[PATCH v5 5/6] hwmon: ahc1ec0-hwmon: Add sub-device hwmon for Advantech embedded controller
From: Campion Kang
Date: Thu Dec 31 2020 - 07:52:47 EST
This is one of sub-device driver for Advantech embedded controller
AHC1EC0. This driver provides sysfs ABI for Advantech related
applications to monitor the system status.
Signed-off-by: Campion Kang <campion.kang@xxxxxxxxxxxxxxxx>
---
drivers/hwmon/Kconfig | 10 +
drivers/hwmon/Makefile | 1 +
drivers/hwmon/ahc1ec0-hwmon.c | 398 ++++++++++++++++++++++++++++++++++
3 files changed, 409 insertions(+)
create mode 100644 drivers/hwmon/ahc1ec0-hwmon.c
diff --git a/drivers/hwmon/Kconfig b/drivers/hwmon/Kconfig
index 1ecf697d8d99..cf4a0eb863b0 100644
--- a/drivers/hwmon/Kconfig
+++ b/drivers/hwmon/Kconfig
@@ -2139,6 +2139,16 @@ config SENSORS_INTEL_M10_BMC_HWMON
sensors monitor various telemetry data of different components on the
card, e.g. board temperature, FPGA core temperature/voltage/current.
+config SENSORS_AHC1EC0_HWMON
+ tristate "Advantech AHC1 EC Hardware Monitor Function"
+ depends on MFD_AHC1EC0
+ help
+ This driver provide support for the hardware monitoring functionality
+ for Advantech AHC1EC0 embedded controller on the board.
+
+ This driver provides the sysfs attributes for applications to monitor
+ the system status, including system temperatures, voltages, current.
+
if ACPI
comment "ACPI drivers"
diff --git a/drivers/hwmon/Makefile b/drivers/hwmon/Makefile
index 09a86c5e1d29..0c37747e8c4f 100644
--- a/drivers/hwmon/Makefile
+++ b/drivers/hwmon/Makefile
@@ -45,6 +45,7 @@ obj-$(CONFIG_SENSORS_ADT7411) += adt7411.o
obj-$(CONFIG_SENSORS_ADT7462) += adt7462.o
obj-$(CONFIG_SENSORS_ADT7470) += adt7470.o
obj-$(CONFIG_SENSORS_ADT7475) += adt7475.o
+obj-$(CONFIG_SENSORS_AHC1EC0_HWMON) += ahc1ec0-hwmon.o
obj-$(CONFIG_SENSORS_AMD_ENERGY) += amd_energy.o
obj-$(CONFIG_SENSORS_APPLESMC) += applesmc.o
obj-$(CONFIG_SENSORS_ARM_SCMI) += scmi-hwmon.o
diff --git a/drivers/hwmon/ahc1ec0-hwmon.c b/drivers/hwmon/ahc1ec0-hwmon.c
new file mode 100644
index 000000000000..a05d2c0a25ad
--- /dev/null
+++ b/drivers/hwmon/ahc1ec0-hwmon.c
@@ -0,0 +1,398 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * HWMON Driver for Advantech Embedded Controller chip AHC1EC0
+ *
+ * Copyright 2020, Advantech IIoT Group
+ *
+ */
+
+#include <asm/msr-index.h>
+#include <asm/msr.h>
+#include <linux/delay.h>
+#include <linux/device.h>
+#include <linux/errno.h>
+#include <linux/errno.h>
+#include <linux/hwmon-sysfs.h>
+#include <linux/hwmon.h>
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/mfd/ahc1ec0.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/sched.h>
+#include <linux/slab.h>
+#include <linux/string.h>
+#include <linux/sysfs.h>
+#include <linux/types.h>
