torvalds](/assets/img/avatar_default.png)
- Thermal framework cleanups (self-encapsulation, pointless stubs, private structures) (Daniel Lezcano) - Use the PM QoS frequency changes for the devfreq cooling device (Matthias Kaehlcke) - Remove duplicate error messages from platform_get_irq() error handling (Markus Elfring) - Add support for the bandgap sensors (Keerthy) - Statically initialize .get_mode/.set_mode ops (Andrzej Pietrasiewicz) - Add Renesas R-Car maintainer entry (Niklas Söderlund) - Fix error checking after calling ti_bandgap_get_sensor_data() for the TI SoC thermal (Sudip Mukherjee) - Add latency constraint for the idle injection, the DT binding and the change the registering function (Daniel Lezcano) - Convert the thermal framework binding to the Yaml schema (Amit Kucheria) - Replace zero-length array with flexible-array on i.MX 8MM (Gustavo A. R. Silva) - Thermal framework cleanups (alphabetic order for heads, replace module.h by export.h, make file naming consistent) (Amit Kucheria) - Merge tsens-common into the tsens driver (Amit Kucheria) - Fix platform dependency for the Qoriq driver (Geert Uytterhoeven) - Clean up the rcar_thermal_update_temp() function in the rcar thermal driver (Niklas Söderlund) - Fix the TMSAR register for the TMUv2 on the Qoriq platform (Yuantian Tang) - Export GDDV, OEM vendor variables, and don't require IDSP for the int340x thermal driver - trivial conflicts fixed (Matthew Garrett) -----BEGIN PGP SIGNATURE----- iQEzBAABCAAdFiEEGn3N4YVz0WNVyHskqDIjiipP6E8FAl7jra8ACgkQqDIjiipP 6E+ugAgApBF6FsHoonWIvoSrzBrrbU2oqhEJA42Mx+iY/UnXi01I79vZ/8WpZt7M D1J01Kf0PUhRbywoKaoCX3Oh9ZO9PKq4N9ZC8yqdoD6GLl+rC9Wmr7Ui+c80klcv M9rYhpPYfNXTFj0saSbbFWNNhP4TvhzGsNj8foYVQDKyhjbSmNE5ipZlbmP23jlr O53SmJAwS5zxLOd8QA5nfSWP9FYYMuCR2AHj8BUCmxiAjXZLPNB/Hz2RRBr7q0MF zRo/4HJ04mSQYp0kluP/EBhz9g2wM/htIPyWRveB/ByKEYt3UNKjB++PJmPbu5UG dS3aXZhRfaPqpdsWrMB9fY7ll+oyfw== =T+RI -----END PGP SIGNATURE----- Merge tag 'thermal-v5.8-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/thermal/linux Pull thermal updates from Daniel Lezcano: - Add the hwmon support on the i.MX SC (Anson Huang) - Thermal framework cleanups (self-encapsulation, pointless stubs, private structures) (Daniel Lezcano) - Use the PM QoS frequency changes for the devfreq cooling device (Matthias Kaehlcke) - Remove duplicate error messages from platform_get_irq() error handling (Markus Elfring) - Add support for the bandgap sensors (Keerthy) - Statically initialize .get_mode/.set_mode ops (Andrzej Pietrasiewicz) - Add Renesas R-Car maintainer entry (Niklas Söderlund) - Fix error checking after calling ti_bandgap_get_sensor_data() for the TI SoC thermal (Sudip Mukherjee) - Add latency constraint for the idle injection, the DT binding and the change the registering function (Daniel Lezcano) - Convert the thermal framework binding to the Yaml schema (Amit Kucheria) - Replace zero-length array with flexible-array on i.MX 8MM (Gustavo A. R. Silva) - Thermal framework cleanups (alphabetic order for heads, replace module.h by export.h, make file naming consistent) (Amit Kucheria) - Merge tsens-common into the tsens driver (Amit Kucheria) - Fix platform dependency for the Qoriq driver (Geert Uytterhoeven) - Clean up the rcar_thermal_update_temp() function in the rcar thermal driver (Niklas Söderlund) - Fix the TMSAR register for the TMUv2 on the Qoriq platform (Yuantian Tang) - Export GDDV, OEM vendor variables, and don't require IDSP for the int340x thermal driver - trivial conflicts fixed (Matthew Garrett) * tag 'thermal-v5.8-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/thermal/linux: (48 commits) thermal/int340x_thermal: Don't require IDSP to exist thermal/int340x_thermal: Export OEM vendor variables thermal/int340x_thermal: Export GDDV thermal: qoriq: Update the settings for TMUv2 thermal: rcar_thermal: Clean up rcar_thermal_update_temp() thermal: qoriq: Add platform dependencies drivers: thermal: tsens: Merge tsens-common.c into tsens.c thermal/of: Rename of-thermal.c thermal/governors: Prefix all source files with gov_ thermal/drivers/user_space: Sort headers alphabetically thermal/drivers/of-thermal: Sort headers alphabetically thermal/drivers/cpufreq_cooling: Replace module.h with export.h thermal/drivers/cpufreq_cooling: Sort headers alphabetically thermal/drivers/clock_cooling: Include export.h thermal/drivers/clock_cooling: Sort headers alphabetically thermal/drivers/thermal_hwmon: Include export.h thermal/drivers/thermal_hwmon: Sort headers alphabetically thermal/drivers/thermal_helpers: Include export.h thermal/drivers/thermal_helpers: Sort headers alphabetically thermal/core: Replace module.h with export.h ...
364 lines
8.1 KiB
C
364 lines
8.1 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* PSCI CPU idle driver.
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*
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* Copyright (C) 2019 ARM Ltd.
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* Author: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
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*/
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#define pr_fmt(fmt) "CPUidle PSCI: " fmt
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#include <linux/cpuhotplug.h>
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#include <linux/cpu_cooling.h>
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#include <linux/cpuidle.h>
