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asm/arch-meson: add missing meson_sm_write_efuse signature

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This function can be used by other modules. Also add comments.

Signed-off-by: Alexey Romanov <avromanov@sberdevices.ru>
Reviewed-by: Neil Armstrong <neil.armstrong@linaro.org>
Reviewed-by: Mattijs Korpershoek <mkorpershoek@baylibre.com>
Link: https://lore.kernel.org/r/20230110105650.54580-2-avromanov@sberdevices.ru
Signed-off-by: Neil Armstrong <neil.armstrong@linaro.org>
This commit is contained in:
Alexey Romanov 2023-01-10 13:56:46 +03:00 • committed by Neil Armstrong
parent 559871524a
commit 12d7827349
1 changed files with 28 additions and 0 deletions
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28
arch/arm/include/asm/arch-meson/sm.h
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@ -6,10 +6,35 @@
#ifndef __MESON_SM_H__
#define __MESON_SM_H__
/**
* meson_sm_read_efuse - read efuse memory into buffer
*
* @offset: offset from the start efuse memory
* @buffer: pointer to buffer
* @size: number of bytes to read
* @return: number of bytes read
*/
ssize_t meson_sm_read_efuse(uintptr_t offset, void *buffer, size_t size);
/**
* meson_sm_write_efuse - write into efuse memory from buffer
*
* @offset: offset from the start efuse memory
* @buffer: pointer to buffer
* @size: number of bytes to write
* @return: number of bytes written
*/
ssize_t meson_sm_write_efuse(uintptr_t offset, void *buffer, size_t size);
#define SM_SERIAL_SIZE 12
/**
* meson_sm_get_serial - read chip unique id into buffer
*
* @buffer: pointer to buffer
* @size: buffer size.
* @return: zero on success or -errno on failure
*/
int meson_sm_get_serial(void *buffer, size_t size);
enum {
@ -28,6 +53,9 @@ enum {
REBOOT_REASON_WATCHDOG_REBOOT = 13,
};
/**
* meson_sm_get_reboot_reason - get reboot reason
*/
int meson_sm_get_reboot_reason(void);
#endif /* __MESON_SM_H__ */