26e2fe4cab
[ Upstream commit 2cc3b37f5b6df8189d55d0e812d9658ce256dfec ]
Binding for fixed NVMEM cells defined directly as NVMEM device subnodes
has been deprecated. It has been replaced by the "fixed-layout" NVMEM
layout binding.
New syntax is meant to be clearer and should help avoiding imprecise
bindings.
NVMEM subsystem already supports the new binding. It should be a good
idea to limit support for old syntax to existing drivers that actually
support & use it (we can't break backward compatibility!). That way we
additionally encourage new bindings & drivers to ignore deprecated
binding.
It wasn't clear (to me) if rtc and w1 code actually uses old syntax
fixed cells. I enabled them to don't risk any breakage.
Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
[for meson-{efuse,mx-efuse}.c]
Acked-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
[for mtk-efuse.c, nvmem/core.c, nvmem-provider.h]
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
[MT8192, MT8195 Chromebooks]
Tested-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
[for microchip-otpc.c]
Reviewed-by: Claudiu Beznea <claudiu.beznea@microchip.com>
[SAMA7G5-EK]
Tested-by: Claudiu Beznea <claudiu.beznea@microchip.com>
Acked-by: Jernej Skrabec <jernej.skrabec@gmail.com>
Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Link: https://lore.kernel.org/r/20231020105545.216052-3-srinivas.kandagatla@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Stable-dep-of: d2d73a6dd173 ("mtd: limit OTP NVMEM cell parse to non-NAND devices")
Signed-off-by: Sasha Levin <sashal@kernel.org>
79 lines
1.9 KiB
C
79 lines
1.9 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* UniPhier eFuse driver
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*
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* Copyright (C) 2017 Socionext Inc.
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*/
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#include <linux/device.h>
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#include <linux/io.h>
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#include <linux/module.h>
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#include <linux/mod_devicetable.h>
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#include <linux/nvmem-provider.h>
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#include <linux/platform_device.h>
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struct uniphier_efuse_priv {
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void __iomem *base;
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};
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static int uniphier_reg_read(void *context,
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unsigned int reg, void *_val, size_t bytes)
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{
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struct uniphier_efuse_priv *priv = context;
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u8 *val = _val;
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int offs;
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for (offs = 0; offs < bytes; offs += sizeof(u8))
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*val++ = readb(priv->base + reg + offs);
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return 0;
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}
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static int uniphier_efuse_probe(struct platform_device *pdev)
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{
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struct device *dev = &pdev->dev;
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struct resource *res;
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struct nvmem_device *nvmem;
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struct nvmem_config econfig = {};
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struct uniphier_efuse_priv *priv;
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priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
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if (!priv)
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return -ENOMEM;
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priv->base = devm_platform_get_and_ioremap_resource(pdev, 0, &res);
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if (IS_ERR(priv->base))
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return PTR_ERR(priv->base);
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econfig.stride = 1;
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econfig.word_size = 1;
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econfig.read_only = true;
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econfig.reg_read = uniphier_reg_read;
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econfig.size = resource_size(res);
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econfig.priv = priv;
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econfig.dev = dev;
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econfig.add_legacy_fixed_of_cells = true;
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nvmem = devm_nvmem_register(dev, &econfig);
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return PTR_ERR_OR_ZERO(nvmem);
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}
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static const struct of_device_id uniphier_efuse_of_match[] = {
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{ .compatible = "socionext,uniphier-efuse",},
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{/* sentinel */},
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};
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MODULE_DEVICE_TABLE(of, uniphier_efuse_of_match);
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static struct platform_driver uniphier_efuse_driver = {
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.probe = uniphier_efuse_probe,
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.driver = {
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.name = "uniphier-efuse",
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.of_match_table = uniphier_efuse_of_match,
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},
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};
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module_platform_driver(uniphier_efuse_driver);
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MODULE_AUTHOR("Keiji Hayashibara <hayashibara.keiji@socionext.com>");
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MODULE_DESCRIPTION("UniPhier eFuse driver");
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MODULE_LICENSE("GPL v2");
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