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path: root/drivers/spi
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2023-08-07spi: davinci: switch to use modern nameYang Yingliang
Change legacy name master to modern name host or controller. No functional changed. Signed-off-by: Yang Yingliang <yangyingliang@huawei.com> Link: https://lore.kernel.org/r/20230728093221.3312026-18-yangyingliang@huawei.com Signed-off-by: Mark Brown <broonie@kernel.org>
2023-08-07spi: coldfire-qspi: switch to use modern nameYang Yingliang
Change legacy name master to modern name host or controller. No functional changed. Signed-off-by: Yang Yingliang <yangyingliang@huawei.com> Link: https://lore.kernel.org/r/20230728093221.3312026-17-yangyingliang@huawei.com Signed-off-by: Mark Brown <broonie@kernel.org>
2023-08-07spi: spi-cavium-thunderx: switch to use modern nameYang Yingliang
Change legacy name master to modern name host or controller. No functional changed. Signed-off-by: Yang Yingliang <yangyingliang@huawei.com> Link: https://lore.kernel.org/r/20230728093221.3312026-16-yangyingliang@huawei.com Signed-off-by: Mark Brown <broonie@kernel.org>
2023-08-07spi: octeon: switch to use modern nameYang Yingliang
Change legacy name master to modern name host or controller. No functional changed. Signed-off-by: Yang Yingliang <yangyingliang@huawei.com> Link: https://lore.kernel.org/r/20230728093221.3312026-15-yangyingliang@huawei.com Signed-off-by: Mark Brown <broonie@kernel.org>
2023-08-07spi: clps711x: switch to use modern nameYang Yingliang
Change legacy name master to modern name host or controller. No functional changed. Signed-off-by: Yang Yingliang <yangyingliang@huawei.com> Link: https://lore.kernel.org/r/20230728093221.3312026-14-yangyingliang@huawei.com Signed-off-by: Mark Brown <broonie@kernel.org>
2023-08-07spi: cadence: switch to use modern nameYang Yingliang
Change legacy name master/slave to modern name host/target or controller. No functional changed. Signed-off-by: Yang Yingliang <yangyingliang@huawei.com> Link: https://lore.kernel.org/r/20230728093221.3312026-13-yangyingliang@huawei.com Signed-off-by: Mark Brown <broonie@kernel.org>
2023-08-07spi: cadence-xspi: switch to use modern nameYang Yingliang
Change legacy name master to modern name host or controller. No functional changed. Signed-off-by: Yang Yingliang <yangyingliang@huawei.com> Link: https://lore.kernel.org/r/20230728093221.3312026-12-yangyingliang@huawei.com Signed-off-by: Mark Brown <broonie@kernel.org>
2023-08-07spi: butterfly: switch to use modern nameYang Yingliang
Change legacy name master to modern name host or controller. No functional changed. Signed-off-by: Yang Yingliang <yangyingliang@huawei.com> Link: https://lore.kernel.org/r/20230728093221.3312026-10-yangyingliang@huawei.com Signed-off-by: Mark Brown <broonie@kernel.org>
2023-08-07spi: bcm63xx: switch to use modern nameYang Yingliang
Change legacy name master to modern name host or controller. No functional changed. Signed-off-by: Yang Yingliang <yangyingliang@huawei.com> Link: https://lore.kernel.org/r/20230728093221.3312026-9-yangyingliang@huawei.com Signed-off-by: Mark Brown <broonie@kernel.org>
2023-08-07spi: bcm63xx-hsspi: switch to use modern nameYang Yingliang
