- 22 Sep, 2020 2 commits
-
-
Aswath Govindraju authored
This reverts commit 13d515c7 (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: 13d515c7 ("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.comSigned-off-by:
Mark Brown <broonie@kernel.org>
-
Qinglang Miao authored
Simplify the return expression. Signed-off-by:
Qinglang Miao <miaoqinglang@huawei.com> Link: https://lore.kernel.org/r/20200921131106.93228-1-miaoqinglang@huawei.comSigned-off-by:
-
- 21 Sep, 2020 1 commit
-
-
Julia Lawall authored
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.frSigned-off-by:
-
- 17 Sep, 2020 11 commits
-
-
Mark Brown authored
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 -
Jay Fang authored
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: 8f5c285f ("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.comSigned-off-by:
-
kuldip dwivedi authored
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.comSigned-off-by:
-
Barry Song authored
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.comSigned-off-by:
-
Ricardo Ribalda authored
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.orgSigned-off-by:
-
Eddie James authored
Add a compatible string for the restricted version of the SPI controller. The restricted version cannot process sequence loop operations and therefore has a smaller transfer size. Signed-off-by:
Eddie James <eajames@linux.ibm.com> Link: https://lore.kernel.org/r/20200909222857.28653-5-eajames@linux.ibm.comSigned-off-by:
-
Eddie James authored
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:
Joel Stanley <joel@jms.id.au> Link: https://lore.kernel.org/r/20200909222857.28653-7-eajames@linux.ibm.comSigned-off-by:
-
Eddie James authored
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: bbb6b2f9 ("spi: Add FSI-attached SPI controller driver") Signed-off-by:
-
Brad Bishop authored
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: bbb6b2f9 ("spi: Add FSI-attached SPI controller driver") Signed-off-by:
Brad Bishop <bradleyb@fuzziesquirrel.com> Signed-off-by:
-
Brad Bishop authored
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 authored
The trailing <len> - 8 bytes of transfer data in this size range is no longer ignored. Fixes: bbb6b2f9 ("spi: Add FSI-attached SPI controller driver") Signed-off-by:
-
- 14 Sep, 2020 12 commits
-
-
Krzysztof Kozlowski authored
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.orgSigned-off-by:
-
Douglas Anderson authored
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@changeidSigned-off-by:
-
Jason Yan authored
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.comSigned-off-by:
-
Vladimir Oltean authored
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: 0feaf8f5 ("spi: spi-fsl-dspi: Convert the instantiations that support it to DMA") Reported-by:
Qiang Zhao <qiang.zhao@nxp.com> Tested-by:
Vladimir Oltean <vladimir.oltean@nxp.com> Link: https://lore.kernel.org/r/20200910121532.1138596-1-olteanv@gmail.comSigned-off-by:
-
Douglas Anderson authored
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 authored
In commit 902481a7 ("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:
-
Barry Song authored
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:
-
Ray Jui authored
Add compatible string for brcmstb 7445 SoCs. Signed-off-by:
Ray Jui <ray.jui@broadcom.com> Acked-by:
Florian Fainelli <f.fainelli@gmail.com> Link: https://lore.kernel.org/r/20200910152539.45584-1-ray.jui@broadcom.comSigned-off-by:
-
Ray Jui authored
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 authored
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: 3a01f04d ("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/#uSigned-off-by:
-
Ray Jui authored
Add compatible string for BRCMSTB 7445 SoCs and indicate it has MSPI rev support. Signed-off-by:
-
Colin Ian King authored
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.comSigned-off-by:
-
- 09 Sep, 2020 4 commits
-
-
Mark Brown authored
Merge series "opp: Unconditionally call dev_pm_opp_of_remove_table()" from Viresh Kumar <viresh.kumar@linaro.org>: Hello, This cleans up some of the user code around calls to dev_pm_opp_of_remove_table(). All the patches can be picked by respective maintainers directly except for the last patch, which needs the previous two to get merged first. These are based for 5.9-rc1. Rajendra, Since most of these changes are related to qcom stuff, it would be great if you can give them a try. I wasn't able to test them due to lack of hardware. Ulf, I had to revise the sdhci patch, sorry about that. Please pick this one. Diff between V1 and V2 is mentioned in each of the patches separately. Viresh Kumar (8): cpufreq: imx6q: Unconditionally call dev_pm_opp_of_remove_table() drm/lima: Unconditionally call dev_pm_opp_of_remove_table() drm/msm: Unconditionally call dev_pm_opp_of_remove_table() mmc: sdhci-msm: Unconditionally call dev_pm_opp_of_remove_table() spi: spi-geni-qcom: Unconditionally call dev_pm_opp_of_remove_table() spi: spi-qcom-qspi: Unconditionally call dev_pm_opp_of_remove_table() tty: serial: qcom_geni_serial: Unconditionally call dev_pm_opp_of_remove_table() qcom-geni-se: remove has_opp_table drivers/cpufreq/imx6q-cpufreq.c | 10 ++-------- drivers/gpu/drm/lima/lima_devfreq.c | 6 +----- drivers/gpu/drm/lima/lima_devfreq.h | 1 - drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c | 14 +++++--------- drivers/gpu/drm/msm/disp/dpu1/dpu_kms.h | 1 - drivers/gpu/drm/msm/dsi/dsi_host.c | 8 ++------ drivers/mmc/host/sdhci-msm.c | 14 +++++--------- drivers/spi/spi-geni-qcom.c | 13 +++++-------- drivers/spi/spi-qcom-qspi.c | 15 ++++++--------- drivers/tty/serial/qcom_geni_serial.c | 13 +++++-------- include/linux/qcom-geni-se.h | 2 -- 11 files changed, 31 insertions(+), 66 deletions(-) base-commit: f4d51dff -- 2.25.0.rc1.19.g042ed3e048af -
