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linux/drivers/spi
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Stefan Wahren 730bbfaf7d
spi: spi-fsl-lpspi: Fix scldiv calculation 
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>
2024-08-07 23:45:12 +01:00
..
atmel-quadspi.c spi: atmel-quadspi: Add missing check for clk_prepare 2024-05-27 01:33:39 +01:00
internals.h spi: Rework per message DMA mapped flag to be per transfer 2024-06-10 12:49:03 +01:00
Kconfig spi: add ch341a usb2spi driver 2024-07-08 17:01:10 +01:00
Makefile spi: add ch341a usb2spi driver 2024-07-08 17:01:10 +01:00
spi-airoha-snfi.c spi: airoha: add SPI-NAND Flash controller driver 2024-04-30 23:40:28 +09:00
spi-altera-core.c spi: add missing MODULE_DESCRIPTION() macros 2024-06-10 12:49:05 +01:00
spi-altera-dfl.c
spi-altera-platform.c spi: altera: Drop unneeded MODULE_ALIAS 2024-04-15 10:17:25 +09:00
spi-amd.c spi: spi_amd: Add support for SPI MEM framework 2024-03-25 20:30:06 +00:00
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: ar934x: Use helper function devm_clk_get_enabled() 2023-09-11 01:31:52 +01:00
spi-armada-3700.c spi: armada-3700: use 'time_left' variable with wait_for_completion_timeout() 2024-04-30 23:57:26 +09:00
spi-aspeed-smc.c spi: aspeed: Use helper function devm_clk_get_enabled() 2023-09-11 01:31:54 +01:00
spi-at91-usart.c spi: at91-usart: Remove some dead code 2023-09-25 16:27:48 +02:00
spi-ath79.c spi: bitbang: Follow renaming of SPI "master" to "controller" 2024-02-08 11:54:48 +00:00
spi-atmel.c spi: remove struct spi_message::is_dma_mapped 2024-03-25 20:30:07 +00:00
spi-au1550.c spi: au1550: t->{tx,rx}_dma checks 2024-03-28 21:09:45 +00:00
spi-axi-spi-engine.c spi: Updates for v6.11 2024-07-15 18:03:43 -07:00
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: bcm2835: implement ctlr->max_transfer_size 2024-02-05 14:35:44 +00:00
spi-bcm2835aux.c spi: bcm2835aux: Use helper function devm_clk_get_enabled() 2023-09-11 01:31:57 +01:00
spi-bcm-qspi.c spi: bcm-qspi: fix SFDP BFPT read by usig mspi read 2024-01-23 13:28:03 +00:00
spi-bcm-qspi.h
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: bitbang: Convert unsigned to unsigned int 2024-05-27 01:33:23 +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 parport: Remove parport_driver.devmodel 2024-07-03 16:44:22 +02:00
spi-cadence-quadspi.c spi: cadence-qspi: add mobileye,eyeq5-ospi compatible 2024-04-26 11:09:25 +09:00
spi-cadence-xspi.c spi: cadence: Ensure data lines set to low during dummy-cycle period 2024-05-29 13:43:02 +01:00
spi-cadence.c spi: spi-cadence: Enable spi refclk in slave mode 2024-06-19 13:54:17 +01:00
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: Use helper function devm_clk_get_enabled() 2023-09-11 01:31:59 +01:00
spi-cavium.c spi: cavium: Follow renaming of SPI "master" to "controller" 2024-02-08 11:54:50 +00:00
spi-cavium.h spi: cavium: Follow renaming of SPI "master" to "controller" 2024-02-08 11:54:50 +00:00
spi-ch341.c spi: add ch341a usb2spi driver 2024-07-08 17:01:10 +01:00
