Chip detection may fail if the chip is in some odd state for example after system restart. Chip doesn't have HW reset line.
Signed-off-by: Samu Onkalo <[email protected]> --- drivers/leds/leds-lp5523.c | 12 +++++------- 1 files changed, 5 insertions(+), 7 deletions(-) diff --git a/drivers/leds/leds-lp5523.c b/drivers/leds/leds-lp5523.c index 4248d78..0cc4ead 100644 --- a/drivers/leds/leds-lp5523.c +++ b/drivers/leds/leds-lp5523.c @@ -203,13 +203,6 @@ static int lp5523_configure(struct i2c_client *client) { 0x9c, 0x50, 0x9c, 0xd0, 0x9d, 0x80, 0xd8, 0x00, 0}, }; - 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_write(client, LP5523_REG_ENABLE, LP5523_ENABLE); /* Chip startup time is 500 us, 1 - 2 ms gives some margin */ usleep_range(1000, 2000); @@ -941,6 +934,11 @@ static int lp5523_probe(struct i2c_client *client, 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); if (ret) goto fail2; -- 1.6.0.4 -- To unsubscribe from this list: send the line "unsubscribe linux-i2c" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
