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path: root/drivers/hwmon/lm63.c
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Diffstat (limited to 'drivers/hwmon/lm63.c')
-rw-r--r--drivers/hwmon/lm63.c41
1 files changed, 36 insertions, 5 deletions
diff --git a/drivers/hwmon/lm63.c b/drivers/hwmon/lm63.c
index 313aee18be1d..3d882c93b46d 100644
--- a/drivers/hwmon/lm63.c
+++ b/drivers/hwmon/lm63.c
@@ -47,6 +47,7 @@
#include <linux/err.h>
#include <linux/mutex.h>
#include <linux/sysfs.h>
+#include <linux/types.h>
/*
* Addresses to scan
@@ -91,6 +92,8 @@ static const unsigned short normal_i2c[] = { 0x18, 0x4c, 0x4e, I2C_CLIENT_END };
#define LM63_REG_MAN_ID 0xFE
#define LM63_REG_CHIP_ID 0xFF
+#define LM96163_REG_CONFIG_ENHANCED 0x45
+
/*
* Conversions and various macros
* For tachometer counts, the LM63 uses 16-bit values.
@@ -134,7 +137,7 @@ static struct lm63_data *lm63_update_device(struct device *dev);
static int lm63_detect(struct i2c_client *client, struct i2c_board_info *info);
static void lm63_init_client(struct i2c_client *client);
-enum chips { lm63, lm64 };
+enum chips { lm63, lm64, lm96163 };
/*
* Driver data (common to all clients)
@@ -143,6 +146,7 @@ enum chips { lm63, lm64 };
static const struct i2c_device_id lm63_id[] = {
{ "lm63", lm63 },
{ "lm64", lm64 },
+ { "lm96163", lm96163 },
{ }
};
MODULE_DEVICE_TABLE(i2c, lm63_id);
@@ -186,6 +190,7 @@ struct lm63_data {
3: remote offset */
u8 temp2_crit_hyst;
u8 alarms;
+ bool pwm_highres;
};
/*
@@ -226,9 +231,16 @@ static ssize_t show_pwm1(struct device *dev, struct device_attribute *dummy,
char *buf)
{
struct lm63_data *data = lm63_update_device(dev);
- return sprintf(buf, "%d\n", data->pwm1_value >= 2 * data->pwm1_freq ?
+ int pwm;
+
+ if (data->pwm_highres)
+ pwm = data->pwm1_value;
+ else
+ pwm = data->pwm1_value >= 2 * data->pwm1_freq ?
255 : (data->pwm1_value * 255 + data->pwm1_freq) /
- (2 * data->pwm1_freq));
+ (2 * data->pwm1_freq);
+
+ return sprintf(buf, "%d\n", pwm);
}
static ssize_t set_pwm1(struct device *dev, struct device_attribute *dummy,
@@ -246,9 +258,9 @@ static ssize_t set_pwm1(struct device *dev, struct device_attribute *dummy,
if (err)
return err;
+ val = SENSORS_LIMIT(val, 0, 255);
mutex_lock(&data->update_lock);
- data->pwm1_value = val <= 0 ? 0 :
- val >= 255 ? 2 * data->pwm1_freq :
+ data->pwm1_value = data->pwm_highres ? val :
(val * data->pwm1_freq * 2 + 127) / 255;
i2c_smbus_write_byte_data(client, LM63_REG_PWM_VALUE, data->pwm1_value);
mutex_unlock(&data->update_lock);
@@ -522,6 +534,8 @@ static int lm63_detect(struct i2c_client *new_client,
strlcpy(info->type, "lm63", I2C_NAME_SIZE);
else if (chip_id == 0x51 && (address == 0x18 || address == 0x4e))
strlcpy(info->type, "lm64", I2C_NAME_SIZE);
+ else if (chip_id == 0x49 && address == 0x4c)
+ strlcpy(info->type, "lm96163", I2C_NAME_SIZE);
else
return -ENODEV;
@@ -605,6 +619,23 @@ static void lm63_init_client(struct i2c_client *client)
if (data->pwm1_freq == 0)
data->pwm1_freq = 1;
+ /*
+ * For LM96163, check if high resolution PWM is enabled.
+ * Also, check if unsigned temperature format is enabled
+ * and display a warning message if it is.
+ */
+ if (data->kind == lm96163) {
+ u8 config_enhanced
+ = i2c_smbus_read_byte_data(client,
+ LM96163_REG_CONFIG_ENHANCED);
+ if ((config_enhanced & 0x10)
+ && !(data->config_fan & 0x08) && data->pwm1_freq == 8)
+ data->pwm_highres = true;
+ if (config_enhanced & 0x08)
+ dev_warn(&client->dev,
+ "Unsigned format for High and Crit setpoints enabled but not supported by driver\n");
+ }
+
/* Show some debug info about the LM63 configuration */
dev_dbg(&client->dev, "Alert/tach pin configured for %s\n",
(data->config & 0x04) ? "tachometer input" :