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path: root/drivers/hwmon/sch5627.c
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Diffstat (limited to 'drivers/hwmon/sch5627.c')
-rw-r--r--drivers/hwmon/sch5627.c605
1 files changed, 605 insertions, 0 deletions
diff --git a/drivers/hwmon/sch5627.c b/drivers/hwmon/sch5627.c
new file mode 100644
index 00000000000..0cc99fd83e8
--- /dev/null
+++ b/drivers/hwmon/sch5627.c
@@ -0,0 +1,605 @@
+/***************************************************************************
+ * Copyright (C) 2010-2012 Hans de Goede <hdegoede@redhat.com> *
+ * *
+ * This program is free software; you can redistribute it and/or modify *
+ * it under the terms of the GNU General Public License as published by *
+ * the Free Software Foundation; either version 2 of the License, or *
+ * (at your option) any later version. *
+ * *
+ * This program is distributed in the hope that it will be useful, *
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of *
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
+ * GNU General Public License for more details. *
+ * *
+ * You should have received a copy of the GNU General Public License *
+ * along with this program; if not, write to the *
+ * Free Software Foundation, Inc., *
+ * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *
+ ***************************************************************************/
+
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/slab.h>
+#include <linux/jiffies.h>
+#include <linux/platform_device.h>
+#include <linux/hwmon.h>
+#include <linux/hwmon-sysfs.h>
+#include <linux/err.h>
+#include <linux/mutex.h>
+#include "sch56xx-common.h"
+
+#define DRVNAME "sch5627"
+#define DEVNAME DRVNAME /* We only support one model */
+
+#define SCH5627_HWMON_ID 0xa5
+#define SCH5627_COMPANY_ID 0x5c
+#define SCH5627_PRIMARY_ID 0xa0
+
+#define SCH5627_REG_BUILD_CODE 0x39
+#define SCH5627_REG_BUILD_ID 0x3a
+#define SCH5627_REG_HWMON_ID 0x3c
+#define SCH5627_REG_HWMON_REV 0x3d
+#define SCH5627_REG_COMPANY_ID 0x3e
+#define SCH5627_REG_PRIMARY_ID 0x3f
+#define SCH5627_REG_CTRL 0x40
+
+#define SCH5627_NO_TEMPS 8
+#define SCH5627_NO_FANS 4
+#define SCH5627_NO_IN 5
+
+static const u16 SCH5627_REG_TEMP_MSB[SCH5627_NO_TEMPS] = {
+ 0x2B, 0x26, 0x27, 0x28, 0x29, 0x2A, 0x180, 0x181 };
+static const u16 SCH5627_REG_TEMP_LSN[SCH5627_NO_TEMPS] = {
+ 0xE2, 0xE1, 0xE1, 0xE5, 0xE5, 0xE6, 0x182, 0x182 };
+static const u16 SCH5627_REG_TEMP_HIGH_NIBBLE[SCH5627_NO_TEMPS] = {
+ 0, 0, 1, 1, 0, 0, 0, 1 };
+static const u16 SCH5627_REG_TEMP_HIGH[SCH5627_NO_TEMPS] = {
+ 0x61, 0x57, 0x59, 0x5B, 0x5D, 0x5F, 0x184, 0x186 };
+static const u16 SCH5627_REG_TEMP_ABS[SCH5627_NO_TEMPS] = {
+ 0x9B, 0x96, 0x97, 0x98, 0x99, 0x9A, 0x1A8, 0x1A9 };
+