Change legacy name master to modern name host or controller. No functional changed. Signed-off-by: Yang Yingliang <yangyingliang@huawei.com> Link: https://lore.kernel.org/r/20230728093221.3312026-8-yangyingliang@huawei.com Signed-off-by: Mark Brown <broonie@kernel.org>
2023-08-07spi: bcm2835aux: switch to use modern nameYang Yingliang
Change legacy name master to modern name host or controller. No functional changed. Signed-off-by: Yang Yingliang <yangyingliang@huawei.com> Link: https://lore.kernel.org/r/20230728093221.3312026-7-yangyingliang@huawei.com Signed-off-by: Mark Brown <broonie@kernel.org>
2023-08-07spi: bcm2835: switch to use modern nameYang Yingliang
Change legacy name master/slave to modern name host/target. No functional changed. Signed-off-by: Yang Yingliang <yangyingliang@huawei.com> Link: https://lore.kernel.org/r/20230728093221.3312026-6-yangyingliang@huawei.com Signed-off-by: Mark Brown <broonie@kernel.org>
2023-08-07spi: bcm-qspi: switch to use modern nameYang Yingliang
Change legacy name master to modern name host or controller. No functional changed. Signed-off-by: Yang Yingliang <yangyingliang@huawei.com> Link: https://lore.kernel.org/r/20230728093221.3312026-5-yangyingliang@huawei.com Signed-off-by: Mark Brown <broonie@kernel.org>
2023-08-07spi: spi-axi-spi-engine: switch to use modern nameYang Yingliang
Change legacy name master to modern name host or controller. No functional changed. Signed-off-by: Yang Yingliang <yangyingliang@huawei.com> Link: https://lore.kernel.org/r/20230728093221.3312026-4-yangyingliang@huawei.com Signed-off-by: Mark Brown <broonie@kernel.org>
2023-08-07spi: aspeed: switch to use modern nameYang Yingliang
Change legacy name master to modern name host or controller. No functional changed. Signed-off-by: Yang Yingliang <yangyingliang@huawei.com> Link: https://lore.kernel.org/r/20230728093221.3312026-3-yangyingliang@huawei.com Signed-off-by: Mark Brown <broonie@kernel.org>
2023-08-07spi: amd: switch to use modern nameYang Yingliang
Change legacy name master to modern name host or controller. No functional changed. Signed-off-by: Yang Yingliang <yangyingliang@huawei.com> Link: https://lore.kernel.org/r/20230728093221.3312026-2-yangyingliang@huawei.com Signed-off-by: Mark Brown <broonie@kernel.org>
2023-08-04spi: cadence-quadspi: Add clock configuration for StarFive JH7110 QSPIWilliam Qiu
Add JH7110's clock initialization code to the driver. Signed-off-by: William Qiu <william.qiu@starfivetech.com> Reviewed-by: Hal Feng <hal.feng@starfivetech.com> Link: https://lore.kernel.org/r/20230804020254.291239-3-william.qiu@starfivetech.com Signed-off-by: Mark Brown <broonie@kernel.org>
2023-08-03spi: mpc5xxx-psc: Fix unsigned expression compared with zeroLi Zetao
There is two warnings reported by coccinelle: ./drivers/spi/spi-mpc512x-psc.c:493:5-13: WARNING: Unsigned expression compared with zero: mps -> irq < 0 ./drivers/spi/spi-mpc52xx-psc.c:332:5-13: WARNING: Unsigned expression compared with zero: mps -> irq < 0 The commit "208ee586f862" ("spi: mpc5xxx-psc: Return immediately if IRQ resource is unavailable") was to check whether the IRQ resource is unavailable. When the IRQ resource is unavailable, an error code is returned, however, the type of "mps->irq" is "unsigned int", causing the error code to flip. Modify the type of "mps->irq" to solve this problem. Fixes: 208ee586f862 ("spi: mpc5xxx-psc: Return immediately if IRQ resource is unavailable") Signed-off-by: Li Zetao <lizetao1@huawei.com> Link: https://lore.kernel.org/r/20230803134805.1037251-1-lizetao1@huawei.com Signed-off-by: Mark Brown <broonie@kernel.org>
