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path: root/drivers/spi
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2020-09-29spi: dw-dma: Remove DMA Tx-desc passing aroundSerge Semin
It's pointless to pass the Rx and Tx transfers DMA Tx-descriptors, since they are used in the Tx/Rx submit method only. Instead just return the submission status from these methods. This alteration will make the code less complex. Signed-off-by: Serge Semin <Sergey.Semin@baikalelectronics.ru> Link: https://lore.kernel.org/r/20200920112322.24585-8-Sergey.Semin@baikalelectronics.ru Signed-off-by: Mark Brown <broonie@kernel.org>
2020-09-29spi: dw-dma: Check DMA Tx-desc submission statusSerge Semin
We suggest to add the dmaengine_submit() return value test for errors. It has been unnecessary while the driver was expected to be utilized in pair with DW DMAC. But since now the driver can be used with any DMA engine, it might be useful to track the errors on DMA submissions so not miss them and get into an unpredictable driver behaviour. Signed-off-by: Serge Semin <Sergey.Semin@baikalelectronics.ru> Link: https://lore.kernel.org/r/20200920112322.24585-7-Sergey.Semin@baikalelectronics.ru Signed-off-by: Mark Brown <broonie@kernel.org>
2020-09-29spi: dw-dma: Move DMA transfers submission to the channels prep methodsSerge Semin
Indeed we can freely move the dmaengine_submit() method invocation and the Tx and Rx busy flag setting into the DMA Tx/Rx prepare methods. Since the Tx/Rx preparation method is now mainly used for the DMA transfers submission, here we suggest to rename it to have the _submit_{r,t}x suffix instead. By having this alteration applied first we implement another code preparation before adding the one-by-one DMA SG entries transmission, second we now have the dma_async_tx_descriptor descriptor used locally only in the new DMA transfers submission methods (this will be cleaned up a bit later), third we make the generic transfer method more readable, where now the functionality of submission, execution and wait procedures is transparently split up instead of having a preparation, intermixed submission/execution and wait procedures. Signed-off-by: Serge Semin <Sergey.Semin@baikalelectronics.ru> Link: https://lore.kernel.org/r/20200920112322.24585-6-Sergey.Semin@baikalelectronics.ru Signed-off-by: Mark Brown <broonie@kernel.org>
2020-09-29spi: dw-dma: Check rx_buf availability in the xfer methodSerge Semin
Checking rx_buf for being NULL and returning NULL from the Rx-channel preparation method doesn't let us to distinguish that situation from errors happening during the Rx SG-list preparation. So it's better to make sure that the rx_buf not-NULL and full-duplex communication is requested prior calling the Rx preparation method. Signed-off-by: Serge Semin <Sergey.Semin@baikalelectronics.ru> Link: https://lore.kernel.org/r/20200920112322.24585-5-Sergey.Semin@baikalelectronics.ru Signed-off-by: Mark Brown <broonie@kernel.org>
2020-09-29spi: dw-dma: Configure the DMA channels in dma_setupSerge Semin
Mainly this is a preparation patch before adding one-by-one DMA SG entries transmission. But logically the Tx and Rx DMA channels setup should be performed in the dma_setup() callback anyway. So we'll move the DMA slave channels src/dst burst lengths, address and address width configuration from the Tx/Rx channels preparation methods to the dedicated functions and then make sure it's called at the DMA setup stage. Note we now make sure the return value of the dmaengine_slave_config() method doesn't indicate an error. It has been unnecessary in case if Dw DMAC is utilized as a DMA engine, since its device_config() callback always returns zero (though it might change in future). But since DW APB SSI driver now supports any DMA back-end we must make sure the DMA device configuration has been successful before proceeding with further setups. Signed-off-by: Serge Semin <Sergey.Semin@baikalelectronics.ru> Link: https://lore.kernel.org/r/20200920112322.24585-4-Sergey.Semin@baikalelectronics.ru Signed-off-by: Mark Brown <broonie@kernel.org>
2020-09-29spi: dw-dma: Fail DMA-based transfer if no Tx-buffer specifiedSerge Semin
