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2024-09-17Merge tag 'spi-v6.12' of ↵Linus Torvalds1-21/+36
git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi Pull spi updates from Mark Brown: "This is quite a quiet release for SPI. The one new core feature here is support for configuring the state of the MOSI pin when the bus is idle, there are some devices which are very fragile in this regard even when the chip select signal is not asserted. Otherwise we have some new driver support, a bunch of small fixes and some general cleanup work. - Support for configuring the state of the MOSI pin when the the bus is idle - Add the Elgin JG0309-01 in spidev - Support for Marvell xSPI, Mediatek MTK7981, Microchip PIC64GX, NXP i.MX8ULP, and Rockchip RK3576 controllers I also accidentally pulled in an IIO DT bindings update due to a typo when applying the MOSI idle state patches" * tag 'spi-v6.12' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi: (65 commits) spi: geni-qcom: Use devm functions to simplify code spi: remove spi_controller_is_slave() and spi_slave_abort() platform/olpc: olpc-xo175-ec: switch to use spi_target_abort(). spi: slave-mt27xx: switch to use target_abort spi: spidev: switch to use spi_target_abort() spi: slave-system-control: switch to use spi_target_abort() spi: slave-time: switch to use spi_target_abort() spi: switch to use spi_controller_is_target() spi: fspi: add support for imx8ulp spi: fspi: involve lut_num for struct nxp_fspi_devtype_data dt-bindings: spi: nxp-fspi: add imx8ulp support spi: spidev_fdx: Fix the wrong format specifier spi: mxs: Switch to RUNTIME/SYSTEM_SLEEP_PM_OPS() spi: dt-bindings: Add rockchip,rk3576-spi compatible spi: Revert "spi: Insert the missing pci_dev_put()before return" spi: zynq-qspi: Replace kzalloc with kmalloc for buffer allocation spi: ppc4xx: Sort headers spi: ppc4xx: Revert "handle irq_of_parse_and_map() errors" spi: zynqmp-gqspi: Simplify with dev_err_probe() spi: zynqmp-gqspi: Use devm_spi_alloc_host() ...
2024-09-11spi: nxp-fspi: fix the KASAN report out-of-bounds bugHan Xu1-2/+3
Change the memcpy length to fix the out-of-bounds issue when writing the data that is not 4 byte aligned to TX FIFO. To reproduce the issue, write 3 bytes data to NOR chip. dd if=3b of=/dev/mtd0 [ 36.926103] ================================================================== [ 36.933409] BUG: KASAN: slab-out-of-bounds in nxp_fspi_exec_op+0x26ec/0x2838 [ 36.940514] Read of size 4 at addr ffff00081037c2a0 by task dd/455 [ 36.946721] [ 36.948235] CPU: 3 UID: 0 PID: 455 Comm: dd Not tainted 6.11.0-rc5-gc7b0e37c8434 #1070 [ 36.956185] Hardware name: Freescale i.MX8QM MEK (DT) [ 36.961260] Call trace: [ 36.963723] dump_backtrace+0x90/0xe8 [ 36.967414] show_stack+0x18/0x24 [ 36.970749] dump_stack_lvl+0x78/0x90 [ 36.974451] print_report+0x114/0x5cc [ 36.978151] kasan_report+0xa4/0xf0 [ 36.981670] __asan_report_load_n_noabort+0x1c/0x28 [ 36.986587] nxp_fspi_exec_op+0x26ec/0x2838 [ 36.990800] spi_mem_exec_op+0x8ec/0xd30 [ 36.994762] spi_mem_no_dirmap_read+0x190/0x1e0 [ 36.999323] spi_mem_dirmap_write+0x238/0x32c [ 37.003710] spi_nor_write_data+0x220/0x374 [ 37.007932] spi_nor_write+0x110/0x2e8 [ 37.011711] mtd_write_oob_std+0x154/0x1f0 [ 37.015838] mtd_write_oob+0x104/0x1d0 [ 37.019617] mtd_write+0xb8/0x12c [ 37.022953] mtdchar_write+0x224/0x47c [ 37.026732] vfs_write+0x1e4/0x8c8 [ 37.030163] ksys_write+0xec/0x1d0 [ 37.033586] __arm64_sys_write+0x6c/0x9c [ 37.037539] invoke_syscall+0x6c/0x258 [ 37.041327] el0_svc_common.constprop.0+0x160/0x22c [ 37.046244] do_el0_svc+0x44/0x5c [ 37.049589] el0_svc+0x38/0x78 [ 37.052681] el0t_64_sync_handler+0x13c/0x158 [ 37.057077] el0t_64_sync+0x190/0x194 [ 37.060775] [ 37.062274] Allocated by task 455: [ 37.065701] kasan_save_stack+0x2c/0x54 [ 37.069570] kasan_save_track+0x20/0x3c [ 37.073438] kasan_save_alloc_info+0x40/0x54 [ 37.077736] __kasan_kmalloc+0xa0/0xb8 [ 37.081515] __kmalloc_noprof+0x158/0x2f8 [ 