[PATCH] spi: simple SPI framework
This is the core of a small SPI framework, implementing the model of a
queue of messages which complete asynchronously (with thin synchronous
wrappers on top).
- It's still less than 2KB of ".text" (ARM). If there's got to be a
mid-layer for something so simple, that's the right size budget. :)
- The guts use board-specific SPI device tables to build the driver
model tree. (Hardware probing is rarely an option.)
- This version of Kconfig includes no drivers. At this writing there
are two known master controller drivers (PXA/SSP, OMAP MicroWire)
and three protocol drivers (CS8415a, ADS7846, DataFlash) with LKML
mentions of other drivers in development.
- No userspace API. There are several implementations to compare.
Implement them like any other driver, and bind them with sysfs.
The changes from last version posted to LKML (on 11-Nov-2005) are minor,
and include:
- One bugfix (removes a FIXME), with the visible effect of making device
names be "spiB.C" where B is the bus number and C is the chipselect.
- The "caller provides DMA mappings" mechanism now has kerneldoc, for
DMA drivers that want to be fancy.
- Hey, the framework init can be subsys_init. Even though board init
logic fires earlier, at arch_init ... since the framework init is
for driver support, and the board init support uses static init.
- Various additional spec/doc clarifications based on discussions
with other folk. It adds a brief "thank you" at the end, for folk
who've helped nudge this framework into existence.
As I've said before, I think that "protocol tweaking" is the main support
that this driver framework will need to evolve.
From: Mark Underwood <basicmark@yahoo.com>
Update the SPI framework to remove a potential priority inversion case by
reverting to kmalloc if the pre-allocated DMA-safe buffer isn't available.
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2006-01-08 13:34:19 -08:00
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2008-04-28 02:14:16 -07:00
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[PATCH] spi: simple SPI framework
This is the core of a small SPI framework, implementing the model of a
queue of messages which complete asynchronously (with thin synchronous
wrappers on top).
- It's still less than 2KB of ".text" (ARM). If there's got to be a
mid-layer for something so simple, that's the right size budget. :)
- The guts use board-specific SPI device tables to build the driver
model tree. (Hardware probing is rarely an option.)
- This version of Kconfig includes no drivers. At this writing there
are two known master controller drivers (PXA/SSP, OMAP MicroWire)
and three protocol drivers (CS8415a, ADS7846, DataFlash) with LKML
mentions of other drivers in development.
- No userspace API. There are several implementations to compare.
Implement them like any other driver, and bind them with sysfs.
The changes from last version posted to LKML (on 11-Nov-2005) are minor,
and include:
- One bugfix (removes a FIXME), with the visible effect of making device
names be "spiB.C" where B is the bus number and C is the chipselect.
- The "caller provides DMA mappings" mechanism now has kerneldoc, for
DMA drivers that want to be fancy.
- Hey, the framework init can be subsys_init. Even though board init
logic fires earlier, at arch_init ... since the framework init is
for driver support, and the board init support uses static init.
- Various additional spec/doc clarifications based on discussions
with other folk. It adds a brief "thank you" at the end, for folk
who've helped nudge this framework into existence.
As I've said before, I think that "protocol tweaking" is the main support
that this driver framework will need to evolve.
From: Mark Underwood <basicmark@yahoo.com>
Update the SPI framework to remove a potential priority inversion case by
reverting to kmalloc if the pre-allocated DMA-safe buffer isn't available.
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2006-01-08 13:34:19 -08:00
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2008-04-28 02:14:16 -07:00
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|
[PATCH] spi: simple SPI framework
This is the core of a small SPI framework, implementing the model of a
queue of messages which complete asynchronously (with thin synchronous
wrappers on top).
- It's still less than 2KB of ".text" (ARM). If there's got to be a
mid-layer for something so simple, that's the right size budget. :)
- The guts use board-specific SPI device tables to build the driver
model tree. (Hardware probing is rarely an option.)
- This version of Kconfig includes no drivers. At this writing there
are two known master controller drivers (PXA/SSP, OMAP MicroWire)
and three protocol drivers (CS8415a, ADS7846, DataFlash) with LKML
mentions of other drivers in development.
- No userspace API. There are several implementations to compare.
Implement them like any other driver, and bind them with sysfs.
The changes from last version posted to LKML (on 11-Nov-2005) are minor,
and include:
- One bugfix (removes a FIXME), with the visible effect of making device
names be "spiB.C" where B is the bus number and C is the chipselect.
- The "caller provides DMA mappings" mechanism now has kerneldoc, for
DMA drivers that want to be fancy.
- Hey, the framework init can be subsys_init. Even though board init
logic fires earlier, at arch_init ... since the framework init is
for driver support, and the board init support uses static init.
- Various additional spec/doc clarifications based on discussions
with other folk. It adds a brief "thank you" at the end, for folk
who've helped nudge this framework into existence.
