diff options
Diffstat (limited to 'target/linux/mvebu/patches-4.1/051-leds_tlc59116_add_driver.patch')
| -rw-r--r-- | target/linux/mvebu/patches-4.1/051-leds_tlc59116_add_driver.patch | 297 |
1 files changed, 0 insertions, 297 deletions
diff --git a/target/linux/mvebu/patches-4.1/051-leds_tlc59116_add_driver.patch b/target/linux/mvebu/patches-4.1/051-leds_tlc59116_add_driver.patch deleted file mode 100644 index 31110adf35..0000000000 --- a/target/linux/mvebu/patches-4.1/051-leds_tlc59116_add_driver.patch +++ /dev/null @@ -1,297 +0,0 @@ -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"); |