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2019-09-04spi: ath79: use devm_platform_ioremap_resource() to simplify codeYueHaibing
Use devm_platform_ioremap_resource() to simplify the code a bit. This is detected by coccinelle. Reported-by: Hulk Robot <hulkci@huawei.com> Signed-off-by: YueHaibing <yuehaibing@huawei.com> Link: https://lore.kernel.org/r/20190904135918.25352-4-yuehaibing@huawei.com Signed-off-by: Mark Brown <broonie@kernel.org>
2019-09-04spi: a3700: use devm_platform_ioremap_resource() to simplify codeYueHaibing
Use devm_platform_ioremap_resource() to simplify the code a bit. This is detected by coccinelle. Reported-by: Hulk Robot <hulkci@huawei.com> Signed-off-by: YueHaibing <yuehaibing@huawei.com> Link: https://lore.kernel.org/r/20190904135918.25352-3-yuehaibing@huawei.com Signed-off-by: Mark Brown <broonie@kernel.org>
2019-09-04spi: altera: use devm_platform_ioremap_resource() to simplify codeYueHaibing
Use devm_platform_ioremap_resource() to simplify the code a bit. This is detected by coccinelle. Reported-by: Hulk Robot <hulkci@huawei.com> Signed-off-by: YueHaibing <yuehaibing@huawei.com> Link: https://lore.kernel.org/r/20190904135918.25352-2-yuehaibing@huawei.com Signed-off-by: Mark Brown <broonie@kernel.org>
2019-09-03spi: npcm-fiu: fix spelling mistake "frequancy" -> "frequency"Colin Ian King
There is a spelling mistake in a dev_warning message. Fix it. Also break line to clear up checkpatch warning. Signed-off-by: Colin Ian King <colin.king@canonical.com> Link: https://lore.kernel.org/r/20190903122812.3986-1-colin.king@canonical.com Signed-off-by: Mark Brown <broonie@kernel.org>
2019-09-03spi: spi-fsl-dspi: Fix race condition in TCFQ/EOQ interruptVladimir Oltean
When the driver is working in TCFQ/EOQ mode (i.e. interacts with the SPI controller's FIFOs directly) the following sequence of operations happens: - The first byte of the tx buffer gets pushed to the TX FIFO (dspi->len gets decremented). This triggers the train of interrupts that handle the rest of the bytes. - The dspi_interrupt handles a TX confirmation event. It reads the newly available byte from the RX FIFO, checks the dspi->len exit condition, and if there's more to be done, it kicks off the next interrupt in the train by writing the next byte to the TX FIFO. Now the problem is that the wait queue is woken up one byte too early, because dspi->len becomes 0 as soon as the byte has been pushed into the TX FIFO. Its interrupt has not yet been processed and the RX byte has not been put from the FIFO into the buffer. Depending on the timing of the wait queue wakeup vs the handling of the last dspi_interrupt, it can happen that the main SPI message pump thread has already returned back into the spi_device driver. When the rx buffer is on stack (which it can be, because in this mode, the DSPI doesn't do DMA), the last interrupt will perform a memory write into an rx buffer that has been freed. This manifests as stack corruption. The solution is to only wake up the wait queue when dspi_rxtx says so, i.e. after it has processed the last TX confirmation interrupt and collected the last RX byte. Fixes: c55be3059159 ("spi: spi-fsl-dspi: Use poll mode in case the platform IRQ is missing") Signed-off-by: Vladimir Oltean <olteanv@gmail.com> Link: https://lore.kernel.org/r/20190903105708.32273-1-olteanv@gmail.com Signed-off-by: Mark Brown <broonie@kernel.org>
2019-09-03spi: uniphier: introduce polling modeKeiji Hayashibara
Introduce new polling mode for short size transfer. Either the estimated transfer time is estimated to exceed 200us, or polling loop actually exceeds 200us, it switches to irq mode. Signed-off-by: Keiji Hayashibara <hayashibara.keiji@socionext.com> Link: https://lore.kernel.org/r/1567488661-11428-4-git-send-email-hayashibara.keiji@socionext.com Signed-off-by: Mark Brown <broonie@kernel.org>