37.085563] mtd_kmalloc_up_to+0x120/0x154 [ 37.089690] mtdchar_write+0x130/0x47c [ 37.093469] vfs_write+0x1e4/0x8c8 [ 37.096901] ksys_write+0xec/0x1d0 [ 37.100332] __arm64_sys_write+0x6c/0x9c [ 37.104287] invoke_syscall+0x6c/0x258 [ 37.108064] el0_svc_common.constprop.0+0x160/0x22c [ 37.112972] do_el0_svc+0x44/0x5c [ 37.116319] el0_svc+0x38/0x78 [ 37.119401] el0t_64_sync_handler+0x13c/0x158 [ 37.123788] el0t_64_sync+0x190/0x194 [ 37.127474] [ 37.128977] The buggy address belongs to the object at ffff00081037c2a0 [ 37.128977] which belongs to the cache kmalloc-8 of size 8 [ 37.141177] The buggy address is located 0 bytes inside of [ 37.141177] allocated 3-byte region [ffff00081037c2a0, ffff00081037c2a3) [ 37.153465] [ 37.154971] The buggy address belongs to the physical page: [ 37.160559] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x89037c [ 37.168596] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 37.175149] page_type: 0xfdffffff(slab) [ 37.179021] raw: 0bfffe0000000000 ffff000800002500 dead000000000122 0000000000000000 [ 37.186788] raw: 0000000000000000 0000000080800080 00000001fdffffff 0000000000000000 [ 37.194553] page dumped because: kasan: bad access detected [ 37.200144] [ 37.201647] Memory state around the buggy address: [ 37.206460] ffff00081037c180: fa fc fc fc fa fc fc fc fa fc fc fc fa fc fc fc [ 37.213701] ffff00081037c200: fa fc fc fc 05 fc fc fc 03 fc fc fc 02 fc fc fc [ 37.220946] >ffff00081037c280: 06 fc fc fc 03 fc fc fc fc fc fc fc fc fc fc fc [ 37.228186] ^ [ 37.232473] ffff00081037c300: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 37.239718] ffff00081037c380: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 37.246962] ================================================================== [ 37.254394] Disabling lock debugging due to kernel taint 0+1 records in 0+1 records out 3 bytes copied, 0.335911 s, 0.0 kB/s Fixes: a5356aef6a90 ("spi: spi-mem: Add driver for NXP FlexSPI controller") Cc: [email protected] Signed-off-by: Han Xu <[email protected]> Link: https://patch.msgid.link/[email protected] Signed-off-by: Mark Brown <[email protected]>
2024-09-05spi: fspi: add support for imx8ulpHaibo Chen1-0/+10
The flexspi on imx8ulp only has 16 LUTs, different with others which have up to 32 LUTs. Add a separate compatible string and nxp_fspi_devtype_data to support flexspi on imx8ulp. Fixes: ef89fd56bdfc ("arm64: dts: imx8ulp: add flexspi node") Cc: [email protected] Signed-off-by: Haibo Chen <[email protected]> Reviewed-by: Frank Li <[email protected]> Link: https://patch.msgid.link/[email protected] Signed-off-by: Mark Brown <[email protected]>
2024-09-05spi: fspi: involve lut_num for struct nxp_fspi_devtype_dataHaibo Chen1-19/+25
The flexspi on different SoCs may have different number of LUTs. So involve lut_num in nxp_fspi_devtype_data to make distinguish. This patch prepare for the adding of imx8ulp. Fixes: ef89fd56bdfc ("arm64: dts: imx8ulp: add flexspi node") Cc: [email protected] Signed-off-by: Haibo Chen <[email protected]> Reviewed-by: Frank Li <[email protected]> Link: https://patch.msgid.link/[email protected] Signed-off-by: Mark Brown <[email protected]>
2024-08-29spi: nxp-fspi: Use max macroYan Zhen1-2/+1
When the original file is guaranteed to contain the minmax.h header file and compile correctly, using the real macro is usually more intuitive and readable. Signed-off-by: Yan Zhen <[email protected]> Link: https://patch.msgid.link/[email protected] Signed-off-by: Mark Brown <[email protected]>
2024-01-22spi: nxp-fspi: Adjust LUT debug output alignmentAlexander Stein1-1/+1
Ensure the command value and LUT entry values have a fixed width. This way consecutive output lines can be read much easier. Signed-off-by: Alexander Stein <[email protected]> Link: https://msgid.link/r/[email protected] Signed-off-by: Mark Brown <[email protected]>
2023-10-30spi: Merge up fixMark Brown1-1/+8
One small fix that didn't seem worth sending before the merge window.
