- 09 Jan, 2020 2 commits
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Lukas Wunner authored
The "RevPi Connect Flat" PLC offered by KUNBUS has 4 slaves attached to the BCM2835 SPI master. Raise the maximum number of slaves in the driver accordingly. Signed-off-by:
Lukas Wunner <lukas@wunner.de> Reviewed-by:
Nicolas Saenz Julienne <nsaenzjulienne@suse.de> Link: https://lore.kernel.org/r/01453fd062de2d49bd74a847e13a0781cbf8143d.1578572268.git.lukas@wunner.deSigned-off-by:
Mark Brown <broonie@kernel.org>
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Krzysztof Kozlowski authored
STR is a well-known stringify macro so it should be avoided in drivers to avoid warnings like this (MIPS architecture while compile testing): drivers/spi/spi-sh-msiof.c:76:0: warning: "STR" redefined #define STR 0x40 /* Status Register */ arch/mips/include/asm/mipsregs.h:30:0: note: this is the location of the previous definition #define STR(x) __STR(x) To maintain consistency between all register names add a SI prefix to all of them. This also matches register names in datasheet. Signed-off-by:Krzysztof Kozlowski <krzk@kernel.org> Reviewed-by:
Geert Uytterhoeven <geert+renesas@glider.be> Tested-by:
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- 07 Jan, 2020 7 commits
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Geert Uytterhoeven authored
Add support for GPIO chip selects using GPIO descriptors. As the RSPI controller always drives a native chip select when performing a transfer, at least one native chip select must be left unused. Signed-off-by:
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Geert Uytterhoeven authored
RSPI variants on some SuperH or R-Mobile SoCs support multiple native chip selects. Add support for this by configuring the SSL Assert Signal Setting. Signed-off-by:
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Geert Uytterhoeven authored
The set_config_register() macro is used in a single place. Make the code easier to read by just removing it. Signed-off-by:
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Geert Uytterhoeven authored
Use the helper introduced by commit e135303b ("device: Add dev_<level>_once variants") instead of open-coding the same operation. Signed-off-by:
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Geert Uytterhoeven authored
Currently the MSIOF SPI driver uses custom code to handle the unused native chip select with GPIO chip selects. Convert the driver to use the new generic handling in the SPI core. Signed-off-by:
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Geert Uytterhoeven authored
Some SPI master controllers always drive a native chip select when performing a transfer. Hence when using both native and GPIO chip selects, at least one native chip select must be left unused, to be driven when performing transfers with slave devices using GPIO chip selects. Currently, to find an unused native chip select, SPI controller drivers need to parse and process cs-gpios theirselves. This is not only duplicated in each driver that needs it, but also duplicates part of the work done later at SPI controller registration time. Note that this cannot be done after spi_register_controller() returns, as at that time, slave devices may have been probed already. Hence add generic support to the SPI subsystem for finding an unused native chip select. Optionally, this unused native chip select, and all other in-use native chip selects, can be validated against the maximum number of native chip selects available on the controller hardware. Signed-off-by:
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Rayagonda Kokatanur authored
Use platform_get_irq_byname_optional() instead of platform_get_irq_byname() to avoid below error message during probe: [3.265115] bcm_iproc 68c70200.spi: IRQ spi_lr_fullness_reached not found [3.272121] bcm_iproc 68c70200.spi: IRQ spi_lr_session_aborted not found [3.284965] bcm_iproc 68c70200.spi: IRQ spi_lr_impatient not found [3.291344] bcm_iproc 68c70200.spi: IRQ spi_lr_session_done not found [3.297992] bcm_iproc 68c70200.spi: IRQ mspi_done not found [3.303742] bcm_iproc 68c70200.spi: IRQ mspi_halted not found Signed-off-by:
Rayagonda Kokatanur <rayagonda.kokatanur@broadcom.com> Link: https://lore.kernel.org/r/20200107040912.16426-1-rayagonda.kokatanur@broadcom.comSigned-off-by:
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- 27 Dec, 2019 2 commits