2019-09-03spi: uniphier: remove unnecessary codeKeiji Hayashibara
This commit removed if() because priv->is_save_param is always true. Signed-off-by: Keiji Hayashibara <hayashibara.keiji@socionext.com> Link: https://lore.kernel.org/r/1567488661-11428-3-git-send-email-hayashibara.keiji@socionext.com Signed-off-by: Mark Brown <broonie@kernel.org>
2019-09-02spi: ep93xx: Repair SPI CS lookup tablesAlexander Sverdlin
The actual device name of the SPI controller being registered on EP93xx is "spi0" (as seen by gpiod_find_lookup_table()). This patch fixes all relevant lookup tables and the following failure (seen on EDB9302): ep93xx-spi ep93xx-spi.0: failed to register SPI master ep93xx-spi: probe of ep93xx-spi.0 failed with error -22 Fixes: 1dfbf334f1236 ("spi: ep93xx: Convert to use CS GPIO descriptors") Cc: stable@vger.kernel.org Signed-off-by: Alexander Sverdlin <alexander.sverdlin@gmail.com> Reviewed-by: Linus Walleij <linus.walleij@linaro.org> Reviewed-by: Lukasz Majewski <lukma@denx.de> Link: https://lore.kernel.org/r/20190831180402.10008-1-alexander.sverdlin@gmail.com Signed-off-by: Mark Brown <broonie@kernel.org>
2019-08-30spi: bcm-qspi: Make BSPI default modeRayagonda Kokatanur
The spi-nor controller defaults to BSPI mode, hence switch back to its default mode after MSPI operations (write or erase) are completed. Signed-off-by: Rayagonda Kokatanur <rayagonda.kokatanur@broadcom.com> Reviewed-by: Mark Brown <broonie@kernel.org> Reviewed-by: Kamal Dasu <kdasu.kdev@gmail.com> Link: https://lore.kernel.org/r/1567139325-7912-1-git-send-email-rayagonda.kokatanur@broadcom.com Signed-off-by: Mark Brown <broonie@kernel.org>
2019-08-30spi: npcm-fiu: add NPCM FIU controller driverTomer Maimon
Add Nuvoton NPCM BMC Flash Interface Unit(FIU) SPI master controller driver using SPI-MEM interface. The FIU supports single, dual or quad communication interface. the FIU controller can operate in following modes: - User Mode Access(UMA): provides flash access by using an indirect address/data mechanism. - direct rd/wr mode: maps the flash memory into the core address space. - SPI-X mode: used for an expansion bus to an ASIC or CPLD. Signed-off-by: Tomer Maimon <tmaimon77@gmail.com> Link: https://lore.kernel.org/r/20190828142513.228556-3-tmaimon77@gmail.com Signed-off-by: Mark Brown <broonie@kernel.org>
2019-08-30dt-binding: spi: add NPCM FIU controllerTomer Maimon
Added device tree binding documentation for Nuvoton BMC NPCM Flash Interface Unit(FIU) SPI master controller using SPI-MEM interface. Signed-off-by: Tomer Maimon <tmaimon77@gmail.com> Link: https://lore.kernel.org/r/20190828142513.228556-2-tmaimon77@gmail.com Signed-off-by: Mark Brown <broonie@kernel.org>
2019-08-28spi: bcm2835: Convert to use CS GPIO descriptorsLinus Walleij
This converts the BCM2835 SPI master driver to use GPIO descriptors for chip select handling. The BCM2835 driver was relying on the core to drive the CS high/low so very small changes were needed for this part. If it managed to request the CS from the device tree node, all is pretty straight forward. However for native GPIOs this driver has a quite unorthodox loopback to request some GPIOs from the SoC GPIO chip by looking it up from the device tree using gpiochip_find() and then offseting hard into its numberspace. This has been augmented a bit by using gpiochip_request_own_desc() but this code really needs to be verified. If "native CS" is actually an SoC GPIO, why is it even done this way? Should this GPIO not just be defined in the device tree like any other CS GPIO? I'm confused. Cc: Lukas Wunner <lukas@wunner.de> Cc: Stefan Wahren <stefan.wahren@i2se.com> Cc: Martin Sperl <kernel@martin.sperl.org> Cc: Chris Boot <bootc@bootc.net> Signed-off-by: Linus Walleij <linus.walleij@linaro.org> Link: https://lore.kernel.org/r/20190804003852.1312-1-linus.walleij@linaro.org Signed-off-by: Mark Brown <broonie@kernel.org>
