* lp5523.c - LP5523 LED Driver
*
* Copyright (C) 2010 Nokia Corporation
+ * Copyright (C) 2012 Texas Instruments
*
* Contact: Samu Onkalo <samu.p.onkalo@nokia.com>
+ * Milo(Woogyom) Kim <milo.kim@ti.com>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* 02110-1301 USA
*/
-#include <linux/module.h>
-#include <linux/init.h>
-#include <linux/i2c.h>
-#include <linux/mutex.h>
-#include <linux/gpio.h>
-#include <linux/interrupt.h>
#include <linux/delay.h>
-#include <linux/ctype.h>
-#include <linux/spinlock.h>
-#include <linux/wait.h>
+#include <linux/firmware.h>
+#include <linux/i2c.h>
+#include <linux/init.h>
#include <linux/leds.h>
-#include <linux/leds-lp5523.h>
-#include <linux/workqueue.h>
+#include <linux/module.h>
+#include <linux/mutex.h>
+#include <linux/platform_data/leds-lp55xx.h>
#include <linux/slab.h>
+#include "leds-lp55xx-common.h"
+
+#define LP5523_PROGRAM_LENGTH 32
+#define LP5523_MAX_LEDS 9
+
+/* Registers */
#define LP5523_REG_ENABLE 0x00
#define LP5523_REG_OP_MODE 0x01
-#define LP5523_REG_RATIOMETRIC_MSB 0x02
-#define LP5523_REG_RATIOMETRIC_LSB 0x03
#define LP5523_REG_ENABLE_LEDS_MSB 0x04
#define LP5523_REG_ENABLE_LEDS_LSB 0x05
-#define LP5523_REG_LED_CNTRL_BASE 0x06
#define LP5523_REG_LED_PWM_BASE 0x16
#define LP5523_REG_LED_CURRENT_BASE 0x26
#define LP5523_REG_CONFIG 0x36
-#define LP5523_REG_CHANNEL1_PC 0x37
-#define LP5523_REG_CHANNEL2_PC 0x38
-#define LP5523_REG_CHANNEL3_PC 0x39
-#define LP5523_REG_STATUS 0x3a
-#define LP5523_REG_GPO 0x3b
-#define LP5523_REG_VARIABLE 0x3c
-#define LP5523_REG_RESET 0x3d
-#define LP5523_REG_TEMP_CTRL 0x3e
-#define LP5523_REG_TEMP_READ 0x3f
-#define LP5523_REG_TEMP_WRITE 0x40
+#define LP5523_REG_STATUS 0x3A
+#define LP5523_REG_RESET 0x3D
#define LP5523_REG_LED_TEST_CTRL 0x41
#define LP5523_REG_LED_TEST_ADC 0x42
-#define LP5523_REG_ENG1_VARIABLE 0x45
-#define LP5523_REG_ENG2_VARIABLE 0x46
-#define LP5523_REG_ENG3_VARIABLE 0x47
-#define LP5523_REG_MASTER_FADER1 0x48
-#define LP5523_REG_MASTER_FADER2 0x49
-#define LP5523_REG_MASTER_FADER3 0x4a
-#define LP5523_REG_CH1_PROG_START 0x4c
-#define LP5523_REG_CH2_PROG_START 0x4d
-#define LP5523_REG_CH3_PROG_START 0x4e
-#define LP5523_REG_PROG_PAGE_SEL 0x4f
+#define LP5523_REG_PROG_PAGE_SEL 0x4F
#define LP5523_REG_PROG_MEM 0x50
-#define LP5523_CMD_LOAD 0x15 /* 00010101 */
-#define LP5523_CMD_RUN 0x2a /* 00101010 */
-#define LP5523_CMD_DISABLED 0x00 /* 00000000 */
-
+/* Bit description in registers */
#define LP5523_ENABLE 0x40
#define LP5523_AUTO_INC 0x40
#define LP5523_PWR_SAVE 0x20
#define LP5523_PWM_PWR_SAVE 0x04
-#define LP5523_CP_1 0x08
-#define LP5523_CP_1_5 0x10
#define LP5523_CP_AUTO 0x18
-#define LP5523_INT_CLK 0x01
#define LP5523_AUTO_CLK 0x02
+
#define LP5523_EN_LEDTEST 0x80
#define LP5523_LEDTEST_DONE 0x80
-
-#define LP5523_DEFAULT_CURRENT 50 /* microAmps */
-#define LP5523_PROGRAM_LENGTH 32 /* in bytes */
-#define LP5523_PROGRAM_PAGES 6
+#define LP5523_RESET 0xFF
#define LP5523_ADC_SHORTCIRC_LIM 80
-
-#define LP5523_LEDS 9
-#define LP5523_ENGINES 3
-
-#define LP5523_ENG_MASK_BASE 0x30 /* 00110000 */
-
-#define LP5523_ENG_STATUS_MASK 0x07 /* 00000111 */
-
-#define LP5523_IRQ_FLAGS IRQF_TRIGGER_FALLING
-
#define LP5523_EXT_CLK_USED 0x08
-#define LED_ACTIVE(mux, led) (!!(mux & (0x0001 << led)))
-#define SHIFT_MASK(id) (((id) - 1) * 2)
+/* Memory Page Selection */
+#define LP5523_PAGE_ENG1 0
+#define LP5523_PAGE_ENG2 1
+#define LP5523_PAGE_ENG3 2
+
+/* Program Memory Operations */
+#define LP5523_MODE_ENG1_M 0x30 /* Operation Mode Register */
+#define LP5523_MODE_ENG2_M 0x0C
+#define LP5523_MODE_ENG3_M 0x03
+#define LP5523_LOAD_ENG1 0x10
+#define LP5523_LOAD_ENG2 0x04
+#define LP5523_LOAD_ENG3 0x01
+
+#define LP5523_ENG1_IS_LOADING(mode) \
+ ((mode & LP5523_MODE_ENG1_M) == LP5523_LOAD_ENG1)
+#define LP5523_ENG2_IS_LOADING(mode) \
+ ((mode & LP5523_MODE_ENG2_M) == LP5523_LOAD_ENG2)
+#define LP5523_ENG3_IS_LOADING(mode) \
+ ((mode & LP5523_MODE_ENG3_M) == LP5523_LOAD_ENG3)
+
+#define LP5523_EXEC_ENG1_M 0x30 /* Enable Register */
+#define LP5523_EXEC_ENG2_M 0x0C
+#define LP5523_EXEC_ENG3_M 0x03
+#define LP5523_EXEC_M 0x3F
+#define LP5523_RUN_ENG1 0x20
+#define LP5523_RUN_ENG2 0x08
+#define LP5523_RUN_ENG3 0x02
enum lp5523_chip_id {
LP5523,
LP55231,
};
-struct lp5523_engine {
- int id;
- u8 mode;
- u8 prog_page;
- u8 mux_page;
