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@@ -0,0 +1,740 @@
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+/*
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+ emc2103.c - Support for SMSC EMC2103
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+ Copyright (c) 2010 SMSC
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+
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+ This program is free software; you can redistribute it and/or modify
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+ it under the terms of the GNU General Public License as published by
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+ the Free Software Foundation; either version 2 of the License, or
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+ (at your option) any later version.
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+
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+ This program is distributed in the hope that it will be useful,
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+ but WITHOUT ANY WARRANTY; without even the implied warranty of
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+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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+ GNU General Public License for more details.
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+
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+ You should have received a copy of the GNU General Public License
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+ along with this program; if not, write to the Free Software
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+ Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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+*/
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+
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+#include <linux/module.h>
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+#include <linux/init.h>
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+#include <linux/slab.h>
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+#include <linux/jiffies.h>
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+#include <linux/i2c.h>
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+#include <linux/hwmon.h>
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+#include <linux/hwmon-sysfs.h>
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+#include <linux/err.h>
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+#include <linux/mutex.h>
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+
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+/* Addresses scanned */
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+static const unsigned short normal_i2c[] = { 0x2E, I2C_CLIENT_END };
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+
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+static const u8 REG_TEMP[4] = { 0x00, 0x02, 0x04, 0x06 };
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+static const u8 REG_TEMP_MIN[4] = { 0x3c, 0x38, 0x39, 0x3a };
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+static const u8 REG_TEMP_MAX[4] = { 0x34, 0x30, 0x31, 0x32 };
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+
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+#define REG_CONF1 0x20
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+#define REG_TEMP_MAX_ALARM 0x24
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+#define REG_TEMP_MIN_ALARM 0x25
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+#define REG_FAN_CONF1 0x42
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+#define REG_FAN_TARGET_LO 0x4c
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+#define REG_FAN_TARGET_HI 0x4d
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+#define REG_FAN_TACH_HI 0x4e
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+#define REG_FAN_TACH_LO 0x4f
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+#define REG_PRODUCT_ID 0xfd
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+#define REG_MFG_ID 0xfe
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+
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+/* equation 4 from datasheet: rpm = (3932160 * multipler) / count */
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+#define FAN_RPM_FACTOR 3932160
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+
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+/* 2103-2 and 2103-4's 3rd temperature sensor can be connected to two diodes
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+ * in anti-parallel mode, and in this configuration both can be read
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+ * independently (so we have 4 temperature inputs). The device can't
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+ * detect if it's connected in this mode, so we have to manually enable
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+ * it. Default is to leave the device in the state it's already in (-1).
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+ * This parameter allows APD mode to be optionally forced on or off */
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+static int apd = -1;
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+module_param(apd, bool, 0);
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+MODULE_PARM_DESC(init, "Set to zero to disable anti-parallel diode mode");
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+
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+struct temperature {