As I've said before, I think that "protocol tweaking" is the main support
that this driver framework will need to evolve.
From: Mark Underwood <basicmark@yahoo.com>
Update the SPI framework to remove a potential priority inversion case by
reverting to kmalloc if the pre-allocated DMA-safe buffer isn't available.
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2006-01-08 13:34:19 -08:00
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2006-11-30 05:22:59 +01:00
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[PATCH] spi: simple SPI framework
This is the core of a small SPI framework, implementing the model of a
queue of messages which complete asynchronously (with thin synchronous
wrappers on top).
- It's still less than 2KB of ".text" (ARM). If there's got to be a
mid-layer for something so simple, that's the right size budget. :)
- The guts use board-specific SPI device tables to build the driver
model tree. (Hardware probing is rarely an option.)
- This version of Kconfig includes no drivers. At this writing there
are two known master controller drivers (PXA/SSP, OMAP MicroWire)
and three protocol drivers (CS8415a, ADS7846, DataFlash) with LKML
mentions of other drivers in development.
- No userspace API. There are several implementations to compare.
Implement them like any other driver, and bind them with sysfs.
The changes from last version posted to LKML (on 11-Nov-2005) are minor,
and include:
- One bugfix (removes a FIXME), with the visible effect of making device
names be "spiB.C" where B is the bus number and C is the chipselect.
- The "caller provides DMA mappings" mechanism now has kerneldoc, for
DMA drivers that want to be fancy.
- Hey, the framework init can be subsys_init. Even though board init
logic fires earlier, at arch_init ... since the framework init is
for driver support, and the board init support uses static init.
- Various additional spec/doc clarifications based on discussions
with other folk. It adds a brief "thank you" at the end, for folk
who've helped nudge this framework into existence.
As I've said before, I think that "protocol tweaking" is the main support
that this driver framework will need to evolve.
From: Mark Underwood <basicmark@yahoo.com>
Update the SPI framework to remove a potential priority inversion case by
reverting to kmalloc if the pre-allocated DMA-safe buffer isn't available.
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2006-01-08 13:34:19 -08:00
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2008-04-28 02:14:16 -07:00
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|
|
|
|
|
|
|
[PATCH] spi: simple SPI framework
This is the core of a small SPI framework, implementing the model of a
queue of messages which complete asynchronously (with thin synchronous
wrappers on top).
- It's still less than 2KB of ".text" (ARM). If there's got to be a
mid-layer for something so simple, that's the right size budget. :)
- The guts use board-specific SPI device tables to build the driver
model tree. (Hardware probing is rarely an option.)
- This version of Kconfig includes no drivers. At this writing there
are two known master controller drivers (PXA/SSP, OMAP MicroWire)
and three protocol drivers (CS8415a, ADS7846, DataFlash) with LKML
mentions of other drivers in development.
- No userspace API. There are several implementations to compare.
Implement them like any other driver, and bind them with sysfs.
The changes from last version posted to LKML (on 11-Nov-2005) are minor,
and include:
- One bugfix (removes a FIXME), with the visible effect of making device
names be "spiB.C" where B is the bus number and C is the chipselect.
- The "caller provides DMA mappings" mechanism now has kerneldoc, for
DMA drivers that want to be fancy.
- Hey, the framework init can be subsys_init. Even though board init
logic fires earlier, at arch_init ... since the framework init is
for driver support, and the board init support uses static init.
- Various additional spec/doc clarifications based on discussions
with other folk. It adds a brief "thank you" at the end, for folk
who've helped nudge this framework into existence.
As I've said before, I think that "protocol tweaking" is the main support
that this driver framework will need to evolve.
From: Mark Underwood <basicmark@yahoo.com>
Update the SPI framework to remove a potential priority inversion case by
reverting to kmalloc if the pre-allocated DMA-safe buffer isn't available.
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2006-01-08 13:34:19 -08:00
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2014-12-20 15:41:11 -05:00
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2008-04-28 02:14:16 -07:00
|
|
|
|
[PATCH] spi: simple SPI framework
This is the core of a small SPI framework, implementing the model of a
queue of messages which complete asynchronously (with thin synchronous
wrappers on top).
- It's still less than 2KB of ".text" (ARM). If there's got to be a
mid-layer for something so simple, that's the right size budget. :)
- The guts use board-specific SPI device tables to build the driver
model tree. (Hardware probing is rarely an option.)
- This version of Kconfig includes no drivers. At this writing there
are two known master controller drivers (PXA/SSP, OMAP MicroWire)
and three protocol drivers (CS8415a, ADS7846, DataFlash) with LKML
mentions of other drivers in development.
- No userspace API. There are several implementations to compare.
Implement them like any other driver, and bind them with sysfs.
