From: Alan Tull atull@kernel.org
[ Upstream commit c8da1d15b8a4957f105ad77bb1404d72e304566f ]
DesignWare I2C controller was observed running at 105.93kHz rather than the specified 100kHz. Adjust device tree settings to bring it within spec (a slightly conservative 98 MHz).
Signed-off-by: Alan Tull atull@kernel.org Signed-off-by: Dinh Nguyen dinguyen@kernel.org Signed-off-by: Sasha Levin sashal@kernel.org --- arch/arm64/boot/dts/altera/socfpga_stratix10_socdk.dts | 2 ++ 1 file changed, 2 insertions(+)
diff --git a/arch/arm64/boot/dts/altera/socfpga_stratix10_socdk.dts b/arch/arm64/boot/dts/altera/socfpga_stratix10_socdk.dts index 7c661753bfaf4..faa017d4cd56b 100644 --- a/arch/arm64/boot/dts/altera/socfpga_stratix10_socdk.dts +++ b/arch/arm64/boot/dts/altera/socfpga_stratix10_socdk.dts @@ -124,6 +124,8 @@ &i2c1 { status = "okay"; clock-frequency = <100000>; + i2c-sda-falling-time-ns = <890>; /* hcnt */ + i2c-sdl-falling-time-ns = <890>; /* lcnt */
adc@14 { compatible = "lltc,ltc2497";