mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-11-24 04:34:08 +08:00
leds: tlc591xx: Driver for the TI 8/16 Channel i2c LED driver
The TLC59116 is an I2C bus controlled 16-channel LED driver. The TLC59108 is an I2C bus controlled 8-channel LED driver, which is very similar to the TLC59116. Each LED output has its own 8-bit fixed-frequency PWM controller to control the brightness of the LED. The LEDs can also be fixed off and on, making them suitable for use as GPOs. This is based on a driver from Belkin, but has been extensively rewritten and extended to support both 08 and 16 versions. Signed-off-by: Andrew Lunn <andrew@lunn.ch> Tested-by: Imre Kaloz <kaloz@openwrt.org> Cc: Matthew.Fatheree@belkin.com Acked-by: Jacek Anaszewski <j.anaszewski@samsung.com> Signed-off-by: Bryan Wu <cooloney@gmail.com>
This commit is contained in:
Andrew Lunn
Bryan Wu
parent
e0d4ffc367
commit
e370d010a5
@ -467,6 +467,14 @@ config LEDS_TCA6507
|
||||
LED driver chips accessed via the I2C bus.
|
||||
Driver support brightness control and hardware-assisted blinking.
|
||||
|
||||
config LEDS_TLC591XX
|
||||
tristate "LED driver for TLC59108 and TLC59116 controllers"
|
||||
depends on LEDS_CLASS && I2C
|
||||
select REGMAP_I2C
|
||||
help
|
||||
This option enables support for Texas Instruments TLC59108
|
||||
and TLC59116 LED controllers.
|
||||
|
||||
config LEDS_MAX8997
|
||||
tristate "LED support for MAX8997 PMIC"
|
||||
depends on LEDS_CLASS && MFD_MAX8997
|
||||
|
||||
@ -31,6 +31,7 @@ obj-$(CONFIG_LEDS_LP8501) += leds-lp8501.o
|
||||
obj-$(CONFIG_LEDS_LP8788) += leds-lp8788.o
|
||||
obj-$(CONFIG_LEDS_LP8860) += leds-lp8860.o
|
||||
obj-$(CONFIG_LEDS_TCA6507) += leds-tca6507.o
|
||||
obj-$(CONFIG_LEDS_TLC591XX) += leds-tlc591xx.o
|
||||
obj-$(CONFIG_LEDS_CLEVO_MAIL) += leds-clevo-mail.o
|
||||
obj-$(CONFIG_LEDS_IPAQ_MICRO) += leds-ipaq-micro.o
|
||||
obj-$(CONFIG_LEDS_HP6XX) += leds-hp6xx.o
|
||||
|
||||
300
drivers/leds/leds-tlc591xx.c
Normal file
300
drivers/leds/leds-tlc591xx.c
Normal file
@ -0,0 +1,300 @@
|
||||
/*
|
||||
* Copyright 2014 Belkin Inc.
|
||||
* Copyright 2015 Andrew Lunn <andrew@lunn.ch>
|
||||
*
|
||||
* 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; version 2 of the License.
|
||||
*/
|
||||
|
||||
#include <linux/i2c.h>
|
||||
#include <linux/leds.h>
|
||||
#include <linux/module.h>
|
||||
#include <linux/of.h>
|
||||
#include <linux/of_device.h>
|
||||
#include <linux/regmap.h>
|
||||
#include <linux/slab.h>
|
||||
#include <linux/workqueue.h>
|
||||
|
||||
#define TLC591XX_MAX_LEDS 16
|
||||
|
||||
#define TLC591XX_REG_MODE1 0x00
|
||||
#define MODE1_RESPON_ADDR_MASK 0xF0
|
||||
#define MODE1_NORMAL_MODE (0 << 4)
|
||||
#define MODE1_SPEED_MODE (1 << 4)
|
||||
|
||||
#define TLC591XX_REG_MODE2 0x01
|
||||
#define MODE2_DIM (0 << 5)
|
||||
#define MODE2_BLINK (1 << 5)
|
||||
#define MODE2_OCH_STOP (0 << 3)
|
||||
#define MODE2_OCH_ACK (1 << 3)
|
||||
|
||||
#define TLC591XX_REG_PWM(x) (0x02 + (x))
|
||||
|
||||
#define TLC591XX_REG_GRPPWM 0x12
|
||||
#define TLC591XX_REG_GRPFREQ 0x13
|
||||
|
||||
/* LED Driver Output State, determine the source that drives LED outputs */
|
||||
#define LEDOUT_OFF 0x0 /* Output LOW */
|
||||
#define LEDOUT_ON 0x1 /* Output HI-Z */
|
||||
#define LEDOUT_DIM 0x2 /* Dimming */
|
||||
#define LEDOUT_BLINK 0x3 /* Blinking */
|
||||
#define LEDOUT_MASK 0x3
|
||||
|
||||
#define ldev_to_led(c) container_of(c, struct tlc591xx_led, ldev)
|
||||
#define work_to_led(work) container_of(work, struct tlc591xx_led, work)
|
||||
|
||||
struct tlc591xx_led {
|
||||
bool active;
|