The changes from last version posted to LKML (on 11-Nov-2005) are minor,
and include:
- One bugfix (removes a FIXME), with the visible effect of making device
names be "spiB.C" where B is the bus number and C is the chipselect.
- The "caller provides DMA mappings" mechanism now has kerneldoc, for
DMA drivers that want to be fancy.
- Hey, the framework init can be subsys_init. Even though board init
logic fires earlier, at arch_init ... since the framework init is
for driver support, and the board init support uses static init.
- Various additional spec/doc clarifications based on discussions
with other folk. It adds a brief "thank you" at the end, for folk
who've helped nudge this framework into existence.
As I've said before, I think that "protocol tweaking" is the main support
that this driver framework will need to evolve.
From: Mark Underwood <basicmark@yahoo.com>
Update the SPI framework to remove a potential priority inversion case by
reverting to kmalloc if the pre-allocated DMA-safe buffer isn't available.
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2006-01-08 13:34:19 -08:00
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2014-12-20 15:41:11 -05:00
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[PATCH] spi: simple SPI framework
This is the core of a small SPI framework, implementing the model of a
queue of messages which complete asynchronously (with thin synchronous
wrappers on top).
- It's still less than 2KB of ".text" (ARM). If there's got to be a
mid-layer for something so simple, that's the right size budget. :)
- The guts use board-specific SPI device tables to build the driver
model tree. (Hardware probing is rarely an option.)
- This version of Kconfig includes no drivers. At this writing there
are two known master controller drivers (PXA/SSP, OMAP MicroWire)
and three protocol drivers (CS8415a, ADS7846, DataFlash) with LKML
mentions of other drivers in development.
- No userspace API. There are several implementations to compare.
Implement them like any other driver, and bind them with sysfs.
The changes from last version posted to LKML (on 11-Nov-2005) are minor,
and include:
- One bugfix (removes a FIXME), with the visible effect of making device
names be "spiB.C" where B is the bus number and C is the chipselect.
- The "caller provides DMA mappings" mechanism now has kerneldoc, for
DMA drivers that want to be fancy.
- Hey, the framework init can be subsys_init. Even though board init
logic fires earlier, at arch_init ... since the framework init is
for driver support, and the board init support uses static init.
- Various additional spec/doc clarifications based on discussions
with other folk. It adds a brief "thank you" at the end, for folk
who've helped nudge this framework into existence.
As I've said before, I think that "protocol tweaking" is the main support
that this driver framework will need to evolve.
From: Mark Underwood <basicmark@yahoo.com>
Update the SPI framework to remove a potential priority inversion case by
reverting to kmalloc if the pre-allocated DMA-safe buffer isn't available.
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2006-01-08 13:34:19 -08:00
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2008-07-23 21:29:53 -07:00
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[PATCH] spi: simple SPI framework
This is the core of a small SPI framework, implementing the model of a
queue of messages which complete asynchronously (with thin synchronous
wrappers on top).
- It's still less than 2KB of ".text" (ARM). If there's got to be a
mid-layer for something so simple, that's the right size budget. :)
- The guts use board-specific SPI device tables to build the driver
model tree. (Hardware probing is rarely an option.)
- This version of Kconfig includes no drivers. At this writing there
are two known master controller drivers (PXA/SSP, OMAP MicroWire)
and three protocol drivers (CS8415a, ADS7846, DataFlash) with LKML
mentions of other drivers in development.
- No userspace API. There are several implementations to compare.
Implement them like any other driver, and bind them with sysfs.
The changes from last version posted to LKML (on 11-Nov-2005) are minor,
and include:
- One bugfix (removes a FIXME), with the visible effect of making device
names be "spiB.C" where B is the bus number and C is the chipselect.
- The "caller provides DMA mappings" mechanism now has kerneldoc, for
DMA drivers that want to be fancy.
- Hey, the framework init can be subsys_init. Even though board init
logic fires earlier, at arch_init ... since the framework init is
for driver support, and the board init support uses static init.
- Various additional spec/doc clarifications based on discussions
with other folk. It adds a brief "thank you" at the end, for folk
who've helped nudge this framework into existence.
As I've said before, I think that "protocol tweaking" is the main support
that this driver framework will need to evolve.
From: Mark Underwood <basicmark@yahoo.com>
Update the SPI framework to remove a potential priority inversion case by
reverting to kmalloc if the pre-allocated DMA-safe buffer isn't available.