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+ s8 degrees;
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+ u8 fraction; /* 0-7 multiples of 0.125 */
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+};
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+
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+struct emc2103_data {
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+ struct device *hwmon_dev;
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+ struct mutex update_lock;
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+ bool valid; /* registers are valid */
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+ bool fan_rpm_control;
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+ int temp_count; /* num of temp sensors */
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+ unsigned long last_updated; /* in jiffies */
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+ struct temperature temp[4]; /* internal + 3 external */
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+ s8 temp_min[4]; /* no fractional part */
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+ s8 temp_max[4]; /* no fractional part */
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+ u8 temp_min_alarm;
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+ u8 temp_max_alarm;
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+ u8 fan_multiplier;
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+ u16 fan_tach;
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+ u16 fan_target;
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+};
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+
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+static int read_u8_from_i2c(struct i2c_client *client, u8 i2c_reg, u8 *output)
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+{
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+ int status = i2c_smbus_read_byte_data(client, i2c_reg);
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+ if (status < 0) {
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+ dev_warn(&client->dev, "reg 0x%02x, err %d\n",
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+ i2c_reg, status);
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+ } else {
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+ *output = status;
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+ }
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+ return status;
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+}
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+
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+static void read_temp_from_i2c(struct i2c_client *client, u8 i2c_reg,
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+ struct temperature *temp)
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+{
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+ u8 degrees, fractional;
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+
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+ if (read_u8_from_i2c(client, i2c_reg, °rees) < 0)
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+ return;
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+
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+ if (read_u8_from_i2c(client, i2c_reg + 1, &fractional) < 0)
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+ return;
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+
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+ temp->degrees = degrees;
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+ temp->fraction = (fractional & 0xe0) >> 5;
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+}
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+
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+static void read_fan_from_i2c(struct i2c_client *client, u16 *output,
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+ u8 hi_addr, u8 lo_addr)
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+{
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+ u8 high_byte, lo_byte;
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+
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+ if (read_u8_from_i2c(client, hi_addr, &high_byte) < 0)
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+ return;
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+
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+ if (read_u8_from_i2c(client, lo_addr, &lo_byte) < 0)
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+ return;
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+
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+ *output = ((u16)high_byte << 5) | (lo_byte >> 3);
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+}
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+
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+static void write_fan_target_to_i2c(struct i2c_client *client, u16 new_target)
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+{
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+ u8 high_byte = (new_target & 0x1fe0) >> 5;
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+ u8 low_byte = (new_target & 0x001f) << 3;
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+ i2c_smbus_write_byte_data(client, REG_FAN_TARGET_LO, low_byte);
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+ i2c_smbus_write_byte_data(client, REG_FAN_TARGET_HI, high_byte);
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+}
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+
