+static ssize_t show_engine_mode(struct device *dev,
+ struct device_attribute *attr,
+ char *buf, int nr)
+{
+ struct lp55xx_led *led = i2c_get_clientdata(to_i2c_client(dev));
+ struct lp55xx_chip *chip = led->chip;
+ enum lp55xx_engine_mode mode = chip->engines[nr - 1].mode;
+
+ switch (mode) {
+ case LP55XX_ENGINE_RUN:
+ return sprintf(buf, "run\n");
+ case LP55XX_ENGINE_LOAD:
+ return sprintf(buf, "load\n");
+ case LP55XX_ENGINE_DISABLED:
+ default:
+ return sprintf(buf, "disabled\n");
+ }
+}
+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 lp55xx_led *led = i2c_get_clientdata(to_i2c_client(dev));
+ struct lp55xx_chip *chip = led->chip;
+ struct lp55xx_engine *engine = &chip->engines[nr - 1];
+
+ mutex_lock(&chip->lock);
+
+ chip->engine_idx = nr;
+
+ if (!strncmp(buf, "run", 3)) {
+ lp5523_run_engine(chip, true);
+ engine->mode = LP55XX_ENGINE_RUN;
+ } else if (!strncmp(buf, "load", 4)) {
+ lp5523_stop_engine(chip);
+ lp5523_load_engine(chip);
+ engine->mode = LP55XX_ENGINE_LOAD;
+ } else if (!strncmp(buf, "disabled", 8)) {
+ lp5523_stop_engine(chip);
+ engine->mode = LP55XX_ENGINE_DISABLED;
+ }
+
+ mutex_unlock(&chip->lock);
+
+ return len;
+}
+store_mode(1)
+store_mode(2)
+store_mode(3)
+
+static int lp5523_mux_parse(const char *buf, u16 *mux, size_t len)
+{
+ u16 tmp_mux = 0;
+ int i;
+
+ len = min_t(int, len, LP5523_MAX_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;
+}
+
+static void lp5523_mux_to_array(u16 led_mux, char *array)
+{
+ int i, pos = 0;
+ for (i = 0; i < LP5523_MAX_LEDS; i++)
+ pos += sprintf(array + pos, "%x", LED_ACTIVE(led_mux, i));
+
+ array[pos] = '\0';
+}
+
+static ssize_t show_engine_leds(struct device *dev,
+ struct device_attribute *attr,
+ char *buf, int nr)
+{
+ struct lp55xx_led *led = i2c_get_clientdata(to_i2c_client(dev));
+ struct lp55xx_chip *chip = led->chip;
+ char mux[LP5523_MAX_LEDS + 1];
+
+ lp5523_mux_to_array(chip->engines[nr - 1].led_mux, mux);
+
+ return sprintf(buf, "%s\n", mux);
+}
+show_leds(1)
+show_leds(2)
+show_leds(3)
+
+static int lp5523_load_mux(struct lp55xx_chip *chip, u16 mux, int nr)
+{
+ struct lp55xx_engine *engine = &chip->engines[nr - 1];
+ int ret;
+ u8 mux_page[] = {
+ [LP55XX_ENGINE_1] = LP5523_PAGE_MUX1,
+ [LP55XX_ENGINE_2] = LP5523_PAGE_MUX2,
+ [LP55XX_ENGINE_3] = LP5523_PAGE_MUX3,
+ };
+
+ lp5523_load_engine(chip);
+
+ ret = lp55xx_write(chip, LP5523_REG_PROG_PAGE_SEL, mux_page[nr]);
+ if (ret)
+ return ret;
+
+ ret = lp55xx_write(chip, LP5523_REG_PROG_MEM , (u8)(mux >> 8));
+ if (ret)
+ return ret;
+
+ ret = lp55xx_write(chip, LP5523_REG_PROG_MEM + 1, (u8)(mux));
+ if (ret)
+ return ret;
+
+ engine->led_mux = mux;
+ return 0;
+}
+
+static ssize_t store_engine_leds(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t len, int nr)
+{
+ struct lp55xx_led *led = i2c_get_clientdata(to_i2c_client(dev));
+ struct lp55xx_chip *chip = led->chip;
+ struct lp55xx_engine *engine = &chip->engines[nr - 1];
+ u16 mux = 0;
+ ssize_t ret;
+
+ if (lp5523_mux_parse(buf, &mux, len))
+ return -EINVAL;
+
+ mutex_lock(&chip->lock);
+
+ chip->engine_idx = nr;
+ ret = -EINVAL;
+
+ if (engine->mode != LP55XX_ENGINE_LOAD)
+ goto leave;
+
+ if (lp5523_load_mux(chip, mux, nr))
+ goto leave;
+
+ ret = len;
+leave:
+ mutex_unlock(&chip->lock);
+ return ret;
+}
+store_leds(1)
+store_leds(2)
+store_leds(3)
+
+static ssize_t store_engine_load(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t len, int nr)
+{
+ struct lp55xx_led *led = i2c_get_clientdata(to_i2c_client(dev));
+ struct lp55xx_chip *chip = led->chip;
+
+ mutex_lock(&chip->lock);
+
+ chip->engine_idx = nr;
+ lp5523_load_engine_and_select_page(chip);
+
+ mutex_unlock(&chip->lock);
+
+ return lp5523_update_program_memory(chip, buf, len);
+}
+store_load(1)
+store_load(2)
+store_load(3)
+