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1  /* SPDX-License-Identifier: GPL-2.0-or-later */
2  /* Copyright (C) 2018 ROHM Semiconductors */
3  
4  #ifndef __LINUX_MFD_ROHM_H__
5  #define __LINUX_MFD_ROHM_H__
6  
7  #include <linux/regmap.h>
8  #include <linux/regulator/driver.h>
9  
10  enum rohm_chip_type {
11  	ROHM_CHIP_TYPE_BD9571,
12  	ROHM_CHIP_TYPE_BD9573,
13  	ROHM_CHIP_TYPE_BD9574,
14  	ROHM_CHIP_TYPE_BD9576,
15  	ROHM_CHIP_TYPE_BD70528,
16  	ROHM_CHIP_TYPE_BD71815,
17  	ROHM_CHIP_TYPE_BD71828,
18  	ROHM_CHIP_TYPE_BD71837,
19  	ROHM_CHIP_TYPE_BD71847,
20  	ROHM_CHIP_TYPE_AMOUNT
21  };
22  
23  struct rohm_regmap_dev {
24  	struct device *dev;
25  	struct regmap *regmap;
26  };
27  
28  #define ROHM_DVS_LEVEL_RUN		BIT(0)
29  #define ROHM_DVS_LEVEL_IDLE		BIT(1)
30  #define ROHM_DVS_LEVEL_SUSPEND		BIT(2)
31  #define ROHM_DVS_LEVEL_LPSR		BIT(3)
32  #define ROHM_DVS_LEVEL_SNVS		BIT(4)
33  #define ROHM_DVS_LEVEL_VALID_AMOUNT	5
34  #define ROHM_DVS_LEVEL_UNKNOWN		0
35  
36  /**
37   * struct rohm_dvs_config - dynamic voltage scaling register descriptions
38   *
39   * @level_map:		bitmap representing supported run-levels for this
40   *			regulator
41   * @run_reg:		register address for regulator config at 'run' state
42   * @run_mask:		value mask for regulator voltages at 'run' state
43   * @run_on_mask:	enable mask for regulator at 'run' state
44   * @idle_reg:		register address for regulator config at 'idle' state
45   * @idle_mask:		value mask for regulator voltages at 'idle' state
46   * @idle_on_mask:	enable mask for regulator at 'idle' state
47   * @suspend_reg:	register address for regulator config at 'suspend' state
48   * @suspend_mask:	value mask for regulator voltages at 'suspend' state
49   * @suspend_on_mask:	enable mask for regulator at 'suspend' state
50   * @lpsr_reg:		register address for regulator config at 'lpsr' state
51   * @lpsr_mask:		value mask for regulator voltages at 'lpsr' state
52   * @lpsr_on_mask:	enable mask for regulator at 'lpsr' state
53   *
54   * Description of ROHM PMICs voltage configuration registers for different
55   * system states. This is used to correctly configure the PMIC at startup
56   * based on values read from DT.
57   */
58  struct rohm_dvs_config {
59  	uint64_t level_map;
60  	unsigned int run_reg;
61  	unsigned int run_mask;
62  	unsigned int run_on_mask;
63  	unsigned int idle_reg;
64  	unsigned int idle_mask;
65  	unsigned int idle_on_mask;
66  	unsigned int suspend_reg;
67  	unsigned int suspend_mask;
68  	unsigned int suspend_on_mask;
69  	unsigned int lpsr_reg;
70  	unsigned int lpsr_mask;
71  	unsigned int lpsr_on_mask;
72  	unsigned int snvs_reg;
73  	unsigned int snvs_mask;
74  	unsigned int snvs_on_mask;
75  };
76  
77  #if IS_ENABLED(CONFIG_REGULATOR_ROHM)
78  int rohm_regulator_set_dvs_levels(const struct rohm_dvs_config *dvs,
79  				  struct device_node *np,
80  				  const struct regulator_desc *desc,
81  				  struct regmap *regmap);
82  
83  #else
rohm_regulator_set_dvs_levels(const struct rohm_dvs_config * dvs,struct device_node * np,const struct regulator_desc * desc,struct regmap * regmap)84  static inline int rohm_regulator_set_dvs_levels(const struct rohm_dvs_config *dvs,
85  						struct device_node *np,
86  						const struct regulator_desc *desc,
87  						struct regmap *regmap)
88  {
89  	return 0;
90  }
91  #endif
92  
93  #endif
94