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| * | spi: fsl-espi: factor out filling the local bufferHeiner Kallweit2016-09-121-22/+24
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Better structure the code by factoring out filling the local buffer. In addition don't initialize the complete local buffer at the beginning of fsl_espi_do_one_msg. Instead move initialization of those parts of the local buffer to be used for transfers w/o tx_buf to fsl_espi_copy_to_buf. Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com> Signed-off-by: Mark Brown <broonie@kernel.org>
| * | spi: fsl-espi: pre-allocate message bufferHeiner Kallweit2016-09-122-23/+19
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Currently the driver allocates a 64kb buffer for each single message. On systems with little and fragmented memory this can result in memory allocation errors. Solve this by pre-allocating a buffer. This patch was developed in OpenWRT long ago, however it never made it upstream. I slightly modified the original patch to re-initialize the buffer at the beginning of each transfer. Signed-off-by: Gabor Juhos <juhosg@openwrt.org> Signed-off-by: Felix Fietkau <nbd@nbd.name> Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com> Signed-off-by: Mark Brown <broonie@kernel.org>
| * | spi: fsl-espi: remove unneeded check in fsl_espi_do_transHeiner Kallweit2016-09-061-2/+1
| | | | | | | | | | | | | | | | | | | | | SPI core takes care that both values are always populated. Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com> Signed-off-by: Mark Brown <broonie@kernel.org>
| * | spi: fsl-espi: simplify fsl_espi_setup_transferHeiner Kallweit2016-09-061-3/+1
| | | | | | | | | | | | | | | | | | | | | Simplify fsl_espi_setup_transfer a little. Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com> Signed-off-by: Mark Brown <broonie@kernel.org>
| * | spi: fsl-espi: remove unused elements n_rx and n_tx in struct fsl_espi_transferHeiner Kallweit2016-09-061-11/+1
| | | | | | | | | | | | | | | | | | | | | Both elements are not used, so remove them. Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com> Signed-off-by: Mark Brown <broonie@kernel.org>
| * | spi: fsl-espi: remove unneeded variable in fsl_espi_do_transHeiner Kallweit2016-09-011-15/+8
| | | | | | | | | | | | | | | | | | | | | | | | | | | Creating a message, adding one transfer, and then iterating over all transfers in the message doesn't make sense. We can simply use the original transfer directly. Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com> Signed-off-by: Mark Brown <broonie@kernel.org>
| * | spi: fsl-espi: add missing static declaration to fsl_espi_cpu_irqHeiner Kallweit2016-09-011-1/+1
| | | | | | | | | | | | | | | | | | | | | Add missing static declaration to fsl_espi_cpu_irq. Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com> Signed-off-by: Mark Brown <broonie@kernel.org>
| * | spi: fsl-espi: change return type of fsl_espi_cpu_bufs to voidHeiner Kallweit2016-09-011-6/+2
| | | | | | | | | | | | | | | | | | | | | fsl_espi_cpu_bufs always returns 0, so change the return type to void. Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com> Signed-off-by: Mark Brown <broonie@kernel.org>
| * | spi: fsl-espi: change return type of fsl_espi_setup_transfer to voidHeiner Kallweit2016-09-011-15/+4
| | | | | | | | | | | | | | | | | | | | | | | | fsl_espi_setup_transfer always returns 0, so change the return type to void. Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com> Signed-off-by: Mark Brown <broonie@kernel.org>
| * | spi: fsl-espi: dont include irq.hHeiner Kallweit2016-09-011-1/+0
