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Date: Mon, 14 Jul 2014 05:54:46 -0700
From: Wei-Chun Pan <weichun.pan@...antech.com.tw>
To: Samuel Ortiz <sameo@...ux.intel.com>,
Lee Jones <lee.jones@...aro.org>,
Jean Delvare <jdelvare@...e.de>,
Guenter Roeck <linux@...ck-us.net>
CC: "Louis.Lu" <Louis.Lu@...antech.com.tw>,
"Neo.Lo" <neo.lo@...antech.com.tw>,
"Hank.Peng" <Hank.Peng@...antech.com.tw>,
"Kevin.Ong" <Kevin.Ong@...antech.com.tw>,
<linux-kernel@...r.kernel.org>,
Wei-Chun Pan <weichun.pan@...antech.com.tw>
Subject: [PATCH 4/4] hwmon: (imanager2) Add support for IT8516/18/28
Signed-off-by: Wei-Chun Pan <weichun.pan@...antech.com.tw>
---
drivers/hwmon/Kconfig | 5 +
drivers/hwmon/Makefile | 1 +
drivers/hwmon/imanager2_hwm.c | 768 ++++++++++++++++++++++++++++++++++++++++++
3 files changed, 774 insertions(+)
create mode 100644 drivers/hwmon/imanager2_hwm.c
diff --git a/drivers/hwmon/Kconfig b/drivers/hwmon/Kconfig
index bc196f4..7524fc3 100644
--- a/drivers/hwmon/Kconfig
+++ b/drivers/hwmon/Kconfig
@@ -39,6 +39,11 @@ config HWMON_DEBUG_CHIP
comment "Native drivers"
+config SENSORS_IMANAGER2
+ tristate "Support for Advantech iManager2 EC H.W. Monitor"
+ select MFD_CORE
+ depends on MFD_IMANAGER2
+
config SENSORS_AB8500
tristate "AB8500 thermal monitoring"
depends on AB8500_GPADC && AB8500_BM
diff --git a/drivers/hwmon/Makefile b/drivers/hwmon/Makefile
index c48f987..a2c8f07 100644
--- a/drivers/hwmon/Makefile
+++ b/drivers/hwmon/Makefile
@@ -146,6 +146,7 @@ obj-$(CONFIG_SENSORS_W83L785TS) += w83l785ts.o
obj-$(CONFIG_SENSORS_W83L786NG) += w83l786ng.o
obj-$(CONFIG_SENSORS_WM831X) += wm831x-hwmon.o
obj-$(CONFIG_SENSORS_WM8350) += wm8350-hwmon.o
+obj-$(CONFIG_SENSORS_IMANAGER2) += imanager2_hwm.o
obj-$(CONFIG_PMBUS) += pmbus/
diff --git a/drivers/hwmon/imanager2_hwm.c b/drivers/hwmon/imanager2_hwm.c
new file mode 100644
index 0000000..335bffb
--- /dev/null
+++ b/drivers/hwmon/imanager2_hwm.c
@@ -0,0 +1,768 @@
+/*
+ * imanager2_hwm.c - HW Monitoring interface for Advantech EC IT8516/18/28
+ * Copyright (C) 2014 Richard Vidal-Dorsch <richard.dorsch@...antech.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 3 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, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/hwmon.h>
+#include <linux/hwmon-sysfs.h>
+#include <linux/mfd/imanager2_ec.h>
+
+#define DRV_NAME "imanager2_hwm"
+#define DRV_VERSION "4.0.1"
+
+/* ADC */
+#define EC_ADC_RESOLUTION_MAX 0x03FF /* 10-bit */
+#define EC_ADC_VALUE_MAX 3000 /* max: 3000 mV or mA */
+
+/* Thermal */
+#define EC_THERMAL_ZONE_MAX 4
+
+enum thermaltype {
+ none,
+ sys1,
+ cpu,
+ sys3,
+ sys2,
+};
+
+struct ec_thermalzone {
+ u8 channel,
+ addr,
+ cmd,
+ status,
+ fancode,
+ temp;
+};
+
+/* Tacho */
+#define EC_MAX_IO_FAN 3
+
