I'm using Zynq 7020 AMP config with Linux on CPU0 and FreeRTOS on
CPU1. ps7_i2c_0 is to be used by CPU1. What is the proper device
tree setting to use for ps7_i2c_0 in this case?
1) ps7_i2c_0: ps7-i2c@e0004000 { compatible = "invalid"; };
or
2) ps7_i2c_0: ps7-i2c@e0004000 {
bus-id = <0>;
clocks = <&clkc 38>;
compatible = "cdns,i2c-r1p10", "xlnx,ps7-i2c-1.00.a";
interrupt-parent = <&ps7_scugic_0>;
interrupts = <0 25 4>;
reg = <0xe0004000 0x1000>;
i2c-clk = <400000>;
#address-cells = <1>;
#size-cells = <0>; } ;
It seems if I use #1, the i2c port does not respond to CPU1, even
though I am using "clk_ignore_unused" kernel parameter to ensure i2c
clock is not disabled.
If I use #2, i2c port responds to CPU1, but then I would need to be
vigilant that nothing on Linux is trying to use that i2c port?
I am using #2 since #1 doesn't work, but is there a more proper way to
do this so that Linux/CPU0 doesn't have access to the i2c port?
Thanks for your help.
Ed
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