132 lines
3.2 KiB
C
132 lines
3.2 KiB
C
/*
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* NAND Flash Controller Device Driver for DT
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*
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* Copyright © 2011, Picochip.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms and conditions of the GNU General Public License,
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* version 2, as published by the Free Software Foundation.
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*
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*/
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#include <linux/clk.h>
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#include <linux/err.h>
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#include <linux/io.h>
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#include <linux/ioport.h>
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/platform_device.h>
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#include <linux/of.h>
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#include <linux/of_device.h>
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#include <linux/slab.h>
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#include "denali.h"
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struct denali_dt {
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struct denali_nand_info denali;
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struct clk *clk;
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};
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static const struct of_device_id denali_nand_dt_ids[] = {
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{ .compatible = "denali,denali-nand-dt" },
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{ /* sentinel */ }
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};
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MODULE_DEVICE_TABLE(of, denali_nand_dt_ids);
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static u64 denali_dma_mask;
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static int denali_dt_probe(struct platform_device *ofdev)
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{
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struct resource *denali_reg, *nand_data;
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struct denali_dt *dt;
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struct denali_nand_info *denali;
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int ret;
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const struct of_device_id *of_id;
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of_id = of_match_device(denali_nand_dt_ids, &ofdev->dev);
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if (of_id) {
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ofdev->id_entry = of_id->data;
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} else {
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pr_err("Failed to find the right device id.\n");
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return -ENOMEM;
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}
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dt = devm_kzalloc(&ofdev->dev, sizeof(*dt), GFP_KERNEL);
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if (!dt)
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return -ENOMEM;
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denali = &dt->denali;
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denali->platform = DT;
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denali->dev = &ofdev->dev;
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denali->irq = platform_get_irq(ofdev, 0);
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if (denali->irq < 0) {
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dev_err(&ofdev->dev, "no irq defined\n");
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return denali->irq;
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}
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denali_reg = platform_get_resource_byname(ofdev, IORESOURCE_MEM, "denali_reg");
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denali->flash_reg = devm_ioremap_resource(&ofdev->dev, denali_reg);
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if (IS_ERR(denali->flash_reg))
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return PTR_ERR(denali->flash_reg);
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nand_data = platform_get_resource_byname(ofdev, IORESOURCE_MEM, "nand_data");
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denali->flash_mem = devm_ioremap_resource(&ofdev->dev, nand_data);
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if (IS_ERR(denali->flash_mem))
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return PTR_ERR(denali->flash_mem);
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if (!of_property_read_u32(ofdev->dev.of_node,
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"dma-mask", (u32 *)&denali_dma_mask)) {
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denali->dev->dma_mask = &denali_dma_mask;
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} else {
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denali->dev->dma_mask = NULL;
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}
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dt->clk = devm_clk_get(&ofdev->dev, NULL);
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if (IS_ERR(dt->clk)) {
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dev_err(&ofdev->dev, "no clk available\n");
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return PTR_ERR(dt->clk);
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}
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clk_prepare_enable(dt->clk);
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ret = denali_init(denali);
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if (ret)
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goto out_disable_clk;
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platform_set_drvdata(ofdev, dt);
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return 0;
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out_disable_clk:
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clk_disable_unprepare(dt->clk);
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return ret;
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}
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static int denali_dt_remove(struct platform_device *ofdev)
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{
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struct denali_dt *dt = platform_get_drvdata(ofdev);
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denali_remove(&dt->denali);
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clk_disable(dt->clk);
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return 0;
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}
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static struct platform_driver denali_dt_driver = {
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.probe = denali_dt_probe,
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.remove = denali_dt_remove,
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.driver = {
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.name = "denali-nand-dt",
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.of_match_table = denali_nand_dt_ids,
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},
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};
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module_platform_driver(denali_dt_driver);
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MODULE_LICENSE("GPL");
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MODULE_AUTHOR("Jamie Iles");
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MODULE_DESCRIPTION("DT driver for Denali NAND controller");
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