||||
unsigned int led_no;
|
||||
struct led_classdev ldev;
|
||||
struct work_struct work;
|
||||
struct tlc591xx_priv *priv;
|
||||
};
|
||||
|
||||
struct tlc591xx_priv {
|
||||
struct tlc591xx_led leds[TLC591XX_MAX_LEDS];
|
||||
struct regmap *regmap;
|
||||
unsigned int reg_ledout_offset;
|
||||
};
|
||||
|
||||
struct tlc591xx {
|
||||
unsigned int max_leds;
|
||||
unsigned int reg_ledout_offset;
|
||||
};
|
||||
|
||||
static const struct tlc591xx tlc59116 = {
|
||||
.max_leds = 16,
|
||||
.reg_ledout_offset = 0x14,
|
||||
};
|
||||
|
||||
static const struct tlc591xx tlc59108 = {
|
||||
.max_leds = 8,
|
||||
.reg_ledout_offset = 0x0c,
|
||||
};
|
||||
|
||||
static int
|
||||
tlc591xx_set_mode(struct regmap *regmap, u8 mode)
|
||||
{
|
||||
int err;
|
||||
u8 val;
|
||||
|
||||
err = regmap_write(regmap, TLC591XX_REG_MODE1, MODE1_NORMAL_MODE);
|
||||
if (err)
|
||||
return err;
|
||||
|
||||
val = MODE2_OCH_STOP | mode;
|
||||
|
||||
return regmap_write(regmap, TLC591XX_REG_MODE2, val);
|
||||
}
|
||||
|
||||
static int
|
||||
tlc591xx_set_ledout(struct tlc591xx_priv *priv, struct tlc591xx_led *led,
|
||||
u8 val)
|
||||
{
|
||||
unsigned int i = (led->led_no % 4) * 2;
|
||||
unsigned int mask = LEDOUT_MASK << i;
|
||||
unsigned int addr = priv->reg_ledout_offset + (led->led_no >> 2);
|
||||
|
||||
val = val << i;
|
||||
|
||||
return regmap_update_bits(priv->regmap, addr, mask, val);
|
||||
}
|
||||
|
||||
static int
|
||||
tlc591xx_set_pwm(struct tlc591xx_priv *priv, struct tlc591xx_led *led,
|
||||
u8 brightness)
|
||||
{
|
||||
u8 pwm = TLC591XX_REG_PWM(led->led_no);
|
||||
|
||||
return regmap_write(priv->regmap, pwm, brightness);
|
||||
}
|
||||
|
||||
static void
|
||||
tlc591xx_led_work(struct work_struct *work)
|
||||
{
|
||||
struct tlc591xx_led *led = work_to_led(work);
|
||||
struct tlc591xx_priv *priv = led->priv;
|
||||
enum led_brightness brightness = led->ldev.brightness;
|
||||
int err;
|
||||
|
||||
switch (brightness) {
|
||||
case 0:
|
||||
err = tlc591xx_set_ledout(priv, led, LEDOUT_OFF);
|
||||
break;
|
||||
case LED_FULL:
|
||||
err = tlc591xx_set_ledout(priv, led, LEDOUT_ON);
|
||||
break;
|
||||
default:
|
||||
err = tlc591xx_set_ledout(priv, led, LEDOUT_DIM);
|
||||
if (!err)
|
||||
err = tlc591xx_set_pwm(priv, led, brightness);
|
||||
}
|
||||
|
||||
if (err)
|
||||
dev_err(led->ldev.dev, "Failed setting brightness\n");
|
||||
}
|
||||
|
||||
static void
|
||||
tlc591xx_brightness_set(struct led_classdev *led_cdev,
|
||||
enum led_brightness brightness)
|
||||
{
|
||||
struct tlc591xx_led *led = ldev_to_led(led_cdev);
|
||||
|
||||
led->ldev.brightness = brightness;
|
||||
schedule_work(&led->work);
|
||||
}
|
||||
|
||||
static void
|
||||
tlc591xx_destroy_devices(struct tlc591xx_priv *priv, unsigned int j)
|
||||
{
|
||||
int i = j;
|
||||
|
||||
while (--i >= 0) {
|
||||
if (priv->leds[i].active) {
|
||||
led_classdev_unregister(&priv->leds[i].ldev);
|
||||
cancel_work_sync(&priv->leds[i].work);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
static int
|
||||
tlc591xx_configure(struct device *dev,
|
||||
struct tlc591xx_priv *priv,
|
||||
const struct tlc591xx *tlc591xx)
|
||||
{
|
||||
unsigned int i;
|
||||
int err = 0;
|
||||
|
||||
tlc591xx_set_mode(priv->regmap, MODE2_DIM);
|
||||
for (i = 0; i < TLC591XX_MAX_LEDS; i++) {
|
||||
struct tlc591xx_led *led = &priv->leds[i];
|
||||
|
||||
if (!led->active)
|
||||
continue;
|
||||
|
||||
led->priv = priv;
|
||||
led->led_no = i;
|
||||
led->ldev.brightness_set = tlc591xx_brightness_set;
|
||||
led->ldev.max_brightness = LED_FULL;