2019-08-28spi: fsl: Convert to use CS GPIO descriptorsLinus Walleij
This converts the Freescale SPI master driver to use GPIO descriptors for chip select handling. The Freescale (fsl) driver has a lot of quirks to look up "gpios" rather than "cs-gpios" from the device tree. After the prior patch that will make gpiolib return the GPIO descriptor for "gpios" in response to a request for "cs-gpios", this code can be cut down quite a bit. The driver has custom handling of chip select rather than using the core (which may be possible but not done in this patch) so it still needs to refer directly to spi->cs_gpiod to set the chip select. Cc: Shawn Guo <shawnguo@kernel.org> Cc: Sascha Hauer <s.hauer@pengutronix.de> Cc: Pengutronix Kernel Team <kernel@pengutronix.de> Cc: Fabio Estevam <festevam@gmail.com> Cc: NXP Linux Team <linux-imx@nxp.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org> Link: https://lore.kernel.org/r/20190804003539.985-1-linus.walleij@linaro.org Signed-off-by: Mark Brown <broonie@kernel.org>
2019-08-23spi: spi-fsl-dspi: Use poll mode in case the platform IRQ is missingVladimir Oltean
On platforms like LS1021A which use TCFQ mode, an interrupt needs to be processed after each byte is TXed/RXed. I tried to make the DSPI implementation on this SoC operate in other, more efficient modes (EOQ, DMA) but it looks like it simply isn't possible. Therefore allow the driver to operate in poll mode, to ease a bit of this absurd amount of IRQ load generated in TCFQ mode. Doing so reduces both the net time it takes to transmit a SPI message, as well as the inter-frame jitter that occurs while doing so. Signed-off-by: Vladimir Oltean <olteanv@gmail.com> Link: https://lore.kernel.org/r/20190822211514.19288-5-olteanv@gmail.com Signed-off-by: Mark Brown <broonie@kernel.org>
2019-08-23spi: spi-fsl-dspi: Remove impossible to reach error checkVladimir Oltean
dspi->devtype_data is under the total control of the driver. Therefore, a bad value is a driver bug and checking it at runtime (and during an ISR, at that!) is pointless. The second "else if" check is only for clarity (instead of a broader "else") in case other transfer modes are added in the future. But the printing is dead code and can be removed. Signed-off-by: Vladimir Oltean <olteanv@gmail.com> Link: https://lore.kernel.org/r/20190822211514.19288-4-olteanv@gmail.com Signed-off-by: Mark Brown <broonie@kernel.org>
2019-08-23spi: spi-fsl-dspi: Exit the ISR with IRQ_NONE when it's not oursVladimir Oltean
The DSPI interrupt can be shared between two controllers at least on the LX2160A. In that case, the driver for one controller might misbehave and consume the other's interrupt. Fix this by actually checking if any of the bits in the status register have been asserted. Fixes: 13aed2392741 ("spi: spi-fsl-dspi: use IRQF_SHARED mode to request IRQ") Signed-off-by: Vladimir Oltean <olteanv@gmail.com> Link: https://lore.kernel.org/r/20190822211514.19288-3-olteanv@gmail.com Signed-off-by: Mark Brown <broonie@kernel.org>
2019-08-23spi: spi-fsl-dspi: Reduce indentation level in dspi_interruptVladimir Oltean
If the entire function depends on the SPI status register having the interrupt bits asserted, then just check it and exit early if those bits aren't set (such as in the case of the shared IRQ being triggered for the other peripheral). Cosmetic patch. Signed-off-by: Vladimir Oltean <olteanv@gmail.com> Link: https://lore.kernel.org/r/20190822211514.19288-2-olteanv@gmail.com Signed-off-by: Mark Brown <broonie@kernel.org>
2019-08-23Merge branch 'spi-5.3' into spi-5.4Mark Brown