+static const u16 SCH5627_REG_FAN[SCH5627_NO_FANS] = {
+ 0x2C, 0x2E, 0x30, 0x32 };
+static const u16 SCH5627_REG_FAN_MIN[SCH5627_NO_FANS] = {
+ 0x62, 0x64, 0x66, 0x68 };
+
+static const u16 SCH5627_REG_IN_MSB[SCH5627_NO_IN] = {
+ 0x22, 0x23, 0x24, 0x25, 0x189 };
+static const u16 SCH5627_REG_IN_LSN[SCH5627_NO_IN] = {
+ 0xE4, 0xE4, 0xE3, 0xE3, 0x18A };
+static const u16 SCH5627_REG_IN_HIGH_NIBBLE[SCH5627_NO_IN] = {
+ 1, 0, 1, 0, 1 };
+static const u16 SCH5627_REG_IN_FACTOR[SCH5627_NO_IN] = {
+ 10745, 3660, 9765, 10745, 3660 };
+static const char * const SCH5627_IN_LABELS[SCH5627_NO_IN] = {
+ "VCC", "VTT", "VBAT", "VTR", "V_IN" };
+
+struct sch5627_data {
+ unsigned short addr;
+ struct device *hwmon_dev;
+ struct sch56xx_watchdog_data *watchdog;
+ u8 control;
+ u8 temp_max[SCH5627_NO_TEMPS];
+ u8 temp_crit[SCH5627_NO_TEMPS];
+ u16 fan_min[SCH5627_NO_FANS];
+
+ struct mutex update_lock;
+ unsigned long last_battery; /* In jiffies */
+ char valid; /* !=0 if following fields are valid */
+ unsigned long last_updated; /* In jiffies */
+ u16 temp[SCH5627_NO_TEMPS];
+ u16 fan[SCH5627_NO_FANS];
+ u16 in[SCH5627_NO_IN];
+};
+
+static struct sch5627_data *sch5627_update_device(struct device *dev)
+{
+ struct sch5627_data *data = dev_get_drvdata(dev);
+ struct sch5627_data *ret = data;
+ int i, val;
+
+ mutex_lock(&data->update_lock);
+
+ /* Trigger a Vbat voltage measurement every 5 minutes */
+ if (time_after(jiffies, data->last_battery + 300 * HZ)) {
+ sch56xx_write_virtual_reg(data->addr, SCH5627_REG_CTRL,
+ data->control | 0x10);
+ data->last_battery = jiffies;
+ }
+
+ /* Cache the values for 1 second */
+ if (time_after(jiffies, data->last_updated + HZ) || !data->valid) {
+ for (i = 0; i < SCH5627_NO_TEMPS; i++) {
+ val = sch56xx_read_virtual_reg12(data->addr,
+ SCH5627_REG_TEMP_MSB[i],
+ SCH5627_REG_TEMP_LSN[i],
+ SCH5627_REG_TEMP_HIGH_NIBBLE[i]);
+ if (unlikely(val < 0)) {
+ ret = ERR_PTR(val);
+ goto abort;
+ }
+ data->temp[i] = val;
+ }
+
+ for (i = 0; i < SCH5627_NO_FANS; i++) {
+ val = sch56xx_read_virtual_reg16(data->addr,
+ SCH5627_REG_FAN[i]);
+ if (unlikely(val < 0)) {
+ ret = ERR_PTR(val);
+ goto abort;
+ }
+ data->fan[i] = val;
+ }
+
+ for (i = 0; i < SCH5627_NO_IN; i++) {
+ val = sch56xx_read_virtual_reg12(data->addr,
+ SCH5627_REG_IN_MSB[i],
+ SCH5627_REG_IN_LSN[i],
+ SCH5627_REG_IN_HIGH_NIBBLE[i]);
+ if (unlikely(val < 0)) {
+ ret = ERR_PTR(val);
+ goto abort;
+ }
+ data->in[i] = val;
+ }
+
+ data->last_updated = jiffies;
+ data->valid = 1;
+ }
+abort:
+ mutex_unlock(&data->update_lock);
+ return ret;
+}
+
+static int sch5627_read_limits(struct sch5627_data *data)
+{
+ int i, val;
+
+ for (i = 0; i < SCH5627_NO_TEMPS; i++) {
+ /*
+ * Note what SMSC calls ABS, is what lm_sensors calls max
+ * (aka high), and HIGH is what lm_sensors calls crit.
