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* spi: add spi_master flag wordDavid Brownell2009-06-301-0/+4
| | | | | | | | | | | | | | | | | | | | Add a new spi_master.flags word listing constraints relevant to that controller. Define the first constraint bit: a half duplex restriction. Include that constraint in the OMAP1 MicroWire controller driver. Have the mmc_spi host be the first customer of this flag. Its coding relies heavily on full duplex transfers, so it must fail when the underlying controller driver won't perform them. (The spi_write_then_read routine could use it too: use the temporarily-withdrawn full-duplex speedup unless this flag is set, in which case the existing code applies. Similarly, any spi_master implementing only SPI_3WIRE should set the flag.) Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Cc: Marek Szyprowski <m.szyprowski@samsung.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* spi: new spi->mode bitsDavid Brownell2009-06-302-0/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Add two new spi_device.mode bits to accomodate more protocol options, and pass them through to usermode drivers: * SPI_NO_CS ... a second 3-wire variant, where the chipselect line is removed instead of a data line; transfers are still full duplex. This obviously has STRONG protocol implications since the chipselect transitions can't be used to synchronize state transitions with the SPI master. * SPI_READY ... defines open drain signal that's pulled low to pause the clock. This defines a 5-wire variant (normal 4-wire SPI plus READY) and two 4-wire variants (READY plus each of the 3-wire flavors). Such hardware flow control can be a big win. There are ADC converters and flash chips that expose READY signals, but not many host controllers support it today. The spi_bitbang code should be changed to use SPI_NO_CS instead of its current nonportable hack. That's a mode most hardware can easily support (unlike SPI_READY). Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Cc: "Paulraj, Sandeep" <s-paulraj@ti.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* Merge branch 'for-linus' of ↵Linus Torvalds2009-06-201-0/+1
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input: (35 commits) Input: add driver for Synaptics I2C touchpad Input: synaptics - add support for reporting x/y resolution Input: ALPS - handle touchpoints buttons correctly Input: gpio-keys - change timer to workqueue Input: ads7846 - pin change interrupt support Input: add support for touchscreen on W90P910 ARM platform Input: appletouch - improve finger detection Input: wacom - clear Intuos4 wheel data when finger leaves proximity Input: ucb1400 - move static function from header into core Input: add driver for EETI touchpanels Input: ads7846 - more detailed model name in sysfs Input: ads7846 - support swapping x and y axes Input: ati_remote2 - use non-atomic bitops Input: introduce lm8323 keypad driver Input: psmouse - ESD workaround fix for OLPC XO touchpad Input: tsc2007 - make sure platform provides get_pendown_state() Input: uinput - flush all pending ff effects before destroying device Input: simplify name handling for certain input handles Input: serio - do not use deprecated dev.power.power_state Input: wacom - add support for Intuos4 tablets ...
| * Input: ads7846 - support swapping x and y axesMichael Roth2009-05-191-0/+1
| | | | | | | | | | Signed-off-by: Michael Roth <mroth@nessie.de> Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
* | spi: move more spi_setup() functionality into coreDavid Brownell2009-06-181-0/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Move some common spi_setup() error checks into the SPI framework from the spi_master controller drivers: - Add a new "mode_bits" field to spi_master - Use that in spi_setup to validate the spi->mode value being requested. Setting this new field is now mandatory for any controller supporting more than vanilla SPI_MODE_0. - Update all spi_master drivers to: * Initialize that field * Remove current spi_setup() checks using that value. This is a net minor code shrink. Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | spi: move common spi_setup() functionality into coreDavid Brownell2009-06-181-24/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Start moving some spi_setup() functionality into the SPI core from the various spi_master controller drivers: - Make that function stop being an inline; - Move two common idioms from drivers into that new function: * Default bits_per_word to 8 if that field isn't set * Issue a standardized dev_dbg() message This is a net minor source code shrink, and supports enhancments found in some follow-up patches. Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | net/libertas: remove GPIO-CS handling in SPI interface codeSebastian Andrzej Siewior2009-06-101-3/+0