|
||||
INIT_WORK(&led->work, tlc591xx_led_work);
|
||||
err = led_classdev_register(dev, &led->ldev);
|
||||
if (err < 0) {
|
||||
dev_err(dev, "couldn't register LED %s\n",
|
||||
led->ldev.name);
|
||||
goto exit;
|
||||
}
|
||||
}
|
||||
|
||||
return 0;
|
||||
|
||||
exit:
|
||||
tlc591xx_destroy_devices(priv, i);
|
||||
return err;
|
||||
}
|
||||
|
||||
static const struct regmap_config tlc591xx_regmap = {
|
||||
.reg_bits = 8,
|
||||
.val_bits = 8,
|
||||
.max_register = 0x1e,
|
||||
};
|
||||
|
||||
static const struct of_device_id of_tlc591xx_leds_match[] = {
|
||||
{ .compatible = "ti,tlc59116",
|
||||
.data = &tlc59116 },
|
||||
{ .compatible = "ti,tlc59108",
|
||||
.data = &tlc59108 },
|
||||
{},
|
||||
};
|
||||
MODULE_DEVICE_TABLE(of, of_tlc591xx_leds_match);
|
||||
|
||||
static int
|
||||
tlc591xx_probe(struct i2c_client *client,
|
||||
const struct i2c_device_id *id)
|
||||
{
|
||||
struct device_node *np = client->dev.of_node, *child;
|
||||
struct device *dev = &client->dev;
|
||||
const struct of_device_id *match;
|
||||
const struct tlc591xx *tlc591xx;
|
||||
struct tlc591xx_priv *priv;
|
||||
int err, count, reg;
|
||||
|
||||
match = of_match_device(of_tlc591xx_leds_match, dev);
|
||||
if (!match)
|
||||
return -ENODEV;
|
||||
|
||||
tlc591xx = match->data;
|
||||
if (!np)
|
||||
return -ENODEV;
|
||||
|
||||
count = of_get_child_count(np);
|
||||
if (!count || count > tlc591xx->max_leds)
|
||||
return -EINVAL;
|
||||
|
||||
if (!i2c_check_functionality(client->adapter,
|
||||
I2C_FUNC_SMBUS_BYTE_DATA))
|
||||
return -EIO;
|
||||
|
||||
priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
|
||||
if (!priv)
|
||||
return -ENOMEM;
|
||||
|
||||
priv->regmap = devm_regmap_init_i2c(client, &tlc591xx_regmap);
|
||||
if (IS_ERR(priv->regmap)) {
|
||||
err = PTR_ERR(priv->regmap);
|
||||
dev_err(dev, "Failed to allocate register map: %d\n", err);
|
||||
return err;
|
||||
}
|
||||
priv->reg_ledout_offset = tlc591xx->reg_ledout_offset;
|
||||
|
||||
i2c_set_clientdata(client, priv);
|
||||
|
||||
for_each_child_of_node(np, child) {
|
||||
err = of_property_read_u32(child, "reg", ®);
|
||||
if (err)
|
||||
return err;
|
||||
if (reg < 0 || reg >= tlc591xx->max_leds)
|
||||
return -EINVAL;
|
||||
if (priv->leds[reg].active)
|
||||
return -EINVAL;
|
||||
priv->leds[reg].active = true;
|
||||
priv->leds[reg].ldev.name =
|
||||
of_get_property(child, "label", NULL) ? : child->name;
|
||||
priv->leds[reg].ldev.default_trigger =
|
||||
of_get_property(child, "linux,default-trigger", NULL);
|
||||
}
|
||||
return tlc591xx_configure(dev, priv, tlc591xx);
|
||||
}
|
||||
|
||||
static int
|
||||
tlc591xx_remove(struct i2c_client *client)
|
||||
{
|
||||
struct tlc591xx_priv *priv = i2c_get_clientdata(client);
|
||||
|
||||
tlc591xx_destroy_devices(priv, TLC591XX_MAX_LEDS);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static const struct i2c_device_id tlc591xx_id[] = {
|
||||
{ "tlc59116" },
|
||||
{ "tlc59108" },
|
||||
{},
|
||||
};
|
||||
MODULE_DEVICE_TABLE(i2c, tlc591xx_id);
|
||||
|
||||
static struct i2c_driver tlc591xx_driver = {
|
||||
.driver = {
|
||||
.name = "tlc591xx",
|
||||
.of_match_table = of_match_ptr(of_tlc591xx_leds_match),
|
||||
},
|
||||
.probe = tlc591xx_probe,
|
||||
.remove = tlc591xx_remove,
|
||||
.id_table = tlc591xx_id,
|
||||
};
|
||||
|
||||
module_i2c_driver(tlc591xx_driver);
|
||||
|
||||
MODULE_AUTHOR("Andrew Lunn <andrew@lunn.ch>");
|
||||
MODULE_LICENSE("GPL");
|
||||
MODULE_DESCRIPTION("TLC591XX LED driver");
|
||||
Loading…
Reference in New Issue
Block a user