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Subject[PATCH v2 2/4] i3c: Add modalias sysfs attribute
Date
Create modalias sysfs attribute for modalias devices.

Signed-off-by: Boris Brezillon <boris.brezillon@collabora.com>
Signed-off-by: Vitor Soares <vitor.soares@synopsys.com>
---
drivers/i3c/master.c | 22 ++++++++++++++++++++++
1 file changed, 22 insertions(+)

diff --git a/drivers/i3c/master.c b/drivers/i3c/master.c
index b6db828..925e1ed 100644
--- a/drivers/i3c/master.c
+++ b/drivers/i3c/master.c
@@ -241,12 +241,34 @@ static ssize_t hdrcap_show(struct device *dev,
}
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);
--
2.7.4
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