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/mmc/host.h>
  12
  13 struct mmc_pwrseq_ops {
  14         void (*pre_power_on)(struct mmc_host *host);
  15         void (*post_power_on)(struct mmc_host *host);
  16         void (*power_off)(struct mmc_host *host);
  17 };
  18
  19 struct mmc_pwrseq {
  20         const struct mmc_pwrseq_ops *ops;
  21         struct device *dev;
  22         struct list_head pwrseq_node;
  23         struct module *owner;
  24 };
  25
  26 #ifdef CONFIG_OF
  27
  28 int mmc_pwrseq_register(struct mmc_pwrseq *pwrseq);
  29 void mmc_pwrseq_unregister(struct mmc_pwrseq *pwrseq);
  30
  31 int mmc_pwrseq_alloc(struct mmc_host *host);
  32 void mmc_pwrseq_pre_power_on(struct mmc_host *host);
  33 void mmc_pwrseq_post_power_on(struct mmc_host *host);
  34 void mmc_pwrseq_power_off(struct mmc_host *host);
  35 void mmc_pwrseq_free(struct mmc_host *host);
  36
  37 #else
  38
  39 static inline int mmc_pwrseq_register(struct mmc_pwrseq *pwrseq)
  40 {
  41         return -ENOSYS;
  42 }
  43 static inline void mmc_pwrseq_unregister(struct mmc_pwrseq *pwrseq) {}
  44 static inline int mmc_pwrseq_alloc(struct mmc_host *host) { return 0; }
  45 static inline void mmc_pwrseq_pre_power_on(struct mmc_host *host) {}
  46 static inline void mmc_pwrseq_post_power_on(struct mmc_host *host) {}
  47 static inline void mmc_pwrseq_power_off(struct mmc_host *host) {}
  48 static inline void mmc_pwrseq_free(struct mmc_host *host) {}
  49
  50 #endif
  51
  52 #endif