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2006-01-08 13:34:19 -08:00
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2011-02-14 10:10:43 +08:00
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2011-01-04 21:28:22 +01:00
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2013-03-28 04:34:56 -07:00
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2011-01-04 21:28:22 +01:00
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2016-12-08 15:58:44 +01:00
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2007-02-14 00:33:09 -08:00
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2014-08-29 18:10:31 +02:00
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2013-07-05 19:42:58 +01:00
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2007-02-14 00:33:09 -08:00
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2016-02-02 11:27:42 +00:00
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2016-02-04 17:13:30 +01:00
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2013-03-11 21:38:24 -06:00
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2015-05-04 00:16:36 +09:00
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2013-07-05 19:42:58 +01:00
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2013-03-11 21:38:24 -06:00
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2015-09-11 11:22:04 +00:00
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2016-02-07 15:12:29 +01:00
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2015-09-11 11:22:04 +00:00
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2012-04-23 18:18:08 -04:00
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2007-05-06 14:50:34 -07:00
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2013-06-26 18:07:40 -04:00
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2007-05-06 14:50:34 -07:00
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2014-04-04 16:27:17 +08:00
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2013-06-26 18:07:40 -04:00
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2011-03-28 04:57:11 -04:00
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2014-08-17 18:33:38 +02:00
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2014-09-26 14:18:31 +08:00
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2014-08-17 18:33:38 +02:00
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2012-02-01 11:14:09 +01:00
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2015-10-12 12:24:23 +02:00
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2012-02-01 11:14:09 +01:00
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2013-11-30 12:42:06 +01:00
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2016-08-24 18:04:23 -04:00
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2016-12-30 15:30:00 +09:00
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2016-08-24 18:04:23 -04:00
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2006-01-08 13:34:26 -08:00
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2009-01-06 14:41:41 -08:00
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2006-01-08 13:34:26 -08:00
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[PATCH] spi: simple SPI framework
This is the core of a small SPI framework, implementing the model of a
queue of messages which complete asynchronously (with thin synchronous
wrappers on top).
- It's still less than 2KB of ".text" (ARM). If there's got to be a
mid-layer for something so simple, that's the right size budget. :)
- The guts use board-specific SPI device tables to build the driver
model tree. (Hardware probing is rarely an option.)
- This version of Kconfig includes no drivers. At this writing there
are two known master controller drivers (PXA/SSP, OMAP MicroWire)
and three protocol drivers (CS8415a, ADS7846, DataFlash) with LKML
mentions of other drivers in development.
- No userspace API. There are several implementations to compare.
Implement them like any other driver, and bind them with sysfs.
The changes from last version posted to LKML (on 11-Nov-2005) are minor,
and include:
- One bugfix (removes a FIXME), with the visible effect of making device
names be "spiB.C" where B is the bus number and C is the chipselect.
- The "caller provides DMA mappings" mechanism now has kerneldoc, for
DMA drivers that want to be fancy.
- Hey, the framework init can be subsys_init. Even though board init
logic fires earlier, at arch_init ... since the framework init is
for driver support, and the board init support uses static init.
- Various additional spec/doc clarifications based on discussions
with other folk. It adds a brief "thank you" at the end, for folk
who've helped nudge this framework into existence.
As I've said before, I think that "protocol tweaking" is the main support
that this driver framework will need to evolve.
From: Mark Underwood <basicmark@yahoo.com>
Update the SPI framework to remove a potential priority inversion case by
reverting to kmalloc if the pre-allocated DMA-safe buffer isn't available.
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2006-01-08 13:34:19 -08:00
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2006-01-08 13:34:29 -08:00
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2008-07-23 21:29:53 -07:00
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2006-01-08 13:34:29 -08:00
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2014-04-14 14:36:53 +05:30
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2015-03-09 09:46:15 +01:00
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2014-04-14 14:36:53 +05:30
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2012-11-07 21:30:29 +04:00
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2014-03-26 16:53:18 +08:00
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2012-11-07 21:30:29 +04:00
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2010-01-20 13:49:44 -07:00
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2012-06-05 09:24:59 -07:00
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2010-01-20 13:49:44 -07:00
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2009-12-16 22:02:18 +00:00
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2010-10-12 11:58:02 +05:30
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2013-07-24 20:31:37 -04:00
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2009-12-16 22:02:18 +00:00
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2010-10-12 11:58:02 +05:30
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2016-02-02 11:27:42 +00:00
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2014-12-08 15:52:29 +02:00
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2013-08-08 16:09:50 +02:00
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2010-05-06 04:47:04 +00:00
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2014-08-29 18:10:31 +02:00
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2013-07-05 19:42:58 +01:00
