==== cut here ====
From 66bf0442f949f4da02d5b4cae584cc7148f7b63c Mon Sep 17 00:00:00 2001
From: Felipe Balbi <me@felipebalbi.com>
Date: Wed, 18 Feb 2009 01:17:28 +0200
Subject: [PATCH] i2c: chips: remove lp5521 driver

It's now coming via LED tree so it should be
safe to get rid of it here and wait till next
mainline merge.

Signed-off-by: Felipe Balbi <me@felipebalbi.com>
---
 drivers/i2c/chips/Kconfig  |    7 -
 drivers/i2c/chips/Makefile |    1 -
 drivers/i2c/chips/lp5521.c |  585 --------------------------------------------
 3 files changed, 0 insertions(+), 593 deletions(-)
 delete mode 100644 drivers/i2c/chips/lp5521.c

diff --git a/drivers/i2c/chips/Kconfig b/drivers/i2c/chips/Kconfig
index bb95b3e..e4831e1 100644
--- a/drivers/i2c/chips/Kconfig
+++ b/drivers/i2c/chips/Kconfig
@@ -141,13 +141,6 @@ config SENSORS_TSL2563
          This driver can also be built as a module.  If so, the module
          will be called tsl2563.
 
-config LP5521
-	tristate "LP5521 LED driver chip"
-	depends on I2C
-	help
-	  If you say yes here you get support for the National Semiconductor
-	  LP5521 LED driver.
-
 config MENELAUS
 	bool "TWL92330/Menelaus PM chip"
 	depends on I2C=y && ARCH_OMAP24XX
diff --git a/drivers/i2c/chips/Makefile b/drivers/i2c/chips/Makefile
index 32a395f..1c94712 100644
--- a/drivers/i2c/chips/Makefile
+++ b/drivers/i2c/chips/Makefile
@@ -21,7 +21,6 @@ obj-$(CONFIG_TWL4030_POWEROFF)	+= twl4030-poweroff.o
 obj-$(CONFIG_TWL4030_PWRBUTTON)	+= twl4030-pwrbutton.o
 obj-$(CONFIG_TWL4030_MADC)	+= twl4030-madc.o
 obj-$(CONFIG_RTC_X1205_I2C)	+= x1205.o
-obj-$(CONFIG_LP5521)		+= lp5521.o
 
 ifeq ($(CONFIG_I2C_DEBUG_CHIP),y)
 EXTRA_CFLAGS += -DDEBUG
diff --git a/drivers/i2c/chips/lp5521.c b/drivers/i2c/chips/lp5521.c
deleted file mode 100644
index c0862d9..0000000
--- a/drivers/i2c/chips/lp5521.c
+++ /dev/null
@@ -1,585 +0,0 @@
-/*
- * drivers/i2c/chips/lp5521.c
- *
- * Copyright (C) 2007 Nokia Corporation
- *
- * Written by Mathias Nyman <mathias.nyman@nokia.com>
- *
- * 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; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
- */
-
-#include <linux/module.h>
-#include <linux/init.h>
-#include <linux/i2c.h>
-#include <linux/mutex.h>
-#include <mach/gpio.h>
-
-#define LP5521_DRIVER_NAME		"lp5521"
-
-#ifdef LED_CONNECTED_WRONG
-#define LP5521_REG_R_PWM		0x04
-#define LP5521_REG_B_PWM		0x02
-#else
-#define LP5521_REG_R_PWM		0x02
-#define LP5521_REG_B_PWM		0x04
-#endif
-#define LP5521_REG_ENABLE		0x00
-#define LP5521_REG_OP_MODE		0x01
-#define LP5521_REG_G_PWM		0x03
-#define LP5521_REG_R_CNTRL		0x05
-#define LP5521_REG_G_CNTRL		0x06
-#define LP5521_REG_B_CNTRL		0x07
-#define LP5521_REG_MISC			0x08
-#define LP5521_REG_R_CHANNEL_PC		0x09
-#define LP5521_REG_G_CHANNEL_PC		0x0a
-#define LP5521_REG_B_CHANNEL_PC		0x0b
-#define LP5521_REG_STATUS		0x0c
-#define LP5521_REG_RESET		0x0d
-#define LP5521_REG_GPO			0x0e
-#define LP5521_REG_R_PROG_MEM		0x10
-#define LP5521_REG_G_PROG_MEM		0x30
-#define LP5521_REG_B_PROG_MEM		0x50
-
-#define LP5521_MODE_LOAD		"load"
-#define LP5521_MODE_RUN			"run"
-#define LP5521_MODE_DIRECT_CONTROL	"direct"
-
-#define LP5521_CURRENT_1m5		0x0f
-#define LP5521_CURRENT_3m1		0x1f
-#define LP5521_CURRENT_4m7		0x2f
-#define LP5521_CURRENT_6m3		0x3f