- u16 led_mux;
- u8 engine_mask;
-};
-
-struct lp5523_led {
- int id;
- u8 chan_nr;
- u8 led_current;
- u8 max_current;
- struct led_classdev cdev;
- struct work_struct brightness_work;
- u8 brightness;
-};
-
-struct lp5523_chip {
- struct mutex lock; /* Serialize control */
- struct i2c_client *client;
- struct lp5523_engine engines[LP5523_ENGINES];
- struct lp5523_led leds[LP5523_LEDS];
- struct lp5523_platform_data *pdata;
- u8 num_channels;
- u8 num_leds;
-};
-
-static inline struct lp5523_led *cdev_to_led(struct led_classdev *cdev)
+static inline void lp5523_wait_opmode_done(void)
{
- return container_of(cdev, struct lp5523_led, cdev);
-}
-
-static inline struct lp5523_chip *engine_to_lp5523(struct lp5523_engine *engine)
-{
- return container_of(engine, struct lp5523_chip,
- engines[engine->id - 1]);
-}
-
-static inline struct lp5523_chip *led_to_lp5523(struct lp5523_led *led)
-{
- return container_of(led, struct lp5523_chip,
- leds[led->id]);
+ usleep_range(1000, 2000);
}
-static void lp5523_set_mode(struct lp5523_engine *engine, u8 mode);
-static int lp5523_set_engine_mode(struct lp5523_engine *engine, u8 mode);
-static int lp5523_load_program(struct lp5523_engine *engine, const u8 *pattern);
-
-static void lp5523_led_brightness_work(struct work_struct *work);
-
-static int lp5523_write(struct i2c_client *client, u8 reg, u8 value)
+static void lp5523_set_led_current(struct lp55xx_led *led, u8 led_current)
{
- return i2c_smbus_write_byte_data(client, reg, value);
+ led->led_current = led_current;
+ lp55xx_write(led->chip, LP5523_REG_LED_CURRENT_BASE + led->chan_nr,
+ led_current);
}
-static int lp5523_read(struct i2c_client *client, u8 reg, u8 *buf)
-{
- s32 ret = i2c_smbus_read_byte_data(client, reg);
-
- if (ret < 0)
- return ret;
-
- *buf = ret;
- return 0;
-}
-
-static int lp5523_detect(struct i2c_client *client)
+static int lp5523_post_init_device(struct lp55xx_chip *chip)
{
int ret;
- u8 buf;
- ret = lp5523_write(client, LP5523_REG_ENABLE, LP5523_ENABLE);
- if (ret)
- return ret;
- ret = lp5523_read(client, LP5523_REG_ENABLE, &buf);
+ ret = lp55xx_write(chip, LP5523_REG_ENABLE, LP5523_ENABLE);
if (ret)
return ret;
- if (buf == 0x40)
- return 0;
- else
- return -ENODEV;
-}
-static int lp5523_configure(struct i2c_client *client)
-{
- struct lp5523_chip *chip = i2c_get_clientdata(client);
- int ret = 0;
- u8 status;
-
- /* one pattern per engine setting led mux start and stop addresses */
- static const u8 pattern[][LP5523_PROGRAM_LENGTH] = {
- { 0x9c, 0x30, 0x9c, 0xb0, 0x9d, 0x80, 0xd8, 0x00, 0},
- { 0x9c, 0x40, 0x9c, 0xc0, 0x9d, 0x80, 0xd8, 0x00, 0},
- { 0x9c, 0x50, 0x9c, 0xd0, 0x9d, 0x80, 0xd8, 0x00, 0},
- };
-
- ret |= lp5523_write(client, LP5523_REG_ENABLE, LP5523_ENABLE);
/* Chip startup time is 500 us, 1 - 2 ms gives some margin */
usleep_range(1000, 2000);
- ret |= lp5523_write(client, LP5523_REG_CONFIG,
+ ret = lp55xx_write(chip, LP5523_REG_CONFIG,
LP5523_AUTO_INC | LP5523_PWR_SAVE |
LP5523_CP_AUTO | LP5523_AUTO_CLK |
LP5523_PWM_PWR_SAVE);
+ if (ret)
+ return ret;
/* turn on all leds */
- ret |= lp5523_write(client, LP5523_REG_ENABLE_LEDS_MSB, 0x01);
- ret |= lp5523_write(client, LP5523_REG_ENABLE_LEDS_LSB, 0xff);
-
- /* hardcode 32 bytes of memory for each engine from program memory */
- ret |= lp5523_write(client, LP5523_REG_CH1_PROG_START, 0x00);
- ret |= lp5523_write(client, LP5523_REG_CH2_PROG_START, 0x10);
- ret |= lp5523_write(client, LP5523_REG_CH3_PROG_START, 0x20);
-
- /* write led mux address space for each channel */
- ret |= lp5523_load_program(&chip->engines[0], pattern[0]);
- ret |= lp5523_load_program(&chip->engines[1], pattern[1]);
- ret |= lp5523_load_program(&chip->engines[2], pattern[2]);
-
- if (ret) {
- dev_err(&client->dev, "could not load mux programs\n");
- return -1;
- }
-
- /* set all engines exec state and mode to run 00101010 */
- ret |= lp5523_write(client, LP5523_REG_ENABLE,
- (LP5523_CMD_RUN | LP5523_ENABLE));
-
- ret |= lp5523_write(client, LP5523_REG_OP_MODE, LP5523_CMD_RUN);
-
- if (ret) {
- dev_err(&client->dev, "could not start mux programs\n");
- return -1;
- }
-
- /* Let the programs run for couple of ms and check the engine status */
- usleep_range(3000, 6000);
- ret = lp5523_read(client, LP5523_REG_STATUS, &status);
- if (ret < 0)
+ ret = lp55xx_write(chip, LP5523_REG_ENABLE_LEDS_MSB, 0x01);