2023-08-03spi: fsl-spi: Do not check 0 for platform_get_irq()Zhu Wang
Since platform_get_irq() never returned zero, so it need not to check whether it returned zero, and we use the return error code of platform_get_irq() to replace the current return error code, for that platform_get_irq() may return -EINVAL or -ENXIO. Signed-off-by: Zhu Wang <wangzhu9@huawei.com> Link: https://lore.kernel.org/r/20230803083944.21501-1-wangzhu9@huawei.com Signed-off-by: Mark Brown <broonie@kernel.org>
2023-07-31spi-geni-qcom: Add SPI device mode support for GENIMark Brown
Merge series from Praveen Talari <quic_ptalari@quicinc.com>: This series adds spi device mode functionality to geni based Qupv3. The common header file contains spi slave related registers and masks. Praveen Talari (2): soc: qcom: geni-se: Add SPI Device mode support for GENI based QuPv3 spi: spi-geni-qcom: Add SPI Device mode support for GENI based QuPv3 --- v6 -> v7: - Corrected author mail v5 -> v6: - Added code comments - Dropped get_spi_master api v4 -> v5: - Addressed review comments in driver v3 -> v4: - Used existing property spi-slave - Hence dropped dt-binding changes v2 -> v3: - Modified commit message - Addressed comment on dt-binding v1 -> v2: - Added dt-binding change for spi slave - Modified commit message - Addressed review comments in driver drivers/spi/spi-geni-qcom.c | 53 ++++++++++++++++++++++++++++---- include/linux/soc/qcom/geni-se.h | 9 ++++++ 2 files changed, 56 insertions(+), 6 deletions(-) -- 2.17.1
2023-07-31spi: loongson: add bus driver for the loongson spi controllerYinbo Zhu
This bus driver supports the Loongson SPI hardware controller in the Loongson platforms and supports the use DTS and PCI framework to register SPI device resources. Signed-off-by: Yinbo Zhu <zhuyinbo@loongson.cn> Cc: Andy Shevchenko <andy.shevchenko@gmail.com> Cc: Mark Brown <broonie@kernel.org> Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com> Link: https://lore.kernel.org/r/20230613075834.5219-3-zhuyinbo@loongson.cn Signed-off-by: Mark Brown <broonie@kernel.org>
2023-07-31spi: spi-geni-qcom: Add SPI Device mode support for GENI based QuPv3Praveen Talari
Currently spi geni driver supports only master mode operation. Add spi device mode support to GENI based QuPv3. Signed-off-by: Praveen Talari <quic_ptalari@quicinc.com> Reviewed-by: Vijaya Krishna Nivarthi <quic_vnivarth@quicinc.com> Link: https://lore.kernel.org/r/20230714042203.14251-3-quic_ptalari@quicinc.com Signed-off-by: Mark Brown <broonie@kernel.org>
2023-07-31spi: Use dev_err_probe instead of dev_errWang Ming
It is possible that dma_request_chan will return EPROBE_DEFER, which means that dev is not ready yet. In this case, dev_err(dev), there will be no output. This patch fixes the bug. Signed-off-by: Wang Ming <machel@vivo.com> Link: https://lore.kernel.org/r/20230726105457.3743-1-machel@vivo.com Signed-off-by: Mark Brown <broonie@kernel.org>
2023-07-30spi: Merge up fixes from Linus' treeMark Brown
Gets us pine64plus back if nothing else.
