Add RTC to firmware

[Kampi]

Closes #309

[Kampi]

@jakkra we have to modify the RTC patch and replace

    if (regs[0] & RV8263_BM_OS) {
        return -ECANCELED;
    }

with

    /* Clear the oscillator stop flag and return an error when the oscillator is stopped. */
    /* The flag is set again if the error condition for the oscillator is still active. */
    if (regs[0] & RV8263_BM_OS) {
        regs[0] &= ~RV8263_BM_OS;
        i2c_reg_write_byte_dt(&config->i2c_bus, RV8263C8_REGISTER_SECONDS,
                              regs[0]);
        return -ECANCELED;
    }

What´s the best way to do it? Can I simply copy+paste this code into the patch?

[jakkra]

@jakkra we have to modify the RTC patch and replace

    if (regs[0] & RV8263_BM_OS) {
        return -ECANCELED;
    }

with

    /* Clear the oscillator stop flag and return an error when the oscillator is stopped. */
    /* The flag is set again if the error condition for the oscillator is still active. */
    if (regs[0] & RV8263_BM_OS) {
        regs[0] &= ~RV8263_BM_OS;
        i2c_reg_write_byte_dt(&config->i2c_bus, RV8263C8_REGISTER_SECONDS,
                              regs[0]);
        return -ECANCELED;
    }

What´s the best way to do it? Can I simply copy+paste this code into the patch?

Idk, try it, see if patch applies correctly otherwise can regenerate the patch

[Kampi]

@jakkra I´ve updated the RTC patch to the latest version from Zephyr to handle the issue with the alarms.

[jakkra]

@jakkra I´ve updated the RTC patch to the latest version from Zephyr to handle the issue with the alarms.

OK great, will test it. Should everything work if I rebase on this branch or do I need to do something more?

[Kampi]

I´ve tested it before the new patch and time and update are working. The changes are related to alarms which wasn´t tested by me but I don´t expect any issues.