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+static void read_fan_config_from_i2c(struct i2c_client *client)
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+
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+{
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+ struct emc2103_data *data = i2c_get_clientdata(client);
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+ u8 conf1;
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+
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+ if (read_u8_from_i2c(client, REG_FAN_CONF1, &conf1) < 0)
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+ return;
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+
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+ data->fan_multiplier = 1 << ((conf1 & 0x60) >> 5);
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+ data->fan_rpm_control = (conf1 & 0x80) != 0;
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+}
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+
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+static struct emc2103_data *emc2103_update_device(struct device *dev)
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+{
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+ struct i2c_client *client = to_i2c_client(dev);
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+ struct emc2103_data *data = i2c_get_clientdata(client);
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+
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+ mutex_lock(&data->update_lock);
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+
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+ if (time_after(jiffies, data->last_updated + HZ + HZ / 2)
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+ || !data->valid) {
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+ int i;
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+
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+ for (i = 0; i < data->temp_count; i++) {
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+ read_temp_from_i2c(client, REG_TEMP[i], &data->temp[i]);
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+ read_u8_from_i2c(client, REG_TEMP_MIN[i],
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+ &data->temp_min[i]);
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+ read_u8_from_i2c(client, REG_TEMP_MAX[i],
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+ &data->temp_max[i]);
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+ }
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+
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+ read_u8_from_i2c(client, REG_TEMP_MIN_ALARM,
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+ &data->temp_min_alarm);
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+ read_u8_from_i2c(client, REG_TEMP_MAX_ALARM,
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+ &data->temp_max_alarm);
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+
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+ read_fan_from_i2c(client, &data->fan_tach,
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+ REG_FAN_TACH_HI, REG_FAN_TACH_LO);
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+ read_fan_from_i2c(client, &data->fan_target,
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+ REG_FAN_TARGET_HI, REG_FAN_TARGET_LO);
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+ read_fan_config_from_i2c(client);
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+
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+ data->last_updated = jiffies;
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+ data->valid = true;
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+ }
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+
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+ mutex_unlock(&data->update_lock);
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+
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+ return data;
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+}
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+
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+static ssize_t
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+show_temp(struct device *dev, struct device_attribute *da, char *buf)
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+{
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+ int nr = to_sensor_dev_attr(da)->index;
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+ struct emc2103_data *data = emc2103_update_device(dev);
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+ int millidegrees = data->temp[nr].degrees * 1000
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+ + data->temp[nr].fraction * 125;
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+ return sprintf(buf, "%d\n", millidegrees);
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+}
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+
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+static ssize_t
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+show_temp_min(struct device *dev, struct device_attribute *da, char *buf)
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+{
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+ int nr = to_sensor_dev_attr(da)->index;
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+ struct emc2103_data *data = emc2103_update_device(dev);
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+ int millidegrees = data->temp_min[nr] * 1000;