+ if (ret)
return ret;
- status &= LP5523_ENG_STATUS_MASK;
-
- if (status == LP5523_ENG_STATUS_MASK) {
- dev_dbg(&client->dev, "all engines configured\n");
- } else {
- dev_info(&client->dev, "status == %x\n", status);
- dev_err(&client->dev, "cound not configure LED engine\n");
- return -1;
- }
-
- dev_info(&client->dev, "disabling engines\n");
-
- ret |= lp5523_write(client, LP5523_REG_OP_MODE, LP5523_CMD_DISABLED);
-
- return ret;
+ return lp55xx_write(chip, LP5523_REG_ENABLE_LEDS_LSB, 0xff);
}
-static int lp5523_set_engine_mode(struct lp5523_engine *engine, u8 mode)
+static void lp5523_load_engine(struct lp55xx_chip *chip)
{
- struct lp5523_chip *chip = engine_to_lp5523(engine);
- struct i2c_client *client = chip->client;
- int ret;
- u8 engine_state;
+ enum lp55xx_engine_index idx = chip->engine_idx;
+ u8 mask[] = {
+ [LP55XX_ENGINE_1] = LP5523_MODE_ENG1_M,
+ [LP55XX_ENGINE_2] = LP5523_MODE_ENG2_M,
+ [LP55XX_ENGINE_3] = LP5523_MODE_ENG3_M,
+ };
- ret = lp5523_read(client, LP5523_REG_OP_MODE, &engine_state);
- if (ret)
- goto fail;
+ u8 val[] = {
+ [LP55XX_ENGINE_1] = LP5523_LOAD_ENG1,
+ [LP55XX_ENGINE_2] = LP5523_LOAD_ENG2,
+ [LP55XX_ENGINE_3] = LP5523_LOAD_ENG3,
+ };
- engine_state &= ~(engine->engine_mask);
+ u8 page_sel[] = {
+ [LP55XX_ENGINE_1] = LP5523_PAGE_ENG1,
+ [LP55XX_ENGINE_2] = LP5523_PAGE_ENG2,
+ [LP55XX_ENGINE_3] = LP5523_PAGE_ENG3,
+ };
- /* set mode only for this engine */
- mode &= engine->engine_mask;
+ lp55xx_update_bits(chip, LP5523_REG_OP_MODE, mask[idx], val[idx]);
- engine_state |= mode;
+ lp5523_wait_opmode_done();
- ret |= lp5523_write(client, LP5523_REG_OP_MODE, engine_state);
-fail:
- return ret;
+ lp55xx_write(chip, LP5523_REG_PROG_PAGE_SEL, page_sel[idx]);
}
-static int lp5523_load_mux(struct lp5523_engine *engine, u16 mux)
+static void lp5523_stop_engine(struct lp55xx_chip *chip)
{
- struct lp5523_chip *chip = engine_to_lp5523(engine);
- struct i2c_client *client = chip->client;
- int ret = 0;
-
- ret |= lp5523_set_engine_mode(engine, LP5523_CMD_LOAD);
+ lp55xx_write(chip, LP5523_REG_OP_MODE, 0);
+ lp5523_wait_opmode_done();
+}
- ret |= lp5523_write(client, LP5523_REG_PROG_PAGE_SEL, engine->mux_page);
- ret |= lp5523_write(client, LP5523_REG_PROG_MEM,
- (u8)(mux >> 8));
- ret |= lp5523_write(client, LP5523_REG_PROG_MEM + 1, (u8)(mux));
- engine->led_mux = mux;
+static void lp5523_turn_off_channels(struct lp55xx_chip *chip)
+{
+ int i;
- return ret;
+ for (i = 0; i < LP5523_MAX_LEDS; i++)
+ lp55xx_write(chip, LP5523_REG_LED_PWM_BASE + i, 0);
}
-static int lp5523_load_program(struct lp5523_engine *engine, const u8 *pattern)
+static void lp5523_run_engine(struct lp55xx_chip *chip, bool start)
{
- struct lp5523_chip *chip = engine_to_lp5523(engine);
- struct i2c_client *client = chip->client;
+ int ret;
+ u8 mode;
+ u8 exec;
- int ret = 0;
+ /* stop engine */
+ if (!start) {
+ lp5523_stop_engine(chip);
+ lp5523_turn_off_channels(chip);
+ return;
+ }
- ret |= lp5523_set_engine_mode(engine, LP5523_CMD_LOAD);
+ /*
+ * To run the engine,
+ * operation mode and enable register should updated at the same time
+ */
- ret |= lp5523_write(client, LP5523_REG_PROG_PAGE_SEL,
- engine->prog_page);
- ret |= i2c_smbus_write_i2c_block_data(client, LP5523_REG_PROG_MEM,
- LP5523_PROGRAM_LENGTH, pattern);
+ ret = lp55xx_read(chip, LP5523_REG_OP_MODE, &mode);
+ if (ret)
+ return;
- return ret;
-}
+ ret = lp55xx_read(chip, LP5523_REG_ENABLE, &exec);
+ if (ret)
+ return;
-static int lp5523_run_program(struct lp5523_engine *engine)
-{
- struct lp5523_chip *chip = engine_to_lp5523(engine);
- struct i2c_client *client = chip->client;
- int ret;
+ /* change operation mode to RUN only when each engine is loading */
+ if (LP5523_ENG1_IS_LOADING(mode)) {
+ mode = (mode & ~LP5523_MODE_ENG1_M) | LP5523_RUN_ENG1;
+ exec = (exec & ~LP5523_EXEC_ENG1_M) | LP5523_RUN_ENG1;
+ }
- ret = lp5523_write(client, LP5523_REG_ENABLE,
- LP5523_CMD_RUN | LP5523_ENABLE);
- if (ret)
- goto fail;
+ if (LP5523_ENG2_IS_LOADING(mode)) {
+ mode = (mode & ~LP5523_MODE_ENG2_M) | LP5523_RUN_ENG2;
+ exec = (exec & ~LP5523_EXEC_ENG2_M) | LP5523_RUN_ENG2;
+ }
- ret = lp5523_set_engine_mode(engine, LP5523_CMD_RUN);
-fail:
- return ret;
+ if (LP5523_ENG3_IS_LOADING(mode)) {
+ mode = (mode & ~LP5523_MODE_ENG3_M) | LP5523_RUN_ENG3;