+ */
+ val = sch56xx_read_virtual_reg(data->addr,
+ SCH5627_REG_TEMP_ABS[i]);
+ if (val < 0)
+ return val;
+ data->temp_max[i] = val;
+
+ val = sch56xx_read_virtual_reg(data->addr,
+ SCH5627_REG_TEMP_HIGH[i]);
+ if (val < 0)
+ return val;
+ data->temp_crit[i] = val;
+ }
+ for (i = 0; i < SCH5627_NO_FANS; i++) {
+ val = sch56xx_read_virtual_reg16(data->addr,
+ SCH5627_REG_FAN_MIN[i]);
+ if (val < 0)
+ return val;
+ data->fan_min[i] = val;
+ }
+
+ return 0;
+}
+
+static int reg_to_temp(u16 reg)
+{
+ return (reg * 625) / 10 - 64000;
+}
+
+static int reg_to_temp_limit(u8 reg)
+{
+ return (reg - 64) * 1000;
+}
+
+static int reg_to_rpm(u16 reg)
+{
+ if (reg == 0)
+ return -EIO;
+ if (reg == 0xffff)
+ return 0;
+
+ return 5400540 / reg;
+}
+
+static ssize_t show_name(struct device *dev, struct device_attribute *devattr,
+ char *buf)
+{
+ return snprintf(buf, PAGE_SIZE, "%s\n", DEVNAME);
+}
+
+static ssize_t show_temp(struct device *dev, struct device_attribute
+ *devattr, char *buf)
+{
+ struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
+ struct sch5627_data *data = sch5627_update_device(dev);
+ int val;
+
+ if (IS_ERR(data))
+ return PTR_ERR(data);
+
+ val = reg_to_temp(data->temp[attr->index]);
+ return snprintf(buf, PAGE_SIZE, "%d\n", val);
+}
+
+static ssize_t show_temp_fault(struct device *dev, struct device_attribute
+ *devattr, char *buf)
+{
+ struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
+ struct sch5627_data *data = sch5627_update_device(dev);
+
+ if (IS_ERR(data))
+ return PTR_ERR(data);
+
+ return snprintf(buf, PAGE_SIZE, "%d\n", data->temp[attr->index] == 0);
+}
+
+static ssize_t show_temp_max(struct device *dev, struct device_attribute
+ *devattr, char *buf)
+{
+ struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
+ struct sch5627_data *data = dev_get_drvdata(dev);
+ int val;
+
+ val = reg_to_temp_limit(data->temp_max[attr->index]);
+ return snprintf(buf, PAGE_SIZE, "%d\n", val);
+}
+
+static ssize_t show_temp_crit(struct device *dev, struct device_attribute
+ *devattr, char *buf)
+{
+ struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
+ struct sch5627_data *data = dev_get_drvdata(dev);
+ int val;
+
+ val = reg_to_temp_limit(data->temp_crit[attr->index]);
+ return snprintf(buf, PAGE_SIZE, "%d\n", val);
+}
+
+static ssize_t show_fan(struct device *dev, struct device_attribute
+ *devattr, char *buf)
+{
+ struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
+ struct sch5627_data *data = sch5627_update_device(dev);
+ int val;
+
+ if (IS_ERR(data))
+ return PTR_ERR(data);
+
+ val = reg_to_rpm(data->fan[attr->index]);
+ if (val < 0)
+ return val;
+
+ return snprintf(buf, PAGE_SIZE, "%d\n", val);
+}
+
+static ssize_t show_fan_fault(struct device *dev, struct device_attribute
+ *devattr, char *buf)
+{
+ struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
+ struct sch5627_data *data = sch5627_update_device(dev);
