[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>

[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>
Huisung Kang · Dave Jones
1 parent fb3b1fefaa
Showing 1 changed file with 28 additions and 0 deletions Side-by-side Diff
drivers/cpufreq/s5pv210-cpufreq.c
@@ -30,6 +30,18 @@
 #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.
  */
@@ -145,6 +157,22 @@
 	unsigned int index, priv_index;
 	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);
...	...	@@ -30,6 +30,18 @@
30	30	#define APLL_VAL_800 ((1 << 31) \| (100 << 16) \| (3 << 8) \| 1)
31	31
32	32	/*
	33	+ * relation has an additional symantics other than the standard of cpufreq
	34	+ * DISALBE_FURTHER_CPUFREQ: disable further access to target
	35	+ * ENABLE_FURTUER_CPUFREQ: enable access to target
	36	+ */
	37	+enum cpufreq_access {
	38	+ DISABLE_FURTHER_CPUFREQ = 0x10,
	39	+ ENABLE_FURTHER_CPUFREQ = 0x20,
	40	+};
	41	+
	42	+static bool no_cpufreq_access;
	43	+
	44	+/*
33	45	* DRAM configurations to calculate refresh counter for changing
34	46	* frequency of memory.
35	47	*/
...	...	@@ -145,6 +157,22 @@
145	157	unsigned int index, priv_index;
146	158	unsigned int pll_changing = 0;
147	159	unsigned int bus_speed_changing = 0;
	160	+
	161	+ if (relation & ENABLE_FURTHER_CPUFREQ)
	162	+ no_cpufreq_access = false;
	163	+
	164	+ if (no_cpufreq_access) {
	165	+#ifdef CONFIG_PM_VERBOSE
	166	+ pr_err("%s:%d denied access to %s as it is disabled"
	167	+ "temporarily\n", __FILE__, __LINE__, __func__);
	168	+#endif
	169	+ return -EINVAL;
	170	+ }
	171	+
	172	+ if (relation & DISABLE_FURTHER_CPUFREQ)
	173	+ no_cpufreq_access = true;
	174	+
	175	+ relation &= ~(ENABLE_FURTHER_CPUFREQ \| DISABLE_FURTHER_CPUFREQ);
148	176
149	177	freqs.old = s5pv210_getspeed(0);
150	178