+ exec = (exec & ~LP5523_EXEC_ENG3_M) | LP5523_RUN_ENG3;
+ }
+
+ lp55xx_write(chip, LP5523_REG_OP_MODE, mode);
+ lp5523_wait_opmode_done();
+
+ lp55xx_update_bits(chip, LP5523_REG_ENABLE, LP5523_EXEC_M, exec);
}
-static int lp5523_mux_parse(const char *buf, u16 *mux, size_t len)
+static int lp5523_update_program_memory(struct lp55xx_chip *chip,
+ const u8 *data, size_t size)
{
+ u8 pattern[LP5523_PROGRAM_LENGTH] = {0};
+ unsigned cmd;
+ char c[3];
+ int update_size;
+ int nrchars;
+ int offset = 0;
+ int ret;
int i;
- u16 tmp_mux = 0;
-
- len = min_t(int, len, LP5523_LEDS);
- for (i = 0; i < len; i++) {
- switch (buf[i]) {
- case '1':
- tmp_mux |= (1 << i);
- break;
- case '0':
- break;
- case '\n':
- i = len;
- break;
- default:
- return -1;
- }
- }
- *mux = tmp_mux;
- return 0;
-}
+ /* clear program memory before updating */
+ for (i = 0; i < LP5523_PROGRAM_LENGTH; i++)
+ lp55xx_write(chip, LP5523_REG_PROG_MEM + i, 0);
-static void lp5523_mux_to_array(u16 led_mux, char *array)
-{
- int i, pos = 0;
- for (i = 0; i < LP5523_LEDS; i++)
- pos += sprintf(array + pos, "%x", LED_ACTIVE(led_mux, i));
+ i = 0;
+ while ((offset < size - 1) && (i < LP5523_PROGRAM_LENGTH)) {
+ /* separate sscanfs because length is working only for %s */
+ ret = sscanf(data + offset, "%2s%n ", c, &nrchars);
+ if (ret != 1)
+ goto err;
- array[pos] = '\0';
-}
+ ret = sscanf(c, "%2x", &cmd);
+ if (ret != 1)
+ goto err;
-/*--------------------------------------------------------------*/
-/* Sysfs interface */
-/*--------------------------------------------------------------*/
+ pattern[i] = (u8)cmd;
+ offset += nrchars;
+ i++;
+ }
-static ssize_t show_engine_leds(struct device *dev,
- struct device_attribute *attr,
- char *buf, int nr)
-{
- struct i2c_client *client = to_i2c_client(dev);
- struct lp5523_chip *chip = i2c_get_clientdata(client);
- char mux[LP5523_LEDS + 1];
+ /* Each instruction is 16bit long. Check that length is even */
+ if (i % 2)
+ goto err;
- lp5523_mux_to_array(chip->engines[nr - 1].led_mux, mux);
+ update_size = i;
+ for (i = 0; i < update_size; i++)
+ lp55xx_write(chip, LP5523_REG_PROG_MEM + i, pattern[i]);
- return sprintf(buf, "%s\n", mux);
-}
+ return 0;
-#define show_leds(nr) \
-static ssize_t show_engine##nr##_leds(struct device *dev, \
- struct device_attribute *attr, \
- char *buf) \
-{ \
- return show_engine_leds(dev, attr, buf, nr); \
+err:
+ dev_err(&chip->cl->dev, "wrong pattern format\n");
+ return -EINVAL;
}
-show_leds(1)
-show_leds(2)
-show_leds(3)
-static ssize_t store_engine_leds(struct device *dev,
- struct device_attribute *attr,
- const char *buf, size_t len, int nr)
+static void lp5523_firmware_loaded(struct lp55xx_chip *chip)
{
- struct i2c_client *client = to_i2c_client(dev);
- struct lp5523_chip *chip = i2c_get_clientdata(client);
- u16 mux = 0;
- ssize_t ret;
+ const struct firmware *fw = chip->fw;
- if (lp5523_mux_parse(buf, &mux, len))
- return -EINVAL;
-
- mutex_lock(&chip->lock);
- ret = -EINVAL;
- if (chip->engines[nr - 1].mode != LP5523_CMD_LOAD)
- goto leave;
+ if (fw->size > LP5523_PROGRAM_LENGTH) {
+ dev_err(&chip->cl->dev, "firmware data size overflow: %zu\n",
+ fw->size);
+ return;
+ }
- if (lp5523_load_mux(&chip->engines[nr - 1], mux))
- goto leave;
+ /*
+ * Program momery sequence
+ * 1) set engine mode to "LOAD"
+ * 2) write firmware data into program memory
+ */
- ret = len;
-leave:
- mutex_unlock(&chip->lock);
- return ret;
+ lp5523_load_engine(chip);
+ lp5523_update_program_memory(chip, fw->data, fw->size);
}
-#define store_leds(nr) \
-static ssize_t store_engine##nr##_leds(struct device *dev, \
- struct device_attribute *attr, \
- const char *buf, size_t len) \
-{ \
- return store_engine_leds(dev, attr, buf, len, nr); \
-}
-store_leds(1)
-store_leds(2)
-store_leds(3)
-
static ssize_t lp5523_selftest(struct device *dev,
struct device_attribute *attr,
char *buf)
{
- struct i2c_client *client = to_i2c_client(dev);
- struct lp5523_chip *chip = i2c_get_clientdata(client);
+ struct lp55xx_led *led = i2c_get_clientdata(to_i2c_client(dev));
+ struct lp55xx_chip *chip = led->chip;
+ struct lp55xx_platform_data *pdata = chip->pdata;
int i, ret, pos = 0;
- int led = 0;
u8 status, adc, vdd;
mutex_lock(&chip->lock);
- ret = lp5523_read(chip->client, LP5523_REG_STATUS, &status);
+ ret = lp55xx_read(chip, LP5523_REG_STATUS, &status);