2023-07-28spi: microchip-core: Clean up redundant dev_err_probe()Chen Jiahao
Refering to platform_get_irq()'s definition, the return value has already been checked if ret < 0, and printed via dev_err_probe(). Calling dev_err_probe() one more time outside platform_get_irq() is obviously redundant. Furthermore, platform_get_irq() will never return irq equals 0, removing spi->irq == 0 checking to clean it up. Signed-off-by: Chen Jiahao <chenjiahao16@huawei.com> Reviewed-by: Conor Dooley <conor.dooley@microchip.com> Link: https://lore.kernel.org/r/20230728075729.3451867-1-chenjiahao16@huawei.com Signed-off-by: Mark Brown <broonie@kernel.org>
2023-07-27spi: s3c64xx: Clean up redundant dev_err_probe()Chen Jiahao
Referring to platform_get_irq()'s definition, the return value has already been checked if ret < 0, and printed via dev_err_probe(). Calling dev_err_probe() one more time outside platform_get_irq() is obviously redundant. Removing dev_err_probe() outside platform_get_irq() to clean up above problem. Signed-off-by: Chen Jiahao <chenjiahao16@huawei.com> Reviewed-by: Andi Shyti <andi.shyti@kernel.org> Link: https://lore.kernel.org/r/20230727131635.2898051-1-chenjiahao16@huawei.com Signed-off-by: Mark Brown <broonie@kernel.org>
2023-07-27spi: stm32: Remove redundant dev_err_probe()Ruan Jinjie
There is no need to call the dev_err_probe() function directly to print a custom message when handling an error from platform_get_irq() function as it is going to display an appropriate error message in case of a failure. Signed-off-by: Ruan Jinjie <ruanjinjie@huawei.com> Link: https://lore.kernel.org/r/20230727110558.2904084-1-ruanjinjie@huawei.com Signed-off-by: Mark Brown <broonie@kernel.org>
2023-07-26spi: tegra20-sflash: fix to check return value of platform_get_irq() in ↵Zhang Shurong
tegra_sflash_probe() The platform_get_irq might be failed and return a negative result. So there should have an error handling code. Fixed this by adding an error handling code. Fixes: 8528547bcc33 ("spi: tegra: add spi driver for sflash controller") Signed-off-by: Zhang Shurong <zhang_shurong@foxmail.com> Link: https://lore.kernel.org/r/tencent_71FC162D589E4788C2152AAC84CD8D5C6D06@qq.com Signed-off-by: Mark Brown <broonie@kernel.org>
2023-07-26spi: spi-qcom-qspi: Add mem_ops to avoid PIO for badly sized readsDouglas Anderson
In the patch ("spi: spi-qcom-qspi: Fallback to PIO for xfers that aren't multiples of 4 bytes") we detect reads that we can't handle properly and fallback to PIO mode. While that's correct behavior, we can do better by adding "spi_controller_mem_ops" for our controller. Once we do this then the caller will give us a transfer that's a multiple of 4-bytes so we can DMA. Fixes: b5762d95607e ("spi: spi-qcom-qspi: Add DMA mode support") Signed-off-by: Douglas Anderson <dianders@chromium.org> Reviewed-by: Vijaya Krishna Nivarthi <quic_vnivarth@quicinc.com> Link: https://lore.kernel.org/r/20230725110226.2.Id4a39804e01e4a06dae9b73fd2a5194c4c7ea453@changeid Signed-off-by: Mark Brown <broonie@kernel.org>
2023-07-26spi: spi-qcom-qspi: Fallback to PIO for xfers that aren't multiples of 4 bytesDouglas Anderson
The Qualcomm QSPI driver appears to require that any reads using DMA are a mutliple of 4 bytes. If this isn't true then the controller will clobber any extra bytes in memory following the last word. Let's detect this and falback to PIO. This fixes problems reported by slub_debug=FZPUA, which would complain about "kmalloc Redzone overwritten". One such instance said: 0xffffff80c29d541a-0xffffff80c29d541b @offset=21530. First byte 0x0 instead of 0xcc Allocated in mtd_kmalloc_up_to+0x98/0xac age=36 cpu=3 pid=6658 Tracing through what was happening I saw that, while we often did DMA tranfers of 0x1000 bytes, sometimes we'd end up doing ones of 0x41a bytes. Those 0x41a byte transfers were the problem. NOTE: a future change will enable the SPI "mem ops" to help avoid this case, but it still seems good to add the extra check in the transfer. Fixes: b5762d95607e ("spi: spi-qcom-qspi: Add DMA mode support") Signed-off-by: Douglas Anderson <dianders@chromium.org> Reviewed-by: Vijaya Krishna Nivarthi <quic_vnivarth@quicinc.com> Reviewed-by: Bjorn Andersson <andersson@kernel.org> Link: https://lore.kernel.org/r/20230725110226.1.Ia2f980fc7cd0b831e633391f0bb1272914d8f381@changeid Signed-off-by: Mark Brown <broonie@kernel.org>
