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static ssize_t sysfs_reg_io(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count)
{
struct phy_device *phydev = to_phy_device(dev);
struct mii_bus *bus = phydev->bus;
reg_io_mode_t mode = REG_IO_MODE_UNKNOWN;
int busaddr = 0;
u16 regnum = 0;
u16 val = 0;
int result = -1;
//validate input command format
if((buf[0] == 'R' || buf[0] == 'r') && (buf[11] == '\n' || buf[11] == '\0')) {
mode = REG_IO_MODE_READ;
} else if ((buf[0] == 'W' || buf[0] == 'w') && (buf[18] == '\n' || buf[18] == '\0')) {
mode = REG_IO_MODE_WRITE;
} else {
return result;
}
busaddr = (int)((char2hex(buf[4]) << 4) + char2hex(buf[5]));
regnum = (u16)((char2hex(buf[9]) << 4) + char2hex(buf[10]));
if(mode == REG_IO_MODE_READ){
result = mii_bus_read(bus, busaddr, regnum);
} else if(mode == REG_IO_MODE_WRITE){
val = (u16)((char2hex(buf[14]) << 12) + (char2hex(buf[15]) << 8) +
(char2hex(buf[16]) << 4) + char2hex(buf[17]));
result = mii_bus_write(bus, busaddr, regnum, val);
}
return result;
}
static DEVICE_ATTR(reg_io, S_IWUSR
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