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Vladimir Oltean authored
We can catch whether the SPI controller has declared it can take care of software timestamping transfers, but didn't. So do it. Signed-off-by:
Vladimir Oltean <olteanv@gmail.com> Link: https://lore.kernel.org/r/20191227012444.1204-1-olteanv@gmail.comSigned-off-by:
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Linus Walleij authored
Switch the OC Tiny driver over to handling CS GPIOs using GPIO descriptors in the core. This driver is entirely relying on GPIOs to be used for chipselect, so let the core pick these out using either device tree or machine descriptors. There are no in-tree users of this driver so no board files need to be patched, out-of-tree boardfiles can use machine descriptor tables, c.f. commit 1dfbf334. Cc: Thomas Chou <thomas@wytron.com.tw> Signed-off-by:
Linus Walleij <linus.walleij@linaro.org> Link: https://lore.kernel.org/r/20191205092411.64341-1-linus.walleij@linaro.orgSigned-off-by:
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- 25 Dec, 2019 8 commits
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Kunihiko Hayashi authored
This adds DMA transfer mode support for UniPhier SPI controller. Since this controller requires simulteaneous transmission and reception, this indicates SPI_CONTROLLER_MUST_RX and SPI_CONTROLLER_MUST_TX. Because the supported dma controller has alignment restiction, there is also a restriction that 'maxburst' parameters in dma_slave_config corresponds to one word width. Signed-off-by:
Kunihiko Hayashi <hayashi.kunihiko@socionext.com> Link: https://lore.kernel.org/r/1577149107-30670-6-git-send-email-hayashi.kunihiko@socionext.comSigned-off-by:
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zhengbin authored
Fixes coccicheck warning: drivers/spi/spi-tegra114.c:272:2-17: WARNING: Assignment of 0/1 to bool variable drivers/spi/spi-tegra114.c:275:2-17: WARNING: Assignment of 0/1 to bool variable Reported-by:
Hulk Robot <hulkci@huawei.com> Signed-off-by:
zhengbin <zhengbin13@huawei.com> Link: https://lore.kernel.org/r/1577159526-33689-4-git-send-email-zhengbin13@huawei.comSigned-off-by:
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zhengbin authored
Fixes coccicheck warning: drivers/spi/spi-imx.c:1233:2-17: WARNING: Assignment of 0/1 to bool variable drivers/spi/spi-imx.c:1235:2-17: WARNING: Assignment of 0/1 to bool variable Reported-by:
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zhengbin authored
Fixes coccicheck warning: drivers/spi/spi-fsl-lpspi.c:472:2-19: WARNING: Assignment of 0/1 to bool variable drivers/spi/spi-fsl-lpspi.c:474:2-19: WARNING: Assignment of 0/1 to bool variable Reported-by:
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Kunihiko Hayashi authored
This adds master->handle_err() callback function to stop transfer due to error. The function also resets FIFOs and disables interrupt. Signed-off-by:
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Kunihiko Hayashi authored
This changes each argument of functions uniphier_irq_{enable,disable}() to uniphier_spi_priv because these functions are used not only for spi_device but also for the entire controller. Signed-off-by: -
Kunihiko Hayashi authored
Rx threshold means the value to inform the receiver when the number of words in Rx FIFO is equal to or more than the value. Similarly, Tx threshold means the value to inform the sender when the number of words in Tx FIFO is equal to or less than the value. The controller triggers the driver to start the transfer. In case of Rx, the driver wants to detect that the specified number of words N are in Rx FIFO, so the value of Rx threshold should be N. In case of Tx, the driver wants to detect that the same number of spaces as Rx are in Tx FIFO, so the value of Tx threshold should be (FIFO size - N). For example, in order for the driver to receive at least 3 words from Rx FIFO, set 3 to Rx threshold. +-+-+-+-+-+-+-+-+ | | | | | |*|*|*| +-+-+-+-+-+-+-+-+ In order for the driver to send at least 3 words to Tx FIFO, because it needs at least 3 spaces, set 8(FIFO size) - 3 = 5 to Tx threshold. +-+-+-+-+-+-+-+-+ |*|*|*|*|*| | | | +-+-+-+-+-+-+-+-+ This adds new function uniphier_spi_set_fifo_threshold() to set threshold value to the register. And more, FIFO counts by 'words', so this renames 'fill_bytes' with 'fill_words', and fixes the calculation using bytes_per_words. Fixes: 37ffab81 ("spi: uniphier: introduce polling mode") Cc: Keiji Hayashibara <hayashibara.keiji@socionext.com> Signed-off-by:
