From 90d5d0a119bcf189e8b33f776b4f8371b789b311 Mon Sep 17 00:00:00 2001 From: Huisung Kang Date: Fri, 24 Jun 2011 16:04:13 +0900 Subject: [PATCH] [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 Signed-off-by: Jonghwan Choi Signed-off-by: Kukjin Kim Signed-off-by: Dave Jones --- drivers/cpufreq/s5pv210-cpufreq.c | 28 ++++++++++++++++++++++++++++ 1 file changed, 28 insertions(+) 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 @@ -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, -- 2.20.1