From 12005ec33f3a7eac0d508dde52cc9eeea2595ee9 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Maxime=20Roussin-B=C3=A9langer?= Date: Sun, 22 Jul 2018 23:33:29 -0400 Subject: hwmon: (iio_hwmon) Use devm functions MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Use devm_iio_channel_get_all() to automatically release channels. Use devm_hwmon_device_register_with_groups() to automatically unregister the device. Signed-off-by: Maxime Roussin-Bélanger [groeck: Dropped now unnecessary platform_set_drvdata() and hwmon_dev] Signed-off-by: Guenter Roeck --- drivers/hwmon/iio_hwmon.c | 67 +++++++++++++---------------------------------- 1 file changed, 18 insertions(+), 49 deletions(-) (limited to 'drivers/hwmon') diff --git a/drivers/hwmon/iio_hwmon.c b/drivers/hwmon/iio_hwmon.c index 69031a0f7ed2..2f3f875c06ac 100644 --- a/drivers/hwmon/iio_hwmon.c +++ b/drivers/hwmon/iio_hwmon.c @@ -22,7 +22,6 @@ * struct iio_hwmon_state - device instance state * @channels: filled with array of channels from iio * @num_channels: number of channels in channels (saves counting twice) - * @hwmon_dev: associated hwmon device * @attr_group: the group of attributes * @groups: null terminated array of attribute groups * @attrs: null terminated array of attribute pointers. @@ -30,7 +29,6 @@ struct iio_hwmon_state { struct iio_channel *channels; int num_channels; - struct device *hwmon_dev; struct attribute_group attr_group; const struct attribute_group *groups[2]; struct attribute **attrs; @@ -68,12 +66,13 @@ static int iio_hwmon_probe(struct platform_device *pdev) enum iio_chan_type type; struct iio_channel *channels; const char *name = "iio_hwmon"; + struct device *hwmon_dev; char *sname; if (dev->of_node && dev->of_node->name) name = dev->of_node->name; - channels = iio_channel_get_all(dev); + channels = devm_iio_channel_get_all(dev); if (IS_ERR(channels)) { if (PTR_ERR(channels) == -ENODEV) return -EPROBE_DEFER; @@ -81,10 +80,8 @@ static int iio_hwmon_probe(struct platform_device *pdev) } st = devm_kzalloc(dev, sizeof(*st), GFP_KERNEL); - if (st == NULL) { - ret = -ENOMEM; - goto error_release_channels; - } + if (st == NULL) + return -ENOMEM; st->channels = channels; @@ -95,22 +92,18 @@ static int iio_hwmon_probe(struct platform_device *pdev) st->attrs = devm_kcalloc(dev, st->num_channels + 1, sizeof(*st->attrs), GFP_KERNEL); - if (st->attrs == NULL) { - ret = -ENOMEM; - goto error_release_channels; - } + if (st->attrs == NULL) + return -ENOMEM; for (i = 0; i < st->num_channels; i++) { a = devm_kzalloc(dev, sizeof(*a), GFP_KERNEL); - if (a == NULL) { - ret = -ENOMEM; - goto error_release_channels; - } + if (a == NULL) + return -ENOMEM; sysfs_attr_init(&a->dev_attr.attr); ret = iio_get_channel_type(&st->channels[i], &type); if (ret < 0) - goto error_release_channels; + return ret; switch (type) { case IIO_VOLTAGE: @@ -134,13 +127,11 @@ static int iio_hwmon_probe(struct platform_device *pdev) humidity_i++); break; default: - ret = -EINVAL; - goto error_release_channels; - } - if (a->dev_attr.attr.name == NULL) { - ret = -ENOMEM; - goto error_release_channels; + return -EINVAL; } + if (a->dev_attr.attr.name == NULL) + return -ENOMEM; + a->dev_attr.show = iio_hwmon_read_val; a->dev_attr.attr.mode = S_IRUGO; a->index = i; @@ -151,34 +142,13 @@ static int iio_hwmon_probe(struct platform_device *pdev) st->groups[0] = &st->attr_group; sname = devm_kstrdup(dev, name, GFP_KERNEL); - if (!sname) { - ret = -ENOMEM; - goto error_release_channels; - } + if (!sname) + return -ENOMEM; strreplace(sname, '-', '_'); - st->hwmon_dev = hwmon_device_register_with_groups(dev, sname, st, - st->groups); - if (IS_ERR(st->hwmon_dev)) { - ret = PTR_ERR(st->hwmon_dev); - goto error_release_channels; - } - platform_set_drvdata(pdev, st); - return 0; - -error_release_channels: - iio_channel_release_all(channels); - return ret; -} - -static int iio_hwmon_remove(struct platform_device *pdev) -{ - struct iio_hwmon_state *st = platform_get_drvdata(pdev); - - hwmon_device_unregister(st->hwmon_dev); - iio_channel_release_all(st->channels); - - return 0; + hwmon_dev = devm_hwmon_device_register_with_groups(dev, sname, st, + st->groups); + return PTR_ERR_OR_ZERO(hwmon_dev); } static const struct of_device_id iio_hwmon_of_match[] = { @@ -193,7 +163,6 @@ static struct platform_driver __refdata iio_hwmon_driver = { .of_match_table = iio_hwmon_of_match, }, .probe = iio_hwmon_probe, - .remove = iio_hwmon_remove, }; module_platform_driver(iio_hwmon_driver); -- cgit v1.2.3