+/* Voltage */
+struct volt_item {
+ u8 did;
+ const char *name;
+ int factor;
+ bool visible;
+};
+
+static struct volt_item ec_volt_table[] = {
+ {
+ .did = adcmosbat,
+ .name = "BAT CMOS",
+ },
+ {
+ .did = adcbat,
+ .name = "BAT",
+ },
+ {
+ .did = adc5vs0,
+ .name = "5V S0",
+ },
+ {
+ .did = adv5vs5,
+ .name = "5V S5",
+ },
+ {
+ .did = adc33vs0,
+ .name = "3V3 S0",
+ },
+ {
+ .did = adc33vs5,
+ .name = "3V3 S5",
+ },
+ {
+ .did = adv12vs0,
+ .name = "12V S0",
+ },
+ {
+ .did = adcvcorea,
+ .name = "Vcore A",
+ },
+ {
+ .did = adcvcoreb,
+ .name = "Vcore B",
+ },
+ {
+ .did = adcdc,
+ .name = "DC",
+ },
+ {
+ .did = adcdcstby,
+ .name = "DC Standby",
+ },
+ {
+ .did = adcdcother,
+ .name = "DC Other",
+ },
+};
+
+static int imanager2_volt_get_value_by_io(struct imanager2 *ec, int index,
+ u8 *buf)
+{
+ u8 item = ec->table.devid2itemnum[ec_volt_table[index].did];
+ u8 pin = ec->table.pinnum[item];
+ u8 portnum;
+ int ret;
+
+ ret = imanager2_mbox_io_read(EC_CMD_ADC_INDEX, pin, &portnum, 1);
+ if (ret)
+ return ret;
+ if (portnum == EC_ERROR)
+ return -ENXIO;
+
+ ret = imanager2_mbox_io_simple_read(EC_CMD_ADC_READ_LSB, &buf[1]);
+ if (ret)
+ return ret;
+
+ return imanager2_mbox_io_simple_read(EC_CMD_ADC_READ_MSB, &buf[0]);
+}
+
+static int imanager2_volt_get_value(struct imanager2 *ec, int index,
+ u32 *volt_mvolt)
+{
+ int ret;
+ u8 tmp[2];
+
+ mutex_lock(&ec->lock);
+
+ if (ec->flag & EC_FLAG_MAILBOX)
+ ret = imanager2_mbox_read_data(ec->flag,
+ EC_CMD_MAILBOX_READ_HW_PIN,
+ ec_volt_table[index].did,
+ tmp, 2);
+ else
+ ret = imanager2_volt_get_value_by_io(ec, index, tmp);
+
+ mutex_unlock(&ec->lock);
+
+ if (ret)
+ return ret;
+
+ *volt_mvolt = (((tmp[0] << 8) | tmp[1]) & EC_ADC_RESOLUTION_MAX) *
+ ec_volt_table[index].factor *
+ DIV_ROUND_CLOSEST(EC_ADC_VALUE_MAX,
+ EC_ADC_RESOLUTION_MAX);
+
+ return 0;
+}
+
+static void imanager2_volt_init(struct imanager2 *ec)
+{
+ u8 did;
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(ec_volt_table); i++) {
+ did = ec_volt_table[i].did;
+
+ if (ec->table.devid2itemnum[did] != EC_TABLE_ITEM_UNUSED) {
+ ec_volt_table[i].factor = 1;
+ ec_volt_table[i].visible = true;
+ } else if (ec->table.devid2itemnum[did + 1] !=
+ EC_TABLE_ITEM_UNUSED) {
+ ec_volt_table[i].did += 1;
+ ec_volt_table[i].factor = 2;
+ ec_volt_table[i].visible = true;
+ } else if (ec->table.devid2itemnum[did + 2] !=
+ EC_TABLE_ITEM_UNUSED) {
+ ec_volt_table[i].did += 2;
+ ec_volt_table[i].factor = 10;
+ ec_volt_table[i].visible = true;
+ } else {
+ ec_volt_table[i].visible = false;
+ }
+ }
+}
+
+static ssize_t show_in(struct device *dev, struct device_attribute *dev_attr,
+ char *buf)
+{
+ struct imanager2 *ec = dev_get_drvdata(dev);
+ u32 val;
+ int ret = imanager2_volt_get_value(ec,
+ to_sensor_dev_attr(dev_attr)->index,
