[linux-2.6-block.git] / drivers / mfd / lm3533-ctrlbank.c

// SPDX-License-Identifier: GPL-2.0-or-later
/*
 * lm3533-ctrlbank.c -- LM3533 Generic Control Bank interface
 *
 * Copyright (C) 2011-2012 Texas Instruments
 *
 * Author: Johan Hovold <jhovold@gmail.com>
 */

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

#include <linux/mfd/lm3533.h>


#define LM3533_MAX_CURRENT_MIN		5000
#define LM3533_MAX_CURRENT_MAX		29800
#define LM3533_MAX_CURRENT_STEP		800

#define LM3533_BRIGHTNESS_MAX		255
#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);

/*
 * Full-scale current.
 *
 * imax		5000 - 29800 uA (800 uA step)
 */
int lm3533_ctrlbank_set_max_current(struct lm3533_ctrlbank *cb, u16 imax)
{
	u8 reg;
	u8 val;
	int ret;

	if (imax < LM3533_MAX_CURRENT_MIN || imax > LM3533_MAX_CURRENT_MAX)
		return -EINVAL;

	val = (imax - LM3533_MAX_CURRENT_MIN) / LM3533_MAX_CURRENT_STEP;

	reg = lm3533_ctrlbank_get_reg(cb, LM3533_REG_MAX_CURRENT_BASE);
	ret = lm3533_write(cb->lm3533, reg, val);
	if (ret)
		dev_err(cb->dev, "failed to set max current\n");

	return ret;
}
EXPORT_SYMBOL_GPL(lm3533_ctrlbank_set_max_current);

#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);