2023-07-25spi: spi-qcom-qspi: Add DMA_CHAIN_DONE to ALL_IRQSVijaya Krishna Nivarthi
Add latest added DMA_CHAIN_DONE irq to QSPI_ALL_IRQS that encompasses all of the qspi IRQs. Signed-off-by: Vijaya Krishna Nivarthi <quic_vnivarth@quicinc.com> Reviewed-by: Douglas Anderson <dianders@chromium.org> Link: https://lore.kernel.org/r/1690285689-30233-5-git-send-email-quic_vnivarth@quicinc.com Signed-off-by: Mark Brown <broonie@kernel.org>
2023-07-25spi: spi-qcom-qspi: Call dma_wmb() after setting up descriptorsVijaya Krishna Nivarthi
After setting up dma descriptors and before initiaiting dma transfer, call dma_wmb() to ensure all writes go through. This doesn't fix any reported problem but is added for safety. Signed-off-by: Vijaya Krishna Nivarthi <quic_vnivarth@quicinc.com> Fixes: b5762d95607e ("spi: spi-qcom-qspi: Add DMA mode support") Reviewed-by: Douglas Anderson <dianders@chromium.org> Link: https://lore.kernel.org/r/1690285689-30233-4-git-send-email-quic_vnivarth@quicinc.com Signed-off-by: Mark Brown <broonie@kernel.org>
2023-07-25spi: spi-qcom-qspi: Use GFP_ATOMIC flag while allocating for descriptorVijaya Krishna Nivarthi
While allocating for DMA descriptor, GFP_KERNEL flag is being used and this allocation happens within critical section with spinlock acquired. This generates a static checker warning. Use GFP_ATOMIC to prevent sleeping; and since this increases chances of allocation failure, add handling accordingly. Reported-by: Dan Carpenter <dan.carpenter@linaro.org> Closes: https://lore.kernel.org/all/abc223e8-44af-40bb-a0bd-9865b393f435@moroto.mountain/ Signed-off-by: Vijaya Krishna Nivarthi <quic_vnivarth@quicinc.com> Fixes: b5762d95607e ("spi: spi-qcom-qspi: Add DMA mode support") Reviewed-by: Douglas Anderson <dianders@chromium.org> Link: https://lore.kernel.org/r/1690285689-30233-3-git-send-email-quic_vnivarth@quicinc.com Signed-off-by: Mark Brown <broonie@kernel.org>
2023-07-25spi: spi-qcom-qspi: Ignore disabled interrupts' status in isrVijaya Krishna Nivarthi
During FIFO/DMA modes dynamic switching, only corresponding interrupts are enabled. However its possible that FIFO related interrupt status registers get set during DMA mode. For example WR_FIFO_EMPTY bit is set during DMA TX. Ignore such status bits so that they don't trip unwanted operations. Suggested-by: Douglas Anderson <dianders@chromium.org> Signed-off-by: Vijaya Krishna Nivarthi <quic_vnivarth@quicinc.com> Fixes: b5762d95607e ("spi: spi-qcom-qspi: Add DMA mode support") Reviewed-by: Douglas Anderson <dianders@chromium.org> Tested-by: Douglas Anderson <dianders@chromium.org> Link: https://lore.kernel.org/r/1690285689-30233-2-git-send-email-quic_vnivarth@quicinc.com Signed-off-by: Mark Brown <broonie@kernel.org>
2023-07-25spi: fsl: Remove unused extern declarationsYueHaibing
commit b36ece832512 ("spi/mpc8xxx: refactor the common code for SPI/eSPI controller") left mpc8xxx_spi_bufs() behind. And since commit 3c5395b66ff6 ("spi: fsl-(e)spi: simplify cleanup code") mpc8xxx_spi_remove() is not used anymore. Signed-off-by: YueHaibing <yuehaibing@huawei.com> Link: https://lore.kernel.org/r/20230725135411.21152-1-yuehaibing@huawei.com Signed-off-by: Mark Brown <broonie@kernel.org>
2023-07-25spi: fsl-dspi: Use dev_err_probe() in dspi_request_dma()Minjie Du
It is possible for dma_request_chan() to return EPROBE_DEFER, which means dev is not ready yet. At this point dev_err() will have no output. Signed-off-by: Minjie Du <duminjie@vivo.com> Link: https://lore.kernel.org/r/20230725035038.1702-1-duminjie@vivo.com Signed-off-by: Mark Brown <broonie@kernel.org>
2023-07-23spi: Merge up fixes from mainlineMark Brown
There's several things here that will really help my CI.
