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net: phy: add sysfs node for reading PHY's registers

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baiywt 2023-05-18 15:55:23 +08:00 committed by orangepi-xunlong
parent 1da4ae0b4a
commit 89e7ff5e58
1 changed files with 58 additions and 0 deletions
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58
drivers/net/phy/phy_device.c
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@ -563,11 +563,69 @@ static ssize_t phy_dev_flags_show(struct device *dev,
}
static DEVICE_ATTR_RO(phy_dev_flags);
static ssize_t
phy_registers_show(struct device *dev, struct device_attribute *attr, char *buf)
{
struct phy_device *phydev = to_phy_device(dev);
int index;
for (index = 0; index < 32; index++)
sprintf(buf, "%s%2d: 0x%x\n", buf, index,
phy_read(phydev, index));
return strlen(buf);
}
static ssize_t
phy_registers_store(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count)
{
struct phy_device *phydev = to_phy_device(dev);
int index = 0, val = 0;
char tmp[32];
char *data;
if (count >= sizeof(tmp))
goto out;
memset(tmp, 0, sizeof(tmp));
memcpy(tmp, buf, count);
data = tmp;
data = strstr(data, " ");
if (!data)
goto out;
*data = 0;
data++;
if (kstrtoint(tmp, 0, &index) || index >= 32)
goto out;
if (kstrtoint(data, 0, &val) || val > 0xffff)
goto out;
pr_info("Set Ethernet PHY register %d to 0x%x\n", (int)index, (int)val);
phy_write(phydev, index, val);
return count;
out:
pr_err("wrong register value input\n");
pr_err("usage: <reg index> <value>\n");
return count;
}
static DEVICE_ATTR_RW(phy_registers);
static struct attribute *phy_dev_attrs[] = {
&dev_attr_phy_id.attr,
&dev_attr_phy_interface.attr,
&dev_attr_phy_has_fixups.attr,
&dev_attr_phy_dev_flags.attr,
&dev_attr_phy_registers.attr,
NULL,
};
ATTRIBUTE_GROUPS(phy_dev);