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arm64: dts: stratix10: i2c clock running out of spec

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[ Upstream commit c8da1d15b8 ]

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>
This commit is contained in:
Alan Tull
2018-08-08 10:42:41 -05:00
committed by Greg Kroah-Hartman
parent b0bac46b52
commit d4e5c8aeb1
1 changed files with 2 additions and 0 deletions
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arch/arm64/boot/dts/altera/socfpga_stratix10_socdk.dts
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@@ -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";