2023-07-20spi: use devm_clk_get_enabled() in mcfqspi_probe()Yuanjun Gong
in mcfqspi_probe(), the return value of function clk_prepare_enable() should be checked, since it may fail. using devm_clk_get_enabled() instead of devm_clk_get() and clk_prepare_enable() can avoid this problem. Signed-off-by: Yuanjun Gong <ruc_gongyuanjun@163.com> Link: https://lore.kernel.org/r/20230720140909.34084-1-ruc_gongyuanjun@163.com Signed-off-by: Mark Brown <broonie@kernel.org>
2023-07-20spi: fix return value check in bcm2835_spi_probe()Yuanjun Gong
in bcm2835_spi_probe(), clk_prepare_enable() may fail, therefore, the return value of clk_prepare_enable() should be checked, and the function should return error if clk_prepare_enable() fails. Signed-off-by: Yuanjun Gong <ruc_gongyuanjun@163.com> Link: https://lore.kernel.org/r/20230720140859.33883-1-ruc_gongyuanjun@163.com Signed-off-by: Mark Brown <broonie@kernel.org>
2023-07-19spi: rzv2m-csi: Make use of device_set_nodeFabrizio Castro
Use device_set_node instead of assigning controller->dev.of_node directly because it also sets the firmware node. Signed-off-by: Fabrizio Castro <fabrizio.castro.jz@renesas.com> Suggested-by: Andy Shevchenko <andy.shevchenko@gmail.com> Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com> Link: https://lore.kernel.org/r/20230718192453.543549-5-fabrizio.castro.jz@renesas.com Signed-off-by: Mark Brown <broonie@kernel.org>
2023-07-19spi: rzv2m-csi: Get rid of the x_trg{_words} tablesFabrizio Castro
Table x_trg can be replaced with ilog2(), and table x_trg_words can be replaced with rounddown_pow_of_two(). Replace the tables usage with the corresponding macros. While at it, remove a couple of unnecessary empty lines. Signed-off-by: Fabrizio Castro <fabrizio.castro.jz@renesas.com> Suggested-by: Andy Shevchenko <andy.shevchenko@gmail.com> Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com> Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be> Link: https://lore.kernel.org/r/20230718192453.543549-4-fabrizio.castro.jz@renesas.com Signed-off-by: Mark Brown <broonie@kernel.org>
2023-07-19spi: rzv2m-csi: Improve data types, casting and alignmentFabrizio Castro
"unsigned int" is more appropriate than "int" for the members of "struct rzv2m_csi_priv". Using void* rather than u8* for txbuf and rxbuf allows for the removal of some type casting. Remove the unnecessary casting of "data" to "struct rzv2m_csi_priv*" in function "rzv2m_csi_irq_handler". Also, members "bytes_per_word" and "errors" introduce gaps in the structure. Adjust "struct rzv2m_csi_priv" and its members usage accordingly. Signed-off-by: Fabrizio Castro <fabrizio.castro.jz@renesas.com> Suggested-by: Geert Uytterhoeven <geert+renesas@glider.be> Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be> Link: https://lore.kernel.org/r/20230718192453.543549-3-fabrizio.castro.jz@renesas.com Signed-off-by: Mark Brown <broonie@kernel.org>
2023-07-19spi: rzv2m-csi: Squash timing settings into one statementFabrizio Castro
Register CLKSEL hosts the configuration for both clock polarity and data phase, and both values can be set in one write operation. Squash the clock polarity and data phase register writes into one statement, for efficiency. Signed-off-by: Fabrizio Castro <fabrizio.castro.jz@renesas.com> Suggested-by: Andy Shevchenko <andy.shevchenko@gmail.com> Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com> Link: https://lore.kernel.org/r/20230718192453.543549-2-fabrizio.castro.jz@renesas.com Signed-off-by: Mark Brown <broonie@kernel.org>
2023-07-18spi: rzv2m-csi: Code refactoringMark Brown