+#include <linux/uaccess.h>
+#include <linux/version.h>
+#include <linux/wait.h>
+
+struct adv_hwmon_profile {
+ int offset;
+ unsigned long resolution, resolution_vin, resolution_sys, resolution_curr, resolution_power;
+ unsigned long r1, r1_vin, r1_sys, r1_curr, r1_power;
+ unsigned long r2, r2_vin, r2_sys, r2_curr, r2_power;
+ const struct attribute_group ec_hwmon_group;
+};
+
+struct EC_HWMON_DATA {
+ unsigned char temperature[3];
+ unsigned char ec_current[5];
+ unsigned char power[5];
+ char *bios_product_name;
+ int voltage[7];
+
+ struct device *dev, *hwmon_dev;
+ struct HW_PIN_TBL pin_tbl;
+ struct EC_SMBOEM0 ec_smboem0;
+ struct adv_hwmon_profile *profile;
+};
+struct EC_HWMON_DATA lmsensor_data;
+
+static ssize_t get_ec_in1_label(struct device *dev, struct device_attribute *attr, char *buf)
+{
+ return sprintf(buf, "VBAT\n");
+}
+
+static ssize_t get_ec_in2_label(struct device *dev, struct device_attribute *attr, char *buf)
+{
+ return sprintf(buf, "5VSB\n");
+}
+
+static ssize_t get_ec_in3_label(struct device *dev, struct device_attribute *attr, char *buf)
+{
+ return sprintf(buf, "VIN\n");
+}
+
+static ssize_t get_ec_in4_label(struct device *dev, struct device_attribute *attr, char *buf)
+{
+ return sprintf(buf, "VCORE\n");
+}
+
+static ssize_t get_ec_temp2_label(struct device *dev, struct device_attribute *attr, char *buf)
+{
+ return sprintf(buf, "Temp CPU\n");
+}
+
+static ssize_t get_ec_temp2_crit(struct device *dev, struct device_attribute *attr, char *buf)
+{
+ return sprintf(buf, "100000\n");
+}
+
+static ssize_t get_ec_temp2_crit_alarm(struct device *dev, struct device_attribute *attr, char *buf)
+{
+ return sprintf(buf, "0\n");
+}
+
+static ssize_t get_ec_in1_input(struct device *dev, struct device_attribute *attr, char *buf)
+{
+ unsigned char temp;
+ unsigned char voltage = 0;
+ struct HW_PIN_TBL *ptbl = &lmsensor_data.pin_tbl;
+ struct adv_hwmon_profile *profile = lmsensor_data.profile;
+ struct adv_ec_platform_data *adv_ec_data = dev_get_drvdata(dev);
+
+ temp = read_ad_value(adv_ec_data, ptbl->vbat[0], ptbl->vbat[1]);
+
+ if (profile->r2 != 0)
+ voltage = temp * (profile->r1 + profile->r2) / profile->r2;
+
+ if (profile->resolution != 0)
+ voltage = temp * profile->resolution / 1000 / 1000;
+
+ if (profile->offset != 0)
+ voltage += (int)profile->offset * 100;
+
+ lmsensor_data.voltage[0] = 10*voltage;
+
+ return sprintf(buf, "%d\n", lmsensor_data.voltage[0]);
+}
+
+static ssize_t get_ec_in2_input(struct device *dev, struct device_attribute *attr, char *buf)
+{
+ unsigned char temp;
+ unsigned char voltage = 0;
+ struct HW_PIN_TBL *ptbl = &lmsensor_data.pin_tbl;
+ struct adv_hwmon_profile *profile = lmsensor_data.profile;
+ struct adv_ec_platform_data *adv_ec_data = dev_get_drvdata(dev);
