| Message ID | 1420763178-10115-3-git-send-email-andrew@lunn.ch (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
On Friday 09 January 2015 05:56 AM, Andrew Lunn wrote: > 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> > Cc: Matthew.Fatheree@belkin.com > --- > drivers/leds/Kconfig | 7 ++ > drivers/leds/Makefile | 1 + > drivers/leds/leds-tlc59116.c | 253 +++++++++++++++++++++++++++++++++++++++++++ > 3 files changed, 261 insertions(+) > create mode 100644 drivers/leds/leds-tlc59116.c > (...) > +static const struct of_device_id of_tlc59116_leds_match[] = { > + { .compatible = "ti,tlc59116", }, > + {}, > +}; > + Missing MODULE_DEVICE_TABLE(of, ...)..? > +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), > + Remove this unnecessary line space... > + }, > + .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");
On Thu, Jan 8, 2015 at 4:26 PM, Andrew Lunn <andrew@lunn.ch> wrote: > 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> > Cc: Matthew.Fatheree@belkin.com > --- > drivers/leds/Kconfig | 7 ++ > drivers/leds/Makefile | 1 + > drivers/leds/leds-tlc59116.c | 253 +++++++++++++++++++++++++++++++++++++++++++ > 3 files changed, 261 insertions(+) > create mode 100644 drivers/leds/leds-tlc59116.c > > diff --git a/drivers/leds/Kconfig b/drivers/leds/Kconfig > index a6c3d2f153f3..06a24ec60a27 100644 > --- a/drivers/leds/Kconfig > +++ b/drivers/leds/Kconfig > @@ -457,6 +457,13 @@ 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 > + 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 > diff --git a/drivers/leds/Makefile b/drivers/leds/Makefile > index 1c65a191d907..8e7d20acfa7b 100644 > --- a/drivers/leds/Makefile > +++ b/drivers/leds/Makefile > @@ -30,6 +30,7 @@ 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-$(CONFIG_LEDS_TLC59116) += leds-tlc59116.o > obj-$(CONFIG_LEDS_CLEVO_MAIL) += leds-clevo-mail.o > obj-$(CONFIG_LEDS_IPAQ_MICRO) += leds-ipaq-micro.o > obj-$(CONFIG_LEDS_HP6XX) += leds-hp6xx.o > diff --git a/drivers/leds/leds-tlc59116.c b/drivers/leds/leds-tlc59116.c > new file mode 100644 > index 000000000000..377479af1ba4 > --- /dev/null > +++ b/drivers/leds/leds-tlc59116.c > @@ -0,0 +1,253 @@ > +/* > + * 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/module.h> > +#include <linux/i2c.h> > +#include <linux/leds.h> > +#include <linux/of.h> > +#include <linux/regmap.h> > +#include <linux/slab.h> > +#include <linux/workqueue.h> > + Please make this list in alphabetic sequence. > +#define TLC59116_LEDS 16 > + > +#define TLC59116_REG_MODE1 0x00 /* Mode register 0 */ > +#define MODE1_RESPON_ADDR_MASK 0xF0 > +#define MODE1_NORMAL_MODE (0 << 4) > +#define MODE1_SPEED_MODE (1 << 4) > + > +#define TLC59116_REG_MODE2 0x01 /* Mode register 1 */ > +#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; > + 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, uint8_t mode) Why not just us u8 instead of uint8_t? > +{ > + uint8_t val = 0; > + > + if ((mode != MODE2_DIM) && (mode != MODE2_BLINK)) > + mode = MODE2_DIM; > + > + /* Configure MODE1 register */ > + val &= 0x0; You don't need this, since val = 0 from beginning. > + val &= MODE1_RESPON_ADDR_MASK; > + val |= MODE1_NORMAL_MODE; > + regmap_write(regmap, TLC59116_REG_MODE1, val); > + Need we check the return status of regmap_write()? > + /* Configure MODE2 Reg */ > + val &= 0x00; > + val |= MODE2_OCH_STOP; > + > + val |= mode; > + > + regmap_write(regmap, TLC59116_REG_MODE2, val); > + > + return 0; > +} > + > +static int > +tlc59116_set_led(struct tlc59116_led *led, uint8_t val) > +{ > + struct regmap *regmap = led->regmap; > + int i = (led->led_no % 4) * 2; > + char 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; > + uint8_t pwm; > + > + pwm = TLC59116_REG_PWM(led->led_no); > + regmap_write(regmap, pwm, led->ldev.brightness); > +} > + > +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, 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) > +{ > + int i, 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", }, > + {}, > +}; > + > +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"); > -- > 2.1.3 >
> > +static int > > +tlc59116_set_mode(struct regmap *regmap, uint8_t mode) > > Why not just us u8 instead of uint8_t? It is what the Belkin driver did. I can change this. > > > +{ > > + uint8_t val = 0; > > + > > + if ((mode != MODE2_DIM) && (mode != MODE2_BLINK)) > > + mode = MODE2_DIM; > > + > > + /* Configure MODE1 register */ > > + val &= 0x0; > You don't need this, since val = 0 from beginning. > > > + val &= MODE1_RESPON_ADDR_MASK; > > + val |= MODE1_NORMAL_MODE; > > + regmap_write(regmap, TLC59116_REG_MODE1, val); > > + > Need we check the return status of regmap_write()? I will do that. Thanks for the feedback Andrew > > + /* Configure MODE2 Reg */ > > + val &= 0x00; > > + val |= MODE2_OCH_STOP; > > + > > + val |= mode; > > + > > + regmap_write(regmap, TLC59116_REG_MODE2, val); > > + > > + return 0; > > +} > > + > > +static int > > +tlc59116_set_led(struct tlc59116_led *led, uint8_t val) > > +{ > > + struct regmap *regmap = led->regmap; > > + int i = (led->led_no % 4) * 2; > > + char 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; > > + uint8_t pwm; > > + > > + pwm = TLC59116_REG_PWM(led->led_no); > > + regmap_write(regmap, pwm, led->ldev.brightness); > > +} > > + > > +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, 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) > > +{ > > + int i, 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", }, > > + {}, > > +}; > > + > > +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"); > > -- > > 2.1.3 > >
