kernel.git/drivers/spi/Kconfig, branch linux-5.9.y

spi: Prevent adding devices below an unregistering controller

2020-08-03T15:50:43Z

CONFIG_OF_DYNAMIC and CONFIG_ACPI allow adding SPI devices at runtime using a DeviceTree overlay or DSDT patch. CONFIG_SPI_SLAVE allows the same via sysfs. But there are no precautions to prevent adding a device below a controller that's being removed. Such a device is unusable and may not even be able to unbind cleanly as it becomes inaccessible once the controller has been torn down. E.g. it is then impossible to quiesce the device's interrupt. of_spi_notify() and acpi_spi_notify() do hold a ref on the controller, but otherwise run lockless against spi_unregister_controller(). Fix by holding the spi_add_lock in spi_unregister_controller() and bailing out of spi_add_device() if the controller has been unregistered concurrently. Fixes: ce79d54ae447 ("spi/of: Add OF notifier handler") Signed-off-by: Lukas Wunner Cc: stable@vger.kernel.org # v3.19+ Cc: Geert Uytterhoeven Cc: Octavian Purdila Cc: Pantelis Antoniou Link: https://lore.kernel.org/r/a8c3205088a969dc8410eec1eba9aface60f36af.1596451035.git.lukas@wunner.de Signed-off-by: Mark Brown

spi: lantiq: Add support to Lightning Mountain SoC

2020-07-22T00:55:59Z

Add support to SPI controller on Intel Atom based Lightning Mountain SoC which reuses Lantiq SPI controller IP. Signed-off-by: Dilip Kota Link: https://lore.kernel.org/r/4d61a75381aca9479f9fc15d07a7b05534da6bb3.1594957019.git.eswara.kota@linux.intel.com Signed-off-by: Mark Brown

spi: Fix SPI NOR and SPI NAND acronyms

2020-07-16T23:55:25Z

The industry refers to these flash types as "SPI NOR" and "SPI NAND". Be consistent and use the same acronyms. Signed-off-by: Tudor Ambarus Link: https://lore.kernel.org/r/20200716051144.568606-1-tudor.ambarus@microchip.com Signed-off-by: Mark Brown

spi: atmel-quadspi: Use optimezed memcpy_fromio()/memcpy_toio()

2020-07-16T23:55:24Z

Optimezed mem*io operations are defined for LE platforms, use them. The ARM and !ARCH_EBSA110 dependencies for COMPILE_TEST were added only for the _memcpy_fromio()/_memcpy_toio() functions. Drop these dependencies. Tested unaligned accesses on both sama5d2 and sam9x60 QSPI controllers using SPI NOR flashes, everything works ok. The following performance improvement can be seen when running mtd_speedtest: sama5d2_xplained (mx25l25635e) - before: mtd_speedtest: eraseblock write speed is 983 KiB/s mtd_speedtest: eraseblock read speed is 6150 KiB/s - after: mtd_speedtest: eraseblock write speed is 1055 KiB/s mtd_speedtest: eraseblock read speed is 20144 KiB/s sam9x60ek (sst26vf064b) - before: mtd_speedtest: eraseblock write speed is 4770 KiB/s mtd_speedtest: eraseblock read speed is 8062 KiB/s - after: mtd_speedtest: eraseblock write speed is 4524 KiB/s mtd_speedtest: eraseblock read speed is 21186 KiB/s Signed-off-by: Tudor Ambarus Link: https://lore.kernel.org/r/20200716043139.565734-1-tudor.ambarus@microchip.com Signed-off-by: Mark Brown

Merge series "mtd: spi-nor: Move cadence-qaudspi to spi-mem framework" from Vignesh Raghavendra :

