[PATCH AUTOSEL 4.19 044/205] arm64: dts: stratix10: i2c clock running out of spec

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



From: Alan Tull <atull@xxxxxxxxxx>

[ 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@xxxxxxxxxx>
Signed-off-by: Dinh Nguyen <dinguyen@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
 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";
-- 
2.20.1




[Index of Archives]     [Device Tree Compilter]     [Device Tree Spec]     [Linux Driver Backports]     [Video for Linux]     [Linux USB Devel]     [Linux PCI Devel]     [Linux Audio Users]     [Linux Kernel]     [Linux SCSI]     [XFree86]     [Yosemite Backpacking]


  Powered by Linux