+ &val);
+ if (ret)
+ return ret;
+
+ return sprintf(buf, "%u\n", val);
+}
+
+static ssize_t show_in_label(struct device *dev,
+ struct device_attribute *dev_attr, char *buf)
+{
+ return sprintf(buf, "%s\n",
+ ec_volt_table[to_sensor_dev_attr(dev_attr)->index].name);
+}
+
+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(in5_input, S_IRUGO, show_in, NULL, 5);
+static SENSOR_DEVICE_ATTR(in6_input, S_IRUGO, show_in, NULL, 6);
+static SENSOR_DEVICE_ATTR(in7_input, S_IRUGO, show_in, NULL, 7);
+static SENSOR_DEVICE_ATTR(in8_input, S_IRUGO, show_in, NULL, 8);
+static SENSOR_DEVICE_ATTR(in9_input, S_IRUGO, show_in, NULL, 9);
+static SENSOR_DEVICE_ATTR(in10_input, S_IRUGO, show_in, NULL, 10);
+static SENSOR_DEVICE_ATTR(in11_input, S_IRUGO, show_in, NULL, 11);
+
+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 SENSOR_DEVICE_ATTR(in4_label, S_IRUGO, show_in_label, NULL, 4);
+static SENSOR_DEVICE_ATTR(in5_label, S_IRUGO, show_in_label, NULL, 5);
+static SENSOR_DEVICE_ATTR(in6_label, S_IRUGO, show_in_label, NULL, 6);
+static SENSOR_DEVICE_ATTR(in7_label, S_IRUGO, show_in_label, NULL, 7);
+static SENSOR_DEVICE_ATTR(in8_label, S_IRUGO, show_in_label, NULL, 8);
+static SENSOR_DEVICE_ATTR(in9_label, S_IRUGO, show_in_label, NULL, 9);
+static SENSOR_DEVICE_ATTR(in10_label, S_IRUGO, show_in_label, NULL, 10);
+static SENSOR_DEVICE_ATTR(in11_label, S_IRUGO, show_in_label, NULL, 11);
+
+static struct attribute *imanager2_volt_attrs[] = {
+ &sensor_dev_attr_in0_label.dev_attr.attr,
+ &sensor_dev_attr_in0_input.dev_attr.attr,
+
+ &sensor_dev_attr_in1_label.dev_attr.attr,
+ &sensor_dev_attr_in1_input.dev_attr.attr,
+
+ &sensor_dev_attr_in2_label.dev_attr.attr,
+ &sensor_dev_attr_in2_input.dev_attr.attr,
+
+ &sensor_dev_attr_in3_label.dev_attr.attr,
+ &sensor_dev_attr_in3_input.dev_attr.attr,
+
+ &sensor_dev_attr_in4_label.dev_attr.attr,
+ &sensor_dev_attr_in4_input.dev_attr.attr,
+
+ &sensor_dev_attr_in5_label.dev_attr.attr,
+ &sensor_dev_attr_in5_input.dev_attr.attr,
+
+ &sensor_dev_attr_in6_label.dev_attr.attr,
+ &sensor_dev_attr_in6_input.dev_attr.attr,
+
+ &sensor_dev_attr_in7_label.dev_attr.attr,
+ &sensor_dev_attr_in7_input.dev_attr.attr,
+
+ &sensor_dev_attr_in8_label.dev_attr.attr,
+ &sensor_dev_attr_in8_input.dev_attr.attr,
+
+ &sensor_dev_attr_in9_label.dev_attr.attr,
+ &sensor_dev_attr_in9_input.dev_attr.attr,
+
+ &sensor_dev_attr_in10_label.dev_attr.attr,
+ &sensor_dev_attr_in10_input.dev_attr.attr,
+
+ &sensor_dev_attr_in11_label.dev_attr.attr,
+ &sensor_dev_attr_in11_input.dev_attr.attr,
+
+ NULL
+};
+
+static umode_t imanager2_volt_mode(struct kobject *kobj, struct attribute *attr,
+ int index)
+{
+ struct device_attribute *dev_attr;
+
+ dev_attr = container_of(attr, struct device_attribute, attr);
