aboutsummaryrefslogtreecommitdiff
path: root/include/linux/spi
AgeCommit message (Collapse)AuthorFilesLines
2016-03-11Merge remote-tracking branches 'spi/topic/doc', 'spi/topic/dw' and ↵Mark Brown1-0/+2
'spi/topic/flash' into spi-next
2016-03-11Merge remote-tracking branches 'spi/topic/acpi', 'spi/topic/axi-engine', ↵Mark Brown1-0/+5
'spi/topic/bcm2835' and 'spi/topic/bcm2835aux' into spi-next
2016-03-11spi: Fix htmldocs build error due struct spi_replaced_transfersJavier Martinez Canillas1-4/+4
The kernel-doc has to be just before the structure definition but the one for struct spi_replaced_transfers was before a structure declaration and that confuses kernel-doc which complains with the following build error: .//include/linux/spi/spi.h:933: error: Cannot parse struct or union! Signed-off-by: Javier Martinez Canillas <[email protected]> Signed-off-by: Mark Brown <[email protected]>
2016-03-08Input: ad7879 - move header to platform_data directoryStefan Agner1-41/+0
The header file is used by the SPI and I2C variant of the driver. Therefore, move it to a more generic place under platform_data. Signed-off-by: Stefan Agner <[email protected]> Signed-off-by: Dmitry Torokhov <[email protected]>
2016-03-01eeprom: at25: Remove in kernel API for accessing the EEPROMAndrew Lunn1-2/+0
The setup() callback is not used by any in kernel code. Remove it. Any new code which requires access to the eeprom can use the NVMEM API. Signed-off-by: Andrew Lunn <[email protected]> Acked-by: Srinivas Kandagatla <[email protected]> Acked-by: Wolfram Sang <[email protected]> Signed-off-by: Greg Kroah-Hartman <[email protected]>
2016-02-18spi: docbook: fix parsing errorMartin Sperl1-3/+4
Fixes docbook parsing error because documentation is not directly followed by the structure, but typedef used in structure. Reordering should solve that issue. Signed-off-by: Martin Sperl <[email protected]> Signed-off-by: Mark Brown <[email protected]>
2016-02-09spi: introduce accelerated read support for spi flash devicesVignesh R1-0/+41
In addition to providing direct access to SPI bus, some spi controller hardwares (like ti-qspi) provide special port (like memory mapped port) that are optimized to improve SPI flash read performance. This means the controller can automatically send the SPI signals required to read data from the SPI flash device. For this, SPI controller needs to know flash specific information like read command to use, dummy bytes and address width. Introduce spi_flash_read() interface to support accelerated read over SPI flash devices. SPI master drivers can implement this callback to support interfaces such as memory mapped read etc. m25p80 flash driver and other flash drivers can call this make use of such interfaces. The interface should only be used with SPI flashes and cannot be used with other SPI devices. Signed-off-by: Vignesh R <[email protected]> Signed-off-by: Mark Brown <[email protected]>
2016-02-09spi: core: add spi_split_transfers_maxsizeMartin Sperl1-0/+15
Add spi_split_transfers_maxsize method that splits spi_transfers transparently into multiple transfers that are below the given max-size. This makes use of the spi_res framework via spi_replace_transfers to allocate/free the extra transfers as well as reverting back the changes applied while processing the spi_message. Signed-off-by: Martin Sperl <[email protected]> Signed-off-by: Mark Brown <[email protected]>
2016-02-09spi: core: add spi_replace_transfers methodMartin Sperl1-0/+45
Add the spi_replace_transfers method that can get used to replace some spi_transfers from a spi_message with other transfers. Signed-off-by: Martin Sperl <[email protected]> Signed-off-by: Mark Brown <[email protected]>
2016-02-09spi: core: added spi_resource managementMartin Sperl1-0/+36
