15054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite/* 25054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite * leds-lp3944.c - driver for National Semiconductor LP3944 Funlight Chip 35054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite * 45054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite * Copyright (C) 2009 Antonio Ospite <ospite@studenti.unina.it> 55054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite * 65054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite * This program is free software; you can redistribute it and/or modify 75054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite * it under the terms of the GNU General Public License version 2 as 85054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite * published by the Free Software Foundation. 95054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite * 105054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite */ 115054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite 125054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite/* 135054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite * I2C driver for National Semiconductor LP3944 Funlight Chip 145054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite * http://www.national.com/pf/LP/LP3944.html 155054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite * 165054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite * This helper chip can drive up to 8 leds, with two programmable DIM modes; 175054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite * it could even be used as a gpio expander but this driver assumes it is used 185054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite * as a led controller. 195054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite * 205054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite * The DIM modes are used to set _blink_ patterns for leds, the pattern is 215054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite * specified supplying two parameters: 225054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite * - period: from 0s to 1.6s 235054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite * - duty cycle: percentage of the period the led is on, from 0 to 100 245054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite * 255054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite * LP3944 can be found on Motorola A910 smartphone, where it drives the rgb 265054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite * leds, the camera flash light and the displays backlights. 275054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite */ 285054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite 295054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite#include <linux/module.h> 305054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite#include <linux/i2c.h> 315a0e3ad6af8660be21ca98a971cd00f331318c05Tejun Heo#include <linux/slab.h> 325054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite#include <linux/leds.h> 335054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite#include <linux/mutex.h> 345054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite#include <linux/workqueue.h> 355054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite#include <linux/leds-lp3944.h> 365054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite 375054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite/* Read Only Registers */ 385054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite#define LP3944_REG_INPUT1 0x00 /* LEDs 0-7 InputRegister (Read Only) */ 395054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite#define LP3944_REG_REGISTER1 0x01 /* None (Read Only) */ 405054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite 415054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite#define LP3944_REG_PSC0 0x02 /* Frequency Prescaler 0 (R/W) */ 425054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite#define LP3944_REG_PWM0 0x03 /* PWM Register 0 (R/W) */ 435054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite#define LP3944_REG_PSC1 0x04 /* Frequency Prescaler 1 (R/W) */ 445054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite#define LP3944_REG_PWM1 0x05 /* PWM Register 1 (R/W) */ 455054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite#define LP3944_REG_LS0 0x06 /* LEDs 0-3 Selector (R/W) */ 465054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite#define LP3944_REG_LS1 0x07 /* LEDs 4-7 Selector (R/W) */ 475054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite 485054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite/* These registers are not used to control leds in LP3944, they can store 495054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite * arbitrary values which the chip will ignore. 505054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite */ 515054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite#define LP3944_REG_REGISTER8 0x08 525054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite#define LP3944_REG_REGISTER9 0x09 535054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite 545054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite#define LP3944_DIM0 0 555054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite#define LP3944_DIM1 1 565054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite 575054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite/* period in ms */ 585054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite#define LP3944_PERIOD_MIN 0 595054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite#define LP3944_PERIOD_MAX 1600 605054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite 615054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite/* duty cycle is a percentage */ 625054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite#define LP3944_DUTY_CYCLE_MIN 0 635054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite#define LP3944_DUTY_CYCLE_MAX 100 645054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite 655054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite#define ldev_to_led(c) container_of(c, struct lp3944_led_data, ldev) 665054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite 675054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite/* Saved data */ 685054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospitestruct lp3944_led_data { 695054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite u8 id; 705054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite enum lp3944_type type; 715054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite enum lp3944_status status; 725054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite struct led_classdev ldev; 735054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite struct i2c_client *client; 745054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite struct work_struct work; 755054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite}; 765054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite 775054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospitestruct lp3944_data { 785054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite struct mutex lock; 795054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite struct i2c_client *client; 805054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite struct lp3944_led_data leds[LP3944_LEDS_MAX]; 815054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite}; 825054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite 835054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospitestatic int lp3944_reg_read(struct i2c_client *client, u8 reg, u8 *value) 845054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite{ 855054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite int tmp; 865054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite 875054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite tmp = i2c_smbus_read_byte_data(client, reg); 885054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite if (tmp < 0) 895054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite return -EINVAL; 905054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite 915054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite *value = tmp; 925054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite 935054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite return 0; 945054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite} 955054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite 965054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospitestatic int lp3944_reg_write(struct i2c_client *client, u8 reg, u8 value) 975054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite{ 985054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite return i2c_smbus_write_byte_data(client, reg, value); 995054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite} 1005054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite 1015054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite/** 1025054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite * Set the period for DIM status 1035054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite * 1045054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite * @client: the i2c client 1055054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite * @dim: either LP3944_DIM0 or LP3944_DIM1 1065054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite * @period: period of a blink, that is a on/off cycle, expressed in ms. 1075054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite */ 1085054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospitestatic int lp3944_dim_set_period(struct i2c_client *client, u8 dim, u16 period) 1095054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite{ 1105054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite u8 psc_reg; 1115054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite u8 psc_value; 1125054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite int err; 1135054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite 1145054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite if (dim == LP3944_DIM0) 1155054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite psc_reg = LP3944_REG_PSC0; 1165054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite else if (dim == LP3944_DIM1) 1175054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite psc_reg = LP3944_REG_PSC1; 1185054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite else 1195054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite return -EINVAL; 1205054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite 1215054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite /* Convert period to Prescaler value */ 1225054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite if (period > LP3944_PERIOD_MAX) 1235054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite return -EINVAL; 1245054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite 1255054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite psc_value = (period * 255) / LP3944_PERIOD_MAX; 1265054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite 1275054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite err = lp3944_reg_write(client, psc_reg, psc_value); 1285054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite 1295054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite return err; 1305054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite} 1315054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite 1325054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite/** 1335054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite * Set the duty cycle for DIM status 1345054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite * 1355054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite * @client: the i2c client 1365054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite * @dim: either LP3944_DIM0 or LP3944_DIM1 1375054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite * @duty_cycle: percentage of a period during which a led is ON 1385054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite */ 1395054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospitestatic int lp3944_dim_set_dutycycle(struct i2c_client *client, u8 dim, 1405054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite u8 duty_cycle) 1415054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite{ 1425054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite u8 pwm_reg; 1435054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite u8 pwm_value; 1445054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite int err; 1455054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite 1465054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite if (dim == LP3944_DIM0) 1475054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite pwm_reg = LP3944_REG_PWM0; 1485054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite else if (dim == LP3944_DIM1) 1495054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite pwm_reg = LP3944_REG_PWM1; 1505054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite else 1515054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite return -EINVAL; 1525054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite 1535054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite /* Convert duty cycle to PWM value */ 1545054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite if (duty_cycle > LP3944_DUTY_CYCLE_MAX) 1555054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite return -EINVAL; 1565054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite 1575054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite pwm_value = (duty_cycle * 255) / LP3944_DUTY_CYCLE_MAX; 1585054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite 1595054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite err = lp3944_reg_write(client, pwm_reg, pwm_value); 1605054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite 1615054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite return err; 1625054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite} 1635054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite 1645054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite/** 1655054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite * Set the led status 1665054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite * 1675054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite * @led: a lp3944_led_data structure 1685054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite * @status: one of LP3944_LED_STATUS_OFF 1695054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite * LP3944_LED_STATUS_ON 1705054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite * LP3944_LED_STATUS_DIM0 1715054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite * LP3944_LED_STATUS_DIM1 1725054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite */ 1735054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospitestatic int lp3944_led_set(struct lp3944_led_data *led, u8 status) 1745054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite{ 1755054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite struct lp3944_data *data = i2c_get_clientdata(led->client); 1765054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite u8 id = led->id; 1775054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite u8 reg; 1785054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite u8 val = 0; 1795054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite int err; 1805054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite 1815054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite dev_dbg(&led->client->dev, "%s: %s, status before