+ if (!ec_volt_table[to_sensor_dev_attr(dev_attr)->index].visible)
+ return 0;
+
+ return attr->mode;
+}
+
+static const struct attribute_group imanager2_volt_group = {
+ .attrs = imanager2_volt_attrs,
+ .is_visible = imanager2_volt_mode,
+};
+
+/* Current */
+struct curr_item {
+ const u8 did;
+ const char *name;
+ bool visible;
+};
+
+static struct curr_item ec_curr_table[] = {
+ {
+ .did = adccurrent,
+ .name = "IMON"
+ },
+};
+
+static int imanager2_curr_get_value(struct imanager2 *ec, int index,
+ u32 *curr_mamp)
+{
+ int ret;
+ u8 tmp[5];
+ u16 value, factor;
+ u32 baseunit = 1;
+
+ mutex_lock(&ec->lock);
+ ret = imanager2_mbox_read_data(ec->flag, EC_CMD_MAILBOX_READ_HW_PIN,
+ ec_curr_table[index].did, tmp,
+ ARRAY_SIZE(tmp));
+ mutex_unlock(&ec->lock);
+
+ if (ret)
+ return ret;
+
+ value = ((tmp[0] << 8) | tmp[1]) & EC_ADC_RESOLUTION_MAX;
+ factor = (tmp[2] << 8) | tmp[3];
+
+ while (tmp[4]++)
+ baseunit *= 10;
+
+ *curr_mamp = DIV_ROUND_CLOSEST(value * baseunit * EC_ADC_VALUE_MAX,
+ EC_ADC_RESOLUTION_MAX * factor);
+
+ return 0;
+}
+
+static void imanager2_curr_init(struct imanager2 *ec)
+{
+ u8 did;
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(ec_curr_table); i++) {
+ did = ec_curr_table[i].did;
+ if (ec->table.devid2itemnum[did] != EC_TABLE_ITEM_UNUSED)
+ ec_curr_table[i].visible = ec->flag & EC_FLAG_MAILBOX;
+ else
+ ec_curr_table[i].visible = false;
+ }
+}
+
+static ssize_t show_curr(struct device *dev, struct device_attribute *dev_attr,
+ char *buf)
+{
+ struct imanager2 *ec = dev_get_drvdata(dev);
+ u32 val;
+ int ret = imanager2_curr_get_value(ec,
+ to_sensor_dev_attr(dev_attr)->index,
+ &val);
+ if (ret)
+ return ret;
+
+ return sprintf(buf, "%u\n", val);
+}
+
+static ssize_t show_curr_label(struct device *dev,
+ struct device_attribute *dev_attr, char *buf)
+{
+ return sprintf(buf, "%s\n",
+ ec_curr_table[to_sensor_dev_attr(dev_attr)->index].name);
+}
+
+static SENSOR_DEVICE_ATTR(curr1_input, S_IRUGO, show_curr, NULL, 0);
+static SENSOR_DEVICE_ATTR(curr1_label, S_IRUGO, show_curr_label, NULL, 0);
+
+static struct attribute *imanager2_curr_attrs[] = {
+ &sensor_dev_attr_curr1_label.dev_attr.attr,
+ &sensor_dev_attr_curr1_input.dev_attr.attr,
+
+ NULL
+};
+
+static umode_t imanager2_curr_mode(struct kobject *kobj, struct attribute *attr,
+ int index)
+{
+ struct device_attribute *dev_attr;
+
+ dev_attr = container_of(attr, struct device_attribute, attr);
+ if (!ec_curr_table[to_sensor_dev_attr(dev_attr)->index].visible)
+ return 0;
+
+ return attr->mode;
+}
+
+static const struct attribute_group imanager2_curr_group = {
+ .attrs = imanager2_curr_attrs,
+ .is_visible = imanager2_curr_mode,
+};
+
+/* Temperature */
+struct temp_item {
+ const char *name;
+ const u8 zonetype_value;
+ u8 zonetype_acpireg;
+ bool visible;
