forked from Minki/linux
945005409b
Fix up inconsistent usage of upper and lowercase letters in "Samsung" and "Exynos" names. "SAMSUNG" and "EXYNOS" are not abbreviations but regular trademarked names. Therefore they should be written with lowercase letters starting with capital letter. The lowercase "Exynos" name is promoted by its manufacturer Samsung Electronics Co., Ltd., in advertisement materials and on website. Although advertisement materials usually use uppercase "SAMSUNG", the lowercase version is used in all legal aspects (e.g. on Wikipedia and in privacy/legal statements on https://www.samsung.com/semiconductor/privacy-global/). Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>
114 lines
2.7 KiB
C
114 lines
2.7 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* Copyright (c) 2019 Samsung Electronics Co., Ltd.
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* http://www.samsung.com/
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*
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* Exynos - CHIP ID support
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* Author: Pankaj Dubey <pankaj.dubey@samsung.com>
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* Author: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
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*/
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#include <linux/io.h>
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#include <linux/mfd/syscon.h>
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#include <linux/of.h>
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#include <linux/regmap.h>
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#include <linux/slab.h>
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#include <linux/soc/samsung/exynos-chipid.h>
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#include <linux/sys_soc.h>
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static const struct exynos_soc_id {
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const char *name;
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unsigned int id;
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} soc_ids[] = {
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{ "EXYNOS3250", 0xE3472000 },
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{ "EXYNOS4210", 0x43200000 }, /* EVT0 revision */
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{ "EXYNOS4210", 0x43210000 },
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{ "EXYNOS4212", 0x43220000 },
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{ "EXYNOS4412", 0xE4412000 },
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{ "EXYNOS5250", 0x43520000 },
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{ "EXYNOS5260", 0xE5260000 },
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{ "EXYNOS5410", 0xE5410000 },
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{ "EXYNOS5420", 0xE5420000 },
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{ "EXYNOS5440", 0xE5440000 },
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{ "EXYNOS5800", 0xE5422000 },
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{ "EXYNOS7420", 0xE7420000 },
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{ "EXYNOS5433", 0xE5433000 },
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};
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static const char * __init product_id_to_soc_id(unsigned int product_id)
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{
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int i;
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for (i = 0; i < ARRAY_SIZE(soc_ids); i++)
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if ((product_id & EXYNOS_MASK) == soc_ids[i].id)
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return soc_ids[i].name;
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return NULL;
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}
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static int __init exynos_chipid_early_init(void)
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{
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struct soc_device_attribute *soc_dev_attr;
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struct soc_device *soc_dev;
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struct device_node *root;
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struct device_node *syscon;
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struct regmap *regmap;
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u32 product_id;
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u32 revision;
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int ret;
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syscon = of_find_compatible_node(NULL, NULL,
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"samsung,exynos4210-chipid");
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if (!syscon)
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return ENODEV;
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regmap = device_node_to_regmap(syscon);
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of_node_put(syscon);
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if (IS_ERR(regmap))
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return PTR_ERR(regmap);
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ret = regmap_read(regmap, EXYNOS_CHIPID_REG_PRO_ID, &product_id);
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if (ret < 0)
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return ret;
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revision = product_id & EXYNOS_REV_MASK;
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soc_dev_attr = kzalloc(sizeof(*soc_dev_attr), GFP_KERNEL);
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if (!soc_dev_attr)
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return -ENOMEM;
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soc_dev_attr->family = "Samsung Exynos";
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root = of_find_node_by_path("/");
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of_property_read_string(root, "model", &soc_dev_attr->machine);
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of_node_put(root);
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soc_dev_attr->revision = kasprintf(GFP_KERNEL, "%x", revision);
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soc_dev_attr->soc_id = product_id_to_soc_id(product_id);
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if (!soc_dev_attr->soc_id) {
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pr_err("Unknown SoC\n");
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ret = -ENODEV;
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goto err;
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}
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/* please note that the actual registration will be deferred */
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soc_dev = soc_device_register(soc_dev_attr);
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if (IS_ERR(soc_dev)) {
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ret = PTR_ERR(soc_dev);
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goto err;
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}
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/* it is too early to use dev_info() here (soc_dev is NULL) */
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pr_info("soc soc0: Exynos: CPU[%s] PRO_ID[0x%x] REV[0x%x] Detected\n",
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soc_dev_attr->soc_id, product_id, revision);
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return 0;
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err:
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kfree(soc_dev_attr->revision);
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kfree(soc_dev_attr);
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return ret;
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}
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early_initcall(exynos_chipid_early_init);
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