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 {
36 static const struct denali_dt_data denali_socfpga_data = {
37 .caps = DENALI_CAP_HW_ECC_FIXUP,
40 static const struct of_device_id denali_nand_dt_ids[] = {
42 .compatible = "altr,socfpga-denali-nand",
43 .data = &denali_socfpga_data,
47 MODULE_DEVICE_TABLE(of, denali_nand_dt_ids);
49 static u64 denali_dma_mask;
51 static int denali_dt_probe(struct platform_device *ofdev)
53 struct resource *denali_reg, *nand_data;
55 const struct denali_dt_data *data;
56 struct denali_nand_info *denali;
59 dt = devm_kzalloc(&ofdev->dev, sizeof(*dt), GFP_KERNEL);
64 data = of_device_get_match_data(&ofdev->dev);
66 denali->caps = data->caps;
68 denali->platform = DT;
69 denali->dev = &ofdev->dev;
70 denali->irq = platform_get_irq(ofdev, 0);
71 if (denali->irq < 0) {
72 dev_err(&ofdev->dev, "no irq defined\n");
76 denali_reg = platform_get_resource_byname(ofdev, IORESOURCE_MEM, "denali_reg");
77 denali->flash_reg = devm_ioremap_resource(&ofdev->dev, denali_reg);
78 if (IS_ERR(denali->flash_reg))
79 return PTR_ERR(denali->flash_reg);
81 nand_data = platform_get_resource_byname(ofdev, IORESOURCE_MEM, "nand_data");
82 denali->flash_mem = devm_ioremap_resource(&ofdev->dev, nand_data);
83 if (IS_ERR(denali->flash_mem))
84 return PTR_ERR(denali->flash_mem);
86 if (!of_property_read_u32(ofdev->dev.of_node,
87 "dma-mask", (u32 *)&denali_dma_mask)) {
88 denali->dev->dma_mask = &denali_dma_mask;
90 denali->dev->dma_mask = NULL;
93 dt->clk = devm_clk_get(&ofdev->dev, NULL);
94 if (IS_ERR(dt->clk)) {
95 dev_err(&ofdev->dev, "no clk available\n");
96 return PTR_ERR(dt->clk);
98 clk_prepare_enable(dt->clk);
100 ret = denali_init(denali);
102 goto out_disable_clk;
104 platform_set_drvdata(ofdev, dt);
108 clk_disable_unprepare(dt->clk);
113 static int denali_dt_remove(struct platform_device *ofdev)
115 struct denali_dt *dt = platform_get_drvdata(ofdev);
117 denali_remove(&dt->denali);
118 clk_disable_unprepare(dt->clk);
123 static struct platform_driver denali_dt_driver = {
124 .probe = denali_dt_probe,
125 .remove = denali_dt_remove,
127 .name = "denali-nand-dt",
128 .of_match_table = denali_nand_dt_ids,
132 module_platform_driver(denali_dt_driver);
134 MODULE_LICENSE("GPL");
135 MODULE_AUTHOR("Jamie Iles");
136 MODULE_DESCRIPTION("DT driver for Denali NAND controller");