+};
+
+static struct temp_item ec_temp_table[] = {
+ {
+ .name = "Temp SYS",
+ .zonetype_value = sys1,
+ .zonetype_acpireg = EC_ACPIRAM_ADDR_LOCAL_TEMPERATURE(1)
+ },
+ {
+ .name = "Temp CPU",
+ .zonetype_value = cpu,
+ .zonetype_acpireg = EC_ACPIRAM_ADDR_REMOTE_TEMPERATURE(1)
+ },
+ {
+ .name = "Temp SYS3",
+ .zonetype_value = sys3,
+ .zonetype_acpireg = EC_ACPIRAM_ADDR_LOCAL_TEMPERATURE(2)
+ },
+ {
+ .name = "Temp SYS2",
+ .zonetype_value = sys2,
+ .zonetype_acpireg = EC_ACPIRAM_ADDR_REMOTE_TEMPERATURE(2)
+ },
+};
+
+static int imanager2_temp_get_value(struct imanager2 *ec, int index,
+ s32 *temp_mcelsius)
+{
+ int ret;
+ s8 tmp;
+
+ mutex_lock(&ec->lock);
+ ret = imanager2_mbox_read_ram_support_io(
+ ec->flag, EC_RAM_BANK_ACPI,
+ ec_temp_table[index].zonetype_acpireg,
+ (u8 *)&tmp, 1);
+ mutex_unlock(&ec->lock);
+
+ if (ret)
+ return ret;
+
+ *temp_mcelsius = tmp * 1000;
+
+ return 0;
+}
+
+static void imanager2_temp_init(struct imanager2 *ec)
+{
+ int i, thm, ret;
+ u8 tmltype, smbid, fanid;
+ struct ec_thermalzone zone;
+
+ for (i = 0; i < ARRAY_SIZE(ec_temp_table); i++)
+ ec_temp_table[i].visible = false;
+
+ for (thm = 0; thm < EC_THERMAL_ZONE_MAX; thm++) {
+ mutex_lock(&ec->lock);
+
+ if (ec->flag & EC_FLAG_MAILBOX) {
+ int len = sizeof(struct ec_thermalzone);
+ ret = imanager2_mbox_read_thermalzone(ec->flag, thm,
+ &smbid, &fanid,
+ (u8 *)&zone,
+ &len);
+ } else {
+ ret = imanager2_mbox_io_read(
+ EC_CMD_HWRAM_READ,
+ EC_HWRAM_ADDR_THERMAL_SOURCE_SMB_STATUS(thm),
+ &zone.status, 1);
+ }
+
+ mutex_unlock(&ec->lock);
+
+ if (ret)
+ continue;
+
+ tmltype = (zone.status >> 5);
+
+ for (i = 0; i < ARRAY_SIZE(ec_temp_table); i++) {
+ if (tmltype == ec_temp_table[i].zonetype_value) {
+ ec_temp_table[i].visible = true;
+ break;
+ }
+ }
+ }
+}
+
+static ssize_t show_temp(struct device *dev, struct device_attribute *dev_attr,
+ char *buf)
+{
+ struct imanager2 *ec = dev_get_drvdata(dev);
+ s32 val;
+ int ret = imanager2_temp_get_value(ec,
+ to_sensor_dev_attr(dev_attr)->index,
+ &val);
+ if (ret)
+ return ret;
+
+ return sprintf(buf, "%d\n", val);
+}
+
+static ssize_t show_temp_label(struct device *dev,
+ struct device_attribute *dev_attr, char *buf)
+{
+ return sprintf(buf, "%s\n",
+ ec_temp_table[to_sensor_dev_attr(dev_attr)->index].name);
+}
+
+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(temp1_label, S_IRUGO, show_temp_label, NULL, 0);
+static SENSOR_DEVICE_ATTR(temp2_label, S_IRUGO, show_temp_label, NULL, 1);
+static SENSOR_DEVICE_ATTR(temp3_label, S_IRUGO, show_temp_label, NULL, 2);
+static SENSOR_DEVICE_ATTR(temp4_label, S_IRUGO, show_temp_label, NULL, 3);
+
+static struct attribute *imanager2_temp_attrs[] = {
+ &sensor_dev_attr_temp1_label.dev_attr.attr,
+ &sensor_dev_attr_temp1_input.dev_attr.attr,
+
