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linux-rolling-lts
linux/drivers/spi
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Stefan Wahren a2c0f5df8b spi: spi-fsl-lpspi: Fix scldiv calculation 
[ Upstream commit 730bbfaf7d ]

The effective SPI clock frequency should never exceed speed_hz
otherwise this might result in undefined behavior of the SPI device.

Currently the scldiv calculation could violate this constraint.
For the example parameters perclk_rate = 24 MHz and speed_hz = 7 MHz,
the function fsl_lpspi_set_bitrate will determine perscale = 0 and
scldiv = 1, which is a effective SPI clock of 8 MHz.

So fix this by rounding up the quotient of perclk_rate and speed_hz.
While this never change within the loop, we can pull this out.

Fixes: 5314987de5 ("spi: imx: add lpspi bus driver")
Signed-off-by: Stefan Wahren <wahrenst@gmx.net>
Link: https://patch.msgid.link/20240804113611.83613-1-wahrenst@gmx.net
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2024-08-14 13:58:52 +02:00
..
atmel-quadspi.c
spi: atmel-quadspi: Add missing check for clk_prepare
2024-08-03 08:53:19 +02:00
internals.h
…
Kconfig
spi: spi-zynqmp-gqspi: fix driver kconfig dependencies
2024-01-25 15:35:14 -08:00
Makefile
Add cs42l43 PC focused SoundWire CODEC
2023-08-18 22:46:19 +01:00
spi-altera-core.c
spi: Replace all spi->chip_select and spi->cs_gpiod references with function call
2023-03-11 12:34:01 +00:00
spi-altera-dfl.c
spi: spi-altera-dfl: switch to use modern name
2022-12-29 13:22:04 +00:00
spi-altera-platform.c
spi: spi-altera-platform: switch to use modern name
2022-12-29 13:22:05 +00:00
spi-amd.c
spi: amd: fix Wvoid-pointer-to-enum-cast warning
2023-08-14 13:11:15 +01:00
spi-amlogic-spifc-a1.c
spi: amlogic-spifc-a1: switch to use devm_spi_alloc_host()
2023-08-14 13:10:48 +01:00
spi-ar934x.c
spi: Explicitly include correct DT includes
2023-07-14 20:53:00 +01:00
spi-armada-3700.c
spi: Explicitly include correct DT includes
2023-07-14 20:53:00 +01:00
spi-aspeed-smc.c
spi: aspeed: switch to use modern name
2023-08-07 14:38:18 +01:00
spi-at91-usart.c
spi: at91-usart: Use PTR_ERR_OR_ZERO() to simplify code
2023-08-22 13:51:35 +01:00
spi-ath79.c
spi: Rename SPI_MASTER_GPIO_SS to SPI_CONTROLLER_GPIO_SS
2023-07-11 14:12:56 +01:00
spi-atmel.c
spi: atmel: Fix clock issue when using devices with different polarities
2024-01-01 12:42:44 +00:00
spi-au1550.c
spi: au1550: switch to use modern name
2023-08-14 13:10:49 +01:00
spi-axi-spi-engine.c
spi: axi-spi-engine: fix version format string
2024-05-17 12:02:01 +02:00
spi-bcm63xx-hsspi.c
spi: bcm63xx-hsspi: switch to use modern name
2023-08-07 14:38:23 +01:00
spi-bcm63xx.c
spi: bcm63xx: switch to use modern name
2023-08-07 14:38:24 +01:00
spi-bcm2835.c
spi: switch to use modern name
2023-08-07 21:59:25 +01:00
spi-bcm2835aux.c
spi: switch to use modern name
2023-08-07 21:59:25 +01:00
spi-bcm-qspi.c
spi: bcm-qspi: fix SFDP BFPT read by usig mspi read
2024-01-31 16:19:13 -08:00
spi-bcm-qspi.h