-#define LP5521_CURRENT_7m9		0x4f
-#define LP5521_CURRENT_9m5		0x5f
-#define LP5521_CURRENT_11m1		0x6f
-#define LP5521_CURRENT_12m7		0x7f
-#define LP5521_CURRENT_14m3		0x8f
-#define LP5521_CURRENT_15m9		0x9f
-#define LP5521_CURRENT_17m5		0xaf
-#define LP5521_CURRENT_19m1		0xbf
-#define LP5521_CURRENT_20m7		0xcf
-#define LP5521_CURRENT_22m3		0xdf
-#define LP5521_CURRENT_23m9		0xef
-#define LP5521_CURRENT_25m5		0xff
-
-#define LP5521_PROGRAM_LENGTH		32	/* in bytes */
-
-struct lp5521_chip {
-	struct mutex		lock;
-	struct i2c_client	*client;
-	char			*mode;
-	int			red;
-	int			green;
-	int			blue;
-};
-
-static int lp5521_set_mode(struct lp5521_chip *chip, char *mode);
-
-static int lp5521_write(struct i2c_client *client, u8 reg, u8 value)
-{
-	return i2c_smbus_write_byte_data(client, reg, value);
-}
-
-static int lp5521_read(struct i2c_client *client, u8 reg, u8 *buf)
-{
-	s32 ret = i2c_smbus_read_byte_data(client, reg);
-
-	if (ret < 0)
-		return -EIO;
-
-	*buf = ret;
-	return 0;
-}
-
-static int lp5521_configure(struct i2c_client *client)
-{
-	int ret = 0;
-
-	/* Enable chip and set light to logarithmic mode*/
-	ret |= lp5521_write(client, LP5521_REG_ENABLE, 0xc0);
-
-	/* setting all color pwms to direct control mode */
-	ret |= lp5521_write(client, LP5521_REG_OP_MODE, 0x3f);
-
-	/* setting current to 4.7 mA for all channels */
-	ret |= lp5521_write(client, LP5521_REG_R_CNTRL, LP5521_CURRENT_4m7);
-	ret |= lp5521_write(client, LP5521_REG_G_CNTRL, LP5521_CURRENT_4m7);
-	ret |= lp5521_write(client, LP5521_REG_B_CNTRL, LP5521_CURRENT_4m7);
-
-	/* Enable auto-powersave, set charge pump to auto, red to battery */
-	ret |= lp5521_write(client, LP5521_REG_MISC, 0x3c);
-
-	/* initialize all channels pwm to zero */
-	ret |= lp5521_write(client, LP5521_REG_R_PWM, 0);
-	ret |= lp5521_write(client, LP5521_REG_G_PWM, 0);
-	ret |= lp5521_write(client, LP5521_REG_B_PWM, 0);
-
-	/* Not much can be done about errors at this point */
-	return ret;
-}
-
-static int lp5521_load_program(struct lp5521_chip *chip, u8 *pattern)
-{
-	struct i2c_client *client = chip->client;
-	int ret = 0;
-
-	/* Enter load program mode for all led channels */
-	ret |= lp5521_write(client, LP5521_REG_OP_MODE, 0x15); /* 0001 0101 */
-	if (ret)
-		return ret;
-
-	if (chip->red)
-		ret |= i2c_smbus_write_i2c_block_data(client,
-						      LP5521_REG_R_PROG_MEM,
-						      LP5521_PROGRAM_LENGTH,
-						      pattern);
-	if (chip->green)
-		ret |= i2c_smbus_write_i2c_block_data(client,
-						      LP5521_REG_G_PROG_MEM,
-						      LP5521_PROGRAM_LENGTH,
-						      pattern);
-	if (chip->blue)
-		ret |= i2c_smbus_write_i2c_block_data(client,
-						      LP5521_REG_B_PROG_MEM,
-						      LP5521_PROGRAM_LENGTH,
-						      pattern);
-
-	return ret;
-}
-
-static int lp5521_run_program(struct lp5521_chip *chip)
-{
-	struct i2c_client *client = chip->client;
-	int ret;
-	u8 mask = 0xc0;
-	u8 exec_state = 0;
-	u8 enable_reg;
-
-	ret = lp5521_read(client, LP5521_REG_ENABLE, &enable_reg);
-	if (ret)
-		goto fail;
-
-	enable_reg &= mask;
-
-	/* set all active channels exec state to countinous run*/
-	exec_state |= (chip->red   << 5);
-	exec_state |= (chip->green << 3);
-	exec_state |= (chip->blue  << 1);
-
-	enable_reg |= exec_state;
-
-	ret |= lp5521_write(client, LP5521_REG_ENABLE, enable_reg);