2023-10-16spi: nxp-fspi: use the correct ioremap functionHan Xu1-1/+1
AHB memory as MMIO should be mapped with ioremap rather than ioremap_wc, which should have been used initially just to handle unaligned access as a workaround. Fixes: d166a73503ef ("spi: fspi: dynamically alloc AHB memory") Signed-off-by: Han Xu <[email protected]> Link: https://lore.kernel.org/r/[email protected] Signed-off-by: Mark Brown <[email protected]>
2023-09-11spi: nxp-fspi: switch to use modern nameYang Yingliang1-15/+15
Change legacy name master/slave to modern name host/target or controller. No functional changed. Signed-off-by: Yang Yingliang <[email protected]> Link: https://lore.kernel.org/r/[email protected] Signed-off-by: Mark Brown <[email protected]>
2023-09-11spi: nxp-fspi: reset the FLSHxCR1 registersHan Xu1-0/+7
Reset the FLSHxCR1 registers to default value. ROM may set the register value and it affects the SPI NAND normal functions. Signed-off-by: Han Xu <[email protected]> Link: https://lore.kernel.org/r/[email protected] Signed-off-by: Mark Brown <[email protected]>
2023-07-14spi: Explicitly include correct DT includesRob Herring1-1/+0
The DT of_device.h and of_platform.h date back to the separate of_platform_bus_type before it as merged into the regular platform bus. As part of that merge prepping Arm DT support 13 years ago, they "temporarily" include each other. They also include platform_device.h and of.h. As a result, there's a pretty much random mix of those include files used throughout the tree. In order to detangle these headers and replace the implicit includes with struct declarations, users need to explicitly include the correct includes. Signed-off-by: Rob Herring <[email protected]> Link: https://lore.kernel.org/r/[email protected] Signed-off-by: Mark Brown <[email protected]>
2023-07-09spi: spi-nxp-fspi: Convert to devm_platform_ioremap_resource() and ↵Yangtao Li1-4/+2
devm_platform_ioremap_resource_byname() Use devm_platform_ioremap_resource() and devm_platform_ioremap_resource_byname() to simplify code. Signed-off-by: Yangtao Li <[email protected]> Reviewed-by: Haibo Chen <[email protected]> Link: https://lore.kernel.org/r/[email protected] Signed-off-by: Mark Brown <[email protected]>
2023-03-22spi: spi-nxp-fspi: use DLL calibration when clock rate > 100MHzHaibo Chen1-0/+52
When clock rate > 100MHz, use the DLL calibration mode, and finally add the suggested half of the current clock cycle to sample the data. Signed-off-by: Haibo Chen <[email protected]> Link: https://lore.kernel.org/r/[email protected] Signed-off-by: Mark Brown <[email protected]>
2023-03-22spi: spi-nxp-fspi: correct the comment for the DLL configHaibo Chen1-1/+5
Current DLL config is just to use the default setting, this means enable the DLL override mode, and use 1 fixed delay cell in the DLL delay chain, not means "reset" the DLL, so correct this to avoid confuse. Signed-off-by: Haibo Chen <[email protected]> Link: https://lore.kernel.org/r/[email protected] Signed-off-by: Mark Brown <[email protected]>
2023-03-11spi: Replace all spi->chip_select and spi->cs_gpiod references with function ↵Amit Kumar Mahapatra via Alsa-devel1-5/+5
call Supporting multi-cs in spi drivers would require the chip_select & cs_gpiod members of struct spi_device to be an array. But changing the type of these members to array would break the spi driver functionality. To make the transition smoother introduced four new APIs to get/set the spi->chip_select & spi->cs_gpiod and replaced all spi->chip_select and spi->cs_gpiod references with get or set API calls. While adding multi-cs support in further patches the chip_select & cs_gpiod members of the spi_device structure would be converted to arrays & the "idx" parameter of the APIs would be used as array index i.e., spi->chip_select[idx] & spi->cs_gpiod[idx] respectively. Signed-off-by: Amit Kumar Mahapatra <[email protected]> Acked-by: Heiko Stuebner <[email protected]> # Rockchip drivers Reviewed-by: Michal Simek <[email protected]> Reviewed-by: Cédric Le Goater <[email protected]> # Aspeed driver Reviewed-by: Dhruva Gole <[email protected]> # SPI Cadence QSPI Reviewed-by: Patrice Chotard <[email protected]> # spi-stm32-qspi Acked-by: William Zhang <[email protected]> # bcm63xx-hsspi driver Reviewed-by: Serge Semin <[email protected]> # DW SSI part Link: https://lore.kernel.org/r/167847070432.26.15076794204368669839@mailman-core.alsa-project.org Signed-off-by: Mark Brown <[email protected]>
2023-03-06spi: nxp-fspi: Convert to platform remove callback returning voidUwe Kleine-König1-4/+2
The .remove() callback for a platform driver returns an int which makes many driver authors wrongly assume it's possible to do error handling by returning an error code. However the value returned is (mostly) ignored and this typically results in resource leaks. To improve here there is a quest to make the remove callback return void. In the first step of this quest all drivers are converted to .remove_new() which already returns void. Trivially convert this driver from always returning zero in the remove callback to the void returning variant. Signed-off-by: Uwe Kleine-König <[email protected]> Link: https://lore.kernel.org/r/[email protected] Signed-off-by: Mark Brown <[email protected]>
2022-11-02spi: nxp-fspi: make const array ls1028a_soc_attr staticColin Ian King1-1/+1
Don't populate the const array ls1028a_soc_attr on the stack, instead make it static. Also makes the object code smaller. Signed-off-by: Colin Ian King <[email protected]> Acked-by: Han Xu <[email protected]> Link: https://lore.kernel.org/r/[email protected] Signed-off-by: Mark Brown <[email protected]>
2022-09-07spi: nxp-fspi: Do not dereference fwnode in struct deviceAndy Shevchenko1-4/+4
In order to make the underneath API easier to change in the future, prevent users from dereferencing fwnode from struct device. Instead, use the specific dev_fwnode() API for that. Signed-off-by: Andy Shevchenko <[email protected]> Link: https://lore.kernel.org/r/[email protected] Signed-off-by: Mark Brown <[email protected]>
2021-10-02spi: spi-nxp-fspi: don't depend on a specific node name erratum workaroundMichael Walle1-19/+7
In commit 7e71b85473f8 ("arm64: dts: ls1028a: fix node name for the sysclk") the sysclk node name was renamed and broke the erratum workaround because it tries to fetch a device tree node by its name, which is very fragile in general. We don't even need the sysclk node because the only possible sysclk frequency input is 100MHz. In fact, the erratum says it applies if SYS_PLL_RAT is 3, not that the platform clock is 300 MHz. Make the workaround more reliable and just drop the unneeded sysclk lookup. For reference, the error during the bootup is the following: [ 4.898400] nxp-fspi 20c0000.spi: Errata cannot be executed. Read via IP bus may not work Fixes: 82ce7d0e74b6 ("spi: spi-nxp-fspi: Implement errata workaround for LS1028A") Cc: Vladimir Oltean <[email protected]> Signed-off-by: Michael Walle <[email protected]> Link: https://lore.kernel.org/r/[email protected] Signed-off-by: Mark Brown <[email protected]>
2021-06-14spi: spi-nxp-fspi: move the register operation after the clock enableHaibo Chen1-6/+5
Move the register operation after the clock enable, otherwise system will stuck when this driver probe. Fixes: 71d80563b076 ("spi: spi-nxp-fspi: fix fspi panic by unexpected interrupts") Signed-off-by: Haibo Chen <[email protected]> Link: https://lore.kernel.org/r/[email protected] Signed-off-by: Mark Brown <[email protected]>
2021-03-25spi: fspi: enable fspi driver for on imx8mpHeiko Schocher1-0/+1
