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path: root/drivers/platform/mips/cpu_hwmon.c
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Diffstat (limited to 'drivers/platform/mips/cpu_hwmon.c')
-rw-r--r--drivers/platform/mips/cpu_hwmon.c136
1 files changed, 71 insertions, 65 deletions
diff --git a/drivers/platform/mips/cpu_hwmon.c b/drivers/platform/mips/cpu_hwmon.c
index 4300a558d0f3..322de58eebaf 100644
--- a/drivers/platform/mips/cpu_hwmon.c
+++ b/drivers/platform/mips/cpu_hwmon.c
@@ -17,17 +17,27 @@
*/
int loongson3_cpu_temp(int cpu)
{
- u32 reg;
+ u32 reg, prid_rev;
reg = LOONGSON_CHIPTEMP(cpu);
- if ((read_c0_prid() & PRID_REV_MASK) == PRID_REV_LOONGSON3A_R1)
+ prid_rev = read_c0_prid() & PRID_REV_MASK;
+ switch (prid_rev) {
+ case PRID_REV_LOONGSON3A_R1:
reg = (reg >> 8) & 0xff;
- else
+ break;
+ case PRID_REV_LOONGSON3A_R2:
+ case PRID_REV_LOONGSON3B_R1:
+ case PRID_REV_LOONGSON3B_R2:
reg = ((reg >> 8) & 0xff) - 100;
-
+ break;
+ case PRID_REV_LOONGSON3A_R3:
+ reg = (reg & 0xffff)*731/0x4000 - 273;
+ break;
+ }
return (int)reg * 1000;
}
+static int nr_packages;
static struct device *cpu_hwmon_dev;
static ssize_t get_hwmon_name(struct device *dev,
@@ -51,88 +61,74 @@ static ssize_t get_hwmon_name(struct device *dev,
return sprintf(buf, "cpu-hwmon\n");
}
-static ssize_t get_cpu0_temp(struct device *dev,
- struct device_attribute *attr, char *buf);
-static ssize_t get_cpu1_temp(struct device *dev,
+static ssize_t get_cpu_temp(struct device *dev,
struct device_attribute *attr, char *buf);
-static ssize_t cpu0_temp_label(struct device *dev,
+static ssize_t cpu_temp_label(struct device *dev,
struct device_attribute *attr, char *buf);
-static ssize_t cpu1_temp_label(struct device *dev,
- struct device_attribute *attr, char *buf);
-
-static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, get_cpu0_temp, NULL, 1);
-static SENSOR_DEVICE_ATTR(temp1_label, S_IRUGO, cpu0_temp_label, NULL, 1);
-static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO, get_cpu1_temp, NULL, 2);
-static SENSOR_DEVICE_ATTR(temp2_label, S_IRUGO, cpu1_temp_label, NULL, 2);
-static const struct attribute *hwmon_cputemp1[] = {
- &sensor_dev_attr_temp1_input.dev_attr.attr,
- &sensor_dev_attr_temp1_label.dev_attr.attr,
- NULL
-};
-
-static const struct attribute *hwmon_cputemp2[] = {
- &sensor_dev_attr_temp2_input.dev_attr.attr,
- &sensor_dev_attr_temp2_label.dev_attr.attr,
- NULL
+static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, get_cpu_temp, NULL, 1);
+static SENSOR_DEVICE_ATTR(temp1_label, S_IRUGO, cpu_temp_label, NULL, 1);
+static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO, get_cpu_temp, NULL, 2);
+static SENSOR_DEVICE_ATTR(temp2_label, S_IRUGO, cpu_temp_label, NULL, 2);
+static SENSOR_DEVICE_ATTR(temp3_input, S_IRUGO, get_cpu_temp, NULL, 3);
+static SENSOR_DEVICE_ATTR(temp3_label, S_IRUGO, cpu_temp_label, NULL, 3);
+static SENSOR_DEVICE_ATTR(temp4_input, S_IRUGO, get_cpu_temp, NULL, 4);
+static SENSOR_DEVICE_ATTR(temp4_label, S_IRUGO, cpu_temp_label, NULL, 4);
+
+static const struct attribute *hwmon_cputemp[4][3] = {
