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Nokia RX-51: Decrease i2c speed to 100000

Message ID 20201121223011.14262-1-pali@kernel.org
State New
Delegated to: Lokesh Vutla
Headers show
Series Nokia RX-51: Decrease i2c speed to 100000 | expand

Commit Message

Pali Rohár Nov. 21, 2020, 10:30 p.m. UTC
It looks like that i2c bus lot of times timeout on some units. Prior
migration to CONFIG_DM_I2C i2c speed was set to CONFIG_SYS_OMAP24_I2C_SPEED
value which was 100000. Lower speed fixes timeout problems, so change speed
back to its previous value.

Signed-off-by: Pali Rohár <pali@kernel.org>
Fixes: 8d8c18170325 ("Nokia RX-51: Convert to CONFIG_DM_I2C")
---
Please include this patch into U-Boot master branch for 2020.01 release
to have i2c bus working.
---
 board/nokia/rx51/rx51.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)
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Patch

diff --git a/board/nokia/rx51/rx51.c b/board/nokia/rx51/rx51.c
index 3d62b5d9ad..2dd41604c9 100644
--- a/board/nokia/rx51/rx51.c
+++ b/board/nokia/rx51/rx51.c
@@ -704,9 +704,9 @@  void board_mmc_power_init(void)
 }
 
 static const struct omap_i2c_platdata rx51_i2c[] = {
-	{ I2C_BASE1, 2200000, OMAP_I2C_REV_V1 },
+	{ I2C_BASE1, 100000, OMAP_I2C_REV_V1 },
 	{ I2C_BASE2, 100000, OMAP_I2C_REV_V1 },
-	{ I2C_BASE3, 400000, OMAP_I2C_REV_V1 },
+	{ I2C_BASE3, 100000, OMAP_I2C_REV_V1 },
 };
 
 U_BOOT_DEVICES(rx51_i2c) = {