kernel/arch/arm/mach-at91, branch linux-6.2.y

Merge tag 'for-linus' of git://git.armlinux.org.uk/~rmk/linux-arm

2022-12-13T23:22:14Z

Pull ARM updates from Russell King: - update unwinder to cope with module PLTs - enable UBSAN on ARM - improve kernel fault message - update UEFI runtime page tables dump - avoid clang's __aeabi_uldivmod generated in NWFPE code - disable FIQs on CPU shutdown paths - update XOR register usage - a number of build updates (using .arch, thread pointer, removal of lazy evaluation in Makefile) - conversion of stacktrace code to stackwalk - findbit assembly updates - hwcap feature updates for ARMv8 CPUs - instruction dump updates for big-endian platforms - support for function error injection * tag 'for-linus' of git://git.armlinux.org.uk/~rmk/linux-arm: (31 commits) ARM: 9279/1: support function error injection ARM: 9277/1: Make the dumped instructions are consistent with the disassembled ones ARM: 9276/1: Refactor dump_instr() ARM: 9275/1: Drop '-mthumb' from AFLAGS_ISA ARM: 9274/1: Add hwcap for Speculative Store Bypassing Safe ARM: 9273/1: Add hwcap for Speculation Barrier(SB) ARM: 9272/1: vfp: Add hwcap for FEAT_AA32I8MM ARM: 9271/1: vfp: Add hwcap for FEAT_AA32BF16 ARM: 9270/1: vfp: Add hwcap for FEAT_FHM ARM: 9269/1: vfp: Add hwcap for FEAT_DotProd ARM: 9268/1: vfp: Add hwcap FPHP and ASIMDHP for FEAT_FP16 ARM: 9267/1: Define Armv8 registers in AArch32 state ARM: findbit: add unwinder information ARM: findbit: operate by words ARM: findbit: convert to macros ARM: findbit: provide more efficient ARMv7 implementation ARM: findbit: document ARMv5 bit offset calculation ARM: 9259/1: stacktrace: Convert stacktrace to generic ARCH_STACKWALK ARM: 9258/1: stacktrace: Make stack walk callback consistent with generic code ARM: 9265/1: pass -march= only to compiler ...

ARM: at91: fix build for SAMA5D3 w/o L2 cache

2022-11-24T10:50:07Z

The L2 cache is present on the newer SAMA5D2 and SAMA5D4 families, but apparently not for the older SAMA5D3. Solves a build-time regression with the following symptom: sama5.c:(.init.text+0x48): undefined reference to `outer_cache' Fixes: 3b5a7ca7d252 ("ARM: at91: setup outer cache .write_sec() callback if needed") Signed-off-by: Peter Rosin [claudiu.beznea: delete "At least not always." from commit description] Signed-off-by: Claudiu Beznea Link: https://lore.kernel.org/r/b7f8dacc-5e1f-0eb2-188e-3ad9a9f7613d@axentia.se

ARM: 9263/1: use .arch directives instead of assembler command line flags

2022-11-08T18:36:17Z

Similar to commit a6c30873ee4a ("ARM: 8989/1: use .fpu assembler directives instead of assembler arguments"). GCC and GNU binutils support setting the "sub arch" via -march=, -Wa,-march, target function attribute, and .arch assembler directive. Clang was missing support for -Wa,-march=, but this was implemented in clang-13. The behavior of both GCC and Clang is to prefer -Wa,-march= over -march= for assembler and assembler-with-cpp sources, but Clang will warn about the -march= being unused. clang: warning: argument unused during compilation: '-march=armv6k' [-Wunused-command-line-argument] Since most assembler is non-conditionally assembled with one sub arch (modulo arch/arm/delay-loop.S which conditionally is assembled as armv4 based on CONFIG_ARCH_RPC, and arch/arm/mach-at91/pm-suspend.S which is conditionally assembled as armv7-a based on CONFIG_CPU_V7), prefer the .arch assembler directive. Add a few more instances found in compile testing as found by Arnd and Nathan. Link: https://github.com/llvm/llvm-project/commit/1d51c699b9e2ebc5bcfdbe85c74cc871426333d4 Link: https://bugs.llvm.org/show_bug.cgi?id=48894 Link: https://github.com/ClangBuiltLinux/linux/issues/1195 Link: https://github.com/ClangBuiltLinux/linux/issues/1315 Suggested-by: Arnd Bergmann Suggested-by: Nathan Chancellor Signed-off-by: Arnd Bergmann Tested-by: Nathan Chancellor Signed-off-by: Nick Desaulniers Signed-off-by: Russell King (Oracle)

