1*4882a593Smuzhiyun /* 2*4882a593Smuzhiyun * Copyright (C) 2015 Thomas Chou <thomas@wytron.com.tw> 3*4882a593Smuzhiyun * 4*4882a593Smuzhiyun * SPDX-License-Identifier: GPL-2.0+ 5*4882a593Smuzhiyun */ 6*4882a593Smuzhiyun 7*4882a593Smuzhiyun #include <common.h> 8*4882a593Smuzhiyun #include <dm.h> 9*4882a593Smuzhiyun #include <dm/device-internal.h> 10*4882a593Smuzhiyun #include <errno.h> 11*4882a593Smuzhiyun #include <mtd.h> 12*4882a593Smuzhiyun 13*4882a593Smuzhiyun /** 14*4882a593Smuzhiyun * mtd_probe - Probe the device @dev if not already done 15*4882a593Smuzhiyun * 16*4882a593Smuzhiyun * @dev: U-Boot device to probe 17*4882a593Smuzhiyun * 18*4882a593Smuzhiyun * @return 0 on success, an error otherwise. 19*4882a593Smuzhiyun */ mtd_probe(struct udevice * dev)20*4882a593Smuzhiyunint mtd_probe(struct udevice *dev) 21*4882a593Smuzhiyun { 22*4882a593Smuzhiyun if (device_active(dev)) 23*4882a593Smuzhiyun return 0; 24*4882a593Smuzhiyun 25*4882a593Smuzhiyun return device_probe(dev); 26*4882a593Smuzhiyun } 27*4882a593Smuzhiyun 28*4882a593Smuzhiyun /* 29*4882a593Smuzhiyun * Implement a MTD uclass which should include most flash drivers. 30*4882a593Smuzhiyun * The uclass private is pointed to mtd_info. 31*4882a593Smuzhiyun */ 32*4882a593Smuzhiyun 33*4882a593Smuzhiyun UCLASS_DRIVER(mtd) = { 34*4882a593Smuzhiyun .id = UCLASS_MTD, 35*4882a593Smuzhiyun .name = "mtd", 36*4882a593Smuzhiyun .per_device_auto_alloc_size = sizeof(struct mtd_info), 37*4882a593Smuzhiyun }; 38