Since commit 46164fde6b78 ("spi: dw: Fix Rx-only DMA transfers") if DMA interface is enabled, then Tx-buffer must be available in each SPI transfer. It's required since in order to activate the incoming data reception either DMA or CPU must be pushing data out to the SPI bus. But the DW APB SSI DMA driver code is still left in state as if Tx-buffer might be optional, which is no longer true. Let's fix it so an error would be returned if no Tx-buffer detected and DMA Tx would be always enabled. Signed-off-by: Serge Semin <Sergey.Semin@baikalelectronics.ru> Link: https://lore.kernel.org/r/20200920112322.24585-3-Sergey.Semin@baikalelectronics.ru Signed-off-by: Mark Brown <broonie@kernel.org>
2020-09-29spi: dw-dma: Set DMA Level registers on initSerge Semin
Indeed the registers content doesn't get cleared when the SPI controller is disabled and enabled. Max burst lengths aren't changed since the Rx and Tx DMA channels are requested on init stage and are kept acquired until the device is removed. Obviously SPI controller FIFO depth can't be changed. Due to all of that we can safely move the DMA Transmit and Receive data level registers initialization to the SPI controller DMA init stage (when the SPI controller is being probed) instead of doing it for each SPI transfer when dma_setup is called. This shall speed the DMA-based SPI transfer initialization up a bit, particularly if the APB bus is relatively slow. Signed-off-by: Serge Semin <Sergey.Semin@baikalelectronics.ru> Link: https://lore.kernel.org/r/20200920112322.24585-2-Sergey.Semin@baikalelectronics.ru Signed-off-by: Mark Brown <broonie@kernel.org>
2020-09-28spi: hisi-sfc-v3xx: fix spelling mistake "occured" -> "occurred"Colin Ian King
There is a spelling mistake in a dev_err message. Fix it. Signed-off-by: Colin Ian King <colin.king@canonical.com> Link: https://lore.kernel.org/r/20200928123042.125359-1-colin.king@canonical.com Signed-off-by: Mark Brown <broonie@kernel.org>
2020-09-28spi: fsl-dspi: fix NULL pointer dereferenceMichael Walle
Since commit 530b5affc675 ("spi: fsl-dspi: fix use-after-free in remove path") this driver causes a kernel oops: [ 1.891065] Unable to handle kernel NULL pointer dereference at virtual address 0000000000000080 [..] [ 2.056973] Call trace: [ 2.059425] dspi_setup+0xc8/0x2e0 [ 2.062837] spi_setup+0xcc/0x248 [ 2.066160] spi_add_device+0xb4/0x198 [ 2.069918] of_register_spi_device+0x250/0x370 [ 2.074462] spi_register_controller+0x4f4/0x770 [ 2.079094] dspi_probe+0x5bc/0x7b0 [ 2.082594] platform_drv_probe+0x5c/0xb0 [ 2.086615] really_probe+0xec/0x3c0 [ 2.090200] driver_probe_device+0x60/0xc0 [ 2.094308] device_driver_attach+0x7c/0x88 [ 2.098503] __driver_attach+0x60/0xe8 [ 2.102263] bus_for_each_dev+0x7c/0xd0 [ 2.106109] driver_attach+0x2c/0x38 [ 2.109692] bus_add_driver+0x194/0x1f8 [ 2.113538] driver_register+0x6c/0x128 [ 2.117385] __platform_driver_register+0x50/0x60 [ 2.122105] fsl_dspi_driver_init+0x24/0x30 [ 2.126302] do_one_initcall+0x54/0x2d0 [ 2.130149] kernel_init_freeable+0x1ec/0x258 [ 2.134520] kernel_init+0x1c/0x120 [ 2.138018] ret_from_fork+0x10/0x34 [ 2.141606] Code: 97e0b11d aa0003f3 b4000680 f94006e0 (f9404000) [ 2.147723] ---[ end trace 26cf63e6cbba33a8 ]--- This is because since this commit, the allocation of the drivers private data is done explicitly and in this case spi_alloc_master() won't set the correct pointer. Also move the platform_set_drvdata() to have both next to each other. Fixes: 530b5affc675 ("spi: fsl-dspi: fix use-after-free in remove path") Signed-off-by: Michael Walle <michael@walle.cc> Tested-by: Sascha Hauer <s.hauer@pengutronix.de> Reviewed-by: Krzysztof Kozlowski <krzk@kernel.org> Link: https://lore.kernel.org/r/20200928085500.28254-1-michael@walle.cc Signed-off-by: Mark Brown <broonie@kernel.org>
2020-09-25Merge tag 'spi-fix-v5.9-rc6' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi Pull spi fixes from Mark Brown: "A small collection of driver specific fixes, the fsl-espi and bcm-qspi changes in particular have been causing breakage for users" * tag 'spi-fix-v5.9-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi: spi: bcm-qspi: Fix probe regression on iProc platforms spi: fsl-dspi: fix use-after-free in remove path spi: fsl-espi: Only process interrupts for expected events spi: bcm2835: Make polling_limit_us static spi: spi-fsl-dspi: use XSPI mode instead of DMA for DPAA2 SoCs
2020-09-25Merge series "Add IRQ mode support for hisi-sfc-v3xx driver and some ↵Mark Brown
