Commit | Line | Data |
---|---|---|
30f9f2fb DN |
1 | /* |
2 | * NAND Flash Controller Device Driver for DT | |
3 | * | |
4 | * Copyright © 2011, Picochip. | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify it | |
7 | * under the terms and conditions of the GNU General Public License, | |
8 | * version 2, as published by the Free Software Foundation. | |
9 | * | |
10 | * This program is distributed in the hope it will be useful, but WITHOUT | |
11 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
12 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for | |
13 | * more details. | |
14 | */ | |
15 | #include <linux/clk.h> | |
16 | #include <linux/err.h> | |
17 | #include <linux/io.h> | |
18 | #include <linux/ioport.h> | |
19 | #include <linux/kernel.h> | |
20 | #include <linux/module.h> | |
21 | #include <linux/platform_device.h> | |
22 | #include <linux/of.h> | |
23 | #include <linux/of_device.h> | |
24 | #include <linux/slab.h> | |
25 | ||
26 | #include "denali.h" | |
27 | ||
28 | struct denali_dt { | |
29 | struct denali_nand_info denali; | |
30 | struct clk *clk; | |
31 | }; | |
32 | ||
30f9f2fb DN |
33 | static const struct of_device_id denali_nand_dt_ids[] = { |
34 | { .compatible = "denali,denali-nand-dt" }, | |
35 | { /* sentinel */ } | |
36 | }; | |
37 | ||
38 | MODULE_DEVICE_TABLE(of, denali_nand_dt_ids); | |
39 | ||
40 | static u64 denali_dma_mask; | |
41 | ||
06f25510 | 42 | static int denali_dt_probe(struct platform_device *ofdev) |
30f9f2fb DN |
43 | { |
44 | struct resource *denali_reg, *nand_data; | |
45 | struct denali_dt *dt; | |
46 | struct denali_nand_info *denali; | |
47 | int ret; | |
48 | const struct of_device_id *of_id; | |
49 | ||
50 | of_id = of_match_device(denali_nand_dt_ids, &ofdev->dev); | |
51 | if (of_id) { | |
52 | ofdev->id_entry = of_id->data; | |
53 | } else { | |
54 | pr_err("Failed to find the right device id.\n"); | |
55 | return -ENOMEM; | |
56 | } | |
57 | ||
58 | dt = devm_kzalloc(&ofdev->dev, sizeof(*dt), GFP_KERNEL); | |
59 | if (!dt) | |
60 | return -ENOMEM; | |
61 | denali = &dt->denali; | |
62 | ||
30f9f2fb DN |
63 | denali->platform = DT; |
64 | denali->dev = &ofdev->dev; | |
65 | denali->irq = platform_get_irq(ofdev, 0); | |
66 | if (denali->irq < 0) { | |
67 | dev_err(&ofdev->dev, "no irq defined\n"); | |
2f2ff14c | 68 | return denali->irq; |
30f9f2fb DN |
69 | } |
70 | ||
7995204e JH |
71 | denali_reg = platform_get_resource_byname(ofdev, IORESOURCE_MEM, "denali_reg"); |
72 | denali->flash_reg = devm_ioremap_resource(&ofdev->dev, denali_reg); | |
73 | if (IS_ERR(denali->flash_reg)) | |
74 | return PTR_ERR(denali->flash_reg); | |
30f9f2fb | 75 | |
7995204e JH |
76 | nand_data = platform_get_resource_byname(ofdev, IORESOURCE_MEM, "nand_data"); |
77 | denali->flash_mem = devm_ioremap_resource(&ofdev->dev, nand_data); | |
78 | if (IS_ERR(denali->flash_mem)) | |
79 | return PTR_ERR(denali->flash_mem); | |
30f9f2fb DN |
80 | |
81 | if (!of_property_read_u32(ofdev->dev.of_node, | |
82 | "dma-mask", (u32 *)&denali_dma_mask)) { | |
83 | denali->dev->dma_mask = &denali_dma_mask; | |
84 | } else { | |
85 | denali->dev->dma_mask = NULL; | |
86 | } | |
87 | ||
2281f7b6 | 88 | dt->clk = devm_clk_get(&ofdev->dev, NULL); |
30f9f2fb DN |
89 | if (IS_ERR(dt->clk)) { |
90 | dev_err(&ofdev->dev, "no clk available\n"); | |
91 | return PTR_ERR(dt->clk); | |
92 | } | |
93 | clk_prepare_enable(dt->clk); | |
94 | ||
95 | ret = denali_init(denali); | |
96 | if (ret) | |
97 | goto out_disable_clk; | |
98 | ||
99 | platform_set_drvdata(ofdev, dt); | |
100 | return 0; | |
101 | ||
102 | out_disable_clk: | |
103 | clk_disable_unprepare(dt->clk); | |
30f9f2fb DN |
104 | |
105 | return ret; | |
106 | } | |
107 | ||
810b7e06 | 108 | static int denali_dt_remove(struct platform_device *ofdev) |
30f9f2fb DN |
109 | { |
110 | struct denali_dt *dt = platform_get_drvdata(ofdev); | |
111 | ||
112 | denali_remove(&dt->denali); | |
113 | clk_disable(dt->clk); | |
30f9f2fb DN |
114 | |
115 | return 0; | |
116 | } | |
117 | ||
118 | static struct platform_driver denali_dt_driver = { | |
119 | .probe = denali_dt_probe, | |
5153b88c | 120 | .remove = denali_dt_remove, |
30f9f2fb DN |
121 | .driver = { |
122 | .name = "denali-nand-dt", | |
ef54f873 | 123 | .of_match_table = denali_nand_dt_ids, |
30f9f2fb DN |
124 | }, |
125 | }; | |
126 | ||
82fc812c | 127 | module_platform_driver(denali_dt_driver); |
30f9f2fb DN |
128 | |
129 | MODULE_LICENSE("GPL"); | |
130 | MODULE_AUTHOR("Jamie Iles"); | |
131 | MODULE_DESCRIPTION("DT driver for Denali NAND controller"); |