[PATCH 1/3] Remove lp5521 device from drivers/i2c to drivers/leds
Matt Hsu
matt_hsu at openmoko.org
Sat Jan 10 18:25:22 CET 2009
Signed-off-by: Matt Hsu <matt_hsu at openmoko.org>
---
drivers/i2c/chips/Kconfig | 6 -
drivers/i2c/chips/Makefile | 1 -
drivers/i2c/chips/lp5521.c | 609 --------------------------------------------
drivers/leds/Kconfig | 7 +
drivers/leds/Makefile | 1 +
drivers/leds/leds-lp5521.c | 609 ++++++++++++++++++++++++++++++++++++++++++++
6 files changed, 617 insertions(+), 616 deletions(-)
delete mode 100644 drivers/i2c/chips/lp5521.c
create mode 100644 drivers/leds/leds-lp5521.c
diff --git a/drivers/i2c/chips/Kconfig b/drivers/i2c/chips/Kconfig
index afb38f5..422ee3f 100644
--- a/drivers/i2c/chips/Kconfig
+++ b/drivers/i2c/chips/Kconfig
@@ -225,10 +225,4 @@ config PCA9632
This driver can also be built as a module. If so, the module
will be called pca9632.
-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.
endmenu
diff --git a/drivers/i2c/chips/Makefile b/drivers/i2c/chips/Makefile
index 656bb2b..b0dc12e 100644
--- a/drivers/i2c/chips/Makefile
+++ b/drivers/i2c/chips/Makefile
@@ -27,7 +27,6 @@ obj-$(CONFIG_SENSORS_TSL2550) += tsl2550.o
obj-$(CONFIG_MCU_MPC8349EMITX) += mcu_mpc8349emitx.o
obj-$(CONFIG_SENSORS_TSL256X) += tsl256x.o
obj-$(CONFIG_PCA9632) += pca9632.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 33dca66..0000000
--- a/drivers/i2c/chips/lp5521.c
+++ /dev/null
@@ -1,609 +0,0 @@
-/*
- * drivers/i2c/chips/lp5521.c
- *
- * Copyright (C) 2007 Nokia Corporation
- *
- * Written by Mathias Nyman <mathias.nyman at nokia.com>
- * Matt Hsu <matt_hsu at openmoko.org>
- *
- * 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 <linux/lp5521.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;
-}
-
-#ifdef MODULE
-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);
-}
-#endif
-
-/*--------------------------------------------------------------*/
-/* 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;
-
-#ifdef CONFIG_PM
-static int lp5521_suspend(struct device *dev, pm_message_t state)
-{
- /* FIXME: Not implemented
- * Here we could upload firmware to perform
- * any scenarios we want and save registers.
- */
- return 0;
-}
-
-static int lp5521_resume(struct device *dev)
-{
- /* FIXME: Not implemented */
- return 0;
-}
-#else
-#define lp5521_suspend NULL
-#define lp5521_resume NULL
-#endif
-
-static int lp5521_probe(struct i2c_client *client, const struct i2c_device_id *id)
-{
- struct lp5521_chip *chip;
- int ret = 0;
- struct lp5521_platform_data *pdata = client->dev.platform_data;
-
- 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);
-
- /* enter start-up mode */
- (pdata->ext_enable)(1);
-
- 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;
-}
-
-#ifdef MODULE
-static int lp5521_remove(struct i2c_client *client)
-{
- struct lp5521_chip *chip = i2c_get_clientdata(client);
-
- lp5521_unregister_sysfs(client);
- kfree(chip);
-
- return 0;
-}
-#endif
-
-static struct i2c_driver lp5521_driver = {
- .driver = {
- .name = LP5521_DRIVER_NAME,
- .suspend = lp5521_suspend,
- .resume = lp5521_resume,
- },
- .probe = lp5521_probe,
- .remove = __exit_p(lp5521_remove),
-};
-
-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 at nokia.com>");
-MODULE_DESCRIPTION("lp5521 LED driver");
-MODULE_LICENSE("GPL");
-
-module_init(lp5521_init);
-module_exit(lp5521_exit);
diff --git a/drivers/leds/Kconfig b/drivers/leds/Kconfig
index 4435859..022e78c 100644
--- a/drivers/leds/Kconfig
+++ b/drivers/leds/Kconfig
@@ -177,6 +177,13 @@ config LEDS_NEO1973_GTA02
help
This option enables support for the LEDs on the FIC Neo1973.