cleanups" from Yicong Yang <yangyicong@hisilicon.com>: This series mainly add the IRQ mode support for hisi-sfc-v3xx driver, and some cleanups for the preparation of the IRQ mode. After this patch, the device can work in IRQ mode, or if firmware doesn't declare irq support it will fall back to Poll mode. Patch 1-2 refactor the .exec_op() path to make it simpler and clearer. Patch 3 factor the definition of the interrupt bits. Patch 4 add the IRQ support of the driver. Yicong Yang (4): spi: hisi-sfc-v3xx: factor out IO modes configuration spi: hisi-sfc-v3xx: factor out bus config and transfer functions spi: hisi-sfc-v3xx: factor out the bit definition of interrupt register spi: hisi-sfc-v3xx: add support for IRQ mode drivers/spi/spi-hisi-sfc-v3xx.c | 261 +++++++++++++++++++++++++++++----------- 1 file changed, 190 insertions(+), 71 deletions(-) -- 2.8.1 ______________________________________________________ Linux MTD discussion mailing list http://lists.infradead.org/mailman/listinfo/linux-mtd/
2020-09-25spi: spi-mtk-nor: fix timeout calculation overflowChuanhong Guo
CLK_TO_US macro is used to calculate potential transfer time for various timeout handling. However it overflows on transfer bigger than 512 bytes because it first did (len * 8 * 1000000). This controller typically operates at 45MHz. This patch did 2 things: 1. calculate clock / 1000000 first 2. add a 4M transfer size cap so that the final timeout in DMA reading doesn't overflow Fixes: 881d1ee9fe81f ("spi: add support for mediatek spi-nor controller") Cc: <stable@vger.kernel.org> Signed-off-by: Chuanhong Guo <gch981213@gmail.com> Link: https://lore.kernel.org/r/20200922114905.2942859-1-gch981213@gmail.com Signed-off-by: Mark Brown <broonie@kernel.org>
2020-09-25spi: hisi-sfc-v3xx: add support for IRQ modeYicong Yang
The controller can work with interrupts, so add support for it. Then we can work under IRQ mode or Poll mode now, if firmware doesn't declare the IRQ support, it will fall back to Poll mode. Acked-by: John Garry <john.garry@huawei.com> Signed-off-by: Yicong Yang <yangyicong@hisilicon.com> Link: https://lore.kernel.org/r/1600950270-52536-5-git-send-email-yangyicong@hisilicon.com Signed-off-by: Mark Brown <broonie@kernel.org>
2020-09-25spi: hisi-sfc-v3xx: factor out the bit definition of interrupt registerYicong Yang
The definition of the register field in the interrupt corresponding registers are the same. So factor them out to public place. Acked-by: John Garry <john.garry@huawei.com> Signed-off-by: Yicong Yang <yangyicong@hisilicon.com> Link: https://lore.kernel.org/r/1600950270-52536-4-git-send-email-yangyicong@hisilicon.com Signed-off-by: Mark Brown <broonie@kernel.org>
2020-09-25spi: hisi-sfc-v3xx: factor out bus config and transfer functionsYicong Yang
In hisi_sfc_v3xx_generic_exec_op(), we will write the data to the buffer, configure and start the transfer, read the data to the buffer and check whether occurs an error. Factor out the config and transfer start codes as individual functions, to make the process a bit clearer. Acked-by: John Garry <john.garry@huawei.com> Signed-off-by: Yicong Yang <yangyicong@hisilicon.com> Link: https://lore.kernel.org/r/1600950270-52536-3-git-send-email-yangyicong@hisilicon.com Signed-off-by: Mark Brown <broonie@kernel.org>
2020-09-25spi: hisi-sfc-v3xx: factor out IO modes configurationYicong Yang
Factor IO modes configuration out of hisi_sfc_v3xx_generic_exec_op() using an IO modes lookup table. This will make the process a bit clearer and reduce the cyclomatic complexity. Simplify the IO mode definition macros a little bit as well. Also add the .supports_op() method for the controller mem ops, in order to avoid OOB access. Acked-by: John Garry <john.garry@huawei.com> Signed-off-by: Yicong Yang <yangyicong@hisilicon.com> Link: https://lore.kernel.org/r/1600950270-52536-2-git-send-email-yangyicong@hisilicon.com Signed-off-by: Mark Brown <broonie@kernel.org>
2020-09-24spi: spi-zynqmp-gqspi: Fix incorrect indentationAmit Kumar Mahapatra
Fixed incorrect indentation in ZynqMP qspi controller driver. Signed-off-by: Amit Kumar Mahapatra <amit.kumar-mahapatra@xilinx.com> Signed-off-by: Michal Simek <michal.simek@xilinx.com> Link: https://lore.kernel.org/r/2b246b6f0925c8a2a767a4240e8738ffeefd62be.1600931476.git.michal.simek@xilinx.com Signed-off-by: Mark Brown <broonie@kernel.org>
2020-09-24spi: spi-zynqmp-gqspi: Update driver to use spi-mem frameworkAmit Kumar Mahapatra