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+ return sprintf(buf, "%d\n", millidegrees);
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+}
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+
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+static ssize_t
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+show_temp_max(struct device *dev, struct device_attribute *da, char *buf)
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+{
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+ int nr = to_sensor_dev_attr(da)->index;
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+ struct emc2103_data *data = emc2103_update_device(dev);
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+ int millidegrees = data->temp_max[nr] * 1000;
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+ return sprintf(buf, "%d\n", millidegrees);
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+}
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+
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+static ssize_t
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+show_temp_fault(struct device *dev, struct device_attribute *da, char *buf)
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+{
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+ int nr = to_sensor_dev_attr(da)->index;
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+ struct emc2103_data *data = emc2103_update_device(dev);
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+ bool fault = (data->temp[nr].degrees == -128);
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+ return sprintf(buf, "%d\n", fault ? 1 : 0);
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+}
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+
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+static ssize_t
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+show_temp_min_alarm(struct device *dev, struct device_attribute *da, char *buf)
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+{
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+ int nr = to_sensor_dev_attr(da)->index;
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+ struct emc2103_data *data = emc2103_update_device(dev);
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+ bool alarm = data->temp_min_alarm & (1 << nr);
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+ return sprintf(buf, "%d\n", alarm ? 1 : 0);
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+}
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+
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+static ssize_t
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+show_temp_max_alarm(struct device *dev, struct device_attribute *da, char *buf)
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+{
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+ int nr = to_sensor_dev_attr(da)->index;
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+ struct emc2103_data *data = emc2103_update_device(dev);
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+ bool alarm = data->temp_max_alarm & (1 << nr);
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+ return sprintf(buf, "%d\n", alarm ? 1 : 0);
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+}
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+
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+static ssize_t set_temp_min(struct device *dev, struct device_attribute *da,
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+ const char *buf, size_t count)
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+{
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+ int nr = to_sensor_dev_attr(da)->index;
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+ struct i2c_client *client = to_i2c_client(dev);
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+ struct emc2103_data *data = i2c_get_clientdata(client);
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+ long val;
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+
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+ int result = strict_strtol(buf, 10, &val);
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+ if (result < 0)
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+ return -EINVAL;
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+
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+ val = DIV_ROUND_CLOSEST(val, 1000);
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+ if ((val < -63) || (val > 127))
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+ return -EINVAL;
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+
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+ mutex_lock(&data->update_lock);
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+ data->temp_min[nr] = val;
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+ i2c_smbus_write_byte_data(client, REG_TEMP_MIN[nr], val);
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+ mutex_unlock(&data->update_lock);
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+
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+ return count;
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+}
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+
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+static ssize_t set_temp_max(struct device *dev, struct device_attribute *da,
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+ const char *buf, size_t count)
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+{
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+ int nr = to_sensor_dev_attr(da)->index;
