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dedea0d18d
Patch introduces: * chip_id API - useful for various things, but used now for device_id (did) generation as mentioned in [1] on our private board code. Our device_id is calculated by means of permutations of chip_id value. * new SoCs (a1, s4, etc) are usually coming with the support of chip_id v2 right away, whereas secure monitors on old SoCs (like axg, g12b, g12a, etc) may support only chip_id v1. Chip_id API handles both cases * meson_sm_get_serial() is described via chip_id API. Links: [1] https://lore.kernel.org/linux-arm-kernel/202311242104.RjBPI3uI-lkp@intel.com/T/#m630fbeea6a6e7d531290b5c0af205af4fb979757 Signed-off-by: Viacheslav Bocharov <adeep@lexina.in> Co-developed-by: Arseniy Krasnov <avkrasnov@salutedevices.com> Signed-off-by: Arseniy Krasnov <avkrasnov@salutedevices.com> Signed-off-by: Evgeny Bachinin <EABachinin@salutedevices.com> Link: https://lore.kernel.org/r/20250210-meson_chip_id_all_vers-v1-3-b98f8b6880b8@salutedevices.com Signed-off-by: Neil Armstrong <neil.armstrong@linaro.org>
39 lines
1.0 KiB
C
39 lines
1.0 KiB
C
/* SPDX-License-Identifier: GPL-2.0+ */
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/*
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* Copyright (C) 2016 BayLibre, SAS
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* Author: Neil Armstrong <narmstrong@baylibre.com>
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*/
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#ifndef __MESON_BOOT_H__
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#define __MESON_BOOT_H__
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#include <linux/types.h>
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/* Boot device */
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#define BOOT_DEVICE_RESERVED 0
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#define BOOT_DEVICE_EMMC 1
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#define BOOT_DEVICE_NAND 2
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#define BOOT_DEVICE_SPI 3
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#define BOOT_DEVICE_SD 4
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#define BOOT_DEVICE_USB 5
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int meson_get_boot_device(void);
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int meson_get_soc_rev(char *buff, size_t buff_len);
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/**
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* meson_get_socinfo - retrieve cpu_id of the Amlogic SoC
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*
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* The value in the following format is read from register:
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* +-----------+------------+------------+------------+
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* | family_id | package_id | chip_rev | layout_rev |
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* +-----------+------------+------------+------------+
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* | 31 24 | 23 16 | 15 8 | 7 0 |
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* +-----------+------------+------------+------------+
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*
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* Return: 4 bytes value of cpu_id on success or 0 on failure.
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*/
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u32 meson_get_socinfo(void);
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#endif /* __MESON_BOOT_H__ */
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