Updated Zynqmp qspi controller driver to use spi-mem framework. Signed-off-by: Amit Kumar Mahapatra <amit.kumar-mahapatra@xilinx.com> Signed-off-by: Michal Simek <michal.simek@xilinx.com> Link: https://lore.kernel.org/r/490a7642a975f4d3dd9618304e9e45f7e2414661.1600931476.git.michal.simek@xilinx.com Signed-off-by: Mark Brown <broonie@kernel.org>
2020-09-24spi: spi-zynqmp-gqspi: Fix kernel-doc warningsAmit Kumar Mahapatra
Fix kernel-doc warnings in ZynqMP qspi driver file. Signed-off-by: Amit Kumar Mahapatra <amit.kumar-mahapatra@xilinx.com> Signed-off-by: Michal Simek <michal.simek@xilinx.com> Link: https://lore.kernel.org/r/ba5920c57eee06fafa6f9d1df9859e69819ac301.1600931476.git.michal.simek@xilinx.com Signed-off-by: Mark Brown <broonie@kernel.org>
2020-09-24spi: bcm-qspi: Fix probe regression on iProc platformsRay Jui
iProc chips have QSPI controller that does not have the MSPI_REV offset. Reading from that offset will cause a bus error. Fix it by having MSPI_REV query disabled in the generic compatible string. Fixes: 3a01f04d74ef ("spi: bcm-qspi: Handle lack of MSPI_REV offset") Link: https://lore.kernel.org/linux-arm-kernel/20200909211857.4144718-1-f.fainelli@gmail.com/T/#u Signed-off-by: Ray Jui <ray.jui@broadcom.com> Acked-by: Florian Fainelli <f.fainelli@gmail.com> Link: https://lore.kernel.org/r/20200910152539.45584-3-ray.jui@broadcom.com Signed-off-by: Mark Brown <broonie@kernel.org>
2020-09-23spi: spi-imx: spi_imx_transfer(): add support for effective_speed_hzMarc Kleine-Budde
This patch implementes the reporting of the effectivly used speed_hz for the transfer by setting tfr->effective_speed_hz. See the following patch, which adds this feature to the SPI core for more information: 5d7e2b5ed585 spi: core: allow reporting the effectivly used speed_hz for a transfer Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de> Link: https://lore.kernel.org/r/20200917202420.1914104-1-mkl@pengutronix.de Signed-off-by: Mark Brown <broonie@kernel.org>
2020-09-23spi: fsl-dspi: fix use-after-free in remove pathSascha Hauer
spi_unregister_controller() not only unregisters the controller, but also frees the controller. This will free the driver data with it, so we must not access it later dspi_remove(). Solve this by allocating the driver data separately from the SPI controller. Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de> Link: https://lore.kernel.org/r/20200923131026.20707-1-s.hauer@pengutronix.de Signed-off-by: Mark Brown <broonie@kernel.org>
2020-09-22spi: omap2-mcspi: Improve performance waiting for CHSTATAswath Govindraju
This reverts commit 13d515c796 (spi: omap2-mcspi: Switch to readl_poll_timeout()). The amount of time spent polling for the MCSPI_CHSTAT bits to be set on AM335x-icev2 platform is less than 1us (about 0.6us) in most cases, with or without using DMA. So, in most cases the function need not sleep. Also, setting the sleep_usecs to zero would not be optimal here because ktime_add_us() used in readl_poll_timeout() is slower compared to the direct addition used after the revert. So, it is sub-optimal to use readl_poll_timeout in this case. When DMA is not enabled, this revert results in an increase of about 27% in throughput and decrease of about 20% in CPU usage. However, the CPU usage and throughput are almost the same when used with DMA. Therefore, fix this by reverting the commit which switched to using readl_poll_timeout(). Fixes: 13d515c796ad ("spi: omap2-mcspi: Switch to readl_poll_timeout()") Signed-off-by: Aswath Govindraju <a-govindraju@ti.com> Link: https://lore.kernel.org/r/20200910122624.8769-1-a-govindraju@ti.com Signed-off-by: Mark Brown <broonie@kernel.org>
2020-09-22spi: npcm-fiu: simplify the return expression of npcm_fiu_probe()Qinglang Miao
Simplify the return expression. Signed-off-by: Qinglang Miao <miaoqinglang@huawei.com> Link: https://lore.kernel.org/r/20200921131106.93228-1-miaoqinglang@huawei.com Signed-off-by: Mark Brown <broonie@kernel.org>
2020-09-21spi: fsl-espi: Only process interrupts for expected eventsChris Packham
The SPIE register contains counts for the TX FIFO so any time the irq handler was invoked we would attempt to process the RX/TX fifos. Use the SPIM value to mask the events so that we only process interrupts that were expected. This was a latent issue exposed by commit 3282a3da25bd ("powerpc/64: Implement soft interrupt replay in C"). Signed-off-by: Chris Packham <chris.packham@alliedtelesis.co.nz> Link: https://lore.kernel.org/r/20200904002812.7300-1-chris.packham@alliedtelesis.co.nz Signed-off-by: Mark Brown <broonie@kernel.org>
