diff options
author | Linus Torvalds <torvalds@linux-foundation.org> | 2018-02-09 09:40:33 -0800 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2018-02-09 09:40:33 -0800 |
commit | a051c14b8db35cb269e9d91e11fc3573b6f7475d (patch) | |
tree | 35d603e7619b2a64d55fd9529519eac629b24173 /drivers/cpufreq/at32ap-cpufreq.c | |
parent | f1517df8701c9f12dae9ce7f43a5d300a6917619 (diff) | |
parent | 616f16093d852215f6a1188de1bafdc1f8892924 (diff) |
Merge tag 'pm-part2-4.16-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
Pull more power management updates from Rafael Wysocki:
"These are mostly fixes and cleanups and removal of the no longer
needed at32ap-cpufreq driver.
Specifics:
- Drop the at32ap-cpufreq driver which is useless after the removal
of the corresponding arch (Corentin LABBE).
- Fix a regression from the 4.14 cycle in the APM idle driver by
making it initialize the polling state properly (Rafael Wysocki).
- Fix a crash on failing system suspend due to a missing check in the
cpufreq core (Bo Yan).
- Make the intel_pstate driver initialize the hardware-managed
P-state control (HWP) feature on CPU0 upon resume from system
suspend if HWP had been enabled before the system was suspended
(Chen Yu).
- Fix up the SCPI cpufreq driver after recent changes (Sudeep Holla,
Wei Yongjun).
- Avoid pointer subtractions during frequency table walks in cpufreq
(Dominik Brodowski).
- Avoid the check for ProcFeedback in ST/CZ in the cpufreq driver for
AMD processors and add a MODULE_ALIAS for cpufreq on ARM IMX (Akshu
Agrawal, Nicolas Chauvet).
- Fix the prototype of swsusp_arch_resume() on x86 (Arnd Bergmann).
- Fix up the parsing of power domains DT data (Ulf Hansson)"
* tag 'pm-part2-4.16-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
arm: imx: Add MODULE_ALIAS for cpufreq
cpufreq: Add and use cpufreq_for_each_{valid_,}entry_idx()
cpufreq: intel_pstate: Enable HWP during system resume on CPU0
cpufreq: scpi: fix error return code in scpi_cpufreq_init()
x86: hibernate: fix swsusp_arch_resume() prototype
PM / domains: Fix up domain-idle-states OF parsing
cpufreq: scpi: fix static checker warning cdev isn't an ERR_PTR
cpufreq: remove at32ap-cpufreq
cpufreq: AMD: Ignore the check for ProcFeedback in ST/CZ
x86: PM: Make APM idle driver initialize polling state
cpufreq: Skip cpufreq resume if it's not suspended
Diffstat (limited to 'drivers/cpufreq/at32ap-cpufreq.c')
-rw-r--r-- | drivers/cpufreq/at32ap-cpufreq.c | 127 |
1 files changed, 0 insertions, 127 deletions
diff --git a/drivers/cpufreq/at32ap-cpufreq.c b/drivers/cpufreq/at32ap-cpufreq.c deleted file mode 100644 index 7b612c8bb09e..000000000000 --- a/drivers/cpufreq/at32ap-cpufreq.c +++ /dev/null @@ -1,127 +0,0 @@ -/* - * Copyright (C) 2004-2007 Atmel Corporation - * - * Based on MIPS implementation arch/mips/kernel/time.c - * Copyright 2001 MontaVista Software Inc. - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. - */ - -/*#define DEBUG*/ - -#include <linux/kernel.h> -#include <linux/types.h> -#include <linux/init.h> -#include <linux/cpufreq.h> -#include <linux/io.h> -#include <linux/clk.h> -#include <linux/err.h> -#include <linux/export.h> -#include <linux/slab.h> - -static struct cpufreq_frequency_table *freq_table; - -static unsigned int ref_freq; -static unsigned long loops_per_jiffy_ref; - -static int at32_set_target(struct cpufreq_policy *policy, unsigned int index) -{ - unsigned int old_freq, new_freq; - - old_freq = policy->cur; - new_freq = freq_table[index].frequency; - - if (!ref_freq) { - ref_freq = old_freq; - loops_per_jiffy_ref = boot_cpu_data.loops_per_jiffy; - } - - if (old_freq < new_freq) - boot_cpu_data.loops_per_jiffy = cpufreq_scale( - loops_per_jiffy_ref, ref_freq, new_freq); - clk_set_rate(policy->clk, new_freq * 1000); - if (new_freq < old_freq) - boot_cpu_data.loops_per_jiffy = cpufreq_scale( - loops_per_jiffy_ref, ref_freq, new_freq); - - return 0; -} - -static int at32_cpufreq_driver_init(struct cpufreq_policy *policy) -{ - unsigned int frequency, rate, min_freq; - struct clk *cpuclk; - int retval, steps, i; - - if (policy->cpu != 0) - return -EINVAL; - - cpuclk = clk_get(NULL, "cpu"); - if (IS_ERR(cpuclk)) { - pr_debug("cpufreq: could not get CPU clk\n"); - retval = PTR_ERR(cpuclk); - goto out_err; - } - - min_freq = (clk_round_rate(cpuclk, 1) + 500) / 1000; - frequency = (clk_round_rate(cpuclk, ~0UL) + 500) / 1000; - policy->cpuinfo.transition_latency = 0; - - /* - * AVR32 CPU frequency rate scales in power of two between maximum and - * minimum, also add space for the table end marker. - * - * Further validate that the frequency is usable, and append it to the - * frequency table. - */ - steps = fls(frequency / min_freq) + 1; - freq_table = kzalloc(steps * sizeof(struct cpufreq_frequency_table), - GFP_KERNEL); - if (!freq_table) { - retval = -ENOMEM; - goto out_err_put_clk; - } - - for (i = 0; i < (steps - 1); i++) { - rate = clk_round_rate(cpuclk, frequency * 1000) / 1000; - - if (rate != frequency) - freq_table[i].frequency = CPUFREQ_ENTRY_INVALID; - else - freq_table[i].frequency = frequency; - - frequency /= 2; - } - - policy->clk = cpuclk; - freq_table[steps - 1].frequency = CPUFREQ_TABLE_END; - - retval = cpufreq_table_validate_and_show(policy, freq_table); - if (!retval) { - printk("cpufreq: AT32AP CPU frequency driver\n"); - return 0; - } - - kfree(freq_table); -out_err_put_clk: - clk_put(cpuclk); -out_err: - return retval; -} - -static struct cpufreq_driver at32_driver = { - .name = "at32ap", - .init = at32_cpufreq_driver_init, - .verify = cpufreq_generic_frequency_table_verify, - .target_index = at32_set_target, - .get = cpufreq_generic_get, - .flags = CPUFREQ_STICKY, -}; - -static int __init at32_cpufreq_init(void) -{ - return cpufreq_register_driver(&at32_driver); -} -late_initcall(at32_cpufreq_init); |