SPI resource management framework used while processing a spi_message via the spi-core. The basic idea is taken from devres, but as the allocation may happen fairly frequently, some provisioning (in the form of an unused spi_device pointer argument to spi_res_alloc) has been made so that at a later stage we may implement reuse objects allocated earlier avoiding the repeated allocation by keeping a cache of objects that we can reuse. This framework can get used for: * rewriting spi_messages * to fullfill alignment requirements of the spi_master HW * to fullfill transfer length requirements (e.g: transfers need to be less than 64k) * consolidate spi_messages with multiple transfers into a single transfer when the total transfer length is below a threshold. * reimplement spi_unmap_buf without explicitly needing to check if it has been mapped Signed-off-by: Martin Sperl <[email protected]> Signed-off-by: Mark Brown <[email protected]>
2016-02-09spi: Let drivers translate ACPI DeviceSelection to suitable Linux chip selectMika Westerberg1-0/+5
In Windows it is up to the SPI host controller driver to handle the ACPI DeviceSelection as it likes. The SPI core does not take any part in it. This is different in Linux because we always expect to have chip select in range of 0 .. master->num_chipselect - 1. In order to support this in Linux we need a way to allow the driver to translate between ACPI DeviceSelection field and Linux chip select number so provide a new optional hook ->fw_translate_cs() that can be used by a driver to handle translation and call this hook if set during SPI slave ACPI enumeration. Signed-off-by: Mika Westerberg <[email protected]> Reviewed-by: Jarkko Nikula <[email protected]> Signed-off-by: Mark Brown <[email protected]>
2016-02-08spi: Document max_transfer_sizeRandy Dunlap1-0/+2
Fix kernel-doc warning for missing struct field notation. ..//include/linux/spi/spi.h:540: warning: No description found for parameter 'max_transfer_size' [Meaningful subject -- broonie] Signed-off-by: Randy Dunlap <[email protected]> Signed-off-by: Mark Brown <[email protected]>
2016-01-11Merge remote-tracking branches 'spi/topic/overlay', 'spi/topic/pxa2xx', ↵Mark Brown1-6/+1
'spi/topic/s3c64xx', 'spi/topic/sh-msiof' and 'spi/topic/spidev' into spi-next
2016-01-11Merge remote-tracking branches 'spi/topic/lm70llp', 'spi/topic/loopback', ↵Mark Brown1-1/+6
'spi/topic/mtk' and 'spi/topic/omap2-mcspi' into spi-next
2016-01-05spi: expose master transfer size limitation.Michal Suchanek1-0/+15
On some SPI controllers it is not feasible to transfer arbitrary amount of data at once. When the limit on transfer size is a few kilobytes at least it makes sense to use the SPI hardware rather than reverting to gpio driver. The protocol drivers need a way to check that they do not sent overly long messages, though. Signed-off-by: Michal Suchanek <[email protected]> Signed-off-by: Mark Brown <[email protected]>
2015-12-12spi: add spi_message_init_no_memset to avoid zeroing the spi_messageMartin Sperl1-1/+6
In the spi_loopback_test driver there is the need to initialize a spi_message that is filled with values from a static structure. Applying spi_message_init to such a prefilled structure results in all the settings getting reset to zero, which is not what we want. Copying each field of spi_message separately instead always includes the risk that some new fields have not been implemented in the copying code. So here we introduce a version of spi_message_init called spi_message_init_no_memset that does not fill the structure with zero first, but only initializes the relevant list_heads. Signed-off-by: Martin Sperl <[email protected]> Signed-off-by: Mark Brown <[email protected]>
2015-12-01spi: Uninline spi_unregister_device()Geert Uytterhoeven1-6/+1
Uninline spi_unregister_device() in preparation of adding more code to it. Add kerneldoc documentation while we're at it. Signed-off-by: Geert Uytterhoeven <[email protected]> Signed-off-by: Mark Brown <[email protected]>
2015-11-10Merge tag 'armsoc-cleanup' of ↵Linus Torvalds1-1/+0