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: drop driver owner assignment 2024-03-28 13:58:41 +00:00
spi-cs42l43.c spi: cs42l43: Add speaker id support to the bridge configuration 2024-06-20 21:10:15 +01:00
spi-davinci.c spi: davinci: Unset POWERDOWN bit when releasing resources 2024-07-01 13:12:18 +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: differentiate between unsupported and invalid requests 2024-05-27 01:33:04 +01:00
spi-dw-core.c spi: dw: Use new spi_xfer_is_dma_mapped() helper 2024-06-10 12:48:58 +01:00
spi-dw-dma.c spi: dw: remove redundant assignment to variable len 2024-02-15 14:17:19 +00:00
spi-dw-mmio.c spi: dw: Bail out early on unsupported target mode 2024-05-09 17:48:06 +02:00
spi-dw-pci.c
spi-dw.h spi: dw: Convert dw_spi::num_cs to u32 2024-05-03 11:09:24 +09:00
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: add missing MODULE_DESCRIPTION() macros 2024-06-10 12:49:05 +01:00
spi-fsl-cpm.h spi: fsl: remove is_dma_mapped checks 2024-03-28 21:09:46 +00:00
spi-fsl-dspi.c spi: fsl-dspi: use common proptery 'spi-cs-setup(hold)-delay-ns' 2024-07-01 13:12:42 +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: add missing MODULE_DESCRIPTION() macros 2024-06-10 12:49:05 +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 2024-08-07 23:45:12 +01:00
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: remove is_dma_mapped checks 2024-03-28 21:09:46 +00:00
spi-fsl-spi.h
spi-geni-qcom.c spi: geni-qcom: Follow renaming of SPI "master" to "controller" 2024-02-08 11:54:51 +00:00
spi-gpio.c spi: gpio: Use traditional pattern when checking error codes 2024-05-27 01:33:30 +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: Add verification for the max_frequency provided by the firmware 2024-07-30 13:27:38 +01:00
spi-hisi-sfc-v3xx.c spi: hisi-sfc-v3xx: Return IRQ_NONE if no interrupts were detected 2024-01-23 15:05:18 +00:00
spi-img-spfi.c spi: img-spfi: switch to use modern name 2023-08-14 13:11:01 +01:00
spi-imx.c spi: spi-imx: Pass pm_ptr() 2024-06-25 20:04:31 +01:00
spi-ingenic.c spi: ingenic: Use new spi_xfer_is_dma_mapped() helper 2024-06-10 12:48:59 +01:00
spi-intel-pci.c spi: intel-pci: Add support for Lunar Lake-M SPI serial flash 2024-02-12 13:41:35 +00:00
spi-intel-platform.c
spi-intel.c spi: intel: Keep the BIOS partition inside the first chip 2024-02-05 14:35:47 +00:00
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-ssc: Use helper function devm_clk_get_enabled() 2023-09-11 01:32:03 +01:00
spi-ljca.c spi: ljca: switch to use devm_spi_alloc_host() 2023-12-11 12:55:16 +00:00
spi-lm70llp.c parport: Remove parport_driver.devmodel 2024-07-03 16:44:22 +02:00
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: loopback-test: drop driver owner assignment 2024-03-28 13:58:40 +00:00
spi-lp8841-rtc.c spi: lp-8841: switch to use modern name 2023-09-11 01:31:31 +01:00
spi-mem.c spi: Fix error code checking in spi_mem_exec_op() 2024-03-14 14:14:20 +00:00
spi-meson-spicc.c spi: meson-spicc: add spicc loopback mode 2024-06-12 16:19:59 +01:00
