Commit 95ea8eec authored by Samu Onkalo's avatar Samu Onkalo Committed by Linus Torvalds
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drivers/leds/leds-lp5521.c: perform SW reset before detection



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: default avatarSamu Onkalo <samu.p.onkalo@nokia.com>
Cc: Richard Purdie <rpurdie@rpsys.net>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent 2e4840ed
......@@ -245,13 +245,6 @@ static int lp5521_configure(struct i2c_client *client,
lp5521_init_engine(chip, attr_group);
lp5521_write(client, LP5521_REG_RESET, 0xff);
usleep_range(10000, 20000); /*
* Exact value is not available. 10 - 20ms
* appears to be enough for reset.
*/
/* Set all PWMs to direct control mode */
ret = lp5521_write(client, LP5521_REG_OP_MODE, 0x3F);
......@@ -716,6 +709,11 @@ static int lp5521_probe(struct i2c_client *client,
usleep_range(1000, 2000); /* 500us abs min. */
}
lp5521_write(client, LP5521_REG_RESET, 0xff);
usleep_range(10000, 20000); /*
* Exact value is not available. 10 - 20ms
* appears to be enough for reset.
*/
ret = lp5521_detect(client);
if (ret) {
......
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