ARM: at91: pm: avoid soft resetting AC DLL

2022-11-01T10:25:19Z

Do not soft reset AC DLL as controller is buggy and this operation my introduce glitches in the controller leading to undefined behavior. Fixes: f0bbf17958e8 ("ARM: at91: pm: add self-refresh support for sama7g5") Depends-on: a02875c4cbd6 ("ARM: at91: pm: fix self-refresh for sama7g5") Signed-off-by: Claudiu Beznea Link: https://lore.kernel.org/r/20221026124114.985876-2-claudiu.beznea@microchip.com

Merge tag 'pinctrl-v6.1-1' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-pinctrl

2022-10-11T17:59:59Z

Pull pin control updates from Linus Walleij: "There is nothing exciting going on, no core changes, just a few drivers and cleanups. New drivers: - Cypress CY8C95x0 chip pin control support, along with an immediate cleanup - Mediatek MT8188 SoC pin control support - Qualcomm SM8450 and SC8280XP LPASS (low power audio subsystem) pin control support - Qualcomm PM7250, PM8450 - Rockchip RV1126 SoC pin control support Improvements: - Fix some missing pins in the Armada 37xx driver - Convert Broadcom and Nomadik drivers to use PINCTRL_PINGROUP() macro - Fix some GPIO irq_chips to be immutable - Massive Qualcomm device tree binding cleanup, with more to come" * tag 'pinctrl-v6.1-1' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-pinctrl: (119 commits) MAINTAINERS: adjust STARFIVE JH7100 PINCTRL DRIVER after file movement pinctrl: starfive: Rename "pinctrl-starfive" to "pinctrl-starfive-jh7100" pinctrl: Create subdirectory for StarFive drivers dt-bindings: pinctrl: st,stm32: Document interrupt-controller property dt-bindings: pinctrl: st,stm32: Document gpio-hog pattern property dt-bindings: pinctrl: st,stm32: Document gpio-line-names pinctrl: st: stop abusing of_get_named_gpio() pinctrl: wpcm450: Correct the fwnode_irq_get() return value check pinctrl: bcm: Remove unused struct bcm6328_pingroup pinctrl: qcom: restrict drivers per ARM/ARM64 pinctrl: bcm: ns: Remove redundant dev_err call gpio: rockchip: request GPIO mux to pinctrl when setting direction pinctrl: rockchip: add pinmux_ops.gpio_set_direction callback pinctrl: cy8c95x0: Align function names in cy8c95x0_pmxops pinctrl: cy8c95x0: Drop atomicity on operations on push_pull pinctrl: cy8c95x0: Lock register accesses in cy8c95x0_set_mux() pinctrl: sunxi: sun50i-h5: Switch to use dev_err_probe() helper pinctrl: stm32: Switch to use dev_err_probe() helper dt-bindings: qcom-pmic-gpio: Add PM7250B and PM8450 bindings pinctrl: qcom: spmi-gpio: Add compatible for PM7250B ...

Merge tag 'arm-soc-6.1' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc

2022-10-06T18:22:25Z

Pull ARM SoC updates from Arnd Bergmann: "The main changes this time are for the organization of the Kconfig files, introducing per-vendor top-level options on arm64 to match those on arm32, and making the platform selection on arm32 more uniform, in particular for the remaining StrongARM platforms that still have a couple of special cases compared to the more recent ones. I also did a cleanup of the old Footbridge platform, which was the last holdout for the phys_to_dma()/dma_to_phys() interface that is now completely gone from arm32, completing work started by Christoph Hellwig" * tag 'arm-soc-6.1' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc: (21 commits) ARM: aspeed: Kconfig: Fix indentation ARM: Drop CMDLINE_* dependency on ATAGS ARM: Drop CMDLINE_FORCE dependency on !ARCH_MULTIPLATFORM ARM: s3c: remove orphan declarations from arch/arm/mach-s3c/devs.h pxa: Drop if with an always false condition ARM: orion: fix include path ARM: shmobile: Drop selecting SOC_BUS arm64: renesas: Drop selecting SOC_BUS ARM: disallow PCI with MMU=n again ARM: footbridge: remove custom DMA address handling MAINTAINERS: Add BCM4908 maintainer to BCMBCA entry ARM: footbridge: move isa-dma support into footbridge ARM: footbridge: remove leftover from personal-server ARM: footbridge: remove addin mode arm64: Kconfig.platforms: Group NXP platforms together arm64: Kconfig.platforms: Re-organized Broadcom menu ARM: make ARCH_MULTIPLATFORM user-visible ARM: fix XIP_KERNEL dependencies ARM: Kconfig: clean up platform selection ARM: simplify machdirs/platdirs handling ...