2020-09-21spi/topcliff-pch: drop double zeroingJulia Lawall
sg_init_table zeroes its first argument, so the allocation of that argument doesn't have to. the semantic patch that makes this change is as follows: (http://coccinelle.lip6.fr/) // <smpl> @@ expression x,n,flags; @@ x = - kcalloc + kmalloc_array (n,sizeof(*x),flags) ... sg_init_table(x,n) // </smpl> Signed-off-by: Julia Lawall <Julia.Lawall@inria.fr> Link: https://lore.kernel.org/r/1600601186-7420-12-git-send-email-Julia.Lawall@inria.fr Signed-off-by: Mark Brown <broonie@kernel.org>
2020-09-17Merge series "spi: Fixes for FSI-attached controller" from Eddie James ↵Mark Brown
<eajames@linux.ibm.com>: This series implements a number of fixes for the FSI-attached SPI controller driver. Changes since v1: - Switch to a new compatible string for the restricted version of the SPI controller, rather than a new boolean parameter. Brad Bishop (3): spi: fsi: Handle 9 to 15 byte transfers lengths spi: fsi: Fix clock running too fast spi: fsi: Fix use of the bneq+ sequencer instruction Eddie James (3): dt-bindings: fsi: fsi2spi: Add compatible string for restricted version spi: fsi: Implement restricted size for certain controllers spi: fsi: Check mux status before transfers .../devicetree/bindings/fsi/ibm,fsi2spi.yaml | 1 + drivers/spi/spi-fsi.c | 139 ++++++++++++++---- 2 files changed, 109 insertions(+), 31 deletions(-) -- 2.26.2
2020-09-17spi: dw-pci: free previously allocated IRQs if desc->setup() failsJay Fang
Free previously allocated IRQs when return an error code of desc->setup() which is not always successful. And simplify the code by adding a goto label. Fixes: 8f5c285f3ef5 ("SPI: designware: pci: Switch over to MSI interrupts") CC: Felipe Balbi <felipe.balbi@linux.intel.com> Signed-off-by: Jay Fang <f.fangjian@huawei.com> Link: https://lore.kernel.org/r/1600132969-53037-1-git-send-email-f.fangjian@huawei.com Signed-off-by: Mark Brown <broonie@kernel.org>
2020-09-17spi: spi-nxp-fspi: Add ACPI supportkuldip dwivedi
Currently NXP fspi driver has support of DT only. Adding ACPI support to the driver so that it can be used by UEFI firmware booting in ACPI mode. This driver will be probed if any firmware will expose HID "NXP0009" in DSDT table. Signed-off-by: kuldip dwivedi <kuldip.dwivedi@puresoftware.com> Reviewed-by: Ashish Kumar <Ashish.Kumar@nxp.com> Link: https://lore.kernel.org/r/20200911130331.6313-1-kuldip.dwivedi@puresoftware.com Signed-off-by: Mark Brown <broonie@kernel.org>
2020-09-17spi: lantiq: remove redundant irqsave and irqrestore in hardIRQBarry Song
Running in hardIRQ, disabling irq is redundant. Signed-off-by: Barry Song <song.bao.hua@hisilicon.com> Link: https://lore.kernel.org/r/20200916101042.21860-1-song.bao.hua@hisilicon.com Signed-off-by: Mark Brown <broonie@kernel.org>
2020-09-17spi: xilinx: Fix info message during probeRicardo Ribalda
The info message was showing the mapped address of the device. To avoid security problems, all virtual addresses are converted to __ptrval__, so the message was useless/ugly: [ 2.304949] xilinx_spi b0010000.spi-flash: at 0xB0010000 mapped to 0x(____ptrval____), irq=37 Use %pR instead: [ 15.021354] xilinx_spi b0010000.spi-flash: at [mem 0xb0010000-0xb001ffff], irq=37 Signed-off-by: Ricardo Ribalda <ribalda@kernel.org> Acked-by: Michal Simek <michal.simek@xilinx.com> Link: https://lore.kernel.org/r/20200915112936.320647-1-ribalda@kernel.org Signed-off-by: Mark Brown <broonie@kernel.org>
2020-09-17spi: fsi: Check mux status before transfersEddie James
The SPI controllers are not accessible if the mux isn't set. Therefore, check the mux status before starting a transfer and fail out if it isn't set. Signed-off-by: Eddie James <eajames@linux.ibm.com> Signed-off-by: Joel Stanley <joel@jms.id.au> Link: https://lore.kernel.org/r/20200909222857.28653-7-eajames@linux.ibm.com Signed-off-by: Mark Brown <broonie@kernel.org>
2020-09-17spi: fsi: Implement restricted size for certain controllersEddie James