+ {
+ &sensor_dev_attr_temp1_input.dev_attr.attr,
+ &sensor_dev_attr_temp1_label.dev_attr.attr,
+ NULL
+ },
+ {
+ &sensor_dev_attr_temp2_input.dev_attr.attr,
+ &sensor_dev_attr_temp2_label.dev_attr.attr,
+ NULL
+ },
+ {
+ &sensor_dev_attr_temp3_input.dev_attr.attr,
+ &sensor_dev_attr_temp3_label.dev_attr.attr,
+ NULL
+ },
+ {
+ &sensor_dev_attr_temp4_input.dev_attr.attr,
+ &sensor_dev_attr_temp4_label.dev_attr.attr,
+ NULL
+ }
};
-static ssize_t cpu0_temp_label(struct device *dev,
- struct device_attribute *attr, char *buf)
-{
- return sprintf(buf, "CPU 0 Temperature\n");
-}
-
-static ssize_t cpu1_temp_label(struct device *dev,
+static ssize_t cpu_temp_label(struct device *dev,
struct device_attribute *attr, char *buf)
{
- return sprintf(buf, "CPU 1 Temperature\n");
+ int id = (to_sensor_dev_attr(attr))->index - 1;
+ return sprintf(buf, "CPU %d Temperature\n", id);
}
-static ssize_t get_cpu0_temp(struct device *dev,
+static ssize_t get_cpu_temp(struct device *dev,
struct device_attribute *attr, char *buf)
{
- int value = loongson3_cpu_temp(0);
- return sprintf(buf, "%d\n", value);
-}
-
-static ssize_t get_cpu1_temp(struct device *dev,
- struct device_attribute *attr, char *buf)
-{
- int value = loongson3_cpu_temp(1);
+ int id = (to_sensor_dev_attr(attr))->index - 1;
+ int value = loongson3_cpu_temp(id);
return sprintf(buf, "%d\n", value);
}
static int create_sysfs_cputemp_files(struct kobject *kobj)
{
- int ret;
-
- ret = sysfs_create_files(kobj, hwmon_cputemp1);
- if (ret)
- goto sysfs_create_temp1_fail;
-
- if (loongson_sysconf.nr_cpus <= loongson_sysconf.cores_per_package)
- return 0;
+ int i, ret = 0;
- ret = sysfs_create_files(kobj, hwmon_cputemp2);
- if (ret)
- goto sysfs_create_temp2_fail;
+ for (i=0; i<nr_packages; i++)
+ ret = sysfs_create_files(kobj, hwmon_cputemp[i]);
- return 0;
-
-sysfs_create_temp2_fail:
- sysfs_remove_files(kobj, hwmon_cputemp1);
-
-sysfs_create_temp1_fail:
- return -1;
+ return ret;
}
static void remove_sysfs_cputemp_files(struct kobject *kobj)
{
- sysfs_remove_files(&cpu_hwmon_dev->kobj, hwmon_cputemp1);
+ int i;
- if (loongson_sysconf.nr_cpus > loongson_sysconf.cores_per_package)
- sysfs_remove_files(&cpu_hwmon_dev->kobj, hwmon_cputemp2);
+ for (i=0; i<nr_packages; i++)
+ sysfs_remove_files(kobj, hwmon_cputemp[i]);
}
#define CPU_THERMAL_THRESHOLD 90000
@@ -140,8 +136,15 @@ static struct delayed_work thermal_work;
static void do_thermal_timer(struct work_struct *work)
{
- int value = loongson3_cpu_temp(0);
- if (value <= CPU_THERMAL_THRESHOLD)
+ int i, value, temp_max = 0;
+
+ for (i=0; i<nr_packages; i++) {
+ value = loongson3_cpu_temp(i);
+ if (value > temp_max)
+ temp_max = value;
+ }
+
+ if (temp_max <= CPU_THERMAL_THRESHOLD)
schedule_delayed_work(&thermal_work, msecs_to_jiffies(5000));
else
orderly_poweroff(true);
@@ -160,6 +163,9 @@ static int __init loongson_hwmon_init(void)
goto fail_hwmon_device_register;
}
+ nr_packages = loongson_sysconf.nr_cpus /
+ loongson_sysconf.cores_per_package;
+
ret = sysfs_create_group(&cpu_hwmon_dev->kobj,
&cpu_hwmon_attribute_group);
if (ret) {