From: dgilbert@interlog.com (Douglas Gilbert)
To: linux-arm-kernel@lists.infradead.org
Subject: at91sam9x5: uart (not usart) broken
Date: Tue, 06 Aug 2013 20:32:17 -0400 [thread overview]
Message-ID: <52019591.2010408@interlog.com> (raw)
Between lk 3.10.0 and lk 3.11.0-rc4 the uarts (not usarts)
have been broken in the at91sam9x5 family. The DT files have
been re-factored for uarts but look correct.
So suspicion moves to the atmel_serial driver which enjoyed
a lot of changes in June.
Tested on a at91sam9g25 (Aria G25) which is a member of the
at91sam9x5 family with two uarts (four usarts and a debug
serial port). The failure looks like this in dmesg:
console [ttyS0] enabled
f801c000.serial: ttyS1 at MMIO 0xf801c000 (irq = 23) is a ATMEL_SERIAL
f8020000.serial: ttyS2 at MMIO 0xf8020000 (irq = 24) is a ATMEL_SERIAL
f8024000.serial: ttyS3 at MMIO 0xf8024000 (irq = 25) is a ATMEL_SERIAL
atmel_usart: probe of f8040000.serial failed with error -2
f8028000.serial: ttyS4 at MMIO 0xf8028000 (irq = 32) is a ATMEL_SERIAL
The device at 0xf8040000 is uart0 . My DT file was trying
to bring up uart0 but not uart1.
Doug Gilbert
next reply other threads:[~2013-08-07 0:32 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-08-07 0:32 Douglas Gilbert [this message]
2013-08-07 6:33 ` at91sam9x5: uart (not usart) broken boris brezillon
2013-08-07 15:45 ` Douglas Gilbert
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