git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc Pull ARM SoC cleanups from Olof Johansson: "Again we have a sizable (but not huge) cleanup branch with a net delta of about -3k lines. Main contents here is: - A bunch of development/cleanup of a few PXA boards - Removal of bockw platforms on shmobile, since the platform has now gone completely multiplatform. Whee! - move of the 32kHz timer on OMAP to a proper timesource - Misc cleanup of older OMAP material (incl removal of one board file) - Switch over to new common PWM lookup support for several platforms There's also a handful of other cleanups across the tree, but the above are the major pieces" * tag 'armsoc-cleanup' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (103 commits) ARM: OMAP3: hwmod data: Remove legacy mailbox data and addrs ARM: DRA7: hwmod data: Remove spinlock hwmod addrs ARM: OMAP4: hwmod data: Remove spinlock hwmod addrs ARM: DRA7/AM335x/AM437x: hwmod: Remove gpmc address space from hwmod data ARM: Remove __ref on hotplug cpu die path ARM: Remove open-coded version of IRQCHIP_DECLARE arm: omap2: board-generic: use omap4_local_timer_init for AM437x ARM: DRA7/AM335x/AM437x: hwmod: Remove elm address space from hwmod data ARM: OMAP: Remove duplicated operand in OR operation clocksource: ti-32k: make it depend on GENERIC_CLOCKSOURCE ARM: pxa: remove incorrect __init annotation on pxa27x_set_pwrmode ARM: pxa: raumfeld: make some variables static ARM: OMAP: Change all cpu_is_* occurences to soc_is_* for id.c ARM: OMAP2+: Rename cpu_is macros to soc_is arm: omap2: timer: limit hwmod usage to non-DT boots arm: omap2+: select 32k clocksource driver clocksource: add TI 32.768 Hz counter driver arm: omap2: timer: rename omap_sync32k_timer_init() arm: omap2: timer: always call clocksource_of_init() when DT arm: omap2: timer: move realtime_counter_init() around ...
2015-11-04Merge remote-tracking branches 'spi/topic/omap-100k', ↵Mark Brown1-1/+5
'spi/topic/omap-uwire', 'spi/topic/owner', 'spi/topic/pxa' and 'spi/topic/pxa2xx' into spi-next
2015-11-04Merge remote-tracking branches 'spi/topic/bcm53xx', 'spi/topic/bcm63xx', ↵Mark Brown1-1/+1
'spi/topic/bfin-sport', 'spi/topic/bfin5xx' and 'spi/topic/bitbang' into spi-next
2015-10-28spi: Add THIS_MODULE to spi_driver in SPI coreAndrew F. Davis1-1/+5
Add spi_register_driver helper macro that adds THIS_MODULE to spi_driver for the registering driver. We rename and modify the existing spi_register_driver to enable this. Signed-off-by: Andrew F. Davis <[email protected]> Signed-off-by: Mark Brown <[email protected]>
2015-10-23Merge tag 'pxa-for-4.4' of https://github.com/rjarzmik/linux into next/cleanupOlof Johansson1-1/+0
This is the pxa changes for v4.4 cycle. This cycle is bigger than usual : - magician was greatly enhanced (new IPs discovered, ...) - almost all legacy board files have been updated to the new PWM API (mostly for backlight control) - some minor fixes in raumfeld, z2 and mioa701 * tag 'pxa-for-4.4' of https://github.com/rjarzmik/linux: (44 commits) ARM: pxa: remove incorrect __init annotation on pxa27x_set_pwrmode ARM: pxa: raumfeld: make some variables static ARM: pxa: magician: Remove pdata for pasic3-leds ARM: pxa: magician: Add support for PXA27x UDC ARM: pxa: magician: Add support for MAX1587A Vcore regulator ARM: pxa: magician: Change comments to be more informative ARM: pxa: magician: Move platform_add_devices() to the end of magician_init() ARM: pxa: magician: Add missing regulator for PWM backlight ARM: pxa: magician: Add debug message for backlight brightness function ARM: pxa: magician: Remove definition of the STUART port ARM: pxa: magician: Fix wrongly enabled USB host ports ARM: pxa: magician: Fix support for Intel Strata NOR Flash ARM: pxa: magician: Fix redundant GPIO request for pxaficp_ir ARM: pxa: magician: Fix platform data for both PXA27x I2C controllers ARM: pxa: magician: Fix and add charging detection functions ARM: pxa: magician: Optimize Samsung LCD refresh to 50Hz ARM: pxa: magician: Rename charger cable detection EGPIOs ARM: pxa: magician: Optimize powerup delays for Samsung LCD ARM: pxa: magician: Rename abstract LCD GPIOs ARM: pxa: magician: Add new discovered EGPIO pins ... Signed-off-by: Olof Johansson <[email protected]>
