730 lines
20 KiB
C
730 lines
20 KiB
C
/*
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* Copyright (c) 2016-2018 Mellanox Technologies. All rights reserved.
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* Copyright (c) 2016-2018 Vadim Pasternak <vadimp@mellanox.com>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the names of the copyright holders nor the names of its
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* contributors may be used to endorse or promote products derived from
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* this software without specific prior written permission.
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*
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* Alternatively, this software may be distributed under the terms of the
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* GNU General Public License ("GPL") version 2 as published by the Free
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* Software Foundation.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <linux/bitops.h>
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#include <linux/device.h>
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#include <linux/hwmon.h>
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#include <linux/hwmon-sysfs.h>
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#include <linux/i2c.h>
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#include <linux/interrupt.h>
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#include <linux/module.h>
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#include <linux/of_device.h>
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#include <linux/platform_data/mlxreg.h>
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#include <linux/platform_device.h>
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#include <linux/spinlock.h>
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#include <linux/regmap.h>
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#include <linux/workqueue.h>
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/* Offset of event and mask registers from status register. */
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#define MLXREG_HOTPLUG_EVENT_OFF 1
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#define MLXREG_HOTPLUG_MASK_OFF 2
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#define MLXREG_HOTPLUG_AGGR_MASK_OFF 1
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/* ASIC good health mask. */
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#define MLXREG_HOTPLUG_GOOD_HEALTH_MASK 0x02
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#define MLXREG_HOTPLUG_ATTRS_MAX 24
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#define MLXREG_HOTPLUG_NOT_ASSERT 3
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/**
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* struct mlxreg_hotplug_priv_data - platform private data:
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* @irq: platform device interrupt number;
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* @dev: basic device;
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* @pdev: platform device;
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* @plat: platform data;
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* @regmap: register map handle;
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* @dwork_irq: delayed work template;
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* @lock: spin lock;
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* @hwmon: hwmon device;
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* @mlxreg_hotplug_attr: sysfs attributes array;
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* @mlxreg_hotplug_dev_attr: sysfs sensor device attribute array;
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* @group: sysfs attribute group;
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* @groups: list of sysfs attribute group for hwmon registration;
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* @cell: location of top aggregation interrupt register;
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* @mask: top aggregation interrupt common mask;
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* @aggr_cache: last value of aggregation register status;
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* @after_probe: flag indication probing completion;
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* @not_asserted: number of entries in workqueue with no signal assertion;
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*/
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struct mlxreg_hotplug_priv_data {
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int irq;
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struct device *dev;
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struct platform_device *pdev;
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struct mlxreg_hotplug_platform_data *plat;
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struct regmap *regmap;
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struct delayed_work dwork_irq;
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spinlock_t lock; /* sync with interrupt */
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struct device *hwmon;
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struct attribute *mlxreg_hotplug_attr[MLXREG_HOTPLUG_ATTRS_MAX + 1];
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struct sensor_device_attribute_2
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mlxreg_hotplug_dev_attr[MLXREG_HOTPLUG_ATTRS_MAX];
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struct attribute_group group;
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const struct attribute_group *groups[2];
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u32 cell;
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u32 mask;
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u32 aggr_cache;
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bool after_probe;
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u8 not_asserted;
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};
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static int mlxreg_hotplug_device_create(struct mlxreg_hotplug_priv_data *priv,
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struct mlxreg_core_data *data)
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{
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struct mlxreg_core_hotplug_platform_data *pdata;
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struct i2c_client *client;
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/* Notify user by sending hwmon uevent. */
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kobject_uevent(&priv->hwmon->kobj, KOBJ_CHANGE);
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/*
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* Return if adapter number is negative. It could be in case hotplug
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* event is not associated with hotplug device.
