diff options
author | 2016-04-11 10:41:07 +0300 | |
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committer | 2016-04-13 08:17:18 +0300 | |
commit | e09b41010ba33a20a87472ee821fa407a5b8da36 (patch) | |
tree | d10dc367189862e7ca5c592f033dc3726e1df4e3 /kernel/drivers/staging/most/hdm-dim2/dim2_sysfs.c | |
parent | f93b97fd65072de626c074dbe099a1fff05ce060 (diff) |
These changes are the raw update to linux-4.4.6-rt14. Kernel sources
are taken from kernel.org, and rt patch from the rt wiki download page.
During the rebasing, the following patch collided:
Force tick interrupt and get rid of softirq magic(I70131fb85).
Collisions have been removed because its logic was found on the
source already.
Change-Id: I7f57a4081d9deaa0d9ccfc41a6c8daccdee3b769
Signed-off-by: José Pekkarinen <jose.pekkarinen@nokia.com>
Diffstat (limited to 'kernel/drivers/staging/most/hdm-dim2/dim2_sysfs.c')
-rw-r--r-- | kernel/drivers/staging/most/hdm-dim2/dim2_sysfs.c | 117 |
1 files changed, 117 insertions, 0 deletions
diff --git a/kernel/drivers/staging/most/hdm-dim2/dim2_sysfs.c b/kernel/drivers/staging/most/hdm-dim2/dim2_sysfs.c new file mode 100644 index 000000000..c5b10c7d2 --- /dev/null +++ b/kernel/drivers/staging/most/hdm-dim2/dim2_sysfs.c @@ -0,0 +1,117 @@ +/* + * dim2_sysfs.c - MediaLB sysfs information + * + * Copyright (C) 2015, Microchip Technology Germany II GmbH & Co. KG + * + * 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. + * + * This file is licensed under GPLv2. + */ + +/* Author: Andrey Shvetsov <andrey.shvetsov@k2l.de> */ + +#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt + +#include <linux/kernel.h> +#include "dim2_sysfs.h" + +struct bus_attr { + struct attribute attr; + ssize_t (*show)(struct medialb_bus *bus, char *buf); + ssize_t (*store)(struct medialb_bus *bus, const char *buf, + size_t count); +}; + +static ssize_t state_show(struct medialb_bus *bus, char *buf) +{ + bool state = dim2_sysfs_get_state_cb(); + + return sprintf(buf, "%s\n", state ? "locked" : ""); +} + +static struct bus_attr state_attr = __ATTR_RO(state); + +static struct attribute *bus_default_attrs[] = { + &state_attr.attr, + NULL, +}; + +static struct attribute_group bus_attr_group = { + .attrs = bus_default_attrs, +}; + +static void bus_kobj_release(struct kobject *kobj) +{ +} + +static ssize_t bus_kobj_attr_show(struct kobject *kobj, struct attribute *attr, + char *buf) +{ + struct medialb_bus *bus = + container_of(kobj, struct medialb_bus, kobj_group); + struct bus_attr *xattr = container_of(attr, struct bus_attr, attr); + + if (!xattr->show) + return -EIO; + + return xattr->show(bus, buf); +} + +static ssize_t bus_kobj_attr_store(struct kobject *kobj, struct attribute *attr, + const char *buf, size_t count) +{ + ssize_t ret; + struct medialb_bus *bus = + container_of(kobj, struct medialb_bus, kobj_group); + struct bus_attr *xattr = container_of(attr, struct bus_attr, attr); + + if (!xattr->store) + return -EIO; + + ret = xattr->store(bus, buf, count); + return ret; +} + +static struct sysfs_ops const bus_kobj_sysfs_ops = { + .show = bus_kobj_attr_show, + .store = bus_kobj_attr_store, +}; + +static struct kobj_type bus_ktype = { + .release = bus_kobj_release, + .sysfs_ops = &bus_kobj_sysfs_ops, +}; + +int dim2_sysfs_probe(struct medialb_bus *bus, struct kobject *parent_kobj) +{ + int err; + + kobject_init(&bus->kobj_group, &bus_ktype); + err = kobject_add(&bus->kobj_group, parent_kobj, "bus"); + if (err) { + pr_err("kobject_add() failed: %d\n", err); + goto err_kobject_add; + } + + err = sysfs_create_group(&bus->kobj_group, &bus_attr_group); + if (err) { + pr_err("sysfs_create_group() failed: %d\n", err); + goto err_create_group; + } + + return 0; + +err_create_group: + kobject_put(&bus->kobj_group); + +err_kobject_add: + return err; +} + +void dim2_sysfs_destroy(struct medialb_bus *bus) +{ + kobject_put(&bus->kobj_group); +} |