2015-10-24spi: fix kernel-doc warnings about missing return desc in spi.hJavier Martinez Canillas1-14/+20
When building docs with make htmldocs, warnings about not having a description for the return value are reported, i.e: warning: No description found for return value of 'spi_write' Fix these by following the kernel-doc conventions explained in Documentation/kernel-doc-nano-HOWTO.txt. Signed-off-by: Javier Martinez Canillas <[email protected]> Signed-off-by: Mark Brown <[email protected]>
2015-10-24Merge branches 'topic/core' and 'topic/stats' of ↵Mark Brown1-0/+4
git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi into spi-doc
2015-09-20ARM: pxa: Remove unused clock_enable field from struct pxa2xx_spi_masterJarkko Nikula1-1/+0
Use for struct pxa2xx_spi_master clock_enable field was removed years ago from the pxa2xx-spi driver by the commit 2f1a74e5a2de ("[ARM] pxa: make pxa2xx_spi driver use ssp_request()/ssp_free()"). Therefore remove it from structure definition, documentation and from couple affected board files. Signed-off-by: Jarkko Nikula <[email protected]> Acked-by: Mark Brown <[email protected]> Signed-off-by: Robert Jarzmik <[email protected]>
2015-09-19spi: add transfer histogram statistics via sysfsMartin Sperl1-0/+4
report transfer sizes as a histogram via the following files: /sys/class/spi_master/spi*/statistics/transfer_bytes_histo_* /sys/class/spi_master/spi*/spi*.*/statistics/transfer_bytes_histo_* Signed-off-by: Martin Sperl <[email protected]> Signed-off-by: Mark Brown <[email protected]>
2015-09-17spi: bitbang: Replace spinlock by mutexNicolas Boichat1-1/+1
chipselect (in the case of spi-gpio: spi_gpio_chipselect, which calls gpiod_set_raw_value_cansleep) can sleep, so we should not hold a spinlock while calling it from spi_bitbang_setup. This issue was introduced by this commit, which converted spi-gpio to cansleep variants: d9dda5a191 "spi: spi-gpio: Use 'cansleep' variants to access GPIO" Replacing the lock variable by a mutex fixes the issue: This is safe as all instances where the lock is used are called from contexts that can sleep. Finally, update spi-ppc4xx and and spi-s3c24xx to use mutex functions, as they directly hold the lock for similar purpose. Signed-off-by: Nicolas Boichat <[email protected]> Signed-off-by: Mark Brown <[email protected]>
2015-09-16spi: fix kernel-doc warnings in spi.hGeliang Tang1-1/+1
Fix the following 'make htmldocs' warnings: .//include/linux/spi/spi.h:71: warning: No description found for parameter 'lock' .//include/linux/spi/spi.h:71: warning: Excess struct/union/enum/typedef member 'clock' description in 'spi_statistics' Signed-off-by: Geliang Tang <[email protected]> Signed-off-by: Mark Brown <[email protected]>
2015-07-07spi: expose spi_master and spi_device statistics via sysfsMartin Sperl1-0/+64
per spi-master statistics accessible as: /sys/class/spi_master/spi*/statistics/* per spi-device statistics accessible via: /sys/class/spi_master/spi*/spi*.*/statistics/* The following statistics are exposed as separate "files" inside these directories: * messages number of spi_messages * transfers number of spi_transfers * bytes number of bytes transferred * bytes_rx number of bytes transmitted * bytes_tx number of bytes received * errors number of errors encounterd * timedout number of messages that have timed out * spi_async number of spi_messages submitted using spi_async * spi_sync number of spi_messages submitted using spi_sync * spi_sync_immediate number of spi_messages submitted using spi_sync, that are handled immediately without a context switch to the spi_pump worker-thread Signed-off-by: Martin Sperl <[email protected]> Signed-off-by: Mark Brown <[email protected]>
2015-05-31cc2520: fix CC2591 handlingVarka Bhadram1-1/+0
This patch changes tha way of handling of cc2591-cc2520 combination by moving amplified variable from platform data to private data. This will be useful in other sections like tx power support. Signed-off-by: Varka Bhadram <[email protected]> Cc: Brad Campbell <[email protected]> Signed-off-by: Marcel Holtmann <[email protected]>