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#include <linux/cpumask.h>
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#include <linux/cpu_pm.h>
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/of.h>
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#include <linux/of_device.h>
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#include <linux/psci.h>
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#include <linux/pm_runtime.h>
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#include <linux/slab.h>
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#include <asm/cpuidle.h>
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#include "cpuidle-psci.h"
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#include "dt_idle_states.h"
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struct psci_cpuidle_data {
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u32 *psci_states;
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struct device *dev;
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};
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static DEFINE_PER_CPU_READ_MOSTLY(struct psci_cpuidle_data, psci_cpuidle_data);
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static DEFINE_PER_CPU(u32, domain_state);
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static bool psci_cpuidle_use_cpuhp __initdata;
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void psci_set_domain_state(u32 state)
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{
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__this_cpu_write(domain_state, state);
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}
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static inline u32 psci_get_domain_state(void)
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{
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return __this_cpu_read(domain_state);
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}
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static inline int psci_enter_state(int idx, u32 state)
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{
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return CPU_PM_CPU_IDLE_ENTER_PARAM(psci_cpu_suspend_enter, idx, state);
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}
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static int psci_enter_domain_idle_state(struct cpuidle_device *dev,
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struct cpuidle_driver *drv, int idx)
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{
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struct psci_cpuidle_data *data = this_cpu_ptr(&psci_cpuidle_data);
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u32 *states = data->psci_states;
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struct device *pd_dev = data->dev;
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u32 state;
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int ret;
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ret = cpu_pm_enter();
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if (ret)
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return -1;
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/* Do runtime PM to manage a hierarchical CPU toplogy. */
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pm_runtime_put_sync_suspend(pd_dev);
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state = psci_get_domain_state();
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if (!state)
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state = states[idx];
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ret = psci_cpu_suspend_enter(state) ? -1 : idx;
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pm_runtime_get_sync(pd_dev);
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cpu_pm_exit();
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/* Clear the domain state to start fresh when back from idle. */
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psci_set_domain_state(0);
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return ret;
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}
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static int psci_idle_cpuhp_up(unsigned int cpu)
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{
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struct device *pd_dev = __this_cpu_read(psci_cpuidle_data.dev);
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if (pd_dev)
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pm_runtime_get_sync(pd_dev);
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return 0;
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}
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static int psci_idle_cpuhp_down(unsigned int cpu)
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{
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struct device *pd_dev = __this_cpu_read(psci_cpuidle_data.dev);
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if (pd_dev) {
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pm_runtime_put_sync(pd_dev);
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/* Clear domain state to start fresh at next online. */
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psci_set_domain_state(0);
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}
