+++ /dev/null
-The TLC59116 is an I2C bus controlled 16-channel LED driver. Each LED
-output has its own 8-bit fixed-frequency PWM controller to control the
-brightness of the LED.
-
-This is based on a driver from Belkin, but has been extensively
-rewritten.
-
-Signed-off-by: Andrew Lunn <andrew@lunn.ch>
----
- drivers/leds/Kconfig | 8 ++
- drivers/leds/Makefile | 1 +
- drivers/leds/leds-tlc59116.c | 252 +++++++++++++++++++++++++++++++++++++++++++
- 3 files changed, 261 insertions(+)
- create mode 100644 drivers/leds/leds-tlc59116.c
-
---- a/drivers/leds/Kconfig
-+++ b/drivers/leds/Kconfig
-@@ -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_TLC59116
-+ tristate "LED driver for TLC59116F controllers"
-+ depends on LEDS_CLASS && I2C
-+ select REGMAP_I2C
-+ help
-+ This option enables support for Texas Instruments TLC59116F
-+ LED controller.
-+
- config LEDS_MAX8997
- tristate "LED support for MAX8997 PMIC"
- depends on LEDS_CLASS && MFD_MAX8997
---- a/drivers/leds/Makefile
-+++ b/drivers/leds/Makefile
-@@ -31,6 +31,7 @@ obj-$(CONFIG_LEDS_LP8501) += leds-lp850
- obj-$(CONFIG_LEDS_LP8788) += leds-lp8788.o
- obj-$(CONFIG_LEDS_LP8860) += leds-lp8860.o
- obj-$(CONFIG_LEDS_TCA6507) += leds-tca6507.o
-+obj-$(CONFIG_LEDS_TLC59116) += leds-tlc59116.o
- obj-$(CONFIG_LEDS_CLEVO_MAIL) += leds-clevo-mail.o
- obj-$(CONFIG_LEDS_IPAQ_MICRO) += leds-ipaq-micro.o
- obj-$(CONFIG_LEDS_HP6XX) += leds-hp6xx.o
---- /dev/null
-+++ b/drivers/leds/leds-tlc59116.c
-@@ -0,0 +1,252 @@
-+/*
-+ * Copyright 2014 Belkin Inc.
-+ * Copyright 2014 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/regmap.h>
-+#include <linux/slab.h>
-+#include <linux/workqueue.h>
-+
-+#define TLC59116_LEDS 16
-+
-+#define TLC59116_REG_MODE1 0x00
-+#define MODE1_RESPON_ADDR_MASK 0xF0
-+#define MODE1_NORMAL_MODE (0 << 4)
-+#define MODE1_SPEED_MODE (1 << 4)
-+
-+#define TLC59116_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 TLC59116_REG_PWM(x) (0x02 + (x))
-+
-+#define TLC59116_REG_GRPPWM 0x12
-+#define TLC59116_REG_GRPFREQ 0x13
-+
-+/* LED Driver Output State, determine the source that drives LED outputs */
-+#define TLC59116_REG_LEDOUT(x) (0x14 + ((x) >> 2))
-+#define TLC59116_LED_OFF 0x0 /* Output LOW */
-+#define TLC59116_LED_ON 0x1 /* Output HI-Z */
-+#define TLC59116_DIM 0x2 /* Dimming */
-+#define TLC59116_BLINK 0x3 /* Blinking */
-+#define LED_MASK 0x3
-+
-+#define ldev_to_led(c) container_of(c, struct tlc59116_led, ldev)
-+#define work_to_led(work) container_of(work, struct tlc59116_led, work)
-+
-+struct tlc59116_led {
-+ bool active;
-+ struct regmap *regmap;
-+ unsigned int led_no;
-+ struct led_classdev ldev;
-+ struct work_struct work;
-+};
-+
-+struct tlc59116_priv {
-+ struct tlc59116_led leds[TLC59116_LEDS];
-+};
-+
-+static int
-+tlc59116_set_mode(struct regmap *regmap, u8 mode)
-+{
-+ int err;
-+ u8 val;
-+
-+ if ((mode != MODE2_DIM) && (mode != MODE2_BLINK))
-+ mode = MODE2_DIM;
-+
-+ /* Configure MODE1 register */
-+ err = regmap_write(regmap, TLC59116_REG_MODE1, MODE1_NORMAL_MODE);
-+ if (err)
-+ return err;
-+
-+ /* Configure MODE2 Reg */
-+ val = MODE2_OCH_STOP | mode;
-+
-+ return regmap_write(regmap, TLC59116_REG_MODE2, val);
-+}
-+
-+static int
-+tlc59116_set_led(struct tlc59116_led *led, u8 val)
-+{
-+ struct regmap *regmap = led->regmap;
-+ unsigned int i = (led->led_no % 4) * 2;
-+ unsigned int addr = TLC59116_REG_LEDOUT(led->led_no);
-+ unsigned int mask = LED_MASK << i;
-+
-+ val = val << i;
