From: Georgi Vlaev <gvlaev@xxxxxxxxxxx> The drivers allows reading CPU, PCH and DIMM modules teperatures from the I2CS FPGA via the SMLink1 to the PCH. Signed-off-by: Georgi Vlaev <gvlaev@xxxxxxxxxxx> Signed-off-by: Guenter Roeck <groeck@xxxxxxxxxxx> [Ported from Juniper kernel] Signed-off-by: Pantelis Antoniou <pantelis.antoniou@xxxxxxxxxxxx> --- drivers/hwmon/Kconfig | 17 ++++++ drivers/hwmon/Makefile | 1 + drivers/hwmon/jnx_ptx1kbf_hwmon.c | 123 ++++++++++++++++++++++++++++++++++++++ 3 files changed, 141 insertions(+) create mode 100644 drivers/hwmon/jnx_ptx1kbf_hwmon.c diff --git a/drivers/hwmon/Kconfig b/drivers/hwmon/Kconfig index b9348d2..5b66c7b 100644 --- a/drivers/hwmon/Kconfig +++ b/drivers/hwmon/Kconfig @@ -674,6 +674,23 @@ config SENSORS_JNX_FAN This driver can also be built as a module. If so, the module will be called jnx-fan. +config SENSORS_JNX_PTX1KBF + tristate "Juniper Networks PTX1000 I2CS BootFPGA thermal sensors" + depends on MFD_JUNIPER_PTX1KBF + help + If you say yes here you get support for the hardware + monitoring features of the Juniper Networks PTX1000 I2CS BootFPGA + on the LPC bus. The CPU's digital thermal sensor can be read over + the PECI interface. PECI is connected to the PCH and the PCH's + Management Engine (ME) can be configured to poll CPU and DIMM + temperatures over the PECI interface. Then, it is possible for an + external I2C master (in the I2CS FPGA) to read CPU, DIMM and PCH + temperatures from the PCH over SMLink1 (which is connected to the board + I2C tree). + + This driver can also be built as a module. If so, the module + will be called jnx_ptx1kbf_hwmon. + config SENSORS_POWR1220 tristate "Lattice POWR1220 Power Monitoring" depends on I2C diff --git a/drivers/hwmon/Makefile b/drivers/hwmon/Makefile index eea631e..a3dedef 100644 --- a/drivers/hwmon/Makefile +++ b/drivers/hwmon/Makefile @@ -82,6 +82,7 @@ obj-$(CONFIG_SENSORS_INA3221) += ina3221.o obj-$(CONFIG_SENSORS_IT87) += it87.o obj-$(CONFIG_SENSORS_JC42) += jc42.o obj-$(CONFIG_SENSORS_JNX_FAN) += jnx-fan.o +obj-$(CONFIG_SENSORS_JNX_PTX1KBF) += jnx_ptx1kbf_hwmon.o obj-$(CONFIG_SENSORS_JZ4740) += jz4740-hwmon.o obj-$(CONFIG_SENSORS_K8TEMP) += k8temp.o obj-$(CONFIG_SENSORS_K10TEMP) += k10temp.o diff --git a/drivers/hwmon/jnx_ptx1kbf_hwmon.c b/drivers/hwmon/jnx_ptx1kbf_hwmon.c new file mode 100644 index 0000000..a9d6562 --- /dev/null +++ b/drivers/hwmon/jnx_ptx1kbf_hwmon.c @@ -0,0 +1,123 @@ +/* + * Juniper Networks PTX1K RCB I2CS Boot FPGA hwmon driver + * + * Copyright (C) 2014 Juniper Networks. All rights reserved. + * Author: Georgi Vlaev <gvlaev@xxxxxxxxxxx> + * + * 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. + */ + +#include <linux/err.h> +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/platform_device.h> +#include <linux/io.h> +#include <linux/hwmon.h> +#include <linux/hwmon-sysfs.h> +#include <linux/mfd/ptx1k-bootfpga.h> + +#define DRVNAME "jnx-ptx1kbf-hwmon" + +struct bf_hwmon { + void __iomem *base; +}; + +static const char *const bf_temp_label[] = { + "CPU", "PCH", "DIMM1", "DIMM2" +}; + +static ssize_t bf_show_temp(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct bf_hwmon *hwmon = dev_get_drvdata(dev); + int channel = to_sensor_dev_attr(attr)->index; + + return sprintf(buf, "%d\n", be16_to_cpu(ioread16(hwmon->base + + BOOT_FPGA_CPU_TEMP_MSB + (channel * 2)))); +} + +static ssize_t bf_show_label(struct device *dev, + struct device_attribute *attr, char *buf) +{ + int channel = to_sensor_dev_attr(attr)->index; + + return sprintf(buf, "%s\n", bf_temp_label[channel]); +} + +/* CPU Temp */ +static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, bf_show_temp, NULL, 0); +static SENSOR_DEVICE_ATTR(temp1_label, S_IRUGO, bf_show_label, NULL, 0); +/* PCH Temp */ +static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO, bf_show_temp, NULL, 1); +static SENSOR_DEVICE_ATTR(temp2_label, S_IRUGO, bf_show_label, NULL, 1); +/* DIMM1 Temp */ +static SENSOR_DEVICE_ATTR(temp3_input, S_IRUGO, bf_show_temp, NULL, 2); +static SENSOR_DEVICE_ATTR(temp3_label, S_IRUGO, bf_show_label, NULL, 2); +/* DIMM2 Temp */ +static SENSOR_DEVICE_ATTR(temp4_input, S_IRUGO, bf_show_temp, NULL, 3); +static SENSOR_DEVICE_ATTR(temp4_label, S_IRUGO, bf_show_label, NULL, 3); + +static struct attribute *bf_attrs[] = { + &sensor_dev_attr_temp1_input.dev_attr.attr, + &sensor_dev_attr_temp1_label.dev_attr.attr, + &sensor_dev_attr_temp2_input.dev_attr.attr, + &sensor_dev_attr_temp2_label.dev_attr.attr, + &sensor_dev_attr_temp3_input.dev_attr.attr, + &sensor_dev_attr_temp3_label.dev_attr.attr, + &sensor_dev_attr_temp4_input.dev_attr.attr, + &sensor_dev_attr_temp4_label.dev_attr.attr, + NULL +}; + +ATTRIBUTE_GROUPS(bf); + +static int bf_hwmon_probe(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + struct device *hwmon_dev; + struct bf_hwmon *hwmon; + struct resource *mem; + + hwmon = devm_kzalloc(dev, sizeof(*hwmon), GFP_KERNEL); + if (!hwmon) + return -ENOMEM; + + mem = platform_get_resource(pdev, IORESOURCE_MEM, 0); + if (!mem) { + dev_err(&pdev->dev, "Failed to get platform mmio resource\n"); + return -ENOENT; + } + + hwmon->base = devm_ioremap_nocache(dev, mem->start, resource_size(mem)); + if (IS_ERR(hwmon->base)) { + dev_err(dev, "Failed to ioremap mmio memory\n"); + return PTR_ERR(hwmon->base); + } + + hwmon_dev = devm_hwmon_device_register_with_groups(dev, "jnx_ptx1kbf", + hwmon, bf_groups); + return PTR_ERR_OR_ZERO(hwmon_dev); +} + +static struct platform_driver bf_hwmon_driver = { + .probe = bf_hwmon_probe, + .driver = { + .name = DRVNAME, + .owner = THIS_MODULE, + }, +}; + +module_platform_driver(bf_hwmon_driver); + +MODULE_DESCRIPTION("Juniper Networks PTX1K RCB I2CS Boot FPGA hwmon driver"); +MODULE_AUTHOR("Georgi Vlaev <gvlaev@xxxxxxxxxxx>"); +MODULE_LICENSE("GPL"); +MODULE_ALIAS("platform:" DRVNAME); -- 1.9.1 -- To unsubscribe from this list: send the line "unsubscribe linux-watchdog" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html