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author | Sudeep Holla <sudeep.holla@arm.com> | 2016-01-29 17:35:52 +0000 |
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committer | Guenter Roeck <linux@roeck-us.net> | 2016-03-05 06:25:33 -0800 |
commit | c32f5eff2db51f0126b0a4e42bdefea2d9d2872e (patch) | |
tree | 661fb32258a1372fb34bc4f8b5483d2e9f100e22 /drivers/hwmon/vexpress-hwmon.c | |
parent | fc77dbd34c5c99bce46d40a2491937c3bcbd10af (diff) | |
download | linux-c32f5eff2db51f0126b0a4e42bdefea2d9d2872e.tar.gz linux-c32f5eff2db51f0126b0a4e42bdefea2d9d2872e.tar.bz2 linux-c32f5eff2db51f0126b0a4e42bdefea2d9d2872e.zip |
hwmon: (vexpress) rename vexpress hwmon implementation
The vexpress hwmon implementation is currently just called vexpress.
This is a problem because it clashes with another module with the same
name in regulators.
This patch renames the vexpress hwmon implementation to vexpress-hwmon
so that there will be no clash in the module namespace.
Cc: Liviu Dudau <liviu.dudau@arm.com>
Cc: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Cc: Jean Delvare <jdelvare@suse.com>
Cc: Guenter Roeck <linux@roeck-us.net>
Cc: lm-sensors@lm-sensors.org
Reported-by: Rusty Russell <rusty@rustcorp.com.au>
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Diffstat (limited to 'drivers/hwmon/vexpress-hwmon.c')
-rw-r--r-- | drivers/hwmon/vexpress-hwmon.c | 259 |
1 files changed, 259 insertions, 0 deletions
diff --git a/drivers/hwmon/vexpress-hwmon.c b/drivers/hwmon/vexpress-hwmon.c new file mode 100644 index 000000000000..8ba419d343f8 --- /dev/null +++ b/drivers/hwmon/vexpress-hwmon.c @@ -0,0 +1,259 @@ +/* + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 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. + * + * Copyright (C) 2012 ARM Limited + */ + +#define DRVNAME "vexpress-hwmon" +#define pr_fmt(fmt) DRVNAME ": " fmt + +#include <linux/device.h> +#include <linux/err.h> +#include <linux/hwmon.h> +#include <linux/hwmon-sysfs.h> +#include <linux/module.h> +#include <linux/of.h> +#include <linux/of_device.h> +#include <linux/platform_device.h> +#include <linux/vexpress.h> + +struct vexpress_hwmon_data { + struct device *hwmon_dev; + struct regmap *reg; +}; + +static ssize_t vexpress_hwmon_label_show(struct device *dev, + struct device_attribute *dev_attr, char *buffer) +{ + const char *label = of_get_property(dev->of_node, "label", NULL); + + return snprintf(buffer, PAGE_SIZE, "%s\n", label); +} + +static ssize_t vexpress_hwmon_u32_show(struct device *dev, + struct device_attribute *dev_attr, char *buffer) +{ + struct vexpress_hwmon_data *data = dev_get_drvdata(dev); + int err; + u32 value; + + err = regmap_read(data->reg, 0, &value); + if (err) + return err; + + return snprintf(buffer, PAGE_SIZE, "%u\n", value / + to_sensor_dev_attr(dev_attr)->index); +} + +static ssize_t vexpress_hwmon_u64_show(struct device *dev, + struct device_attribute *dev_attr, char *buffer) +{ + struct vexpress_hwmon_data *data = dev_get_drvdata(dev); + int err; + u32 value_hi, value_lo; + + err = regmap_read(data->reg, 0, &value_lo); + if (err) + return err; + + err = regmap_read(data->reg, 1, &value_hi); + if (err) + return err; + + return snprintf(buffer, PAGE_SIZE, "%llu\n", + div_u64(((u64)value_hi << 32) | value_lo, + to_sensor_dev_attr(dev_attr)->index)); +} + +static umode_t vexpress_hwmon_attr_is_visible(struct kobject *kobj, + struct attribute *attr, int index) +{ + struct device *dev = kobj_to_dev(kobj); + struct device_attribute *dev_attr = container_of(attr, + struct device_attribute, attr); + + if (dev_attr->show == vexpress_hwmon_label_show && + !of_get_property(dev->of_node, "label", NULL)) + return 0; + + return attr->mode; +} + +struct vexpress_hwmon_type { + const char *name; + const struct attribute_group **attr_groups; +}; + +#if !defined(CONFIG_REGULATOR_VEXPRESS) +static DEVICE_ATTR(in1_label, S_IRUGO, vexpress_hwmon_label_show, NULL); +static SENSOR_DEVICE_ATTR(in1_input, S_IRUGO, vexpress_hwmon_u32_show, + NULL, 1000); +static struct attribute *vexpress_hwmon_attrs_volt[] = { + &dev_attr_in1_label.attr, + &sensor_dev_attr_in1_input.dev_attr.attr, + NULL +}; +static struct attribute_group vexpress_hwmon_group_volt = { + .is_visible = vexpress_hwmon_attr_is_visible, + .attrs = vexpress_hwmon_attrs_volt, +}; +static struct vexpress_hwmon_type vexpress_hwmon_volt = { + .name = "vexpress_volt", + .attr_groups = (const struct attribute_group *[]) { + &vexpress_hwmon_group_volt, + NULL, + }, +}; +#endif + +static DEVICE_ATTR(curr1_label, S_IRUGO, vexpress_hwmon_label_show, NULL); +static SENSOR_DEVICE_ATTR(curr1_input, S_IRUGO, vexpress_hwmon_u32_show, + NULL, 1000); +static struct attribute *vexpress_hwmon_attrs_amp[] = { + &dev_attr_curr1_label.attr, + &sensor_dev_attr_curr1_input.dev_attr.attr, + NULL +}; +static struct attribute_group vexpress_hwmon_group_amp = { + .is_visible = vexpress_hwmon_attr_is_visible, + .attrs = vexpress_hwmon_attrs_amp, +}; +static struct vexpress_hwmon_type vexpress_hwmon_amp = { + .name = "vexpress_amp", + .attr_groups = (const struct attribute_group *[]) { + &vexpress_hwmon_group_amp, + NULL + }, +}; + +static DEVICE_ATTR(temp1_label, S_IRUGO, vexpress_hwmon_label_show, NULL); +static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, vexpress_hwmon_u32_show, + NULL, 1000); +static struct attribute *vexpress_hwmon_attrs_temp[] = { + &dev_attr_temp1_label.attr, + &sensor_dev_attr_temp1_input.dev_attr.attr, + NULL +}; +static struct attribute_group vexpress_hwmon_group_temp = { + .is_visible = vexpress_hwmon_attr_is_visible, + .attrs = vexpress_hwmon_attrs_temp, +}; +static struct vexpress_hwmon_type vexpress_hwmon_temp = { + .name = "vexpress_temp", + .attr_groups = (const struct attribute_group *[]) { + &vexpress_hwmon_group_temp, + NULL + }, +}; + +static DEVICE_ATTR(power1_label, S_IRUGO, vexpress_hwmon_label_show, NULL); +static SENSOR_DEVICE_ATTR(power1_input, S_IRUGO, vexpress_hwmon_u32_show, + NULL, 1); +static struct attribute *vexpress_hwmon_attrs_power[] = { + &dev_attr_power1_label.attr, + &sensor_dev_attr_power1_input.dev_attr.attr, + NULL +}; +static struct attribute_group vexpress_hwmon_group_power = { + .is_visible = vexpress_hwmon_attr_is_visible, + .attrs = vexpress_hwmon_attrs_power, +}; +static struct vexpress_hwmon_type vexpress_hwmon_power = { + .name = "vexpress_power", + .attr_groups = (const struct attribute_group *[]) { + &vexpress_hwmon_group_power, + NULL + }, +}; + +static DEVICE_ATTR(energy1_label, S_IRUGO, vexpress_hwmon_label_show, NULL); +static SENSOR_DEVICE_ATTR(energy1_input, S_IRUGO, vexpress_hwmon_u64_show, + NULL, 1); +static struct attribute *vexpress_hwmon_attrs_energy[] = { + &dev_attr_energy1_label.attr, + &sensor_dev_attr_energy1_input.dev_attr.attr, + NULL +}; +static struct attribute_group vexpress_hwmon_group_energy = { + .is_visible = vexpress_hwmon_attr_is_visible, + .attrs = vexpress_hwmon_attrs_energy, +}; +static struct vexpress_hwmon_type vexpress_hwmon_energy = { + .name = "vexpress_energy", + .attr_groups = (const struct attribute_group *[]) { + &vexpress_hwmon_group_energy, + NULL + }, +}; + +static const struct of_device_id vexpress_hwmon_of_match[] = { +#if !defined(CONFIG_REGULATOR_VEXPRESS) + { + .compatible = "arm,vexpress-volt", + .data = &vexpress_hwmon_volt, + }, +#endif + { + .compatible = "arm,vexpress-amp", + .data = &vexpress_hwmon_amp, + }, { + .compatible = "arm,vexpress-temp", + .data = &vexpress_hwmon_temp, + }, { + .compatible = "arm,vexpress-power", + .data = &vexpress_hwmon_power, + }, { + .compatible = "arm,vexpress-energy", + .data = &vexpress_hwmon_energy, + }, + {} +}; +MODULE_DEVICE_TABLE(of, vexpress_hwmon_of_match); + +static int vexpress_hwmon_probe(struct platform_device *pdev) +{ + const struct of_device_id *match; + struct vexpress_hwmon_data *data; + const struct vexpress_hwmon_type *type; + + data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL); + if (!data) + return -ENOMEM; + platform_set_drvdata(pdev, data); + + match = of_match_device(vexpress_hwmon_of_match, &pdev->dev); + if (!match) + return -ENODEV; + type = match->data; + + data->reg = devm_regmap_init_vexpress_config(&pdev->dev); + if (IS_ERR(data->reg)) + return PTR_ERR(data->reg); + + data->hwmon_dev = devm_hwmon_device_register_with_groups(&pdev->dev, + type->name, data, type->attr_groups); + + return PTR_ERR_OR_ZERO(data->hwmon_dev); +} + +static struct platform_driver vexpress_hwmon_driver = { + .probe = vexpress_hwmon_probe, + .driver = { + .name = DRVNAME, + .of_match_table = vexpress_hwmon_of_match, + }, +}; + +module_platform_driver(vexpress_hwmon_driver); + +MODULE_AUTHOR("Pawel Moll <pawel.moll@arm.com>"); +MODULE_DESCRIPTION("Versatile Express hwmon sensors driver"); +MODULE_LICENSE("GPL"); +MODULE_ALIAS("platform:vexpress-hwmon"); |