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*/
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if (data->hpdev.nr < 0)
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return 0;
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pdata = dev_get_platdata(&priv->pdev->dev);
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data->hpdev.adapter = i2c_get_adapter(data->hpdev.nr +
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pdata->shift_nr);
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if (!data->hpdev.adapter) {
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dev_err(priv->dev, "Failed to get adapter for bus %d\n",
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data->hpdev.nr + pdata->shift_nr);
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return -EFAULT;
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}
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client = i2c_new_client_device(data->hpdev.adapter,
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data->hpdev.brdinfo);
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if (IS_ERR(client)) {
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dev_err(priv->dev, "Failed to create client %s at bus %d at addr 0x%02x\n",
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data->hpdev.brdinfo->type, data->hpdev.nr +
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pdata->shift_nr, data->hpdev.brdinfo->addr);
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i2c_put_adapter(data->hpdev.adapter);
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data->hpdev.adapter = NULL;
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return PTR_ERR(client);
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}
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data->hpdev.client = client;
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return 0;
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}
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static void
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mlxreg_hotplug_device_destroy(struct mlxreg_hotplug_priv_data *priv,
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struct mlxreg_core_data *data)
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{
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/* Notify user by sending hwmon uevent. */
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kobject_uevent(&priv->hwmon->kobj, KOBJ_CHANGE);
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if (data->hpdev.client) {
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i2c_unregister_device(data->hpdev.client);
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data->hpdev.client = NULL;
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}
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if (data->hpdev.adapter) {
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i2c_put_adapter(data->hpdev.adapter);
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data->hpdev.adapter = NULL;
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}
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}
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static ssize_t mlxreg_hotplug_attr_show(struct device *dev,
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struct device_attribute *attr,
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char *buf)
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{
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struct mlxreg_hotplug_priv_data *priv = dev_get_drvdata(dev);
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struct mlxreg_core_hotplug_platform_data *pdata;
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int index = to_sensor_dev_attr_2(attr)->index;
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int nr = to_sensor_dev_attr_2(attr)->nr;
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struct mlxreg_core_item *item;
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struct mlxreg_core_data *data;
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u32 regval;
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int ret;
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pdata = dev_get_platdata(&priv->pdev->dev);
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item = pdata->items + nr;
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data = item->data + index;
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ret = regmap_read(priv->regmap, data->reg, ®val);
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if (ret)
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return ret;
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if (item->health) {
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regval &= data->mask;
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} else {
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/* Bit = 0 : functional if item->inversed is true. */
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if (item->inversed)
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regval = !(regval & data->mask);
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else
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regval = !!(regval & data->mask);
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}
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return sprintf(buf, "%u\n", regval);
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}
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#define PRIV_ATTR(i) priv->mlxreg_hotplug_attr[i]
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#define PRIV_DEV_ATTR(i) priv->mlxreg_hotplug_dev_attr[i]
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static int mlxreg_hotplug_attr_init(struct mlxreg_hotplug_priv_data *priv)
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{
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struct mlxreg_core_hotplug_platform_data *pdata;
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struct mlxreg_core_item *item;
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struct mlxreg_core_data *data;
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int num_attrs = 0, id = 0, i, j;
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pdata = dev_get_platdata(&priv->pdev->dev);
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item = pdata->items;
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/* Go over all kinds of items - psu, pwr, fan. */
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for (i = 0; i < pdata->counter; i++, item++) {
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num_attrs += item->count;
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data = item->data;
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/* Go over all units within the item. */
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for (j = 0; j < item->count; j++, data++, id++) {
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PRIV_ATTR(id) = &PRIV_DEV_ATTR(id).dev_attr.attr;
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PRIV_ATTR(id)->name = devm_kasprintf(&priv->pdev->dev,
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GFP_KERNEL,
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data->label);
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if (!PRIV_ATTR(id)->name) {
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dev_err(priv->dev, "Memory allocation failed for attr %d.\n",
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id);
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return -ENOMEM;
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}
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PRIV_DEV_ATTR(id).dev_attr.attr.name =
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PRIV_ATTR(id)->name;
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PRIV_DEV_ATTR(id).dev_attr.attr.mode = 0444;
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PRIV_DEV_ATTR(id).dev_attr.show =
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mlxreg_hotplug_attr_show;
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PRIV_DEV_ATTR(id).nr = i;
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PRIV_DEV_ATTR(id).index = j;
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sysfs_attr_init(&PRIV_DEV_ATTR(id).dev_attr.attr);
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}
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}
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priv->group.attrs = devm_kcalloc(&priv->pdev->dev,
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num_attrs,
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sizeof(struct attribute *),
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GFP_KERNEL);
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if (!priv->group.attrs)
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return -ENOMEM;
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priv->group.attrs = priv->mlxreg_hotplug_attr;
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priv->groups[0] = &priv->group;
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priv->groups[1] = NULL;
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return 0;
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}
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static void
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mlxreg_hotplug_work_helper(struct mlxreg_hotplug_priv_data *priv,
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struct mlxreg_core_item *item)
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{
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struct mlxreg_core_data *data;
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unsigned long asserted;
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u32 regval, bit;
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int ret;
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/*
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* Validate if item related to received signal type is valid.
