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2022-01-28pci: Fix setting controller's last_busnoPali Rohár
Initially it is set to dev_seq but update to the last bus number is missing. Fix it. Signed-off-by: Pali Rohár <[email protected]> Reviewed-by: Stefan Roese <[email protected]>
2022-01-28fastboot: only look up real partition names when no alias existsMatthias Schiffer
Having U-Boot look up the passed partition name even though an alias exists is unexpected, leading to warning messages (when the alias name doesn't exist as a real partition name) or the use of the wrong partition. Change part_get_info_by_name_or_alias() to consider real partitions names only if no alias of the same name exists, allowing to use aliases to override the configuration for existing partition names. Also change one use of strcpy() to strlcpy(). Signed-off-by: Matthias Schiffer <[email protected]> Reviewed-by: Sean Anderson <[email protected]>
2022-01-28dfu: handle short frame result of UPLOAD in state_dfu_idlePatrick Delaunay
In DFU v1.1 specification [1] the DFU_UPLOAD (Short Frame) is handled only in dfuUPLOADIDLE state: - Figure A.1 Interface state transition diagram - the state description in chapter A.2 A.2.3 State 2 dfuIDLE on Receipt of the DFU_UPLOAD request,and bitCanUpload = 1 the Next State is dfuUPLOADIDLE A.2.10 State 9 dfuUPLOAD-IDLE When the length of the data transferred by the device in response to a DFU_UPLOAD request is less than wLength. (Short frame) the Next State is dfuIDLE In current code, when an UPLOAD is completely performed after the first request (for example with wLength=200 and data read = 9), the DFU state stay at dfuUPLOADIDLE until receiving a DFU_UPLOAD or a DFU_ABORT request even it is unnecessary as the previous DFU_UPLOAD request already reached the EOF. This patch proposes to finish the DFU uploading (don't go to dfuUPLOADIDLE) and completes the control-read operation (go to DFU_STATE_dfuIDLE) when the first UPLOAD response has a short frame as an end of file (EOF) indicator even if it is not explicitly allowed in the DFU specification but this seems logical. [1] https://www.usb.org/sites/default/files/DFU_1.1.pdf Signed-off-by: Patrick Delaunay <[email protected]>
2022-01-28fastboot: fix fastboot_set_reboot_flag()Roman Stratiienko
In case CONFIG_FASTBOOT_FLASH_MMC_DEV == 0, compile-time condition is not met and fastboot_set_reboot_flag() fails. Fixes: a362ce214f03 ("fastboot: Implement generic fastboot_set_reboot_flag") Signed-off-by: Roman Stratiienko <[email protected]> Reviewed-by: Sean Anderson <[email protected]> Tested-by: Mattijs Korpershoek <[email protected]>
2022-01-27Merge tag 'dm-pull-26jan22' of ↵Tom Rini
https://source.denx.de/u-boot/custodians/u-boot-dm acpi refactoring to allow non-x86 use binman support for bintools (binary tools) minor tools improvements in preparation for FDT signing various minor fixes and improvements
2022-01-26usb: gadget: Add CDC ACM functionLoic Poulain
Add support for CDC ACM using the new UDC and gadget API. This protocol can be used for serial over USB data transfer and is widely supported by various OS (GNU/Linux, MS-Windows, OSX...). The usual purpose of such link is to access device debug console and can be useful for products not exposing regular UART to the user. A default stdio device named 'usbacm' is created, and can be used to redirect console to USB link over CDC ACM: > setenv stdin usbacm; setenv stdout usbacm Signed-off-by: Loic Poulain <[email protected]>
2022-01-26usb: ehci: dm: Convert i.MX28 ehci code to driver modelLukasz Majewski
This commit converts i.MX28's EHCI USB host driver to driver model (DM_USB). It is a straightforward conversion (to reuse as much code as possible), based on ehci-mx5.c code. Signed-off-by: Lukasz Majewski <[email protected]>