pinctrl: at91: move gpio suspend/resume calls to driver's context

2022-09-02T22:19:23Z

Move gpio suspend/resume execution local to driver and let it execute as close as possible to the moment the machine specific PM code is executed (by setting it to .noirq member of dev_pm_ops). With this the at91_pinctrl_gpio_suspend()/at91_pinctrl_gpio_resume() calls were removed from arch/arm/mach-at91/pm.c and also a header has been removed. The patch has been checked on sama5d3_xplained, sam9x60ek, sama5d2_xplained, sama7g5ek boards. Signed-off-by: Claudiu Beznea Link: https://lore.kernel.org/r/20220831135636.3176406-3-claudiu.beznea@microchip.com Signed-off-by: Linus Walleij

ARM: at91: pm: fix DDR recalibration when resuming from backup and self-refresh

2022-08-31T07:28:18Z

On SAMA7G5, when resuming from backup and self-refresh, the bootloader performs DDR PHY recalibration by restoring the value of ZQ0SR0 (stored in RAM by Linux before going to backup and self-refresh). It has been discovered that the current procedure doesn't work for all possible values that might go to ZQ0SR0 due to hardware bug. The workaround to this is to avoid storing some values in ZQ0SR0. Thus Linux will read the ZQ0SR0 register and cache its value in RAM after processing it (using modified_gray_code array). The bootloader will restore the processed value. Fixes: d2d4716d8384 ("ARM: at91: pm: save ddr phy calibration data to securam") Suggested-by: Frederic Schumacher Signed-off-by: Claudiu Beznea Link: https://lore.kernel.org/r/20220826083927.3107272-4-claudiu.beznea@microchip.com

ARM: at91: pm: fix self-refresh for sama7g5

2022-08-31T07:27:57Z

It has been discovered that on some parts, from time to time, self-refresh procedure doesn't work as expected. Debugging and investigating it proved that disabling AC DLL introduce glitches in RAM controllers which leads to unexpected behavior. This is confirmed as a hardware bug. DLL bypass disables 3 DLLs: 2 DX DLLs and AC DLL. Thus, keep only DX DLLs disabled. This introduce 6mA extra current consumption on VDDCORE when switching to any ULP mode or standby mode but the self-refresh procedure still works. Fixes: f0bbf17958e8 ("ARM: at91: pm: add self-refresh support for sama7g5") Suggested-by: Frederic Schumacher Signed-off-by: Claudiu Beznea Tested-by: Cristian Birsan Link: https://lore.kernel.org/r/20220826083927.3107272-3-claudiu.beznea@microchip.com

ARM: remove obsolete Makefile.boot infrastructure

2022-08-18T14:44:59Z

There are a number of old Makefile.boot files that remain from the multiplatform conversion, and three that are still in use. These provide the "ZRELADDR", "PARAMS_PHYS" and "INITRD_PHYS" values that are platform specific. It turns out that we can generally just derive this from information that is available elsewhere: - ZRELADDR is normally detected at runtime with the CONFIG_AUTO_ZRELADDR flag, but also needed to be passed to for 'make uImage'. In a multiplatform kernel, one always has to pass this as the $(LOADADDR) variable, but in the StrongARM kernels we can derive it from the sum of $(CONFIG_PHYS_OFFSET) and $(TEXT_OFFSET) that are already known. - PARAMS_PHYS and INITRD_PHYS are only used for bootpImage, which in turn is only used for the pre-ATAGS 'param_struct' based boot interface on StrongARM based machines with old boot loaders. They can both be derived from CONFIG_PHYS_OFFSET and a machine specific offset for the initrd, so all of the logic for these can be part of arch/arm/boot/bootp/Makefile. Signed-off-by: Arnd Bergmann