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+ struct i2c_client *client = to_i2c_client(dev);
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+ struct emc2103_data *data = i2c_get_clientdata(client);
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+ long val;
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+
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+ int result = strict_strtol(buf, 10, &val);
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+ if (result < 0)
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+ return -EINVAL;
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+
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+ val = DIV_ROUND_CLOSEST(val, 1000);
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+ if ((val < -63) || (val > 127))
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+ return -EINVAL;
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+
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+ mutex_lock(&data->update_lock);
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+ data->temp_max[nr] = val;
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+ i2c_smbus_write_byte_data(client, REG_TEMP_MAX[nr], val);
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+ mutex_unlock(&data->update_lock);
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+
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+ return count;
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+}
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+
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+static ssize_t
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+show_fan(struct device *dev, struct device_attribute *da, char *buf)
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+{
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+ struct emc2103_data *data = emc2103_update_device(dev);
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+ int rpm = 0;
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+ if (data->fan_tach != 0)
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+ rpm = (FAN_RPM_FACTOR * data->fan_multiplier) / data->fan_tach;
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+ return sprintf(buf, "%d\n", rpm);
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+}
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+
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+static ssize_t
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+show_fan_div(struct device *dev, struct device_attribute *da, char *buf)
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+{
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+ struct emc2103_data *data = emc2103_update_device(dev);
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+ int fan_div = 8 / data->fan_multiplier;
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+ return sprintf(buf, "%d\n", fan_div);
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+}
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+
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+/* Note: we also update the fan target here, because its value is
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+ determined in part by the fan clock divider. This follows the principle
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+ of least surprise; the user doesn't expect the fan target to change just
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+ because the divider changed. */
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+static ssize_t set_fan_div(struct device *dev, struct device_attribute *da,
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+ const char *buf, size_t count)
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+{
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+ struct emc2103_data *data = emc2103_update_device(dev);
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+ struct i2c_client *client = to_i2c_client(dev);
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+ int new_range_bits, old_div = 8 / data->fan_multiplier;
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+ long new_div;
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+
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+ int status = strict_strtol(buf, 10, &new_div);
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+ if (status < 0)
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+ return -EINVAL;
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+
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+ if (new_div == old_div) /* No change */
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+ return count;
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+
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+ switch (new_div) {
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+ case 1:
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+ new_range_bits = 3;
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+ break;
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+ case 2:
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+ new_range_bits = 2;
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+ break;
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+ case 4:
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+ new_range_bits = 1;
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+ break;
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+ case 8:
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+ new_range_bits = 0;