| | | | | | | | | | | | | | | | | | | | | | | | irq.h isn't needed and it even shouldn't be included, see comment at the beginning of this header file. Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com> Signed-off-by: Mark Brown <broonie@kernel.org>
| * | spi: fsl-espi: eliminate spi nor flash read loopHeiner Kallweit2016-08-181-70/+21
| |/ | | | | | | | | | | | | | | | | | | | | | | | | The fsl-espi driver contains a read loop that implicitely assumes that the device to read from is a m25p80 SPI NOR flash (bytes 2 - 4 of the first write transfer are interpreted as 3 byte flash address). Now that we have such a read loop in the spi-nor driver and are able to correctly indicate the message size limit of the controller, the read loop can be removed from the fsl-espi driver. Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com> Signed-off-by: Mark Brown <broonie@kernel.org>
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*---. \ Merge remote-tracking branches 'spi/topic/bcm', 'spi/topic/dw' and ↵Mark Brown2016-09-309-15/+1756
|\ \ \ \ | | | | | | | | | | | | | | | 'spi/topic/fsl-dspi' into spi-next
| | | * | spi: spi-fsl-dspi: Drop extra spi_master_put in device remove functionWei Yongjun2016-08-221-1/+0
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The call sequence spi_alloc_master/spi_register_master/spi_unregister_master is complete; it reduces the device reference count to zero, which and results in device memory being freed. The subsequent call to spi_master_put is unnecessary and results in an access to free memory. Drop it. Fixes: 9298bc727385 ("spi: spi-fsl-dspi: Remove spi-bitbang") Signed-off-by: Wei Yongjun <weiyj.lk@gmail.com> Signed-off-by: Mark Brown <broonie@kernel.org>
| | | * | spi: spi-fsl-dspi: Check clk_prepare_enable() errorFabio Estevam2016-08-221-2/+7
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | clk_prepare_enable() may fail, so we should better check its return value and propagate it in the case of failure. Signed-off-by: Fabio Estevam <fabio.estevam@nxp.com> Signed-off-by: Mark Brown <broonie@kernel.org>
| | | * | spi: spi-fsl-dspi: fix a possible NULL dereferenceLABBE Corentin2016-08-161-3/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | of_match_device could return NULL, and so cause a NULL pointer dereference later. For fixing this problem, we use of_device_get_match_data(), this will simplify the code a little by using a standard function for getting the match data. Reported-by: coverity (CID 1324129) Signed-off-by: LABBE Corentin <clabbe.montjoie@gmail.com> Signed-off-by: Mark Brown <broonie@kernel.org>
| | | * | spi: spi-fsl-dspi: constify devtype_dataLABBE Corentin2016-08-161-2/+2
| | | |/ | | | | | | | | | | | | | | | | | | | | | | | | | | | | of_id->data is const, so instead of casting the pointer to drop its const status, this patch constify the devtype_data pointer. Signed-off-by: LABBE Corentin <clabbe.montjoie@gmail.com> Signed-off-by: Mark Brown <broonie@kernel.org>
| | * | spi: dw: round up result of calculation for clock dividerMatthias Seidel2016-09-121-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | Avoid ending up with a higher frequency than requested Signed-off-by: Matthias Seidel <kernel@mseidel.net> Signed-off-by: Mark Brown <broonie@kernel.org>
| | * | spi: dw: fix multiple slaves with different baudratesMatthias Seidel2016-09-062-8/+8
| | |/ | | | | | | | | | | | | | | | | | | | | | Add current master clock to dws struct and compare it against the requestedtransfer speed. Update clock divider only if necessary. Signed-off-by: Matthias Seidel <kernel@mseidel.net> Signed-off-by: Mark Brown <broonie@kernel.org>
| * | spi: iproc-qspi: Add Broadcom iProc SoCs supportKamal Dasu2016-09-244-5/+291
