[linux.git] / drivers / mfd / lm3533-ctrlbank.c

/*
 * lm3533-ctrlbank.c -- LM3533 Generic Control Bank interface
 *
 * Copyright (C) 2011-2012 Texas Instruments
 *
 * Author: Johan Hovold <[email protected]>
 *
 * This program is free software; you can redistribute it and/or modify it
 * under  the terms of the GNU General  Public License as published by the
 * Free Software Foundation;  either version 2 of the License, or (at your
 * option) any later version.
 */

#include <linux/device.h>
#include <linux/module.h>

#include <linux/mfd/lm3533.h>


#define LM3533_BRIGHTNESS_MAX		255
#define LM3533_MAX_CURRENT_MAX		31
#define LM3533_PWM_MAX			0x3f

#define LM3533_REG_PWM_BASE		0x14
#define LM3533_REG_MAX_CURRENT_BASE	0x1f
#define LM3533_REG_CTRLBANK_ENABLE	0x27
#define LM3533_REG_BRIGHTNESS_BASE	0x40


static inline u8 lm3533_ctrlbank_get_reg(struct lm3533_ctrlbank *cb, u8 base)
{
	return base + cb->id;
}

int lm3533_ctrlbank_enable(struct lm3533_ctrlbank *cb)
{
	u8 mask;
	int ret;

	dev_dbg(cb->dev, "%s - %d\n", __func__, cb->id);

	mask = 1 << cb->id;
	ret = lm3533_update(cb->lm3533, LM3533_REG_CTRLBANK_ENABLE,
								mask, mask);
	if (ret)
		dev_err(cb->dev, "failed to enable ctrlbank %d\n", cb->id);

	return ret;
}
EXPORT_SYMBOL_GPL(lm3533_ctrlbank_enable);

int lm3533_ctrlbank_disable(struct lm3533_ctrlbank *cb)
{
	u8 mask;
	int ret;

	dev_dbg(cb->dev, "%s - %d\n", __func__, cb->id);

	mask = 1 << cb->id;
	ret = lm3533_update(cb->lm3533, LM3533_REG_CTRLBANK_ENABLE, 0, mask);
	if (ret)
		dev_err(cb->dev, "failed to disable ctrlbank %d\n", cb->id);

	return ret;
}
EXPORT_SYMBOL_GPL(lm3533_ctrlbank_disable);

#define lm3533_ctrlbank_set(_name, _NAME)				\
int lm3533_ctrlbank_set_##_name(struct lm3533_ctrlbank *cb, u8 val)	\
{									\
	u8 reg;								\
	int ret;							\
									\
	if (val > LM3533_##_NAME##_MAX)					\
		return -EINVAL;						\
									\
	reg = lm3533_ctrlbank_get_reg(cb, LM3533_REG_##_NAME##_BASE);	\
	ret = lm3533_write(cb->lm3533, reg, val);			\
	if (ret)							\
		dev_err(cb->dev, "failed to set " #_name "\n");		\
									\
	return ret;							\
}									\
EXPORT_SYMBOL_GPL(lm3533_ctrlbank_set_##_name);

#define lm3533_ctrlbank_get(_name, _NAME)				\
int lm3533_ctrlbank_get_##_name(struct lm3533_ctrlbank *cb, u8 *val)	\
{									\
	u8 reg;								\
	int ret;							\
									\
	reg = lm3533_ctrlbank_get_reg(cb, LM3533_REG_##_NAME##_BASE);	\
	ret = lm3533_read(cb->lm3533, reg, val);			\
	if (ret)							\
		dev_err(cb->dev, "failed to get " #_name "\n");		\
									\
	return ret;							\
}									\
EXPORT_SYMBOL_GPL(lm3533_ctrlbank_get_##_name);

lm3533_ctrlbank_set(brightness, BRIGHTNESS);
lm3533_ctrlbank_get(brightness, BRIGHTNESS);

/*
 * Full scale current.
 *
 * Imax = 5 + val * 0.8 mA, e.g.:
 *
 *    0 - 5 mA
 *     ...
 *   19 - 20.2 mA (default)
 *     ...
 *   31 - 29.8 mA
 */
lm3533_ctrlbank_set(max_current, MAX_CURRENT);
lm3533_ctrlbank_get(max_current, MAX_CURRENT);

/*
 * PWM-input control mask:
 *
 *   bit 5 - PWM-input enabled in Zone 4
 *   bit 4 - PWM-input enabled in Zone 3
 *   bit 3 - PWM-input enabled in Zone 2
 *   bit 2 - PWM-input enabled in Zone 1
 *   bit 1 - PWM-input enabled in Zone 0
 *   bit 0 - PWM-input enabled
 */
lm3533_ctrlbank_set(pwm, PWM);
lm3533_ctrlbank_get(pwm, PWM);