if (ret < 0)
goto fail;
/* Check that ext clock is really in use if requested */
- if ((chip->pdata) && (chip->pdata->clock_mode == LP5523_CLOCK_EXT))
+ if (pdata->clock_mode == LP55XX_CLOCK_EXT) {
if ((status & LP5523_EXT_CLK_USED) == 0)
goto fail;
+ }
/* Measure VDD (i.e. VBAT) first (channel 16 corresponds to VDD) */
- lp5523_write(chip->client, LP5523_REG_LED_TEST_CTRL,
- LP5523_EN_LEDTEST | 16);
+ lp55xx_write(chip, LP5523_REG_LED_TEST_CTRL, LP5523_EN_LEDTEST | 16);
usleep_range(3000, 6000); /* ADC conversion time is typically 2.7 ms */
- ret = lp5523_read(chip->client, LP5523_REG_STATUS, &status);
+ ret = lp55xx_read(chip, LP5523_REG_STATUS, &status);
if (ret < 0)
goto fail;
if (!(status & LP5523_LEDTEST_DONE))
usleep_range(3000, 6000); /* Was not ready. Wait little bit */
- ret = lp5523_read(chip->client, LP5523_REG_LED_TEST_ADC, &vdd);
+ ret = lp55xx_read(chip, LP5523_REG_LED_TEST_ADC, &vdd);
if (ret < 0)
goto fail;
vdd--; /* There may be some fluctuation in measurement */
- for (i = 0; i < LP5523_LEDS; i++) {
+ for (i = 0; i < LP5523_MAX_LEDS; i++) {
/* Skip non-existing channels */
- if (chip->pdata->led_config[i].led_current == 0)
+ if (pdata->led_config[i].led_current == 0)
continue;
/* Set default current */
- lp5523_write(chip->client,
- LP5523_REG_LED_CURRENT_BASE + i,
- chip->pdata->led_config[i].led_current);
+ lp55xx_write(chip, LP5523_REG_LED_CURRENT_BASE + i,
+ pdata->led_config[i].led_current);
- lp5523_write(chip->client, LP5523_REG_LED_PWM_BASE + i, 0xff);
+ lp55xx_write(chip, LP5523_REG_LED_PWM_BASE + i, 0xff);
/* let current stabilize 2 - 4ms before measurements start */
usleep_range(2000, 4000);
- lp5523_write(chip->client,
- LP5523_REG_LED_TEST_CTRL,
+ lp55xx_write(chip, LP5523_REG_LED_TEST_CTRL,
LP5523_EN_LEDTEST | i);
/* ADC conversion time is 2.7 ms typically */
usleep_range(3000, 6000);
- ret = lp5523_read(chip->client, LP5523_REG_STATUS, &status);
+ ret = lp55xx_read(chip, LP5523_REG_STATUS, &status);
if (ret < 0)
goto fail;
if (!(status & LP5523_LEDTEST_DONE))
usleep_range(3000, 6000);/* Was not ready. Wait. */
- ret = lp5523_read(chip->client, LP5523_REG_LED_TEST_ADC, &adc);
+
+ ret = lp55xx_read(chip, LP5523_REG_LED_TEST_ADC, &adc);
if (ret < 0)
goto fail;
if (adc >= vdd || adc < LP5523_ADC_SHORTCIRC_LIM)
pos += sprintf(buf + pos, "LED %d FAIL\n", i);
- lp5523_write(chip->client, LP5523_REG_LED_PWM_BASE + i, 0x00);
+ lp55xx_write(chip, LP5523_REG_LED_PWM_BASE + i, 0x00);
/* Restore current */
- lp5523_write(chip->client,
- LP5523_REG_LED_CURRENT_BASE + i,
- chip->leds[led].led_current);
+ lp55xx_write(chip, LP5523_REG_LED_CURRENT_BASE + i,
+ led->led_current);
led++;
}
if (pos == 0)
return pos;
}
-static void lp5523_set_brightness(struct led_classdev *cdev,
- enum led_brightness brightness)
-{
- struct lp5523_led *led = cdev_to_led(cdev);
-
- led->brightness = (u8)brightness;
-
- schedule_work(&led->brightness_work);
-}
-
static void lp5523_led_brightness_work(struct work_struct *work)
{
- struct lp5523_led *led = container_of(work,
- struct lp5523_led,
+ struct lp55xx_led *led = container_of(work, struct lp55xx_led,
brightness_work);
- struct lp5523_chip *chip = led_to_lp5523(led);
- struct i2c_client *client = chip->client;
+ struct lp55xx_chip *chip = led->chip;
mutex_lock(&chip->lock);
-
- lp5523_write(client, LP5523_REG_LED_PWM_BASE + led->chan_nr,
+ lp55xx_write(chip, LP5523_REG_LED_PWM_BASE + led->chan_nr,
led->brightness);
-
- mutex_unlock(&chip->lock);
-}
-
-static int lp5523_do_store_load(struct lp5523_engine *engine,
- const char *buf, size_t len)
-{
- struct lp5523_chip *chip = engine_to_lp5523(engine);
- struct i2c_client *client = chip->client;
- int ret, nrchars, offset = 0, i = 0;
- char c[3];
- unsigned cmd;
- u8 pattern[LP5523_PROGRAM_LENGTH] = {0};
-
- if (engine->mode != LP5523_CMD_LOAD)
- return -EINVAL;
-
- while ((offset < len - 1) && (i < LP5523_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++;
- }
-
- /* Each instruction is 16bit long. Check that length is even */
- if (i % 2)
- goto fail;
-
- mutex_lock(&chip->lock);
- ret = lp5523_load_program(engine, pattern);
mutex_unlock(&chip->lock);
-
- if (ret) {
- dev_err(&client->dev, "failed loading pattern\n");
- return ret;
- }
-
- return len;
-fail:
- dev_err(&client->dev, "wrong pattern format\n");
