6fa4b9d802
Use SI-units (uA) for max-current interface (5000 - 29800 uA). Signed-off-by: Johan Hovold <jhovold@gmail.com> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
148 lines
3.7 KiB
C
148 lines
3.7 KiB
C
/*
|
|
* lm3533-ctrlbank.c -- LM3533 Generic Control Bank interface
|
|
*
|
|
* Copyright (C) 2011-2012 Texas Instruments
|
|
*
|
|
* Author: Johan Hovold <jhovold@gmail.com>
|
|
*
|
|
* 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_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");
|