-+
-+ return regmap_update_bits(regmap, addr, mask, val);
-+}
-+
-+static void
-+tlc59116_led_work(struct work_struct *work)
-+{
-+ struct tlc59116_led *led = work_to_led(work);
-+ struct regmap *regmap = led->regmap;
-+ int err;
-+ u8 pwm;
-+
-+ pwm = TLC59116_REG_PWM(led->led_no);
-+ err = regmap_write(regmap, pwm, led->ldev.brightness);
-+ if (err)
-+ dev_err(led->ldev.dev, "Failed setting brightness\n");
-+}
-+
-+static void
-+tlc59116_led_set(struct led_classdev *led_cdev, enum led_brightness value)
-+{
-+ struct tlc59116_led *led = ldev_to_led(led_cdev);
-+
-+ led->ldev.brightness = value;
-+ schedule_work(&led->work);
-+}
-+
-+static void
-+tlc59116_destroy_devices(struct tlc59116_priv *priv, unsigned int i)
-+{
-+ while (--i >= 0) {
-+ if (priv->leds[i].active) {
-+ led_classdev_unregister(&priv->leds[i].ldev);
-+ cancel_work_sync(&priv->leds[i].work);
-+ }
-+ }
-+}
-+
-+static int
-+tlc59116_configure(struct device *dev,
-+ struct tlc59116_priv *priv,
-+ struct regmap *regmap)
-+{
-+ unsigned int i;
-+ int err = 0;
-+
-+ tlc59116_set_mode(regmap, MODE2_DIM);
-+ for (i = 0; i < TLC59116_LEDS; i++) {
-+ struct tlc59116_led *led = &priv->leds[i];
-+
-+ if (!led->active)
-+ continue;
-+
-+ led->regmap = regmap;
-+ led->led_no = i;
-+ led->ldev.brightness_set = tlc59116_led_set;
-+ led->ldev.max_brightness = LED_FULL;
-+ INIT_WORK(&led->work, tlc59116_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;
-+ }
-+ tlc59116_set_led(led, TLC59116_DIM);
-+ }
-+
-+ return 0;
-+
-+exit:
-+ tlc59116_destroy_devices(priv, i);
-+ return err;
-+}
-+
-+static const struct regmap_config tlc59116_regmap = {
-+ .reg_bits = 8,
-+ .val_bits = 8,
-+ .max_register = 0x1e,
-+};
-+
-+static int
-+tlc59116_probe(struct i2c_client *client,
-+ const struct i2c_device_id *id)
-+{
-+ struct tlc59116_priv *priv = i2c_get_clientdata(client);
-+ struct device *dev = &client->dev;
-+ struct device_node *np = client->dev.of_node, *child;
-+ struct regmap *regmap;
-+ int err, count, reg;
-+
-+ count = of_get_child_count(np);
-+ if (!count || count > TLC59116_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;
-+
-+ regmap = devm_regmap_init_i2c(client, &tlc59116_regmap);
-+ if (IS_ERR(regmap)) {
-+ err = PTR_ERR(regmap);
-+ dev_err(dev, "Failed to allocate register map: %d\n", err);
-+ return err;
-+ }
-+
-+ 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 >= TLC59116_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 tlc59116_configure(dev, priv, regmap);
-+}
-+
-+static int
-+tlc59116_remove(struct i2c_client *client)
-+{
-+ struct tlc59116_priv *priv = i2c_get_clientdata(client);
-+
-+ tlc59116_destroy_devices(priv, TLC59116_LEDS);
-+
-+ return 0;
-+}
-+
-+static const struct of_device_id of_tlc59116_leds_match[] = {
-+ { .compatible = "ti,tlc59116", },
-+ {},
-+};
-+MODULE_DEVICE_TABLE(of, of_tlc59116_leds_match);
-+
-+static const struct i2c_device_id tlc59116_id[] = {
-+ { "tlc59116" },
-+ {},
-+};
-+MODULE_DEVICE_TABLE(i2c, tlc59116_id);
-+
-+static struct i2c_driver tlc59116_driver = {
-+ .driver = {
-+ .name = "tlc59116",
-+ .of_match_table = of_match_ptr(of_tlc59116_leds_match),
-+ },
-+ .probe = tlc59116_probe,
-+ .remove = tlc59116_remove,
-+ .id_table = tlc59116_id,
-+};
-+
-+module_i2c_driver(tlc59116_driver);
-+
-+MODULE_AUTHOR("Andrew Lunn <andrew@lunn.ch>");
-+MODULE_LICENSE("GPL");
-+MODULE_DESCRIPTION("TLC59116 LED driver");
projects / openwrt / svn-archive / archive.git / blobdiff