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1// SPDX-License-Identifier: GPL-2.02/*3 * Copyright (C) 2021 Broadcom. All Rights Reserved. The term4 * “Broadcom” refers to Broadcom Inc. and/or its subsidiaries.5 */6 7/*8 * Generic state machine framework.9 */10#include "efc.h"11#include "efc_sm.h"12 13/**14 * efc_sm_post_event() - Post an event to a context.15 *16 * @ctx: State machine context17 * @evt: Event to post18 * @data: Event-specific data (if any)19 */20int21efc_sm_post_event(struct efc_sm_ctx *ctx,22 enum efc_sm_event evt, void *data)23{24 if (!ctx->current_state)25 return -EIO;26 27 ctx->current_state(ctx, evt, data);28 return 0;29}30 31void32efc_sm_transition(struct efc_sm_ctx *ctx,33 void (*state)(struct efc_sm_ctx *,34 enum efc_sm_event, void *), void *data)35 36{37 if (ctx->current_state == state) {38 efc_sm_post_event(ctx, EFC_EVT_REENTER, data);39 } else {40 efc_sm_post_event(ctx, EFC_EVT_EXIT, data);41 ctx->current_state = state;42 efc_sm_post_event(ctx, EFC_EVT_ENTER, data);43 }44}45 46static char *event_name[] = EFC_SM_EVENT_NAME;47 48const char *efc_sm_event_name(enum efc_sm_event evt)49{50 if (evt > EFC_EVT_LAST)51 return "unknown";52 53 return event_name[evt];54}55