+
+ temp = read_ad_value(adv_ec_data, ptbl->v5[0], ptbl->v5[1]);
+
+ if (profile->r2 != 0)
+ voltage = temp * (profile->r1 + profile->r2) / profile->r2;
+
+ if (profile->resolution != 0)
+ voltage = temp * profile->resolution / 1000 / 1000;
+
+ if (profile->offset != 0)
+ voltage += (int)profile->offset * 100;
+
+ lmsensor_data.voltage[1] = 10*voltage;
+
+ return sprintf(buf, "%d\n", lmsensor_data.voltage[1]);
+}
+
+static ssize_t get_ec_in3_input(struct device *dev, struct device_attribute *attr, char *buf)
+{
+ unsigned char temp;
+ unsigned char voltage = 0;
+ struct HW_PIN_TBL *ptbl = &lmsensor_data.pin_tbl;
+ struct adv_hwmon_profile *profile = lmsensor_data.profile;
+ struct adv_ec_platform_data *adv_ec_data = dev_get_drvdata(dev);
+
+
+ temp = read_ad_value(adv_ec_data, ptbl->v12[0], ptbl->v12[1]);
+ if (temp == -1)
+ temp = read_ad_value(adv_ec_data, ptbl->vdc[0], ptbl->vdc[1]);
+
+ if (profile->r2 != 0)
+ voltage = temp * (profile->r1 + profile->r2) / profile->r2;
+
+ if (profile->resolution != 0)
+ voltage = temp * profile->resolution / 1000 / 1000;
+
+ if (profile->offset != 0)
+ voltage += (int)profile->offset * 100;
+
+ lmsensor_data.voltage[2] = 10*voltage;
+
+ return sprintf(buf, "%d\n", lmsensor_data.voltage[2]);
+}
+
+static ssize_t get_ec_in4_input(struct device *dev, struct device_attribute *attr, char *buf)
+{
+ unsigned char temp;
+ unsigned char voltage = 0;
+ struct HW_PIN_TBL *ptbl = &lmsensor_data.pin_tbl;
+ struct adv_hwmon_profile *profile = lmsensor_data.profile;
+ struct adv_ec_platform_data *adv_ec_data = dev_get_drvdata(dev);
+
+ temp = read_ad_value(adv_ec_data, ptbl->vcore[0], ptbl->vcore[1]);
+
+ if (profile->r2 != 0)
+ voltage = temp * (profile->r1 + profile->r2) / profile->r2;
+
+ if (profile->resolution != 0)
+ voltage = temp * profile->resolution / 1000 / 1000;
+
+ if (profile->offset != 0)
+ voltage += (int)profile->offset * 100;
+
+ lmsensor_data.voltage[3] = 10*voltage;
+
+ return sprintf(buf, "%d\n", lmsensor_data.voltage[3]);
+}
+
+
+static ssize_t get_ec_temp2_input(struct device *dev, struct device_attribute *attr, char *buf)
+{
+ unsigned char value = 0;
+ struct adv_ec_platform_data *adv_ec_data = dev_get_drvdata(dev);
+
+ read_acpi_value(adv_ec_data, 0x61, &value);
+ return sprintf(buf, "%d\n", 1000*value);
+}
+
+static struct adv_hwmon_profile advec_profile[] = {
+ /*
+ * TPC-8100TR, TPC-651T-E3AE, TPC-1251T-E3AE, TPC-1551T-E3AE,
+ * TPC-1751T-E3AE, TPC-1051WP-E3AE, TPC-1551WP-E3AE, TPC-1581WP-433AE,
+ * TPC-1782H-433AE, UNO-1483G-434AE, UNO-2483G-434AE, UNO-3483G-374AE,
+ * UNO-2473G, UNO-2484G-6???AE, UNO-2484G-7???AE, UNO-3283G-674AE,
+ * UNO-3285G-674AE
+ * (0)
+ */
+ {
+ .resolution = 2929,
+ .r1 = 1912,
+ .r2 = 1000,
+ .offset = 0,