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This spi driver uses the common spi-bcm-qspi driver and implements iProc SoCs specific interrupt controller. The common driver now calls the SoC handlers when present. Adding support for both muxed l1 and unmuxed interrupt sources. Signed-off-by: Kamal Dasu <kdasu.kdev@gmail.com> Signed-off-by: Yendapally Reddy Dhananjaya Reddy <yendapally.reddy@broadcom.com> Signed-off-by: Mark Brown <broonie@kernel.org>
| * | spi: bcm-qspi: Fix error return code in bcm_qspi_probe()Wei Yongjun2016-09-161-0/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | Fix to return a negative error code from the error handling case instead of 0, as done elsewhere in this function. Fixes: fa236a7ef240 ("spi: bcm-qspi: Add Broadcom MSPI driver") Signed-off-by: Wei Yongjun <weiyongjun1@huawei.com> Signed-off-by: Mark Brown <broonie@kernel.org>
| * | spi: bcm-qspi: Fix return value check in bcm_qspi_probe()Wei Yongjun2016-09-161-2/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | In case of error, the function kcalloc() returns NULL pointer not ERR_PTR(). The IS_ERR() test in the return value check should be replaced with NULL test. Fixes: fa236a7ef240 ("spi: bcm-qspi: Add Broadcom MSPI driver") Signed-off-by: Wei Yongjun <weiyongjun1@huawei.com> Signed-off-by: Mark Brown <broonie@kernel.org>
| * | spi: bcm-qspi: fix suspend/resume #ifdefArnd Bergmann2016-09-161-8/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The two power management functions are define inside of an #ifdef but referenced unconditionally, which is obviously broken when CONFIG_PM_SLEEP is not set: drivers/spi/spi-bcm-qspi.c:1300:13: error: 'bcm_qspi_suspend' undeclared here (not in a function) drivers/spi/spi-bcm-qspi.c:1301:13: error: 'bcm_qspi_resume' undeclared here (not in a function) This replaces the #ifdef with a __maybe_unused annotation that lets the compiler figure out whether to drop the functions itself, and uses SIMPLE_DEV_PM_OPS() to refer to the functions. This will also fill the freeze/thaw/poweroff/restore callback pointers in addition to suspend/resume, but as far as I can tell, this is what we want. Signed-off-by: Arnd Bergmann <arnd@arndb.de> Fixes: fa236a7ef240 ("spi: bcm-qspi: Add Broadcom MSPI driver") Signed-off-by: Mark Brown <broonie@kernel.org>
| * | spi: bcm-qspi: don't include linux/mtd/cfi.hArnd Bergmann2016-09-161-1/+0
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The header isn't actually needed here, but including it leads to a build warning when CONFIG_MTD is disabled: include/linux/mtd/cfi.h:76:2: #warning No CONFIG_MTD_CFI_Ix selected. No NOR chip support can work. [-Werror=cpp] Fixes: fa236a7ef240 (spi: bcm-qspi: Add Broadcom MSPI driver) Signed-off-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Mark Brown <broonie@kernel.org>
| * | spi: bcm-qspi: Add BSPI spi-nor flash controller driverKamal Dasu2016-09-142-3/+620
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This change implements BSPI driver for Broadcom BRCMSTB, NS2, NSP SoCs works in combination with the MSPI controller driver and implements flash read acceleration and implements the spi_flash_read() method. Both MSPI and BSPI controllers are needed to access spi-nor flash. Signed-off-by: Kamal Dasu <kdasu.kdev@gmail.com> Signed-off-by: Yendapally Reddy Dhananjaya Reddy <yendapally.reddy@broadcom.com> Signed-off-by: Mark Brown <broonie@kernel.org>
| * | spi: brcmstb-qspi: Broadcom settop platform driverKamal Dasu2016-09-142-1/+54