add compatible entry in nxp_fspi driver for imx8mp. Signed-off-by: Heiko Schocher <[email protected]> Link: https://lore.kernel.org/r/[email protected] Signed-off-by: Mark Brown <[email protected]>
2021-03-10spi: spi-nxp-fspi: Implement errata workaround for LS1028AKuldeep Singh1-6/+73
Errata ERR050568 description says that "Flash access by FlexSPI AHB command may not work with platform frequency equal to 300 MHz" on LS1028A. By default, smaller length reads(equal to RX FIFO size) are done by IP bus and larger length reads using AHB bus. For adding errata workaround, use IP bus to read entire flash contents and disable AHB path when platform frequency is 300Mhz. Signed-off-by: Kuldeep Singh <[email protected]> Link: https://lore.kernel.org/r/[email protected] Signed-off-by: Mark Brown <[email protected]>
2021-03-10spi: spi-nxp-fspi: Add imx8dxl driver supportHan Xu1-0/+9
Add driver support for imx8dxl which support read through IP bus only and disable AHB bus due to an IC errata. Use the pre-defined quirk FSPI_QUIRK_USE_IP_ONLY directly in device-type data to disable AHB read. Signed-off-by: Han Xu <[email protected]> Signed-off-by: Kuldeep Singh <[email protected]> Link: https://lore.kernel.org/r/[email protected] Signed-off-by: Mark Brown <[email protected]>
2021-03-10spi: spi-nxp-fspi: Add support for IP read onlyKuldeep Singh1-6/+22
Add support for disabling AHB bus and read entire flash contents via IP bus only. Please note, this enables IP bus read using a quirk which can be enabled directly in device-type data or in existence of an errata where AHB bus may need to be disabled. Signed-off-by: Kuldeep Singh <[email protected]> Link: https://lore.kernel.org/r/[email protected] Signed-off-by: Mark Brown <[email protected]>
2020-11-23spi: spi-nxp-fspi: fix fspi panic by unexpected interruptsRan Wang1-0/+7
Given the case that bootloader(such as UEFI)'s FSPI driver might not handle all interrupts before loading kernel, those legacy interrupts would assert immidiately once kernel's FSPI driver enable them. Further, if it was FSPI_INTR_IPCMDDONE, the irq handler nxp_fspi_irq_handler() would call complete(&f->c) to notify others. However, f->c might not be initialized yet at that time, then cause kernel panic. Of cause, we should fix this issue within bootloader. But it would be better to have this pacth to make dirver more robust (by clearing all interrupt status bits before enabling interrupts). Suggested-by: Han Xu <[email protected]> Signed-off-by: Ran Wang <[email protected]> Link: https://lore.kernel.org/r/[email protected] Signed-off-by: Mark Brown <[email protected]>
2020-09-17spi: spi-nxp-fspi: Add ACPI supportkuldip dwivedi1-19/+50
Currently NXP fspi driver has support of DT only. Adding ACPI support to the driver so that it can be used by UEFI firmware booting in ACPI mode. This driver will be probed if any firmware will expose HID "NXP0009" in DSDT table. Signed-off-by: kuldip dwivedi <[email protected]> Reviewed-by: Ashish Kumar <[email protected]> Link: https://lore.kernel.org/r/[email protected] Signed-off-by: Mark Brown <[email protected]>
2020-03-12spi: spi-nxp-fspi: Fix a NULL vs IS_ERR() check in probeDan Carpenter1-2/+2
The platform_get_resource_byname() function returns NULL on error, it doesn't return error pointers. Fixes: d166a73503ef ("spi: fspi: dynamically alloc AHB memory") Signed-off-by: Dan Carpenter <[email protected]> Link: https://lore.kernel.org/r/20200312113154.GC20562@mwanda Signed-off-by: Mark Brown <[email protected]>
2020-03-05spi: spi-nxp-fspi: Enable the Octal Mode in MCR0Han Xu1-2/+3
Apply patch from NXP upstream repo to Enable the octal combination mode in MCR0 Signed-off-by: Adam Ford <[email protected]> Signed-off-by: Han Xu <[email protected]> Link: https://lore.kernel.org/r/[email protected] Signed-off-by: Mark Brown <[email protected]>
2020-03-05spi: fspi: dynamically alloc AHB memoryHan Xu1-6/+34
