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Commit 16c5c023 authored by Johan Hovold's avatar Johan Hovold Committed by Samuel Ortiz
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mfd: Add LM3533 lighting-power core driver 

Add support for National Semiconductor / TI LM3533 lighting power chips.

This is the core driver which provides register access over I2C and
registers the ambient-light-sensor, LED and backlight sub-drivers.
Signed-off-by: default avatarJohan Hovold <jhovold@gmail.com>
Reviewed-by: default avatarMark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: default avatarSamuel Ortiz <sameo@linux.intel.com>
parent ae840635
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Documentation/ABI/testing/sysfs-bus-i2c-devices-lm3533 0 → 100644
View file @ 16c5c023
What: /sys/bus/i2c/devices/.../boost_freq
Date: April 2012
KernelVersion: 3.5
Contact: Johan Hovold <jhovold@gmail.com>
Description:
Set the boost converter switching frequency (0, 1), where
0 - 500Hz
1 - 1000Hz
What: /sys/bus/i2c/devices/.../boost_ovp
Date: April 2012
KernelVersion: 3.5
Contact: Johan Hovold <jhovold@gmail.com>
Description:
Set the boost converter over-voltage protection threshold
(0..3), where
0 - 16V
1 - 24V
2 - 32V
3 - 40V
What: /sys/bus/i2c/devices/.../output_hvled[n]
Date: April 2012
KernelVersion: 3.5
Contact: Johan Hovold <jhovold@gmail.com>
Description:
Set the controlling backlight device for high-voltage current
sink HVLED[n] (n = 1, 2) (0, 1).
What: /sys/bus/i2c/devices/.../output_lvled[n]
Date: April 2012
KernelVersion: 3.5
Contact: Johan Hovold <jhovold@gmail.com>
Description:
Set the controlling led device for low-voltage current sink
LVLED[n] (n = 1..5) (0..3).
drivers/mfd/Kconfig
View file @ 16c5c023
......@@ -106,6 +106,19 @@ config UCB1400_CORE
To compile this driver as a module, choose M here: the
module will be called ucb1400_core.
config MFD_LM3533
tristate "LM3533 Lighting Power chip"
depends on I2C
select MFD_CORE
select REGMAP_I2C
help
Say yes here to enable support for National Semiconductor / TI
LM3533 Lighting Power chips.
This driver provides common support for accessing the device;
additional drivers must be enabled in order to use the LED,
backlight or ambient-light-sensor functionality of the device.
config TPS6105X
tristate "TPS61050/61052 Boost Converters"
depends on I2C
......
drivers/mfd/Makefile
View file @ 16c5c023
......@@ -120,3 +120,4 @@ obj-$(CONFIG_MFD_INTEL_MSIC) += intel_msic.o
obj-$(CONFIG_MFD_RC5T583) += rc5t583.o rc5t583-irq.o
obj-$(CONFIG_MFD_S5M_CORE) += s5m-core.o s5m-irq.o
obj-$(CONFIG_MFD_ANATOP) += anatop-mfd.o
obj-$(CONFIG_MFD_LM3533) += lm3533-core.o lm3533-ctrlbank.o
drivers/mfd/lm3533-core.c 0 → 100644
View file @ 16c5c023
This diff is collapsed.
drivers/mfd/lm3533-ctrlbank.c 0 → 100644
View file @ 16c5c023
/*
* 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_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 <jhovold@gmail.com>");
MODULE_DESCRIPTION("LM3533 Control Bank interface");
MODULE_LICENSE("GPL");
include/linux/mfd/lm3533.h 0 → 100644
View file @ 16c5c023
/*
* lm3533.h -- LM3533 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.
*/
#ifndef __LINUX_MFD_LM3533_H
#define __LINUX_MFD_LM3533_H
#define LM3533_ATTR_RO(_name) \
DEVICE_ATTR(_name, S_IRUGO, show_##_name, NULL)
#define LM3533_ATTR_RW(_name) \
DEVICE_ATTR(_name, S_IRUGO | S_IWUSR , show_##_name, store_##_name)
struct device;
struct regmap;
struct lm3533 {
struct device *dev;
struct regmap *regmap;
int gpio_hwen;
int irq;
unsigned have_als:1;
unsigned have_backlights:1;
unsigned have_leds:1;
};
struct lm3533_ctrlbank {
struct lm3533 *lm3533;
struct device *dev;
int id;
};
struct lm3533_als_platform_data {
unsigned pwm_mode:1; /* PWM input mode (default analog) */
};
struct lm3533_bl_platform_data {
char *name;
u8 default_brightness; /* 0 - 255 */
u8 max_current; /* 0 - 31 */
u8 pwm; /* 0 - 0x3f */
};
struct lm3533_led_platform_data {
char *name;
const char *default_trigger;
u8 max_current; /* 0 - 31 */
u8 pwm; /* 0 - 0x3f */
};
struct lm3533_platform_data {
int gpio_hwen;
struct lm3533_als_platform_data *als;
struct lm3533_bl_platform_data *backlights;
int num_backlights;
struct lm3533_led_platform_data *leds;
int num_leds;
};
extern int lm3533_ctrlbank_enable(struct lm3533_ctrlbank *cb);
extern int lm3533_ctrlbank_disable(struct lm3533_ctrlbank *cb);
extern int lm3533_ctrlbank_set_brightness(struct lm3533_ctrlbank *cb, u8 val);
extern int lm3533_ctrlbank_get_brightness(struct lm3533_ctrlbank *cb, u8 *val);
extern int lm3533_ctrlbank_set_max_current(struct lm3533_ctrlbank *cb, u8 val);
extern int lm3533_ctrlbank_get_max_current(struct lm3533_ctrlbank *cb,
u8 *val);
extern int lm3533_ctrlbank_set_pwm(struct lm3533_ctrlbank *cb, u8 val);
extern int lm3533_ctrlbank_get_pwm(struct lm3533_ctrlbank *cb, u8 *val);
extern int lm3533_read(struct lm3533 *lm3533, u8 reg, u8 *val);
extern int lm3533_write(struct lm3533 *lm3533, u8 reg, u8 val);
extern int lm3533_update(struct lm3533 *lm3533, u8 reg, u8 val, u8 mask);
#endif /* __LINUX_MFD_LM3533_H */
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