diff options
| -rw-r--r-- | Documentation/hwmon/cgbc-hwmon.rst | 63 | ||||
| -rw-r--r-- | Documentation/hwmon/index.rst | 1 | ||||
| -rw-r--r-- | MAINTAINERS | 1 | ||||
| -rw-r--r-- | drivers/hwmon/Kconfig | 10 | ||||
| -rw-r--r-- | drivers/hwmon/Makefile | 1 | ||||
| -rw-r--r-- | drivers/hwmon/cgbc-hwmon.c | 304 |
6 files changed, 380 insertions, 0 deletions
diff --git a/Documentation/hwmon/cgbc-hwmon.rst b/Documentation/hwmon/cgbc-hwmon.rst new file mode 100644 index 000000000000..3a5e6e6e8639 --- /dev/null +++ b/Documentation/hwmon/cgbc-hwmon.rst @@ -0,0 +1,63 @@ +.. SPDX-License-Identifier: GPL-2.0-or-later + +Kernel driver cgbc-hwmon +======================== + +Supported chips: + + * Congatec Board Controller. + + Prefix: 'cgbc-hwmon' + +Author: Thomas Richard <thomas.richard@bootlin.com> + +Description +----------- + +This driver enables monitoring support for the Congatec Board Controller. +This controller is embedded on the x86 SoMs of Congatec. + +Sysfs entries +------------- + +The following sysfs entries list contains all sensors defined in the Board +Controller. The available sensors in sysfs depend on the SoM and the +system. + +============= ====================== +Name Description +============= ====================== +temp1_input CPU temperature +temp2_input Box temperature +temp3_input Ambient temperature +temp4_input Board temperature +temp5_input Carrier temperature +temp6_input Chipset temperature +temp7_input Video temperature +temp8_input Other temperature +temp9_input TOPDIM temperature +temp10_input BOTTOMDIM temperature +in0_input CPU voltage +in1_input DC Runtime voltage +in2_input DC Standby voltage +in3_input CMOS Battery voltage +in4_input Battery voltage +in5_input AC voltage +in6_input Other voltage +in7_input 5V voltage +in8_input 5V Standby voltage +in9_input 3V3 voltage +in10_input 3V3 Standby voltage +in11_input VCore A voltage +in12_input VCore B voltage +in13_input 12V voltage +curr1_input DC current +curr2_input 5V current +curr3_input 12V current +fan1_input CPU fan +fan2_input Box fan +fan3_input Ambient fan +fan4_input Chiptset fan +fan5_input Video fan +fan6_input Other fan +============= ====================== diff --git a/Documentation/hwmon/index.rst b/Documentation/hwmon/index.rst index 874f8fd26325..ef86489bb47c 100644 --- a/Documentation/hwmon/index.rst +++ b/Documentation/hwmon/index.rst @@ -53,6 +53,7 @@ Hardware Monitoring Kernel Drivers bel-pfe bpa-rs600 bt1-pvt + cgbc-hwmon chipcap2 coretemp corsair-cpro diff --git a/MAINTAINERS b/MAINTAINERS index 896a307fa065..c85ce9deb397 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -5874,6 +5874,7 @@ CONGATEC BOARD CONTROLLER MFD DRIVER M: Thomas Richard <thomas.richard@bootlin.com> S: Maintained F: drivers/gpio/gpio-cgbc.c +F: drivers/hwmon/cgbc-hwmon.c F: drivers/i2c/busses/i2c-cgbc.c F: drivers/mfd/cgbc-core.c F: drivers/watchdog/cgbc_wdt.c diff --git a/drivers/hwmon/Kconfig b/drivers/hwmon/Kconfig index 56494ab85b83..76a55ad70bd6 100644 --- a/drivers/hwmon/Kconfig +++ b/drivers/hwmon/Kconfig @@ -463,6 +463,16 @@ config SENSORS_BT1_PVT_ALARMS the data conversion will be periodically performed and the data will be saved in the internal driver cache. +config SENSORS_CGBC + tristate "Congatec Board Controller Sensors" + depends