2015-04-15Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-nextLinus Torvalds2-0/+2
Pull networking updates from David Miller: 1) Add BQL support to via-rhine, from Tino Reichardt. 2) Integrate SWITCHDEV layer support into the DSA layer, so DSA drivers can support hw switch offloading. From Floria Fainelli. 3) Allow 'ip address' commands to initiate multicast group join/leave, from Madhu Challa. 4) Many ipv4 FIB lookup optimizations from Alexander Duyck. 5) Support EBPF in cls_bpf classifier and act_bpf action, from Daniel Borkmann. 6) Remove the ugly compat support in ARP for ugly layers like ax25, rose, etc. And use this to clean up the neigh layer, then use it to implement MPLS support. All from Eric Biederman. 7) Support L3 forwarding offloading in switches, from Scott Feldman. 8) Collapse the LOCAL and MAIN ipv4 FIB tables when possible, to speed up route lookups even further. From Alexander Duyck. 9) Many improvements and bug fixes to the rhashtable implementation, from Herbert Xu and Thomas Graf. In particular, in the case where an rhashtable user bulk adds a large number of items into an empty table, we expand the table much more sanely. 10) Don't make the tcp_metrics hash table per-namespace, from Eric Biederman. 11) Extend EBPF to access SKB fields, from Alexei Starovoitov. 12) Split out new connection request sockets so that they can be established in the main hash table. Much less false sharing since hash lookups go direct to the request sockets instead of having to go first to the listener then to the request socks hashed underneath. From Eric Dumazet. 13) Add async I/O support for crytpo AF_ALG sockets, from Tadeusz Struk. 14) Support stable privacy address generation for RFC7217 in IPV6. From Hannes Frederic Sowa. 15) Hash network namespace into IP frag IDs, also from Hannes Frederic Sowa. 16) Convert PTP get/set methods to use 64-bit time, from Richard Cochran. * git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next: (1816 commits) fm10k: Bump driver version to 0.15.2 fm10k: corrected VF multicast update fm10k: mbx_update_max_size does not drop all oversized messages fm10k: reset head instead of calling update_max_size fm10k: renamed mbx_tx_dropped to mbx_tx_oversized fm10k: update xcast mode before synchronizing multicast addresses fm10k: start service timer on probe fm10k: fix function header comment fm10k: comment next_vf_mbx flow fm10k: don't handle mailbox events in iov_event path and always process mailbox fm10k: use separate workqueue for fm10k driver fm10k: Set PF queues to unlimited bandwidth during virtualization fm10k: expose tx_timeout_count as an ethtool stat fm10k: only increment tx_timeout_count in Tx hang path fm10k: remove extraneous "Reset interface" message fm10k: separate PF only stats so that VF does not display them fm10k: use hw->mac.max_queues for stats fm10k: only show actual queues, not the maximum in hardware fm10k: allow creation of VLAN on default vid fm10k: fix unused warnings ...
2015-04-11Merge remote-tracking branches 'spi/topic/omap-100k', ↵Mark Brown1-4/+0
'spi/topic/omap-uwire', 'spi/topic/pl022', 'spi/topic/pm' and 'spi/topic/pxa2xx' into spi-next
2015-04-11Merge remote-tracking branches 'spi/topic/blackfin', 'spi/topic/cadence', ↵Mark Brown1-1/+1
'spi/topic/dw' and 'spi/topic/err' into spi-next
2015-04-11Merge remote-tracking branches 'spi/topic/atmel', 'spi/topic/bcm2385', ↵Mark Brown1-0/+4
'spi/topic/bcm2835', 'spi/topic/bcm53xx' and 'spi/topic/bitbang' into spi-next
2015-04-07spi: Make master->handle_err() callback optional to avoid crashesGeert Uytterhoeven1-1/+1