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2010-05-06 04:47:04 +00:00
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2012-05-20 15:46:19 +02:00
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2017-01-03 18:04:27 +01:00
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2012-05-20 15:46:19 +02:00
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2016-11-22 21:52:17 +08:00
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2009-01-06 14:41:41 -08:00
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2015-05-05 18:32:33 +02:00
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2009-01-06 14:41:41 -08:00
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2014-11-14 10:48:32 -08:00
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2009-09-22 16:46:02 -07:00
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2013-07-05 19:42:58 +01:00
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2009-09-22 16:46:02 -07:00
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2016-08-04 04:30:37 +00:00
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2007-07-17 04:04:05 -07:00
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2013-01-16 18:53:55 -08:00
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2007-07-17 04:04:05 -07:00
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2016-02-23 13:44:28 +03:00
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2009-11-04 15:34:18 -07:00
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2011-11-13 22:52:40 +01:00
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2009-11-04 15:34:18 -07:00
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2007-05-10 22:22:52 -07:00
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2013-01-16 18:53:55 -08:00
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2007-05-10 22:22:52 -07:00
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2010-04-30 13:21:27 +00:00
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2012-02-23 10:37:55 +01:00
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2010-04-30 13:21:27 +00:00
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2010-10-12 18:18:31 +08:00
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2013-02-15 16:52:21 +01:00
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2010-10-12 18:18:31 +08:00
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2010-10-12 18:18:30 +08:00
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2015-01-06 14:07:34 +01:00
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2013-02-15 16:52:21 +01:00
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2010-10-12 18:18:31 +08:00
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2013-02-15 16:52:21 +01:00
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2006-05-20 15:00:15 -07:00
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2010-10-12 18:18:30 +08:00
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2013-02-15 16:52:26 +01:00
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2006-05-20 15:00:15 -07:00
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2013-08-16 11:08:55 +08:00
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2014-02-12 15:29:05 +08:00
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2016-12-14 13:28:05 +01:00
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2015-10-28 17:41:59 +08:00
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2013-08-16 11:08:55 +08:00
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spi/fsl_spi: add eSPI controller support
Add eSPI controller support based on the library code spi_fsl_lib.c.
The eSPI controller is newer controller 85xx/Pxxx devices supported.
There're some differences comparing to the SPI controller:
1. Has different register map and different bit definition
So leave the code operated the register to the driver code, not
the common code.
2. Support 4 dedicated chip selects
The software can't controll the chip selects directly, The SPCOM[CS]
field is used to select which chip selects is used, and the
SPCOM[TRANLEN] field is set to tell the controller how long the CS
signal need to be asserted. So the driver doesn't need the chipselect
related function when transfering data, just set corresponding register
fields to controll the chipseclect.
3. Different Transmit/Receive FIFO access register behavior
For SPI controller, the Tx/Rx FIFO access register can hold only
one character regardless of the character length, but for eSPI
controller, the register can hold 4 or 2 characters according to
the character lengths. Access the Tx/Rx FIFO access register of the
eSPI controller will shift out/in 4/2 characters one time. For SPI
subsystem, the command and data are put into different transfers, so
we need to combine all the transfers to one transfer in order to pass
the transfer to eSPI controller.
4. The max transaction length limitation
The max transaction length one time is limitted by the SPCOM[TRANSLEN]
field which is 0xFFFF. When used mkfs.ext2 command to create ext2
filesystem on the flash, the read length will exceed the max value of
the SPCOM[TRANSLEN] field.
Signed-off-by: Mingkai Hu <Mingkai.hu@freescale.com>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2010-10-12 18:18:32 +08:00
|
|
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|
2015-01-06 14:07:34 +01:00
|
|
|
|
spi/fsl_spi: add eSPI controller support
Add eSPI controller support based on the library code spi_fsl_lib.c.
The eSPI controller is newer controller 85xx/Pxxx devices supported.
There're some differences comparing to the SPI controller:
1. Has different register map and different bit definition
So leave the code operated the register to the driver code, not
the common code.
2. Support 4 dedicated chip selects
The software can't controll the chip selects directly, The SPCOM[CS]
field is used to select which chip selects is used, and the
SPCOM[TRANLEN] field is set to tell the controller how long the CS
signal need to be asserted. So the driver doesn't need the chipselect
related function when transfering data, just set corresponding register
fields to controll the chipseclect.
3. Different Transmit/Receive FIFO access register behavior
For SPI controller, the Tx/Rx FIFO access register can hold only
one character regardless of the character length, but for eSPI
controller, the register can hold 4 or 2 characters according to
the character lengths. Access the Tx/Rx FIFO access register of the
eSPI controller will shift out/in 4/2 characters one time. For SPI
subsystem, the command and data are put into different transfers, so
we need to combine all the transfers to one transfer in order to pass
the transfer to eSPI controller.
4. The max transaction length limitation
The max transaction length one time is limitted by the SPCOM[TRANSLEN]
field which is 0xFFFF. When used mkfs.ext2 command to create ext2
filesystem on the flash, the read length will exceed the max value of
the SPCOM[TRANSLEN] field.