Some of the FSI-attached SPI controllers cannot use the loop command in programming the sequencer due to security requirements. Check the devicetree compatibility that indicates this condition and restrict the size for these controllers. Also, add more transfers directly in the sequence up to the length of the sequence register. Fixes: bbb6b2f9865b ("spi: Add FSI-attached SPI controller driver") Signed-off-by: Eddie James <eajames@linux.ibm.com> Reviewed-by: Joel Stanley <joel@jms.id.au> Signed-off-by: Joel Stanley <joel@jms.id.au> Link: https://lore.kernel.org/r/20200909222857.28653-6-eajames@linux.ibm.com Signed-off-by: Mark Brown <broonie@kernel.org>
2020-09-17spi: fsi: Fix use of the bneq+ sequencer instructionBrad Bishop
All of the switches in N2_count_control in the counter configuration are required to make the branch if not equal and increment command work. Set them when using bneq+. A side effect of this mode requires a dummy write to TDR when both transmitting and receiving otherwise the controller won't start shifting receive data. It is likely not possible to avoid TDR underrun errors in this mode and they are harmless, so do not check for them. Fixes: bbb6b2f9865b ("spi: Add FSI-attached SPI controller driver") Signed-off-by: Brad Bishop <bradleyb@fuzziesquirrel.com> Signed-off-by: Eddie James <eajames@linux.ibm.com> Reviewed-by: Joel Stanley <joel@jms.id.au> Signed-off-by: Joel Stanley <joel@jms.id.au> Link: https://lore.kernel.org/r/20200909222857.28653-4-eajames@linux.ibm.com Signed-off-by: Mark Brown <broonie@kernel.org>
2020-09-17spi: fsi: Fix clock running too fastBrad Bishop
Use a clock divider tuned to a 200MHz FSI bus frequency (the maximum). Use of the previous divider at 200MHz results in corrupt data from endpoint devices. Ideally the clock divider would be calculated from the FSI clock, but that would require some significant work on the FSI driver. With FSI frequencies slower than 200MHz, the SPI clock will simply run slower, but safely. Signed-off-by: Brad Bishop <bradleyb@fuzziesquirrel.com> Signed-off-by: Eddie James <eajames@linux.ibm.com> Signed-off-by: Joel Stanley <joel@jms.id.au> Link: https://lore.kernel.org/r/20200909222857.28653-3-eajames@linux.ibm.com Signed-off-by: Mark Brown <broonie@kernel.org>
2020-09-17spi: fsi: Handle 9 to 15 byte transfers lengthsBrad Bishop
The trailing <len> - 8 bytes of transfer data in this size range is no longer ignored. Fixes: bbb6b2f9865b ("spi: Add FSI-attached SPI controller driver") Signed-off-by: Brad Bishop <bradleyb@fuzziesquirrel.com> Signed-off-by: Eddie James <eajames@linux.ibm.com> Reviewed-by: Joel Stanley <joel@jms.id.au> Signed-off-by: Joel Stanley <joel@jms.id.au> Link: https://lore.kernel.org/r/20200909222857.28653-2-eajames@linux.ibm.com Signed-off-by: Mark Brown <broonie@kernel.org>
2020-09-15spi: bcm2835: Make polling_limit_us staticJason Yan
This eliminates the following sparse warning: drivers/spi/spi-bcm2835.c:78:14: warning: symbol 'polling_limit_us' was not declared. Should it be static? Reported-by: Hulk Robot <hulkci@huawei.com> Signed-off-by: Jason Yan <yanaijie@huawei.com> Link: https://lore.kernel.org/r/20200912072211.602735-1-yanaijie@huawei.com Signed-off-by: Mark Brown <broonie@kernel.org>
2020-09-14spi: sprd: Simplify with dev_err_probe()Krzysztof Kozlowski
Common pattern of handling deferred probe can be simplified with dev_err_probe(). Less code and the error value gets printed. Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org> Acked-by: Chunyan Zhang <zhang.lyra@gmail.com> Link: https://lore.kernel.org/r/20200910160706.5883-1-krzk@kernel.org Signed-off-by: Mark Brown <broonie@kernel.org>
2020-09-14spi: spi-geni-qcom: Don't wait to start 1st transfer if transmittingDouglas Anderson
If we're sending bytes over SPI, we know the FIFO is empty at the start of the transfer. There's no reason to wait for the interrupt telling us to start--we can just start right away. Then if we transmit everything in one swell foop we don't even need to bother listening for TX interrupts. In a test of "flashrom -p ec -r /tmp/foo.bin" interrupts were reduced from ~30560 to ~29730, about a 3% savings. This patch looks bigger than it is because I moved a few functions rather than adding a forward declaration. The only actual change to geni_spi_handle_tx() was to make it return a bool indicating if there is more to tx. Signed-off-by: Douglas Anderson <dianders@chromium.org> Reviewed-by: Akash Asthana <akashast@codeaurora.org> Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org> Link: https://lore.kernel.org/r/20200912111716.1.Ied5e843fad0d6b733a1fb8bcfb364dd2fa889eb3@changeid Signed-off-by: Mark Brown <broonie@kernel.org>