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This removes the dependency on GPIO framework and lets the SPI host driver handle the chip select. The SPI host driver is required to keep the CS active for the entire message unless cs_change says otherwise. This patch collects the two/three single SPI transfers into a message. Also the delay in read path in case use_dummy_writes are not used is moved into the SPI host driver. Tested-by: Mike Rapoport <mike@compulab.co.il> Tested-by: Andrey Yurovsky <andrey@cozybit.com> Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Acked-by: Dan Williams <dcbw@redhat.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
* | Merge branch 'master' of ↵David S. Miller2009-05-182-1/+7
|\| | | | | | | | | | | | | master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6 Conflicts: drivers/scsi/fcoe/fcoe.c
| * spi: documentation: emphasise spi_master.setup() semanticsDavid Brownell2009-04-211-1/+6
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This is a doc-only patch which I hope will reduce the number of spi_master controller driver patches starting out with a common implementation bug. (As in: almost every spi_master driver I see starts out with its version of this bug. Sigh.) It just re-emphasizes that the setup() method may be called for one device while a transfer is active on another ... which means that most driver implementations shouldn't touch any registers. Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| * Merge branch 'next' into for-linusDmitry Torokhov2009-04-161-0/+1
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| | * Input: ads7846 - introduce platform specific way to synchronize samplingEric Miao2009-04-111-0/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | Noises can be introduced when LCD signals are being driven, some platforms provide a signal to assist the synchronization of this sampling procedure. Signed-off-by: Eric Miao <eric.miao@marvell.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
* | | wl12xx: add driverKalle Valo2009-05-061-0/+31
|/ / | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | wl12xx is a driver for TI wl1251 802.11 chipset designed for embedded devices, supporting both SDIO and SPI busses. Currently the driver supports only SPI. Adding support 1253 (the 5 GHz version) should be relatively easy. More information here: http://focus.ti.com/general/docs/wtbu/wtbuproductcontent.tsp?contentId=4711&navigationId=12494&templateId=6123 (Collapsed original sequence of pre-merge patches into single commit for initial merge. -- JWL) Signed-off-by: Kalle Valo <kalle.valo@nokia.com> Signed-off-by: Bob Copeland <me@bobcopeland.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
* | Merge branch 'next' into for-linusDmitry Torokhov2009-04-081-0/+35
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| * Input: add AD7879 Touchscreen driverMichael Hennerich2009-03-091-0/+35
| | | | | | | | | | | | | | | | | | | | [randy.dunlap@oracle.com: don't use bus_id] [dtor@mail.ru: locking and other fixups] Signed-off-by: Michael Hennerich <michael.hennerich@analog.com> Signed-off-by: Bryan Wu <cooloney@kernel.org> Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
* | SPI: add dma_alignment field to spi_masterMike Rapoport2009-04-071-0/+6
| | | | | | | | | | | | | | | | | | | | | | | | | | | | Some SPI controllers have restrictions on DMAable buffers alignemt. Currently if the buffer supplied by protocol driver is not properly aligned, the controller silently performs transfer in PIO mode. Addition of dma_alignment field to spi_master allows protocol drivers to perform proper alignment. Signed-off-by: Mike Rapoport <mike@compulab.co.il> Cc: Bryan Wu <bryan.wu@analog.com> Cc: David Brownell <david-b@pacbell.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | spi-gpio: allow operation without CS signalMichael Buesch2009-04-021-0/+6