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* It should never happen, excepted the situation when some
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* piece of hardware is broken. In such situation just produce
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* error message and return. Caller must continue to handle the
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* signals from other devices if any.
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*/
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if (unlikely(!item)) {
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dev_err(priv->dev, "False signal: at offset:mask 0x%02x:0x%02x.\n",
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item->reg, item->mask);
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return;
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}
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/* Mask event. */
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ret = regmap_write(priv->regmap, item->reg + MLXREG_HOTPLUG_MASK_OFF,
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0);
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if (ret)
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goto out;
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/* Read status. */
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ret = regmap_read(priv->regmap, item->reg, ®val);
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if (ret)
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goto out;
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/* Set asserted bits and save last status. */
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regval &= item->mask;
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asserted = item->cache ^ regval;
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item->cache = regval;
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for_each_set_bit(bit, &asserted, 8) {
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data = item->data + bit;
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if (regval & BIT(bit)) {
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if (item->inversed)
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mlxreg_hotplug_device_destroy(priv, data);
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else
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mlxreg_hotplug_device_create(priv, data);
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} else {
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if (item->inversed)
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mlxreg_hotplug_device_create(priv, data);
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else
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mlxreg_hotplug_device_destroy(priv, data);
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}
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}
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/* Acknowledge event. */
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ret = regmap_write(priv->regmap, item->reg + MLXREG_HOTPLUG_EVENT_OFF,
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0);
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if (ret)
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goto out;
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/* Unmask event. */
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ret = regmap_write(priv->regmap, item->reg + MLXREG_HOTPLUG_MASK_OFF,
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item->mask);
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out:
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if (ret)
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dev_err(priv->dev, "Failed to complete workqueue.\n");
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}
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static void
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mlxreg_hotplug_health_work_helper(struct mlxreg_hotplug_priv_data *priv,
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struct mlxreg_core_item *item)
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{
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struct mlxreg_core_data *data = item->data;
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u32 regval;
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int i, ret = 0;
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for (i = 0; i < item->count; i++, data++) {
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/* Mask event. */
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ret = regmap_write(priv->regmap, data->reg +
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MLXREG_HOTPLUG_MASK_OFF, 0);
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if (ret)
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goto out;
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/* Read status. */
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ret = regmap_read(priv->regmap, data->reg, ®val);
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if (ret)
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goto out;
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regval &= data->mask;
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if (item->cache == regval)
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goto ack_event;
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/*
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* ASIC health indication is provided through two bits. Bits
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* value 0x2 indicates that ASIC reached the good health, value
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* 0x0 indicates ASIC the bad health or dormant state and value
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* 0x3 indicates the booting state. During ASIC reset it should
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* pass the following states: dormant -> booting -> good.
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*/
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if (regval == MLXREG_HOTPLUG_GOOD_HEALTH_MASK) {
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if (!data->attached) {
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/*
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* ASIC is in steady state. Connect associated
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* device, if configured.
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*/
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mlxreg_hotplug_device_create(priv, data);
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data->attached = true;
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}
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} else {
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if (data->attached) {
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/*
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* ASIC health is failed after ASIC has been
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* in steady state. Disconnect associated
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* device, if it has been connected.
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*/
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mlxreg_hotplug_device_destroy(priv, data);
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data->attached = false;
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data->health_cntr = 0;
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}
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}
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item->cache = regval;
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ack_event:
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/* Acknowledge event. */
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ret = regmap_write(priv->regmap, data->reg +
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MLXREG_HOTPLUG_EVENT_OFF, 0);
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if (ret)
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goto out;
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/* Unmask event. */
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ret = regmap_write(priv->regmap, data->reg +
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MLXREG_HOTPLUG_MASK_OFF, data->mask);
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if (ret)
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goto out;
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}
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out:
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if (ret)
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dev_err(priv->dev, "Failed to complete workqueue.\n");
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}
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/*
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* mlxreg_hotplug_work_handler - performs traversing of device interrupt
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* registers according to the below hierarchy schema:
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*
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* Aggregation registers (status/mask)
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* PSU registers: *---*
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* *-----------------* | |
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* |status/event/mask|-----> | * |
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* *-----------------* | |
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* Power registers: | |
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* *-----------------* | |
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* |status/event/mask|-----> | * |
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* *-----------------* | |
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* FAN registers: | |--> CPU
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* *-----------------* | |
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* |status/event/mask|-----> | * |
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* *-----------------* | |
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* ASIC registers: | |
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* *-----------------* | |
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* |status/event/mask|-----> | * |
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* *-----------------* | |
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* *---*
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*
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* In case some system changed are detected: FAN in/out, PSU in/out, power
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* cable attached/detached, ASIC health good/bad, relevant device is created
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* or destroyed.
