From 857e3c94d346bb78ff1cfadecef9749f921b6b35 Mon Sep 17 00:00:00 2001 From: Jett Rink Date: Mon, 8 Jul 2019 14:11:32 -0600 Subject: arcada: lower i2c bus speed to 400kHz The sensors on the i2c line do not operate reliably at 1Mhz i2c bus speed. Lower to 400kHz BRANCH=75,76 BUG=b:136676970 TEST=verify that i2c bus speed when from ~1Mhz to ~400kHz after this change with an oscilloscope. Change-Id: Ie970f76fe7408de17f92bfc9f22a951b635fd278 Signed-off-by: Jett Rink Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/ec/+/1691309 Commit-Queue: Jack Rosenthal Reviewed-by: Jack Rosenthal (cherry picked from commit 48765c68fc17b84902afc0a3bd5926e5721e669f) Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/ec/+/1693124 --- board/arcada_ish/board.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/board/arcada_ish/board.c b/board/arcada_ish/board.c index 8d1566723e..c80e070647 100644 --- a/board/arcada_ish/board.c +++ b/board/arcada_ish/board.c @@ -26,7 +26,7 @@ const struct i2c_port_t i2c_ports[] = { { .name = "sensor", .port = I2C_PORT_SENSOR, - .kbps = 1000 + .kbps = 400, }, }; const unsigned int i2c_ports_used = ARRAY_SIZE(i2c_ports); -- cgit v1.2.1