2019-08-23spi: spi-fsl-dspi: Exit the ISR with IRQ_NONE when it's not oursVladimir Oltean
The DSPI interrupt can be shared between two controllers at least on the LX2160A. In that case, the driver for one controller might misbehave and consume the other's interrupt. Fix this by actually checking if any of the bits in the status register have been asserted. Fixes: 13aed2392741 ("spi: spi-fsl-dspi: use IRQF_SHARED mode to request IRQ") Signed-off-by: Vladimir Oltean <olteanv@gmail.com> Link: https://lore.kernel.org/r/20190822212450.21420-2-olteanv@gmail.com Signed-off-by: Mark Brown <broonie@kernel.org> Cc: stable@vger.kernel.org
2019-08-22spi: spi-fsl-qspi: Add ls2080a compatibility string to bindingsAshish Kumar
There are 2 version of QSPI-IP, according to which controller registers sets can be big endian or little endian.There are some other minor changes like RX fifo depth etc. The big endian version uses driver compatible "fsl,ls1021a-qspi" and little endian version uses driver compatible "fsl,ls2080a-qspi" Signed-off-by: Kuldeep Singh <kuldeep.singh@nxp.com> Signed-off-by: Ashish Kumar <ashish.kumar@nxp.com> Reviewed-by: Rob Herring <robh@kernel.org> Acked-by: Han Xu <han.xu@nxp.com> Link: https://lore.kernel.org/r/1565691791-26167-1-git-send-email-Ashish.Kumar@nxp.com Signed-off-by: Mark Brown <broonie@kernel.org>
2019-08-22spi: fsl-qspi: Enhance binding to extend example for flash entryAshish Kumar
Add example for adding flash entry on various boards' dts using flash manufacture spansion/cypress. Signed-off-by: Ashish Kumar <Ashish.Kumar@nxp.com> Link: https://lore.kernel.org/r/1565691791-26167-3-git-send-email-Ashish.Kumar@nxp.com Signed-off-by: Mark Brown <broonie@kernel.org>
2019-08-20spi: spi-fsl-dspi: Move dspi_interrupt above dspi_transfer_one_messageVladimir Oltean
The two functions are loosely coupled through dspi->waitq, but logically, dspi_transfer_one_message depends on dspi_interrupt in order to complete. Move its definition above it so the I/O functions are grouped closer together. Signed-off-by: Vladimir Oltean <olteanv@gmail.com> Link: https://lore.kernel.org/r/20190818180115.31114-13-olteanv@gmail.com Signed-off-by: Mark Brown <broonie@kernel.org>
2019-08-20spi: spi-fsl-dspi: Fix typosVladimir Oltean
mask of -> mask off at and -> and Signed-off-by: Vladimir Oltean <olteanv@gmail.com> Link: https://lore.kernel.org/r/20190818180115.31114-12-olteanv@gmail.com Signed-off-by: Mark Brown <broonie@kernel.org>
2019-08-20spi: spi-fsl-dspi: Use reverse Christmas tree declaration orderVladimir Oltean
This patch puts variable declaration in the reverse order of their length for cosmetic purposes. Signed-off-by: Vladimir Oltean <olteanv@gmail.com> Link: https://lore.kernel.org/r/20190818180115.31114-11-olteanv@gmail.com Signed-off-by: Mark Brown <broonie@kernel.org>
2019-08-20spi: spi-fsl-dspi: Replace legacy spi_master names with spi_controllerVladimir Oltean
This adapts the spi-fsl-dspi driver to the API changes introduced in commit 8caab75fd2c2 ("spi: Generalize SPI "master" to "controller""). Signed-off-by: Vladimir Oltean <olteanv@gmail.com> Link: https://lore.kernel.org/r/20190818180115.31114-10-olteanv@gmail.com Signed-off-by: Mark Brown <broonie@kernel.org>
2019-08-20spi: spi-fsl-dspi: Remove pointless assignment of master->transfer to NULLVladimir Oltean
Introduced in commit 9298bc727385 ("spi: spi-fsl-dspi: Remove spi-bitbang") for less than obvious reasons, this assignment is confusing and serves no purpose. Signed-off-by: Vladimir Oltean <olteanv@gmail.com> Link: https://lore.kernel.org/r/20190818180115.31114-9-olteanv@gmail.com Signed-off-by: Mark Brown <broonie@kernel.org>
2019-08-20spi: spi-fsl-dspi: Remove unused initialization of 'ret' in dspi_probeVladimir Oltean
