On Tue, Feb 16, 2021 at 11:25:38PM +0100, Mårten Lindahl wrote:

From: Mårten Lindahl <redacted>

When the driver starts to send a message with the MASTER_ID field
set (high speed), the whole I2C_ADDR register is overwritten including
MASTER_ID as the SLV_ADDR_MAS field is set.

This patch preserves already written fields in I2C_ADDR when writing
SLV_ADDR_MAS.

Signed-off-by: Mårten Lindahl <redacted>
---
v2:
- Change commit message as the problem is not in the controller but in
  the driver.
- Use MASTER_ID macro instead of reading back register contents.

 drivers/i2c/busses/i2c-exynos5.c | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

Reviewed-by: Krzysztof Kozlowski <krzk@kernel.org>
Tested-by: Krzysztof Kozlowski <krzk@kernel.org>

Best regards,
Krzysztof