drivers/mmc/core/pwrseq.h

   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