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*/
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static void mlxreg_hotplug_work_handler(struct work_struct *work)
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{
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struct mlxreg_core_hotplug_platform_data *pdata;
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struct mlxreg_hotplug_priv_data *priv;
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struct mlxreg_core_item *item;
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u32 regval, aggr_asserted;
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unsigned long flags;
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int i, ret;
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priv = container_of(work, struct mlxreg_hotplug_priv_data,
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dwork_irq.work);
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pdata = dev_get_platdata(&priv->pdev->dev);
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item = pdata->items;
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/* Mask aggregation event. */
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ret = regmap_write(priv->regmap, pdata->cell +
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MLXREG_HOTPLUG_AGGR_MASK_OFF, 0);
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if (ret < 0)
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goto out;
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/* Read aggregation status. */
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ret = regmap_read(priv->regmap, pdata->cell, ®val);
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if (ret)
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goto out;
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regval &= pdata->mask;
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aggr_asserted = priv->aggr_cache ^ regval;
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priv->aggr_cache = regval;
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/*
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* Handler is invoked, but no assertion is detected at top aggregation
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* status level. Set aggr_asserted to mask value to allow handler extra
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* run over all relevant signals to recover any missed signal.
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*/
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if (priv->not_asserted == MLXREG_HOTPLUG_NOT_ASSERT) {
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priv->not_asserted = 0;
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aggr_asserted = pdata->mask;
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}
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if (!aggr_asserted)
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goto unmask_event;
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/* Handle topology and health configuration changes. */
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for (i = 0; i < pdata->counter; i++, item++) {
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if (aggr_asserted & item->aggr_mask) {
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if (item->health)
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mlxreg_hotplug_health_work_helper(priv, item);
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else
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mlxreg_hotplug_work_helper(priv, item);
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}
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}
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spin_lock_irqsave(&priv->lock, flags);
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/*
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* It is possible, that some signals have been inserted, while
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* interrupt has been masked by mlxreg_hotplug_work_handler. In this
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* case such signals will be missed. In order to handle these signals
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* delayed work is canceled and work task re-scheduled for immediate
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* execution. It allows to handle missed signals, if any. In other case
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* work handler just validates that no new signals have been received
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* during masking.
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*/
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cancel_delayed_work(&priv->dwork_irq);
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schedule_delayed_work(&priv->dwork_irq, 0);
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spin_unlock_irqrestore(&priv->lock, flags);
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return;
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unmask_event:
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priv->not_asserted++;
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/* Unmask aggregation event (no need acknowledge). */
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ret = regmap_write(priv->regmap, pdata->cell +
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MLXREG_HOTPLUG_AGGR_MASK_OFF, pdata->mask);
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out:
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if (ret)
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dev_err(priv->dev, "Failed to complete workqueue.\n");
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}
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static int mlxreg_hotplug_set_irq(struct mlxreg_hotplug_priv_data *priv)
|
|
{
|
|
struct mlxreg_core_hotplug_platform_data *pdata;
|
|
struct mlxreg_core_item *item;
|
|
struct mlxreg_core_data *data;
|
|
u32 regval;
|
|
int i, j, ret;
|
|
|
|
pdata = dev_get_platdata(&priv->pdev->dev);
|
|
item = pdata->items;
|
|
|
|
for (i = 0; i < pdata->counter; i++, item++) {
|
|
if (item->capability) {
|
|
/*
|
|
* Read group capability register to get actual number
|
|
* of interrupt capable components and set group mask
|
|
* accordingly.