spi: bcm-qspi: Make bcm_qspi_remove() return void
2022-10-18 19:16:53 +01:00
spi-bcmbca-hsspi.c
spi: bcmbca-hsspi: switch to use modern name
2023-08-14 13:10:59 +01:00
spi-bitbang-txrx.h
spi: Get rid of old SPI_MASTER_NO_TX & SPI_MASTER_NO_RX
2023-07-11 13:41:20 +01:00
spi-bitbang.c
spi: Rename SPI_MASTER_GPIO_SS to SPI_CONTROLLER_GPIO_SS
2023-07-11 14:12:56 +01:00
spi-brcmstb-qspi.c
spi: brcmstb-qspi: Convert to platform remove callback returning void
2023-03-06 12:31:15 +00:00
spi-butterfly.c
spi: butterfly: switch to use modern name
2023-08-07 14:38:25 +01:00
spi-cadence-quadspi.c
spi: cadence-qspi: fix pointer reference in runtime PM hooks
2024-03-06 14:48:34 +00:00
spi-cadence-xspi.c
spi: cadence: Ensure data lines set to low during dummy-cycle period
2024-07-11 12:49:21 +02:00
spi-cadence.c
spi: spi-cadence: Reverse the order of interleaved write and read operations
2024-01-31 16:19:13 -08:00
spi-cavium-octeon.c
spi: octeon: switch to use modern name
2023-08-07 14:38:29 +01:00
spi-cavium-thunderx.c
spi: spi-cavium-thunderx: switch to use modern name
2023-08-07 14:38:30 +01:00
spi-cavium.c
spi: Replace all spi->chip_select and spi->cs_gpiod references with function call
2023-03-11 12:34:01 +00:00
spi-cavium.h
…
spi-clps711x.c
spi: clps711x: switch to use modern name
2023-08-07 14:38:28 +01:00
spi-coldfire-qspi.c
spi: coldfire-qspi: Remove an erroneous clk_disable_unprepare() from the remove function
2024-01-25 15:35:55 -08:00
spi-cs42l43.c
spi: cs42l43: Correct SPI root clock speed
2024-06-27 13:49:08 +02:00
spi-davinci.c
spi: davinci: switch to use modern name
2023-08-07 14:38:31 +01:00
spi-dln2.c
spi: dln2: switch to use modern name
2023-08-07 14:38:32 +01:00
spi-dw-bt1.c
spi: dw-bt1: Convert to platform remove callback returning void
2023-03-06 12:31:21 +00:00
spi-dw-core.c
spi: dw: switch to use modern name
2023-08-07 14:38:33 +01:00
spi-dw-dma.c
spi: dw: switch to use modern name
2023-08-07 14:38:33 +01:00
spi-dw-mmio.c
spi: dw-mmio: keep old name same as documentation
2023-08-16 12:58:07 +01:00
spi-dw-pci.c
…
spi-dw.h
spi: dw: switch to use modern name
2023-08-07 14:38:33 +01:00
spi-ep93xx.c
spi: ep93xx: switch to use modern name
2023-08-14 13:10:50 +01:00
spi-falcon.c
spi: falcon: switch to use modern name
2023-08-14 13:10:51 +01:00
spi-fsi.c
spi: fsi: switch to use spi_alloc_host()
2023-08-14 13:10:52 +01:00
spi-fsl-cpm.c
spi: fsl-cpm: Properly define and use IO pointers
2023-08-09 12:52:49 +01:00
spi-fsl-cpm.h
…
spi-fsl-dspi.c
spi: fsl-dspi: switch to use modern name
2023-08-14 13:10:53 +01:00
spi-fsl-espi.c
spi: fsl-espi: switch to use modern name
2023-08-14 13:10:54 +01:00
spi-fsl-lib.c
spi: Explicitly include correct DT includes
2023-07-14 20:53:00 +01:00
spi-fsl-lib.h
spi: fsl: Remove unused extern declarations
2023-07-25 17:40:28 +01:00
spi-fsl-lpspi.c
spi: spi-fsl-lpspi: Fix scldiv calculation
2024-08-14 13:58:52 +02:00
spi-fsl-qspi.c
spi: fsl-qspi: switch to use modern name
2023-08-14 13:10:55 +01:00
spi-fsl-spi.c