If a driver doesn't implement the master->handle_err() callback and an SPI transfer fails, the kernel will crash with a NULL pointer dereference: Unable to handle kernel NULL pointer dereference at virtual address 00000000 pgd = c0003000 [00000000] *pgd=80000040004003, *pmd=00000000 Internal error: Oops: 80000206 [#1] SMP ARM Modules linked in: CPU: 1 PID: 1 Comm: swapper/0 Not tainted 4.0.0-rc7-koelsch-05861-g1fc9fdd4add4f783 #1046 Hardware name: Generic R8A7791 (Flattened Device Tree) task: eec359c0 ti: eec54000 task.ti: eec54000 PC is at 0x0 LR is at spi_transfer_one_message+0x1cc/0x1f0 Make the master->handle_err() callback optional to avoid the crash. Also fix a spelling mistake in the callback documentation while we're at it. Fixes: b716c4ffc6a2b0bf ("spi: introduce master->handle_err() callback") Signed-off-by: Geert Uytterhoeven <[email protected]> Signed-off-by: Mark Brown <[email protected]>
2015-03-18cc2520: Add support for CC2591 amplifier.Brad Campbell1-0/+1
The TI CC2521 is an RF power amplifier that is designed to interface with the CC2520. Conveniently, it directly interfaces with the CC2520 and does not require any pins to be connected to a microcontroller/processor. Adding a CC2591 increases the CC2520's range, which is useful for border router and other wall-powered applications. Using the CC2591 with the CC2520 requires configuring the CC2520 GPIOs that are connected to the CC2591 to correctly set the CC2591 into TX and RX modes. Further, TI recommends that the CC2520_TXPOWER and CC2520_AGCCTRL1 registers are set differently to maximize the CC2591's performance. These settings are covered in TI Application Note AN065. This patch adds an optional `amplified` field to the cc2520 entry in the device tree. If present, the CC2520 will be configured to operate with a CC2591. The expected pin mapping is: CC2520 GPIO0 --> CC2591 EN CC2520 GPIO5 --> CC2591 PAEN Signed-off-by: Brad Campbell <[email protected]> Acked-by: Varka Bhadram <[email protected]> Signed-off-by: Marcel Holtmann <[email protected]>
2015-03-09Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/netDavid S. Miller1-1/+1
Conflicts: drivers/net/ethernet/cadence/macb.c Overlapping changes in macb driver, mostly fixes and cleanups in 'net' overlapping with the integration of at91_ether into macb in 'net-next'. Signed-off-by: David S. Miller <[email protected]>
2015-03-08spi: Remove support for legacy PMLars-Peter Clausen1-4/+0
All SPI drivers have been converted from legacy suspend/resume callbacks to dev_pm_ops. So we can finally remove support for legacy PM from the SPI core. Since there aren't any special bus specific things to do during suspend/resume and since the PM core will automatically fallback directly to using the device's PM ops if no bus PM ops are specified there is no need to have any special SPI bus PM ops. Signed-off-by: Lars-Peter Clausen <[email protected]> Signed-off-by: Mark Brown <[email protected]>
2015-03-06spi: introduce master->handle_err() callbackAndy Shevchenko1-0/+4
This callback would be useful to handle an error that occurs in the generic implementation of transfer_one_message(). The good candidate for this is to drain FIFO and / or to terminate DMA transfers when timeout happened. Signed-off-by: Andy Shevchenko <[email protected]> Signed-off-by: Mark Brown <[email protected]>
2015-03-03spi: fix a typo in comment.Marcin Bis1-1/+1
alway -> always Signed-off-by: Marcin Bis <[email protected]> Signed-off-by: Mark Brown <[email protected]>
2015-02-27at86rf230: add support for external xtal trimAlexander Aring1-0/+1
This patch adds support for setting the xtal trim register. Some at86rf2xx transceiver boards needs fine tuning the xtal capacitor. Signed-off-by: Alexander Aring <[email protected]> Signed-off-by: Marcel Holtmann <[email protected]>
2015-02-08Merge remote-tracking branches 'spi/topic/orion', 'spi/topic/pxa2xx', ↵Mark Brown1-1/+0
'spi/topic/qup', 'spi/topic/rockchip' and 'spi/topic/samsung' into spi-next
2015-02-08Merge remote-tracking branches 'spi/topic/img-spfi', 'spi/topic/imx', ↵Mark Brown1-0/+2
'spi/topic/inline', 'spi/topic/meson' and 'spi/topic/mxs' into spi-next
2015-02-08Merge remote-tracking branches 'spi/topic/falcon', 'spi/topic/fsf', ↵Mark Brown10-42/+0
'spi/topic/fsl', 'spi/topic/fsl-dspi' and 'spi/topic/gpio' into spi-next
2015-02-04spi: spi-pxa2xx: only include mach/dma.h for legacy DMARob Herring1-1/+0
