diff options
Diffstat (limited to 'drivers/cpufreq/powernow-k8.c')
| -rw-r--r-- | drivers/cpufreq/powernow-k8.c | 46 |
1 files changed, 19 insertions, 27 deletions
diff --git a/drivers/cpufreq/powernow-k8.c b/drivers/cpufreq/powernow-k8.c index fb77b39a4ce3..f7512b4e923e 100644 --- a/drivers/cpufreq/powernow-k8.c +++ b/drivers/cpufreq/powernow-k8.c @@ -1,8 +1,6 @@ +// SPDX-License-Identifier: GPL-2.0-only /* * (c) 2003-2012 Advanced Micro Devices, Inc. - * Your use of this code is subject to the terms and conditions of the - * GNU general public license version 2. See "COPYING" or - * http://www.gnu.org/licenses/gpl.html * * Maintainer: * Andreas Herrmann <herrmann.der.user@googlemail.com> @@ -11,7 +9,6 @@ * (C) 2003 Dave Jones on behalf of SuSE Labs * (C) 2004 Dominik Brodowski <linux@brodo.de> * (C) 2004 Pavel Machek <pavel@ucw.cz> - * Licensed under the terms of the GNU GPL License version 2. * Based upon datasheets & sample CPUs kindly provided by AMD. * * Valuable input gratefully received from Dave Jones, Pavel Machek, @@ -89,7 +86,7 @@ static u32 convert_fid_to_vco_fid(u32 fid) */ static int pending_bit_stuck(void) { - u32 lo, hi; + u32 lo, hi __always_unused; rdmsr(MSR_FIDVID_STATUS, lo, hi); return lo & MSR_S_LO_CHANGE_PENDING ? 1 : 0; @@ -285,7 +282,7 @@ static int core_voltage_pre_transition(struct powernow_k8_data *data, { u32 rvosteps = data->rvo; u32 savefid = data->currfid; - u32 maxvid, lo, rvomult = 1; + u32 maxvid, lo __always_unused, rvomult = 1; pr_debug("ph1 (cpu%d): start, currfid 0x%x, currvid 0x%x, reqvid 0x%x, rvo 0x%x\n", smp_processor_id(), @@ -455,7 +452,7 @@ static int core_voltage_post_transition(struct powernow_k8_data *data, static const struct x86_cpu_id powernow_k8_ids[] = { /* IO based frequency switching */ - { X86_VENDOR_AMD, 0xf }, + X86_MATCH_VENDOR_FAM(AMD, 0xf, NULL), {} }; MODULE_DEVICE_TABLE(x86cpu, powernow_k8_ids); @@ -485,7 +482,7 @@ static void check_supported_cpu(void *_rc) cpuid(CPUID_FREQ_VOLT_CAPABILITIES, &eax, &ebx, &ecx, &edx); if ((edx & P_STATE_TRANSITION_CAPABLE) != P_STATE_TRANSITION_CAPABLE) { - pr_info("Power state transitions not supported\n"); + pr_info_once("Power state transitions not supported\n"); return; } *rc = 0; @@ -881,9 +878,9 @@ static int get_transition_latency(struct powernow_k8_data *data) /* Take a frequency, and issue the fid/vid transition command */ static int transition_frequency_fidvid(struct powernow_k8_data *data, - unsigned int index) + unsigned int index, + struct cpufreq_policy *policy) { - struct cpufreq_policy *policy; u32 fid = 0; u32 vid = 0; int res; @@ -915,9 +912,6 @@ static int transition_frequency_fidvid(struct powernow_k8_data *data, freqs.old = find_khz_freq_from_fid(data->currfid); freqs.new = find_khz_freq_from_fid(fid); - policy = cpufreq_cpu_get(smp_processor_id()); - cpufreq_cpu_put(policy); - cpufreq_freq_transition_begin(policy, &freqs); res = transition_fid_vid(data, fid, vid); cpufreq_freq_transition_end(policy, &freqs, res); @@ -972,7 +966,7 @@ static long powernowk8_target_fn(void *arg) powernow_k8_acpi_pst_values(data, newstate); - ret = transition_frequency_fidvid(data, newstate); + ret = transition_frequency_fidvid(data, newstate, pol); if (ret) { pr_err("transition frequency failed\n"); @@ -1095,22 +1089,21 @@ err_out: return -ENODEV; } -static int powernowk8_cpu_exit(struct cpufreq_policy *pol) +static void powernowk8_cpu_exit(struct cpufreq_policy *pol) { struct powernow_k8_data *data = per_cpu(powernow_data, pol->cpu); int cpu; if (!data) - return -EINVAL; + return; powernow_k8_cpu_exit_acpi(data); kfree(data->powernow_table); kfree(data); - for_each_cpu(cpu, pol->cpus) + /* pol->cpus will be empty here, use related_cpus instead. */ + for_each_cpu(cpu, pol->related_cpus) per_cpu(powernow_data, cpu) = NULL; - - return 0; } static void query_values_on_cpu(void *_err) @@ -1150,7 +1143,6 @@ static struct cpufreq_driver cpufreq_amd64_driver = { .exit = powernowk8_cpu_exit, .get = powernowk8_get, .name = "powernow-k8", - .attr = cpufreq_generic_attr, }; static void __request_acpi_cpufreq(void) @@ -1178,15 +1170,15 @@ static int powernowk8_init(void) unsigned int i, supported_cpus = 0; int ret; - if (static_cpu_has(X86_FEATURE_HW_PSTATE)) { - __request_acpi_cpufreq(); + if (!x86_match_cpu(powernow_k8_ids)) return -ENODEV; - } - if (!x86_match_cpu(powernow_k8_ids)) + if (boot_cpu_has(X86_FEATURE_HW_PSTATE)) { + __request_acpi_cpufreq(); return -ENODEV; + } - get_online_cpus(); + cpus_read_lock(); for_each_online_cpu(i) { smp_call_function_single(i, check_supported_cpu, &ret, 1); if (!ret) @@ -1194,10 +1186,10 @@ static int powernowk8_init(void) } if (supported_cpus != num_online_cpus()) { - put_online_cpus(); + cpus_read_unlock(); return -ENODEV; } - put_online_cpus(); + cpus_read_unlock(); ret = cpufreq_register_driver(&cpufreq_amd64_driver); if (ret) |