| | | | | | | | | | | | | | | | | | | | | | | | | | | Adding the settop SoC platfrom driver, this driver is compatible with the settop MSPI+BSPI and MSPI only blocks implemented on the SoCs. Driver calls the spi-bcm-qspi probe(), remove() and pm_ops. Signed-off-by: Kamal Dasu <kdasu.kdev@gmail.com> Signed-off-by: Mark Brown <broonie@kernel.org>
| * | spi: bcm-qspi: Add Broadcom MSPI driverKamal Dasu2016-09-144-0/+786
| |/ | | | | | | | | | | | | | | | | | | | | Master SPI driver for Broadcom settop, iProc SoCs. The driver is used for devices that use SPI protocol on BRCMSTB, NSP, NS2 SoCs. SoC platform driver call exported porbe(), remove() and suspend/resume pm_ops implemented in this common driver. Signed-off-by: Kamal Dasu <kdasu.kdev@gmail.com> Signed-off-by: Yendapally Reddy Dhananjaya Reddy Signed-off-by: Mark Brown <broonie@kernel.org>
* | Merge remote-tracking branch 'spi/topic/dma' into spi-nextMark Brown2016-09-301-3/+14
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| * | spi: Add support to handle kmap'd buffers in spi_map_buf()Vignesh R2016-08-171-3/+14
| |/ | | | | | | | | | | | | | | | | | | JFFS2 FS might sometime provide kmap'd buffers as destination buffers to read data from flash. Update spi_map_buf() function to generate sg_list for such buffers, so that SPI controllers drivers can use DMA to read data into such buffers. Signed-off-by: Vignesh R <vigneshr@ti.com> Signed-off-by: Mark Brown <broonie@kernel.org>
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*-------. \ Merge remote-tracking branches 'spi/fix/lock', 'spi/fix/maintainers', ↵Mark Brown2016-09-066-6/+12
|\ \ \ \ \ \ | |_|_|_|_|/ |/| | | | | | | | | | | 'spi/fix/put', 'spi/fix/pxa2xx', 'spi/fix/sh-msiof' and 'spi/fix/timeout' into spi-linus
| | | | | * spi: Prevent unexpected SPI time out due to arithmetic overflowSien Wu2016-09-031-2/+6
| |_|_|_|/ |/| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | When reading SPI flash as MTD device, the transfer length is directly passed to the spi driver. If the requested data size exceeds 512KB, it will cause the time out calculation to overflow since transfer length is 32-bit unsigned integer. This issue is resolved by using 64-bit unsigned integer to perform the arithmetic. Signed-off-by: Sien Wu <sien.wu@ni.com> Acked-by: Brad Keryan <brad.keryan@ni.com> Acked-by: Gratian Crisan <gratian.crisan@ni.com> Acked-by: Brad Mouring <brad.mouring@ni.com> Natinst-ReviewBoard-ID 150232 Signed-off-by: Mark Brown <broonie@kernel.org>
| | | | * spi: sh-msiof: Avoid invalid clock generator parametersGeert Uytterhoeven2016-08-051-0/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The conversion from a look-up table to a calculation for clock generator parameters forgot to take into account that BRDV x 1/1 is valid only if BRPS is x 1/1 or x 1/2, leading to undefined behavior (e.g. arbitrary clock rates). This limitation is documented for the MSIOF module in all supported SH/R-Mobile and R-Car Gen2/Gen3 ARM SoCs. Tested on r8a7791/koelsch and r8a7795/salvator-x. Fixes: 65d5665bb260b034 ("spi: sh-msiof: Update calculation of frequency dividing") Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> Signed-off-by: Mark Brown <broonie@kernel.org>
| | | * | spi: pxa2xx-pci: fix ACPI-based enumeration of SPI devicesAndy Shevchenko2016-08-241-0/+1
| |_|/ / |/| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Slave devices are not enumerated by ACPI data because the ACPI handle for the core driver is NULL if it was enumerated by PCI. Propagate firmware node handle of the PCI device to the platform device. Suggested-by: Mika Westerberg <mika.westerberg@linux.intel.com> Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Signed-off-by: Mark Brown <broonie@kernel.org>
| | * | spi: img-spfi: Remove spi_master_put in img_spfi_remove()Wei Yongjun2016-07-271-2/+0
