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[CPUFREQ] S5PV210: Add additional symantics for "relation" in cpufreq with pm 

Relation has an additional symantics other than standard.
s5pv310_target funtion have below additional relation.
- DISABLE_FURTHER_CPUFREQ : disable further access to target
- ENABLE_FURTHER_CPUFRER : enable access to target

Signed-off-by: Huisung Kang <hs1218.kang@samsung.com>
Signed-off-by: Jonghwan Choi <jhbird.choi@samsung.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
Signed-off-by: Dave Jones <davej@redhat.com>
This commit is contained in:
Huisung Kang 2011-06-24 16:04:13 +09:00 committed by Dave Jones
parent fb3b1fefaa
commit 90d5d0a119
1 changed files with 28 additions and 0 deletions
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28
drivers/cpufreq/s5pv210-cpufreq.c
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@ -29,6 +29,18 @@ static struct cpufreq_freqs freqs;
#define APLL_VAL_1000 ((1 << 31) | (125 << 16) | (3 << 8) | 1)
#define APLL_VAL_800 ((1 << 31) | (100 << 16) | (3 << 8) | 1)
/*
* relation has an additional symantics other than the standard of cpufreq
* DISALBE_FURTHER_CPUFREQ: disable further access to target
* ENABLE_FURTUER_CPUFREQ: enable access to target
*/
enum cpufreq_access {
DISABLE_FURTHER_CPUFREQ = 0x10,
ENABLE_FURTHER_CPUFREQ = 0x20,
};
static bool no_cpufreq_access;
/*
* DRAM configurations to calculate refresh counter for changing
* frequency of memory.
@ -146,6 +158,22 @@ static int s5pv210_target(struct cpufreq_policy *policy,
unsigned int pll_changing = 0;
unsigned int bus_speed_changing = 0;
if (relation & ENABLE_FURTHER_CPUFREQ)
no_cpufreq_access = false;
if (no_cpufreq_access) {
#ifdef CONFIG_PM_VERBOSE
pr_err("%s:%d denied access to %s as it is disabled"
"temporarily\n", __FILE__, __LINE__, __func__);
#endif
return -EINVAL;
}
if (relation & DISABLE_FURTHER_CPUFREQ)
no_cpufreq_access = true;
relation &= ~(ENABLE_FURTHER_CPUFREQ | DISABLE_FURTHER_CPUFREQ);
freqs.old = s5pv210_getspeed(0);
if (cpufreq_frequency_table_target(policy, s5pv210_freq_table,