diff options
Diffstat (limited to 'drivers/cpufreq')
| -rw-r--r-- | drivers/cpufreq/Makefile | 2 | ||||
| -rw-r--r-- | drivers/cpufreq/dbx500-cpufreq.c (renamed from drivers/cpufreq/db8500-cpufreq.c) | 101 |
2 files changed, 52 insertions, 51 deletions
diff --git a/drivers/cpufreq/Makefile b/drivers/cpufreq/Makefile index fadc4d4..030ba95 100644 --- a/drivers/cpufreq/Makefile +++ b/drivers/cpufreq/Makefile @@ -42,7 +42,7 @@ obj-$(CONFIG_X86_CPUFREQ_NFORCE2) += cpufreq-nforce2.o ################################################################################## # ARM SoC drivers -obj-$(CONFIG_UX500_SOC_DB8500) += db8500-cpufreq.o +obj-$(CONFIG_UX500_SOC_DB8500) += dbx500-cpufreq.o obj-$(CONFIG_ARM_S3C2416_CPUFREQ) += s3c2416-cpufreq.o obj-$(CONFIG_ARM_S3C64XX_CPUFREQ) += s3c64xx-cpufreq.o obj-$(CONFIG_ARM_S5PV210_CPUFREQ) += s5pv210-cpufreq.o diff --git a/drivers/cpufreq/db8500-cpufreq.c b/drivers/cpufreq/dbx500-cpufreq.c index 4f154bc..9a62375 100644 --- a/drivers/cpufreq/db8500-cpufreq.c +++ b/drivers/cpufreq/dbx500-cpufreq.c @@ -1,13 +1,13 @@ /* * Copyright (C) STMicroelectronics 2009 - * Copyright (C) ST-Ericsson SA 2010 + * Copyright (C) ST-Ericsson SA 2010-2012 * * License Terms: GNU General Public License v2 * Author: Sundar Iyer <sundar.iyer@stericsson.com> * Author: Martin Persson <martin.persson@stericsson.com> * Author: Jonas Aaberg <jonas.aberg@stericsson.com> - * */ + #include <linux/module.h> #include <linux/kernel.h> #include <linux/cpufreq.h> @@ -20,22 +20,23 @@ static struct cpufreq_frequency_table *freq_table; static struct clk *armss_clk; -static struct freq_attr *db8500_cpufreq_attr[] = { +static struct freq_attr *dbx500_cpufreq_attr[] = { &cpufreq_freq_attr_scaling_available_freqs, NULL, }; -static int db8500_cpufreq_verify_speed(struct cpufreq_policy *policy) +static int dbx500_cpufreq_verify_speed(struct cpufreq_policy *policy) { return cpufreq_frequency_table_verify(policy, freq_table); } -static int db8500_cpufreq_target(struct cpufreq_policy *policy, +static int dbx500_cpufreq_target(struct cpufreq_policy *policy, unsigned int target_freq, unsigned int relation) { struct cpufreq_freqs freqs; unsigned int idx; + int ret; /* scale the target frequency to one of the extremes supported */ if (target_freq < policy->cpuinfo.min_freq) @@ -44,10 +45,9 @@ static int db8500_cpufreq_target(struct cpufreq_policy *policy, target_freq = policy->cpuinfo.max_freq; /* Lookup the next frequency */ - if (cpufreq_frequency_table_target - (policy, freq_table, target_freq, relation, &idx)) { + if (cpufreq_frequency_table_target(policy, freq_table, target_freq, + relation, &idx)) return -EINVAL; - } freqs.old = policy->cur; freqs.new = freq_table[idx].frequency; @@ -60,9 +60,12 @@ static int db8500_cpufreq_target(struct cpufreq_policy *policy, cpufreq_notify_transition(&freqs, CPUFREQ_PRECHANGE); /* update armss clk frequency */ - if (clk_set_rate(armss_clk, freq_table[idx].frequency * 1000)) { - pr_err("db8500-cpufreq: Failed to update armss clk\n"); - return -EINVAL; + ret = clk_set_rate(armss_clk, freqs.new * 1000); + + if (ret) { + pr_err("dbx500-cpufreq: Failed to set armss_clk to %d Hz: error %d\n", + freqs.new * 1000, ret); + return ret; } /* post change notification */ @@ -72,7 +75,7 @@ static int db8500_cpufreq_target(struct cpufreq_policy *policy, return 0; } -static unsigned int db8500_cpufreq_getspeed(unsigned int cpu) +static unsigned int dbx500_cpufreq_getspeed(unsigned int cpu) { int i = 0; unsigned long freq = clk_get_rate(armss_clk) / 1000; @@ -84,40 +87,26 @@ static unsigned int db8500_cpufreq_getspeed(unsigned int