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Change spi-gpio so that it is possible to drive SPI communications over GPIO without the need for a chipselect signal. This is useful in very small setups where there's only one slave device on the bus. This patch does not affect existing setups. I use this for a tiny communication channel between an embedded device and a microcontroller. There are not enough GPIOs available for chipselect and it's not needed anyway in this case. Signed-off-by: Michael Buesch <mb@bu3sch.de> Cc: David Brownell <david-b@pacbell.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | memory_accessor: implement the new memory_accessor interfaces for SPI EEPROMsDavid Brownell2009-04-021-0/+6
| | | | | | | | | | | | | | | | | | | | | | | | | | | | - Define new setup() hook to export the accessor - Implement accessor methods Moves some error checking out of the sysfs interface code into the layer below it, which is now shared by both sysfs and memory access code. Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com> Cc: Jean Delvare <khali@linux-fr.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | Merge branch 'master' of /home/davem/src/GIT/linux-2.6/David S. Miller2009-02-241-0/+7
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| * spi_bitbang: add more lowlevel function documentationMichael Buesch2009-02-201-0/+7
| | | | | | | | | | | | | | | | | | This adds more documentation of the lowlevel API to avoid future bugs. Signed-off-by: Michael Buesch <mb@bu3sch.de> Acked-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | libertas: if_spi: add ability to call board specific setup/teardown methodsMike Rapoport2009-02-091-0/+7
| | | | | | | | | | | | | | | | | | | | | | | | | | In certain cases it is required to perform board specific actions before activating libertas G-SPI interface. These actions may include power up of the chip, GPIOs setup, proper pin-strapping and SPI controller config. This patch adds ability to call board specific setup/teardown methods Signed-off-by: Mike Rapoport <mike@compulab.co.il> Acked-by: Andrey Yurovsky <andrey@cozybit.com> Acked-by: Dan Williams <dcbw@redhat.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
* | Merge branch 'master' of ↵David S. Miller2009-02-031-0/+25
|\ \ | |/ |/| | | git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless-next-2.6
| * libertas: if_spi, driver for libertas GSPI devicesColin McCabe2009-01-291-0/+25
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Add initial support for libertas devices using a GSPI interface. This has been tested with the 8686. GSPI is intended to be used on embedded systems. Board-specific parameters are required (see libertas_spi.h). Thanks to everyone who took a look at the earlier versions of the patch. Signed-off-by: Colin McCabe <colin@cozybit.com> Signed-off-by: Andrey Yurovsky <andrey@cozybit.com> Acked-by: Dan Williams <dcbw@redhat.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
* | headers_check fix: spi/spidev.hJaswinder Singh Rajput2009-01-301-0/+1
|/ | | | | | | | fix the following 'make headers_check' warning: usr/include/linux/spi/spidev.h:83: found __[us]{8,16,32,64} type without #include <linux/types.h> Signed-off-by: Jaswinder Singh Rajput <jaswinderrajput@gmail.com>
* backlight: add support for Toppoly TDO35S series to tdo24m lcd driverMike Rapoport2009-01-081-0/+13
| | | | | | Signed-off-by: Mike Rapoport <mike@compulab.co.il> Acked-by: Eric Miao <eric.miao@marvell.com> Signed-off-by: Richard Purdie <rpurdie@linux.intel.com>
* Merge branch 'for-linus' of ↵Linus Torvalds2009-01-071-2/+2
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial: (24 commits) trivial: chack -> check typo fix in main Makefile trivial: Add a space (and a comma) to a printk in 8250 driver trivial: Fix misspelling of "firmware" in docs for ncr53c8xx/sym53c8xx trivial: Fix misspelling of "firmware" in powerpc Makefile trivial: Fix misspelling of "firmware" in usb.c trivial: Fix misspelling of "firmware" in qla1280.c trivial: Fix misspelling of "firmware" in a100u2w.c trivial: Fix misspelling of "firmware" in megaraid.c trivial: Fix misspelling of "firmware" in ql4_mbx.c trivial: Fix misspelling of "firmware" in acpi_memhotplug.c trivial: Fix misspelling of "firmware" in ipw2100.c trivial: Fix misspelling of "firmware" in atmel.c trivial: Fix misspelled firmware in Kconfig trivial: fix an -> a typos in documentation and comments trivial: fix then -> than typos in comments and documentation trivial: update Jesper Juhl CREDITS entry with new email trivial: fix singal -> signal typo trivial: Fix incorrect use of "loose" in event.c trivial: printk: fix indentation of new_text_line declaration trivial: rtc-stk17ta8: fix sparse warning ...