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The call to spi_master_put() in img_spfi_remove() is redundant since the master is registered using devm_spi_register_master() and no reference hold by using spi_master_get() in img_spfi_remove(). This is detected by Coccinelle semantic patch. Signed-off-by: Wei Yongjun <weiyj.lk@gmail.com> Signed-off-by: Mark Brown <broonie@kernel.org>
| | * | spi: mediatek: remove spi_master_put in mtk_spi_remove()Wei Yongjun2016-07-271-1/+0
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The call to spi_master_put() in mtk_spi_remove() is redundant since the master is registered using devm_spi_register_master() and no reference hold by using spi_master_get() in mtk_spi_remove(). This is detected by Coccinelle semantic patch. Signed-off-by: Wei Yongjun <weiyj.lk@gmail.com> Signed-off-by: Mark Brown <broonie@kernel.org>
| | * | spi: qup: Remove spi_master_put in spi_qup_remove()Wei Yongjun2016-07-271-1/+0
| | |/ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The call to spi_master_put() in spi_qup_remove() is redundant since the master is registered using devm_spi_register_master() and no reference hold by using spi_master_get() in spi_qup_remove(). This is detected by Coccinelle semantic patch. Signed-off-by: Wei Yongjun <weiyj.lk@gmail.com> Signed-off-by: Mark Brown <broonie@kernel.org>
| * / spi: Drop io_mutex in error pathsMark Brown2016-08-091-0/+2
|/ / | | | | | | | | | | | | A couple of error paths were missing drops of io_mutex. Reported-by: Julia Lawall <julia.lawall@lip6.fr> Signed-off-by: Mark Brown <broonie@kernel.org>
* | Merge tag 'armsoc-dt' of ↵Linus Torvalds2016-08-021-31/+5
|\ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc Pull ARM DT updates from Olof Johansson: "Device tree contents continue to be the largest branches we submit. This time around, some of the contents worth pointing out is: New SoC platforms: - Freescale i.MX 7Solo - Broadcom BCM23550 - Cirrus Logic EP7209 and EP7211 (clps711x platforms)_ - Hisilicon HI3519 - Renesas R8A7792 Some of the other delta that is sticking out, line-count wise: - Exynos moves of IP blocks under an SoC bus, which causes a large delta due to indentation changes - a new Tegra K1 board: Apalis - a bunch of small updates to many Allwinner platforms; new hardware support, some cleanup, etc" * tag 'armsoc-dt' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (426 commits) ARM: dts: sun8i: Add dts file for inet86dz board ARM: dts: sun8i: Add dts file for Polaroid MID2407PXE03 tablet ARM: dts: sun8i: Use sun8i-reference-design-tablet for ga10h dts ARM: dts: sun8i: Use sun8i-reference-design-tablet for polaroid mid2809pxe04 ARM: dts: sun8i: reference-design-tablet: Add drivevbus-supply ARM: dts: Copy sun8i-q8-common.dtsi sun8i-reference-design-tablet.dtsi ARM: dts: sun5i: Use sun5i-reference-design-tablet.dtsi for utoo p66 dts ARM: dts: sun5i: Use sun5i-reference-design-tablet.dtsi for dit4350 dts ARM: dts: sun5i: reference-design-tablet: Remove mention of q8 ARM: dts: sun5i: reference-design-tablet: Set lradc vref to avcc ARM: dts: sun5i: Rename sun5i-q8-common.dtsi sun5i-reference-design-tablet.dtsi ARM: dts: sun5i: Move q8 display bits to sun5i-a13-q8-tablet.dts ARM: dts: sunxi: Rename sunxi-q8-common.dtsi sunxi-reference-design-tablet.dtsi ARM: dts: at91: Don't build unnecessary dtbs ARM: dts: at91: sama5d3x: separate motherboard gmac and emac definitions ARM: dts: at91: at91sam9g25ek: fix isi endpoint node ARM: dts: at91: move isi definition to at91sam9g25ek ARM: dts: at91: fix i2c-gpio node name ARM: dts: at91: vinco: fix regulator name ARM: dts: at91: ariag25 : fix onewire node ...