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- 18 Dec, 2019 1 commit
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Benjamin Gaignard authored
Convert the STM32 spi binding to DT schema format using json-schema Signed-off-by:
Benjamin Gaignard <benjamin.gaignard@st.com> CC: Erwan Leray <erwan.leray@st.com> CC: Fabrice Gasnier <fabrice.gasnier@st.com> CC: Amelie Delaunay <amelie.delaunay@st.com> Reviewed-by:
Rob Herring <robh@kernel.org> Link: https://lore.kernel.org/r/20191217090715.13334-1-benjamin.gaignard@st.comSigned-off-by:
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- 17 Dec, 2019 2 commits
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Jim Quinlan authored
Use dev_dbg() on -EPROBE_DEFER and dev_err() on all other errors. Signed-off-by:
Jim Quinlan <jquinlan@broadcom.com> Reviewed-by:
Florian Fainelli <f.fainelli@gmail.com> Reviewed-by:
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Jean Pihet authored
The fclk and its rate are retrieved from DT. Signed-off-by:
Jean Pihet <jean.pihet@newoldbits.com> Cc: Ryan Barnett <ryan.barnett@rockwellcollins.com> Cc: Conrad Ratschan <conrad.ratschan@rockwellcollins.com> Cc: Arnout Vandecappelle <arnout.vandecappelle@essensium.com> Link: https://lore.kernel.org/r/20191211193954.747745-2-jean.pihet@newoldbits.comSigned-off-by:
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- 16 Dec, 2019 12 commits
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Linus Walleij authored
Instead of grabbing GPIOs using the legacy interface and handling them in the setup callback, just let the core grab and use the GPIOs using descriptors. Cc: Neil Armstrong <narmstrong@baylibre.com> Cc: Sunny Luo <sunny.luo@amlogic.com> Signed-off-by:
Neil Armstrong <narmstrong@baylibre.com> Link: https://lore.kernel.org/r/20191205083915.27650-1-linus.walleij@linaro.orgSigned-off-by:
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Peter Ujfalusi authored
dma_request_slave_channel() is a wrapper on top of dma_request_chan() eating up the error code. By using dma_request_chan() directly the driver can support deferred probing against DMA. Signed-off-by:
Peter Ujfalusi <peter.ujfalusi@ti.com> Link: https://lore.kernel.org/r/20191212135550.4634-10-peter.ujfalusi@ti.comSigned-off-by:
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Peter Ujfalusi authored
dma_request_slave_channel() is a wrapper on top of dma_request_chan() eating up the error code. By using dma_request_chan() directly the driver can support deferred probing against DMA. Signed-off-by:
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Peter Ujfalusi authored
dma_request_slave_channel() is a wrapper on top of dma_request_chan() eating up the error code. By using dma_request_chan() directly the driver can support deferred probing against DMA. Signed-off-by:
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Peter Ujfalusi authored
dma_request_slave_channel() is a wrapper on top of dma_request_chan() eating up the error code. By using dma_request_chan() directly the driver can support deferred probing against DMA. Signed-off-by:
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Peter Ujfalusi authored
dma_request_slave_channel() is a wrapper on top of dma_request_chan() eating up the error code. By using dma_request_chan() directly the driver can support deferred probing against DMA. Signed-off-by:
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Peter Ujfalusi authored
dma_request_slave_channel() is a wrapper on top of dma_request_chan() eating up the error code. By using dma_request_chan() directly the driver can support deferred probing against DMA. Signed-off-by:
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Peter Ujfalusi authored
dma_request_slave_channel() is a wrapper on top of dma_request_chan() eating up the error code. By using dma_request_chan() directly the driver can support deferred probing against DMA. Signed-off-by:
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Peter Ujfalusi authored
The DMA channel was not released if either devm_request_irq() or devm_spi_register_controller() failed. Signed-off-by:
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Peter Ujfalusi authored