2022-01-26usb: ehci: Move common mxs code to separate functions (ehci_hcd_{stop|start})Lukasz Majewski
Those functions will be re-used when the ehci MXS driver (for imx28) will be converted to also support CONFIG_DM_USB. No functional changes introduced - only cosmetic changes (u32 type) and alignment to pass checkpatch. Signed-off-by: Lukasz Majewski <[email protected]>
2022-01-26usb: ehci: Refactor the ehci_mxs_toggle_clock function to be reused with DMLukasz Majewski
This function is going to be reused with the CONFIG_DM_USB enabled in the imx28 mxs USB ehci driver. No functional changes introduced. Signed-off-by: Lukasz Majewski <[email protected]>
2022-01-26usb: Modify Kconfig of the USB_EHCI_MXS to use this driver with imx28Lukasz Majewski
The ehci-mxs driver can be also used with imx28 SoC, not only imx23. Signed-off-by: Lukasz Majewski <[email protected]>
2022-01-25sandbox: sandbox_serial_pending depends on DM_VIDEOHeinrich Schuchardt
When building sandbox_defconfig with CONFIG_DM_VIDEO=n a link time error occurs: in function `sandbox_serial_pending': drivers/serial/sandbox.c:101: undefined reference to `video_sync_all' video_sync_all() is only defined if we have CONFIG_DM_VIDEO=y. Calling this function in a serial driver looks quite hackish but at least let's add the missing build constraint. Signed-off-by: Heinrich Schuchardt <[email protected]> Reviewed-by: Simon Glass <[email protected]>
2022-01-25usb: Use the first available device for ehci_gadgetSean Anderson
For whatever reason, usb_setup_ehci_gadget removes and probes USB device 0. However, not all systems have a device 0. Use the first device instead. The device probed should probably have something to do with the controller (as specified by e.g. ums <controller> or fastboot <controller>). In fact, I find it odd that we probe the USB device in the first place, because this is just to set up the gadget itself. Presumably, the controller should be probed by usb_gadget_initialize somehow. Signed-off-by: Sean Anderson <[email protected]> Reviewed-by: Simon Glass <[email protected]>
2022-01-25acpi: Tidy up the item listSimon Glass
At present this is really just a debugging aid, but it is a bit untidy. Add proper columns and display the type name instead of a number. Sample output for coral: => acpi items Seq Type Addr Size Device/Writer --- ----- -------- ---- ------------- 0 other 79925000 240 0base 1 other 79925240 40 1facs 2 dsdt 799252a4 58 board 3 dsdt 799252fc 10 lpc 4 other 79925280 32f0 3dsdt 5 other 79928570 1000 4gnvs 6 other 79929570 100 5fact 7 other 79929670 30 5mcfg 8 other 799296a0 50 5spcr 9 other 799296f0 50 5tpm2 a other 79929740 70 5x86 b ssdt 799297d4 fe maxim-codec c ssdt 799298d2 28 i2c2@16,0 d ssdt 799298fa 270 da-codec e ssdt 79929b6a 28 i2c2@16,1 f ssdt 79929b92 28 i2c2@16,2 10 ssdt 79929bba 83 tpm@50 11 ssdt 79929c3d 28 i2c2@16,3 12 ssdt 79929c65 282 elan-touchscreen@10 13 ssdt 79929ee7 285 raydium-touchscreen@39 14 ssdt 7992a16c 28 i2c2@17,0 15 ssdt 7992a194 d8 elan-touchpad@15 16 ssdt 7992a26c 163 synaptics-touchpad@2c 17 ssdt 7992a3cf 28 i2c2@17,1 18 ssdt 7992a3f7 111 wacom-digitizer@9 19 ssdt 7992a508 8f sdmmc@1b,0 1a ssdt 7992a597 4b wifi 1b ssdt 7992a5e2 1a0 cpu@0 1c ssdt 7992a782 1a0 cpu@1 1d ssdt 7992a922 1a0 cpu@2 1e ssdt 7992aac2 211 cpu@3 1f other 799297b0 1530 6ssdt 20 other 7992ace0 2f10 8dev Signed-off-by: Simon Glass <[email protected]>
2022-01-25acpi: Collect tables in the acpi_item listSimon Glass
At present this list is used to collect items within the DSDT and SSDT tables. It is useful for it to collect the whole tables as well, so there is a list of what was created and which write created each one. Refactor the code accordingly. Signed-off-by: Simon Glass <[email protected]>
2022-01-25x86: Use the ACPI table writerSimon Glass