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return 0;
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}
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static void __init psci_idle_init_cpuhp(void)
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{
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int err;
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if (!psci_cpuidle_use_cpuhp)
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return;
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err = cpuhp_setup_state_nocalls(CPUHP_AP_CPU_PM_STARTING,
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"cpuidle/psci:online",
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psci_idle_cpuhp_up,
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psci_idle_cpuhp_down);
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if (err)
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pr_warn("Failed %d while setup cpuhp state\n", err);
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}
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static int psci_enter_idle_state(struct cpuidle_device *dev,
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struct cpuidle_driver *drv, int idx)
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{
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u32 *state = __this_cpu_read(psci_cpuidle_data.psci_states);
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return psci_enter_state(idx, state[idx]);
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}
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static struct cpuidle_driver psci_idle_driver __initdata = {
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.name = "psci_idle",
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.owner = THIS_MODULE,
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/*
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* PSCI idle states relies on architectural WFI to
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* be represented as state index 0.
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*/
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.states[0] = {
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.enter = psci_enter_idle_state,
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.exit_latency = 1,
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.target_residency = 1,
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.power_usage = UINT_MAX,
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.name = "WFI",
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.desc = "ARM WFI",
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}
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};
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static const struct of_device_id psci_idle_state_match[] __initconst = {
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{ .compatible = "arm,idle-state",
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.data = psci_enter_idle_state },
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{ },
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};
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int __init psci_dt_parse_state_node(struct device_node *np, u32 *state)
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{
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int err = of_property_read_u32(np, "arm,psci-suspend-param", state);
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if (err) {
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pr_warn("%pOF missing arm,psci-suspend-param property\n", np);
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return err;
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}
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if (!psci_power_state_is_valid(*state)) {
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pr_warn("Invalid PSCI power state %#x\n", *state);
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return -EINVAL;
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}
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return 0;
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}
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static int __init psci_dt_cpu_init_topology(struct cpuidle_driver *drv,
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struct psci_cpuidle_data *data,
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unsigned int state_count, int cpu)
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{
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/* Currently limit the hierarchical topology to be used in OSI mode. */
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if (!psci_has_osi_support())
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return 0;
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data->dev = psci_dt_attach_cpu(cpu);
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if (IS_ERR_OR_NULL(data->dev))
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return PTR_ERR_OR_ZERO(data->dev);
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/*
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* Using the deepest state for the CPU to trigger a potential selection
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* of a shared state for the domain, assumes the domain states are all
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* deeper states.
