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https://github.com/brain-hackers/u-boot-brain
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1d9654dc43
A patch for NAND uclass support was proposed about half a year ago: https://patchwork.ozlabs.org/patch/722282/ It was not merged and I do not see on-going work for this. Without DM-based probing, we need to set up pinctrl etc. in an ad-hoc way and give lots of crappy CONFIG options for base addresses and properties, which are supposed to be specified by DT. This is painful. This commit just provides a probe hook to retrieve "reg" from DT and allocate private data in a DM manner. This DT driver is not essentially a NAND driver, in fact it is (ab)using UCLASS_MISC. Once UCLASS_NAND is supported, it would be possible to migrate to it. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
69 lines
1.4 KiB
C
69 lines
1.4 KiB
C
/*
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* Copyright (C) 2017 Socionext Inc.
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* Author: Masahiro Yamada <yamada.masahiro@socionext.com>
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*
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* SPDX-License-Identifier: GPL-2.0+
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*/
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#include <common.h>
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#include <dm.h>
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#include <linux/io.h>
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#include <linux/ioport.h>
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#include "denali.h"
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static const struct udevice_id denali_nand_dt_ids[] = {
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{
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.compatible = "altr,socfpga-denali-nand",
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},
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{
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.compatible = "socionext,uniphier-denali-nand-v5a",
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},
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{
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.compatible = "socionext,uniphier-denali-nand-v5b",
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},
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{ /* sentinel */ }
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};
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static int denali_dt_probe(struct udevice *dev)
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{
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struct denali_nand_info *denali = dev_get_priv(dev);
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struct resource res;
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int ret;
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ret = dev_read_resource_byname(dev, "denali_reg", &res);
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if (ret)
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return ret;
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denali->flash_reg = devm_ioremap(dev, res.start, resource_size(&res));
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ret = dev_read_resource_byname(dev, "nand_data", &res);
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if (ret)
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return ret;
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denali->flash_mem = devm_ioremap(dev, res.start, resource_size(&res));
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return denali_init(denali);
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}
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U_BOOT_DRIVER(denali_nand_dt) = {
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.name = "denali-nand-dt",
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.id = UCLASS_MISC,
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.of_match = denali_nand_dt_ids,
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.probe = denali_dt_probe,
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.priv_auto_alloc_size = sizeof(struct denali_nand_info),
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};
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void board_nand_init(void)
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{
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struct udevice *dev;
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int ret;
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ret = uclass_get_device_by_driver(UCLASS_MISC,
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DM_GET_DRIVER(denali_nand_dt),
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&dev);
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if (ret && ret != -ENODEV)
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printf("Failed to initialize Denali NAND controller. (error %d)\n",
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ret);
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}
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