Use the new ACPI writer to write the ACPI tables. At present this is all done in one monolithic function. Future work will split this out. Unfortunately the QFW write_acpi_tables() function conflicts with the 'writer' version, so disable that for sandbox. Signed-off-by: Simon Glass <[email protected]>
2022-01-25acpi: Add a table startSimon Glass
It is useful to record the start of an ACPI table so that offsets from that point can be easily calculated. Add this to the context and set it before calling the writer method. Signed-off-by: Simon Glass <[email protected]>
2022-01-25sandbox: Allow building with GENERATE_ACPI_TABLESimon Glass
At present this option is missing a header file, a function prototype and the qfw driver needs a header included. Fix these problems so we can enable this option on sandbox. This will increase the build coverage. Signed-off-by: Simon Glass <[email protected]>
2022-01-24pci: iproc: Set all 24 bits of PCI class codePali Rohár
Register 0x43c in its low 24 bits contains PCI class code. Update code to set all 24 bits of PCI class code and not only upper 16 bits of PCI class code. Use standard U-Boot macro (PCI_CLASS_BRIDGE_PCI << 8) for constructing all 24-bits of PCI class for PCI bridge Normal decode. Signed-off-by: Pali Rohár <[email protected]> Acked-by: Roman Bacik <[email protected]>
2022-01-24misc: mark write buffer constJohn Keeping
The write operation in misc_ops already takes a "const void *" buffer, but misc_write() takes a mutable "void *". There's no reason for this, so make misc_write() consistent with the standard write() prototype. Signed-off-by: John Keeping <[email protected]> Reviewed-by: Simon Glass <[email protected]>
2022-01-21configs: Migrate CONFIG_SYS_MAX_FLASH_BANKS to KconfigPatrick Delaunay
Use moveconfig.py script to convert define CONFIG_SYS_MAX_FLASH_BANKS and CONFIG_SYS_MAX_FLASH_BANKS_DETECT to Kconfig and move these entries to defconfigs. Signed-off-by: Patrick Delaunay <[email protected]> Reviewed-by: Simon Glass <[email protected]> Reviewed-by: Stefan Roese <[email protected]> [trini: Re-switch to IS_ENABLED check in spi-nor-core.c, re-run migration] Signed-off-by: Tom Rini <[email protected]>
2022-01-21mtd: cfi: change CONFIG_SYS_MAX_FLASH_BANKS_DETECT as booleanPatrick Delaunay
Prepare migration to Kconfig. CONFIG_SYS_MAX_FLASH_BANKS_DETECT becomes boolean and CONFIG_SYS_MAX_FLASH_BANKS define the MAX size, also used for detection when CONFIG_SYS_MAX_FLASH_BANKS_DETECT=y (CFI_MAX_FLASH_BANKS = CONFIG_SYS_MAX_FLASH_BANKS). CONFIG_SYS_MAX_FLASH_BANKS become mandatory when CONFIG_SYS_MAX_FLASH_BANKS_DETECT is activated. Signed-off-by: Patrick Delaunay <[email protected]> Reviewed-by: Stefan Roese <[email protected]>
2022-01-21mtd: cfi: introduce CFI_FLASH_BANKSPatrick Delaunay
Replace CONFIG_SYS_MAX_FLASH_BANKS by CFI_FLASH_BANKS to prepare Kconfig migration and avoid to redefine CONFIG_SYS_MAX_FLASH_BANKS in cfi_flash.h. After this patch CONFIG_SYS_MAX_FLASH_BANKS should be never used in the cfi code: use CFI_MAX_FLASH_BANKS for struct size or CFI_FLASH_BANKS for number of CFI banks which can be dynamic. This patch modify all the files which include mtd/cfi_flash.h. Signed-off-by: Patrick Delaunay <[email protected]> Reviewed-by: Stefan Roese <[email protected]>
2022-01-20Merge https://source.denx.de/u-boot/custodians/u-boot-marvellTom Rini
- fdt_support: Add fdt_for_each_node_by_compatible() helper macro (Marek) - turris_omnia: Fixup SATA or PCIe nodes at runtime in DT blob (Pali) - pci_mvebu: Add support for Kirkwood PCIe controllers (Pali) - SPL: More verifications for kwbimage in SPL (Pali) - mvebu: Remove comphy_update_map() (Pali) - Minor misc stuff
2022-01-20Merge tag 'doc-2022-04-rc1' of ↵Tom Rini
https://source.denx.de/u-boot/custodians/u-boot-efi Pull request doc-2022-04-rc1 Replace @return by Return: in code comments.