spi-meson-spifc.c spi: Use devm_clk_get_*() helper function to 2023-09-11 22:43:17 +01:00
spi-microchip-core-qspi.c spi: microchip-core-qspi: fix setting spi bus clock rate 2024-05-09 06:59:19 +02:00
spi-microchip-core.c spi: microchip-core: add support for word sizes of 1 to 32 bits 2024-07-15 19:08:20 +01:00
spi-mpc52xx-psc.c spi: mpc52xx-psc: Make mpc52xx_psc_spi_transfer_one_message() static 2023-10-06 12:34:31 +01:00
spi-mpc52xx.c spi: mpc52xx: explicitly include linux/platform_device.h 2023-12-08 20:13:24 +00:00
spi-mpc512x-psc.c spi: mpc512x-psc: switch to use modern name 2023-09-11 01:31:35 +01:00
spi-mt65xx.c spi: spi-mt65xx: Rename a variable in interrupt handler 2024-03-25 15:03:03 +00:00
spi-mt7621.c spi: mt7621: allow GPIO chip select lines 2024-03-25 15:03:02 +00:00
spi-mtk-nor.c spi: mtk-nor: switch to use modern name 2023-09-11 01:31:39 +01:00
spi-mtk-snfi.c spi: Use devm_clk_get_*() helper function to 2023-09-11 22:43:17 +01:00
spi-mux.c spi: mux: set ctlr->bits_per_word_mask 2024-07-09 17:42:33 +01:00
spi-mxic.c spi: mxic: differentiate between unsupported and invalid requests 2024-05-27 01:33:05 +01:00
spi-mxs.c spi-mxs: Fix chipselect glitch 2024-02-13 15:48:22 +00:00
spi-npcm-fiu.c spi: Unify error codes by replacing -ENOTSUPP with -EOPNOTSUPP 2023-11-30 12:12:39 +00:00
spi-npcm-pspi.c spi: npcm-pspi: switch to use modern name 2023-09-11 01:31:43 +01:00
spi-nxp-fspi.c spi: nxp-fspi: Adjust LUT debug output alignment 2024-01-22 00:06:54 +00:00
spi-oc-tiny.c spi: oc-tiny: Remove unused of_gpio.h 2024-04-17 23:01:11 +09:00
spi-omap2-mcspi.c spi: Updates for v6.11 2024-07-15 18:03:43 -07:00
spi-omap-uwire.c spi: add missing MODULE_DESCRIPTION() macros 2024-06-10 12:49:05 +01:00
spi-orion.c spi: orion: Use helper function devm_clk_get_enabled() 2023-09-11 01:32:09 +01:00
spi-pci1xxxx.c spi: pci1xxxx: Use new spi_xfer_is_dma_mapped() helper 2024-06-10 12:49:01 +01:00
spi-pic32-sqi.c spi: pic32-sqi: use 'time_left' variable with wait_for_completion_timeout() 2024-04-30 23:57:29 +09:00
spi-pic32.c spi: pic32: use 'time_left' variable with wait_for_completion_timeout() 2024-04-30 23:57:30 +09:00
spi-pl022.c spi: pl022: update description of internal_cs_control() 2023-12-15 12:58:18 +00:00
spi-ppc4xx.c Linux 6.8 2024-03-18 17:30:46 +00:00
spi-pxa2xx-dma.c spi: pxa2xx: Remove DMA parameters from struct chip_data 2024-05-03 11:11:36 +09:00
spi-pxa2xx-pci.c spi: pxa2xx: Convert PCI driver to use spi-pxa2xx code directly 2024-06-03 16:00:04 +01:00
spi-pxa2xx-platform.c spi: pxa2xx: Move platform driver to a separate file 2024-06-03 16:00:03 +01:00
spi-pxa2xx.c spi: pxa2xx: Use new spi_xfer_is_dma_mapped() helper 2024-06-10 12:49:01 +01:00
spi-pxa2xx.h spi: pxa2xx: Move platform driver to a separate file 2024-06-03 16:00:03 +01:00
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: Rework DMA mapped flag 2024-06-11 11:38:25 +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: spi-rockchip: Fix max_native_cs 2024-02-05 14:35:49 +00:00
