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Serial driver patch for the PMC-Sierra MSP71xx devices.
There are three different fixes:
1 Fix for DesignWare APB THRE errata: In brief, this is a non-standard
16550 in that the THRE interrupt will not re-assert itself simply by
disabling and re-enabling the THRI bit in the IER, it is only re-enabled
if a character is actually sent out.
It appears that the "8250-uart-backup-timer.patch" in the "mm" tree
also fixes it so we have dropped our initial workaround. This patch now
needs to be applied on top of that "mm" patch.
2 Fix for Busy Detect on LCR write: The DesignWare APB UART has a feature
which causes a new Busy Detect interrupt to be generated if it's busy
when the LCR is written. This fix saves the value of the LCR and
rewrites it after clearing the interrupt.
3 Workaround for interrupt/data concurrency issue: The SoC needs to
ensure that writes that can cause interrupts to be cleared reach the UART
before returning from the ISR. This fix reads a non-destructive register
on the UART so the read transaction completion ensures the previously
queued write transaction has also completed.
Signed-off-by: Marc St-Jean <Marc_St-Jean@pmc-sierra.com>
Cc: Russell King <rmk@arm.linux.org.uk>
Cc: Ralf Baechle <ralf@linux-mips.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Trivial comment fix for include/linux/serial_reg.h
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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Patch from Tony Lindgren
This patch adds the missing serial port registers to build
a bootable OMAP configuration.
Signed-off-by: Tony Lindgren
Signed-off-by: Russell King
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This includes a fuller definition of the 8250 and compatible bits,
and adding notes where the definition varies between different
chips.
This also fixes the following build error:
drivers/serial/8250.c:185: error: `UART_FCR_R_TRIG_10'
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Patch from Deepak Saxena
Supersedes 1809/1
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Patch from Holger Schurig
PXA Serial port (FFUART, BTUART, STUART) and console support
This patch works perfectly here with "console=ttyS0,115200" in the
kernel command line. It contains Jean-frederic Clere fix to detect
STUART and BTUART.
Nico said that I should post it to your patch tracker. It replaces patch 1662/1
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- Al Viro: clean up driver "invalidate_device()" mess
- Andries Brouwer: make sd.c work with USB Dane-Elec CompactFlash Card
Reader
- me: fix nasty lazy kernel page table update problem
- me: undo fork changes. Too many user-level bugs and unresolved issues.
- Peter Anvin: iso9660 cleanups
- Alan Cox: big merge
- Johannes Erdfelt: UHCI pci DMA setup fix
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- Alan Cox: continued merging
- Urban Widmark: smbfs fix (d_add on already hashed dentry - no-no).
- Andrew Morton: 3c59x update
- Jeff Garzik: network driver cleanups and fixes
- Gérard Roudier: sym-ncr drivers update
- Jens Axboe: more loop cleanups and fixes
- David Miller: sparc update, some networking fixes
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