--- drivers/cpufreq/cpufreq.c
+++ drivers/cpufreq/cpufreq.c
@@ -619,6 +619,68 @@ static ssize_t show_bios_limit(struct cp
return sprintf(buf, "%u\n", policy->cpuinfo.max_freq);
}
+#ifdef CONFIG_CPU_VOLTAGE_TABLE
+
+extern ssize_t acpuclk_get_vdd_levels_str(char *buf);
+extern void acpuclk_set_vdd(unsigned acpu_khz, int vdd);
+
+static ssize_t show_vdd_levels(struct kobject *a, struct attribute *b, char *buf) {
+ return acpuclk_get_vdd_levels_str(buf);
+}
+
+static ssize_t store_vdd_levels(struct kobject *a, struct attribute *b, const char *buf, size_t count) {
+
+ int i = 0, j;
+ int pair[2] = { 0, 0 };
+ int sign = 0;
+
+ if (count < 1)
+ return 0;
+
+ if (buf[0] == '-') {
+ sign = -1;
+ i++;
+ }
+ else if (buf[0] == '+') {
+ sign = 1;
+ i++;
+ }
+
+ for (j = 0; i < count; i++) {
+
+ char c = buf[i];
+
+ if ((c >= '0') && (c <= '9')) {
+ pair[j] *= 10;
+ pair[j] += (c - '0');
+ }
+ else if ((c == ' ') || (c == '\t')) {
+ if (pair[j] != 0) {
+ j++;
+
+ if ((sign != 0) || (j > 1))
+ break;
+ }
+ }
+ else
+ break;
+ }
+
+ if (sign != 0) {
+ if (pair[0] > 0)
+ acpuclk_set_vdd(0, sign * pair[0]);
+ }
+ else {
+ if ((pair[0] > 0) && (pair[1] > 0))
+ acpuclk_set_vdd((unsigned)pair[0], pair[1]);
+ else
+ return -EINVAL;
+ }
+ return count;
+}
+
+#endif /* CONFIG_CPU_VOLTAGE_TABLE */
+
cpufreq_freq_attr_ro_perm(cpuinfo_cur_freq, 0400);
cpufreq_freq_attr_ro(cpuinfo_min_freq);
cpufreq_freq_attr_ro(cpuinfo_max_freq);
@@ -634,6 +696,9 @@ cpufreq_freq_attr_rw(scaling_min_freq);
cpufreq_freq_attr_rw(scaling_max_freq);
cpufreq_freq_attr_rw(scaling_governor);
cpufreq_freq_attr_rw(scaling_setspeed);
+#ifdef CONFIG_CPU_VOLTAGE_TABLE
+define_one_global_rw(vdd_levels);
+#endif
static struct attribute *default_attrs[] = {
&cpuinfo_min_freq.attr,
@@ -651,6 +716,18 @@ static struct attribute *default_attrs[]
NULL
};
+#ifdef CONFIG_CPU_VOLTAGE_TABLE
+static struct attribute *vddtbl_attrs[] = {
+ &vdd_levels.attr,
+ NULL
+};
+
+static struct attribute_group vddtbl_attr_group = {
+ .attrs = vddtbl_attrs,
+ .name = "vdd_table",
+};
+#endif /* CONFIG_CPU_VOLTAGE_TABLE */
+
struct kobject *cpufreq_global_kobject;
EXPORT_SYMBOL(cpufreq_global_kobject);
@@ -2009,6 +2086,9 @@ EXPORT_SYMBOL_GPL(cpufreq_unregister_dri
static int __init cpufreq_core_init(void)
{
int cpu;
+#ifdef CONFIG_CPU_VOLTAGE_TABLE
+ int rc;
+#endif /* CONFIG_CPU_VOLTAGE_TABLE */
if (cpufreq_disabled())
return -ENODEV;
@@ -2021,6 +2101,9 @@ static int __init cpufreq_core_init(void
cpufreq_global_kobject = kobject_create_and_add("cpufreq", &cpu_subsys.dev_root->kobj);
BUG_ON(!cpufreq_global_kobject);
register_syscore_ops(&cpufreq_syscore_ops);
+#ifdef CONFIG_CPU_VOLTAGE_TABLE
+ rc = sysfs_create_group(cpufreq_global_kobject, &vddtbl_attr_group);
+#endif /* CONFIG_CPU_VOLTAGE_TABLE */
return 0;
}
projects / ziggy471-sgs4-jb.git / blobdiff