1 /*
2 * NXP GPMI NAND flash driver (DT initialization)
3 *
4 * Copyright (C) 2018 Toradex
5 * Authors:
6 * Stefan Agner <stefan.agner@toradex.com>
7 *
8 * Based on denali_dt.c
9 *
10 * SPDX-License-Identifier: GPL-2.0+
11 */
12
13 #include <dm.h>
14 #include <linux/io.h>
15 #include <linux/ioport.h>
16 #include <linux/printk.h>
17
18 #include "mxs_nand.h"
19
20 struct mxs_nand_dt_data {
21 unsigned int max_ecc_strength_supported;
22 };
23
24 static const struct mxs_nand_dt_data mxs_nand_imx6q_data = {
25 .max_ecc_strength_supported = 40,
26 };
27
28 static const struct mxs_nand_dt_data mxs_nand_imx7d_data = {
29 .max_ecc_strength_supported = 62,
30 };
31
32 static const struct udevice_id mxs_nand_dt_ids[] = {
33 {
34 .compatible = "fsl,imx6q-gpmi-nand",
35 .data = (unsigned long)&mxs_nand_imx6q_data,
36 },
37 {
38 .compatible = "fsl,imx7d-gpmi-nand",
39 .data = (unsigned long)&mxs_nand_imx7d_data,
40 },
41 { /* sentinel */ }
42 };
43
mxs_nand_dt_probe(struct udevice * dev)44 static int mxs_nand_dt_probe(struct udevice *dev)
45 {
46 struct mxs_nand_info *info = dev_get_priv(dev);
47 const struct mxs_nand_dt_data *data;
48 struct resource res;
49 int ret;
50
51 data = (void *)dev_get_driver_data(dev);
52 if (data)
53 info->max_ecc_strength_supported = data->max_ecc_strength_supported;
54
55 info->dev = dev;
56
57 ret = dev_read_resource_byname(dev, "gpmi-nand", &res);
58 if (ret)
59 return ret;
60
61 info->gpmi_regs = devm_ioremap(dev, res.start, resource_size(&res));
62
63
64 ret = dev_read_resource_byname(dev, "bch", &res);
65 if (ret)
66 return ret;
67
68 info->bch_regs = devm_ioremap(dev, res.start, resource_size(&res));
69
70 info->use_minimum_ecc = dev_read_bool(dev, "fsl,use-minimum-ecc");
71
72 return mxs_nand_init_ctrl(info);
73 }
74
75 U_BOOT_DRIVER(mxs_nand_dt) = {
76 .name = "mxs-nand-dt",
77 .id = UCLASS_MTD,
78 .of_match = mxs_nand_dt_ids,
79 .probe = mxs_nand_dt_probe,
80 .priv_auto_alloc_size = sizeof(struct mxs_nand_info),
81 };
82
board_nand_init(void)83 void board_nand_init(void)
84 {
85 struct udevice *dev;
86 int ret;
87
88 ret = uclass_get_device_by_driver(UCLASS_MTD,
89 DM_GET_DRIVER(mxs_nand_dt),
90 &dev);
91 if (ret && ret != -ENODEV)
92 pr_err("Failed to initialize MXS NAND controller. (error %d)\n",
93 ret);
94 }
95