SDK 2.1.1 RP2350, writing to flash changes QSPI pad settings

[UKTailwind]

Writing to flash changes the QSPI pad settings back to default. I've worked round this by making the following change to flash.c

typedef struct flash_rp2350_qmi_save_state {
    uint32_t timing;
    uint32_t rcmd;
    uint32_t rfmt;
    uint32_t io[6];
} flash_rp2350_qmi_save_state_t;

static void __no_inline_not_in_flash_func(flash_rp2350_save_qmi_cs1)(flash_rp2350_qmi_save_state_t *state) {
    state->timing = qmi_hw->m[1].timing;
    state->rcmd = qmi_hw->m[1].rcmd;
    state->rfmt = qmi_hw->m[1].rfmt;
    state->io[0]=pads_qspi_hw->io[0];
    state->io[1]=pads_qspi_hw->io[1];
    state->io[2]=pads_qspi_hw->io[2];
    state->io[3]=pads_qspi_hw->io[3];
    state->io[4]=pads_qspi_hw->io[4];
    state->io[5]=pads_qspi_hw->io[5];
}

static void __no_inline_not_in_flash_func(flash_rp2350_restore_qmi_cs1)(const flash_rp2350_qmi_save_state_t *state) {
    if (flash_devinfo_get_cs_size(1) == FLASH_DEVINFO_SIZE_NONE) {
        // Case 1: The RP2350 ROM sets QMI to a clean (03h read) configuration
        // during flash_exit_xip(), even though when CS1 is not enabled via
        // FLASH_DEVINFO it does not issue an XIP exit sequence to CS1. In
        // this case, restore the original register config for CS1 as it is
        // still the correct config.
        qmi_hw->m[1].timing = state->timing;
        qmi_hw->m[1].rcmd = state->rcmd;
        qmi_hw->m[1].rfmt = state->rfmt;
        pads_qspi_hw->io[0]=state->io[0];
        pads_qspi_hw->io[1]=state->io[1];
        pads_qspi_hw->io[2]=state->io[2];
        pads_qspi_hw->io[3]=state->io[3];
        pads_qspi_hw->io[4]=state->io[4];
        pads_qspi_hw->io[5]=state->io[5];
        } else {
        // Case 2: If RAM is attached to CS1, and the ROM has issued an XIP
        // exit sequence to it, then the ROM re-initialisation of the QMI
        // registers has actually not gone far enough. The old XIP write mode
        // is no longer valid when the QSPI RAM is returned to a serial
        // command state. Restore the default 02h serial write command config.
        qmi_hw->m[1].wfmt = QMI_M1_WFMT_RESET;
        qmi_hw->m[1].wcmd = QMI_M1_WCMD_RESET;
    }
}
#endif