diff options
Diffstat (limited to 'drivers/hwmon')
| -rw-r--r-- | drivers/hwmon/Kconfig | 10 | ||||
| -rw-r--r-- | drivers/hwmon/Makefile | 1 | ||||
| -rw-r--r-- | drivers/hwmon/wm8350-hwmon.c | 151 |
3 files changed, 162 insertions, 0 deletions
diff --git a/drivers/hwmon/Kconfig b/drivers/hwmon/Kconfig index 2e25b7a827d..120085ce651 100644 --- a/drivers/hwmon/Kconfig +++ b/drivers/hwmon/Kconfig @@ -937,6 +937,16 @@ config SENSORS_W83627EHF This driver can also be built as a module. If so, the module will be called w83627ehf. +config SENSORS_WM8350 + tristate "Wolfson Microelectronics WM835x" + depends on MFD_WM8350 + help + If you say yes here you get support for the hardware + monitoring features of the WM835x series of PMICs. + + This driver can also be built as a module. If so, the module + will be called wm8350-hwmon. + config SENSORS_ULTRA45 tristate "Sun Ultra45 PIC16F747" depends on SPARC64 diff --git a/drivers/hwmon/Makefile b/drivers/hwmon/Makefile index 7f239a247c3..ed5f1781b8c 100644 --- a/drivers/hwmon/Makefile +++ b/drivers/hwmon/Makefile @@ -90,6 +90,7 @@ obj-$(CONFIG_SENSORS_VT8231) += vt8231.o obj-$(CONFIG_SENSORS_W83627EHF) += w83627ehf.o obj-$(CONFIG_SENSORS_W83L785TS) += w83l785ts.o obj-$(CONFIG_SENSORS_W83L786NG) += w83l786ng.o +obj-$(CONFIG_SENSORS_WM8350) += wm8350-hwmon.o ifeq ($(CONFIG_HWMON_DEBUG_CHIP),y) EXTRA_CFLAGS += -DDEBUG diff --git a/drivers/hwmon/wm8350-hwmon.c b/drivers/hwmon/wm8350-hwmon.c new file mode 100644 index 00000000000..13290595ca8 --- /dev/null +++ b/drivers/hwmon/wm8350-hwmon.c @@ -0,0 +1,151 @@ +/* + * drivers/hwmon/wm8350-hwmon.c - Wolfson Microelectronics WM8350 PMIC + * hardware monitoring features. + * + * Copyright (C) 2009 Wolfson Microelectronics plc + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License v2 as published by the + * Free Software Foundation. + * + * 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., + * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA + */ + +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/err.h> +#include <linux/platform_device.h> +#include <linux/hwmon.h> +#include <linux/hwmon-sysfs.h> + +#include <linux/mfd/wm8350/core.h> +#include <linux/mfd/wm8350/comparator.h> + +static ssize_t show_name(struct device *dev, + struct device_attribute *attr, char *buf) +{ + return sprintf(buf, "wm8350\n"); +} + +static const char *input_names[] = { + [WM8350_AUXADC_USB] = "USB", + [WM8350_AUXADC_LINE] = "Line", + [WM8350_AUXADC_BATT] = "Battery", +}; + + +static ssize_t show_voltage(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct wm8350 *wm8350 = dev_get_drvdata(dev); + int channel = to_sensor_dev_attr(attr)->index; + int val; + + val = wm8350_read_auxadc(wm8350, channel, 0, 0) * WM8350_AUX_COEFF; + val = DIV_ROUND_CLOSEST(val, 1000); + + return sprintf(buf, "%d\n", val); +} + +static ssize_t show_label(struct device *dev, + struct device_attribute *attr, char *buf) +{ + int channel = to_sensor_dev_attr(attr)->index; + + return sprintf(buf, "%s\n", input_names[channel]); +} + +#define WM8350_NAMED_VOLTAGE(id, name) \ + static SENSOR_DEVICE_ATTR(in##id##_input, S_IRUGO, show_voltage,\ + NULL, name); \ + static SENSOR_DEVICE_ATTR(in##id##_label, S_IRUGO, show_label, \ + NULL, name) + +static DEVICE_ATTR(name, S_IRUGO, show_name, NULL); + +WM8350_NAMED_VOLTAGE(0, WM8350_AUXADC_USB); +WM8350_NAMED_VOLTAGE(1, WM8350_AUXADC_BATT); +WM8350_NAMED_VOLTAGE(2, WM8350_AUXADC_LINE); + +static struct attribute *wm8350_attributes[] = { + &dev_attr_name.attr, + + &sensor_dev_attr_in0_input.dev_attr.attr, + &sensor_dev_attr_in0_label.dev_attr.attr, + &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, + + NULL, +}; + +static const struct attribute_group wm8350_attr_group = { + .attrs = wm8350_attributes, +}; + +static int __devinit wm8350_hwmon_probe(struct platform_device *pdev) +{ + struct wm8350 *wm8350 = platform_get_drvdata(pdev); + int ret; + + ret = sysfs_create_group(&pdev->dev.kobj, &wm8350_attr_group); + if (ret) + goto err; + + wm8350->hwmon.classdev = hwmon_device_register(&pdev->dev); + if (IS_ERR(wm8350->hwmon.classdev)) { + ret = PTR_ERR(wm8350->hwmon.classdev); + goto err_group; + } + + return 0; + +err_group: + sysfs_remove_group(&pdev->dev.kobj, &wm8350_attr_group); +err: + return ret; +} + +static int __devexit wm8350_hwmon_remove(struct platform_device *pdev) +{ + struct wm8350 *wm8350 = platform_get_drvdata(pdev); + + hwmon_device_unregister(wm8350->hwmon.classdev); + sysfs_remove_group(&pdev->dev.kobj, &wm8350_attr_group); + + return 0; +} + +static struct platform_driver wm8350_hwmon_driver = { + .probe = wm8350_hwmon_probe, + .remove = __devexit_p(wm8350_hwmon_remove), + .driver = { + .name = "wm8350-hwmon", + .owner = THIS_MODULE, + }, +}; + +static int __init wm8350_hwmon_init(void) +{ + return platform_driver_register(&wm8350_hwmon_driver); +} +module_init(wm8350_hwmon_init); + +static void __exit wm8350_hwmon_exit(void) +{ + platform_driver_unregister(&wm8350_hwmon_driver); +} +module_exit(wm8350_hwmon_exit); + +MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>"); +MODULE_DESCRIPTION("WM8350 Hardware Monitoring"); +MODULE_LICENSE("GPL"); +MODULE_ALIAS("platform:wm8350-hwmon"); |