On 05/12/2023 04:02, Chukun Pan wrote: >> That does not look like XO, but GCC_USB0_MOCK_UTMI_CLK > > I don't have the datasheet, but the reference clock (XO) is 24MHz, > and I receive the following warning: > clk: couldn't set gcc_usb0_mock_utmi_clk clk rate to 20000000 (-22), current rate: 24000000 Referencing XO in commit msg is confusing. Anyway, answer to such error is not necessarily change the clock rate. What if it must be 20 MHz? You just ignore such requirement... Best regards, Krzysztof