- return -EINVAL;
-}
-
-static ssize_t store_engine_load(struct device *dev,
- struct device_attribute *attr,
- const char *buf, size_t len, int nr)
-{
- struct i2c_client *client = to_i2c_client(dev);
- struct lp5523_chip *chip = i2c_get_clientdata(client);
- return lp5523_do_store_load(&chip->engines[nr - 1], buf, len);
}
-#define store_load(nr) \
-static ssize_t store_engine##nr##_load(struct device *dev, \
- struct device_attribute *attr, \
- const char *buf, size_t len) \
-{ \
- return store_engine_load(dev, attr, buf, len, nr); \
-}
-store_load(1)
-store_load(2)
-store_load(3)
-
-static ssize_t show_engine_mode(struct device *dev,
- struct device_attribute *attr,
- char *buf, int nr)
-{
- struct i2c_client *client = to_i2c_client(dev);
- struct lp5523_chip *chip = i2c_get_clientdata(client);
- switch (chip->engines[nr - 1].mode) {
- case LP5523_CMD_RUN:
- return sprintf(buf, "run\n");
- case LP5523_CMD_LOAD:
- return sprintf(buf, "load\n");
- case LP5523_CMD_DISABLED:
- return sprintf(buf, "disabled\n");
- default:
- return sprintf(buf, "disabled\n");
- }
-}
-
-#define show_mode(nr) \
-static ssize_t show_engine##nr##_mode(struct device *dev, \
- struct device_attribute *attr, \
- char *buf) \
-{ \
- return show_engine_mode(dev, attr, buf, nr); \
-}
-show_mode(1)
-show_mode(2)
-show_mode(3)
-
-static ssize_t store_engine_mode(struct device *dev,
- struct device_attribute *attr,
- const char *buf, size_t len, int nr)
-{
- struct i2c_client *client = to_i2c_client(dev);
- struct lp5523_chip *chip = i2c_get_clientdata(client);
- struct lp5523_engine *engine = &chip->engines[nr - 1];
- mutex_lock(&chip->lock);
-
- if (!strncmp(buf, "run", 3))
- lp5523_set_mode(engine, LP5523_CMD_RUN);
- else if (!strncmp(buf, "load", 4))
- lp5523_set_mode(engine, LP5523_CMD_LOAD);
- else if (!strncmp(buf, "disabled", 8))
- lp5523_set_mode(engine, LP5523_CMD_DISABLED);
-
- mutex_unlock(&chip->lock);
- return len;
-}
-
-#define store_mode(nr) \
-static ssize_t store_engine##nr##_mode(struct device *dev, \
- struct device_attribute *attr, \
- const char *buf, size_t len) \
-{ \
- return store_engine_mode(dev, attr, buf, len, nr); \
-}
-store_mode(1)
-store_mode(2)
-store_mode(3)
-
-static ssize_t show_max_current(struct device *dev,
- struct device_attribute *attr,
- char *buf)
-{
- struct led_classdev *led_cdev = dev_get_drvdata(dev);
- struct lp5523_led *led = cdev_to_led(led_cdev);
-
- return sprintf(buf, "%d\n", led->max_current);
-}
-
-static ssize_t show_current(struct device *dev,
- struct device_attribute *attr,
- char *buf)
-{
- struct led_classdev *led_cdev = dev_get_drvdata(dev);
- struct lp5523_led *led = cdev_to_led(led_cdev);
-
- return sprintf(buf, "%d\n", led->led_current);
-}
-
-static ssize_t store_current(struct device *dev,
- struct device_attribute *attr,
- const char *buf, size_t len)
-{
- struct led_classdev *led_cdev = dev_get_drvdata(dev);
- struct lp5523_led *led = cdev_to_led(led_cdev);
- struct lp5523_chip *chip = led_to_lp5523(led);
- ssize_t ret;
- unsigned long curr;
-
- if (kstrtoul(buf, 0, &curr))
- return -EINVAL;
-
- if (curr > led->max_current)
- return -EINVAL;
-
- mutex_lock(&chip->lock);
- ret = lp5523_write(chip->client,
- LP5523_REG_LED_CURRENT_BASE + led->chan_nr,
- (u8)curr);
- mutex_unlock(&chip->lock);
-
- if (ret < 0)
- return ret;
-
- led->led_current = (u8)curr;
-
- return len;
-}
-
-/* led class device attributes */
-static DEVICE_ATTR(led_current, S_IRUGO | S_IWUSR, show_current, store_current);
-static DEVICE_ATTR(max_current, S_IRUGO , show_max_current, NULL);
-
-static struct attribute *lp5523_led_attributes[] = {
- &dev_attr_led_current.attr,
- &dev_attr_max_current.attr,
- NULL,
-};
-
-static struct attribute_group lp5523_led_attribute_group = {
- .attrs = lp5523_led_attributes
-};
-
-/* device attributes */
-static DEVICE_ATTR(engine1_mode, S_IRUGO | S_IWUSR,
- show_engine1_mode, store_engine1_mode);
-static DEVICE_ATTR(engine2_mode, S_IRUGO | S_IWUSR,
- show_engine2_mode, store_engine2_mode);
-static DEVICE_ATTR(engine3_mode, S_IRUGO | S_IWUSR,
- show_engine3_mode, store_engine3_mode);
-static DEVICE_ATTR(engine1_leds, S_IRUGO | S_IWUSR,
- show_engine1_leds, store_engine1_leds);
-static DEVICE_ATTR(engine2_leds, S_IRUGO | S_IWUSR,
- show_engine2_leds, store_engine2_leds);