+
+ if (IS_ERR(data))
+ return PTR_ERR(data);
+
+ return snprintf(buf, PAGE_SIZE, "%d\n",
+ data->fan[attr->index] == 0xffff);
+}
+
+static ssize_t show_fan_min(struct device *dev, struct device_attribute
+ *devattr, char *buf)
+{
+ struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
+ struct sch5627_data *data = dev_get_drvdata(dev);
+ int val = reg_to_rpm(data->fan_min[attr->index]);
+ if (val < 0)
+ return val;
+
+ return snprintf(buf, PAGE_SIZE, "%d\n", val);
+}
+
+static ssize_t show_in(struct device *dev, struct device_attribute
+ *devattr, char *buf)
+{
+ struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
+ struct sch5627_data *data = sch5627_update_device(dev);
+ int val;
+
+ if (IS_ERR(data))
+ return PTR_ERR(data);
+
+ val = DIV_ROUND_CLOSEST(
+ data->in[attr->index] * SCH5627_REG_IN_FACTOR[attr->index],
+ 10000);
+ return snprintf(buf, PAGE_SIZE, "%d\n", val);
+}
+
+static ssize_t show_in_label(struct device *dev, struct device_attribute
+ *devattr, char *buf)
+{
+ struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
+
+ return snprintf(buf, PAGE_SIZE, "%s\n",
+ SCH5627_IN_LABELS[attr->index]);
+}
+
+static DEVICE_ATTR(name, S_IRUGO, show_name, NULL);
+static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, show_temp, NULL, 0);
+static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO, show_temp, NULL, 1);
+static SENSOR_DEVICE_ATTR(temp3_input, S_IRUGO, show_temp, NULL, 2);
+static SENSOR_DEVICE_ATTR(temp4_input, S_IRUGO, show_temp, NULL, 3);
+static SENSOR_DEVICE_ATTR(temp5_input, S_IRUGO, show_temp, NULL, 4);
+static SENSOR_DEVICE_ATTR(temp6_input, S_IRUGO, show_temp, NULL, 5);
+static SENSOR_DEVICE_ATTR(temp7_input, S_IRUGO, show_temp, NULL, 6);
+static SENSOR_DEVICE_ATTR(temp8_input, S_IRUGO, show_temp, NULL, 7);
+static SENSOR_DEVICE_ATTR(temp1_fault, S_IRUGO, show_temp_fault, NULL, 0);
+static SENSOR_DEVICE_ATTR(temp2_fault, S_IRUGO, show_temp_fault, NULL, 1);
+static SENSOR_DEVICE_ATTR(temp3_fault, S_IRUGO, show_temp_fault, NULL, 2);
+static SENSOR_DEVICE_ATTR(temp4_fault, S_IRUGO, show_temp_fault, NULL, 3);
+static SENSOR_DEVICE_ATTR(temp5_fault, S_IRUGO, show_temp_fault, NULL, 4);
+static SENSOR_DEVICE_ATTR(temp6_fault, S_IRUGO, show_temp_fault, NULL, 5);
+static SENSOR_DEVICE_ATTR(temp7_fault, S_IRUGO, show_temp_fault, NULL, 6);
+static SENSOR_DEVICE_ATTR(temp8_fault, S_IRUGO, show_temp_fault, NULL, 7);
+static SENSOR_DEVICE_ATTR(temp1_max, S_IRUGO, show_temp_max, NULL, 0);
+static SENSOR_DEVICE_ATTR(temp2_max, S_IRUGO, show_temp_max, NULL, 1);
+static SENSOR_DEVICE_ATTR(temp3_max, S_IRUGO, show_temp_max, NULL, 2);
+static SENSOR_DEVICE_ATTR(temp4_max, S_IRUGO, show_temp_max, NULL, 3);
+static SENSOR_DEVICE_ATTR(temp5_max, S_IRUGO, show_temp_max, NULL, 4);
+static SENSOR_DEVICE_ATTR(temp6_max, S_IRUGO, show_temp_max, NULL, 5);
