diff options
Diffstat (limited to 'target/linux/mvebu/patches-4.0/051-leds_tlc59116_add_driver.patch')
| -rw-r--r-- | target/linux/mvebu/patches-4.0/051-leds_tlc59116_add_driver.patch | 297 |
1 files changed, 297 insertions, 0 deletions
diff --git a/target/linux/mvebu/patches-4.0/051-leds_tlc59116_add_driver.patch b/target/linux/mvebu/patches-4.0/051-leds_tlc59116_add_driver.patch new file mode 100644 index 0000000..31110ad --- /dev/null +++ b/target/linux/mvebu/patches-4.0/051-leds_tlc59116_add_driver.patch @@ -0,0 +1,297 @@ +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"); |