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| author |   Alexander Usyskin <alexander.usyskin@intel.com> | 2020-07-28 22:22:42 +0300 |
|---|---|---|
| committer |   Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-07-29 16:21:13 +0200 |
| commit | 2f79d3d1f7f0885d574811f80c6e0473ab8ef5ab (patch) | |
| tree | a0933f7d965e9b0b2020a2c5f4a9809a5e4acfe7 /drivers/misc/mei/main.c | |
| parent | MAINTAINERS: Fix maintainer entry for mei driver (diff) | |
| download | linux-dev-2f79d3d1f7f0885d574811f80c6e0473ab8ef5ab.tar.xz linux-dev-2f79d3d1f7f0885d574811f80c6e0473ab8ef5ab.zip | |
mei: add device kind to sysfs
Some of the mei device heads are not generic and have
a specific purpose, we need to announce it to the user space
so it is possible to detect the correct device node via
matching attributes.
Generic heads are marked as 'mei' while special purpose heads
have their own names. Currently we are adding 'itouch' string
for Intel IPTS 1.0, 2.0 devices.
This is done via new sysfs attribute 'kind'.
Signed-off-by: Alexander Usyskin <alexander.usyskin@intel.com>
Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Link: https://lore.kernel.org/r/20200728192242.3117779-1-tomas.winkler@intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/misc/mei/main.c')
| -rw-r--r-- | drivers/misc/mei/main.c | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/drivers/misc/mei/main.c b/drivers/misc/mei/main.c index 05e6ad6d4d54..86ef5c1a7928 100644 --- a/drivers/misc/mei/main.c +++ b/drivers/misc/mei/main.c @@ -885,6 +885,30 @@ void mei_set_devstate(struct mei_device *dev, enum mei_dev_state state) } } +/** + * kind_show - display device kind + * + * @device: device pointer + * @attr: attribute pointer + * @buf: char out buffer + * + * Return: number of the bytes printed into buf or error + */ +static ssize_t kind_show(struct device *device, + struct device_attribute *attr, char *buf) +{ + struct mei_device *dev = dev_get_drvdata(device); + ssize_t ret; + + if (dev->kind) + ret = sprintf(buf, "%s\n", dev->kind); + else + ret = sprintf(buf, "%s\n", "mei"); + + return ret; +} +static DEVICE_ATTR_RO(kind); + static struct attribute *mei_attrs[] = { &dev_attr_fw_status.attr, &dev_attr_hbm_ver.attr, @@ -893,6 +917,7 @@ static struct attribute *mei_attrs[] = { &dev_attr_fw_ver.attr, &dev_attr_dev_state.attr, &dev_attr_trc.attr, + &dev_attr_kind.attr, NULL }; ATTRIBUTE_GROUPS(mei); |