linux-toradex.git/arch/powerpc/kernel/legacy_serial.c, branch v3.7.2 Linux kernel for Apalis and Colibri modules powerpc: Fix build on some non-freescale platforms 2012-01-25T02:33:22+00:00 Benjamin Herrenschmidt benh@kernel.crashing.org 2012-01-25T02:33:22+00:00 3493c85366ba09c9d0972c919e7123367a39982a Commit 9deaa53ac7fa373623123aa4f18828dd62292b1a broke build on platforms that use legacy_serial.c without also having CONFIG_SERIAL_8250_FSL enabled due to an unconditional code to a routine in that module. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> 
Commit 9deaa53ac7fa373623123aa4f18828dd62292b1a broke build
on platforms that use legacy_serial.c without also having
CONFIG_SERIAL_8250_FSL enabled due to an unconditional code
to a routine in that module.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
serial: add irq handler for Freescale 16550 errata. 2011-12-10T03:14:13+00:00 Paul Gortmaker paul.gortmaker@windriver.com 2011-12-04T23:42:23+00:00 9deaa53ac7fa373623123aa4f18828dd62292b1a Sending a break on the SOC UARTs found in some MPC83xx/85xx/86xx chips seems to cause a short lived IRQ storm (/proc/interrupts typically shows somewhere between 300 and 1500 events). Unfortunately this renders SysRQ over the serial console completely inoperable. The suggested workaround in the errata is to read the Rx register, wait one character period, and then read the Rx register again. We achieve this by tracking the old LSR value, and on the subsequent interrupt event after a break, we don't read LSR, instead we just read the RBR again and return immediately. The "fsl,ns16550" is used in the compatible field of the serial device to mark UARTs known to have this issue. Thanks to Scott Wood for providing the errata data which led to a much cleaner fix. Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com> Acked-by: Alan Cox <alan@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de> 
Sending a break on the SOC UARTs found in some MPC83xx/85xx/86xx
chips seems to cause a short lived IRQ storm (/proc/interrupts
typically shows somewhere between 300 and 1500 events).  Unfortunately
this renders SysRQ over the serial console completely inoperable.

The suggested workaround in the errata is to read the Rx register,
wait one character period, and then read the Rx register again.
We achieve this by tracking the old LSR value, and on the subsequent
interrupt event after a break, we don't read LSR, instead we just
read the RBR again and return immediately.

The "fsl,ns16550" is used in the compatible field of the serial
device to mark UARTs known to have this issue.

Thanks to Scott Wood for providing the errata data which led to
a much cleaner fix.

Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
Acked-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
serial/8250: Move UPIO_TSI to powerpc 2011-09-19T23:19:39+00:00 Arnd Bergmann arnd@arndb.de 2011-06-27T11:45:16+00:00 7df5659eefad9b6d457ccdee016bd78bd064cfc0 This iotype is only used by the legacy_serial code in powerpc, so the code should live there, rather than be compiled in for every 8250 driver. Signed-off-by: Arnd Bergmann <arnd@arndb.de> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: linuxppc-dev@lists.ozlabs.org Cc: Greg Kroah-Hartman <gregkh@suse.de> Cc: linux-serial@vger.kernel.org Acked-by: David Daney <david.daney@cavium.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> 
This iotype is only used by the legacy_serial code in powerpc, so the
code should live there, rather than be compiled in for every 8250
driver.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: linuxppc-dev@lists.ozlabs.org
Cc: Greg Kroah-Hartman <gregkh@suse.de>
Cc: linux-serial@vger.kernel.org
Acked-by: David Daney <david.daney@cavium.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
powerpc: Check device status before adding serial device 2011-04-12T11:29:21+00:00 Prabhakar Kushwaha prabhakar@freescale.com 2011-04-06T07:26:29+00:00 07d9fce24d871785dbd25458469032fea73f17b8 serial port nodes with the property status="disabled" are not usable and so avoid adding "disabled" port with the system. Signed-off-by: Prabhakar Kushwaha <prabhakar@freescale.com> Signed-off-by: Kumar Gala <galak@kernel.crashing.org> 
serial port nodes with the property status="disabled" are not usable and so
avoid adding "disabled" port with the system.