+config LEDS_LP5521
+ tristate "LED Support for LP5521 LED I2C chip"
+ depends on LEDS_CLASS && I2C
+ help
+ If you say yes here you get support for the National Semiconductor
+ LP5521 LED driver.
+
comment "LED Triggers"
config LEDS_TRIGGERS
diff --git a/drivers/leds/Makefile b/drivers/leds/Makefile
index 40bd128..ece3b56 100644
--- a/drivers/leds/Makefile
+++ b/drivers/leds/Makefile
@@ -25,6 +25,7 @@ obj-$(CONFIG_LEDS_DA903X) += leds-da903x.o
obj-$(CONFIG_LEDS_HP_DISK) += leds-hp-disk.o
obj-$(CONFIG_LEDS_NEO1973_VIBRATOR) += leds-neo1973-vibrator.o
obj-$(CONFIG_LEDS_NEO1973_GTA02) += leds-neo1973-gta02.o
+obj-$(CONFIG_LEDS_LP5521) += leds-lp5521.o
# LED Triggers
obj-$(CONFIG_LEDS_TRIGGER_TIMER) += ledtrig-timer.o
diff --git a/drivers/leds/leds-lp5521.c b/drivers/leds/leds-lp5521.c
new file mode 100644
index 0000000..8b0e5f6
--- /dev/null
+++ b/drivers/leds/leds-lp5521.c
@@ -0,0 +1,609 @@
+/*
+ * drivers/leds/leds-lp5521.c
+ *
+ * Copyright (C) 2007 Nokia Corporation
+ *
+ * Written by Mathias Nyman <mathias.nyman at nokia.com>
+ * Matt Hsu <matt_hsu at openmoko.org>
+ *
+ * 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 <linux/lp5521.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;
+}
+
+#ifdef MODULE
+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);
+}
+#endif
+
+/*--------------------------------------------------------------*/
+/* 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;
+
+#ifdef CONFIG_PM
+static int lp5521_suspend(struct device *dev, pm_message_t state)
+{
+ /* FIXME: Not implemented
+ * Here we could upload firmware to perform
+ * any scenarios we want and save registers.
+ */
+ return 0;
+}
+
+static int lp5521_resume(struct device *dev)
+{
+ /* FIXME: Not implemented */
+ return 0;
+}
+#else
+#define lp5521_suspend NULL
+#define lp5521_resume NULL
+#endif
+
+static int lp5521_probe(struct i2c_client *client, const struct i2c_device_id *id)
+{
+ struct lp5521_chip *chip;
+ int ret = 0;
+ struct lp5521_platform_data *pdata = client->dev.platform_data;
+
+ 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);
+
+ /* enter start-up mode */
+ (pdata->ext_enable)(1);
+
+ 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;
+}
+
+#ifdef MODULE
+static int lp5521_remove(struct i2c_client *client)
+{
+ struct lp5521_chip *chip = i2c_get_clientdata(client);
+
+ lp5521_unregister_sysfs(client);
+ kfree(chip);
+
+ return 0;
+}
+#endif
+
+static struct i2c_driver lp5521_driver = {
+ .driver = {
+ .name = LP5521_DRIVER_NAME,
+ .suspend = lp5521_suspend,
+ .resume = lp5521_resume,
+ },
+ .probe = lp5521_probe,
+ .remove = __exit_p(lp5521_remove),
+};
+
+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 at nokia.com>");
+MODULE_DESCRIPTION("lp5521 LED driver");
+MODULE_LICENSE("GPL");
+
+module_init(lp5521_init);
+module_exit(lp5521_exit);
--
1.5.6.5
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