normalization:%d\n", 1825054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite __func__, led->ldev.name, status); 1835054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite 1845054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite switch (id) { 1855054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite case LP3944_LED0: 1865054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite case LP3944_LED1: 1875054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite case LP3944_LED2: 1885054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite case LP3944_LED3: 1895054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite reg = LP3944_REG_LS0; 1905054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite break; 1915054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite case LP3944_LED4: 1925054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite case LP3944_LED5: 1935054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite case LP3944_LED6: 1945054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite case LP3944_LED7: 1955054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite id -= LP3944_LED4; 1965054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite reg = LP3944_REG_LS1; 1975054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite break; 1985054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite default: 1995054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite return -EINVAL; 2005054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite } 2015054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite 2025054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite if (status > LP3944_LED_STATUS_DIM1) 2035054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite return -EINVAL; 2045054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite 2055054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite /* invert only 0 and 1, leave unchanged the other values, 2065054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite * remember we are abusing status to set blink patterns 2075054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite */ 2085054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite if (led->type == LP3944_LED_TYPE_LED_INVERTED && status < 2) 2095054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite status = 1 - status; 2105054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite 2115054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite mutex_lock(&data->lock); 2125054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite lp3944_reg_read(led->client, reg, &val); 2135054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite 2145054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite val &= ~(LP3944_LED_STATUS_MASK << (id << 1)); 2155054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite val |= (status << (id << 1)); 2165054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite 2175054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite dev_dbg(&led->client->dev, "%s: %s, reg:%d id:%d status:%d val:%#x\n", 2185054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite __func__, led->ldev.name, reg, id, status, val); 2195054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite 2205054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite /* set led status */ 2215054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite err = lp3944_reg_write(led->client, reg, val); 2225054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite mutex_unlock(&data->lock); 2235054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite 2245054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite return err; 2255054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite} 2265054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite 2275054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospitestatic int lp3944_led_set_blink(struct led_classdev *led_cdev, 2285054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite unsigned long *delay_on, 2295054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite unsigned long *delay_off) 2305054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite{ 2315054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite struct lp3944_led_data *led = ldev_to_led(led_cdev); 2325054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite u16 period; 2335054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite u8 duty_cycle; 2345054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite int err; 2355054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite 2365054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite /* units are in ms */ 2375054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite if (*delay_on + *delay_off > LP3944_PERIOD_MAX) 2385054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite return -EINVAL; 2395054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite 2405054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite if (*delay_on == 0 && *delay_off == 0) { 2415054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite /* Special case: the leds subsystem requires a default user 2425054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite * friendly blink pattern for the LED. Let's blink the led 2435054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite * slowly (1Hz). 2445054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite */ 2455054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite *delay_on = 500; 2465054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite *delay_off = 500; 2475054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite } 2485054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite 2495054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite period = (*delay_on) + (*delay_off); 2505054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite 2515054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite /* duty_cycle is the percentage of period during which the led is ON */ 2525054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite duty_cycle = 100 * (*delay_on) / period; 2535054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite 2545054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite /* invert duty cycle for inverted leds, this has the same effect of 2555054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite * swapping delay_on and delay_off 2565054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite */ 2575054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite if (led->type == LP3944_LED_TYPE_LED_INVERTED) 2585054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite duty_cycle = 100 - duty_cycle; 2595054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite 2605054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite /* NOTE: using always the first DIM mode, this means that all leds 2615054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite * will have the same blinking pattern. 2625054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite * 2635054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite * We could find a way later to have two leds blinking in hardware 2645054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite * with different patterns at the same time, falling back to software 2655054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite * control for the other ones. 2665054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite */ 2675054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite err = lp3944_dim_set_period(led->client, LP3944_DIM0, period); 2685054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite if (err) 2695054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite return err; 2705054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite 2715054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite err = lp3944_dim_set_dutycycle(led->client, LP3944_DIM0, duty_cycle); 2725054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite if (err) 2735054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite return err; 2745054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite 2755054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite dev_dbg(&led->client->dev, "%s: OK hardware accelerated blink!