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+ break;
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+ default:
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+ return -EINVAL;
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+ }
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+
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+ mutex_lock(&data->update_lock);
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+
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+ status = i2c_smbus_read_byte_data(client, REG_FAN_CONF1);
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+ if (status < 0) {
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+ dev_dbg(&client->dev, "reg 0x%02x, err %d\n",
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+ REG_FAN_CONF1, status);
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+ mutex_unlock(&data->update_lock);
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+ return -EIO;
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+ }
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+ status &= 0x9F;
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+ status |= (new_range_bits << 5);
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+ i2c_smbus_write_byte_data(client, REG_FAN_CONF1, status);
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+
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+ data->fan_multiplier = 8 / new_div;
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+
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+ /* update fan target if high byte is not disabled */
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+ if ((data->fan_target & 0x1fe0) != 0x1fe0) {
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+ u16 new_target = (data->fan_target * old_div) / new_div;
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+ data->fan_target = min(new_target, (u16)0x1fff);
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+ write_fan_target_to_i2c(client, data->fan_target);
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+ }
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+
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+ /* invalidate data to force re-read from hardware */
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+ data->valid = false;
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+
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+ mutex_unlock(&data->update_lock);
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+ return count;
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+}
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+
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+static ssize_t
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+show_fan_target(struct device *dev, struct device_attribute *da, char *buf)
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+{
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+ struct emc2103_data *data = emc2103_update_device(dev);
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+ int rpm = 0;
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+
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|
|
+ /* high byte of 0xff indicates disabled so return 0 */
|
|
|
+ if ((data->fan_target != 0) && ((data->fan_target & 0x1fe0) != 0x1fe0))
|
|
|
+ rpm = (FAN_RPM_FACTOR * data->fan_multiplier)
|
|
|
+ / data->fan_target;
|
|
|
+
|
|
|
+ return sprintf(buf, "%d\n", rpm);
|
|
|
+}
|
|
|
+
|
|
|
+static ssize_t set_fan_target(struct device *dev, struct device_attribute *da,
|
|
|
+ const char *buf, size_t count)
|
|
|
+{
|
|
|
+ struct emc2103_data *data = emc2103_update_device(dev);
|
|
|
+ struct i2c_client *client = to_i2c_client(dev);
|
|
|
+ long rpm_target;
|
|
|
+
|
|
|
+ int result = strict_strtol(buf, 10, &rpm_target);
|
|
|
+ if (result < 0)
|
|
|
+ return -EINVAL;
|
|
|
+
|
|
|
+ /* Datasheet states 16384 as maximum RPM target (table 3.2) */
|
|
|
+ if ((rpm_target < 0) || (rpm_target > 16384))
|
|
|
+ return -EINVAL;
|
|
|
+
|
|
|
+ mutex_lock(&data->update_lock);
|
|
|
+
|
|
|
+ if (rpm_target == 0)
|
|
|
+ data->fan_target = 0x1fff;
|
|
|
+ else
|
|
|
+ data->fan_target = SENSORS_LIMIT(
|
|
|
+ (FAN_RPM_FACTOR * data->fan_multiplier) / rpm_target,
|
|
|
+ 0, 0x1fff);
|
|
|
+
|
|
|
+ write_fan_target_to_i2c(client, data->fan_target);
|
|
|
+
|
|
|
+ mutex_unlock(&data->update_lock);
|
|
|
+ return count;
|
|
|
+}
|
|
|
+
|
|
|
+static ssize_t
|
|
|
+show_fan_fault(struct device *dev, struct device_attribute *da, char *buf)
|
|
|
+{
|
|
|
+ struct emc2103_data *data = emc2103_update_device(dev);
|
|
|
+ bool fault = ((data->fan_tach & 0x1fe0) == 0x1fe0);
|
|
|
+ return sprintf(buf, "%d\n", fault ? 1 : 0);
|
|
|
+}
|
|
|
+
|
|
|
+static ssize_t
|
|
|
+show_pwm_enable(struct device *dev, struct device_attribute *da, char *buf)
|
|
|
+{
|
|
|
+ struct emc2103_data *data = emc2103_update_device(dev);
|
|
|
+ return sprintf(buf, "%d\n", data->fan_rpm_control ? 3 : 0);
|
|
|
+}
|
|
|
+
|
|
|
+static ssize_t set_pwm_enable(struct device *dev, struct device_attribute *da,
|
|
|
+ const char *buf, size_t count)
|
|
|
+{
|
|
|
+ struct i2c_client *client = to_i2c_client(dev);
|
|
|
+ struct emc2103_data *data = i2c_get_clientdata(client);
|
|
|
+ long new_value;
|
|
|
+ u8 conf_reg;
|
|
|
+
|
|
|
+ int result = strict_strtol(buf, 10, &new_value);
|
|
|
+ if (result < 0)
|
|
|
+ return -EINVAL;
|
|
|
+
|
|
|
+ mutex_lock(&data->update_lock);
|
|
|
+ switch (new_value) {
|
|
|
+ case 0:
|
|
|
+ data->fan_rpm_control = false;