Move the include of mach/dma.h to the legacy PXA DMA code where it is used. This enables building spi-pxa2xx on ARM64. Signed-off-by: Rob Herring <[email protected]> Signed-off-by: Mark Brown <[email protected]>
2014-12-24spi: sh-msiof: Configure MSIOF sync signal timing in device treeYoshihiro Shimoda1-0/+2
The MSIOF controller has DTDL and SYNCDL in SITMDR1 register. So, this patch adds new properties like the following commit: d0fb47a5237d8b9576113568bacfd27892308b62 (spi: fsl-espi: Configure FSL eSPI CSBEF and CSAFT) Signed-off-by: Yoshihiro Shimoda <[email protected]> Signed-off-by: Mark Brown <[email protected]>
2014-12-22spi: Remove FSF mailing addressesJarkko Nikula10-42/+0
Signed-off-by: Jarkko Nikula <[email protected]> Signed-off-by: Mark Brown <[email protected]>
2014-12-11spi: Pump transfers inside calling context for spi_sync()Mark Brown1-0/+2
If we are using the standard SPI message pump (which all drivers should be transitioning over to) then special case the message enqueue and instead of starting the worker thread to push messages to the hardware do so in the context of the caller if the controller is idle. This avoids a context switch in the common case where the controller has a single user in a single thread, for short PIO transfers there may be no need to context switch away from the calling context to complete the transfer. The code is a bit more complex than is desirable in part due to the need to handle drivers not using the standard queue and in part due to handling the various combinations of bus locking and asynchronous submission in interrupt context. It is still suboptimal since it will still wake the message pump for each transfer in order to schedule idling of the hardware and if multiple contexts are using the controller simultaneously a caller may end up pumping a message for some random other thread rather than for itself, and if the thread ends up deferring due to another context idling the hardware then it will just busy wait. It can, however, have the benefit of aggregating power up and down of the hardware when a caller performs a series of transfers back to back without any need for the use of spi_async(). Signed-off-by: Mark Brown <[email protected]>
2014-11-24spi: core: Add spi_transfer_is_last() helperBeniamino Galvani1-0/+6
This adds the function spi_transfer_is_last() which can be used by drivers to know whether a given transfer is the last one in the current message. Signed-off-by: Beniamino Galvani <[email protected]> Signed-off-by: Mark Brown <[email protected]>
2014-10-18Merge branch 'for-linus' of git://git.infradead.org/users/vkoul/slave-dmaLinus Torvalds1-4/+5
Pull slave-dmaengine updates from Vinod Koul: "For dmaengine contributions we have: - designware cleanup by Andy - my series moving device_control users to dmanegine_xxx APIs for later removal of device_control API - minor fixes spread over drivers mainly mv_xor, pl330, mmp, imx-sdma etc" * 'for-linus' of git://git.infradead.org/users/vkoul/slave-dma: (60 commits) serial: atmel: add missing dmaengine header dmaengine: remove FSLDMA_EXTERNAL_START dmaengine: freescale: remove FSLDMA_EXTERNAL_START control method carma-fpga: move to fsl_dma_external_start() carma-fpga: use dmaengine_xxx() API dmaengine: freescale: add and export fsl_dma_external_start() dmaengine: add dmaengine_prep_dma_sg() helper video: mx3fb: use dmaengine_terminate_all() API serial: sh-sci: use dmaengine_terminate_all() API net: ks8842: use dmaengine_terminate_all() API mtd: sh_flctl: use dmaengine_terminate_all() API mtd: fsmc_nand: use dmaengine_terminate_all() API V4L2: mx3_camer: use dmaengine_pause() API dmaengine: coh901318: use dmaengine_terminate_all() API pata_arasan_cf: use dmaengine_terminate_all() API dmaengine: edma: check for echan->edesc => NULL in edma_dma_pause() dmaengine: dw: export probe()/remove() and Co to users dmaengine: dw: enable and disable controller when needed dmaengine: dw: always export dw_dma_{en,dis}able dmaengine: dw: introduce dw_dma_on() helper ...
Powered by cgit, Gruvboxed by Blaster4385.