Jay Fang authored
In spidev_read() and spidev_write(), the variable status 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. Signed-off-by:
Geert Uytterhoeven <geert+renesas@glider.be> Link: https://lore.kernel.org/r/1599631704-53232-1-git-send-email-f.fangjian@huawei.comSigned-off-by:
-
Viresh Kumar authored
dev_pm_opp_of_remove_table() doesn't report any errors when it fails to find the OPP table with error -ENODEV (i.e. OPP table not present for the device). And we can call dev_pm_opp_of_remove_table() unconditionally here. While at it, create a new label and put clkname on errors. Signed-off-by:
Viresh Kumar <viresh.kumar@linaro.org> Link: https://lore.kernel.org/r/b77aa0bbe82a580508e321a34da488b4b27966d0.1598594714.git.viresh.kumar@linaro.orgSigned-off-by:
-
Viresh Kumar authored
dev_pm_opp_of_remove_table() doesn't report any errors when it fails to find the OPP table with error -ENODEV (i.e. OPP table not present for the device). And we can call dev_pm_opp_of_remove_table() unconditionally here. While at it, create a new label and put clkname on errors. Signed-off-by:
-
- 08 Sep, 2020 10 commits
-
-
Mark Brown authored
Merge series "spi: Adding support for Microchip Sparx5 SoC" from Lars Povlsen <lars.povlsen@microchip.com>: The series add support for the Sparx5 SoC SPI controller in the spi-dw-mmio.c spi driver. v5 changes: - rx-sample-delay-ns documentation changes from Rob Herring: - Drop superfluous type $ref - Add default value = 0 v4 changes: - Changed snps,rx-sample-delay-ns to snps,rx-sample-delay-ns suggested by Rob Herring (rockchip also has this property). - Added support for controller-level rx-sample-delay-ns value as well as per SPI slave value (rockchip has controller-level property). - Dropped internal mux in favor of suggested spi-mux to control bus inteface selection. v3 changes: - Added mux support for controlling SPI bus interface. This is new mux driver, bindings and added to sparx5 base DT. - Removed "microchip,spi-interface2" property in favour of "mux-controls" property in SPI controller (sparx5 only). - Changed dw_spi_sparx5_set_cs() to use the mux control instead of directly acessing "mux" register. Associated code/defines moved to mux driver. - Changed dw_spi_sparx5_set_cs() to match other similar functions in signature and avoid explicit CS toggling. - Spun off duplicated NAND device DT chunks into separate DT file. v2 changes: - Moved all RX sample delay into spi-dw-core.c, using the "snps,rx-sample-delay-ns" device property. - Integrated Sparx5 support directly in spi-dw-mmio.c - Changed SPI2 configuration to per-slave "microchip,spi-interface2" property. - Added bindings to existing snps,dw-apb-ssi.yaml file - Dropped patches for polled mode and SPI memory operations. Lars Povlsen (6): spi: dw: Add support for RX sample delay register spi: dw: Add Microchip Sparx5 support arm64: dts: sparx5: Add SPI controller and associated mmio-mux dt-bindings: snps,dw-apb-ssi: Add sparx5 support, plus rx-sample-delay-ns property arm64: dts: sparx5: Add spi-nor support arm64: dts: sparx5: Add spi-nand devices .../bindings/spi/snps,dw-apb-ssi.yaml | 21 ++++++ arch/arm64/boot/dts/microchip/sparx5.dtsi | 47 ++++++++++++- .../arm64/boot/dts/microchip/sparx5_nand.dtsi | 31 ++++++++ .../boot/dts/microchip/sparx5_pcb125.dts | 30 ++++++++ .../boot/dts/microchip/sparx5_pcb134.dts | 1 + .../dts/microchip/sparx5_pcb134_board.dtsi | 16 +++++ .../boot/dts/microchip/sparx5_pcb135.dts | 1 + .../dts/microchip/sparx5_pcb135_board.dtsi | 16 +++++ drivers/spi/spi-dw-core.c | 26 +++++++ drivers/spi/spi-dw-mmio.c | 70 ++++++++++++++++++- drivers/spi/spi-dw.h | 3 + 11 files changed, 260 insertions(+), 2 deletions(-) create mode 100644 arch/arm64/boot/dts/microchip/sparx5_nand.dtsi -- 2.27.0 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel -
Ikjoon Jang authored
Use default supports_op() to support spi-[rt]x-bus-width properties. And check dummy op's byte length instead of its bus width for output. Signed-off-by:
Ikjoon Jang <ikjn@chromium.org> Link: https://lore.kernel.org/r/20200826091852.519138-1-ikjn@chromium.orgSigned-off-by:
-
Krzysztof Kozlowski authored
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 authored
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 authored
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 authored
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 authored
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 authored
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 authored
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 authored
Common pattern of handling deferred probe can be simplified with dev_err_probe(). Less code and the error value gets printed. Signed-off-by:
-
