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authorBoris Brezillon <boris.brezillon@collabora.com>2020-02-27 14:31:07 +0300
committerBoris Brezillon <boris.brezillon@collabora.com>2020-02-28 11:35:52 +0300
commit7ec0ddb007cf2bdc4531b5100f35c084028d4587 (patch)
tree2d8f38c5aa9d51c90fab775bae571b52974ce314 /drivers/i3c
parent12e21a23ccf3bdd1e3207001422235e24d865ac4 (diff)
downloadlinux-7ec0ddb007cf2bdc4531b5100f35c084028d4587.tar.xz
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.c22
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);