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| author |   Ulf Hansson <ulf.hansson@linaro.org> | 2012-10-10 13:42:29 +0200 |
|---|---|---|
| committer |   Mike Turquette <mturquette@ti.com> | 2012-11-09 16:47:07 -0800 |
| commit | 78e30d12168b540d426e4584b3d485e80fbc2a51 (patch) | |
| tree | 50d6dbeacec8f02f3db3de183ccc6a32f5af4acf | |
| parent | clk: ux500: Add armss clk and fixup smp_twd clk for u8500 (diff) | |
| download | linux-dev-78e30d12168b540d426e4584b3d485e80fbc2a51.tar.xz linux-dev-78e30d12168b540d426e4584b3d485e80fbc2a51.zip | |
cpufreq: db8500: Use armss clk to update frequency
Using the armss clk to update the frequency makes the driver no more
directly dependant on the prmcu API.
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Cc: Rafael J. Wysocki <rjw@sisk.pl>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Mike Turquette <mturquette@linaro.org>
| -rw-r--r-- | drivers/cpufreq/db8500-cpufreq.c | 24 |
1 files changed, 16 insertions, 8 deletions
diff --git a/drivers/cpufreq/db8500-cpufreq.c b/drivers/cpufreq/db8500-cpufreq.c index dea9a49023d7..4f154bc0ebe4 100644 --- a/drivers/cpufreq/db8500-cpufreq.c +++ b/drivers/cpufreq/db8500-cpufreq.c @@ -14,10 +14,11 @@ #include <linux/delay.h> #include <linux/slab.h> #include <linux/platform_device.h> -#include <linux/mfd/dbx500-prcmu.h> +#include <linux/clk.h> #include <mach/id.h> static struct cpufreq_frequency_table *freq_table; +static struct clk *armss_clk; static struct freq_attr *db8500_cpufreq_attr[] = { &cpufreq_freq_attr_scaling_available_freqs, @@ -58,9 +59,9 @@ static int db8500_cpufreq_target(struct cpufreq_policy *policy, for_each_cpu(freqs.cpu, policy->cpus) cpufreq_notify_transition(&freqs, CPUFREQ_PRECHANGE); - /* request the PRCM unit for opp change */ - if (prcmu_set_arm_opp(freq_table[idx].index)) { - pr_err("db8500-cpufreq: Failed to set OPP level\n"); + /* 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; } @@ -74,16 +75,16 @@ static int db8500_cpufreq_target(struct cpufreq_policy *policy, static unsigned int db8500_cpufreq_getspeed(unsigned int cpu) { int i = 0; - /* request the prcm to get the current ARM opp */ - int opp = prcmu_get_arm_opp(); + unsigned long freq = clk_get_rate(armss_clk) / 1000; while (freq_table[i].frequency != CPUFREQ_TABLE_END) { - if (opp == freq_table[i].index) + if (freq <= freq_table[i].frequency) return freq_table[i].frequency; i++; } - /* We could not find a corresponding opp frequency. */ + /* We could not find a corresponding frequency. */ + pr_err("db8500-cpufreq: Failed to find cpufreq speed\n"); return 0; } @@ -92,6 +93,12 @@ static int __cpuinit db8500_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); @@ -104,6 +111,7 @@ static int __cpuinit db8500_cpufreq_init(struct cpufreq_policy *policy) cpufreq_frequency_table_get_attr(freq_table, policy->cpu); else { pr_err("db8500-cpufreq : Failed to read policy table\n"); + clk_put(armss_clk); return res; } |