spi-rpc-if.c spi: rpc-if: differentiate between unsupported and invalid requests 2024-05-27 01:33:06 +01:00
spi-rspi.c spi: rspi: Get rid of unused struct rspi_plat_data 2024-03-25 17:18:22 +00:00
spi-rzv2m-csi.c spi: rzv2m-csi: Add target mode support 2023-10-09 13:14:28 +01:00
spi-s3c64xx.c spi: spi-s3c64xx.c: Remove of_node_put for auto cleanup 2024-04-24 10:27:16 +09:00
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 2024-01-30 15:27:21 +00:00
spi-sh-sci.c spi: bitbang: Follow renaming of SPI "master" to "controller" 2024-02-08 11:54:48 +00:00
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: slave-mt27xx: Follow renaming of SPI "master" to "controller" 2024-02-08 11:54:53 +00:00
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: sprd-adi: switch to use spi_alloc_host() 2023-12-11 12:54:53 +00:00
spi-sprd.c spi: sprd: switch to use modern name 2023-12-11 12:54:53 +00:00
spi-st-ssc4.c spi: st-ssc4: switch to use modern name 2023-12-11 12:54:54 +00:00
spi-stm32-qspi.c spi: stm32: qspi: Clamp stm32_qspi_get_mode() output to CCR_BUSWIDTH_4 2024-06-18 14:48:26 +01:00
spi-stm32.c spi: stm32: Don't warn about spurious interrupts 2024-05-29 19:12:09 +01:00
spi-sun4i.c spi: sun4i: use 'time_left' variable with wait_for_completion_timeout() 2024-04-30 23:57:30 +09:00
spi-sun6i.c spi: sun6i: use 'time_left' variable with wait_for_completion_timeout() 2024-04-30 23:57:31 +09:00
spi-sunplus-sp7021.c spi: sunplus-sp7021: switch to use modern name 2023-12-11 12:54:59 +00:00
spi-synquacer.c spi: synquacer: switch to use modern name 2023-12-11 12:55:00 +00:00
spi-tegra20-sflash.c spi: tegra20-sflash: switch to use modern name 2023-12-11 12:55:03 +00:00
spi-tegra20-slink.c spi: tegra20-slink: switch to use modern name 2023-12-11 12:55:04 +00:00
spi-tegra114.c spi: tegra114: switch to use modern name 2023-12-11 12:55:02 +00:00
spi-tegra210-quad.c spi: tegra210-quad: switch to use modern name 2023-12-11 12:55:05 +00:00
spi-test.h
spi-ti-qspi.c spi: spi-ti-qspi: switch to use modern name 2023-12-11 12:55:06 +00:00
spi-tle62x0.c
spi-topcliff-pch.c spi: topcliff-pch: switch to use modern name 2023-12-11 12:55:07 +00:00
spi-uniphier.c spi: uniphier: switch to use modern name 2023-12-11 12:55:08 +00:00
spi-wpcm-fiu.c spi: wpcm-fiu: differentiate between unsupported and invalid requests 2024-05-27 01:33:06 +01:00
spi-xcomm.c spi: xcomm: fix coding style 2024-07-05 18:47:46 +01:00
spi-xilinx.c spi: bitbang: Follow renaming of SPI "master" to "controller" 2024-02-08 11:54:48 +00:00
spi-xlp.c spi: xlp: use 'time_left' variable with wait_for_completion_timeout() 2024-04-30 23:57:32 +09:00
spi-xtensa-xtfpga.c spi: bitbang: Follow renaming of SPI "master" to "controller" 2024-02-08 11:54:48 +00:00
spi-zynq-qspi.c spi: zynq-qspi: switch to use modern name 2023-12-11 12:55:13 +00:00
spi-zynqmp-gqspi.c spi: zynqmp-gqspi: switch to use modern name 2023-12-11 12:55:14 +00:00
spi.c Driver core changes for 6.11-rc1 2024-07-25 10:42:22 -07:00
spidev.c spi: spidev: Add missing spi_device_id for bh2228fv 2024-07-30 17:03:35 +01:00