Using serial driver 16550A in poll mode without interrupt connected

[Michal Simek]

Hi,

we have internal discussion around serial drivers and their usage without interrupts
in polling mode. It is on FPGA with Microblaze/PPC/ARM and
it is easy for us to have serial IP without IRQ connected to the interrupt controller.

Driver is probed with no IRQ (NO_IRQ = -1 on Microblaze)
83e00000.serial: ttyS0 at MMIO 0x83e01003 (irq = -1) is a 16550A

writing any data to ttyS0 return -1.
Is there any reason no to use driver in poll mode especially for user applications
not for consoles.

Is it possible to use serial driver without IRQ - or blocking IRQ, etc.?

Currently we care about uart16550 and uarlite.

Thanks,
Michal

--
Michal Simek, Ing. (M.Eng)
w: www.monstr.eu p: +42-0-721842854
Maintainer of Linux kernel 2.6 Microblaze Linux - http://www.monstr.eu/fdt/
Microblaze U-BOOT custodian
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