2020-09-14spi: bcm2835: Make polling_limit_us staticJason Yan
This eliminates the following sparse warning: drivers/spi/spi-bcm2835.c:78:14: warning: symbol 'polling_limit_us' was not declared. Should it be static? Reported-by: Hulk Robot <hulkci@huawei.com> Signed-off-by: Jason Yan <yanaijie@huawei.com> Link: https://lore.kernel.org/r/20200912072211.602735-1-yanaijie@huawei.com Signed-off-by: Mark Brown <broonie@kernel.org>
2020-09-14spi: spi-fsl-dspi: use XSPI mode instead of DMA for DPAA2 SoCsVladimir Oltean
The arch/arm64/boot/dts/freescale/fsl-ls208xa.dtsi device tree lacks DMA channels for DSPI, so naturally, the driver fails to probe: [ 2.945302] fsl-dspi 2100000.spi: rx dma channel not available [ 2.951134] fsl-dspi 2100000.spi: can't get dma channels In retrospect, this should have been obvious, because LS2080A, LS2085A LS2088A and LX2160A don't appear to have an eDMA module at all. Looking again at their datasheets, the CTARE register (which is specific to XSPI functionality) seems to be documented, so switch them to XSPI mode instead. Fixes: 0feaf8f5afe0 ("spi: spi-fsl-dspi: Convert the instantiations that support it to DMA") Reported-by: Qiang Zhao <qiang.zhao@nxp.com> Tested-by: Qiang Zhao <qiang.zhao@nxp.com> Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com> Link: https://lore.kernel.org/r/20200910121532.1138596-1-olteanv@gmail.com Signed-off-by: Mark Brown <broonie@kernel.org>
2020-09-14spi: spi-geni-qcom: Don't program CS_TOGGLE again and againDouglas Anderson
We always toggle the chip select manually in spi-geni-qcom so that we can properly implement the Linux API. There's no reason to program this to the hardware on every transfer. Program it once at init and be done with it. This saves some part of a microsecond of overhead on each transfer. While not really noticeable on any real world benchmarks, we might as well save the time. Signed-off-by: Douglas Anderson <dianders@chromium.org> Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org> Link: https://lore.kernel.org/r/20200912140730.2.I33e571179986850b4ec17042e813d0b08fb1b9c1@changeid Signed-off-by: Mark Brown <broonie@kernel.org>
2020-09-14spi: spi-geni-qcom: Use the FIFO even moreDouglas Anderson
In commit 902481a78ee4 ("spi: spi-geni-qcom: Actually use our FIFO") I explained that the maximum size we could program the FIFO was "mas->tx_fifo_depth - 3" but that I chose "mas->tx_fifo_depth()" because I was worried about decreased bandwidth. Since that time: * All the interconnect patches have landed, making things run at the proper speed. * I've done more measurements. This lets me confirm that there's really no downside of using the FIFO more. Specifically I did "flashrom -p ec -r /tmp/foo.bin" on a Chromebook and averaged over several runs. Before: It took 6.66 seconds and 59669 interrupts fired. After: It took 6.66 seconds and 47992 interrupts fired. Signed-off-by: Douglas Anderson <dianders@chromium.org> Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org> Link: https://lore.kernel.org/r/20200912140730.1.Ie67fa32009b94702d56232c064f1d89065ee8836@changeid Signed-off-by: Mark Brown <broonie@kernel.org>
2020-09-14spi: spi-qcom-qspi: replace spin_lock_irqsave by spin_lock in hard IRQBarry Song
It is redundant to do irqsave and irqrestore in hardIRQ context. Cc: Andy Gross <agross@kernel.org> Cc: Bjorn Andersson <bjorn.andersson@linaro.org> Signed-off-by: Barry Song <song.bao.hua@hisilicon.com> Link: https://lore.kernel.org/r/20200910100246.32696-1-song.bao.hua@hisilicon.com Signed-off-by: Mark Brown <broonie@kernel.org>
2020-09-14spi: bcm-qspi: Clean up 7425, 7429, and 7435 settingsRay Jui
The Broadcom QSPI driver now falls back to no MSPI_DEV support as the default setting in the generic compatible string, explicit settings for STB chips 7425, 7429, and 7435 can be removed. Signed-off-by: Ray Jui <ray.jui@broadcom.com> Acked-by: Florian Fainelli <f.fainelli@gmail.com> Link: https://lore.kernel.org/r/20200910152539.45584-4-ray.jui@broadcom.com Signed-off-by: Mark Brown <broonie@kernel.org>
2020-09-14spi: bcm-qspi: Fix probe regression on iProc platformsRay Jui
