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| author | Huisung Kang <hs1218.kang@samsung.com> | 2011-06-24 16:04:13 +0900 |
|---|---|---|
| committer | Dave Jones <davej@redhat.com> | 2011-07-13 18:29:56 -0400 |
| commit | 90d5d0a119bcf189e8b33f776b4f8371b789b311 (patch) | |
| tree | efe34663dceea4f2a004df8e781e7eb699b85790 /drivers/cpufreq/s5pv210-cpufreq.c | |
| parent | fb3b1fefaaccdbdc716db0963ba41fb6b4221e60 (diff) | |
| download | lwn-90d5d0a119bcf189e8b33f776b4f8371b789b311.tar.gz lwn-90d5d0a119bcf189e8b33f776b4f8371b789b311.zip | |
[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>
Diffstat (limited to 'drivers/cpufreq/s5pv210-cpufreq.c')
| -rw-r--r-- | drivers/cpufreq/s5pv210-cpufreq.c | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/drivers/cpufreq/s5pv210-cpufreq.c b/drivers/cpufreq/s5pv210-cpufreq.c index a7cb3385bf5e..48a4a9058864 100644 --- a/drivers/cpufreq/s5pv210-cpufreq.c +++ b/drivers/cpufreq/s5pv210-cpufreq.c @@ -30,6 +30,18 @@ static struct cpufreq_freqs freqs; #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, |