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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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b73b5c493a
The following commits break cpuidle on SH-Mobile ARM:46bcfadcpuidle: Single/Global registration of idle statese978aa7cpuidle: Move dev->last_residency update to driver enter routine; remove dev->last_state This patch remedies these issues by up-porting the SH-Mobile code to fit with the above introduced framework changes. It is worth noting that the new code becomes significantly cleaner, so these framework changes are very welcome. At the same time this breakage could probably have been avoided by grepping for "last_state" and "cpuidle_register_driver". Signed-off-by: Magnus Damm <damm@opensource.se> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
87 lines
1.8 KiB
C
87 lines
1.8 KiB
C
/*
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* CPUIdle support code for SH-Mobile ARM
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*
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* Copyright (C) 2011 Magnus Damm
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*
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file "COPYING" in the main directory of this archive
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* for more details.
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*/
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#include <linux/pm.h>
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#include <linux/cpuidle.h>
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#include <linux/suspend.h>
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#include <linux/module.h>
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#include <linux/err.h>
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#include <asm/system.h>
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#include <asm/io.h>
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static void shmobile_enter_wfi(void)
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{
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cpu_do_idle();
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}
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void (*shmobile_cpuidle_modes[CPUIDLE_STATE_MAX])(void) = {
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shmobile_enter_wfi, /* regular sleep mode */
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};
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static int shmobile_cpuidle_enter(struct cpuidle_device *dev,
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struct cpuidle_driver *drv,
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int index)
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{
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ktime_t before, after;
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before = ktime_get();
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local_irq_disable();
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local_fiq_disable();
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shmobile_cpuidle_modes[index]();
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local_irq_enable();
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local_fiq_enable();
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after = ktime_get();
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dev->last_residency = ktime_to_ns(ktime_sub(after, before)) >> 10;
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return index;
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}
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static struct cpuidle_device shmobile_cpuidle_dev;
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static struct cpuidle_driver shmobile_cpuidle_driver = {
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.name = "shmobile_cpuidle",
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.owner = THIS_MODULE,
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.states[0] = {
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.name = "C1",
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.desc = "WFI",
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.exit_latency = 1,
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.target_residency = 1 * 2,
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.flags = CPUIDLE_FLAG_TIME_VALID,
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},
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.safe_state_index = 0, /* C1 */
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.state_count = 1,
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};
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void (*shmobile_cpuidle_setup)(struct cpuidle_driver *drv);
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static int shmobile_cpuidle_init(void)
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{
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struct cpuidle_device *dev = &shmobile_cpuidle_dev;
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struct cpuidle_driver *drv = &shmobile_cpuidle_driver;
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int i;
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for (i = 0; i < CPUIDLE_STATE_MAX; i++)
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drv->states[i].enter = shmobile_cpuidle_enter;
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if (shmobile_cpuidle_setup)
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shmobile_cpuidle_setup(drv);
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cpuidle_register_driver(drv);
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dev->state_count = drv->state_count;
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cpuidle_register_device(dev);
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return 0;
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}
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late_initcall(shmobile_cpuidle_init);
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