-
-	/* set op-mode to run for active channels, disabled for others */
-	ret |= lp5521_write(client, LP5521_REG_OP_MODE, exec_state);
-
-fail:
-	return ret;
-}
-
-/*--------------------------------------------------------------*/
-/*			Sysfs interface				*/
-/*--------------------------------------------------------------*/
-
-static ssize_t show_active_channels(struct device *dev,
-			    struct device_attribute *attr,
-			    char *buf)
-{
-	struct lp5521_chip *chip = dev_get_drvdata(dev);
-	char channels[4];
-	int pos = 0;
-
-#ifdef LED_CONNECTED_WRONG
-	if (chip->blue)
-		pos += sprintf(channels + pos, "r");
-	if (chip->green)
-		pos += sprintf(channels + pos, "g");
-	if (chip->red)
-		pos += sprintf(channels + pos, "b");
-
-#else
-	if (chip->red)
-		pos += sprintf(channels + pos, "r");
-	if (chip->green)
-		pos += sprintf(channels + pos, "g");
-	if (chip->blue)
-		pos += sprintf(channels + pos, "b");
-#endif
-
-	channels[pos] = '\0';
-
-	return sprintf(buf, "%s\n", channels);
-}
-
-static ssize_t store_active_channels(struct device *dev,
-			     struct device_attribute *attr,
-			     const char *buf, size_t len)
-{
-	struct lp5521_chip *chip = dev_get_drvdata(dev);
-
-	chip->red = 0;
-	chip->green = 0;
-	chip->blue = 0;
-
-#ifdef LED_CONNECTED_WRONG
-	if (strchr(buf, 'r') != NULL)
-		chip->blue = 1;
-	if (strchr(buf, 'b') != NULL)
-		chip->red = 1;
-#else
-	if (strchr(buf, 'r') != NULL)
-		chip->red = 1;
-	if (strchr(buf, 'b') != NULL)
-		chip->blue = 1;
-#endif
-	if (strchr(buf, 'g') != NULL)
-		chip->green = 1;
-
-	return len;
-}
-
-static ssize_t show_color(struct device *dev,
-			    struct device_attribute *attr,
-			    char *buf)
-{
-	struct i2c_client *client = to_i2c_client(dev);
-	int ret = 0;
-	u8 r, g, b;
-
-	ret |= lp5521_read(client, LP5521_REG_R_PWM, &r);
-	ret |= lp5521_read(client, LP5521_REG_G_PWM, &g);
-	ret |= lp5521_read(client, LP5521_REG_B_PWM, &b);
-
-	if (ret)
-		return ret;
-
-	return sprintf(buf, "%.2x:%.2x:%.2x\n", r, g, b);
-}
-
-static ssize_t store_color(struct device *dev,
-			     struct device_attribute *attr,
-			     const char *buf, size_t len)
-{
-	struct i2c_client *client = to_i2c_client(dev);
-	struct lp5521_chip *chip = i2c_get_clientdata(client);
-	int ret;
-	unsigned r, g, b;
-
-
-	ret = sscanf(buf, "%2x:%2x:%2x", &r, &g, &b);
-	if (ret != 3)
-		return  -EINVAL;
-
-	mutex_lock(&chip->lock);
-
-	ret = lp5521_write(client, LP5521_REG_R_PWM, (u8)r);
-	ret = lp5521_write(client, LP5521_REG_G_PWM, (u8)g);
-	ret = lp5521_write(client, LP5521_REG_B_PWM, (u8)b);
-
-	mutex_unlock(&chip->lock);
-
-	return len;
-}
-
-static ssize_t store_load(struct device *dev,
-			     struct device_attribute *attr,
-			     const char *buf, size_t len)
-{
-	struct lp5521_chip *chip = dev_get_drvdata(dev);
-	int  ret, nrchars, offset = 0, i = 0;
-	char c[3];
-	unsigned cmd;
-	u8 pattern[LP5521_PROGRAM_LENGTH] = {0};
-
-	while ((offset < len - 1) && (i < LP5521_PROGRAM_LENGTH)) {
-
-		/* separate sscanfs because length is working only for %s */
-		ret = sscanf(buf + offset, "%2s%n ", c, &nrchars);
-		ret = sscanf(c, "%2x", &cmd);
-		if (ret != 1)
-			goto fail;
-		pattern[i] = (u8)cmd;
-
-		offset += nrchars;
-		i++;
-	}
-
-	/* pattern commands are always two bytes long */
-	if (i % 2)