/*
 * 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 <jhovold@gmail.com>");
MODULE_DESCRIPTION("LM3533 Control Bank interface");
MODULE_LICENSE("GPL");
Commit	Line	Data
2874c5fd	1	// SPDX-License-Identifier: GPL-2.0-or-later
16c5c023 JH	2	/*
	3	* lm3533-ctrlbank.c -- LM3533 Generic Control Bank interface
	4	*
	5	* Copyright (C) 2011-2012 Texas Instruments
	6	*
	7	* Author: Johan Hovold <jhovold@gmail.com>
16c5c023 JH	8	*/
	9
	10	#include <linux/device.h>
	11	#include <linux/module.h>
	12
	13	#include <linux/mfd/lm3533.h>
	14
	15
6fa4b9d8 JH	16	#define LM3533_MAX_CURRENT_MIN 5000
	17	#define LM3533_MAX_CURRENT_MAX 29800
	18	#define LM3533_MAX_CURRENT_STEP 800
	19
16c5c023	20	#define LM3533_BRIGHTNESS_MAX 255
16c5c023 JH	21	#define LM3533_PWM_MAX 0x3f
	22
	23	#define LM3533_REG_PWM_BASE 0x14
	24	#define LM3533_REG_MAX_CURRENT_BASE 0x1f
	25	#define LM3533_REG_CTRLBANK_ENABLE 0x27
	26	#define LM3533_REG_BRIGHTNESS_BASE 0x40
	27
	28
	29	static inline u8 lm3533_ctrlbank_get_reg(struct lm3533_ctrlbank *cb, u8 base)
	30	{
	31	return base + cb->id;
	32	}
	33
	34	int lm3533_ctrlbank_enable(struct lm3533_ctrlbank *cb)
	35	{
	36	u8 mask;
	37	int ret;
	38
	39	dev_dbg(cb->dev, "%s - %d\n", __func__, cb->id);
	40
	41	mask = 1 << cb->id;
	42	ret = lm3533_update(cb->lm3533, LM3533_REG_CTRLBANK_ENABLE,
	43	mask, mask);
	44	if (ret)
	45	dev_err(cb->dev, "failed to enable ctrlbank %d\n", cb->id);
	46
	47	return ret;
	48	}
	49	EXPORT_SYMBOL_GPL(lm3533_ctrlbank_enable);
	50
	51	int lm3533_ctrlbank_disable(struct lm3533_ctrlbank *cb)
	52	{
	53	u8 mask;
	54	int ret;
	55
	56	dev_dbg(cb->dev, "%s - %d\n", __func__, cb->id);
	57
	58	mask = 1 << cb->id;
	59	ret = lm3533_update(cb->lm3533, LM3533_REG_CTRLBANK_ENABLE, 0, mask);
	60	if (ret)
	61	dev_err(cb->dev, "failed to disable ctrlbank %d\n", cb->id);
	62
	63	return ret;
	64	}
	65	EXPORT_SYMBOL_GPL(lm3533_ctrlbank_disable);
	66
6fa4b9d8 JH	67	/*
	68	* Full-scale current.
	69	*
	70	* imax 5000 - 29800 uA (800 uA step)
	71	*/
	72	int lm3533_ctrlbank_set_max_current(struct lm3533_ctrlbank *cb, u16 imax)
	73	{
	74	u8 reg;
	75	u8 val;
	76	int ret;
	77
	78	if (imax < LM3533_MAX_CURRENT_MIN \|\| imax > LM3533_MAX_CURRENT_MAX)
	79	return -EINVAL;
	80
	81	val = (imax - LM3533_MAX_CURRENT_MIN) / LM3533_MAX_CURRENT_STEP;
	82
	83	reg = lm3533_ctrlbank_get_reg(cb, LM3533_REG_MAX_CURRENT_BASE);
	84	ret = lm3533_write(cb->lm3533, reg, val);
	85	if (ret)
	86	dev_err(cb->dev, "failed to set max current\n");
	87
	88	return ret;
	89	}
	90	EXPORT_SYMBOL_GPL(lm3533_ctrlbank_set_max_current);
	91
16c5c023 JH	92	#define lm3533_ctrlbank_set(_name, _NAME) \
	93	int lm3533_ctrlbank_set_##_name(struct lm3533_ctrlbank *cb, u8 val) \
	94	{ \
	95	u8 reg; \
	96	int ret; \
	97	\
	98	if (val > LM3533_##_NAME##_MAX) \
	99	return -EINVAL; \
	100	\
	101	reg = lm3533_ctrlbank_get_reg(cb, LM3533_REG_##_NAME##_BASE); \
	102	ret = lm3533_write(cb->lm3533, reg, val); \
	103	if (ret) \
	104	dev_err(cb->dev, "failed to set " #_name "\n"); \
	105	\
	106	return ret; \
	107	} \
	108	EXPORT_SYMBOL_GPL(lm3533_ctrlbank_set_##_name);
	109
	110	#define lm3533_ctrlbank_get(_name, _NAME) \
	111	int lm3533_ctrlbank_get_##_name(struct lm3533_ctrlbank cb, u8 val) \
	112	{ \
	113	u8 reg; \
	114	int ret; \
	115	\
	116	reg = lm3533_ctrlbank_get_reg(cb, LM3533_REG_##_NAME##_BASE); \
	117	ret = lm3533_read(cb->lm3533, reg, val); \
	118	if (ret) \
	119	dev_err(cb->dev, "failed to get " #_name "\n"); \
	120	\
	121	return ret; \
	122	} \
	123	EXPORT_SYMBOL_GPL(lm3533_ctrlbank_get_##_name);
	124
	125	lm3533_ctrlbank_set(brightness, BRIGHTNESS);
	126	lm3533_ctrlbank_get(brightness, BRIGHTNESS);
	127
16c5c023 JH	128	/*
	129	* PWM-input control mask:
	130	*
	131	* bit 5 - PWM-input enabled in Zone 4
	132	* bit 4 - PWM-input enabled in Zone 3
	133	* bit 3 - PWM-input enabled in Zone 2
	134	* bit 2 - PWM-input enabled in Zone 1
	135	* bit 1 - PWM-input enabled in Zone 0
	136	* bit 0 - PWM-input enabled
	137	*/
	138	lm3533_ctrlbank_set(pwm, PWM);
	139	lm3533_ctrlbank_get(pwm, PWM);
	140
	141
	142	MODULE_AUTHOR("Johan Hovold <jhovold@gmail.com>");
	143	MODULE_DESCRIPTION("LM3533 Control Bank interface");
	144	MODULE_LICENSE("GPL");