From: Geert Uytterhoeven geert+renesas@glider.be
[ Upstream commit 1bff77f41a805b16b5355497c217656711601282 ]
NORMAL (0x0) and IDLE (0x4) are really two different states. Hence you cannot check for both using a bitmask, as that checks for IDLE only, breaking operation for devices that are in NORMAL state.
Fix the wait function to report either state as ready.
Fixes: 6524d8eac258452e ("Input: st1232 - add IDLE state as ready condition") Signed-off-by: Geert Uytterhoeven geert+renesas@glider.be Reviewed-by: Michael Tretter m.tretter@pengutronix.de Link: https://lore.kernel.org/r/20210223090201.1430542-1-geert+renesas@glider.be Signed-off-by: Dmitry Torokhov dmitry.torokhov@gmail.com Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/input/touchscreen/st1232.c | 9 +++++++-- 1 file changed, 7 insertions(+), 2 deletions(-)
diff --git a/drivers/input/touchscreen/st1232.c b/drivers/input/touchscreen/st1232.c index 885f0572488dd..6abae665ca71d 100644 --- a/drivers/input/touchscreen/st1232.c +++ b/drivers/input/touchscreen/st1232.c @@ -94,8 +94,13 @@ static int st1232_ts_wait_ready(struct st1232_ts_data *ts)
for (retries = 10; retries; retries--) { error = st1232_ts_read_data(ts, REG_STATUS, 1); - if (!error && ts->read_buf[0] == (STATUS_NORMAL | STATUS_IDLE | ERROR_NONE)) - return 0; + if (!error) { + switch (ts->read_buf[0]) { + case STATUS_NORMAL | ERROR_NONE: + case STATUS_IDLE | ERROR_NONE: + return 0; + } + }
usleep_range(1000, 2000); }