| * | spi: st-ssc4: Remove 'no clocking' hackLee Jones2016-07-121-31/+5
| | | | | | | | | | | | | | | | | | | | | | | | Due to the newly upstreamed 'critical clocks' API we can now safely handle clocking in the SPI and I2C drivers without fear of catastrophically crippling the running platform. Signed-off-by: Lee Jones <lee.jones@linaro.org>
* | | Merge tag 'spi-v4.8' of ↵Linus Torvalds2016-07-2732-883/+1303
|\ \ \ | | |/ | |/| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi Pull spi updates from Mark Brown: "Quite a lot of cleanup and maintainence work going on this release in various drivers, and also a fix for a nasty locking issue in the core: - A fix for locking issues when external drivers explicitly locked the bus with spi_bus_lock() - we were using the same lock to both control access to the physical bus in multi-threaded I/O operations and exclude multiple callers. Confusion between these two caused us to have scenarios where we were dropping locks. These are fixed by splitting into two separate locks like should have been done originally, making everything much clearer and correct. - Support for DMA in spi_flash_read(). - Support for instantiating spidev on ACPI systems, including some test devices used in Windows validation. - Use of the core DMA mapping functionality in the McSPI driver. - Start of support for ThunderX SPI controllers, involving a very big set of changes to the Cavium driver. - Support for Braswell, Exynos 5433, Kaby Lake, Merrifield, RK3036, RK3228, RK3368 controllers" * tag 'spi-v4.8' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi: (64 commits) spi: Split bus and I/O locking spi: octeon: Split driver into Octeon specific and common parts spi: octeon: Move include file from arch/mips to drivers/spi spi: octeon: Put register offsets into a struct spi: octeon: Store system clock freqency in struct octeon_spi spi: octeon: Convert driver to use readq()/writeq() functions spi: pic32-sqi: fixup wait_for_completion_timeout return handling spi: pic32: fixup wait_for_completion_timeout return handling spi: rockchip: limit transfers to (64K - 1) bytes spi: xilinx: Return IRQ_NONE if no interrupts were detected spi: xilinx: Handle errors from platform_get_irq() spi: s3c64xx: restore removed comments spi: s3c64xx: add Exynos5433 compatible for ioclk handling spi: s3c64xx: use error code from clk_prepare_enable() spi: s3c64xx: rename goto labels to meaningful names spi: s3c64xx: document the clocks and the clock-name property spi: s3c64xx: add exynos5433 spi compatible spi: s3c64xx: fix reference leak to master in s3c64xx_spi_remove() spi: spi-sh: Remove deprecated create_singlethread_workqueue spi: spi-topcliff-pch: Remove deprecated create_singlethread_workqueue ...
| * | Merge remote-tracking branch 'spi/fix/locking' into spi-nextMark Brown2016-07-251-20/+18
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| | * | spi: Split bus and I/O lockingMark Brown2016-07-251-20/+18
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The current SPI code attempts to use bus_lock_mutex for two purposes. One is to implement spi_bus_lock() which grants exclusive access to the bus. The other is to serialize access to the physical hardware. This duplicate purpose causes confusion which leads to cases where access is not locked when a caller holds the bus lock mutex. Fix this by splitting out the I/O functionality into a new io_mutex. This means taking both mutexes in the DMA path, replacing the existing mutex with the new I/O one in the message pump (the mutex now always being taken in the message pump) and taking the bus lock mutex in spi_sync(), allowing __spi_sync() to have no mutex handling. While we're at it hoist the mutex further up the message pump before we power up the device so that all power up/down of the block is covered by it and there are no races with in-line pumping of messages. Reported-by: Rich Felker <dalias@libc.org> Tested-by: Rich Felker <dalias@libc.org> Signed-off-by: Mark Brown <broonie@kernel.org>
| * | | Merge remote-tracking branch 'spi/topic/xilinx' into spi-nextMark Brown2016-07-241-2/+6
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| | * | | spi: xilinx: Return IRQ_NONE if no interrupts were detectedLars-Peter Clausen2016-07-151-1/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Return IRQ_NONE from the interrupt handler if the handler is running, but no interrupt was detected. This allows the system to recover in case of an interrupt storm due to an invalid interrupt configuration or faulty hardware. Signed-off-by: Lars-Peter Clausen <lars@metafoo.de> Acked-by: Ricardo Ribalda Delgado <ricardo.ribalda@gmail.com> Signed-off-by: Mark Brown <broonie@kernel.org>
| | * | | spi: xilinx: Handle errors from platform_get_irq()Lars-Peter Clausen2016-07-151-1/+4