on MFD_CGBC + help + Enable sensors support for the Congatec Board Controller. It has + temperature, voltage, current and fan sensors. + + This driver can also be built as a module. If so, the module will be + called cgbc-hwmon. + config SENSORS_CHIPCAP2 tristate "Amphenol ChipCap 2 relative humidity and temperature sensor" depends on I2C diff --git a/drivers/hwmon/Makefile b/drivers/hwmon/Makefile index b7ef0f0562d3..8af5fdbd5dff 100644 --- a/drivers/hwmon/Makefile +++ b/drivers/hwmon/Makefile @@ -59,6 +59,7 @@ obj-$(CONFIG_SENSORS_ASUS_ROG_RYUJIN) += asus_rog_ryujin.o obj-$(CONFIG_SENSORS_ATXP1) += atxp1.o obj-$(CONFIG_SENSORS_AXI_FAN_CONTROL) += axi-fan-control.o obj-$(CONFIG_SENSORS_BT1_PVT) += bt1-pvt.o +obj-$(CONFIG_SENSORS_CGBC) += cgbc-hwmon.o obj-$(CONFIG_SENSORS_CHIPCAP2) += chipcap2.o obj-$(CONFIG_SENSORS_CORETEMP) += coretemp.o obj-$(CONFIG_SENSORS_CORSAIR_CPRO) += corsair-cpro.o diff --git a/drivers/hwmon/cgbc-hwmon.c b/drivers/hwmon/cgbc-hwmon.c new file mode 100644 index 000000000000..772f44d56ccf --- /dev/null +++ b/drivers/hwmon/cgbc-hwmon.c @@ -0,0 +1,304 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * cgbc-hwmon - Congatec Board Controller hardware monitoring driver + * + * Copyright (C) 2024 Thomas Richard <thomas.richard@bootlin.com> + */ + +#include <linux/bitfield.h> +#include <linux/device.h> +#include <linux/hwmon.h> +#include <linux/mfd/cgbc.h> +#include <linux/module.h> +#include <linux/platform_device.h> + +#define CGBC_HWMON_CMD_SENSOR 0x77 +#define CGBC_HWMON_CMD_SENSOR_DATA_SIZE 0x05 + +#define CGBC_HWMON_TYPE_MASK GENMASK(6, 5) +#define CGBC_HWMON_ID_MASK GENMASK(4, 0) +#define CGBC_HWMON_ACTIVE_BIT BIT(7) + +struct cgbc_hwmon_sensor { + enum hwmon_sensor_types type; + bool active; + unsigned int index; + unsigned int channel; + const char *label; +}; + +struct cgbc_hwmon_data { + struct cgbc_device_data *cgbc; + unsigned int nb_sensors; + struct cgbc_hwmon_sensor *sensors; +}; + +enum cgbc_sensor_types { + CGBC_HWMON_TYPE_TEMP = 1, + CGBC_HWMON_TYPE_IN, + CGBC_HWMON_TYPE_FAN +}; + +static const char * const cgbc_hwmon_labels_temp[] = { + "CPU Temperature", + "Box Temperature", + "Ambient Temperature", + "Board Temperature", + "Carrier Temperature", + "Chipset Temperature", + "Video Temperature", + "Other Temperature", + "TOPDIM Temperature", + "BOTTOMDIM Temperature", +}; + +static const struct { + enum hwmon_sensor_types type; + const char *label; +} cgbc_hwmon_labels_in[] = { + { hwmon_in, "CPU Voltage" }, + { hwmon_in, "DC Runtime Voltage" }, + { hwmon_in, "DC Standby Voltage" }, + { hwmon_in, "CMOS Battery Voltage" }, + { hwmon_in, "Battery Voltage" }, + { hwmon_in, "AC Voltage" }, + { hwmon_in, "Other Voltage" }, + { hwmon_in, "5V Voltage" }, + { hwmon_in, "5V Standby Voltage" }, + { hwmon_in, "3V3 Voltage" }, + { hwmon_in, "3V3 Standby Voltage" }, + { hwmon_in, "VCore A Voltage" }, + { hwmon_in, "VCore B Voltage" }, + { hwmon_in, "12V Voltage" }, + { hwmon_curr, "DC Current" }, + { hwmon_curr, "5V Current" }, + { hwmon_curr, "12V Current" }, +}; + +#define CGBC_HWMON_NB_IN_SENSORS 14 + +static const char * const cgbc_hwmon_labels_fan[] = { + "CPU Fan", + "Box Fan", + "Ambient Fan", + "Chipset Fan", + "Video Fan", + "Other Fan", +}; + +static int cgbc_hwmon_cmd(struct