|
|
|
+ break;
|
|
|
+ case 3:
|
|
|
+ data->fan_rpm_control = true;
|
|
|
+ break;
|
|
|
+ default:
|
|
|
+ mutex_unlock(&data->update_lock);
|
|
|
+ return -EINVAL;
|
|
|
+ }
|
|
|
+
|
|
|
+ read_u8_from_i2c(client, REG_FAN_CONF1, &conf_reg);
|
|
|
+
|
|
|
+ if (data->fan_rpm_control)
|
|
|
+ conf_reg |= 0x80;
|
|
|
+ else
|
|
|
+ conf_reg &= ~0x80;
|
|
|
+
|
|
|
+ i2c_smbus_write_byte_data(client, REG_FAN_CONF1, conf_reg);
|
|
|
+
|
|
|
+ mutex_unlock(&data->update_lock);
|
|
|
+ return count;
|
|
|
+}
|
|
|
+
|
|
|
+static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, show_temp, NULL, 0);
|
|
|
+static SENSOR_DEVICE_ATTR(temp1_min, S_IRUGO | S_IWUSR, show_temp_min,
|
|
|
+ set_temp_min, 0);
|
|
|
+static SENSOR_DEVICE_ATTR(temp1_max, S_IRUGO | S_IWUSR, show_temp_max,
|
|
|
+ set_temp_max, 0);
|
|
|
+static SENSOR_DEVICE_ATTR(temp1_fault, S_IRUGO, show_temp_fault, NULL, 0);
|
|
|
+static SENSOR_DEVICE_ATTR(temp1_min_alarm, S_IRUGO, show_temp_min_alarm,
|
|
|
+ NULL, 0);
|
|
|
+static SENSOR_DEVICE_ATTR(temp1_max_alarm, S_IRUGO, show_temp_max_alarm,
|
|
|
+ NULL, 0);
|
|
|
+
|
|
|
+static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO, show_temp, NULL, 1);
|
|
|
+static SENSOR_DEVICE_ATTR(temp2_min, S_IRUGO | S_IWUSR, show_temp_min,
|
|
|
+ set_temp_min, 1);
|
|
|
+static SENSOR_DEVICE_ATTR(temp2_max, S_IRUGO | S_IWUSR, show_temp_max,
|
|
|
+ set_temp_max, 1);
|
|
|
+static SENSOR_DEVICE_ATTR(temp2_fault, S_IRUGO, show_temp_fault, NULL, 1);
|
|
|
+static SENSOR_DEVICE_ATTR(temp2_min_alarm, S_IRUGO, show_temp_min_alarm,
|
|
|
+ NULL, 1);
|
|
|
+static SENSOR_DEVICE_ATTR(temp2_max_alarm, S_IRUGO, show_temp_max_alarm,
|
|
|
+ NULL, 1);
|
|
|
+
|
|
|
+static SENSOR_DEVICE_ATTR(temp3_input, S_IRUGO, show_temp, NULL, 2);
|
|
|
+static SENSOR_DEVICE_ATTR(temp3_min, S_IRUGO | S_IWUSR, show_temp_min,
|
|
|
+ set_temp_min, 2);
|
|
|
+static SENSOR_DEVICE_ATTR(temp3_max, S_IRUGO | S_IWUSR, show_temp_max,
|
|
|
+ set_temp_max, 2);
|
|
|
+static SENSOR_DEVICE_ATTR(temp3_fault, S_IRUGO, show_temp_fault, NULL, 2);
|
|
|
+static SENSOR_DEVICE_ATTR(temp3_min_alarm, S_IRUGO, show_temp_min_alarm,
|
|
|
+ NULL, 2);
|
|
|
+static SENSOR_DEVICE_ATTR(temp3_max_alarm, S_IRUGO, show_temp_max_alarm,
|
|
|
+ NULL, 2);
|
|
|
+
|
|
|
+static SENSOR_DEVICE_ATTR(temp4_input, S_IRUGO, show_temp, NULL, 3);
|
|
|
+static SENSOR_DEVICE_ATTR(temp4_min, S_IRUGO | S_IWUSR, show_temp_min,
|
|
|
+ set_temp_min, 3);
|
|
|
+static SENSOR_DEVICE_ATTR(temp4_max, S_IRUGO | S_IWUSR, show_temp_max,
|
|
|
+ set_temp_max, 3);
|
|
|
+static SENSOR_DEVICE_ATTR(temp4_fault, S_IRUGO, show_temp_fault, NULL, 3);
|
|
|
+static SENSOR_DEVICE_ATTR(temp4_min_alarm, S_IRUGO, show_temp_min_alarm,
|
|
|
+ NULL, 3);
|
|
|
+static SENSOR_DEVICE_ATTR(temp4_max_alarm, S_IRUGO, show_temp_max_alarm,
|
|
|
+ NULL, 3);
|
|
|
+
|
|
|
+static DEVICE_ATTR(fan1_input, S_IRUGO, show_fan, NULL);
|
|
|
+static DEVICE_ATTR(fan1_div, S_IRUGO | S_IWUSR, show_fan_div, set_fan_div);
|
|
|
+static DEVICE_ATTR(fan1_target, S_IRUGO | S_IWUSR, show_fan_target,
|
|
|
+ set_fan_target);
|
|
|
+static DEVICE_ATTR(fan1_fault, S_IRUGO, show_fan_fault, NULL);
|
|
|
+
|
|
|
+static DEVICE_ATTR(pwm1_enable, S_IRUGO | S_IWUSR, show_pwm_enable,
|
|
|
+ set_pwm_enable);
|
|
|
+
|
|
|
+/* sensors present on all models */
|
|
|
+static struct attribute *emc2103_attributes[] = {
|
|
|
+ &sensor_dev_attr_temp1_input.dev_attr.attr,
|
|
|
+ &sensor_dev_attr_temp1_min.dev_attr.attr,
|
|
|
+ &sensor_dev_attr_temp1_max.dev_attr.attr,
|
|
|
+ &sensor_dev_attr_temp1_fault.dev_attr.attr,
|
|
|
+ &sensor_dev_attr_temp1_min_alarm.dev_attr.attr,
|
|
|
+ &sensor_dev_attr_temp1_max_alarm.dev_attr.attr,
|
|
|
+ &sensor_dev_attr_temp2_input.dev_attr.attr,
|
|
|
+ &sensor_dev_attr_temp2_min.dev_attr.attr,
|
|
|
+ &sensor_dev_attr_temp2_max.dev_attr.attr,
|
|
|
+ &sensor_dev_attr_temp2_fault.dev_attr.attr,
|
|
|
+ &sensor_dev_attr_temp2_min_alarm.dev_attr.attr,
|
|
|
+ &sensor_dev_attr_temp2_max_alarm.dev_attr.attr,
|
|
|
+ &dev_attr_fan1_input.attr,
|
|
|
+ &dev_attr_fan1_div.attr,
|
|
|
+ &dev_attr_fan1_target.attr,
|
|
|
+ &dev_attr_fan1_fault.attr,
|
|
|
+ &dev_attr_pwm1_enable.attr,
|
|
|
+ NULL
|
|
|
+};
|
|
|
+
|
|
|
+/* extra temperature sensors only present on 2103-2 and 2103-4 */
|
|
|
+static struct attribute *emc2103_attributes_temp3[] = {
|
|
|
+ &sensor_dev_attr_temp3_input.dev_attr.attr,
|
|
|
+ &sensor_dev_attr_temp3_min.dev_attr.attr,
|
|
|
+ &sensor_dev_attr_temp3_max.dev_attr.attr,
|
|
|
+ &sensor_dev_attr_temp3_fault.dev_attr.attr,
|
|
|
+ &sensor_dev_attr_temp3_min_alarm.dev_attr.attr,
|
|
|
+ &sensor_dev_attr_temp3_max_alarm.dev_attr.attr,
|
|
|
+ NULL
|
|
|
+};
|
|
|
+
|
|
|
+/* extra temperature sensors only present on 2103-2 and 2103-4 in APD mode */
|
|
|
+static struct attribute *emc2103_attributes_temp4[] = {
|
|
|
+ &sensor_dev_attr_temp4_input.dev_attr.attr,
|
|
|
+ &sensor_dev_attr_temp4_min.dev_attr.attr,
|
|
|
+ &sensor_dev_attr_temp4_max.dev_attr.attr,
|
|
|
+ &sensor_dev_attr_temp4_fault.dev_attr.attr,
|
|
|
+ &sensor_dev_attr_temp4_min_alarm.dev_attr.attr,
|
|
|
+ &sensor_dev_attr_temp4_max_alarm.dev_attr.attr,
|
|
|
+ NULL
|
|
|
+};
|
|
|
+
|
|
|
+static const struct attribute_group emc2103_group = {
|
|
|
+ .attrs = emc2103_attributes,
|
|
|
+};
|
|
|
+
|
|
|
+static const struct attribute_group emc2103_temp3_group = {
|
|
|
+ .attrs = emc2103_attributes_temp3,
|
|
|
+};
|
|
|
+
|
|
|
+static const struct attribute_group emc2103_temp4_group = {
|
|
|
+ .attrs = emc2103_attributes_temp4,
|
|
|
+};