| * trivial: fix then -> than typos in comments and documentationFrederik Schwarzer2009-01-061-2/+2
| | | | | | | | | | | | | | - (better, more, bigger ...) then -> (...) than Signed-off-by: Frederik Schwarzer <schwarzerf@gmail.com> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
* | spi_gpio driverDavid Brownell2009-01-061-0/+60
|/ | | | | | | | | | | | | | | | | | | | | | | | | | | | | Generalize the old at91rm9200 "bootstrap" bitbanging SPI master driver as "spi_gpio", so it works with arbitrary GPIOs and can be configured through platform_data. Such SPI masters support: - any number of bus instances (bus_num is the platform_device.id) - any number of chipselects (one GPIO per spi_device) - all four SPI_MODE values, and SPI_CS_HIGH - i/o word sizes from 1 to 32 bits; - devices configured as with any other spi_master controller When configured using platform_data, this provides relatively low clock rates. On platforms that support inlined GPIO calls, significantly improved transfer speeds are also possible with a semi-custom driver. (It's still painful when accessing flash memory, but less so.) Sanity checked by using this version to replace both native controllers on a board with six different SPI slaves, relying on three different SPI_MODE_* values and both SPI_CS_HIGH settings for correct operation. [akpm@linux-foundation.org: cleanups] Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Acked-by: Magnus Damm <damm@igel.co.jp> Tested-by: Magnus Damm <damm@igel.co.jp> Cc: Torgil Svensson <torgil.svensson@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* spi.h uses/needs device.hRandy Dunlap2009-01-041-0/+2
| | | | | | | | | | | | | | | Include header files as used/needed: In file included from drivers/leds/leds-dac124s085.c:16: include/linux/spi/spi.h:66: error: field 'dev' has incomplete type include/linux/spi/spi.h: In function 'to_spi_device': include/linux/spi/spi.h:100: warning: type defaults to 'int' in declaration of '__mptr' ... Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com> Cc: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* mmc_spi: Add support for OpenFirmware bindingsAnton Vorontsov2008-12-311-1/+14
| | | | | | | | | | The support is implemented via platform data accessors, new module (of_mmc_spi) will be created automatically when the driver compiles on OpenFirmware platforms. Link-time dependency will load the module automatically. Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com> Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
* spi: fix compile errorFernando Luis Vazquez Cao2008-10-301-0/+3
| | | | | | | | | | | | | | | | | Fix compile error below: LD drivers/spi/built-in.o CC [M] drivers/spi/spi_gpio.o In file included from drivers/spi/spi_gpio.c:26: include/linux/spi/spi_bitbang.h:23: error: field `work' has incomplete type make[2]: *** [drivers/spi/spi_gpio.o] Error 1 make[1]: *** [drivers/spi] Error 2 make: *** [drivers] Error 2 Signed-off-by: Fernando Luis Vazquez Cao <fernando@oss.ntt.co.jp> Cc: David Brownell <david-b@pacbell.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* orion_spi: handle 88F6183 erratumLennert Buytenhek2008-10-161-0/+1
| | | | | | | | | | Add support to orion_spi for the 88F6183 ARM SoC by adding code to work around a 6183-specific erratum. Signed-off-by: Lennert Buytenhek <buytenh@marvell.com> Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* [ARM] corgi_lcd: use GPIO API for BACKLIGHT_ON and BACKLIGHT_CONTEric Miao2008-09-251-0/+3
| | | | | Signed-off-by: Eric Miao <eric.miao@marvell.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
* lcd: add corgibl_limit_intensity() to corgi_lcdEric Miao2008-09-231-0/+1
| | | | | | | | | | This is not generic enough, added here for backward compatibility. And make this an individual commit so future revert will be a bit easier. Signed-off-by: Eric Miao <eric.miao@marvell.com> Cc: Richard Purdie <rpurdie@rpsys.net> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
* lcd: add SPI-based LCD and backlight driver for SHARP corgi/spitzEric Miao2008-09-231-0/+16