dma_request_slave_channel() is a wrapper on top of dma_request_chan() eating up the error code. By using dma_request_chan() directly the driver can support deferred probing against DMA. Signed-off-by:
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Christophe Leroy authored
Unlike irq_of_parse_and_map() which has a dummy definition on SPARC, of_irq_to_resource() hasn't. But as platform_get_irq() can be used instead and is generic, use it. Reported-by:
kbuild test robot <lkp@intel.com> Suggested-by:
Christophe Leroy <christophe.leroy@c-s.fr> Link: https://lore.kernel.org/r/091a277fd0b3356dca1e29858c1c96983fc9cb25.1576172743.git.christophe.leroy@c-s.frSigned-off-by:
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Michael Walle authored
Make use of a core helper to ensure the desired width is respected when calling spi-mem operators. Otherwise only the SPI controller will be matched with the flash chip, which might lead to wrong widths. Also consider the width specified by the user in the device tree. Fixes: a5356aef ("spi: spi-mem: Add driver for NXP FlexSPI controller") Signed-off-by:
Michael Walle <michael@walle.cc> Link: https://lore.kernel.org/r/20191211195730.26794-1-michael@walle.ccSigned-off-by:
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- 11 Dec, 2019 3 commits
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Geert Uytterhoeven authored
Since commits 05104c26 ("ARM: shmobile: r7s72100: genmai: Remove legacy board file") and a483dcbf ("ARM: shmobile: lager: Remove legacy board support", RZ/A1 and R-Car Gen2 SoCs are only supported in generic DT-only ARM multi-platform builds. The driver doesn't need to match platform devices by name anymore for these platforms, hence remove the corresponding platform_device_id entries. The platform_device_id entry for "rspi" is retained, as it is used by the SH7757 platform, which hasn't been converted to DT yet. Signed-off-by:
Simon Horman <horms+renesas@verge.net.au> Link: https://lore.kernel.org/r/20191211131553.23960-1-geert+renesas@glider.beSigned-off-by:
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Aditya Pakki authored
If dws is NULL in dw_spi_host_add(), we return the error to the upper callers instead of crashing. The patch replaces BUG_ON by returning -EINVAL to the caller. Signed-off-by:
Aditya Pakki <pakki001@umn.edu> Link: https://lore.kernel.org/r/20191205231421.9333-1-pakki001@umn.eduSigned-off-by:
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Vignesh Raghavendra authored
When switching ChipSelect from default CS0 to any other CS, driver fails to update the bits in system control module register that control which CS is mapped for MMIO access. This causes reads to fail when driver tries to access QSPI flash on CS1/2/3. Fix this by updating appropriate bits whenever active CS changes. Reported-by:
Andreas Dannenberg <dannenberg@ti.com> Signed-off-by:
Vignesh Raghavendra <vigneshr@ti.com> Link: https://lore.kernel.org/r/20191211155216.30212-1-vigneshr@ti.comSigned-off-by:
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- 09 Dec, 2019 3 commits
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Linus Walleij authored
The ->chipselect() callback on the bit-banged SPI library master is optional if using GPIO descriptors: when using descriptors exclusively without any native chipselects, the core does not even call out the the native ->set_cs() and therefore ->chipselect() on a bit-banged SPI master will not even be called in this case. Make sure to respect the SPI_MASTER_GPIO_SS as used by e.g. spi-gpio.c though: this setting will make the core handle the chip select using GPIO descriptors *AND* call the local chipselect handler. Signed-off-by:
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Linus Walleij authored
This switches the STM32 SPI driver over to using GPIO descriptors for chip select. Instead of the callbacks for picking the GPIO lines using the legacy API we just let the core handle it all using descriptors. Cc: Fabien Dessenne <fabien.dessenne@st.com> Cc: Amelie Delaunay <amelie.delaunay@st.com> Cc: Cezary Gapinski <cezary.gapinski@gmail.com> Signed-off-by:
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zhengbin authored
Fixes coccicheck warning: drivers/spi/spi-topcliff-pch.c:866:47-48: Unneeded semicolon drivers/spi/spi-topcliff-pch.c:881:53-54: Unneeded semicolon Reported-by:
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