Extensive testing has shown that at higher temperatures operating without a GSC backup battery, the GSC needs a small delay after releasing the I2C SDA/SCL pins before it is ready to handle I2C requests.
Add a delay to avoid errors such as: wait_for_sr_state: Arbitration lost sr=93 cr=80 state=2020 i2c_init_transfer: failed for chip 0x20 retry=0
Signed-off-by: Tim Harvey tharvey@gateworks.com --- board/gateworks/venice/spl.c | 1 + 1 file changed, 1 insertion(+)
diff --git a/board/gateworks/venice/spl.c b/board/gateworks/venice/spl.c index 9a22eeef36ba..ec3c394d24d8 100644 --- a/board/gateworks/venice/spl.c +++ b/board/gateworks/venice/spl.c @@ -303,6 +303,7 @@ void board_init_f(ulong dummy) mdelay(10); } pinctrl_select_state(bus, "default"); + mdelay(10); } } /* Wait indefiniately until the GSC probes */