2 * NAND Flash Controller Device Driver for DT
4 * Copyright © 2011, Picochip.
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.
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
15 #include <linux/clk.h>
16 #include <linux/err.h>
18 #include <linux/ioport.h>
19 #include <linux/kernel.h>
20 #include <linux/module.h>
21 #include <linux/platform_device.h>
23 #include <linux/of_device.h>
28 struct denali_nand_info denali;
32 struct denali_dt_data {
33 unsigned int revision;
35 const struct nand_ecc_caps *ecc_caps;
38 NAND_ECC_CAPS_SINGLE(denali_socfpga_ecc_caps, denali_calc_ecc_bytes,
40 static const struct denali_dt_data denali_socfpga_data = {
41 .caps = DENALI_CAP_HW_ECC_FIXUP,
42 .ecc_caps = &denali_socfpga_ecc_caps,
45 static const struct of_device_id denali_nand_dt_ids[] = {
47 .compatible = "altr,socfpga-denali-nand",
48 .data = &denali_socfpga_data,
52 MODULE_DEVICE_TABLE(of, denali_nand_dt_ids);
54 static int denali_dt_probe(struct platform_device *pdev)
58 const struct denali_dt_data *data;
59 struct denali_nand_info *denali;
62 dt = devm_kzalloc(&pdev->dev, sizeof(*dt), GFP_KERNEL);
67 data = of_device_get_match_data(&pdev->dev);
69 denali->revision = data->revision;
70 denali->caps = data->caps;
71 denali->ecc_caps = data->ecc_caps;
74 denali->platform = DT;
75 denali->dev = &pdev->dev;
76 denali->irq = platform_get_irq(pdev, 0);
77 if (denali->irq < 0) {
78 dev_err(&pdev->dev, "no irq defined\n");
82 res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "denali_reg");
83 denali->flash_reg = devm_ioremap_resource(&pdev->dev, res);
84 if (IS_ERR(denali->flash_reg))
85 return PTR_ERR(denali->flash_reg);
87 res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "nand_data");
88 denali->flash_mem = devm_ioremap_resource(&pdev->dev, res);
89 if (IS_ERR(denali->flash_mem))
90 return PTR_ERR(denali->flash_mem);
92 dt->clk = devm_clk_get(&pdev->dev, NULL);
93 if (IS_ERR(dt->clk)) {
94 dev_err(&pdev->dev, "no clk available\n");
95 return PTR_ERR(dt->clk);
97 clk_prepare_enable(dt->clk);
99 ret = denali_init(denali);
101 goto out_disable_clk;
103 platform_set_drvdata(pdev, dt);
107 clk_disable_unprepare(dt->clk);
112 static int denali_dt_remove(struct platform_device *pdev)
114 struct denali_dt *dt = platform_get_drvdata(pdev);
116 denali_remove(&dt->denali);
117 clk_disable_unprepare(dt->clk);
122 static struct platform_driver denali_dt_driver = {
123 .probe = denali_dt_probe,
124 .remove = denali_dt_remove,
126 .name = "denali-nand-dt",
127 .of_match_table = denali_nand_dt_ids,
131 module_platform_driver(denali_dt_driver);
133 MODULE_LICENSE("GPL");
134 MODULE_AUTHOR("Jamie Iles");
135 MODULE_DESCRIPTION("DT driver for Denali NAND controller");