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linux_kernel
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drivers
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mmc
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core
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pwrseq.h

pwrseq.h 1.4 KB
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  1. /*
    2. 

  2.  * Copyright (C) 2014 Linaro Ltd
    3. 

  3.  *
    4. 

  4.  * Author: Ulf Hansson <ulf.hansson@linaro.org>
    5. 

  5.  *
    6. 

  6.  * License terms: GNU General Public License (GPL) version 2
    7. 

  7.  */
    8. 

  8. #ifndef _MMC_CORE_PWRSEQ_H
    9. 

  9. #define _MMC_CORE_PWRSEQ_H
    10. 

  10. 

  11. #include <linux/mmc/host.h>
    12. 

  12. 

  13. struct mmc_pwrseq_ops {
    14. 

  14. 	void (*pre_power_on)(struct mmc_host *host);
    15. 

  15. 	void (*post_power_on)(struct mmc_host *host);
    16. 

  16. 	void (*power_off)(struct mmc_host *host);
    17. 

  17. };
    18. 

  18. 

  19. struct mmc_pwrseq {
    20. 

  20. 	const struct mmc_pwrseq_ops *ops;
    21. 

  21. 	struct device *dev;
    22. 

  22. 	struct list_head pwrseq_node;
    23. 

  23. 	struct module *owner;
    24. 

  24. };
    25. 

  25. 

  26. #ifdef CONFIG_OF
    27. 

  27. 

  28. int mmc_pwrseq_register(struct mmc_pwrseq *pwrseq);
    29. 

  29. void mmc_pwrseq_unregister(struct mmc_pwrseq *pwrseq);
    30. 

  30. 

  31. int mmc_pwrseq_alloc(struct mmc_host *host);
    32. 

  32. void mmc_pwrseq_pre_power_on(struct mmc_host *host);
    33. 

  33. void mmc_pwrseq_post_power_on(struct mmc_host *host);
    34. 

  34. void mmc_pwrseq_power_off(struct mmc_host *host);
    35. 

  35. void mmc_pwrseq_free(struct mmc_host *host);
    36. 

  36. 

  37. #else
    38. 

  38. 

  39. static inline int mmc_pwrseq_register(struct mmc_pwrseq *pwrseq)
    40. 

  40. {
    41. 

  41. 	return -ENOSYS;
    42. 

  42. }
    43. 

  43. static inline void mmc_pwrseq_unregister(struct mmc_pwrseq *pwrseq) {}
    44. 

  44. static inline int mmc_pwrseq_alloc(struct mmc_host *host) { return 0; }
    45. 

  45. static inline void mmc_pwrseq_pre_power_on(struct mmc_host *host) {}
    46. 

  46. static inline void mmc_pwrseq_post_power_on(struct mmc_host *host) {}
    47. 

  47. static inline void mmc_pwrseq_power_off(struct mmc_host *host) {}
    48. 

  48. static inline void mmc_pwrseq_free(struct mmc_host *host) {}
    49. 

  49. 

  50. #endif
    51. 

  51. 

  52. #endif
    53.