cpu) } /* We could not find a corresponding frequency. */ - pr_err("db8500-cpufreq: Failed to find cpufreq speed\n"); + pr_err("dbx500-cpufreq: Failed to find cpufreq speed\n"); return 0; } -static int __cpuinit db8500_cpufreq_init(struct cpufreq_policy *policy) +static int __cpuinit dbx500_cpufreq_init(struct cpufreq_policy *policy) { - int i = 0; int res; - armss_clk = clk_get(NULL, "armss"); - if (IS_ERR(armss_clk)) { - pr_err("db8500-cpufreq : Failed to get armss clk\n"); - return PTR_ERR(armss_clk); - } - - pr_info("db8500-cpufreq : Available frequencies:\n"); - while (freq_table[i].frequency != CPUFREQ_TABLE_END) { - pr_info(" %d Mhz\n", freq_table[i].frequency/1000); - i++; - } - /* get policy fields based on the table */ res = cpufreq_frequency_table_cpuinfo(policy, freq_table); if (!res) cpufreq_frequency_table_get_attr(freq_table, policy->cpu); else { - pr_err("db8500-cpufreq : Failed to read policy table\n"); - clk_put(armss_clk); + pr_err("dbx500-cpufreq: Failed to read policy table\n"); return res; } policy->min = policy->cpuinfo.min_freq; policy->max = policy->cpuinfo.max_freq; - policy->cur = db8500_cpufreq_getspeed(policy->cpu); + policy->cur = dbx500_cpufreq_getspeed(policy->cpu); policy->governor = CPUFREQ_DEFAULT_GOVERNOR; /* @@ -135,45 +124,57 @@ static int __cpuinit db8500_cpufreq_init(struct cpufreq_policy *policy) return 0; } -static struct cpufreq_driver db8500_cpufreq_driver = { - .flags = CPUFREQ_STICKY, - .verify = db8500_cpufreq_verify_speed, - .target = db8500_cpufreq_target, - .get = db8500_cpufreq_getspeed, - .init = db8500_cpufreq_init, - .name = "DB8500", - .attr = db8500_cpufreq_attr, +static struct cpufreq_driver dbx500_cpufreq_driver = { + .flags = CPUFREQ_STICKY | CPUFREQ_CONST_LOOPS, + .verify = dbx500_cpufreq_verify_speed, + .target = dbx500_cpufreq_target, + .get = dbx500_cpufreq_getspeed, + .init = dbx500_cpufreq_init, + .name = "DBX500", + .attr = dbx500_cpufreq_attr, }; -static int db8500_cpufreq_probe(struct platform_device *pdev) +static int dbx500_cpufreq_probe(struct platform_device *pdev) { - freq_table = dev_get_platdata(&pdev->dev); + int i = 0; + freq_table = dev_get_platdata(&pdev->dev); if (!freq_table) { - pr_err("db8500-cpufreq: Failed to fetch cpufreq table\n"); + pr_err("dbx500-cpufreq: Failed to fetch cpufreq table\n"); return -ENODEV; } - return cpufreq_register_driver(&db8500_cpufreq_driver); + armss_clk = clk_get(&pdev->dev, "armss"); + if (IS_ERR(armss_clk)) { + pr_err("dbx500-cpufreq: Failed to get armss clk\n"); + return PTR_ERR(armss_clk); + } + + pr_info("dbx500-cpufreq: Available frequencies:\n"); + while (freq_table[i].frequency != CPUFREQ_TABLE_END) { + pr_info(" %d Mhz\n", freq_table[i].frequency/1000); + i++; + } + + return cpufreq_register_driver(&dbx500_cpufreq_driver); } -static struct platform_driver db8500_cpufreq_plat_driver = { +static struct platform_driver dbx500_cpufreq_plat_driver = { .driver = { - .name = "cpufreq-u8500", + .name = "cpufreq-ux500", .owner = THIS_MODULE, }, - .probe = db8500_cpufreq_probe, + .probe = dbx500_cpufreq_probe, }; -static int __init db8500_cpufreq_register(void) +static int __init dbx500_cpufreq_register(void) { if (!cpu_is_u8500_family()) return -ENODEV; - pr_info("cpufreq for DB8500 started\n"); - return platform_driver_register(&db8500_cpufreq_plat_driver); + return platform_driver_register(&dbx500_cpufreq_plat_driver); } -device_initcall(db8500_cpufreq_register); +device_initcall(dbx500_cpufreq_register); MODULE_LICENSE("GPL v2"); -MODULE_DESCRIPTION("cpufreq driver for DB8500"); +MODULE_DESCRIPTION("cpufreq driver for DBX500"); |
