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MIPS: rb532: Fix MMIO UART resource registration

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Since commit 6e690d54cf ("serial: 8250: fix return error code in
serial8250_request_std_resource()"), registering an 8250 MMIO port
without mapbase no longer works, as the resource range is derived from
mapbase/mapsize.

Populate mapbase and mapsize accordingly. Also drop ugly membase KSEG1
pointer and set UPF_IOREMAP instead, letting the 8250 core perform the
ioremap.

Fixes: 6e690d54cf ("serial: 8250: fix return error code in serial8250_request_std_resource()")
Cc: stable@vger.kernel.org
Reported-by: Waldemar Brodkorb <wbx@openadk.org>
Link: https://lore.kernel.org/linux-mips/aX-d0ShTplHKZT33@waldemar-brodkorb.de/
Signed-off-by: Jiaxun Yang <jiaxun.yang@flygoat.com>
Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
This commit is contained in:
Jiaxun Yang 2026-02-05 10:08:42 +00:00 committed by Thomas Bogendoerfer
parent 30bfc2d6a1
commit e93bb4b76c
1 changed files with 3 additions and 2 deletions
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5
arch/mips/rb532/devices.c
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@ -212,11 +212,12 @@ static struct platform_device rb532_wdt = {
static struct plat_serial8250_port rb532_uart_res[] = {
{
.type = PORT_16550A,
.membase = (char *)KSEG1ADDR(REGBASE + UART0BASE),
.mapbase = REGBASE + UART0BASE,
.mapsize = 0x1000,
.irq = UART0_IRQ,
.regshift = 2,
.iotype = UPIO_MEM,
.flags = UPF_BOOT_AUTOCONF,
.flags = UPF_BOOT_AUTOCONF | UPF_IOREMAP,
},
{
.flags = 0,