+ //.ec_hwmon_group.attrs = (struct attribute **)ec_hwmon_attrs_TEMPLATE,
+ },
+ /*
+ * TPC-B500-6??AE, TPC-5???T-6??AE, TPC-5???W-6??AE, TPC-B200-???AE,
+ * TPC-2???T-???AE, TPC-2???W-???AE
+ * (1)
+ */
+ {
+ .resolution = 2929,
+ .r1 = 1912,
+ .r2 = 1000,
+ .offset = 0,
+ //.ec_hwmon_group.attrs = (struct attribute **)ec_hwmon_attrs_TPC5XXX,
+ },
+ /* PR/VR4 (2) */
+ {
+ .resolution = 2929,
+ .r1 = 1912,
+ .r2 = 1000,
+ .offset = 0,
+ },
+ /* UNO-2271G-E22AE/E23AE/E022AE/E023AE,UNO-420 (3) */
+ {
+ .resolution = 2929,
+ .r1 = 1912,
+ .r2 = 1000,
+ .offset = 0,
+ //.ec_hwmon_group.attrs = (struct attribute **)ec_hwmon_attrs_UNO2271G,
+ },
+};
+
+static void adv_ec_init_hwmon_profile(u32 profile, struct adv_ec_platform_data *adv_ec_data)
+{
+ int i;
+ struct HW_PIN_TBL *ptbl = &lmsensor_data.pin_tbl;
+ struct Dynamic_Tab *dym_tbl = adv_ec_data->dym_tbl;
+
+ lmsensor_data.bios_product_name = adv_ec_data->bios_product_name;
+ dev_info(adv_ec_data->dev, "BIOS Product Name = %s\n", lmsensor_data.bios_product_name);
+
+ lmsensor_data.profile = &advec_profile[profile];
+
+ for (i = 0; i < EC_MAX_TBL_NUM ; i++) {
+ switch (dym_tbl[i].DeviceID) {
+ case EC_DID_CMOSBAT:
+ ptbl->vbat[0] = dym_tbl[i].HWPinNumber;
+ ptbl->vbat[1] = 1;
+ break;
+ case EC_DID_CMOSBAT_X2:
+ ptbl->vbat[0] = dym_tbl[i].HWPinNumber;
+ ptbl->vbat[1] = 2;
+ break;
+ case EC_DID_CMOSBAT_X10:
+ ptbl->vbat[0] = dym_tbl[i].HWPinNumber;
+ ptbl->vbat[1] = 10;
+ break;
+ case EC_DID_5VS0:
+ case EC_DID_5VS5:
+ ptbl->v5[0] = dym_tbl[i].HWPinNumber;
+ ptbl->v5[1] = 1;
+ break;
+ case EC_DID_5VS0_X2:
+ case EC_DID_5VS5_X2:
+ ptbl->v5[0] = dym_tbl[i].HWPinNumber;
+ ptbl->v5[1] = 2;
+ break;
+ case EC_DID_5VS0_X10:
+ case EC_DID_5VS5_X10:
+ ptbl->v5[0] = dym_tbl[i].HWPinNumber;
+ ptbl->v5[1] = 10;
+ break;
+ case EC_DID_12VS0:
+ ptbl->v12[0] = dym_tbl[i].HWPinNumber;
+ ptbl->v12[1] = 1;
+ break;
+ case EC_DID_12VS0_X2:
+ ptbl->v12[0] = dym_tbl[i].HWPinNumber;
+ ptbl->v12[1] = 2;
+ break;
+ case EC_DID_12VS0_X10:
+ ptbl->v12[0] = dym_tbl[i].HWPinNumber;
+ ptbl->v12[1] = 10;
+ break;
+ case EC_DID_VCOREA:
+ case EC_DID_VCOREB:
+ ptbl->vcore[0] = dym_tbl[i].HWPinNumber;
+ ptbl->vcore[1] = 1;
+ break;
+ case EC_DID_VCOREA_X2:
+ case EC_DID_VCOREB_X2:
+ ptbl->vcore[0] = dym_tbl[i].HWPinNumber;
+ ptbl->vcore[1] = 2;
+ break;
+ case EC_DID_VCOREA_X10:
+ case EC_DID_VCOREB_X10:
+ ptbl->vcore[0] = dym_tbl[i].HWPinNumber;
+ ptbl->vcore[1] = 10;
+ break;
+ case EC_DID_DC:
+ ptbl->vdc[0] = dym_tbl[i].HWPinNumber;
+ ptbl->vdc[1] = 1;
+ break;
+ case EC_DID_DC_X2:
+ ptbl->vdc[0] = dym_tbl[i].HWPinNumber;
+ ptbl->vdc[1] = 2;
+ break;
+ case EC_DID_DC_X10:
+ ptbl->vdc[0] = dym_tbl[i].HWPinNumber;
+ ptbl->vdc[1] = 10;
+ break;
+ case EC_DID_CURRENT:
+ ptbl->ec_current[0] = dym_tbl[i].HWPinNumber;
+ ptbl->ec_current[1] = 1;
+ break;
+ case EC_DID_SMBOEM0:
+ lmsensor_data.ec_smboem0.HWPinNumber = dym_tbl[i].HWPinNumber;
+ break;
+ default:
+ break;
+ }
+ }
+}
+
+static SENSOR_DEVICE_ATTR_RO(in1_input, get_ec_in1_input, 0);
+static SENSOR_DEVICE_ATTR_RO(in1_label, get_ec_in1_label, 0);
+static SENSOR_DEVICE_ATTR_RO(in2_input, get_ec_in2_input, 0);
+static SENSOR_DEVICE_ATTR_RO(in2_label, get_ec_in2_label, 0);
+static SENSOR_DEVICE_ATTR_RO(in3_input, get_ec_in3_input, 0);
+static SENSOR_DEVICE_ATTR_RO(in3_label, get_ec_in3_label, 0);
+static SENSOR_DEVICE_ATTR_RO(in4_input, get_ec_in4_input, 0);
+static SENSOR_DEVICE_ATTR_RO(in4_label, get_ec_in4_label, 0);
+static SENSOR_DEVICE_ATTR_RO(temp2_label, get_ec_temp2_label, 0);
+static SENSOR_DEVICE_ATTR_RO(temp2_input, get_ec_temp2_input, 0);
+static SENSOR_DEVICE_ATTR_RO(temp2_crit, get_ec_temp2_crit, 0);
+static SENSOR_DEVICE_ATTR_RO(temp2_crit_alarm, get_ec_temp2_crit_alarm, 0);
+
+static struct attribute *ahc1ec0_attrs[] = {
+ &sensor_dev_attr_in1_input.dev_attr.attr,
+ &sensor_dev_attr_in1_label.dev_attr.attr,
+ &sensor_dev_attr_in2_input.dev_attr.attr,
+ &sensor_dev_attr_in2_label.dev_attr.attr,
+ &sensor_dev_attr_in3_input.dev_attr.attr,
+ &sensor_dev_attr_in3_label.dev_attr.attr,
+ &sensor_dev_attr_in4_input.dev_attr.attr,
+ &sensor_dev_attr_in4_label.dev_attr.attr,
+ &sensor_dev_attr_temp2_label.dev_attr.attr,
+ &sensor_dev_attr_temp2_input.dev_attr.attr,
+ &sensor_dev_attr_temp2_crit.dev_attr.attr,
+ &sensor_dev_attr_temp2_crit_alarm.dev_attr.attr,
+ NULL
+};
+ATTRIBUTE_GROUPS(ahc1ec0);
+
+static int adv_ec_hwmon_probe(struct platform_device *pdev)
+{
+ u32 profile;
+ int ret = 0;
+ struct adv_ec_platform_data *adv_ec_data;
+
+ adv_ec_data = dev_get_drvdata(pdev->dev.parent);
+
+ ret = device_property_read_u32(pdev->dev.parent, "advantech,hwmon-profile", &profile);
+ if (ret < 0) {
+ dev_err(&pdev->dev, "get hwmon-profile failed! (%d)", ret);
+ return ret;
+ }
+ adv_ec_init_hwmon_profile(profile, adv_ec_data);
+
+ lmsensor_data.dev = &pdev->dev;
+ lmsensor_data.hwmon_dev = devm_hwmon_device_register_with_groups(&pdev->dev,
+ "ahc1ec0-hwmon", adv_ec_data, ahc1ec0_groups);
+ return PTR_ERR_OR_ZERO(lmsensor_data.hwmon_dev);
+}
+
+static struct platform_driver adv_hwmon_drv = {
+ .driver = {
+ .name = "ahc1ec0-hwmon",
+ },
+ .probe = adv_ec_hwmon_probe,
+};
+module_platform_driver(adv_hwmon_drv);
+
+MODULE_LICENSE("Dual BSD/GPL");
+MODULE_ALIAS("platform:ahc1ec0-hwmon");
+MODULE_DESCRIPTION("Advantech Embedded Controller HWMON Driver.");
+MODULE_AUTHOR("Campion Kang <campion.kang@xxxxxxxxxxxxxxxx>");
+MODULE_AUTHOR("Jianfeng Dia <jianfeng.dai@xxxxxxxxxxxxxxxx>");
+MODULE_VERSION("1.0");
--
2.17.1