Signed-off-by: Mingkai Hu <Mingkai.hu@freescale.com>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2010-10-12 18:18:32 +08:00
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2017-05-23 15:39:33 +02:00
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2014-11-22 16:21:41 +01:00
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2014-11-27 00:07:48 +01:00
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2014-11-22 16:21:41 +01:00
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2015-08-07 15:19:50 +08:00
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2016-02-02 11:27:42 +00:00
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2017-02-14 00:31:11 +01:00
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2017-02-18 17:06:48 +01:00
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2017-02-14 00:31:11 +01:00
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2011-02-14 10:20:39 +08:00
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2015-05-05 18:32:33 +02:00
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2011-02-14 10:20:39 +08:00
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2012-08-22 12:25:07 -07:00
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2013-05-22 15:10:46 +00:00
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2012-08-22 12:25:07 -07:00
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2007-02-12 00:52:37 -08:00
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2008-07-23 21:29:53 -07:00
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2007-02-12 00:52:37 -08:00
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2007-07-17 04:04:13 -07:00
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2010-05-14 12:05:25 -07:00
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2014-08-29 18:10:31 +02:00
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2013-07-05 19:42:58 +01:00
|
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2016-07-07 12:17:49 -05:00
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2007-07-17 04:04:13 -07:00
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2010-05-14 12:05:25 -07:00
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2007-07-17 04:04:13 -07:00
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2007-02-12 00:52:39 -08:00
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2013-08-20 18:55:48 +05:30
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2017-05-04 09:37:18 +02:00
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2013-08-20 18:55:48 +05:30
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2009-12-13 01:02:11 -07:00
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2013-07-05 19:42:58 +01:00
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2009-12-13 01:02:11 -07:00
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2008-08-05 13:01:09 -07:00
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2013-01-16 18:53:55 -08:00
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2016-04-22 15:17:28 +02:00
|
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2008-08-05 13:01:09 -07:00
|
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2016-11-30 11:47:44 +01:00
|
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2008-08-05 13:01:09 -07:00
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2016-04-01 16:48:50 +05:30
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2016-04-15 16:57:19 +05:30
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2016-05-13 14:12:53 +05:30
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2016-04-15 16:57:19 +05:30
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2009-06-09 08:11:42 +01:00
|
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2011-05-19 14:13:19 +02:00
|
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2009-06-09 08:11:42 +01:00
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2009-09-22 16:46:01 -07:00
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2009-06-09 08:11:42 +01:00
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2009-09-22 16:45:58 -07:00
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2012-02-23 10:37:55 +01:00
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2009-09-22 16:45:58 -07:00
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2006-03-07 23:53:24 -08:00
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|
spi: fix building SPI_PXA on MMP
When the audio driver selects CONFIG_PXA_SSP on ARCH_MMP as a
loadable module, and the PXA SPI driver is built-in, we get
a link error in the SPI driver:
drivers/spi/spi-pxa2xx.o: In function `pxa2xx_spi_remove':
spi-pxa2xx.c:(.text+0x5f0): undefined reference to `pxa_ssp_free'
drivers/spi/spi-pxa2xx.o: In function `pxa2xx_spi_probe':
spi-pxa2xx.c:(.text+0xeac): undefined reference to `pxa_ssp_request'
spi-pxa2xx.c:(.text+0x1468): undefined reference to `pxa_ssp_free'
spi-pxa2xx.c:(.text+0x15bc): undefined reference to `pxa_ssp_free'
The problem is that the PXA SPI driver only uses 'select SSP'
specifically when building it for PXA, but we can also build it
for PCI, which is meant for Intel x86 SoCs that use the same SPI
block. When the sound driver forces the SSP to be a loadable
module, the IS_ENABLED() check in include/linux/pxa2xx_ssp.h
triggers but the spi driver can't reference the exported symbols.
I had a different approach before, making the PCI case depend
on X86, which fixed the problem by avoiding the MMP case.
This goes a different route, making the driver select PXA_SSP
also on MMP, which has an SSP that none of the boards in mainline
Linux use for SPI. There is no harm in always enabling the build
on MMP (PCI or not PCI), so I do that too, to document that this
hardware is actually available on MMP.
