staticint lp5523_init_program_engine(struct lp55xx_chip *chip)
{ int i; int j; int ret;
u8 status; /* one pattern per engine setting LED MUX start and stop addresses */ staticconst u8 pattern[][LP55xx_BYTES_PER_PAGE] = {
{ 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},
};
/* hardcode 32 bytes of memory for each engine from program memory */
ret = lp55xx_write(chip, LP5523_REG_CH1_PROG_START, 0x00); if (ret) return ret;
ret = lp55xx_write(chip, LP5523_REG_CH2_PROG_START, 0x10); if (ret) return ret;
ret = lp55xx_write(chip, LP5523_REG_CH3_PROG_START, 0x20); if (ret) return ret;
/* write LED MUX address space for each engine */ for (i = LP55XX_ENGINE_1; i <= LP55XX_ENGINE_3; i++) {
chip->engine_idx = i;
lp55xx_load_engine(chip);
for (j = 0; j < LP55xx_BYTES_PER_PAGE; j++) {
ret = lp55xx_write(chip, LP5523_REG_PROG_MEM + j,
pattern[i - 1][j]); if (ret) goto out;
}
}
lp5523_run_engine(chip, true);
/* Let the programs run for couple of ms and check the engine status */
usleep_range(3000, 6000);
ret = lp55xx_read(chip, LP5523_REG_STATUS, &status); if (ret) goto out;
status &= LP5523_ENG_STATUS_MASK;
if (status != LP5523_ENG_STATUS_MASK) {
dev_err(&chip->cl->dev, "could not configure LED engine, status = 0x%.2x\n",
status);
ret = -1;
}
ret = lp55xx_read(chip, LP5523_REG_STATUS, &status); if (ret < 0) return sysfs_emit(buf, "FAIL\n");
/* Check that ext clock is really in use if requested */ if (pdata->clock_mode == LP55XX_CLOCK_EXT) { if ((status & LP5523_EXT_CLK_USED) == 0) return sysfs_emit(buf, "FAIL\n");
}
/* Measure VDD (i.e. VBAT) first (channel 16 corresponds to VDD) */
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 = lp55xx_read(chip, LP5523_REG_STATUS, &status); if (ret < 0) return sysfs_emit(buf, "FAIL\n");
if (!(status & LP5523_LEDTEST_DONE))
usleep_range(3000, 6000); /* Was not ready. Wait little bit */
ret = lp55xx_read(chip, LP5523_REG_LED_TEST_ADC, &vdd); if (ret < 0) return sysfs_emit(buf, "FAIL\n");
vdd--; /* There may be some fluctuation in measurement */
for (i = 0; i < pdata->num_channels; i++) { /* Skip disabled channels */ if (pdata->led_config[i].led_current == 0) continue;
/* Set default current */
lp55xx_write(chip, LP5523_REG_LED_CURRENT_BASE + led->chan_nr,
pdata->led_config[i].led_current);
lp55xx_write(chip, LP5523_REG_LED_PWM_BASE + led->chan_nr,
0xff); /* let current stabilize 2 - 4ms before measurements start */
usleep_range(2000, 4000);
lp55xx_write(chip, LP5523_REG_LED_TEST_CTRL,
LP5523_EN_LEDTEST | led->chan_nr); /* ADC conversion time is 2.7 ms typically */
usleep_range(3000, 6000);
ret = lp55xx_read(chip, LP5523_REG_STATUS, &status); if (ret < 0) return sysfs_emit(buf, "FAIL\n");
if (!(status & LP5523_LEDTEST_DONE))
usleep_range(3000, 6000); /* Was not ready. Wait. */
ret = lp55xx_read(chip, LP5523_REG_LED_TEST_ADC, &adc); if (ret < 0) return sysfs_emit(buf, "FAIL\n");
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