There is no code path for reaching 'return ret;' without it first being assigned to an error code. Therefore the initialization with 0 is pointless. Signed-off-by: Vladimir Oltean <olteanv@gmail.com> Link: https://lore.kernel.org/r/20190818180115.31114-8-olteanv@gmail.com Signed-off-by: Mark Brown <broonie@kernel.org>
2019-08-20spi: spi-fsl-dspi: Reduce indentation in dspi_release_dma()Vladimir Oltean
There is no point in surrounding an entire function block in an if condition. Rather, exit early if the condition is false. Signed-off-by: Vladimir Oltean <olteanv@gmail.com> Link: https://lore.kernel.org/r/20190818180115.31114-7-olteanv@gmail.com Signed-off-by: Mark Brown <broonie@kernel.org>
2019-08-20spi: spi-fsl-dspi: Change usage pattern of SPI_MCR_* and SPI_CTAR_* macrosVladimir Oltean
These are macros that accept 0 or 1 as argument (a boolean value). Their use encourages the abuse of complex ternary operations inside their argument list, which detracts from the code readability. Replace these with simple if-else statements. Signed-off-by: Vladimir Oltean <olteanv@gmail.com> Link: https://lore.kernel.org/r/20190818180115.31114-6-olteanv@gmail.com Signed-off-by: Mark Brown <broonie@kernel.org>
2019-08-20spi: spi-fsl-dspi: Demistify magic value in SPI_SR_CLEARVladimir Oltean
This patch adds the field definitions for the SPI_SR register. The SPI status register is write-1-to-clear and this value is written at init time. Signed-off-by: Vladimir Oltean <olteanv@gmail.com> Link: https://lore.kernel.org/r/20190818180115.31114-5-olteanv@gmail.com Signed-off-by: Mark Brown <broonie@kernel.org>
2019-08-20spi: spi-fsl-dspi: Use BIT() and GENMASK() macrosVladimir Oltean
Switch to using more idiomatic register field definitions, which makes it easier to look them up in the datasheet. Cosmetic patch. Signed-off-by: Vladimir Oltean <olteanv@gmail.com> Link: https://lore.kernel.org/r/20190818180115.31114-4-olteanv@gmail.com Signed-off-by: Mark Brown <broonie@kernel.org>
2019-08-20spi: spi-fsl-dspi: Remove unused defines and includesVladimir Oltean
This is a cosmetic patch. Signed-off-by: Vladimir Oltean <olteanv@gmail.com> Link: https://lore.kernel.org/r/20190818180115.31114-3-olteanv@gmail.com Signed-off-by: Mark Brown <broonie@kernel.org>
2019-08-20spi: spi-fsl-dspi: Fix code alignmentVladimir Oltean
This is a cosmetic patch that changes nothing except makes sure the code is aligned to the same column, which makes it easier to the eye. Signed-off-by: Vladimir Oltean <olteanv@gmail.com> Link: https://lore.kernel.org/r/20190818180115.31114-2-olteanv@gmail.com Signed-off-by: Mark Brown <broonie@kernel.org>
2019-08-20spi: Fix the number of CS lines documented as an exampleManivannan Sadhasivam
The number of CS lines is mentioned as 2 in the spi-controller binding but however in the example, 4 cs-gpios are used. Hence fix that to mention 4. Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org> Link: https://lore.kernel.org/r/20190820115000.32041-1-manivannan.sadhasivam@linaro.org Signed-off-by: Mark Brown <broonie@kernel.org>
2019-08-20spi: zynq-qspi: Fix missing spi_unregister_controller when unload moduleAxel Lin
Use devm_spi_register_controller to fix missing spi_unregister_controller when unload module. Signed-off-by: Axel Lin <axel.lin@ingics.com> Acked-by: Michal Simek <michal.simek@xilinx.com> Link: https://lore.kernel.org/r/20190818095113.2397-1-axel.lin@ingics.com Signed-off-by: Mark Brown <broonie@kernel.org>
2019-08-12spi: dw-pci: Add support for Intel Elkhart Lake PSE SPIJarkko Nikula
Add support for Intel(R) Programmable Services Engine (Intel(R) PSE) SPI controller in Intel Elkhart Lake when interface is assigned to the host processor. Signed-off-by: Jarkko Nikula <jarkko.nikula@linux.intel.com> Link: https://lore.kernel.org/r/20190812101344.3975-1-jarkko.nikula@linux.intel.com Signed-off-by: Mark Brown <broonie@kernel.org>