iProc chips have QSPI controller that does not have the MSPI_REV offset. Reading from that offset will cause a bus error. Fix it by having MSPI_REV query disabled in the generic compatible string. Fixes: 3a01f04d74ef ("spi: bcm-qspi: Handle lack of MSPI_REV offset") Link: https://lore.kernel.org/linux-arm-kernel/20200909211857.4144718-1-f.fainelli@gmail.com/T/#u Signed-off-by: Ray Jui <ray.jui@broadcom.com> Acked-by: Florian Fainelli <f.fainelli@gmail.com> Link: https://lore.kernel.org/r/20200910152539.45584-3-ray.jui@broadcom.com Signed-off-by: Mark Brown <broonie@kernel.org>
2020-09-14spi: bcm-qspi: Add compatible string for BRCMSTB 7445 SoCsRay Jui
Add compatible string for BRCMSTB 7445 SoCs and indicate it has MSPI rev support. Signed-off-by: Ray Jui <ray.jui@broadcom.com> Acked-by: Florian Fainelli <f.fainelli@gmail.com> Link: https://lore.kernel.org/r/20200910152539.45584-2-ray.jui@broadcom.com Signed-off-by: Mark Brown <broonie@kernel.org>
2020-09-14spi: qup: remove redundant assignment to variable retColin Ian King
The variable ret is being initialized with a value that is never read and it is being updated later with a new value. The initialization is redundant and can be removed. Addresses-Coverity: ("Unused value") Signed-off-by: Colin Ian King <colin.king@canonical.com> Link: https://lore.kernel.org/r/20200910150410.750959-1-colin.king@canonical.com Signed-off-by: Mark Brown <broonie@kernel.org>
2020-09-13Merge tag 'samsung-soc-s3c-5.10' of ↵Olof Johansson
https://git.kernel.org/pub/scm/linux/kernel/git/krzk/linux into arm/soc Samsung S3C24xx and S3C64xx machine code cleanup for v5.10 Big cleanup for the Samsung S3C24xx and S3C64xx platforms, although it also touches files shared with S5Pv210 and Exynos. This is mostly Arnd Bergmann work which Krzysztof Kozlowski took over, rebased and polished. The goal is to cleanup, merge and finally make the Samsung S3C24xx and S3C64xx architectures multiplatform. The multiplatform did not happen yet here - just cleaning up and merging into one arch/arm/mach-s3c directory. However this is step forward for multiplatform or at least to keep this code still maintainable. This pulls also branch with changes for Samsung SoC sound drivers from broonie/sound because the cleanups there were part of this series and all further patches depend on them. * tag 'samsung-soc-s3c-5.10' of https://git.kernel.org/pub/scm/linux/kernel/git/krzk/linux: (62 commits) ARM: s3c: Avoid naming clash of S3C24xx and S3C64xx timer setup ARM: s3c: Cleanup from old plat-samsung include ARM: s3c: make headers local if possible ARM: s3c: move into a common directory ARM: s3c24xx: stop including mach/hardware.h from mach/io.h cpufreq: s3c24xx: move low-level clk reg access into platform code cpufreq: s3c2412: use global s3c2412_cpufreq_setrefresh ARM: s3c: remove cpufreq header dependencies cpufreq: s3c24xx: split out registers fbdev: s3c2410fb: remove mach header dependency ARM: s3c24xx: bast: avoid irq_desc array usage ARM: s3c24xx: spi: avoid hardcoding fiq number in driver ARM: s3c24xx: include mach/irqs.h where needed ARM: s3c24xx: move s3cmci pinctrl handling into board files ARM: s3c24xx: move iis pinctrl config into boards ARM: s3c24xx: move spi fiq handler into platform ARM: s3c: adc: move header to linux/soc/samsung ARM: s3c24xx: move irqchip driver back into platform ARM: s3c24xx: move regs-spi.h into spi driver ARM: s3c64xx: remove mach/hardware.h ... Link: https://lore.kernel.org/r/20200831154751.7551-1-krzk@kernel.org Signed-off-by: Olof Johansson <olof@lixom.net>
2020-09-11Merge tag 'spi-fix-v5.9-rc4' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi Pull spi fixes from Mark Brown: "There's some driver specific fixes here plus one core fix for memory leaks that could be triggered by a potential race condition when cleaning up after we have split transfers to fit into what the controller can support" * tag 'spi-fix-v5.9-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi: spi: stm32: fix pm_runtime_get_sync() error checking spi: Fix memory leak on splited transfers spi: spi-cadence-quadspi: Fix mapping of buffers for DMA reads spi: stm32: Rate-limit the 'Communication suspended' message spi: spi-loopback-test: Fix out-of-bounds read spi: spi-cadence-quadspi: Populate get_name() interface MAINTAINERS: add myself as maintainer for spi-fsl-dspi driver
generated by cgit v1.2.3-70-g09d2 (git 2.48.1) at 2025-07-29 10:39:11 +0000