Hi
On Sat, Nov 21, 2020 at 11:30 PM Pali Rohár pali@kernel.org wrote:
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(-)
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 },
I can understand this one. I don't know what kind of speed was before
{ I2C_BASE2, 100000, OMAP_I2C_REV_V1 },
{ I2C_BASE3, 400000, OMAP_I2C_REV_V1 },
{ I2C_BASE3, 100000, OMAP_I2C_REV_V1 },
Can you report the peripherals have this problem? I mean a lot of i2c devices can run to 400Khz. And how are those buses configured in the kernel?
Michael
};
U_BOOT_DEVICES(rx51_i2c) = {
2.20.1