mvebu: add the new tlc59116 driver and migrate the Mamba to it

Signed-off-by: Imre Kaloz <kaloz@openwrt.org>

SVN-Revision: 43975

1 files changed, 297 insertions, 0 deletions

diff --git a/target/linux/mvebu/patches-3.18/051-leds_tlc59116_add_driver.patch b/target/linux/mvebu/patches-3.18/051-leds_tlc59116_add_driver.patch
new file mode 100644
index 0000000000..fd22aef580
--- /dev/null
+++ b/target/linux/mvebu/patches-3.18/051-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
+@@ -446,6 +446,14 @@ 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
+@@ -29,6 +29,7 @@ obj-$(CONFIG_LEDS_LP5562)		+= leds-lp556
+ obj-$(CONFIG_LEDS_LP8501)		+= leds-lp8501.o
+ obj-$(CONFIG_LEDS_LP8788)		+= leds-lp8788.o
+ obj-$(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", &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");