2019-08-08spi: Rename of_spi_register_master() functionLinus Walleij
Rename this function to of_spi_get_gpio_numbers() as this is what the function does, it does not register a master, it is called in the path of registering a master so the name is logical in a convoluted way, but it is better to follow Rusty Russell's ABI level no 7: "The obvious use is (probably) the correct one" Signed-off-by: Linus Walleij <linus.walleij@linaro.org> Link: https://lore.kernel.org/r/20190808150321.23319-1-linus.walleij@linaro.org Signed-off-by: Mark Brown <broonie@kernel.org>
2019-08-07spi: sh-msiof: Use devm_platform_ioremap_resource() helperGeert Uytterhoeven
Use the devm_platform_ioremap_resource() helper instead of open-coding the same operation. Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> Link: https://lore.kernel.org/r/20190807085213.24666-1-geert+renesas@glider.be Signed-off-by: Mark Brown <broonie@kernel.org>
2019-08-07spi: bcm-qspi: Fix BSPI QUAD and DUAL mode support when using flex modeRayagonda Kokatanur
Fix data transfer width settings based on DT field 'spi-rx-bus-width' to configure BSPI in single, dual or quad mode by using data width and not the command width. Fixes: 5f195ee7d830c ("spi: bcm-qspi: Implement the spi_mem interface") Signed-off-by: Rayagonda Kokatanur <rayagonda.kokatanur@broadcom.com> Link: https://lore.kernel.org/r/1565086070-28451-1-git-send-email-rayagonda.kokatanur@broadcom.com Signed-off-by: Mark Brown <broonie@kernel.org>
2019-08-02spi: atmel: add tracing to custom .transfer_one_message callbackUwe Kleine-König
Driver specific implementations for .transfer_one_message need to call the tracing stuff themself. This is necessary to make spi tracing actually useful. Signed-off-by: Uwe Kleine-König <uwe@kleine-koenig.org> Link: https://lore.kernel.org/r/20190801204710.27309-1-uwe@kleine-koenig.org Signed-off-by: Mark Brown <broonie@kernel.org>
2019-08-02spi: Remove dev_err() usage after platform_get_irq()Stephen Boyd
We don't need dev_err() messages when platform_get_irq() fails now that platform_get_irq() prints an error message itself when something goes wrong. Let's remove these prints with a simple semantic patch. // <smpl> @@ expression ret; struct platform_device *E; @@ ret = ( platform_get_irq(E, ...) | platform_get_irq_byname(E, ...) ); if ( \( ret < 0 \| ret <= 0 \) ) { ( -if (ret != -EPROBE_DEFER) -{ ... -dev_err(...); -... } | ... -dev_err(...); ) ... } // </smpl> While we're here, remove braces on if statements that only have one statement (manually). Cc: Mark Brown <broonie@kernel.org> Cc: linux-spi@vger.kernel.org Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Stephen Boyd <swboyd@chromium.org> Link: https://lore.kernel.org/r/20190730181557.90391-42-swboyd@chromium.org Signed-off-by: Mark Brown <broonie@kernel.org>
2019-08-02spi: Reduce kthread priorityPeter Zijlstra
The SPI thingies request FIFO-99 by default, reduce this to FIFO-50. FIFO-99 is the very highest priority available to SCHED_FIFO and it not a suitable default; it would indicate the SPI work is the most important work on the machine. Cc: Benson Leung <bleung@chromium.org> Cc: Enric Balletbo i Serra <enric.balletbo@collabora.com> Cc: Guenter Roeck <groeck@chromium.org> Cc: Mark Brown <broonie@kernel.org> Cc: linux-spi@vger.kernel.org Cc: linux-kernel@vger.kernel.org Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Reviewed-by: Douglas Anderson <dianders@chromium.org> Link: https://lore.kernel.org/r/20190801111541.917256884@infradead.org Signed-off-by: Mark Brown <broonie@kernel.org>
2019-08-02spi: pxa2xx: Add support for Intel Tiger LakeJarkko Nikula