+static SENSOR_DEVICE_ATTR(temp7_max, S_IRUGO, show_temp_max, NULL, 6);
+static SENSOR_DEVICE_ATTR(temp8_max, S_IRUGO, show_temp_max, NULL, 7);
+static SENSOR_DEVICE_ATTR(temp1_crit, S_IRUGO, show_temp_crit, NULL, 0);
+static SENSOR_DEVICE_ATTR(temp2_crit, S_IRUGO, show_temp_crit, NULL, 1);
+static SENSOR_DEVICE_ATTR(temp3_crit, S_IRUGO, show_temp_crit, NULL, 2);
+static SENSOR_DEVICE_ATTR(temp4_crit, S_IRUGO, show_temp_crit, NULL, 3);
+static SENSOR_DEVICE_ATTR(temp5_crit, S_IRUGO, show_temp_crit, NULL, 4);
+static SENSOR_DEVICE_ATTR(temp6_crit, S_IRUGO, show_temp_crit, NULL, 5);
+static SENSOR_DEVICE_ATTR(temp7_crit, S_IRUGO, show_temp_crit, NULL, 6);
+static SENSOR_DEVICE_ATTR(temp8_crit, S_IRUGO, show_temp_crit, NULL, 7);
+
+static SENSOR_DEVICE_ATTR(fan1_input, S_IRUGO, show_fan, NULL, 0);
+static SENSOR_DEVICE_ATTR(fan2_input, S_IRUGO, show_fan, NULL, 1);
+static SENSOR_DEVICE_ATTR(fan3_input, S_IRUGO, show_fan, NULL, 2);
+static SENSOR_DEVICE_ATTR(fan4_input, S_IRUGO, show_fan, NULL, 3);
+static SENSOR_DEVICE_ATTR(fan1_fault, S_IRUGO, show_fan_fault, NULL, 0);
+static SENSOR_DEVICE_ATTR(fan2_fault, S_IRUGO, show_fan_fault, NULL, 1);
+static SENSOR_DEVICE_ATTR(fan3_fault, S_IRUGO, show_fan_fault, NULL, 2);
+static SENSOR_DEVICE_ATTR(fan4_fault, S_IRUGO, show_fan_fault, NULL, 3);
+static SENSOR_DEVICE_ATTR(fan1_min, S_IRUGO, show_fan_min, NULL, 0);
+static SENSOR_DEVICE_ATTR(fan2_min, S_IRUGO, show_fan_min, NULL, 1);
+static SENSOR_DEVICE_ATTR(fan3_min, S_IRUGO, show_fan_min, NULL, 2);
+static SENSOR_DEVICE_ATTR(fan4_min, S_IRUGO, show_fan_min, NULL, 3);
+
+static SENSOR_DEVICE_ATTR(in0_input, S_IRUGO, show_in, NULL, 0);
+static SENSOR_DEVICE_ATTR(in1_input, S_IRUGO, show_in, NULL, 1);
+static SENSOR_DEVICE_ATTR(in2_input, S_IRUGO, show_in, NULL, 2);
+static SENSOR_DEVICE_ATTR(in3_input, S_IRUGO, show_in, NULL, 3);
+static SENSOR_DEVICE_ATTR(in4_input, S_IRUGO, show_in, NULL, 4);
+static SENSOR_DEVICE_ATTR(in0_label, S_IRUGO, show_in_label, NULL, 0);
+static SENSOR_DEVICE_ATTR(in1_label, S_IRUGO, show_in_label, NULL, 1);
+static SENSOR_DEVICE_ATTR(in2_label, S_IRUGO, show_in_label, NULL, 2);
+static SENSOR_DEVICE_ATTR(in3_label, S_IRUGO, show_in_label, NULL, 3);
+
+static struct attribute *sch5627_attributes[] = {
+ &dev_attr_name.attr,
+
+ &sensor_dev_attr_temp1_input.dev_attr.attr,
+ &sensor_dev_attr_temp2_input.dev_attr.attr,
+ &sensor_dev_attr_temp3_input.dev_attr.attr,
+ &sensor_dev_attr_temp4_input.dev_attr.attr,
+ &sensor_dev_attr_temp5_input.dev_attr.attr,
+ &sensor_dev_attr_temp6_input.dev_attr.attr,
+ &sensor_dev_attr_temp7_input.dev_attr.attr,
+ &sensor_dev_attr_temp8_input.dev_attr.attr,
+ &sensor_dev_attr_temp1_fault.dev_attr.attr,
+ &sensor_dev_attr_temp2_fault.dev_attr.attr,
+ &sensor_dev_attr_temp3_fault.dev_attr.attr,
+ &sensor_dev_attr_temp4_fault.dev_attr.attr,
+ &sensor_dev_attr_temp5_fault.dev_attr.attr,
