serial: core: add new I/O type for SPI and I2C bus devices

I2C/SPI serial drivers don't use the following struct uart_port variables:
    port->membase
    port->mapbase
    port->iobase

However, they are forced to set membase to a non-zero value so that
uart_configure_port() will succeed because of the following check:

    /* If there isn't a port here, don't do anything further. */
    if (!port->iobase && !port->mapbase && !port->membase)
        return;

Add a new I/O type for SPI and I2C bus devices to remove the need to
implement the kind of above-mentioned ambiguous workarounds to make them
work. Now that UART report functions are using uart_iotype_*() functions,
no more irrelevant I/O information are being printed for UPIO_BUS iotypes.

Signed-off-by: Hugo Villeneuve <hvilleneuve@dimonoff.com>
Link: https://patch.msgid.link/20260521-tty-upio-v3-7-bf74567994a0@dimonoff.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

0 files changed, 0 insertions, 0 deletions