Merge series from Fabrizio Castro <fabrizio.castro.jz@renesas.com>: This series is to follow up on Geert and Andy feedback: https://patchwork.kernel.org/project/linux-renesas-soc/patch/20230622113341.657842-4-fabrizio.castro.jz@renesas.com/
2023-07-18spi: spi-fsl-lpspi: Read chip-select amount from hardware for i.MX93Alexander Stein
PARAM.PCSNUM register on i.MX93 indicates the number of supported (hw) chip-selects. LPSPI4 has 3 while others have only 2. Still allow overwriting from DT. Signed-off-by: Alexander Stein <alexander.stein@ew.tq-group.com> Link: https://lore.kernel.org/r/20230717085934.409476-3-alexander.stein@ew.tq-group.com Signed-off-by: Mark Brown <broonie@kernel.org>
2023-07-18spi: spi-fsl-lpspi: Move controller initialization further downAlexander Stein
This is a preparation for reading number of chip-selects from hardware. This needs IO resources mapped and peripheral clocking enabled. No functional changes intended. Signed-off-by: Alexander Stein <alexander.stein@ew.tq-group.com> Link: https://lore.kernel.org/r/20230717085934.409476-2-alexander.stein@ew.tq-group.com Signed-off-by: Mark Brown <broonie@kernel.org>
2023-07-17spi: rzv2m-csi: Replace unnecessary ternary operatorsFabrizio Castro
The ternary operators used to initialize tx_completed and rx_completed are not necessary, replace them with a better implementation. Signed-off-by: Fabrizio Castro <fabrizio.castro.jz@renesas.com> Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be> Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com> Link: https://lore.kernel.org/r/20230715010407.1751715-6-fabrizio.castro.jz@renesas.com Signed-off-by: Mark Brown <broonie@kernel.org>
2023-07-17spi: rzv2m-csi: Leave readl_poll_timeout calls for lastFabrizio Castro
Both rzv2m_csi_sw_reset and rzv2m_csi_start_stop_operation call into readl_poll_timeout upon a certain condition, and return 0 otherwise. Flip the logic to improve readability. Signed-off-by: Fabrizio Castro <fabrizio.castro.jz@renesas.com> Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be> Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com> Link: https://lore.kernel.org/r/20230715010407.1751715-5-fabrizio.castro.jz@renesas.com Signed-off-by: Mark Brown <broonie@kernel.org>
2023-07-17spi: rzv2m-csi: Rework CSI_CKS_MAX definitionFabrizio Castro
Clock "csiclk" gets divided by 2 * CSI_CLKSEL_CKS in order to generate the serial clock (output from master), with CSI_CLKSEL_CKS ranging from 0x1 (that means "csiclk" is divided by 2) to 0x3FFF ("csiclk" is divided by 32766). CSI_CKS_MAX is used for referring to the setting corresponding to the maximum frequency divider. Value 0x3FFF for CSI_CKS_MAX doesn't really means much to the reader without an explanation and a more readable definition. Add a comment with a meaningful description and also replace value 0x3FFF with the corresponding GENMASK, to make it very clear what the macro means. Signed-off-by: Fabrizio Castro <fabrizio.castro.jz@renesas.com> Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be> Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com> Link: https://lore.kernel.org/r/20230715010407.1751715-4-fabrizio.castro.jz@renesas.com Signed-off-by: Mark Brown <broonie@kernel.org>
2023-07-17spi: rzv2m-csi: Adopt HZ_PER_MHZ for max spi clockFabrizio Castro
Make use of HZ_PER_MHZ for CSI_MAX_SPI_SCKO to make it clear what its value means. Signed-off-by: Fabrizio Castro <fabrizio.castro.jz@renesas.com> Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be> Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com> Link: https://lore.kernel.org/r/20230715010407.1751715-3-fabrizio.castro.jz@renesas.com Signed-off-by: Mark Brown <broonie@kernel.org>
generated by cgit (git 2.34.1) at 2025-09-24 14:19:18 +0000