W83791D_REG_CONFIG
if (w83791d_read(client, W83791D_REG_CONFIG) & 0x80)
w83791d_write(client, W83791D_REG_CONFIG, 0x80);
tmp = w83791d_read(client, W83791D_REG_CONFIG) & 0xf7;
w83791d_write(client, W83791D_REG_CONFIG, tmp | 0x01);