| | | | | | | | | | | | | The driver is based on different source files including corgi_ssp.c, corgi_lcd.c and corgi_bl.c, previously authored by Richard Purdie and many others. The LCD and Backlight device actually share the same SPI device, so they are made into this single driver. Signed-off-by: Eric Miao <eric.miao@marvell.com> Cc: Richard Purdie <rpurdie@rpsys.net> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
* Input: ads7846 - introduce .gpio_pendown to get pendown stateEric Miao2008-09-171-0/+3
| | | | | | | | | The GPIO connected to ADS7846 nPENIRQ signal is usually used to get the pendown state as well. Introduce a .gpio_pendown, and use this to decide the pendown state if .get_pendown_state is NULL. Signed-off-by: Eric Miao <eric.miao@marvell.com> Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
* spi: new orion_spi driverShadi Ammouri2008-08-051-0/+17
| | | | | | | | | | | | | | This adds an SPI driver for the SPI controller found in various Marvell Orion ARM SoCs. It currently supports only one slave, which must use SPI mode 0. [dbrownell@users.sourceforge.net: cleanups, meet specs, pass "sparse"] Signed-off-by: Shadi Ammouri <shadi@marvell.com> Signed-off-by: Saeed Bishara <saeed@marvell.com> Signed-off-by: Lennert Buytenhek <buytenh@marvell.com> Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* spi: split up spi_new_device() to allow two stage registration.Grant Likely2008-07-251-0/+12
| | | | | | | | | | | | | | | | | | | | | | | | | | spi_new_device() allocates and registers an spi device all in one swoop. If the driver needs to add extra data to the spi_device before it is registered, then this causes problems. This is needed for OF device tree support so that the SPI device tree helper can add a pointer to the device node after the device is allocated, but before the device is registered. OF aware SPI devices can then retrieve data out of the device node to populate a platform data structure. This patch splits the allocation and registration portions of code out of spi_new_device() and creates two new functions; spi_alloc_device() and spi_register_device(). spi_new_device() is modified to use the new functions for allocation and registration. None of the existing users of spi_new_device() should be affected by this change. Drivers using the new API can forego the use of spi_board_info structure to describe the device layout and populate data into the spi_device structure directly. This change is in preparation for adding an OF device tree parser to generate spi_devices based on data in the device tree. Signed-off-by: Grant Likely <grant.likely@secretlab.ca> Acked-by: David Brownell <dbrownell@users.sourceforge.net>
* gpio: mcp23s08 handles multiple chips per chipselectDavid Brownell2008-07-251-9/+16
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Teach the mcp23s08 driver about a curious feature of these chips: up to four of them can share the same chipselect, with the SPI signals wired in parallel, by matching two bits in the first protocol byte against two address lines on the chip. This is handled by three software changes: * Platform data now holds an array of per-chip structs, not just one chip's address and pullup configuration. * Probe() and remove() now use another level of structure, wrapping an instance of the original structure for each mcp23s08 chip sharing that chipselect. * The HAEN bit is set, so that the hardware address bits can no longer be ignored (boot firmware may not have enabled them). The "one struct per chip" preserves the guts of the current code, but platform_data will need minor changes. OLD: /* incorrect "slave" ID may not have mattered */ .slave = 3, .pullups = BIT(3) | BIT(1) | BIT(0), NEW: /* slave address _must_ match chip's wiring */ .chip[3] = { .is_present = true, .pullups = BIT(3) | BIT(1) | BIT(0), }, There's no change in how things _behave_ for spi_device nodes with a single mcp23s08 chip. New multi-chip configurations assign GPIOs in sequence, without holes. The spi_device just resembles a bigger controller, but internally it has multiple gpio_chip instances. Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* rtc: ds1305/ds1306 driverDavid Brownell2008-07-241-0/+35