Intel Tiger Lake -LP LPSS SPI controller is otherwise similar than Cannon Lake but has more controllers and up to two chip selects per controller. Signed-off-by: Jarkko Nikula <jarkko.nikula@linux.intel.com> Link: https://lore.kernel.org/r/20190801134901.12635-1-jarkko.nikula@linux.intel.com Signed-off-by: Mark Brown <broonie@kernel.org>
2019-08-01spi: core: Use DEVICE_ATTR_RW() for SPI slave control sysfs attributeGeert Uytterhoeven
Convert the SPI slave control sysfs attribute from DEVICE_ATTR() to DEVICE_ATTR_RW(), to reduce boilerplate. Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> Link: https://lore.kernel.org/r/20190731124738.14519-1-geert+renesas@glider.be Signed-off-by: Mark Brown <broonie@kernel.org>
2019-07-26spi: sprd: Change the hwlock support to be optionalBaolin Wang
No need to add hardware spinlock proctection due to add multiple msater channel, so change it to be optional in documentation. Signed-off-by: Baolin Wang <baolin.wang@linaro.org> Link: https://lore.kernel.org/r/23d51f5d9c9cc647ad0c5a1fb950d3d9fb9c1303.1564125131.git.baolin.wang@linaro.org Signed-off-by: Mark Brown <broonie@kernel.org>
2019-07-26spi: sprd: adi: Change hwlock to be optionalBaolin Wang
Now Spreadtrum ADI controller supplies multiple master accessing channel to support multiple subsystems accessing, instead of using a hardware spinlock to synchronize between the multiple subsystems. To keep backward compatibility, we should change the hardware spinlock to be optional. Moreover change to use of_hwspin_lock_get_id() function which return -ENOENT error number to indicate no hwlock support. Signed-off-by: Baolin Wang <baolin.wang@linaro.org> Link: https://lore.kernel.org/r/2abe7dcf210e4197f8c5ece7fc6d6cc1eda8c655.1564125131.git.baolin.wang@linaro.org Signed-off-by: Mark Brown <broonie@kernel.org>
2019-07-26spi: sprd: adi: Add a reset reason for watchdog modeSherry Zong
When the system was rebooted by watchdog, now we did not save the watchdog reset mode which will make system enter a incorrect mode after rebooting. Thus we should set the watchdog reset mode as default when opening the watchdog configuration, that means if the system was rebooted by other reason through the restart_handler(), then we will clear the default watchdog reset mode to save the correct reset mode. Signed-off-by: Sherry Zong <sherry.zong@unisoc.com> Signed-off-by: Baolin Wang <baolin.wang@linaro.org> Link: https://lore.kernel.org/r/1563f3de43c6c2262d597a25d6138b5de61ea23d.1564125131.git.baolin.wang@linaro.org Signed-off-by: Mark Brown <broonie@kernel.org>
2019-07-26spi: sprd: adi: Add a reset reason for factory test modeSherry Zong
Add a new reset flag to indicate that the system need enter factory test mode after restarting system. Signed-off-by: Sherry Zong <sherry.zong@unisoc.com> Signed-off-by: Baolin Wang <baolin.wang@linaro.org> Link: https://lore.kernel.org/r/8ae5651e876b527920ff878721a8a8ef47b099ac.1564125131.git.baolin.wang@linaro.org Signed-off-by: Mark Brown <broonie@kernel.org>
2019-07-26spi: sprd: adi: Add a reset reason for TOS panicChenxu Wei
Add a new reset flag to indicate the reset reason is caused by TOS. Signed-off-by: Chenxu Wei <weicx@spreadst.com> Signed-off-by: Baolin Wang <baolin.wang@linaro.org> Link: https://lore.kernel.org/r/97583aad1f2b849d69b4e76e8d29113da72a9fff.1564125131.git.baolin.wang@linaro.org Signed-off-by: Mark Brown <broonie@kernel.org>
2019-07-26spi: sprd: adi: Remove redundant address bits settingBaolin Wang
The ADI default transfer address bits is 12bit on Spreadtrum SC9860 platform, thus there is no need to set again, remove it. Signed-off-by: Baolin Wang <baolin.wang@linaro.org> Link: https://lore.kernel.org/r/3cb57b8aadb7747a9f833e9b4fe8596ba738d9f6.1564125131.git.baolin.wang@linaro.org Signed-off-by: Mark Brown <broonie@kernel.org>
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