-		goto fail;
-
-	mutex_lock(&chip->lock);
-
-	ret = lp5521_load_program(chip, pattern);
-	mutex_unlock(&chip->lock);
-
-	if (ret) {
-		dev_err(dev, "lp5521 failed loading pattern\n");
-		return ret;
-	}
-
-	return len;
-fail:
-	dev_err(dev, "lp5521 wrong pattern format\n");
-	return -EINVAL;
-}
-
-static ssize_t show_mode(struct device *dev,
-			 struct device_attribute *attr,
-			 char *buf)
-{
-	struct lp5521_chip *chip = dev_get_drvdata(dev);
-
-	return sprintf(buf, "%s\n", chip->mode);
-}
-
-static ssize_t store_mode(struct device *dev,
-			  struct device_attribute *attr,
-			  const char *buf, size_t len)
-{
-	struct lp5521_chip *chip = dev_get_drvdata(dev);
-
-	mutex_lock(&chip->lock);
-
-	if (!strncmp(buf, "run", 3))
-		lp5521_set_mode(chip, LP5521_MODE_RUN);
-	else if (!strncmp(buf, "load", 4))
-		lp5521_set_mode(chip, LP5521_MODE_LOAD);
-	else if (!strncmp(buf, "direct", 6))
-		lp5521_set_mode(chip, LP5521_MODE_DIRECT_CONTROL);
-
-	mutex_unlock(&chip->lock);
-
-	return len;
-}
-
-static ssize_t show_current(struct device *dev,
-			    struct device_attribute *attr,
-			    char *buf)
-{
-	struct i2c_client *client = to_i2c_client(dev);
-	int ret = 0;
-	u8 r_curr, g_curr, b_curr;
-
-	ret |= lp5521_read(client, LP5521_REG_R_CNTRL, &r_curr);
-	ret |= lp5521_read(client, LP5521_REG_G_CNTRL, &g_curr);
-	ret |= lp5521_read(client, LP5521_REG_B_CNTRL, &b_curr);
-
-	if (ret)
-		return ret;
-
-	r_curr = r_curr >> 4;
-	g_curr = g_curr >> 4;
-	b_curr = b_curr >> 4;
-
-	if (r_curr == g_curr && g_curr == b_curr)
-		return sprintf(buf, "%x\n", r_curr);
-	else
-		return sprintf(buf, "%x %x %x\n", r_curr, g_curr, b_curr);
-}
-
-static ssize_t store_current(struct device *dev,
-			     struct device_attribute *attr,
-			     const char *buf, size_t len)
-{
-	struct lp5521_chip *chip = dev_get_drvdata(dev);
-	struct i2c_client *client = chip->client;
-	int ret;
-	unsigned curr;
-
-	ret = sscanf(buf, "%1x", &curr);
-	if (ret != 1)
-		return  -EINVAL;
-
-	/* current level is determined by the 4 upper bits, rest is ones */
-	curr = (curr << 4) | 0x0f;
-
-	mutex_lock(&chip->lock);
-
-	ret |= lp5521_write(client, LP5521_REG_R_CNTRL, (u8)curr);
-	ret |= lp5521_write(client, LP5521_REG_G_CNTRL, (u8)curr);
-	ret |= lp5521_write(client, LP5521_REG_B_CNTRL, (u8)curr);
-
-	mutex_unlock(&chip->lock);
-
-	return len;
-}
-
-static DEVICE_ATTR(color, S_IRUGO | S_IWUGO, show_color, store_color);
-static DEVICE_ATTR(load, S_IWUGO, NULL, store_load);
-static DEVICE_ATTR(mode, S_IRUGO | S_IWUGO, show_mode, store_mode);
-static DEVICE_ATTR(active_channels, S_IRUGO | S_IWUGO,
-		   show_active_channels, store_active_channels);
-static DEVICE_ATTR(led_current, S_IRUGO | S_IWUGO, show_current, store_current);
-
-static int lp5521_register_sysfs(struct i2c_client *client)
-{
-	struct device *dev = &client->dev;
-	int ret;
-
-	ret = device_create_file(dev, &dev_attr_color);
-	if (ret)
-		goto fail1;
-	ret = device_create_file(dev, &dev_attr_load);
-	if (ret)
-		goto fail2;
-	ret = device_create_file(dev, &dev_attr_active_channels);
-	if (ret)
-		goto fail3;
-	ret = device_create_file(dev, &dev_attr_mode);
-	if (ret)
-		goto fail4;
-	ret = device_create_file(dev, &dev_attr_led_current);
-	if (ret)
-		goto fail5;
-	return 0;
-
-fail5:
-	device_remove_file(dev, &dev_attr_mode);