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*/
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drv->states[state_count - 1].enter = psci_enter_domain_idle_state;
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psci_cpuidle_use_cpuhp = true;
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return 0;
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}
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static int __init psci_dt_cpu_init_idle(struct cpuidle_driver *drv,
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struct device_node *cpu_node,
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unsigned int state_count, int cpu)
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{
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int i, ret = 0;
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u32 *psci_states;
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struct device_node *state_node;
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struct psci_cpuidle_data *data = per_cpu_ptr(&psci_cpuidle_data, cpu);
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state_count++; /* Add WFI state too */
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psci_states = kcalloc(state_count, sizeof(*psci_states), GFP_KERNEL);
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if (!psci_states)
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return -ENOMEM;
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for (i = 1; i < state_count; i++) {
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state_node = of_get_cpu_state_node(cpu_node, i - 1);
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if (!state_node)
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break;
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ret = psci_dt_parse_state_node(state_node, &psci_states[i]);
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of_node_put(state_node);
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if (ret)
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goto free_mem;
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pr_debug("psci-power-state %#x index %d\n", psci_states[i], i);
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}
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if (i != state_count) {
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ret = -ENODEV;
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goto free_mem;
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}
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/* Initialize optional data, used for the hierarchical topology. */
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ret = psci_dt_cpu_init_topology(drv, data, state_count, cpu);
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if (ret < 0)
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goto free_mem;
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/* Idle states parsed correctly, store them in the per-cpu struct. */
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data->psci_states = psci_states;
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return 0;
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free_mem:
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kfree(psci_states);
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return ret;
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}
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static __init int psci_cpu_init_idle(struct cpuidle_driver *drv,
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unsigned int cpu, unsigned int state_count)
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{
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struct device_node *cpu_node;
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int ret;
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/*
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* If the PSCI cpu_suspend function hook has not been initialized
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* idle states must not be enabled, so bail out
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*/
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if (!psci_ops.cpu_suspend)
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return -EOPNOTSUPP;
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cpu_node = of_cpu_device_node_get(cpu);
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if (!cpu_node)
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return -ENODEV;
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ret = psci_dt_cpu_init_idle(drv, cpu_node, state_count, cpu);
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of_node_put(cpu_node);
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return ret;
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}
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static int __init psci_idle_init_cpu(int cpu)
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{
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struct cpuidle_driver *drv;
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struct device_node *cpu_node;
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const char *enable_method;
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int ret = 0;
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cpu_node = of_cpu_device_node_get(cpu);
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if (!cpu_node)
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return -ENODEV;
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/*
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* Check whether the enable-method for the cpu is PSCI, fail
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* if it is not.
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*/
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enable_method = of_get_property(cpu_node, "enable-method", NULL);
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if (!enable_method || (strcmp(enable_method, "psci")))
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ret = -ENODEV;
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of_node_put(cpu_node);
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if (ret)
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return ret;
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drv = kmemdup(&psci_idle_driver, sizeof(*drv), GFP_KERNEL);
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if (!drv)
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return -ENOMEM;
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drv->cpumask = (struct cpumask *)cpumask_of(cpu);
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/*
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* Initialize idle states data, starting at index 1, since
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* by default idle state 0 is the quiescent state reached
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* by the cpu by executing the wfi instruction.
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*
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* If no DT idle states are detected (ret == 0) let the driver
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* initialization fail accordingly since there is no reason to
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* initialize the idle driver if only wfi is supported, the
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* default archictectural back-end already executes wfi
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* on idle entry.
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*/
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ret = dt_init_idle_driver(drv, psci_idle_state_match, 1);
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if (ret <= 0) {
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ret = ret ? : -ENODEV;
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goto out_kfree_drv;
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}
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/*
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* Initialize PSCI idle states.
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*/
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ret = psci_cpu_init_idle(drv, cpu, ret);
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if (ret) {
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pr_err("CPU %d failed to PSCI idle\n", cpu);
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goto out_kfree_drv;
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}
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ret = cpuidle_register(drv, NULL);
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if (ret)
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goto out_kfree_drv;
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cpuidle_cooling_register(drv);
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return 0;
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out_kfree_drv:
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kfree(drv);
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return ret;
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}
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/*
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* psci_idle_init - Initializes PSCI cpuidle driver
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*
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* Initializes PSCI cpuidle driver for all CPUs, if any CPU fails
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* to register cpuidle driver then rollback to cancel all CPUs
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* registration.
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*/
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static int __init psci_idle_init(void)
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{
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int cpu, ret;
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struct cpuidle_driver *drv;
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struct cpuidle_device *dev;
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for_each_possible_cpu(cpu) {
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ret = psci_idle_init_cpu(cpu);
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if (ret)
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goto out_fail;
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}
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psci_idle_init_cpuhp();
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return 0;
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out_fail:
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while (--cpu >= 0) {
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dev = per_cpu(cpuidle_devices, cpu);
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drv = cpuidle_get_cpu_driver(dev);
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cpuidle_unregister(drv);
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kfree(drv);
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}
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return ret;
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}
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device_initcall(psci_idle_init);
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