cgbc_device_data *cgbc, u8 index, u8 *data) +{ + u8 cmd[2] = {CGBC_HWMON_CMD_SENSOR, index}; + + return cgbc_command(cgbc, cmd, sizeof(cmd), data, CGBC_HWMON_CMD_SENSOR_DATA_SIZE, NULL); +} + +static int cgbc_hwmon_probe_sensors(struct device *dev, struct cgbc_hwmon_data *hwmon) +{ + struct cgbc_device_data *cgbc = hwmon->cgbc; + struct cgbc_hwmon_sensor *sensor = hwmon->sensors; + u8 data[CGBC_HWMON_CMD_SENSOR_DATA_SIZE], nb_sensors, i; + int ret; + + ret = cgbc_hwmon_cmd(cgbc, 0, &data[0]); + if (ret) + return ret; + + nb_sensors = data[0]; + + hwmon->sensors = devm_kzalloc(dev, sizeof(*hwmon->sensors) * nb_sensors, GFP_KERNEL); + sensor = hwmon->sensors; + + for (i = 0; i < nb_sensors; i++) { + enum cgbc_sensor_types type; + unsigned int channel; + + /* + * No need to request data for the first sensor. + * We got data for the first sensor when we ask the number of sensors to the Board + * Controller. + */ + if (i) { + ret = cgbc_hwmon_cmd(cgbc, i, &data[0]); + if (ret) + return ret; + } + + type = FIELD_GET(CGBC_HWMON_TYPE_MASK, data[1]); + channel = FIELD_GET(CGBC_HWMON_ID_MASK, data[1]) - 1; + + if (type == CGBC_HWMON_TYPE_TEMP && channel < ARRAY_SIZE(cgbc_hwmon_labels_temp)) { + sensor->type = hwmon_temp; + sensor->label = cgbc_hwmon_labels_temp[channel]; + } else if (type == CGBC_HWMON_TYPE_IN && + channel < ARRAY_SIZE(cgbc_hwmon_labels_in)) { + /* + * The Board Controller doesn't differentiate current and voltage sensors. + * Get the sensor type from cgbc_hwmon_labels_in[channel].type instead. + */ + sensor->type = cgbc_hwmon_labels_in[channel].type; + sensor->label = cgbc_hwmon_labels_in[channel].label; + } else if (type == CGBC_HWMON_TYPE_FAN && + channel < ARRAY_SIZE(cgbc_hwmon_labels_fan)) { + sensor->type = hwmon_fan; + sensor->label = cgbc_hwmon_labels_fan[channel]; + } else { + dev_warn(dev, "Board Controller returned an unknown sensor (type=%d, channel=%d), ignore it", + type, channel); + continue; + } + + sensor->active = FIELD_GET(CGBC_HWMON_ACTIVE_BIT, data[1]); + sensor->channel = channel; + sensor->index = i; + sensor++; + hwmon->nb_sensors++; + } + + return 0; +} + +static struct cgbc_hwmon_sensor *cgbc_hwmon_find_sensor(struct cgbc_hwmon_data *hwmon, + enum hwmon_sensor_types type, int channel) +{ + struct cgbc_hwmon_sensor *sensor = NULL; + int i; + + /* + * The Board Controller doesn't differentiate current and voltage sensors. + * The channel value (from the Board Controller point of view) shall be computed for current + * sensors. + */ + if (type == hwmon_curr) + channel += CGBC_HWMON_NB_IN_SENSORS; + + for (i = 0; i < hwmon->nb_sensors; i++) { + if (hwmon->sensors[i].type == type && hwmon->sensors[i].channel == channel) { + sensor = &hwmon->sensors[i]; + break; + } + } + + return sensor; +} + +static int cgbc_hwmon_read(struct device *dev, enum hwmon_sensor_types type, u32 attr, int channel, + long *val) +{ + struct cgbc_hwmon_data *hwmon = dev_get_drvdata(dev); + struct cgbc_hwmon_sensor *sensor = cgbc_hwmon_find_sensor(hwmon, type, channel); + struct cgbc_device_data *cgbc = hwmon->cgbc; + u8 data[CGBC_HWMON_CMD_SENSOR_DATA_SIZE]; + int ret; + + ret = cgbc_hwmon_cmd(cgbc, sensor->index, &data[0]); + if (ret) + return ret; + + *val = (data[3] << 8) | data[2]; + + /* + * For the Board Controller 1lsb = 0.1 degree centigrade. + * Other units are as expected. + */ + if (sensor->type == hwmon_temp) + *val *= 100; + + return 0; +} + +static umode_t cgbc_hwmon_is_visible(const void *_data, enum hwmon_sensor_types type, u32 attr, + int channel) +{ + struct cgbc_hwmon_data *data = (struct cgbc_hwmon_data *)_data; + struct cgbc_hwmon_sensor *sensor; + + sensor = cgbc_hwmon_find_sensor(data, type, channel); + if (!sensor) + return 0; + + return sensor->active ? 