spi: fsl-spi: switch to use modern name
2023-08-14 13:10:56 +01:00
spi-fsl-spi.h
…
spi-geni-qcom.c
spi: spi-geni-qcom: Add SPI Device mode support for GENI based QuPv3
2023-07-31 15:57:04 +01:00
spi-gpio.c
spi: gpio: switch to use modern name
2023-08-14 13:10:57 +01:00
spi-gxp.c
spi: spi-gxp: BUG: Correct spi write return value
2023-09-27 17:06:36 +02:00
spi-hisi-kunpeng.c
spi: hisi-kunpeng: Delete the dump interface of data registers in debugfs
2024-05-17 12:02:01 +02:00
spi-hisi-sfc-v3xx.c
spi: hisi-sfc-v3xx: Return IRQ_NONE if no interrupts were detected
2024-03-01 13:34:49 +01:00
spi-img-spfi.c
spi: img-spfi: switch to use modern name
2023-08-14 13:11:01 +01:00
spi-imx.c
spi: imx: Don't expect DMA for i.MX{25,35,50,51,53} cspi devices
2024-07-25 09:50:55 +02:00
spi-ingenic.c
spi: ingenic: switch to use devm_spi_alloc_host()
2023-08-14 13:11:03 +01:00
spi-intel-pci.c
spi: intel-pci: Add support for Lunar Lake-M SPI serial flash
2024-03-26 18:19:10 -04:00
spi-intel-platform.c
…
spi-intel.c
spi: intel: switch to use modern name
2023-08-14 13:11:04 +01:00
spi-intel.h
…
spi-iproc-qspi.c
spi: bcm-qspi: Simplify logic by using devm_platform_ioremap_resource_byname()
2023-08-21 13:10:56 +01:00
spi-jcore.c
spi: jcore: switch to use modern name
2023-08-14 13:11:05 +01:00
spi-lantiq-ssc.c
spi: lantiq: switch to use modern name
2023-08-14 13:11:06 +01:00
spi-lm70llp.c
…
spi-loongson-core.c
spi: loongson: add bus driver for the loongson spi controller
2023-07-31 15:57:09 +01:00
spi-loongson-pci.c
spi: loongson: add bus driver for the loongson spi controller
2023-07-31 15:57:09 +01:00
spi-loongson-plat.c
spi: loongson: add bus driver for the loongson spi controller
2023-07-31 15:57:09 +01:00
spi-loongson.h
spi: loongson: add bus driver for the loongson spi controller
2023-07-31 15:57:09 +01:00
spi-loopback-test.c
spi: Explicitly include correct DT includes
2023-07-14 20:53:00 +01:00
spi-lp8841-rtc.c
spi: Explicitly include correct DT includes
2023-07-14 20:53:00 +01:00
spi-mem.c
spi: Replace all spi->chip_select and spi->cs_gpiod references with function call
2023-03-11 12:34:01 +00:00
spi-meson-spicc.c
spi: Explicitly include correct DT includes
2023-07-14 20:53:00 +01:00
spi-meson-spifc.c
spi: meson-spifc: Convert to platform remove callback returning void
2023-03-06 12:31:33 +00:00
spi-microchip-core-qspi.c
spi: microchip-core-qspi: fix setting spi bus clock rate
2024-05-17 12:02:36 +02:00
spi-microchip-core.c
spi: microchip-core: ensure TX and RX FIFOs are empty at start of a transfer
2024-08-03 08:54:40 +02:00
spi-mpc52xx-psc.c
spi: spi-mpc52xx-psc: Fix an unsigned comparison that can never be negative
2023-08-07 18:37:54 +01:00
spi-mpc52xx.c
spi: Replace all spi->chip_select and spi->cs_gpiod references with function call
2023-03-11 12:34:01 +00:00
spi-mpc512x-psc.c
spi: mpc5xxx-psc: Fix unsigned expression compared with zero
2023-08-03 17:07:09 +01:00
spi-mt65xx.c
spi: spi-mt65xx: Fix NULL pointer access in interrupt handler