-static DEVICE_ATTR(engine3_leds, S_IRUGO | S_IWUSR,
- show_engine3_leds, store_engine3_leds);
-static DEVICE_ATTR(engine1_load, S_IWUSR, NULL, store_engine1_load);
-static DEVICE_ATTR(engine2_load, S_IWUSR, NULL, store_engine2_load);
-static DEVICE_ATTR(engine3_load, S_IWUSR, NULL, store_engine3_load);
static DEVICE_ATTR(selftest, S_IRUGO, lp5523_selftest, NULL);
static struct attribute *lp5523_attributes[] = {
- &dev_attr_engine1_mode.attr,
- &dev_attr_engine2_mode.attr,
- &dev_attr_engine3_mode.attr,
&dev_attr_selftest.attr,
- &dev_attr_engine1_load.attr,
- &dev_attr_engine1_leds.attr,
- &dev_attr_engine2_load.attr,
- &dev_attr_engine2_leds.attr,
- &dev_attr_engine3_load.attr,
- &dev_attr_engine3_leds.attr,
NULL,
};
.attrs = lp5523_attributes,
};
-static int lp5523_register_sysfs(struct i2c_client *client)
-{
- struct device *dev = &client->dev;
- int ret;
-
- ret = sysfs_create_group(&dev->kobj, &lp5523_group);
- if (ret < 0)
- return ret;
-
- return 0;
-}
-
-static void lp5523_unregister_sysfs(struct i2c_client *client)
-{
- struct lp5523_chip *chip = i2c_get_clientdata(client);
- struct device *dev = &client->dev;
- int i;
-
- sysfs_remove_group(&dev->kobj, &lp5523_group);
-
- for (i = 0; i < chip->num_leds; i++)
- sysfs_remove_group(&chip->leds[i].cdev.dev->kobj,
- &lp5523_led_attribute_group);
-}
-
-/*--------------------------------------------------------------*/
-/* Set chip operating mode */
-/*--------------------------------------------------------------*/
-static void lp5523_set_mode(struct lp5523_engine *engine, u8 mode)
-{
- /* if in that mode already do nothing, except for run */
- if (mode == engine->mode && mode != LP5523_CMD_RUN)
- return;
-
- switch (mode) {
- case LP5523_CMD_RUN:
- lp5523_run_program(engine);
- break;
- case LP5523_CMD_LOAD:
- lp5523_set_engine_mode(engine, LP5523_CMD_DISABLED);
- lp5523_set_engine_mode(engine, LP5523_CMD_LOAD);
- break;
- case LP5523_CMD_DISABLED:
- lp5523_set_engine_mode(engine, LP5523_CMD_DISABLED);
- break;
- default:
- return;
- }
-
- engine->mode = mode;
-}
-
-/*--------------------------------------------------------------*/
-/* Probe, Attach, Remove */
-/*--------------------------------------------------------------*/
-static int __init lp5523_init_engine(struct lp5523_engine *engine, int id)
-{
- if (id < 1 || id > LP5523_ENGINES)
- return -1;
- engine->id = id;
- engine->engine_mask = LP5523_ENG_MASK_BASE >> SHIFT_MASK(id);
- engine->prog_page = id - 1;
- engine->mux_page = id + 2;
-
- return 0;
-}
+/* Chip specific configurations */
+static struct lp55xx_device_config lp5523_cfg = {
+ .reset = {
+ .addr = LP5523_REG_RESET,
+ .val = LP5523_RESET,
+ },
+ .enable = {
+ .addr = LP5523_REG_ENABLE,
+ .val = LP5523_ENABLE,
+ },
+ .max_channel = LP5523_MAX_LEDS,
+ .post_init_device = lp5523_post_init_device,
+ .brightness_work_fn = lp5523_led_brightness_work,
+ .set_led_current = lp5523_set_led_current,
+ .firmware_cb = lp5523_firmware_loaded,
+ .run_engine = lp5523_run_engine,
+ .dev_attr_group = &lp5523_group,
+};
-static int lp5523_init_led(struct lp5523_led *led, struct device *dev,
- int chan, struct lp5523_platform_data *pdata,
- const char *chip_name)
+static int lp5523_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
{
- char name[32];
- int res;
+ int ret;
+ struct lp55xx_chip *chip;
+ struct lp55xx_led *led;
+ struct lp55xx_platform_data *pdata = client->dev.platform_data;
- if (chan >= LP5523_LEDS)
+ if (!pdata) {
+ dev_err(&client->dev, "no platform data\n");
return -EINVAL;
-
- if (pdata->led_config[chan].led_current) {
- led->led_current = pdata->led_config[chan].led_current;
- led->max_current = pdata->led_config[chan].max_current;
- led->chan_nr = pdata->led_config[chan].chan_nr;
-
- if (led->chan_nr >= LP5523_LEDS) {
- dev_err(dev, "Use channel numbers between 0 and %d\n",
- LP5523_LEDS - 1);
- return -EINVAL;
- }
-
- if (pdata->led_config[chan].name) {
- led->cdev.name = pdata->led_config[chan].name;
- } else {
- snprintf(name, sizeof(name), "%s:channel%d",
- pdata->label ? : chip_name, chan);
- led->cdev.name = name;
- }
-
- led->cdev.brightness_set = lp5523_set_brightness;
- res = led_classdev_register(dev, &led->cdev);
- if (res < 0) {
- dev_err(dev, "couldn't register led on channel %d\n",
- chan);
- return res;
- }
- res = sysfs_create_group(&led->cdev.dev->kobj,
