diff options
author | Yunhong Jiang <yunhong.jiang@intel.com> | 2015-08-04 12:17:53 -0700 |
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committer | Yunhong Jiang <yunhong.jiang@intel.com> | 2015-08-04 15:44:42 -0700 |
commit | 9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00 (patch) | |
tree | 1c9cafbcd35f783a87880a10f85d1a060db1a563 /kernel/drivers/hwmon/wm8350-hwmon.c | |
parent | 98260f3884f4a202f9ca5eabed40b1354c489b29 (diff) |
Add the rt linux 4.1.3-rt3 as base
Import the rt linux 4.1.3-rt3 as OPNFV kvm base.
It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and
the base is:
commit 0917f823c59692d751951bf5ea699a2d1e2f26a2
Author: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Date: Sat Jul 25 12:13:34 2015 +0200
Prepare v4.1.3-rt3
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
We lose all the git history this way and it's not good. We
should apply another opnfv project repo in future.
Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423
Signed-off-by: Yunhong Jiang <yunhong.jiang@intel.com>
Diffstat (limited to 'kernel/drivers/hwmon/wm8350-hwmon.c')
-rw-r--r-- | kernel/drivers/hwmon/wm8350-hwmon.c | 104 |
1 files changed, 104 insertions, 0 deletions
diff --git a/kernel/drivers/hwmon/wm8350-hwmon.c b/kernel/drivers/hwmon/wm8350-hwmon.c new file mode 100644 index 000000000..31af438ff --- /dev/null +++ b/kernel/drivers/hwmon/wm8350-hwmon.c @@ -0,0 +1,104 @@ +/* + * 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 const char * const 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) + +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_attrs[] = { + &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, +}; + +ATTRIBUTE_GROUPS(wm8350); + +static int wm8350_hwmon_probe(struct platform_device *pdev) +{ + struct wm8350 *wm8350 = platform_get_drvdata(pdev); + struct device *hwmon_dev; + + hwmon_dev = devm_hwmon_device_register_with_groups(&pdev->dev, "wm8350", + wm8350, + wm8350_groups); + return PTR_ERR_OR_ZERO(hwmon_dev); +} + +static struct platform_driver wm8350_hwmon_driver = { + .probe = wm8350_hwmon_probe, + .driver = { + .name = "wm8350-hwmon", + }, +}; + +module_platform_driver(wm8350_hwmon_driver); + +MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>"); +MODULE_DESCRIPTION("WM8350 Hardware Monitoring"); +MODULE_LICENSE("GPL"); +MODULE_ALIAS("platform:wm8350-hwmon"); |