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

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Change-Id: I76468dd235a39b6f79699b1cc931c2c7bb7bdbc5
Signed-off-by: roger <roger.chen@rock-chips.com>
This commit is contained in:
roger 2016-04-06 18:07:56 +08:00
parent 0c6edb9721
commit 8aeab24a36
1 changed files with 47 additions and 0 deletions
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47
drivers/net/phy/mdio_bus.c
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@ -656,10 +656,57 @@ phy_has_fixups_show(struct device *dev, struct device_attribute *attr, char *buf
}
static DEVICE_ATTR_RO(phy_has_fixups);
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);
long long index, val;
int i;
for (i = 0; i < count; i++) {
if (*(buf + i) == ' ')
break;
}
if (!kstrtoll(buf, 0, &index)) {
pr_err("Please input like1: <reg index> <value>\n");
return count;
}
if (!kstrtoll(buf + i + 1, 0, &val)) {
pr_err("Please input like2: <reg index> <value>\n");
return count;
}
pr_info("Set Ethernet PHY register %d to 0x%x\n", (int)index, (int)val);
phy_write(phydev, index, val);
return count;
}
static DEVICE_ATTR_RW(phy_registers);
static struct attribute *mdio_dev_attrs[] = {
&dev_attr_phy_id.attr,
&dev_attr_phy_interface.attr,
&dev_attr_phy_has_fixups.attr,
&dev_attr_phy_registers.attr,
NULL,
};
ATTRIBUTE_GROUPS(mdio_dev);