mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-10-31 08:28:13 +00:00
4d3ec936f8
Expand the control-bank accessors that were implemented using macros.
This allows the definitions of these exported functions to be found more
easily and specifically avoids a W=1 compiler warning due to the
redundant brightness sanity check:
drivers/mfd/lm3533-ctrlbank.c: In function 'lm3533_ctrlbank_set_brightness':
drivers/mfd/lm3533-ctrlbank.c:98:10: warning: comparison is always false due to limited range of data type [-Wtype-limits]
98 | if (val > LM3533_##_NAME##_MAX) \
| ^
drivers/mfd/lm3533-ctrlbank.c:125:1: note: in expansion of macro 'lm3533_ctrlbank_set'
125 | lm3533_ctrlbank_set(brightness, BRIGHTNESS);
| ^~~~~~~~~~~~~~~~~~~
Signed-off-by: Johan Hovold <johan@kernel.org>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
162 lines
3.6 KiB
C
162 lines
3.6 KiB
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_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);
|
|
|
|
int lm3533_ctrlbank_set_brightness(struct lm3533_ctrlbank *cb, u8 val)
|
|
{
|
|
u8 reg;
|
|
int ret;
|
|
|
|
reg = lm3533_ctrlbank_get_reg(cb, LM3533_REG_BRIGHTNESS_BASE);
|
|
ret = lm3533_write(cb->lm3533, reg, val);
|
|
if (ret)
|
|
dev_err(cb->dev, "failed to set brightness\n");
|
|
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL_GPL(lm3533_ctrlbank_set_brightness);
|
|
|
|
int lm3533_ctrlbank_get_brightness(struct lm3533_ctrlbank *cb, u8 *val)
|
|
{
|
|
u8 reg;
|
|
int ret;
|
|
|
|
reg = lm3533_ctrlbank_get_reg(cb, LM3533_REG_BRIGHTNESS_BASE);
|
|
ret = lm3533_read(cb->lm3533, reg, val);
|
|
if (ret)
|
|
dev_err(cb->dev, "failed to get brightness\n");
|
|
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL_GPL(lm3533_ctrlbank_get_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
|
|
*/
|
|
int lm3533_ctrlbank_set_pwm(struct lm3533_ctrlbank *cb, u8 val)
|
|
{
|
|
u8 reg;
|
|
int ret;
|
|
|
|
if (val > LM3533_PWM_MAX)
|
|
return -EINVAL;
|
|
|
|
reg = lm3533_ctrlbank_get_reg(cb, LM3533_REG_PWM_BASE);
|
|
ret = lm3533_write(cb->lm3533, reg, val);
|
|
if (ret)
|
|
dev_err(cb->dev, "failed to set PWM mask\n");
|
|
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL_GPL(lm3533_ctrlbank_set_pwm);
|
|
|
|
int lm3533_ctrlbank_get_pwm(struct lm3533_ctrlbank *cb, u8 *val)
|
|
{
|
|
u8 reg;
|
|
int ret;
|
|
|
|
reg = lm3533_ctrlbank_get_reg(cb, LM3533_REG_PWM_BASE);
|
|
ret = lm3533_read(cb->lm3533, reg, val);
|
|
if (ret)
|
|
dev_err(cb->dev, "failed to get PWM mask\n");
|
|
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL_GPL(lm3533_ctrlbank_get_pwm);
|
|
|
|
MODULE_AUTHOR("Johan Hovold <jhovold@gmail.com>");
|
|
MODULE_DESCRIPTION("LM3533 Control Bank interface");
|
|
MODULE_LICENSE("GPL");
|