|
|
*/
|
|
ret = regmap_read(priv->regmap, item->capability,
|
|
®val);
|
|
if (ret)
|
|
goto out;
|
|
|
|
item->mask = GENMASK((regval & item->mask) - 1, 0);
|
|
}
|
|
|
|
/* Clear group presense event. */
|
|
ret = regmap_write(priv->regmap, item->reg +
|
|
MLXREG_HOTPLUG_EVENT_OFF, 0);
|
|
if (ret)
|
|
goto out;
|
|
|
|
/*
|
|
* Verify if hardware configuration requires to disable
|
|
* interrupt capability for some of components.
|
|
*/
|
|
data = item->data;
|
|
for (j = 0; j < item->count; j++, data++) {
|
|
/* Verify if the attribute has capability register. */
|
|
if (data->capability) {
|
|
/* Read capability register. */
|
|
ret = regmap_read(priv->regmap,
|
|
data->capability, ®val);
|
|
if (ret)
|
|
goto out;
|
|
|
|
if (!(regval & data->bit))
|
|
item->mask &= ~BIT(j);
|
|
}
|
|
}
|
|
|
|
/* Set group initial status as mask and unmask group event. */
|
|
if (item->inversed) {
|
|
item->cache = item->mask;
|
|
ret = regmap_write(priv->regmap, item->reg +
|
|
MLXREG_HOTPLUG_MASK_OFF,
|
|
item->mask);
|
|
if (ret)
|
|
goto out;
|
|
}
|
|
}
|
|
|
|
/* Keep aggregation initial status as zero and unmask events. */
|
|
ret = regmap_write(priv->regmap, pdata->cell +
|
|
MLXREG_HOTPLUG_AGGR_MASK_OFF, pdata->mask);
|
|
if (ret)
|
|
goto out;
|
|
|
|
/* Keep low aggregation initial status as zero and unmask events. */
|
|
if (pdata->cell_low) {
|
|
ret = regmap_write(priv->regmap, pdata->cell_low +
|
|
MLXREG_HOTPLUG_AGGR_MASK_OFF,
|
|
pdata->mask_low);
|
|
if (ret)
|
|
goto out;
|
|
}
|
|
|
|
/* Invoke work handler for initializing hot plug devices setting. */
|
|
mlxreg_hotplug_work_handler(&priv->dwork_irq.work);
|
|
|
|
out:
|
|
if (ret)
|
|
dev_err(priv->dev, "Failed to set interrupts.\n");
|
|
enable_irq(priv->irq);
|
|
return ret;
|
|
}
|
|
|
|
static void mlxreg_hotplug_unset_irq(struct mlxreg_hotplug_priv_data *priv)
|
|
{
|
|
struct mlxreg_core_hotplug_platform_data *pdata;
|
|
struct mlxreg_core_item *item;
|
|
struct mlxreg_core_data *data;
|
|
int count, i, j;
|
|
|
|
pdata = dev_get_platdata(&priv->pdev->dev);
|
|
item = pdata->items;
|
|
disable_irq(priv->irq);
|
|
cancel_delayed_work_sync(&priv->dwork_irq);
|
|
|
|
/* Mask low aggregation event, if defined. */
|
|
if (pdata->cell_low)
|
|
regmap_write(priv->regmap, pdata->cell_low +
|
|
MLXREG_HOTPLUG_AGGR_MASK_OFF, 0);
|
|
|
|
/* Mask aggregation event. */
|
|
regmap_write(priv->regmap, pdata->cell + MLXREG_HOTPLUG_AGGR_MASK_OFF,
|
|
0);
|
|
|
|
/* Clear topology configurations. */
|
|
for (i = 0; i < pdata->counter; i++, item++) {
|
|
data = item->data;
|
|
/* Mask group presense event. */
|
|
regmap_write(priv->regmap, data->reg + MLXREG_HOTPLUG_MASK_OFF,
|
|
0);
|
|
/* Clear group presense event. */
|
|
regmap_write(priv->regmap, data->reg +
|
|
MLXREG_HOTPLUG_EVENT_OFF, 0);
|
|
|
|
/* Remove all the attached devices in group. */
|
|
count = item->count;
|
|
for (j = 0; j < count; j++, data++)
|
|
mlxreg_hotplug_device_destroy(priv, data);
|
|
}
|
|
}
|
|
|
|