Link: https://patchwork.kernel.org/patch/8879921/
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Mark Brown <broonie@kernel.org>
2017-08-07 17:42:55 +02:00
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2006-03-07 23:53:24 -08:00
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2010-11-24 10:17:14 +01:00
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2014-07-25 01:10:54 +08:00
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2006-03-07 23:53:24 -08:00
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2014-07-01 09:03:59 +08:00
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2015-04-15 17:43:52 +02:00
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2012-03-07 14:46:25 +09:00
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2014-01-21 16:10:09 +01:00
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2016-02-18 10:47:52 +09:00
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2012-03-07 14:46:25 +09:00
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2014-01-21 16:10:09 +01:00
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2012-03-07 14:46:25 +09:00
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2014-02-13 18:21:38 +02:00
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2014-04-07 16:15:45 +02:00
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2014-02-13 18:21:38 +02:00
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2012-03-07 14:46:25 +09:00
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2007-02-12 00:52:36 -08:00
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2013-01-16 18:53:55 -08:00
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2007-07-17 04:04:09 -07:00
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2007-02-12 00:52:36 -08:00
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2009-12-14 22:20:24 -08:00
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2009-11-30 07:39:42 +00:00
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2016-11-07 17:46:52 -03:00
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2009-11-30 07:39:42 +00:00
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2012-08-18 09:06:27 -07:00
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2009-11-26 11:10:05 +00:00
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2014-07-09 23:27:08 +02:00
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2016-08-31 11:37:05 +02:00
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2009-11-26 11:10:05 +00:00
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2012-11-07 12:40:05 +01:00
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2009-11-26 11:10:05 +00:00
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2011-02-15 10:30:32 +09:00
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2013-07-05 19:42:58 +01:00
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2011-02-15 10:30:32 +09:00
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2008-02-06 01:38:15 -08:00
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2008-07-23 21:29:53 -07:00
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2008-02-06 01:38:15 -08:00
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2012-03-01 17:10:17 -08:00
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2016-02-18 10:47:52 +09:00
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2012-03-01 17:10:17 -08:00
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2012-02-13 17:45:38 +08:00
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2013-08-06 11:37:32 +01:00
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2012-02-13 17:45:38 +08:00
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2017-06-21 16:32:06 +02:00
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2014-12-09 20:21:30 +00:00
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2016-04-29 13:38:41 +08:00
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2014-12-09 20:21:30 +00:00
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spi: sunxi: Add Allwinner A10 SPI controller driver
The older Allwinner SoCs (A10, A13, A10s and A20) all have the same SPI
controller.
Unfortunately, this SPI controller, even though quite similar, is significantly
different from the recently supported A31 SPI controller (different registers
offset, split/merged registers, etc.). Supporting both controllers in a single
driver would be unreasonable, hence the addition of a new driver.
Like its more recent counterpart, it supports DMA, but the driver only does PIO
until we have a dmaengine driver for this platform.
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Signed-off-by: Mark Brown <broonie@linaro.org>
2014-02-22 22:35:53 +01:00
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2014-02-05 14:05:05 +01:00
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2014-02-06 10:53:51 +00:00
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2014-02-05 14:05:05 +01:00
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2012-08-03 17:26:11 +02:00
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2013-02-22 18:07:39 +05:30
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2013-07-05 19:42:58 +01:00
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2014-08-29 18:10:31 +02:00
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2013-02-22 18:07:39 +05:30
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2012-11-14 05:54:47 +05:30
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2013-07-05 19:42:58 +01:00
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2013-11-06 16:31:24 -07:00
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2012-11-14 05:54:47 +05:30
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2012-10-30 12:34:05 +05:30
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2013-07-05 19:42:58 +01:00
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2014-08-29 18:10:31 +02:00
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2012-10-30 12:34:05 +05:30
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2016-08-19 16:03:20 +02:00
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2010-10-08 12:44:49 -06:00
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2011-10-28 09:35:21 +09:00
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2015-11-30 16:21:42 +00:00
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2010-10-08 12:44:49 -06:00
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2010-10-08 12:56:13 -06:00
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2010-10-08 12:44:49 -06:00
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2011-10-28 09:35:21 +09:00
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2011-06-07 14:50:10 +09:00
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2007-07-17 04:04:15 -07:00
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2013-07-05 19:42:58 +01:00
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2007-07-17 04:04:15 -07:00
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2012-07-19 18:44:07 +02:00
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2007-07-17 04:04:11 -07:00
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2009-11-13 12:28:55 +01:00
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2013-01-16 18:53:55 -08:00
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2007-07-17 04:04:11 -07:00
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2009-11-13 12:28:55 +01:00
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2015-08-27 17:49:28 +05:30
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2017-03-12 11:11:43 +00:00
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2015-08-27 17:49:28 +05:30
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2014-03-12 21:55:24 +04:00
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2014-03-20 18:08:04 +08:00
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2014-03-12 21:55:24 +04:00
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2015-06-10 16:08:21 +05:30
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2015-06-26 14:07:12 +02:00
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2015-06-10 16:08:21 +05:30
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[PATCH] spi: simple SPI framework
This is the core of a small SPI framework, implementing the model of a
queue of messages which complete asynchronously (with thin synchronous
wrappers on top).
- It's still less than 2KB of ".text" (ARM). If there's got to be a
mid-layer for something so simple, that's the right size budget. :)
- The guts use board-specific SPI device tables to build the driver
model tree. (Hardware probing is rarely an option.)
- This version of Kconfig includes no drivers. At this writing there
are two known master controller drivers (PXA/SSP, OMAP MicroWire)
and three protocol drivers (CS8415a, ADS7846, DataFlash) with LKML
mentions of other drivers in development.
- No userspace API. There are several implementations to compare.
Implement them like any other driver, and bind them with sysfs.