+ &sensor_dev_attr_temp2_label.dev_attr.attr,
+ &sensor_dev_attr_temp2_input.dev_attr.attr,
+
+ &sensor_dev_attr_temp3_label.dev_attr.attr,
+ &sensor_dev_attr_temp3_input.dev_attr.attr,
+
+ &sensor_dev_attr_temp4_label.dev_attr.attr,
+ &sensor_dev_attr_temp4_input.dev_attr.attr,
+
+ NULL
+};
+
+static umode_t imanager2_temp_mode(struct kobject *kobj, struct attribute *attr,
+ int index)
+{
+ struct device_attribute *dev_attr;
+
+ dev_attr = container_of(attr, struct device_attribute, attr);
+ if (!ec_temp_table[to_sensor_dev_attr(dev_attr)->index].visible)
+ return 0;
+
+ return attr->mode;
+}
+
+static const struct attribute_group imanager2_temp_group = {
+ .attrs = imanager2_temp_attrs,
+ .is_visible = imanager2_temp_mode,
+};
+
+/* Fan Speed */
+struct fan_item {
+ const u8 did;
+ const char *name;
+ u8 fspeed_acpireg;
+ bool visible;
+};
+
+static struct fan_item ec_fan_table[] = {
+ {
+ .did = tacho0,
+ .name = "Fan CPU",
+ .fspeed_acpireg = 0,
+ .visible = false
+ },
+ {
+ .did = tacho1,
+ .name = "Fan SYS",
+ .fspeed_acpireg = 0,
+ .visible = false
+ },
+ {
+ .did = tacho2,
+ .name = "Fan SYS2",
+ .fspeed_acpireg = 0,
+ .visible = false
+ },
+};
+
+static int imanager2_fan_get_value(struct imanager2 *ec, int index,
+ u32 *speed_rpm)
+{
+ int ret;
+ u8 tmp[2];
+
+ mutex_lock(&ec->lock);
+
+ if (ec->flag & EC_FLAG_MAILBOX)
+ ret = imanager2_mbox_read_data(ec->flag,
+ EC_CMD_MAILBOX_READ_HW_PIN,
+ ec_fan_table[index].did, tmp, 2);
+ else
+ ret = imanager2_mbox_io_read(EC_CMD_ACPIRAM_READ,
+ ec_fan_table[index].fspeed_acpireg,
+ tmp, 2);
+
+ mutex_unlock(&ec->lock);
+
+ if (ret)
+ return ret;
+
+ if (tmp[0] == 0xFF && tmp[1] == 0xFF)
+ return -ENODEV;
+
+ *speed_rpm = (tmp[0] << 8) | tmp[1];
+
+ return 0;
+}
+
+#define EC_FANCTROL_SPEEDSRC_MASK 0x30
+
+static int imanager2_fan_item_init_by_io(struct imanager2 *ec, int fnum)
+{
+ int i, ret;
+ u8 tmp;
+
+ mutex_lock(&ec->lock);
+ ret = imanager2_mbox_io_read(EC_CMD_HWRAM_READ,
+ EC_HWRAM_ADDR_FAN_CONTROL(fnum), &tmp, 1);
+ mutex_unlock(&ec->lock);
+
+ if (ret)
+ return ret;
+
+ i = ((tmp & EC_FANCTROL_SPEEDSRC_MASK) >> 4) - 1;
+ if (i < 0)
+ return -ENODEV;
+
+ /* Unnecessary set again if it has been set. */
+ if (ec_fan_table[i].visible)
+ return 0;
+
+ ec_fan_table[i].fspeed_acpireg = EC_ACPIRAM_ADDR_FAN_SPEED_BASE(i);
+ ec_fan_table[i].visible = true;
+
+ return 0;
+}
+
+static void imanager2_fan_init(struct imanager2 *ec)
+{
+ int i;
+
+ if (ec->flag & EC_FLAG_MAILBOX) {
+ for (i = 0; i < ARRAY_SIZE(ec_fan_table); i++)
+ ec_fan_table[i].visible =
+ ec->table.devid2itemnum[ec_fan_table[i].did] !=
+ EC_TABLE_ITEM_UNUSED;
+ } else {
+ int fnum;
+
+ for (i = 0; i < ARRAY_SIZE(ec_fan_table); i++)
+ ec_fan_table[i].visible = false;
+
+ for (fnum = 0; fnum < EC_MAX_IO_FAN; fnum++) {