MODULE_AUTHOR("Johan Hovold <[email protected]>");
MODULE_DESCRIPTION("LM3533 Control Bank interface");
MODULE_LICENSE("GPL");
Commit	Line	Data
16c5c023 JH	1	/*
	2	* lm3533-ctrlbank.c -- LM3533 Generic Control Bank interface
	3	*
	4	* Copyright (C) 2011-2012 Texas Instruments
	5	*
	6	* Author: Johan Hovold <[email protected]>
	7	*
	8	* This program is free software; you can redistribute it and/or modify it
	9	* under the terms of the GNU General Public License as published by the
	10	* Free Software Foundation; either version 2 of the License, or (at your
	11	* option) any later version.
	12	*/
	13
	14	#include <linux/device.h>
	15	#include <linux/module.h>
	16
	17	#include <linux/mfd/lm3533.h>
	18
	19
	20	#define LM3533_BRIGHTNESS_MAX 255
	21	#define LM3533_MAX_CURRENT_MAX 31
	22	#define LM3533_PWM_MAX 0x3f
	23
	24	#define LM3533_REG_PWM_BASE 0x14
	25	#define LM3533_REG_MAX_CURRENT_BASE 0x1f
	26	#define LM3533_REG_CTRLBANK_ENABLE 0x27
	27	#define LM3533_REG_BRIGHTNESS_BASE 0x40
	28
	29
	30	static inline u8 lm3533_ctrlbank_get_reg(struct lm3533_ctrlbank *cb, u8 base)
	31	{
	32	return base + cb->id;
	33	}
	34
	35	int lm3533_ctrlbank_enable(struct lm3533_ctrlbank *cb)
	36	{
	37	u8 mask;
	38	int ret;
	39
	40	dev_dbg(cb->dev, "%s - %d\n", __func__, cb->id);
	41
	42	mask = 1 << cb->id;
	43	ret = lm3533_update(cb->lm3533, LM3533_REG_CTRLBANK_ENABLE,
	44	mask, mask);
	45	if (ret)
	46	dev_err(cb->dev, "failed to enable ctrlbank %d\n", cb->id);
	47
	48	return ret;
	49	}
	50	EXPORT_SYMBOL_GPL(lm3533_ctrlbank_enable);
	51
	52	int lm3533_ctrlbank_disable(struct lm3533_ctrlbank *cb)
	53	{
	54	u8 mask;
	55	int ret;
	56
	57	dev_dbg(cb->dev, "%s - %d\n", __func__, cb->id);
	58
	59	mask = 1 << cb->id;
	60	ret = lm3533_update(cb->lm3533, LM3533_REG_CTRLBANK_ENABLE, 0, mask);
	61	if (ret)
	62	dev_err(cb->dev, "failed to disable ctrlbank %d\n", cb->id);
	63
	64	return ret;
65	}
66	EXPORT_SYMBOL_GPL(lm3533_ctrlbank_disable);
67
68	#define lm3533_ctrlbank_set(_name, _NAME) \
69	int lm3533_ctrlbank_set_##_name(struct lm3533_ctrlbank *cb, u8 val) \
70	{ \
71	u8 reg; \
72	int ret; \
73	\
74	if (val > LM3533_##_NAME##_MAX) \
75	return -EINVAL; \
76	\
77	reg = lm3533_ctrlbank_get_reg(cb, LM3533_REG_##_NAME##_BASE); \
78	ret = lm3533_write(cb->lm3533, reg, val); \
79	if (ret) \
80	dev_err(cb->dev, "failed to set " #_name "\n"); \
81	\
82	return ret; \
83	} \
84	EXPORT_SYMBOL_GPL(lm3533_ctrlbank_set_##_name);
85
86	#define lm3533_ctrlbank_get(_name, _NAME) \
87	int lm3533_ctrlbank_get_##_name(struct lm3533_ctrlbank cb, u8 val) \
88	{ \
89	u8 reg; \
90	int ret; \
91	\
92	reg = lm3533_ctrlbank_get_reg(cb, LM3533_REG_##_NAME##_BASE); \
93	ret = lm3533_read(cb->lm3533, reg, val); \
94	if (ret) \
95	dev_err(cb->dev, "failed to get " #_name "\n"); \
96	\
97	return ret; \
98	} \
99	EXPORT_SYMBOL_GPL(lm3533_ctrlbank_get_##_name);
100
101	lm3533_ctrlbank_set(brightness, BRIGHTNESS);
102	lm3533_ctrlbank_get(brightness, BRIGHTNESS);
103
104	/*
105	* Full scale current.
106	*
107	* Imax = 5 + val * 0.8 mA, e.g.:
108	*
109	* 0 - 5 mA
110	* ...
111	* 19 - 20.2 mA (default)
112	* ...
113	* 31 - 29.8 mA
114	*/
115	lm3533_ctrlbank_set(max_current, MAX_CURRENT);
116	lm3533_ctrlbank_get(max_current, MAX_CURRENT);
117
118	/*
119	* PWM-input control mask:
120	*
121	* bit 5 - PWM-input enabled in Zone 4
122	* bit 4 - PWM-input enabled in Zone 3
123	* bit 3 - PWM-input enabled in Zone 2
124	* bit 2 - PWM-input enabled in Zone 1
125	* bit 1 - PWM-input enabled in Zone 0
126	* bit 0 - PWM-input enabled
127	*/
128	lm3533_ctrlbank_set(pwm, PWM);
129	lm3533_ctrlbank_get(pwm, PWM);
130
131
132	MODULE_AUTHOR("Johan Hovold <[email protected]>");
133	MODULE_DESCRIPTION("LM3533 Control Bank interface");
134	MODULE_LICENSE("GPL");