2024-03-26 18:20:13 -04:00
spi-mt7621.c
spi: Explicitly include correct DT includes
2023-07-14 20:53:00 +01:00
spi-mtk-nor.c
spi: Explicitly include correct DT includes
2023-07-14 20:53:00 +01:00
spi-mtk-snfi.c
spi: Explicitly include correct DT includes
2023-07-14 20:53:00 +01:00
spi-mux.c
spi: mux: set ctlr->bits_per_word_mask
2024-07-25 09:50:56 +02:00
spi-mxic.c
spi: Replace all spi->chip_select and spi->cs_gpiod references with function call
2023-03-11 12:34:01 +00:00
spi-mxs.c
spi: Convert to SPI_CONTROLLER_HALF_DUPLEX
2023-07-11 14:14:31 +01:00
spi-npcm-fiu.c
spi: npcm-fiu: Fix UMA reads when dummy.nbytes == 0
2023-10-02 15:03:19 +01:00
spi-npcm-pspi.c
spi: npcm-pspi: Convert to platform remove callback returning void
2023-03-06 21:17:50 +00:00
spi-nxp-fspi.c
spi: nxp-fspi: use the correct ioremap function
2023-11-20 11:59:05 +01:00
spi-oc-tiny.c
spi: oc-tiny: Convert to platform remove callback returning void
2023-03-06 21:17:51 +00:00
spi-omap2-mcspi.c
spi: omap2-mcspi: Fix hardcoded reference clock
2023-11-20 11:59:08 +01:00
spi-omap-uwire.c
spi: Convert to SPI_CONTROLLER_HALF_DUPLEX
2023-07-11 14:14:31 +01:00
spi-orion.c
spi: orion: switch to use modern name
2023-08-21 14:29:18 +01:00
spi-pci1xxxx.c
spi: mchp-pci1xxx: Fix a possible null pointer dereference in pci1xxx_spi_probe
2024-04-10 16:36:01 +02:00
spi-pic32-sqi.c
spi: pic32-sqi: switch to use modern name
2023-08-21 14:29:20 +01:00
spi-pic32.c
spi: pic32: switch to use modern name
2023-08-21 14:29:21 +01:00
spi-pl022.c
spi: spl022: switch to use modern name
2023-08-21 14:29:22 +01:00
spi-ppc4xx.c
spi: ppc4xx: Drop write-only variable
2024-02-23 09:24:52 +01:00
spi-pxa2xx-dma.c
…
spi-pxa2xx-pci.c
…
spi-pxa2xx.c
spi: pxa2xx: switch to use modern name
2023-08-21 14:29:24 +01:00
spi-pxa2xx.h
…
spi-qcom-qspi.c
spi: spi-qcom-qspi: switch to use modern name
2023-08-21 14:29:25 +01:00
spi-qup.c
spi: qup: switch to use modern name
2023-08-21 14:29:26 +01:00
spi-rb4xx.c
spi: rb4xx: switch to use modern name
2023-08-21 14:29:27 +01:00
spi-realtek-rtl.c
spi: realtek-rtl: switch to use devm_spi_alloc_host()
2023-08-21 14:29:28 +01:00
spi-rockchip-sfc.c
spi: rockchip-sfc: switch to use modern name
2023-08-21 14:29:29 +01:00
spi-rockchip.c
spi: rockchip: switch to use modern name
2023-08-21 14:29:30 +01:00
spi-rpc-if.c
spi: rpc-if: switch to use devm_spi_alloc_host()
2023-08-16 12:58:08 +01:00
spi-rspi.c
spi: rspi: switch to use spi_alloc_host()
2023-08-21 14:29:30 +01:00
spi-rzv2m-csi.c
spi: rzv2m-csi: switch to use devm_spi_alloc_host()
2023-08-21 14:29:31 +01:00
spi-s3c64xx.c
spi: s3c64xx: Use DMA mode from fifo size
2024-04-10 16:36:00 +02:00
spi-sc18is602.c
spi: sc18is602: switch to use modern name
2023-08-21 14:29:33 +01:00
spi-sh-hspi.c
spi: sh-hspi: switch to use modern name
2023-08-21 14:29:34 +01:00
spi-sh-msiof.c
spi: sh-msiof: avoid integer overflow in constants
2024-03-01 13:34:51 +01:00
spi-sh-sci.c
spi: sh-sci: switch to use modern name
2023-08-21 14:29:36 +01:00