On Fri, Jan 09, 2015 at 06:06:05AM +0530, Varka Bhadram wrote: > > On Friday 09 January 2015 05:56 AM, Andrew Lunn wrote: > >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> > >Cc: Matthew.Fatheree@belkin.com > >--- > > drivers/leds/Kconfig | 7 ++ > > drivers/leds/Makefile | 1 + > > drivers/leds/leds-tlc59116.c | 253 +++++++++++++++++++++++++++++++++++++++++++ > > 3 files changed, 261 insertions(+) > > create mode 100644 drivers/leds/leds-tlc59116.c > > > (...) > > >+static const struct of_device_id of_tlc59116_leds_match[] = { > >+ { .compatible = "ti,tlc59116", }, > >+ {}, > >+}; > >+ > > Missing MODULE_DEVICE_TABLE(of, ...)..? Thanks. I will add it. I was using leds-tca6507.c as my reference. It also does not have one, but i will leave that to somebody else to fix. Andrew > >+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), > >+ > > Remove this unnecessary line space... > > >+ }, > >+ .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"); > > -- > Thanks and Regards, > Varka Bhadram. >
Hi Andrew, On Fri, 09 Jan 2015 01:26:18 +0100, Andrew Lunn <andrew@lunn.ch> wrote: > 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. > <snip> > +config LEDS_TLC59116 > + tristate "LED driver for TLC59116F controllers" > + depends on LEDS_CLASS && I2C I think you need "select REGMAP_I2C" as well. > + 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 Imre
On Fri, Jan 09, 2015 at 01:46:10PM +0100, Imre Kaloz wrote: > Hi Andrew, > > On Fri, 09 Jan 2015 01:26:18 +0100, Andrew Lunn <andrew@lunn.ch> wrote: > > >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. > > > <snip> > > >+config LEDS_TLC59116 > >+ tristate "LED driver for TLC59116F controllers" > >+ depends on LEDS_CLASS && I2C > > I think you need "select REGMAP_I2C" as well. Yes, you are right. Thanks Andrew > > >+ 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 > > > > Imre > > _______________________________________________ > linux-arm-kernel mailing list > linux-arm-kernel@lists.infradead.org > http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
diff --git a/drivers/leds/Kconfig b/drivers/leds/Kconfig index a6c3d2f153f3..06a24ec60a27 100644 --- a/drivers/leds/Kconfig +++ b/drivers/leds/Kconfig @@ -457,6 +457,13 @@ 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 + 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 diff --git a/drivers/leds/Makefile b/drivers/leds/Makefile index 1c65a191d907..8e7d20acfa7b 100644 --- a/drivers/leds/Makefile +++ b/drivers/leds/Makefile @@ -30,6 +30,7 @@ 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-$(CONFIG_LEDS_TLC59116) += leds-tlc59116.o obj-$(CONFIG_LEDS_CLEVO_MAIL) += leds-clevo-mail.o obj-$(CONFIG_LEDS_IPAQ_MICRO) += leds-ipaq-micro.o obj-$(CONFIG_LEDS_HP6XX) += leds-hp6xx.o diff --git a/drivers/leds/leds-tlc59116.c b/drivers/leds/leds-tlc59116.c new file mode 100644 index 000000000000..377479af1ba4 --- /dev/null +++ b/drivers/leds/leds-tlc59116.c @@ -0,0 +1,253 @@ +/* + * 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/module.h> +#include <linux/i2c.h> +#include <linux/leds.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 /* Mode register 0 */ +#define MODE1_RESPON_ADDR_MASK 0xF0 +#define MODE1_NORMAL_MODE (0 << 4) +#define MODE1_SPEED_MODE (1 << 4) + +#define TLC59116_REG_MODE2 0x01 /* Mode register 1 */ +#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; + 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, uint8_t mode) +{ + uint8_t val = 0; + + if ((mode != MODE2_DIM) && (mode != MODE2_BLINK)) + mode = MODE2_DIM; + + /* Configure MODE1 register */ + val &= 0x0; + val &= MODE1_RESPON_ADDR_MASK; + val |= MODE1_NORMAL_MODE; + regmap_write(regmap, TLC59116_REG_MODE1, val); + + /* Configure MODE2 Reg */ + val &= 0x00; + val |= MODE2_OCH_STOP; + + val |= mode; + + regmap_write(regmap, TLC59116_REG_MODE2, val); + + return 0; +} + +static int +tlc59116_set_led(struct tlc59116_led *led, uint8_t val) +{ + struct regmap *regmap = led->regmap; + int i = (led->led_no % 4) * 2; + char 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; + uint8_t pwm; + + pwm = TLC59116_REG_PWM(led->led_no); + regmap_write(regmap, pwm, led->ldev.brightness); +} + +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, 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) +{ + int i, 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", }, + {}, +}; + +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");
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> Cc: Matthew.Fatheree@belkin.com --- drivers/leds/Kconfig | 7 ++ drivers/leds/Makefile | 1 + drivers/leds/leds-tlc59116.c | 253 +++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 261 insertions(+) create mode 100644 drivers/leds/leds-tlc59116.c