\n", 2765054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite __func__); 2775054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite 2785054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite led->status = LP3944_LED_STATUS_DIM0; 2795054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite schedule_work(&led->work); 2805054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite 2815054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite return 0; 2825054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite} 2835054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite 2845054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospitestatic void lp3944_led_set_brightness(struct led_classdev *led_cdev, 2855054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite enum led_brightness brightness) 2865054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite{ 2875054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite struct lp3944_led_data *led = ldev_to_led(led_cdev); 2885054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite 2895054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite dev_dbg(&led->client->dev, "%s: %s, %d\n", 2905054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite __func__, led_cdev->name, brightness); 2915054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite 2925054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite led->status = brightness; 2935054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite schedule_work(&led->work); 2945054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite} 2955054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite 2965054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospitestatic void lp3944_led_work(struct work_struct *work) 2975054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite{ 2985054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite struct lp3944_led_data *led; 2995054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite 3005054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite led = container_of(work, struct lp3944_led_data, work); 3015054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite lp3944_led_set(led, led->status); 3025054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite} 3035054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite 3045054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospitestatic int lp3944_configure(struct i2c_client *client, 3055054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite struct lp3944_data *data, 3065054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite struct lp3944_platform_data *pdata) 3075054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite{ 3085054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite int i, err = 0; 3095054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite 3105054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite for (i = 0; i < pdata->leds_size; i++) { 3115054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite struct lp3944_led *pled = &pdata->leds[i]; 3125054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite struct lp3944_led_data *led = &data->leds[i]; 3135054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite led->client = client; 3145054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite led->id = i; 3155054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite 3165054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite switch (pled->type) { 3175054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite 3185054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite case LP3944_LED_TYPE_LED: 3195054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite case LP3944_LED_TYPE_LED_INVERTED: 3205054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite led->type = pled->type; 3215054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite led->status = pled->status; 3225054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite led->ldev.name = pled->name; 3235054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite led->ldev.max_brightness = 1; 3245054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite led->ldev.brightness_set = lp3944_led_set_brightness; 3255054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite led->ldev.blink_set = lp3944_led_set_blink; 3265054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite led->ldev.flags = LED_CORE_SUSPENDRESUME; 3275054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite 3285054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite INIT_WORK(&led->work, lp3944_led_work); 3295054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite err = led_classdev_register(&client->dev, &led->ldev); 3305054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite if (err < 0) { 3315054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite dev_err(&client->dev, 3325054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite "couldn't register LED %s\n", 3335054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite led->ldev.name); 3345054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite goto exit; 3355054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite } 3365054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite 3375054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite /* to expose the default value to userspace */ 3385054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite led->ldev.brightness = led->status; 3395054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite 3405054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite /* Set the default led status */ 3415054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite err = lp3944_led_set(led, led->status); 3425054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite if (err < 0) { 3435054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite dev_err(&client->dev, 3445054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite "%s couldn't set STATUS %d\n", 3455054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite led->ldev.name, led->status); 3465054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite goto exit; 3475054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite } 3485054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite break; 3495054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite 3505054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite case LP3944_LED_TYPE_NONE: 3515054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite default: 3525054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite break; 3535054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite 3545054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite } 3555054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite } 3565054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite return 0; 3575054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite 3585054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospiteexit: 3595054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite if (i > 0) 3605054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite for (i = i - 1; i >= 0; i--) 3615054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite switch (pdata->leds[i].type) { 3625054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite 3635054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite case LP3944_LED_TYPE_LED: 3645054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite case LP3944_LED_TYPE_LED_INVERTED: 