xref: /openbmc/linux/drivers/mmc/core/pwrseq.h (revision 6c33a6f4)
1 /* SPDX-License-Identifier: GPL-2.0-only */
2 /*
3  * Copyright (C) 2014 Linaro Ltd
4  *
5  * Author: Ulf Hansson <ulf.hansson@linaro.org>
6  */
7 #ifndef _MMC_CORE_PWRSEQ_H
8 #define _MMC_CORE_PWRSEQ_H
9 
10 #include <linux/types.h>
11 
12 struct mmc_host;
13 struct device;
14 struct module;
15 
16 struct mmc_pwrseq_ops {
17 	void (*pre_power_on)(struct mmc_host *host);
18 	void (*post_power_on)(struct mmc_host *host);
19 	void (*power_off)(struct mmc_host *host);
20 	void (*reset)(struct mmc_host *host);
21 };
22 
23 struct mmc_pwrseq {
24 	const struct mmc_pwrseq_ops *ops;
25 	struct device *dev;
26 	struct list_head pwrseq_node;
27 	struct module *owner;
28 };
29 
30 #ifdef CONFIG_OF
31 
32 int mmc_pwrseq_register(struct mmc_pwrseq *pwrseq);
33 void mmc_pwrseq_unregister(struct mmc_pwrseq *pwrseq);
34 
35 int mmc_pwrseq_alloc(struct mmc_host *host);
36 void mmc_pwrseq_pre_power_on(struct mmc_host *host);
37 void mmc_pwrseq_post_power_on(struct mmc_host *host);
38 void mmc_pwrseq_power_off(struct mmc_host *host);
39 void mmc_pwrseq_reset(struct mmc_host *host);
40 void mmc_pwrseq_free(struct mmc_host *host);
41 
42 #else
43 
44 static inline int mmc_pwrseq_register(struct mmc_pwrseq *pwrseq)
45 {
46 	return -ENOSYS;
47 }
48 static inline void mmc_pwrseq_unregister(struct mmc_pwrseq *pwrseq) {}
49 static inline int mmc_pwrseq_alloc(struct mmc_host *host) { return 0; }
50 static inline void mmc_pwrseq_pre_power_on(struct mmc_host *host) {}
51 static inline void mmc_pwrseq_post_power_on(struct mmc_host *host) {}
52 static inline void mmc_pwrseq_power_off(struct mmc_host *host) {}
53 static inline void mmc_pwrseq_reset(struct mmc_host *host) {}
54 static inline void mmc_pwrseq_free(struct mmc_host *host) {}
55 
56 #endif
57 
58 #endif
59