drivers/mmc/core/pwrseq.h

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