drivers/clk/qcom/gdsc.h

   1 /*
   2  * Copyright (c) 2015, The Linux Foundation. All rights reserved.
   3  *
   4  * This program is free software; you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License version 2 and
   6  * only version 2 as published by the Free Software Foundation.
   7  *
   8  * This program is distributed in the hope that it will be useful,
   9  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  11  * GNU General Public License for more details.
  12  */
  13
  14 #ifndef __QCOM_GDSC_H__
  15 #define __QCOM_GDSC_H__
  16
  17 #include <linux/err.h>
  18 #include <linux/pm_domain.h>
  19
  20 struct regmap;
  21 struct reset_controller_dev;
  22
  23 /* Powerdomain allowable state bitfields */
  24 #define PWRSTS_OFF              BIT(0)
  25 #define PWRSTS_RET              BIT(1)
  26 #define PWRSTS_ON               BIT(2)
  27 #define PWRSTS_OFF_ON           (PWRSTS_OFF | PWRSTS_ON)
  28 #define PWRSTS_RET_ON           (PWRSTS_RET | PWRSTS_ON)
  29
  30 /**
  31  * struct gdsc - Globally Distributed Switch Controller
  32  * @pd: generic power domain
  33  * @regmap: regmap for MMIO accesses
  34  * @gdscr: gsdc control register
  35  * @cxcs: offsets of branch registers to toggle mem/periph bits in
  36  * @cxc_count: number of @cxcs
  37  * @pwrsts: Possible powerdomain power states
  38  * @resets: ids of resets associated with this gdsc
  39  * @reset_count: number of @resets
  40  * @rcdev: reset controller
  41  */
  42 struct gdsc {
  43         struct generic_pm_domain        pd;
  44         struct regmap                   *regmap;
  45         unsigned int                    gdscr;
  46         unsigned int                    *cxcs;
  47         unsigned int                    cxc_count;
  48         const u8                        pwrsts;
  49         struct reset_controller_dev     *rcdev;
  50         unsigned int                    *resets;
  51         unsigned int                    reset_count;
  52 };
  53
  54 #ifdef CONFIG_QCOM_GDSC
  55 int gdsc_register(struct device *, struct gdsc **, size_t n,
  56                   struct reset_controller_dev *, struct regmap *);
  57 void gdsc_unregister(struct device *);
  58 #else
  59 static inline int gdsc_register(struct device *d, struct gdsc **g, size_t n,
  60                                 struct reset_controller_dev *rcdev,
  61                                 struct regmap *r)
  62 {
  63         return -ENOSYS;
  64 }
  65
  66 static inline void gdsc_unregister(struct device *d) {};
  67 #endif /* CONFIG_QCOM_GDSC */
  68 #endif /* __QCOM_GDSC_H__ */