| | | |/ | | |/| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The Xilinx SPI driver can operate without an IRQ, but not every error returned by platform_get_irq() means that no IRQ was specified. It will also return an error if the IRQ specification is invalid or the IRQ provider is not yet available (EPROBE_DEFER). So instead of ignoring all errors only ignore ENXIO, which means no IRQ was specified, and propagate all other errors to device driver core. Signed-off-by: Lars-Peter Clausen <lars@metafoo.de> Acked-by: Ricardo Ribalda Delgado <ricardo.ribalda@gmail.com> Signed-off-by: Mark Brown <broonie@kernel.org>
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| *-------. \ \ Merge remote-tracking branches 'spi/topic/spidev', 'spi/topic/sunxi', ↵Mark Brown2016-07-246-33/+62
| |\ \ \ \ \ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | 'spi/topic/ti-qspi', 'spi/topic/topcliff-pch' and 'spi/topic/txx9' into spi-next
| | | | | | * | | spi: spi-txx9: Remove deprecated create_singlethread_workqueueBhaktipriya Shridhar2016-07-031-9/+2
| | | | | | |/ / | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The workqueue "workqueue" has a single work item(&c->work) and hence doesn't require ordering. Also, it is not being used on a memory reclaim path. Hence, the singlethreaded workqueue has been replaced with the use of system_wq. System workqueues have been able to handle high level of concurrency for a long time now and hence it's not required to have a singlethreaded workqueue just to gain concurrency. Unlike a dedicated per-cpu workqueue created with create_singlethread_workqueue(), system_wq allows multiple work items to overlap executions even on the same CPU; however, a per-cpu workqueue doesn't have any CPU locality or global ordering guarantee unless the target CPU is explicitly specified and thus the increase of local concurrency shouldn't make any difference. Work item has been flushed in txx9spi_remove() to ensure that nothing is pending while disconnecting the driver. Signed-off-by: Bhaktipriya Shridhar <bhaktipriya96@gmail.com> Acked-by: Tejun Heo <tj@kernel.org> Signed-off-by: Mark Brown <broonie@kernel.org>
| | | | | * / / spi: spi-topcliff-pch: Remove deprecated create_singlethread_workqueueBhaktipriya Shridhar2016-07-111-23/+3
| | | | | |/ / | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The workqueue "wk" serves as a queue for carrying out execution of requests. It has a single work item(&drv_data->work) and hence doesn't require ordering. Also, it is not being used on a memory reclaim path. Hence, the singlethreaded workqueue has been replaced with the use of system_wq. System workqueues have been able to handle high level of concurrency for a long time now and hence it's not required to have a singlethreaded workqueue just to gain concurrency. Unlike a dedicated per-cpu workqueue created with create_singlethread_workqueue(), system_wq allows multiple work items to overlap executions even on the same CPU; however, a per-cpu workqueue doesn't have any CPU locality or global ordering guarantee unless the target CPU is explicitly specified and thus the increase of local concurrency shouldn't make any difference. Work item has been flushed in pch_spi_free_resources() to ensure that there are no pending tasks while disconnecting the driver. Also dropped the label 'err_return' since it's not being used anymore. Signed-off-by: Bhaktipriya Shridhar <bhaktipriya96@gmail.com> Signed-off-by: Mark Brown <broonie@kernel.org>
| | | | * / / spi: ti-qspi: spelling mistake: "trasnfers" -> "transfers"Colin Ian King2016-06-261-1/+1
| | | | |/ / | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | trivial fix to spelling mistake in dev_dbg message Signed-off-by: Colin Ian King <colin.king@canonical.com> Signed-off-by: Mark Brown <broonie@kernel.org>
| | | * | | spi: sunxi: set maximum and minimum speed of SPI masterMichal Suchanek2016-06-272-0/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The speed limits are unset in the sun4i and sun6i SPI drivers. The maximum speed of SPI master is used when maximum speed of SPI slave is not specified. Also the __spi_validate function should check that transfer speeds do not exceed the master limits. The user manual for A10 and A31 specifies maximum speed of the SPI clock as 100MHz and minimum as 3kHz. Setting the SPI clock to out-of-spec values can lock up the SoC. Signed-off-by: Michal Suchanek <hramrach@gmail.com> -- v2: new patch v3: fix constant style Signed-off-by: Mark Brown <broonie@kernel.org>
| | | * | | spi: sunxi: expose maximum transfer size limitMichal Suchanek2016-06-142-0/+11
| | | |/ / | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The sun4i spi hardware can trasfer at most 63 bytes of data without DMA support so report the limitation. Same for sun6i. Signed-off-by: Michal Suchanek <hramrach@gmail.com> Acked-by: Maxime Ripard <maxime.ripard@free-electrons.com> Signed-off-by: Mark Brown <broonie@kernel.org>
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-13 18:52:20 +0100