- &lp5523_led_attribute_group);
- if (res < 0) {
- dev_err(dev, "couldn't register current attribute\n");
- led_classdev_unregister(&led->cdev);
- return res;
- }
- } else {
- led->led_current = 0;
}
- return 0;
-}
-
-static int lp5523_probe(struct i2c_client *client,
- const struct i2c_device_id *id)
-{
- struct lp5523_chip *chip;
- struct lp5523_platform_data *pdata;
- int ret, i, led;
chip = devm_kzalloc(&client->dev, sizeof(*chip), GFP_KERNEL);
if (!chip)
return -ENOMEM;
- i2c_set_clientdata(client, chip);
- chip->client = client;
+ led = devm_kzalloc(&client->dev,
+ sizeof(*led) * pdata->num_channels, GFP_KERNEL);
+ if (!led)
+ return -ENOMEM;
- pdata = client->dev.platform_data;
-
- if (!pdata) {
- dev_err(&client->dev, "no platform data\n");
- return -EINVAL;
- }
+ chip->cl = client;
+ chip->pdata = pdata;
+ chip->cfg = &lp5523_cfg;
mutex_init(&chip->lock);
- chip->pdata = pdata;
+ i2c_set_clientdata(client, led);
- if (pdata->setup_resources) {
- ret = pdata->setup_resources();
- if (ret < 0)
- return ret;
- }
-
- if (pdata->enable) {
- pdata->enable(0);
- usleep_range(1000, 2000); /* Keep enable down at least 1ms */
- pdata->enable(1);
- usleep_range(1000, 2000); /* 500us abs min. */
- }
-
- lp5523_write(client, LP5523_REG_RESET, 0xff);
- usleep_range(10000, 20000); /*
- * Exact value is not available. 10 - 20ms
- * appears to be enough for reset.
- */
- ret = lp5523_detect(client);
+ ret = lp55xx_init_device(chip);
if (ret)
- goto fail1;
+ goto err_init;
dev_info(&client->dev, "%s Programmable led chip found\n", id->name);
- /* Initialize engines */
- for (i = 0; i < ARRAY_SIZE(chip->engines); i++) {
- ret = lp5523_init_engine(&chip->engines[i], i + 1);
- if (ret) {
- dev_err(&client->dev, "error initializing engine\n");
- goto fail1;
- }
- }
- ret = lp5523_configure(client);
- if (ret < 0) {
- dev_err(&client->dev, "error configuring chip\n");
- goto fail1;
- }
-
- /* Initialize leds */
- chip->num_channels = pdata->num_channels;
- chip->num_leds = 0;
- led = 0;
- for (i = 0; i < pdata->num_channels; i++) {
- /* Do not initialize channels that are not connected */
- if (pdata->led_config[i].led_current == 0)
- continue;
-
- INIT_WORK(&chip->leds[led].brightness_work,
- lp5523_led_brightness_work);
-
- ret = lp5523_init_led(&chip->leds[led], &client->dev, i, pdata,
- id->name);
- if (ret) {
- dev_err(&client->dev, "error initializing leds\n");
- goto fail2;
- }
- chip->num_leds++;
-
- chip->leds[led].id = led;
- /* Set LED current */
- lp5523_write(client,
- LP5523_REG_LED_CURRENT_BASE + chip->leds[led].chan_nr,
- chip->leds[led].led_current);
-
- led++;
- }
+ ret = lp55xx_register_leds(led, chip);
+ if (ret)
+ goto err_register_leds;
- ret = lp5523_register_sysfs(client);
+ ret = lp55xx_register_sysfs(chip);
if (ret) {
dev_err(&client->dev, "registering sysfs failed\n");
- goto fail2;
+ goto err_register_sysfs;
}
- return ret;
-fail2:
- for (i = 0; i < chip->num_leds; i++) {
- led_classdev_unregister(&chip->leds[i].cdev);
- flush_work(&chip->leds[i].brightness_work);
- }
-fail1:
- if (pdata->enable)
- pdata->enable(0);
- if (pdata->release_resources)
- pdata->release_resources();
+
+ return 0;
+
+err_register_sysfs:
+ lp55xx_unregister_leds(led, chip);
+err_register_leds:
+ lp55xx_deinit_device(chip);
+err_init:
return ret;
}
static int lp5523_remove(struct i2c_client *client)
{
- struct lp5523_chip *chip = i2c_get_clientdata(client);
- int i;
-
- /* Disable engine mode */
- lp5523_write(client, LP5523_REG_OP_MODE, LP5523_CMD_DISABLED);
+ struct lp55xx_led *led = i2c_get_clientdata(client);
+ struct lp55xx_chip *chip = led->chip;
- lp5523_unregister_sysfs(client);
-
- for (i = 0; i < chip->num_leds; i++) {
- led_classdev_unregister(&chip->leds[i].cdev);
- flush_work(&chip->leds[i].brightness_work);
- }
+ lp5523_stop_engine(chip);
+ lp55xx_unregister_sysfs(chip);
+ lp55xx_unregister_leds(led, chip);
+ lp55xx_deinit_device(chip);
- if (chip->pdata->enable)
- chip->pdata->enable(0);
- if (chip->pdata->release_resources)
- chip->pdata->release_resources();
return 0;
}
module_i2c_driver(lp5523_driver);
MODULE_AUTHOR("Mathias Nyman <mathias.nyman@nokia.com>");
+MODULE_AUTHOR("Milo Kim <milo.kim@ti.com>");
MODULE_DESCRIPTION("LP5523 LED engine");
MODULE_LICENSE("GPL");
projects / firefly-linux-kernel-4.4.55.git / blobdiff