2020-06-19T13:26:55Z

This series is a subset of "[PATCH v12 0/4] spi: cadence-quadspi: Add support for the Cadence QSPI controller" by Ramuthevar,Vadivel MuruganX that intended to move cadence-quadspi driver to spi-mem framework Those patches were trying to accomplish too many things in a single set of patches and need to split into smaller patches. This is reduced version of above series. Changes that are intended to make migration easy are split into separate patches. Patches 1 to 3 drop features that cannot be supported under spi-mem at the moment (backward compatibility is maintained). Patch 4-5 are trivial cleanups. Patch 6 does the actual conversion to spi-mem and patch 7 moves the driver to drivers/spi folder. I have tested both INDAC mode (used by non TI platforms like Altera SoCFPGA) and DAC mode (used by TI platforms) on TI EVMs. Patches to move move bindings over to "Documentation/devicetree/bindings/spi/" directory and also conversion of bindig doc to YAML will be posted separately. Support for Intel platform would follow that. Resend v3: Rebased onto v5.7-c1 v3: Split handling of probe deferral into separate patch (out of 5/6) Split dropping of redundant WREN to separate patch (out of 5/6) Fix a possible memleak due to lack of spi_master_put() Parse all SPI slave nodes in cqspi_setup_flash() Address misc comments from Tudor on v2 Rebase onto latest spi-nor/next v2: Rework patch 1/6 to keep "cdns,is-decoded-cs" property supported. Ramuthevar Vadivel Murugan (2): mtd: spi-nor: Convert cadence-quadspi to use spi-mem framework spi: Move cadence-quadspi driver to drivers/spi/ Vignesh Raghavendra (6): mtd: spi-nor: cadence-quadspi: Make driver independent of flash geometry mtd: spi-nor: cadence-quadspi: Provide a way to disable DAC mode mtd: spi-nor: cadence-quadspi: Don't initialize rx_dma_complete on failure mtd: spi-nor: cadence-quadspi: Fix error path on failure to acquire reset lines mtd: spi-nor: cadence-quadspi: Handle probe deferral while requesting DMA channel mtd: spi-nor: cadence-quadspi: Drop redundant WREN in erase path drivers/mtd/spi-nor/controllers/Kconfig | 11 - drivers/mtd/spi-nor/controllers/Makefile | 1 - drivers/spi/Kconfig | 11 + drivers/spi/Makefile | 1 + .../spi-cadence-quadspi.c} | 541 +++++++----------- 5 files changed, 222 insertions(+), 343 deletions(-) rename drivers/{mtd/spi-nor/controllers/cadence-quadspi.c => spi/spi-cadence-quadspi.c} (74%) base-commit: b3a9e3b9622ae10064826dccb4f7a52bd88c7407 -- 2.26.2 ______________________________________________________ Linux MTD discussion mailing list http://lists.infradead.org/mailman/listinfo/linux-mtd/

spi: Move cadence-quadspi driver to drivers/spi/

2020-06-19T13:26:54Z

Now that cadence-quadspi has been converted to use spi-mem framework, move it under drivers/spi/ Update license header to match SPI subsystem style Signed-off-by: Ramuthevar Vadivel Murugan Signed-off-by: Vignesh Raghavendra Reviewed-by: Tudor Ambarus Acked-by: Tudor Ambarus Link: https://lore.kernel.org/r/20200601070444.16923-9-vigneshr@ti.com Signed-off-by: Mark Brown

spi: altera: use regmap-mmio instead of direct mmio register access

2020-06-19T11:56:04Z

This patch adds support for regmap. It makes preparation for supporting different ways to access the registers. Signed-off-by: Matthew Gerlach Signed-off-by: Wu Hao Signed-off-by: Xu Yilun Signed-off-by: Russ Weight Reviewed-by: Tom Rix Link: https://lore.kernel.org/r/1592531021-11412-2-git-send-email-yilun.xu@intel.com Signed-off-by: Mark Brown

Merge series "spi: bcm63xx: add BMIPS support" from Álvaro Fernández Rojas :

2020-06-15T23:38:41Z

BCM63xx SPI and HSSPI controller are present on several BMIPS SoCs (BCM6318, BCM6328, BCM6358, BCM6362, BCM6368 and BCM63268). v2: use devm_reset_control_get_exclusive Álvaro Fernández Rojas (4): spi: bcm63xx-spi: add reset support spi: bcm63xx-spi: allow building for BMIPS spi: bcm63xx-hsspi: add reset support spi: bcm63xx-hsspi: allow building for BMIPS drivers/spi/Kconfig | 4 ++-- drivers/spi/spi-bcm63xx-hsspi.c | 17 +++++++++++++++++ drivers/spi/spi-bcm63xx.c | 17 +++++++++++++++++ 3 files changed, 36 insertions(+), 2 deletions(-) -- 2.27.0 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

spi: add Renesas RPC-IF driver

2020-06-15T23:38:38Z

Add the SPI driver for the Renesas RPC-IF. It's the "front end" driver using the "back end" APIs in the main driver to talk to the real hardware. We only implement the 'spi-mem' interface -- there's no need to implement the usual SPI driver methods... Based on the original patch by Mason Yang . Signed-off-by: Sergei Shtylyov Link: https://lore.kernel.org/r/1ece0e6c-71af-f0f1-709e-571f4b0b4853@cogentembedded.com Signed-off-by: Mark Brown

spi: bcm63xx-hsspi: allow building for BMIPS

2020-06-15T23:17:27Z

bcm63xx-hsspi controller is present on several BMIPS SoCs (BCM6318, BCM6328, BCM6362 and BCM63268). Signed-off-by: Álvaro Fernández Rojas Acked-by: Florian Fainelli Link: https://lore.kernel.org/r/20200615090943.2936839-5-noltari@gmail.com Signed-off-by: Mark Brown