| | | | | | | | | | | | | Support the Dallas/Maxim DS1305 and DS1306 RTC chips. These use SPI, and support alarms, NVRAM, and a trickle charger for use when their backup power supply is a supercap or rechargeable cell. This basic driver doesn't yet support suspend/resume or wakealarms. Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Cc: Alessandro Zummo <a.zummo@towertech.it> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* spi: make spi_board_info.modalias a char arrayGrant Likely2008-07-241-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Currently, 'modalias' in the spi_device structure is a 'const char *'. The spi_new_device() function fills in the modalias value from a passed in spi_board_info data block. Since it is a pointer copy, the new spi_device remains dependent on the spi_board_info structure after the new spi_device is registered (no other fields in spi_device directly depend on the spi_board_info structure; all of the other data is copied). This causes a problem when dynamically propulating the list of attached SPI devices. For example, in arch/powerpc, the list of SPI devices can be populated from data in the device tree. With the current code, the device tree adapter must kmalloc() a new spi_board_info structure for each new SPI device it finds in the device tree, and there is no simple mechanism in place for keeping track of these allocations. This patch changes modalias from a 'const char *' to a fixed char array. By copying the modalias string instead of referencing it, the dependency on the spi_board_info structure is eliminated and an outside caller does not need to maintain a separate spi_board_info allocation for each device. If searched through the code to the best of my ability for any references to modalias which may be affected by this change and haven't found anything. It has been tested with the lite5200b platform in arch/powerpc. [dbrownell@users.sourceforge.net: cope with linux-next changes: KOBJ_NAME_LEN obliterated, etc] Signed-off-by: Grant Likely <grant.likely@secretlab.ca> Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* Merge git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core-2.6Linus Torvalds2008-07-221-1/+1
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core-2.6: (79 commits) arm: bus_id -> dev_name() and dev_set_name() conversions sparc64: fix up bus_id changes in sparc core code 3c59x: handle pci_name() being const MTD: handle pci_name() being const HP iLO driver sysdev: Convert the x86 mce tolerant sysdev attribute to generic attribute sysdev: Add utility functions for simple int/ulong variable sysdev attributes sysdev: Pass the attribute to the low level sysdev show/store function driver core: Suppress sysfs warnings for device_rename(). kobject: Transmit return value of call_usermodehelper() to caller sysfs-rules.txt: reword API stability statement debugfs: Implement debugfs_remove_recursive() HOWTO: change email addresses of James in HOWTO always enable FW_LOADER unless EMBEDDED=y uio-howto.tmpl: use unique output names uio-howto.tmpl: use standard copyright/legal markings sysfs: don't call notify_change sysdev: fix debugging statements in registration code. kobject: should use kobject_put() in kset-example kobject: reorder kobject to save space on 64 bit builds ...
| * driver core: remove KOBJ_NAME_LEN defineKay Sievers2008-07-211-1/+1
| | | | | | | | | | | | | | | | | | Kobjects do not have a limit in name size since a while, so stop pretending that they do. Signed-off-by: Kay Sievers <kay.sievers@vrfy.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* | gpio: gpio driver for max7301 SPI GPIO expanderJuergen Beisert2008-07-221-0/+9
|/ | | | | | | | | | | | | | | Maxim's MAX7301 is an SPI GPIO expander with 28 GPIOs. Note: MAX7301's interrupt feature is not supported yet. [akpm@linux-foundation.org: coding-style fixes] [g.liakhovetski@pengutronix.de: Fix inaccuracies in comments, check spi_setup() return code, mask off high byte in max7301_read()] Signed-off-by: Juergen Beisert <j.beisert@pengutronix.de> Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@pengutronix.de> Cc: Russell King <rmk@arm.linux.org.uk> Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* mmc_spi: add support for card-detection pollingAnton Vorontsov2008-07-151-0/+9
