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| author | Boris Brezillon <boris.brezillon@collabora.com> | 2020-02-27 12:31:07 +0100 |
|---|---|---|
| committer | Boris Brezillon <boris.brezillon@collabora.com> | 2020-02-28 09:35:52 +0100 |
| commit | 7ec0ddb007cf2bdc4531b5100f35c084028d4587 (patch) | |
| tree | 2d8f38c5aa9d51c90fab775bae571b52974ce314 /drivers/i3c | |
| parent | 12e21a23ccf3bdd1e3207001422235e24d865ac4 (diff) | |
| download | linux-7ec0ddb007cf2bdc4531b5100f35c084028d4587.tar.gz linux-7ec0ddb007cf2bdc4531b5100f35c084028d4587.tar.bz2 linux-7ec0ddb007cf2bdc4531b5100f35c084028d4587.zip | |
i3c: Add a modalias sysfs attribute
Create a modalias sysfs attribute for i3c devices.
Signed-off-by: Boris Brezillon <boris.brezillon@collabora.com>
Signed-off-by: Vitor Soares <vitor.soares@synopsys.com>
Link: https://lore.kernel.org/linux-i3c/a90f64f830128cd12762153de7828b775574c156.1582796652.git.vitor.soares@synopsys.com
Diffstat (limited to 'drivers/i3c')
| -rw-r--r-- | drivers/i3c/master.c | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/drivers/i3c/master.c b/drivers/i3c/master.c index b6db82862a63..925e1ed18a2a 100644 --- a/drivers/i3c/master.c +++ b/drivers/i3c/master.c @@ -241,12 +241,34 @@ out: } static DEVICE_ATTR_RO(hdrcap); +static ssize_t modalias_show(struct device *dev, + struct device_attribute *da, char *buf) +{ + struct i3c_device *i3c = dev_to_i3cdev(dev); + struct i3c_device_info devinfo; + u16 manuf, part, ext; + + i3c_device_get_info(i3c, &devinfo); + manuf = I3C_PID_MANUF_ID(devinfo.pid); + part = I3C_PID_PART_ID(devinfo.pid); + ext = I3C_PID_EXTRA_INFO(devinfo.pid); + + if (I3C_PID_RND_LOWER_32BITS(devinfo.pid)) + return sprintf(buf, "i3c:dcr%02Xmanuf%04X", devinfo.dcr, + manuf); + + return sprintf(buf, "i3c:dcr%02Xmanuf%04Xpart%04Xext%04X", + devinfo.dcr, manuf, part, ext); +} +static DEVICE_ATTR_RO(modalias); + static struct attribute *i3c_device_attrs[] = { &dev_attr_bcr.attr, &dev_attr_dcr.attr, &dev_attr_pid.attr, &dev_attr_dynamic_address.attr, &dev_attr_hdrcap.attr, + &dev_attr_modalias.attr, NULL, }; ATTRIBUTE_GROUPS(i3c_device); |