3655054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite led_classdev_unregister(&data->leds[i].ldev); 3665054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite cancel_work_sync(&data->leds[i].work); 3675054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite break; 3685054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite 3695054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite case LP3944_LED_TYPE_NONE: 3705054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite default: 3715054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite break; 3725054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite } 3735054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite 3745054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite return err; 3755054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite} 3765054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite 3775054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospitestatic int __devinit lp3944_probe(struct i2c_client *client, 3785054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite const struct i2c_device_id *id) 3795054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite{ 3805054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite struct lp3944_platform_data *lp3944_pdata = client->dev.platform_data; 3815054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite struct lp3944_data *data; 3827e1ce34f25c984a93dc0a2d8c217f7f78516b376Axel Lin int err; 3835054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite 3845054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite if (lp3944_pdata == NULL) { 3855054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite dev_err(&client->dev, "no platform data\n"); 3865054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite return -EINVAL; 3875054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite } 3885054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite 3895054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite /* Let's see whether this adapter can support what we need. */ 3905054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite if (!i2c_check_functionality(client->adapter, 3915054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite I2C_FUNC_SMBUS_BYTE_DATA)) { 3925054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite dev_err(&client->dev, "insufficient functionality!\n"); 3935054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite return -ENODEV; 3945054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite } 3955054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite 3965054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite data = kzalloc(sizeof(struct lp3944_data), GFP_KERNEL); 3975054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite if (!data) 3985054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite return -ENOMEM; 3995054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite 4005054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite data->client = client; 4015054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite i2c_set_clientdata(client, data); 4025054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite 4035054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite mutex_init(&data->lock); 4045054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite 4057e1ce34f25c984a93dc0a2d8c217f7f78516b376Axel Lin err = lp3944_configure(client, data, lp3944_pdata); 4067e1ce34f25c984a93dc0a2d8c217f7f78516b376Axel Lin if (err < 0) { 4077e1ce34f25c984a93dc0a2d8c217f7f78516b376Axel Lin kfree(data); 4087e1ce34f25c984a93dc0a2d8c217f7f78516b376Axel Lin return err; 4097e1ce34f25c984a93dc0a2d8c217f7f78516b376Axel Lin } 4105054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite 4117e1ce34f25c984a93dc0a2d8c217f7f78516b376Axel Lin dev_info(&client->dev, "lp3944 enabled\n"); 4125054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite return 0; 4135054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite} 4145054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite 4155054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospitestatic int __devexit lp3944_remove(struct i2c_client *client) 4165054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite{ 4175054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite struct lp3944_platform_data *pdata = client->dev.platform_data; 4185054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite struct lp3944_data *data = i2c_get_clientdata(client); 4195054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite int i; 4205054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite 4215054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite for (i = 0; i < pdata->leds_size; i++) 4225054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite switch (data->leds[i].type) { 4235054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite case LP3944_LED_TYPE_LED: 4245054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite case LP3944_LED_TYPE_LED_INVERTED: 4255054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite led_classdev_unregister(&data->leds[i].ldev); 4265054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite cancel_work_sync(&data->leds[i].work); 4275054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite break; 4285054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite 4295054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite case LP3944_LED_TYPE_NONE: 4305054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite default: 4315054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite break; 4325054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite } 4335054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite 4345054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite kfree(data); 4355054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite 4365054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite return 0; 4375054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite} 4385054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite 4395054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite/* lp3944 i2c driver struct */ 4405054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospitestatic const struct i2c_device_id lp3944_id[] = { 4415054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite {"lp3944", 0}, 4425054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite {} 4435054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite}; 4445054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite 4455054d39e327f76df022163a2ebd02e444c5d65f9Antonio OspiteMODULE_DEVICE_TABLE(i2c, lp3944_id); 4465054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite 4475054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospitestatic struct i2c_driver lp3944_driver = { 4485054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite .driver = { 4495054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite .name = "lp3944", 4505054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite }, 4515054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite .probe = lp3944_probe, 4525054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite .remove = __devexit_p(lp3944_remove), 4535054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite .id_table = lp3944_id, 4545054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite}; 4555054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite 45609a0d183ef3d310ee9d0b835d9db741fda9d6d46Axel Linmodule_i2c_driver(lp3944_driver); 4575054d39e327f76df022163a2ebd02e444c5d65f9Antonio Ospite 4585054d39e327f76df022163a2ebd02e444c5d65f9Antonio OspiteMODULE_AUTHOR("Antonio Ospite <ospite@studenti.unina.it>"); 4595054d39e327f76df022163a2ebd02e444c5d65f9Antonio OspiteMODULE_DESCRIPTION("LP3944 Fun Light Chip"); 4605054d39e327f76df022163a2ebd02e444c5d65f9Antonio OspiteMODULE_LICENSE("GPL"); 461