SPI maximum frequency

Thanks.
I read the contents of the extracted.dts file using vim.
Here is the result:

spi@1 {
                        compatible = "tegra-spidev";
                        reg = <0x1>;
                        spi-max-frequency = <0x1f78a40>;

                        controller-data {
                                nvidia,enable-hw-based-cs;
                                nvidia,rx-clk-tap-delay = <0x6>;
                        };
                };

                spi@0 {
                        compatible = "tegra-spidev";
                        reg = <0x0>;
                        spi-max-frequency = <0x1f78a40>;

                        controller-data {
                                nvidia,enable-hw-based-cs;
                                nvidia,rx-clk-tap-delay = <0x6>;
                        };
                };

The HEX number 0x1f78a40 is equal to 33000000 decimal (33MHz).