static irqreturn_t mlxreg_hotplug_irq_handler(int irq, void *dev)
|
|
{
|
|
struct mlxreg_hotplug_priv_data *priv;
|
|
|
|
priv = (struct mlxreg_hotplug_priv_data *)dev;
|
|
|
|
/* Schedule work task for immediate execution.*/
|
|
schedule_delayed_work(&priv->dwork_irq, 0);
|
|
|
|
return IRQ_HANDLED;
|
|
}
|
|
|
|
static int mlxreg_hotplug_probe(struct platform_device *pdev)
|
|
{
|
|
struct mlxreg_core_hotplug_platform_data *pdata;
|
|
struct mlxreg_hotplug_priv_data *priv;
|
|
struct i2c_adapter *deferred_adap;
|
|
int err;
|
|
|
|
pdata = dev_get_platdata(&pdev->dev);
|
|
if (!pdata) {
|
|
dev_err(&pdev->dev, "Failed to get platform data.\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
/* Defer probing if the necessary adapter is not configured yet. */
|
|
deferred_adap = i2c_get_adapter(pdata->deferred_nr);
|
|
if (!deferred_adap)
|
|
return -EPROBE_DEFER;
|
|
i2c_put_adapter(deferred_adap);
|
|
|
|
priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
|
|
if (!priv)
|
|
return -ENOMEM;
|
|
|
|
if (pdata->irq) {
|
|
priv->irq = pdata->irq;
|
|
} else {
|
|
priv->irq = platform_get_irq(pdev, 0);
|
|
if (priv->irq < 0)
|
|
return priv->irq;
|
|
}
|
|
|
|
priv->regmap = pdata->regmap;
|
|
priv->dev = pdev->dev.parent;
|
|
priv->pdev = pdev;
|
|
|
|
err = devm_request_irq(&pdev->dev, priv->irq,
|
|
mlxreg_hotplug_irq_handler, IRQF_TRIGGER_FALLING
|
|
| IRQF_SHARED, "mlxreg-hotplug", priv);
|
|
if (err) {
|
|
dev_err(&pdev->dev, "Failed to request irq: %d\n", err);
|
|
return err;
|
|
}
|
|
|
|
disable_irq(priv->irq);
|
|
spin_lock_init(&priv->lock);
|
|
INIT_DELAYED_WORK(&priv->dwork_irq, mlxreg_hotplug_work_handler);
|
|
dev_set_drvdata(&pdev->dev, priv);
|
|
|
|
err = mlxreg_hotplug_attr_init(priv);
|
|
if (err) {
|
|
dev_err(&pdev->dev, "Failed to allocate attributes: %d\n",
|
|
err);
|
|
return err;
|
|
}
|
|
|
|
priv->hwmon = devm_hwmon_device_register_with_groups(&pdev->dev,
|
|
"mlxreg_hotplug", priv, priv->groups);
|
|
if (IS_ERR(priv->hwmon)) {
|
|
dev_err(&pdev->dev, "Failed to register hwmon device %ld\n",
|
|
PTR_ERR(priv->hwmon));
|
|
return PTR_ERR(priv->hwmon);
|
|
}
|
|
|
|
/* Perform initial interrupts setup. */
|
|
mlxreg_hotplug_set_irq(priv);
|
|
priv->after_probe = true;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int mlxreg_hotplug_remove(struct platform_device *pdev)
|
|
{
|
|
struct mlxreg_hotplug_priv_data *priv = dev_get_drvdata(&pdev->dev);
|
|
|
|
/* Clean interrupts setup. */
|
|
mlxreg_hotplug_unset_irq(priv);
|
|
devm_free_irq(&pdev->dev, priv->irq, priv);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct platform_driver mlxreg_hotplug_driver = {
|
|
.driver = {
|
|
.name = "mlxreg-hotplug",
|
|
},
|
|
.probe = mlxreg_hotplug_probe,
|
|
.remove = mlxreg_hotplug_remove,
|
|
};
|
|
|
|
module_platform_driver(mlxreg_hotplug_driver);
|
|
|
|
MODULE_AUTHOR("Vadim Pasternak <vadimp@mellanox.com>");
|
|
MODULE_DESCRIPTION("Mellanox regmap hotplug platform driver");
|
|
MODULE_LICENSE("Dual BSD/GPL");
|
|
MODULE_ALIAS("platform:mlxreg-hotplug");
|