-fail4:
-	device_remove_file(dev, &dev_attr_active_channels);
-fail3:
-	device_remove_file(dev, &dev_attr_load);
-fail2:
-	device_remove_file(dev, &dev_attr_color);
-fail1:
-	return ret;
-}
-
-static void lp5521_unregister_sysfs(struct i2c_client *client)
-{
-	struct lp5521_chip *chip = i2c_get_clientdata(client);
-	struct device *dev = &client->dev;
-
-	device_remove_file(dev, &dev_attr_led_current);
-	device_remove_file(dev, &dev_attr_mode);
-	device_remove_file(dev, &dev_attr_active_channels);
-	device_remove_file(dev, &dev_attr_color);
-
-	if (!strcmp(chip->mode, LP5521_MODE_LOAD))
-		device_remove_file(dev, &dev_attr_load);
-}
-
-/*--------------------------------------------------------------*/
-/*			Set chip operating mode			*/
-/*--------------------------------------------------------------*/
-
-static int lp5521_set_mode(struct lp5521_chip *chip, char *mode)
-{
-	struct i2c_client *client = chip->client ;
-	int ret = 0;
-
-	/* if in that mode already do nothing, except for run */
-	if (!strcmp(mode, chip->mode) && strcmp(mode, LP5521_MODE_RUN))
-		return 0;
-
-	if (!strcmp(mode, LP5521_MODE_RUN))
-		ret = lp5521_run_program(chip);
-
-	if (!strcmp(mode, LP5521_MODE_LOAD))
-		ret |= lp5521_write(client, LP5521_REG_OP_MODE, 0x15);
-
-	if (!strcmp(mode, LP5521_MODE_DIRECT_CONTROL))
-		ret |= lp5521_write(client, LP5521_REG_OP_MODE, 0x3F);
-
-	chip->mode = mode;
-
-	return ret;
-}
-
-/*--------------------------------------------------------------*/
-/*			Probe, Attach, Remove			*/
-/*--------------------------------------------------------------*/
-static struct i2c_driver lp5521_driver;
-
-static int lp5521_probe(struct i2c_client *client,
-		const struct i2c_device_id *id)
-{
-	struct lp5521_chip *chip;
-	int ret = 0;
-
-	chip = kzalloc(sizeof(*chip), GFP_KERNEL);
-	if (!chip)
-		return -ENOMEM;
-
-	chip->client	= client;
-	strncpy(client->name, LP5521_DRIVER_NAME, I2C_NAME_SIZE);
-	i2c_set_clientdata(client, chip);
-
-	mutex_init(&chip->lock);
-
-	ret = lp5521_configure(client);
-	if (ret < 0) {
-		dev_err(&client->dev, "lp5521 error configuring chip \n");
-		goto fail1;
-	}
-
-	/* Set default values */
-	chip->mode	= LP5521_MODE_DIRECT_CONTROL;
-	chip->red	= 1;
-	chip->green	= 1;
-	chip->blue	= 1;
-
-	ret = lp5521_register_sysfs(client);
-	if (ret)
-		dev_err(&client->dev, "lp5521 registering sysfs failed \n");
-
-	return ret;
-
-fail1:
-	kfree(chip);
-	return ret;
-}
-
-static int lp5521_remove(struct i2c_client *client)
-{
-	struct lp5521_chip *chip = i2c_get_clientdata(client);
-
-	lp5521_unregister_sysfs(client);
-	kfree(chip);
-
-	return 0;
-}
-
-static const struct i2c_device_id lp5521_id[] = {
-	{ LP5521_DRIVER_NAME, 0},
-	{ },
-};
-MODULE_DEVICE_TABLE(i2c, lp5521_id);
-
-static struct i2c_driver lp5521_driver = {
-	.driver = {
-		.name	= LP5521_DRIVER_NAME,
-	},
-	.probe		= lp5521_probe,
-	.remove		= __devexit_p(lp5521_remove),
-	.id_table	= lp5521_id,
-};
-
-static int __init lp5521_init(void)
-{
-	return i2c_add_driver(&lp5521_driver);
-}
-
-static void __exit lp5521_exit(void)
-{
-	i2c_del_driver(&lp5521_driver);
-}
-
-MODULE_AUTHOR("Mathias Nyman <mathias.nyman@nokia.com>");
-MODULE_DESCRIPTION("lp5521 LED driver");
-MODULE_LICENSE("GPL");
-
-module_init(lp5521_init);
-module_exit(lp5521_exit);