|
|
|
+
|
|
|
+static int
|
|
|
+emc2103_probe(struct i2c_client *client, const struct i2c_device_id *id)
|
|
|
+{
|
|
|
+ struct emc2103_data *data;
|
|
|
+ int status;
|
|
|
+
|
|
|
+ if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA))
|
|
|
+ return -EIO;
|
|
|
+
|
|
|
+ data = kzalloc(sizeof(struct emc2103_data), GFP_KERNEL);
|
|
|
+ if (!data)
|
|
|
+ return -ENOMEM;
|
|
|
+
|
|
|
+ i2c_set_clientdata(client, data);
|
|
|
+ mutex_init(&data->update_lock);
|
|
|
+
|
|
|
+ /* 2103-2 and 2103-4 have 3 external diodes, 2103-1 has 1 */
|
|
|
+ status = i2c_smbus_read_byte_data(client, REG_PRODUCT_ID);
|
|
|
+ if (status == 0x24) {
|
|
|
+ /* 2103-1 only has 1 external diode */
|
|
|
+ data->temp_count = 2;
|
|
|
+ } else {
|
|
|
+ /* 2103-2 and 2103-4 have 3 or 4 external diodes */
|
|
|
+ status = i2c_smbus_read_byte_data(client, REG_CONF1);
|
|
|
+ if (status < 0) {
|
|
|
+ dev_dbg(&client->dev, "reg 0x%02x, err %d\n", REG_CONF1,
|
|
|
+ status);
|
|
|
+ goto exit_free;
|
|
|
+ }
|
|
|
+
|
|
|
+ /* detect current state of hardware */
|
|
|
+ data->temp_count = (status & 0x01) ? 4 : 3;
|
|
|
+
|
|
|
+ /* force APD state if module parameter is set */
|
|
|
+ if (apd == 0) {
|
|
|
+ /* force APD mode off */
|
|
|
+ data->temp_count = 3;
|
|
|
+ status &= ~(0x01);
|
|
|
+ i2c_smbus_write_byte_data(client, REG_CONF1, status);
|
|
|
+ } else if (apd == 1) {
|
|
|
+ /* force APD mode on */
|
|
|
+ data->temp_count = 4;
|
|
|
+ status |= 0x01;
|
|
|
+ i2c_smbus_write_byte_data(client, REG_CONF1, status);
|
|
|
+ }
|
|
|
+ }
|
|
|
+
|
|
|
+ /* Register sysfs hooks */
|
|
|
+ status = sysfs_create_group(&client->dev.kobj, &emc2103_group);
|
|
|
+ if (status)
|
|
|
+ goto exit_free;
|
|
|
+
|
|
|
+ if (data->temp_count >= 3) {
|
|
|
+ status = sysfs_create_group(&client->dev.kobj,
|
|
|
+ &emc2103_temp3_group);
|
|
|
+ if (status)
|
|
|
+ goto exit_remove;
|
|
|
+ }
|
|
|
+
|
|
|
+ if (data->temp_count == 4) {
|
|
|
+ status = sysfs_create_group(&client->dev.kobj,
|
|
|
+ &emc2103_temp4_group);
|
|
|
+ if (status)
|
|
|
+ goto exit_remove_temp3;
|
|
|
+ }
|
|
|
+
|
|
|
+ data->hwmon_dev = hwmon_device_register(&client->dev);
|
|
|
+ if (IS_ERR(data->hwmon_dev)) {
|
|
|
+ status = PTR_ERR(data->hwmon_dev);
|
|
|
+ goto exit_remove_temp4;
|
|
|
+ }
|
|
|
+
|
|
|
+ dev_info(&client->dev, "%s: sensor '%s'\n",
|
|
|
+ dev_name(data->hwmon_dev), client->name);
|
|
|
+
|
|
|
+ return 0;
|
|
|
+
|
|
|
+exit_remove_temp4:
|
|
|
+ if (data->temp_count == 4)
|
|
|
+ sysfs_remove_group(&client->dev.kobj, &emc2103_temp4_group);
|
|
|
+exit_remove_temp3:
|
|
|
+ if (data->temp_count >= 3)
|
|
|
+ sysfs_remove_group(&client->dev.kobj, &emc2103_temp3_group);
|
|
|
+exit_remove:
|
|
|
+ sysfs_remove_group(&client->dev.kobj, &emc2103_group);
|
|
|
+exit_free:
|
|
|
+ kfree(data);
|
|
|
+ return status;
|
|
|
+}
|
|
|
+
|
|
|
+static int emc2103_remove(struct i2c_client *client)
|
|
|
+{
|
|
|
+ struct emc2103_data *data = i2c_get_clientdata(client);
|
|
|
+
|
|
|
+ hwmon_device_unregister(data->hwmon_dev);
|
|
|
+
|
|
|
+ if (data->temp_count == 4)
|
|
|
+ sysfs_remove_group(&client->dev.kobj, &emc2103_temp4_group);
|
|
|
+
|
|
|
+ if (data->temp_count >= 3)
|
|
|
+ sysfs_remove_group(&client->dev.kobj, &emc2103_temp3_group);
|
|
|
+
|
|
|
+ sysfs_remove_group(&client->dev.kobj, &emc2103_group);
|
|
|
+
|
|
|
+ kfree(data);
|
|
|
+ return 0;
|
|
|
+}
|
|
|
+
|
|
|
+static const struct i2c_device_id emc2103_ids[] = {
|
|
|
+ { "emc2103", 0, },
|
|
|
+ { /* LIST END */ }
|
|
|
+};
|
|
|
+MODULE_DEVICE_TABLE(i2c, emc2103_ids);
|
|
|
+
|
|
|
+/* Return 0 if detection is successful, -ENODEV otherwise */
|
|
|
+static int
|
|
|
+emc2103_detect(struct i2c_client *new_client, struct i2c_board_info *info)
|
|
|
+{
|
|
|
+ struct i2c_adapter *adapter = new_client->adapter;
|
|
|
+ int manufacturer, product;
|
|
|
+
|
|
|
+ if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
|
|
|
+ return -ENODEV;
|
|
|
+
|
|
|
+ manufacturer = i2c_smbus_read_byte_data(new_client, REG_MFG_ID);
|
|
|
+ if (manufacturer != 0x5D)
|
|
|
+ return -ENODEV;
|
|
|
+
|
|
|
+ product = i2c_smbus_read_byte_data(new_client, REG_PRODUCT_ID);
|
|
|
+ if ((product != 0x24) && (product != 0x26))
|
|
|
+ return -ENODEV;
|
|
|
+
|
|
|
+ strlcpy(info->type, "emc2103", I2C_NAME_SIZE);
|
|
|
+
|
|
|
+ return 0;
|
|
|
+}
|
|
|
+
|
|
|
+static struct i2c_driver emc2103_driver = {
|
|
|
+ .class = I2C_CLASS_HWMON,
|
|
|
+ .driver = {
|
|
|
+ .name = "emc2103",
|
|
|
+ },
|
|
|
+ .probe = emc2103_probe,
|
|
|
+ .remove = emc2103_remove,
|
|
|
+ .id_table = emc2103_ids,
|
|
|
+ .detect = emc2103_detect,
|
|
|
+ .address_list = normal_i2c,
|
|
|
+};
|
|
|
+
|
|
|
+static int __init sensors_emc2103_init(void)
|
|
|
+{
|
|
|
+ return i2c_add_driver(&emc2103_driver);
|
|
|
+}
|
|
|
+
|
|
|
+static void __exit sensors_emc2103_exit(void)
|
|
|
+{
|
|
|
+ i2c_del_driver(&emc2103_driver);
|
|
|
+}
|
|
|
+
|
|
|
+MODULE_AUTHOR("Steve Glendinning <steve.glendinning@smsc.com>");
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|
|
+MODULE_DESCRIPTION("SMSC EMC2103 hwmon driver");
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|
|
+MODULE_LICENSE("GPL");
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|
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+
|
|
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+module_init(sensors_emc2103_init);
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|
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+module_exit(sensors_emc2103_exit);
|
Linus Torvalds