0444 : 0; +} + +static int cgbc_hwmon_read_string(struct device *dev, enum hwmon_sensor_types type, u32 attr, + int channel, const char **str) +{ + struct cgbc_hwmon_data *hwmon = dev_get_drvdata(dev); + struct cgbc_hwmon_sensor *sensor = cgbc_hwmon_find_sensor(hwmon, type, channel); + + *str = sensor->label; + + return 0; +} + +static const struct hwmon_channel_info * const cgbc_hwmon_info[] = { + HWMON_CHANNEL_INFO(temp, + HWMON_T_INPUT | HWMON_T_LABEL, HWMON_T_INPUT | HWMON_T_LABEL, + HWMON_T_INPUT | HWMON_T_LABEL, HWMON_T_INPUT | HWMON_T_LABEL, + HWMON_T_INPUT | HWMON_T_LABEL, HWMON_T_INPUT | HWMON_T_LABEL, + HWMON_T_INPUT | HWMON_T_LABEL, HWMON_T_INPUT | HWMON_T_LABEL, + HWMON_T_INPUT | HWMON_T_LABEL, HWMON_T_INPUT | HWMON_T_LABEL), + HWMON_CHANNEL_INFO(in, + HWMON_I_INPUT | HWMON_I_LABEL, HWMON_I_INPUT | HWMON_I_LABEL, + HWMON_I_INPUT | HWMON_I_LABEL, HWMON_I_INPUT | HWMON_I_LABEL, + HWMON_I_INPUT | HWMON_I_LABEL, HWMON_I_INPUT | HWMON_I_LABEL, + HWMON_I_INPUT | HWMON_I_LABEL, HWMON_I_INPUT | HWMON_I_LABEL, + HWMON_I_INPUT | HWMON_I_LABEL, HWMON_I_INPUT | HWMON_I_LABEL, + HWMON_I_INPUT | HWMON_I_LABEL, HWMON_I_INPUT | HWMON_I_LABEL, + HWMON_I_INPUT | HWMON_I_LABEL, HWMON_I_INPUT | HWMON_I_LABEL), + HWMON_CHANNEL_INFO(curr, + HWMON_C_INPUT | HWMON_C_LABEL, HWMON_C_INPUT | HWMON_C_LABEL, + HWMON_C_INPUT | HWMON_C_LABEL), + HWMON_CHANNEL_INFO(fan, + HWMON_F_INPUT | HWMON_F_LABEL, HWMON_F_INPUT | HWMON_F_LABEL, + HWMON_F_INPUT | HWMON_F_LABEL, HWMON_F_INPUT | HWMON_F_LABEL, + HWMON_F_INPUT | HWMON_F_LABEL, HWMON_F_INPUT | HWMON_F_LABEL), + NULL +}; + +static const struct hwmon_ops cgbc_hwmon_ops = { + .is_visible = cgbc_hwmon_is_visible, + .read = cgbc_hwmon_read, + .read_string = cgbc_hwmon_read_string, +}; + +static const struct hwmon_chip_info cgbc_chip_info = { + .ops = &cgbc_hwmon_ops, + .info = cgbc_hwmon_info, +}; + +static int cgbc_hwmon_probe(struct platform_device *pdev) +{ + struct cgbc_device_data *cgbc = dev_get_drvdata(pdev->dev.parent); + struct device *dev = &pdev->dev; + struct cgbc_hwmon_data *data; + struct device *hwmon_dev; + int ret; + + data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL); + if (!data) + return -ENOMEM; + + data->cgbc = cgbc; + + ret = cgbc_hwmon_probe_sensors(dev, data); + if (ret) + return dev_err_probe(dev, ret, "Failed to probe sensors"); + + hwmon_dev = devm_hwmon_device_register_with_info(dev, "cgbc_hwmon", data, &cgbc_chip_info, + NULL); + return PTR_ERR_OR_ZERO(hwmon_dev); +} + +static struct platform_driver cgbc_hwmon_driver = { + .driver = { + .name = "cgbc-hwmon", + }, + .probe = cgbc_hwmon_probe, +}; + +module_platform_driver(cgbc_hwmon_driver); + +MODULE_AUTHOR("Thomas Richard <thomas.richard@bootlin.com>"); +MODULE_DESCRIPTION("Congatec Board Controller Hardware Monitoring Driver"); +MODULE_LICENSE("GPL"); |