Signed-off-by: Prabhakar Kushwaha <prabhakar@freescale.com>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
powerpc, of_serial: Endianness issues setting up the serial ports 2010-10-07T23:21:15+00:00 Ian Munsie imunsie@au1.ibm.com 2010-10-01T07:06:07+00:00 f14362d1fe81cece6f1d78483e5bbfcf8cc497bf The speed and clock of the serial ports is retrieved from the device tree in both the PowerPC legacy serial code and the Open Firmware serial driver, therefore they need to handle the fact that the device tree is always big endian, while the CPU may not be. Also fix other device tree references in the legacy serial code. Signed-off-by: Ian Munsie <imunsie@au1.ibm.com> Signed-off-by: Grant Likely <grant.likely@secretlab.ca> 
The speed and clock of the serial ports is retrieved from the device
tree in both the PowerPC legacy serial code and the Open Firmware serial
driver, therefore they need to handle the fact that the device tree is
always big endian, while the CPU may not be.

Also fix other device tree references in the legacy serial code.

Signed-off-by: Ian Munsie <imunsie@au1.ibm.com>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
of/address: Clean up function declarations 2010-08-01T07:42:42+00:00 Grant Likely grant.likely@secretlab.ca 2010-07-29T17:49:01+00:00 22ae782f86b726f9cea752c0f269ff6dcdf2f6e1 This patch moves the declaration of of_get_address(), of_get_pci_address(), and of_pci_address_to_resource() out of arch code and into the common linux/of_address header file. This patch also fixes some of the asm/prom.h ordering issues. It still includes some header files that it ideally shouldn't be, but at least the ordering is consistent now so that of_* overrides work. Signed-off-by: Grant Likely <grant.likely@secretlab.ca> 
This patch moves the declaration of of_get_address(), of_get_pci_address(),
and of_pci_address_to_resource() out of arch code and into the common
linux/of_address header file.

This patch also fixes some of the asm/prom.h ordering issues.  It still
includes some header files that it ideally shouldn't be, but at least the
ordering is consistent now so that of_* overrides work.

Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
Fix spelling of 'platform' in comments and doc 2010-02-05T11:22:34+00:00 Stefan Weil weil@mail.berlios.de 2010-01-06T23:03:52+00:00 947af2943576400628bba085eaa6b85143526133 Replace platfrom -> platform. This is a frequent spelling bug. Signed-off-by: Stefan Weil <weil@mail.berlios.de> Signed-off-by: Jiri Kosina <jkosina@suse.cz> 
Replace platfrom -> platform.

This is a frequent spelling bug.

Signed-off-by: Stefan Weil <weil@mail.berlios.de>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
powerpc/powermac: Fixup default serial port device for pmac_zilog 2008-07-28T06:30:53+00:00 Benjamin Herrenschmidt benh@kernel.crashing.org 2008-07-28T03:49:15+00:00 025d7917a5ede982a5669c6735ef73a227b9827e This removes the non-working code in legacy_serial that tried to handle the powermac SCC ports, and instead add a (now working) function to the powermac platform code to find the default serial console if any. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> 
This removes the non-working code in legacy_serial that tried to handle
the powermac SCC ports, and instead add a (now working) function to the
powermac platform code to find the default serial console if any.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
powerpc: Fix unterminated of_device_id array in legacy_serial.c 2008-07-07T15:53:49+00:00 Benjamin Herrenschmidt benh@kernel.crashing.org 2008-07-07T06:39:50+00:00 3bc5ab9b7f2760d2892fd0a0589e1077e869d4f5 A recent patch to legacy_serial.c factored out some code by using the of_match_node() facility to match a node against an array of possible matches. However, the patch didn't properly terminate the array causing potential crashes in cases where no match is found. In addition, the name of the array was poorly chosen for a static symbol making debugging harder. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> 
A recent patch to legacy_serial.c factored out some code by
using the of_match_node() facility to match a node against
an array of possible matches. However, the patch didn't properly
terminate the array causing potential crashes in cases where no
match is found. In addition, the name of the array was poorly
chosen for a static symbol making debugging harder.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
powerpc/legacy_serial: Bail if reg-offset/shift properties are present 2008-07-01T21:12:37+00:00 John Linn john.linn@xilinx.com 2008-07-01T17:52:41+00:00 1e6d1f260611387a7b4e6eae4d1dd6f62e53714d The legacy serial driver does not work with an 8250 type UART that is described in the device tree with the reg-offset and reg-shift properties. This change makes legacy_serial ignore these devices. Signed-off-by: John Linn <john.linn@xilinx.com> Signed-off-by: Grant Likely <grant.likely@secretlab.ca> 
The legacy serial driver does not work with an 8250 type UART that is
described in the device tree with the reg-offset and reg-shift
properties.  This change makes legacy_serial ignore these devices.

Signed-off-by: John Linn <john.linn@xilinx.com>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>