Apply patch from NXP upstream repo to dynamically allocate AHB memory as needed. Signed-off-by: Adam Ford <[email protected]> Signed-off-by: Han Xu <[email protected]> Link: https://lore.kernel.org/r/[email protected] Signed-off-by: Mark Brown <[email protected]>
2020-03-05spi: fspi: enable fspi on imx8qxp and imx8mmHan Xu1-0/+18
Pull in this patch from NXP's upstream repo to enable fspi on imx8qxp and imx8mm Signed-off-by: Adam Ford <[email protected]> Signed-off-by: Han Xu <[email protected]> Link: https://lore.kernel.org/r/[email protected] Signed-off-by: Mark Brown <[email protected]>
2019-12-16spi: nxp-fspi: Ensure width is respected in spi-mem operationsMichael Walle1-1/+1
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: a5356aef6a90 ("spi: spi-mem: Add driver for NXP FlexSPI controller") Signed-off-by: Michael Walle <[email protected]> Link: https://lore.kernel.org/r/[email protected] Signed-off-by: Mark Brown <[email protected]>
2019-11-11spi: nxp-fspi: Use devm API to fix missed unregistration of controllerChuhong Yuan1-1/+1
This driver forgets to unregister controller when remove. Use devm API to unregister it automatically to fix it. Signed-off-by: Chuhong Yuan <[email protected]> Link: https://lore.kernel.org/r/[email protected] Signed-off-by: Mark Brown <[email protected]>
2019-08-02spi: Remove dev_err() usage after platform_get_irq()Stephen Boyd1-3/+1
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 <[email protected]> Cc: [email protected] Cc: Greg Kroah-Hartman <[email protected]> Signed-off-by: Stephen Boyd <[email protected]> Link: https://lore.kernel.org/r/[email protected] Signed-off-by: Mark Brown <[email protected]>
2019-01-29spi: spi-mem: spi-nxp-fspi: add module license infoYogesh Narayan Gaur1-2/+3
Add MODULE_LICENSE info to fix below warning: WARNING: modpost: missing MODULE_LICENSE() in drivers/spi/spi-nxp-fspi.o Typo fix in Boris Brezillon last name. Fixes: a5356aef6a90 ("spi: spi-mem: Add driver for NXP FlexSPI controller") Reported-by: Stephen Rothwell <[email protected]> Signed-off-by: Yogesh Narayan Gaur <[email protected]> Signed-off-by: Mark Brown <[email protected]>
2019-01-28spi: nxp-fspi: add octal mode flag bit for octal supportYogesh Narayan Gaur1-2/+2
Add octal mode flags for octal I/O data transfer support. NXP FlexSPI controller supports 8 lines Rx/Tx data transfer. Signed-off-by: Yogesh Narayan Gaur <[email protected]> Signed-off-by: Mark Brown <[email protected]>
2019-01-28spi: spi-mem: Add driver for NXP FlexSPI controllerYogesh Narayan Gaur1-0/+1105
- Add driver for NXP FlexSPI host controller (0) What is the FlexSPI controller? FlexSPI is a flexsible SPI host controller which supports two SPI channels and up to 4 external devices. Each channel supports Single/Dual/Quad/Octal mode data transfer (1/2/4/8 bidirectional data lines) i.e. FlexSPI acts as an interface to external devices, maximum 4, each with up to 8 bidirectional data lines. It uses new SPI memory interface of the SPI framework to issue flash memory operations to up to four connected flash devices (2 buses with 2 CS each). (1) Tested this driver with the mtd_debug and JFFS2 filesystem utility on NXP LX2160ARDB and LX2160AQDS targets. LX2160ARDB is having two NOR slave device connected on single bus A i.e. A0 and A1 (CS0 and CS1). LX2160AQDS is having two NOR slave device connected on separate buses one flash on A0 and second on B1 i.e. (CS0 and CS3). Verified this driver on following SPI NOR flashes: Micron, mt35xu512ab, [Read - 1 bit mode] Cypress, s25fl512s, [Read - 1/2/4 bit mode] Signed-off-by: Yogesh Narayan Gaur <[email protected]> Reviewed-by: Frieder Schrempf <[email protected]> Reviewed-by: Boris Brezillon <[email protected]> Tested-by: Ashish Kumar <[email protected]> Signed-off-by: Mark Brown <[email protected]>
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