* SPI irq regression
@ 2020-03-09 18:54 Otavio Salvador
[not found] ` <CAP9ODKpW=h6SVtsn-uuDQ4+TgR0NnjBW==8vwyQD4+x_dbFzRQ-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
0 siblings, 1 reply; 2+ messages in thread
From: Otavio Salvador @ 2020-03-09 18:54 UTC (permalink / raw)
To: kernel-sKpHZLTYfq0, Heiko Stuebner, Mark Brown,
linux-spi-u79uwXL29TY76Z2rM5mHXA,
linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r
Hi,
Since commit:
commit 01b59ce5dac856323a0c13c1d51d99a819f32efe
Author: Emil Renner Berthing <kernel-sKpHZLTYfq0@public.gmane.org>
Date: Wed Oct 31 11:57:09 2018 +0100
spi: rockchip: use irq rather than polling
Register an interrupt handler to fill/empty the
tx and rx fifos rather than busy-looping.
Signed-off-by: Emil Renner Berthing <kernel-sKpHZLTYfq0@public.gmane.org>
Tested-by: Heiko Stuebner <heiko-4mtYJXux2i+zQB+pC5nmwQ@public.gmane.org>
Signed-off-by: Mark Brown <broonie-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>
SPI is no longer functional on a RV1108 Elgin board.
The error messages are:
[ 46.186916] spidev spi0.0: SPI transfer timed out
[ 46.187435] spi_master spi0: failed to transfer one message from queue
Reverting this commit makes SPI to work again.
Any ideas on how we can properly fix this regression?
--
Otavio Salvador O.S. Systems
http://www.ossystems.com.br http://code.ossystems.com.br
Mobile: +55 (53) 9 9981-7854 Mobile: +1 (347) 903-9750
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2020-03-09 18:54 SPI irq regression Otavio Salvador
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2020-03-10 17:31 ` Mark Brown
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