| | | | | | | | | | | | This patch adds new platform data variable "caps", so platforms could pass theirs capabilities into MMC core (for example, platforms without interrupt on the CD line will most probably want to pass MMC_CAP_NEEDS_POLL). New platform get_cd() callback provided to optimize polling. Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com> Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
* mmc_spi: mmc_spi.h should include linux/interrupts.hAnton Vorontsov2008-06-021-0/+2
| | | | | | | | | | Since mmc_spi.h uses irqreturn_t type, it should include appropriate header, otherwise build will break if users didn't include it (some of them do not use interrupts). Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com> Signed-off-by: Pierre Ossman <drzeus@drzeus.cx> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* Input: ads7846 - simplify support of external vREF (and ads7843)David Brownell2008-04-021-1/+2
| | | | | | | | | This updates the ads7846 driver to handle external vREF (required on boards using ads7843 chips) without module parameters, and also removes a needless variable with its associated bogus gcc warning. Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
* mcp23s08 spi gpio expander supportDavid Brownell2008-02-051-0/+24
| | | | | | | | | | | | | | | | Basic driver for 8-bit SPI based MCP23S08 GPIO expander, without support for IRQs or the shared chipselect mechanism. Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Cc: Jean Delvare <khali@linux-fr.org> Cc: Eric Miao <eric.miao@marvell.com> Cc: Sam Ravnborg <sam@ravnborg.org> Cc: Haavard Skinnemoen <hskinnemoen@atmel.com> Cc: Philipp Zabel <philipp.zabel@gmail.com> Cc: Russell King <rmk@arm.linux.org.uk> Cc: Ben Gardner <bgardner@wabtec.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* Merge branch 'linus' of master.kernel.org:/pub/scm/linux/kernel/git/perex/alsaLinus Torvalds2007-10-161-0/+25
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * 'linus' of master.kernel.org:/pub/scm/linux/kernel/git/perex/alsa: (264 commits) [ALSA] version 1.0.15 [ALSA] Fix thinko in cs4231 mce down check [ALSA] sun-cs4231: improved waiting after MCE down [ALSA] sun-cs4231: use cs4231-regs.h [ALSA] This simplifies and fixes waiting loops of the mce_down() [ALSA] This patch adds support for a wavetable chip on [ALSA] This patch removes open_mutex from the ad1848-lib as [ALSA] fix bootup crash in snd_gus_interrupt() [ALSA] hda-codec - Fix SKU ID function for realtek codecs [ALSA] Support ASUS P701 eeepc [0x1043 0x82a1] support [ALSA] hda-codec - Add array terminator for dmic in STAC codec [ALSA] hdsp - Fix zero division [ALSA] usb-audio - Fix double comment [ALSA] hda-codec - Fix STAC922x volume knob control [ALSA] Changed Jaroslav Kysela's e-mail from perex@suse.cz to perex@perex.cz [ALSA] hda-codec - Fix for Fujitsu Lifebook C1410 [ALSA] mpu-401: remove MPU401_INFO_UART_ONLY flag [ALSA] mpu-401: do not require an ACK byte for the ENTER_UART command [ALSA] via82xx - Add DXS quirk for Shuttle AK31v2 [ALSA] hda-codec - Fix input_mux numbers for vaio stac92xx ...
| * [ALSA] ALSA sound driver for the AT73C213 DAC using Atmel SSC driverHans-Christian Egtvedt2007-10-161-0/+25
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch adds support for the AT73C213 DAC using the misc Atmel SSC driver in I2S mode. The driver also requires a SPI to setup the registers and control volume. It has been tested with an AT32AP7000 on the ATSTK1000 development board. The driver should also work with any Atmel device with an SSC module supported by the Atmel SSC driver (atmel-ssc). The atmel-ssc driver is just submitted to the Linux kernel. Please see mail thread http://lkml.org/lkml/2007/7/16/32 Signed-off-by: Hans-Christian Egtvedt <hcegtvedt@atmel.com> Signed-off-by: Takashi Iwai <tiwai@suse.de> Signed-off-by: Jaroslav Kysela <perex@suse.cz>
* | spi doesn't need class_deviceTony Jones2007-10-161-6/+6
|/ | | | | | | | | | | | Make the SPI framework and drivers stop using class_device. Update docs accordingly ... highlighting just which sysfs paths should be "safe"/stable. Signed-off-by: Tony Jones <tonyj@suse.de> Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Cc: Greg KH <greg@kroah.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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