[PATCH] board: gateworks: venice: delay before reading GSC EEPROM

Tim Harvey tharvey at gateworks.com
Wed Jun 19 23:13:22 CEST 2024


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 at 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 */
-- 
2.25.1



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