2022-01-20phy: marvell: Remove unused function comphy_update_map()Pali Rohár
This weak function is not used anymore, so completely remove it. Private struct comphy_map is not used by any board code anymore, so move it into private driver header file comphy_core.h. Signed-off-by: Pali Rohár <[email protected]> Reviewed-by: Stefan Roese <[email protected]>
2022-01-20drivers: octeon: get rid of Unicode in codeHeinrich Schuchardt
Placing Unicode control codes <U+0080><U+0093> in the middle of a comment does not make much sense. Let's get rid of all Unicode in drivers/ram/octeon/octeon3_lmc.c. Signed-off-by: Heinrich Schuchardt <[email protected]> Reviewed-by: Stefan Roese <[email protected]>
2022-01-20SPL: Add struct spl_boot_device parameter into spl_parse_board_header()Pali Rohár
Add parameter spl_boot_device to spl_parse_board_header(), which allows the implementations to see from which device we are booting and do boot-device-specific checks of the image header. Signed-off-by: Pali Rohár <[email protected]> Signed-off-by: Marek Behún <[email protected]> Reviewed-by: Stefan Roese <[email protected]>
2022-01-20pci: pci_mvebu: Add support for Kirkwood PCIe controllersPali Rohár
Kirkwood uses macros KW_DEFADR_PCI_MEM and KW_DEFADR_PCI_IO for base address of PCIe mappings. Size of PCIe windows is not defined in any macro yet, so export them in new KW_DEFADR_PCI_MEM_SIZE and KW_DEFADR_PCI_IO_SIZE macros. Kirkwood arch code already maps mbus windows for io and mem, so avoid calling mvebu_mbus_add_window_by_id() function which would try to do duplicate window mapping. Kirkwood PCIe controllers already use "marvell,kirkwood-pcie" DT compatible string, so mark pci_mvebu.c driver as compatible for it. Signed-off-by: Pali Rohár <[email protected]> Reviewed-by: Stefan Roese <[email protected]>
2022-01-20fdt_support: Add fdt_for_each_node_by_compatible() helper macroMarek Behún
Add macro fdt_for_each_node_by_compatible() to allow iterating over fdt nodes by compatible string. Convert various usages of off = fdt_node_offset_by_compatible(fdt, start, compat); while (off > 0) { code(); off = fdt_node_offset_by_compatible(fdt, off, compat); } and similar, to fdt_for_each_node_by_compatible(off, fdt, start, compat) code(); Signed-off-by: Marek Behún <[email protected]> Reviewed-by: Stefan Roese <[email protected]> Reviewed-by: Simon Glass <[email protected]>
2022-01-19doc: replace @return by Return:Heinrich Schuchardt
Sphinx expects Return: and not @return to indicate a return value. find . -name '*.c' -exec \ sed -i 's/^\(\s\)\*\(\s*\)@return\(\s\)/\1*\2Return:\3/' {} \; find . -name '*.h' -exec \ sed -i 's/^\(\s\)\*\(\s*\)@return\(\s\)/\1*\2Return:\3/' {} \; Signed-off-by: Heinrich Schuchardt <[email protected]>
2022-01-19Merge tag 'xilinx-for-v2022.04-rc1' of ↵Tom Rini
https://source.denx.de/u-boot/custodians/u-boot-microblaze Xilinx changes for v2022.04-rc1 gpio: - Add modepin driver net: - Save random mac addresses to eth variable zynqmp gem: - Add support for mdio bus DT description - Add support for reset and SGMII phy configuration - Reduce timeout for MDIO accesses zynqmp clk: - Fix clock handling for gem and usb phy: - Add zynqmp phy/serdes driver serial: - Add one missing compatible string microblaze: - Symbol alignement - SPL fixups - Code cleanups zynqmp: - Various dt changes, DP pre-reloc, gem resets, gem clocks - Switch SOM to shared psu configuration - Move dcache handling to firmware driver - Workaround gmii2rgmii DT description issue - Enable broadcasts again - Change firmware enablement logic - Small adjustement in firmware driver versal: - Support new mmc@ DT nodes - Fix run time variable handling - Add missing I2C_PMC ID for power domain
2022-01-19firmware: zynqmp: Do not report error if node is already configuredMichal Simek
Power domain driver sends PM fragment to PMUFW. It is sent for every node which is listed in DT. But some nodes could be already enabled but driver is not capable to find it out. That's why it blinly sents request for every listed IP. When PMUFW response by XST_PM_ALREADY_CONFIGURED error code there is no need to show any error message because node is already enabled. That's why cover this case with message when DEBUG is enabled. Signed-off-by: Michal Simek <[email protected]> Link: https://lore.kernel.org/r/8c15ef0b68cf191f693d3d010f70ac24cfd8171f.1642163135.git.michal.simek@xilinx.com
