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Could you post your dts-entry for the I2C?
Maybe you want to add a i2c-sda-hold-time...
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Thanks for the fast response! Here ist the Info from the .dts for all I2C, 0 and 1 are for HPS use and 2 is for FPGA routing 3 inst implemented jet.
hps_0_i2c0: i2c@0xffc04000 {
compatible = "snps,designware-i2c-15.1", "snps,designware-i2c";
reg = <0xffc04000 0x00000100>;
interrupt-parent = <&hps_0_arm_gic_0>;
interrupts = <0 158 4>;
clocks = <&l4_sp_clk>;
emptyfifo_hold_master = <1>; /* embeddedsw.dts.params.emptyfifo_hold_master type NUMBER */
status = "okay"; /* embeddedsw.dts.params.status type STRING */
speed-mode = <0>; /* appended from boardinfo */
i2c-sda-falling-time-ns = <5000>; /* appended from boardinfo */
i2c-scl-falling-time-ns = <5000>; /* appended from boardinfo */
}; //end i2c@0xffc04000 (hps_0_i2c0)
hps_0_i2c1: i2c@0xffc05000 {
compatible = "snps,designware-i2c-15.1", "snps,designware-i2c";
reg = <0xffc05000 0x00000100>;
interrupt-parent = <&hps_0_arm_gic_0>;
interrupts = <0 159 4>;
clocks = <&l4_sp_clk>;
emptyfifo_hold_master = <1>; /* embeddedsw.dts.params.emptyfifo_hold_master type NUMBER */
status = "okay"; /* embeddedsw.dts.params.status type STRING */
}; //end i2c@0xffc05000 (hps_0_i2c1)
hps_0_i2c2: i2c@0xffc06000 {
compatible = "snps,designware-i2c-15.1", "snps,designware-i2c";
reg = <0xffc06000 0x00000100>;
interrupt-parent = <&hps_0_arm_gic_0>;
interrupts = <0 160 4>;
clocks = <&l4_sp_clk>;
emptyfifo_hold_master = <1>; /* embeddedsw.dts.params.emptyfifo_hold_master type NUMBER */
status = "okay"; /* embeddedsw.dts.params.status type STRING */
}; //end i2c@0xffc06000 (hps_0_i2c2)
hps_0_i2c3: i2c@0xffc07000 {
compatible = "snps,designware-i2c-15.1", "snps,designware-i2c";
reg = <0xffc07000 0x00000100>;
interrupt-parent = <&hps_0_arm_gic_0>;
interrupts = <0 161 4>;
clocks = <&l4_sp_clk>;
emptyfifo_hold_master = <1>; /* embeddedsw.dts.params.emptyfifo_hold_master type NUMBER */
status = "disabled"; /* embeddedsw.dts.params.status type STRING */
}; //end i2c@0xffc07000 (hps_0_i2c3)
I measured the 4 signals coming out of the HPS and the SDA and SCL have 3.3V after the Buffer an the two .oe signals have 0V constantly.
Honored Contributor
