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Commit 90d5d0a1 authored by Huisung Kang's avatar Huisung Kang Committed by Dave Jones
Browse files

[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: default avatarHuisung Kang <hs1218.kang@samsung.com>
Signed-off-by: default avatarJonghwan Choi <jhbird.choi@samsung.com>
Signed-off-by: default avatarKukjin Kim <kgene.kim@samsung.com>
Signed-off-by: default avatarDave Jones <davej@redhat.com>
parent fb3b1fef

drivers/cpufreq/s5pv210-cpufreq.c

+28 −0
Original line number Diff line number Diff line
@@ -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,