2022-01-19firmware: zynqmp: Move loading message to debugMichal Simek
Power domain driver is using this function for every IP which is PD listed. This can end up with a lot of messages which end up in boot log. That's why show it only in EL3 as was used in past. Signed-off-by: Michal Simek <[email protected]> Link: https://lore.kernel.org/r/d73fc8bc663110b6e8d5e70fdb6435d1199e9db8.1642163135.git.michal.simek@xilinx.com
2022-01-18clk: ast2600: Revise MII interface delayDylan Hung
The clock delay of the RMII/RGMII interface is controlled by SCU340~35C. These values are obtained by measurement and experiments so we simply use macro to define them. Signed-off-by: Dylan Hung <[email protected]> Reviewed-by: Ramon Fried <[email protected]>
2022-01-18net: ftgmac100: Add Aspeed AST2600 supportDylan Hung
Add support of the MAC controller of Aspeed AST2600 SOC. The MAC controller is the same with AST2500, except it has stand-alone MDIO hardware block. Signed-off-by: Dylan Hung <[email protected]> Reviewed-by: Ramon Fried <[email protected]>
2022-01-18net: ftgmac100: Add DM_MDIO supportDylan Hung
Add support for DM_MDIO to connect to PHY. For the systems that have a stand-alone MDIO hardware block, enable CONFIG_DM_MDIO to use driver model for MDIO devices. Signed-off-by: Dylan Hung <[email protected]> Reviewed-by: Ramon Fried <[email protected]>
2022-01-18mmc: actions: add MMC driver for Actions OWL S700/S900Amit Singh Tomar
This commit adds support for MMC controllers found on Actions OWL SoC platform(S700/S900). Signed-off-by: Amit Singh Tomar <[email protected]>
2022-01-18clk: actions: Add SD/MMC clocksAmit Singh Tomar
This commit adds SD/MMC clocks, and provides .set/get_rate callbacks for SD/MMC device present on Actions OWL S700 SoCs. Signed-off-by: Amit Singh Tomar <[email protected]>
2022-01-18clk: actions: Introduce dummy get/set_rate callbacksAmit Singh Tomar
This commit introduces get/set_rate callbacks, these are dummy at the moment, and can be used to get/set clock for various devices based on the clk id. Signed-off-by: Amit Singh Tomar <[email protected]> Reviewed-by: Sean Anderson <[email protected]>
2022-01-18pinctrl: single: add support for pinctrl-single, pins when #pinctrl-cells = 2AJ Bagwell
Changes to the am33xx device (33e9021a) trees have been merged in from the upstream linux kernel which now means the device tree uses the new pins format (as of 5.10) where the confinguration can be stores as a separate configuration value and pin mux mode which are then OR'd together. This patch adds support for the new format to u-boot so that pinctrl-cells is now respected when reading in pinctrl-single,pins Signed-off-by: Anthony Bagwell <[email protected]>
2022-01-17drivers: musb_gadget: Save endpoint desc to usb_ep->descqianfan Zhao
Fix fastboot flash bug. If the downloading file size is equal to the partition size, "fastboot flash" can't work, at least in sunxi platform, because used an uninitalized point: ep->desc. This patch also fixed 'data abort' bug in am335x platform. Reproduce: fastboot flash loader1 spl/sunxi-spl.bin. Signed-off-by: qianfan Zhao <[email protected]> Reviewed-by: Sean Anderson <[email protected]>
2022-01-17mtd: nand: pxa3xx: set mtd->devRobert Marko
Currently the pxa3xx driver does not set the udevice in the mtd_info struct and this prevents the mtd from parsing the partitions via DTS like for SPI-NOR. So simply set the mtd->dev to the driver udevice. Signed-off-by: Robert Marko <[email protected]> Reviewed-by: Stefan Roese <[email protected]>
2022-01-17Merge branch '2022-01-15-TI-platform-updates'Tom Rini
- Let am335x_evm use the CPSW or PRUSS ethernet. - Implement timer_get_boot_us in the omap timer driver - gpmc bitflip, QSPI clock calculation on am437x, da8xx_gpio bugfixes - Assorted K3 updates
2022-01-17Merge tag 'u-boot-at91-2022.04-b' of ↵Tom Rini
https://source.denx.de/u-boot/custodians/u-boot-at91 Second set of u-boot-at91 features for the 2022.04 cycle: This small feature set includes few changes for sama7g5 and sama7g5ek: turn blue led on at boot, changes required for the Rev4 of the board, better sync with the Linux DT with regards to the new DT nodes.
