hi everyone:i have decompilied /boot/tegra194-p2888-0001-p2822-0000.dtb to dts file and add spi configure such as:
spi@0 {
compatible = "spi_dev";
reg = <0x0>;
spi-max-frequency = <0x1f78a40>;
controller-data {
nvidia,enable-hw-based-cs;
nvidia,cs-setup-clk-count = <0x1e>;
nvidia,cs-hold-clk-count = <0x1e>;
nvidia,rx-clk-tap-delay = <0x1f>;
nvidia,tx-clk-tap-delay = <0x1f>;
};
};
Then,compilied dts to dtb file,copy dtb file to /boot/ and replace tegra194-p2888-0001-p2822-0000.dtb
sync buffer and reboot system,but the system cant load new dtb file;