+ if (imanager2_fan_item_init_by_io(ec, fnum))
+ continue;
+ }
+ }
+}
+
+static ssize_t show_fan(struct device *dev, struct device_attribute *dev_attr,
+ char *buf)
+{
+ struct imanager2 *ec = dev_get_drvdata(dev);
+ u32 val;
+ int ret = imanager2_fan_get_value(ec,
+ to_sensor_dev_attr(dev_attr)->index,
+ &val);
+ if (ret)
+ return ret;
+
+ return sprintf(buf, "%u\n", val);
+}
+
+static ssize_t show_fan_label(struct device *dev,
+ struct device_attribute *dev_attr, char *buf)
+{
+ return sprintf(buf, "%s\n",
+ ec_fan_table[to_sensor_dev_attr(dev_attr)->index].name);
+}
+
+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(fan1_label, S_IRUGO, show_fan_label, NULL, 0);
+static SENSOR_DEVICE_ATTR(fan2_label, S_IRUGO, show_fan_label, NULL, 1);
+static SENSOR_DEVICE_ATTR(fan3_label, S_IRUGO, show_fan_label, NULL, 2);
+
+static struct attribute *imanager2_fan_attrs[] = {
+ &sensor_dev_attr_fan1_label.dev_attr.attr,
+ &sensor_dev_attr_fan1_input.dev_attr.attr,
+
+ &sensor_dev_attr_fan2_label.dev_attr.attr,
+ &sensor_dev_attr_fan2_input.dev_attr.attr,
+
+ &sensor_dev_attr_fan3_label.dev_attr.attr,
+ &sensor_dev_attr_fan3_input.dev_attr.attr,
+
+ NULL
+};
+
+static umode_t imanager2_fan_mode(struct kobject *kobj, struct attribute *attr,
+ int index)
+{
+ struct device_attribute *dev_attr;
+
+ dev_attr = container_of(attr, struct device_attribute, attr);
+ if (!ec_fan_table[to_sensor_dev_attr(dev_attr)->index].visible)
+ return 0;
+
+ return attr->mode;
+}
+
+static const struct attribute_group imanager2_fan_group = {
+ .attrs = imanager2_fan_attrs,
+ .is_visible = imanager2_fan_mode,
+};
+
+/* Module */
+static const struct attribute_group *imanager2_hwmon_groups[] = {
+ &imanager2_volt_group,
+ &imanager2_curr_group,
+ &imanager2_temp_group,
+ &imanager2_fan_group,
+ NULL
+};
+
+static int imanager2_hwmon_probe(struct platform_device *pdev)
+{
+ struct device *hwmon_dev;
+ struct imanager2 *hwmon_ec = pdev->dev.parent->platform_data;
+
+ imanager2_volt_init(hwmon_ec);
+ imanager2_curr_init(hwmon_ec);
+ imanager2_temp_init(hwmon_ec);
+ imanager2_fan_init(hwmon_ec);
+
+ hwmon_dev = devm_hwmon_device_register_with_groups(
+ &pdev->dev, "imanager2", hwmon_ec,
+ imanager2_hwmon_groups);
+
+ if (IS_ERR(hwmon_dev))
+ return PTR_ERR(hwmon_dev);
+
+ return 0;
+}
+
+static struct platform_driver imanager2_hwmon_driver = {
+ .probe = imanager2_hwmon_probe,
+ .driver = {
+ .owner = THIS_MODULE,
+ .name = DRV_NAME,
+ },
+};
+
+module_platform_driver(imanager2_hwmon_driver);
+
+MODULE_AUTHOR("Richard Vidal-Dorsch <richard.dorsch at advantech.com>");
+MODULE_DESCRIPTION("HW Monitoring interface for Advantech EC IT8516/18/28");
+MODULE_LICENSE("GPL");
+MODULE_VERSION(DRV_VERSION);
--
1.9.1
--
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