+ &sensor_dev_attr_temp6_fault.dev_attr.attr,
+ &sensor_dev_attr_temp7_fault.dev_attr.attr,
+ &sensor_dev_attr_temp8_fault.dev_attr.attr,
+ &sensor_dev_attr_temp1_max.dev_attr.attr,
+ &sensor_dev_attr_temp2_max.dev_attr.attr,
+ &sensor_dev_attr_temp3_max.dev_attr.attr,
+ &sensor_dev_attr_temp4_max.dev_attr.attr,
+ &sensor_dev_attr_temp5_max.dev_attr.attr,
+ &sensor_dev_attr_temp6_max.dev_attr.attr,
+ &sensor_dev_attr_temp7_max.dev_attr.attr,
+ &sensor_dev_attr_temp8_max.dev_attr.attr,
+ &sensor_dev_attr_temp1_crit.dev_attr.attr,
+ &sensor_dev_attr_temp2_crit.dev_attr.attr,
+ &sensor_dev_attr_temp3_crit.dev_attr.attr,
+ &sensor_dev_attr_temp4_crit.dev_attr.attr,
+ &sensor_dev_attr_temp5_crit.dev_attr.attr,
+ &sensor_dev_attr_temp6_crit.dev_attr.attr,
+ &sensor_dev_attr_temp7_crit.dev_attr.attr,
+ &sensor_dev_attr_temp8_crit.dev_attr.attr,
+
+ &sensor_dev_attr_fan1_input.dev_attr.attr,
+ &sensor_dev_attr_fan2_input.dev_attr.attr,
+ &sensor_dev_attr_fan3_input.dev_attr.attr,
+ &sensor_dev_attr_fan4_input.dev_attr.attr,
+ &sensor_dev_attr_fan1_fault.dev_attr.attr,
+ &sensor_dev_attr_fan2_fault.dev_attr.attr,
+ &sensor_dev_attr_fan3_fault.dev_attr.attr,
+ &sensor_dev_attr_fan4_fault.dev_attr.attr,
+ &sensor_dev_attr_fan1_min.dev_attr.attr,
+ &sensor_dev_attr_fan2_min.dev_attr.attr,
+ &sensor_dev_attr_fan3_min.dev_attr.attr,
+ &sensor_dev_attr_fan4_min.dev_attr.attr,
+
+ &sensor_dev_attr_in0_input.dev_attr.attr,
+ &sensor_dev_attr_in1_input.dev_attr.attr,
+ &sensor_dev_attr_in2_input.dev_attr.attr,
+ &sensor_dev_attr_in3_input.dev_attr.attr,
+ &sensor_dev_attr_in4_input.dev_attr.attr,
+ &sensor_dev_attr_in0_label.dev_attr.attr,
+ &sensor_dev_attr_in1_label.dev_attr.attr,
+ &sensor_dev_attr_in2_label.dev_attr.attr,
+ &sensor_dev_attr_in3_label.dev_attr.attr,
+ /* No in4_label as in4 is a generic input pin */
+
+ NULL
+};
+
+static const struct attribute_group sch5627_group = {
+ .attrs = sch5627_attributes,
+};
+
+static int sch5627_remove(struct platform_device *pdev)
+{
+ struct sch5627_data *data = platform_get_drvdata(pdev);
+
+ if (data->watchdog)
+ sch56xx_watchdog_unregister(data->watchdog);
+
+ if (data->hwmon_dev)
+ hwmon_device_unregister(data->hwmon_dev);
+
+ sysfs_remove_group(&pdev->dev.kobj, &sch5627_group);
+
+ return 0;
+}
+
+static int sch5627_probe(struct platform_device *pdev)
+{
+ struct sch5627_data *data;
+ int err, build_code, build_id, hwmon_rev, val;
+
+ data = devm_kzalloc(&pdev->dev, sizeof(struct sch5627_data),
+ GFP_KERNEL);
+ if (!data)
+ return -ENOMEM;
+
+ data->addr = platform_get_resource(pdev, IORESOURCE_IO, 0)->start;
+ mutex_init(&data->update_lock);
+ platform_set_drvdata(pdev, data);
+
+ val = sch56xx_read_virtual_reg(data->addr, SCH5627_REG_HWMON_ID);
+ if (val < 0) {
+ err = val;
+ goto error;
+ }
+ if (val != SCH5627_HWMON_ID) {
+ pr_err("invalid %s id: 0x%02X (expected 0x%02X)\n", "hwmon",
+ val, SCH5627_HWMON_ID);