2022-01-17Merge https://source.denx.de/u-boot/custodians/u-boot-pmicTom Rini
- Apple M1 PMIC support
2022-01-17Merge branch 'next' of https://source.denx.de/u-boot/custodians/u-boot-netTom Rini
- PXE label override support - Fastboot UDP configurable port - new phy driver: TI DP83869HM - and few minor fixes to dsa.
2022-01-17net: gem: Workaround gmii2rgmii bridge DT node issueAshok Reddy Soma
For configurations with gmii2rgmii and external phy the DT nodes link should be gem->gmii2rgmii->phy. But due to limitation in Linux driver the DT is mentioned as gem->phy and gmii2rgmii->phy as shown in below DT. ethernet@ff0c0000 { compatible = "cdns,zynqmp-gem\0cdns,gem"; status = "okay"; interrupt-parent = <0x04>; interrupts = <0x00 0x3b 0x04 0x00 0x3b 0x04>; reg = <0x00 0xff0c0000 0x00 0x1000>; clock-names = "pclk\0hclk\0tx_clk\0rx_clk\0tsu_clk"; #address-cells = <0x01>; #size-cells = <0x00>; #stream-id-cells = <0x01>; iommus = <0x0d 0x875>; power-domains = <0x0c 0x1e>; clocks = <0x03 0x1f 0x03 0x69 0x03 0x2e 0x03 0x32 0x03 0x2c>; phy-handle = <0x0e>; phy-mode = "gmii"; xlnx,ptp-enet-clock = <0x00>; local-mac-address = [ff ff ff ff ff ff]; phandle = <0x4d>; mdio { #address-cells = <0x01>; #size-cells = <0x00>; phandle = <0x4e>; ethernet-phy@1 { reg = <0x01>; rxc-skew-ps = <0x708>; txc-skew-ps = <0x708>; phandle = <0x0e>; }; gmii_to_rgmii_0@8 { compatible = "xlnx,gmii-to-rgmii-1.0"; phy-handle = <0x0e>; reg = <0x08>; phandle = <0x4f>; }; }; }; Since same DT is used in Linux and U-Boot we need to workaround this issue by using the gmii2rgmii node which points to phy and we should ignore the gem pointing to phy directly. Do this workaround by updating priv->phydev->node value with priv->phy_of_node only if it is not valid node. Signed-off-by: Ashok Reddy Soma <[email protected]> Signed-off-by: Michal Simek <[email protected]> Reviewed-by: Ramon Fried <[email protected]> Link: https://lore.kernel.org/r/641eb13425ffe80e0743f60cf90d0f940577b9e9.1642162085.git.michal.simek@xilinx.com
2022-01-17Revert "net: gem: Disable broadcast setting"Michal Simek
This reverts commit eafdcda4a854932c0319656de7bf3f017f17ae67. The main reason is that QEMU is using BOOTP protocol which is sending DHCP Offer to a broadcast address that's why it can't be disabled. DHCP protocol has no issue because it returns directly to client MAC address. Both of these options are described in RFC951 (https://datatracker.ietf.org/doc/html/rfc951#section-4) Signed-off-by: Michal Simek <[email protected]> Reviewed-by: Ramon Fried <[email protected]> Link: https://lore.kernel.org/r/fc5f5e2aeca77847ed4ca6a263890375ab9f5163.1642162545.git.michal.simek@xilinx.com
2022-01-17power: domain: Add Apple pmgr driverMark Kettenis
This driver supports power domains for the power management controller found on Apple SoCs. Signed-off-by: Mark Kettenis <[email protected]> Reviewed-by: Jaehoon Chung <[email protected]> Reviewed-by: Simon Glass <[email protected]>
2022-01-16nand: gpmc: Handle bitflips in erased pages when using BCH ECC engineDavid Rivshin
In the case of an erased (sub)page both the data and ECC are all 0xFF bytes. This fails the normal ECC verification, as the computed ECC of all-0xFF is not also 0xFF. The GPMC NAND driver attempted to detect erased pages by checking that the ECC bytes are all-0xFF, but this had two problems: 1) bitflips in the data were not corrected, so the data looked not-erased 2) bitflips in the ECC bytes were reported as uncorrectable ECC errors The equivalent Linux driver [1] correctly handles this by counting the number of 0-bits in the combination of data and ECC bytes. If the number of 0-bits is less than the amount of bits correctable by the selected ECC algorithm, then it is treated as an erased page with correctable bitflips. Implement similar, though simplified, logic in omap_correct_data_bch(). [1] see omap_elm_correct_data() in omap2.c Signed-off-by: David Rivshin <[email protected]>