a56609c4c3
There are various customizable parameters, so several variants for this IP. A generic compatible like "denali,denali-nand-dt" is useless. Moreover, there are multiple things wrong with this string. (Refer to Rob's comment [1]) The "denali,denali-nand-dt" was added by Altera for the SOCFPGA port. Replace it with a more specific string "altr,socfpga-denali-nand". There are no users (in upstream) of the old compatible string. The Denali IP on SOCFPGA incorporates the hardware ECC fixup engine. So, this capability should be associated with the compatible. [1] https://lkml.org/lkml/2016/12/1/450 Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> Acked-by: Rob Herring <robh@kernel.org> Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
137 lines
3.3 KiB
C
137 lines
3.3 KiB
C
/*
|
|
* NAND Flash Controller Device Driver for DT
|
|
*
|
|
* Copyright © 2011, Picochip.
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify it
|
|
* under the terms and conditions of the GNU General Public License,
|
|
* version 2, as published by the Free Software Foundation.
|
|
*
|
|
* This program is distributed in the hope it will be useful, but WITHOUT
|
|
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
|
|
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
|
|
* more details.
|
|
*/
|
|
#include <linux/clk.h>
|
|
#include <linux/err.h>
|
|
#include <linux/io.h>
|
|
#include <linux/ioport.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/module.h>
|
|
#include <linux/platform_device.h>
|
|
#include <linux/of.h>
|
|
#include <linux/of_device.h>
|
|
|
|
#include "denali.h"
|
|
|
|
struct denali_dt {
|
|
struct denali_nand_info denali;
|
|
struct clk *clk;
|
|
};
|
|
|
|
struct denali_dt_data {
|
|
unsigned int caps;
|
|
};
|
|
|
|
static const struct denali_dt_data denali_socfpga_data = {
|
|
.caps = DENALI_CAP_HW_ECC_FIXUP,
|
|
};
|
|
|
|
static const struct of_device_id denali_nand_dt_ids[] = {
|
|
{
|
|
.compatible = "altr,socfpga-denali-nand",
|
|
.data = &denali_socfpga_data,
|
|
},
|
|
{ /* sentinel */ }
|
|
};
|
|
MODULE_DEVICE_TABLE(of, denali_nand_dt_ids);
|
|
|
|
static u64 denali_dma_mask;
|
|
|
|
static int denali_dt_probe(struct platform_device *ofdev)
|
|
{
|
|
struct resource *denali_reg, *nand_data;
|
|
struct denali_dt *dt;
|
|
const struct denali_dt_data *data;
|
|
struct denali_nand_info *denali;
|
|
int ret;
|
|
|
|
dt = devm_kzalloc(&ofdev->dev, sizeof(*dt), GFP_KERNEL);
|
|
if (!dt)
|
|
return -ENOMEM;
|
|
denali = &dt->denali;
|
|
|
|
data = of_device_get_match_data(&ofdev->dev);
|
|
if (data)
|
|
denali->caps = data->caps;
|
|
|
|
denali->platform = DT;
|
|
denali->dev = &ofdev->dev;
|
|
denali->irq = platform_get_irq(ofdev, 0);
|
|
if (denali->irq < 0) {
|
|
dev_err(&ofdev->dev, "no irq defined\n");
|
|
return denali->irq;
|
|
}
|
|
|
|
denali_reg = platform_get_resource_byname(ofdev, IORESOURCE_MEM, "denali_reg");
|
|
denali->flash_reg = devm_ioremap_resource(&ofdev->dev, denali_reg);
|
|
if (IS_ERR(denali->flash_reg))
|
|
return PTR_ERR(denali->flash_reg);
|
|
|
|
nand_data = platform_get_resource_byname(ofdev, IORESOURCE_MEM, "nand_data");
|
|
denali->flash_mem = devm_ioremap_resource(&ofdev->dev, nand_data);
|
|
if (IS_ERR(denali->flash_mem))
|
|
return PTR_ERR(denali->flash_mem);
|
|
|
|
if (!of_property_read_u32(ofdev->dev.of_node,
|
|
"dma-mask", (u32 *)&denali_dma_mask)) {
|
|
denali->dev->dma_mask = &denali_dma_mask;
|
|
} else {
|
|
denali->dev->dma_mask = NULL;
|
|
}
|
|
|
|
dt->clk = devm_clk_get(&ofdev->dev, NULL);
|
|
if (IS_ERR(dt->clk)) {
|
|
dev_err(&ofdev->dev, "no clk available\n");
|
|
return PTR_ERR(dt->clk);
|
|
}
|
|
clk_prepare_enable(dt->clk);
|
|
|
|
ret = denali_init(denali);
|
|
if (ret)
|
|
goto out_disable_clk;
|
|
|
|
platform_set_drvdata(ofdev, dt);
|
|
return 0;
|
|
|
|
out_disable_clk:
|
|
clk_disable_unprepare(dt->clk);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int denali_dt_remove(struct platform_device *ofdev)
|
|
{
|
|
struct denali_dt *dt = platform_get_drvdata(ofdev);
|
|
|
|
denali_remove(&dt->denali);
|
|
clk_disable_unprepare(dt->clk);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct platform_driver denali_dt_driver = {
|
|
.probe = denali_dt_probe,
|
|
.remove = denali_dt_remove,
|
|
.driver = {
|
|
.name = "denali-nand-dt",
|
|
.of_match_table = denali_nand_dt_ids,
|
|
},
|
|
};
|
|
|
|
module_platform_driver(denali_dt_driver);
|
|
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_AUTHOR("Jamie Iles");
|
|
MODULE_DESCRIPTION("DT driver for Denali NAND controller");
|