The changes from last version posted to LKML (on 11-Nov-2005) are minor,
and include:
- One bugfix (removes a FIXME), with the visible effect of making device
names be "spiB.C" where B is the bus number and C is the chipselect.
- The "caller provides DMA mappings" mechanism now has kerneldoc, for
DMA drivers that want to be fancy.
- Hey, the framework init can be subsys_init. Even though board init
logic fires earlier, at arch_init ... since the framework init is
for driver support, and the board init support uses static init.
- Various additional spec/doc clarifications based on discussions
with other folk. It adds a brief "thank you" at the end, for folk
who've helped nudge this framework into existence.
As I've said before, I think that "protocol tweaking" is the main support
that this driver framework will need to evolve.
From: Mark Underwood <basicmark@yahoo.com>
Update the SPI framework to remove a potential priority inversion case by
reverting to kmalloc if the pre-allocated DMA-safe buffer isn't available.
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2006-01-08 13:34:19 -08:00
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2007-05-08 00:32:15 -07:00
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2015-11-27 16:17:21 +00:00
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2007-07-17 04:04:10 -07:00
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2008-07-23 21:29:53 -07:00
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2007-07-17 04:04:10 -07:00
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|
[PATCH] spi: simple SPI framework
This is the core of a small SPI framework, implementing the model of a
queue of messages which complete asynchronously (with thin synchronous
wrappers on top).
- It's still less than 2KB of ".text" (ARM). If there's got to be a
mid-layer for something so simple, that's the right size budget. :)
- The guts use board-specific SPI device tables to build the driver
model tree. (Hardware probing is rarely an option.)
- This version of Kconfig includes no drivers. At this writing there
are two known master controller drivers (PXA/SSP, OMAP MicroWire)
and three protocol drivers (CS8415a, ADS7846, DataFlash) with LKML
mentions of other drivers in development.
- No userspace API. There are several implementations to compare.
Implement them like any other driver, and bind them with sysfs.
The changes from last version posted to LKML (on 11-Nov-2005) are minor,
and include:
- One bugfix (removes a FIXME), with the visible effect of making device
names be "spiB.C" where B is the bus number and C is the chipselect.
- The "caller provides DMA mappings" mechanism now has kerneldoc, for
DMA drivers that want to be fancy.
- Hey, the framework init can be subsys_init. Even though board init
logic fires earlier, at arch_init ... since the framework init is
for driver support, and the board init support uses static init.
- Various additional spec/doc clarifications based on discussions
with other folk. It adds a brief "thank you" at the end, for folk
who've helped nudge this framework into existence.
As I've said before, I think that "protocol tweaking" is the main support
that this driver framework will need to evolve.
From: Mark Underwood <basicmark@yahoo.com>
Update the SPI framework to remove a potential priority inversion case by
reverting to kmalloc if the pre-allocated DMA-safe buffer isn't available.
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2006-01-08 13:34:19 -08:00
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2008-07-23 21:29:53 -07:00
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2017-05-22 15:11:41 +02:00
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2017-05-22 15:11:44 +02:00
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2017-05-22 15:11:45 +02:00
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2017-05-22 15:11:41 +02:00
|
|
|
|
[PATCH] spi: simple SPI framework
This is the core of a small SPI framework, implementing the model of a
queue of messages which complete asynchronously (with thin synchronous
wrappers on top).
- It's still less than 2KB of ".text" (ARM). If there's got to be a
mid-layer for something so simple, that's the right size budget. :)
- The guts use board-specific SPI device tables to build the driver
model tree. (Hardware probing is rarely an option.)
- This version of Kconfig includes no drivers. At this writing there
are two known master controller drivers (PXA/SSP, OMAP MicroWire)
and three protocol drivers (CS8415a, ADS7846, DataFlash) with LKML
mentions of other drivers in development.
- No userspace API. There are several implementations to compare.
Implement them like any other driver, and bind them with sysfs.
The changes from last version posted to LKML (on 11-Nov-2005) are minor,
and include:
- One bugfix (removes a FIXME), with the visible effect of making device
names be "spiB.C" where B is the bus number and C is the chipselect.
- The "caller provides DMA mappings" mechanism now has kerneldoc, for
DMA drivers that want to be fancy.
- Hey, the framework init can be subsys_init. Even though board init
logic fires earlier, at arch_init ... since the framework init is
for driver support, and the board init support uses static init.
- Various additional spec/doc clarifications based on discussions
with other folk. It adds a brief "thank you" at the end, for folk
who've helped nudge this framework into existence.
As I've said before, I think that "protocol tweaking" is the main support
that this driver framework will need to evolve.
From: Mark Underwood <basicmark@yahoo.com>
Update the SPI framework to remove a potential priority inversion case by
reverting to kmalloc if the pre-allocated DMA-safe buffer isn't available.
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2006-01-08 13:34:19 -08:00
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2008-04-28 02:14:16 -07:00
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