asm/arch-meson: add missing meson_sm_write_efuse signature
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>
diff --git a/arch/arm/include/asm/arch-meson/sm.h b/arch/arm/include/asm/arch-meson/sm.h
index f3ae46a..53b7517 100644
--- a/arch/arm/include/asm/arch-meson/sm.h
+++ b/arch/arm/include/asm/arch-meson/sm.h
@@ -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 @@
REBOOT_REASON_WATCHDOG_REBOOT = 13,
};
+/**
+ * meson_sm_get_reboot_reason - get reboot reason
+ */
int meson_sm_get_reboot_reason(void);
#endif /* __MESON_SM_H__ */