+ err = -ENODEV;
+ goto error;
+ }
+
+ val = sch56xx_read_virtual_reg(data->addr, SCH5627_REG_COMPANY_ID);
+ if (val < 0) {
+ err = val;
+ goto error;
+ }
+ if (val != SCH5627_COMPANY_ID) {
+ pr_err("invalid %s id: 0x%02X (expected 0x%02X)\n", "company",
+ val, SCH5627_COMPANY_ID);
+ err = -ENODEV;
+ goto error;
+ }
+
+ val = sch56xx_read_virtual_reg(data->addr, SCH5627_REG_PRIMARY_ID);
+ if (val < 0) {
+ err = val;
+ goto error;
+ }
+ if (val != SCH5627_PRIMARY_ID) {
+ pr_err("invalid %s id: 0x%02X (expected 0x%02X)\n", "primary",
+ val, SCH5627_PRIMARY_ID);
+ err = -ENODEV;
+ goto error;
+ }
+
+ build_code = sch56xx_read_virtual_reg(data->addr,
+ SCH5627_REG_BUILD_CODE);
+ if (build_code < 0) {
+ err = build_code;
+ goto error;
+ }
+
+ build_id = sch56xx_read_virtual_reg16(data->addr,
+ SCH5627_REG_BUILD_ID);
+ if (build_id < 0) {
+ err = build_id;
+ goto error;
+ }
+
+ hwmon_rev = sch56xx_read_virtual_reg(data->addr,
+ SCH5627_REG_HWMON_REV);
+ if (hwmon_rev < 0) {
+ err = hwmon_rev;
+ goto error;
+ }
+
+ val = sch56xx_read_virtual_reg(data->addr, SCH5627_REG_CTRL);
+ if (val < 0) {
+ err = val;
+ goto error;
+ }
+ data->control = val;
+ if (!(data->control & 0x01)) {
+ pr_err("hardware monitoring not enabled\n");
+ err = -ENODEV;
+ goto error;
+ }
+ /* Trigger a Vbat voltage measurement, so that we get a valid reading
+ the first time we read Vbat */
+ sch56xx_write_virtual_reg(data->addr, SCH5627_REG_CTRL,
+ data->control | 0x10);
+ data->last_battery = jiffies;
+
+ /*
+ * Read limits, we do this only once as reading a register on
+ * the sch5627 is quite expensive (and they don't change).
+ */
+ err = sch5627_read_limits(data);
+ if (err)
+ goto error;
+
+ pr_info("found %s chip at %#hx\n", DEVNAME, data->addr);
+ pr_info("firmware build: code 0x%02X, id 0x%04X, hwmon: rev 0x%02X\n",
+ build_code, build_id, hwmon_rev);
+
+ /* Register sysfs interface files */
+ err = sysfs_create_group(&pdev->dev.kobj, &sch5627_group);
+ if (err)
+ goto error;
+
+ data->hwmon_dev = hwmon_device_register(&pdev->dev);
+ if (IS_ERR(data->hwmon_dev)) {
+ err = PTR_ERR(data->hwmon_dev);
+ data->hwmon_dev = NULL;
+ goto error;
+ }
+
+ /* Note failing to register the watchdog is not a fatal error */
+ data->watchdog = sch56xx_watchdog_register(&pdev->dev, data->addr,
+ (build_code << 24) | (build_id << 8) | hwmon_rev,
+ &data->update_lock, 1);
+
+ return 0;
+
+error:
+ sch5627_remove(pdev);
+ return err;
+}
+
+static struct platform_driver sch5627_driver = {
+ .driver = {
+ .owner = THIS_MODULE,
+ .name = DRVNAME,
+ },
+ .probe = sch5627_probe,
+ .remove = sch5627_remove,
+};
+
+module_platform_driver(sch5627_driver);
+
+MODULE_DESCRIPTION("SMSC SCH5627 Hardware Monitoring Driver");
+MODULE_AUTHOR("Hans de Goede <hdegoede@redhat.com>");
+MODULE_LICENSE("GPL");
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-11-04 01:42:19 +0000