spi-sh.c
spi: sh: switch to use modern name
2023-08-21 14:29:37 +01:00
spi-sifive.c
spi: sifive: switch to use modern name
2023-08-21 14:29:38 +01:00
spi-slave-mt27xx.c
spi: Get rid of old SPI_MASTER_MUST_TX & SPI_MASTER_MUST_RX
2023-07-11 13:41:25 +01:00
spi-slave-system-control.c
…
spi-slave-time.c
…
spi-sn-f-ospi.c
spi: spi-sn-f-ospi: switch to use modern name
2023-08-21 14:29:39 +01:00
spi-sprd-adi.c
spi: Explicitly include correct DT includes
2023-07-14 20:53:00 +01:00
spi-sprd.c
spi: Explicitly include correct DT includes
2023-07-14 20:53:00 +01:00
spi-st-ssc4.c
spi: Replace all spi->chip_select and spi->cs_gpiod references with function call
2023-03-11 12:34:01 +00:00
spi-stm32-qspi.c
spi: stm32: qspi: Clamp stm32_qspi_get_mode() output to CCR_BUSWIDTH_4
2024-06-27 13:49:14 +02:00
spi-stm32.c
spi: stm32: Don't warn about spurious interrupts
2024-06-12 11:12:59 +02:00
spi-sun4i.c
spi: Replace all spi->chip_select and spi->cs_gpiod references with function call
2023-03-11 12:34:01 +00:00
spi-sun6i.c
Merge tag 'spi-fix-v6.6-merge-window' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi
2023-09-07 15:49:20 -07:00
spi-sunplus-sp7021.c
spi: sunplus-sp7021: Convert to platform remove callback returning void
2023-03-06 21:18:18 +00:00
spi-synquacer.c
spi: Replace all spi->chip_select and spi->cs_gpiod references with function call
2023-03-11 12:34:01 +00:00
spi-tegra20-sflash.c
spi: tegra20-sflash: fix to check return value of platform_get_irq() in tegra_sflash_probe()
2023-07-26 16:30:19 +01:00
spi-tegra20-slink.c
spi: tegra: Fix missing IRQ check in tegra_slink_probe()
2023-11-20 11:59:04 +01:00
spi-tegra114.c
spi: tegra114: Remove unnecessary NULL-pointer checks
2023-08-15 19:55:00 +01:00
spi-tegra210-quad.c
spi: Explicitly include correct DT includes
2023-07-14 20:53:00 +01:00
spi-test.h
…
spi-ti-qspi.c
spi: Explicitly include correct DT includes
2023-07-14 20:53:00 +01:00
spi-tle62x0.c
…
spi-topcliff-pch.c
spi: Replace all spi->chip_select and spi->cs_gpiod references with function call
2023-03-11 12:34:01 +00:00
spi-uniphier.c
spi: uniphier: Convert to platform remove callback returning void
2023-03-06 21:18:24 +00:00
spi-wpcm-fiu.c
spi: Explicitly include correct DT includes
2023-07-14 20:53:00 +01:00
spi-xcomm.c
spi: Convert to SPI_CONTROLLER_HALF_DUPLEX
2023-07-11 14:14:31 +01:00
spi-xilinx.c
spi: xilinx: Use devm_platform_get_and_ioremap_resource()
2023-03-28 14:49:37 +01:00
spi-xlp.c
spi: Replace all spi->chip_select and spi->cs_gpiod references with function call
2023-03-11 12:34:01 +00:00
spi-xtensa-xtfpga.c
spi: Get rid of old SPI_MASTER_NO_TX & SPI_MASTER_NO_RX
2023-07-11 13:41:20 +01:00
spi-zynq-qspi.c
spi: spi-zynq: Do not check for 0 return after calling platform_get_irq()
2023-08-07 14:38:39 +01:00
spi-zynqmp-gqspi.c
spi: Merge up old fix
2023-09-19 13:17:52 +01:00
spi.c
spi: Fix OCTAL mode support
2024-07-25 09:50:47 +02:00
spidev.c
spi: spidev: Add missing spi_device_id for bh2228fv
2024-08-14 13:58:51 +02:00