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;
37 static const struct denali_dt_data denali_socfpga_data = {
38 .caps = DENALI_CAP_HW_ECC_FIXUP,
41 static const struct of_device_id denali_nand_dt_ids[] = {
43 .compatible = "altr,socfpga-denali-nand",
44 .data = &denali_socfpga_data,
48 MODULE_DEVICE_TABLE(of, denali_nand_dt_ids);
50 static int denali_dt_probe(struct platform_device *pdev)
52 struct resource *denali_reg, *nand_data;
54 const struct denali_dt_data *data;
55 struct denali_nand_info *denali;
58 dt = devm_kzalloc(&pdev->dev, sizeof(*dt), GFP_KERNEL);
63 data = of_device_get_match_data(&pdev->dev);
65 denali->revision = data->revision;
66 denali->caps = data->caps;
69 denali->platform = DT;
70 denali->dev = &pdev->dev;
71 denali->irq = platform_get_irq(pdev, 0);
72 if (denali->irq < 0) {
73 dev_err(&pdev->dev, "no irq defined\n");
77 denali_reg = platform_get_resource_byname(pdev, IORESOURCE_MEM,
79 denali->flash_reg = devm_ioremap_resource(&pdev->dev, denali_reg);
80 if (IS_ERR(denali->flash_reg))
81 return PTR_ERR(denali->flash_reg);
83 nand_data = platform_get_resource_byname(pdev, IORESOURCE_MEM,
85 denali->flash_mem = devm_ioremap_resource(&pdev->dev, nand_data);
86 if (IS_ERR(denali->flash_mem))
87 return PTR_ERR(denali->flash_mem);
89 dt->clk = devm_clk_get(&pdev->dev, NULL);
90 if (IS_ERR(dt->clk)) {
91 dev_err(&pdev->dev, "no clk available\n");
92 return PTR_ERR(dt->clk);
94 clk_prepare_enable(dt->clk);
96 ret = denali_init(denali);
100 platform_set_drvdata(pdev, dt);
104 clk_disable_unprepare(dt->clk);
109 static int denali_dt_remove(struct platform_device *pdev)
111 struct denali_dt *dt = platform_get_drvdata(pdev);
113 denali_remove(&dt->denali);
114 clk_disable_unprepare(dt->clk);
119 static struct platform_driver denali_dt_driver = {
120 .probe = denali_dt_probe,
121 .remove = denali_dt_remove,
123 .name = "denali-nand-dt",
124 .of_match_table = denali_nand_dt_ids,
128 module_platform_driver(denali_dt_driver);
130 MODULE_LICENSE("GPL");
131 MODULE_AUTHOR("Jamie Iles");
132 MODULE_DESCRIPTION("DT driver for Denali NAND controller");