- 09 Jul, 2024 2 commits
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Paul Burton authored
This patch introduces a couple of utility functions which help later patches with introducing support for multi-cluster systems. - mips_cps_multicluster_cpus() allows its caller to determine whether the system includes CPUs spread across multiple clusters. This is useful because in some cases behaviour can be more optimal taking this knowledge into account. The means by which we check this is dependent upon the way we probe CPUs & assign their numbers, so keeping this knowledge confined here in arch/mips/ seems appropriate. - mips_cps_first_online_in_cluster() allows its caller to determine whether it is running upon the first CPU online within its cluster. This information is useful in cases where some cluster-wide configuration may need to occur, but should not be repeated if another CPU in the cluster is already online. Similarly to the above this is determined based upon knowledge of CPU numbering so it makes sense to keep that knowledge in arch/mips/. The function is defined in mips-cm.c rather than in asm/mips-cps.h in order to allow us to use asm/cpu-info.h & linux/smp.h without encountering an include nightmare. Signed-off-by:
Paul Burton <paulburton@kernel.org> Signed-off-by:
Chao-ying Fu <cfu@wavecomp.com> Signed-off-by:
Dragan Mladjenovic <dragan.mladjenovic@syrmia.com> Signed-off-by:
Aleksandar Rikalo <aleksandar.rikalo@syrmia.com> Signed-off-by:
Thomas Bogendoerfer <tsbogend@alpha.franken.de>
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Dominique Martinet authored
This does not matter the least, but there is no other .[ch] file in the repo that is executable, so clean this up. Fixes: 29b83a64 ("MIPS: Octeon: Add PCIe link status check") Signed-off-by:
Dominique Martinet <dominique.martinet@atmark-techno.com> Signed-off-by:
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- 03 Jul, 2024 9 commits
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Théo Lebrun authored
Register OLB-related files part of the "MOBILEYE MIPS SOCS" MAINTAINERS section. Those include: - drivers (clk-eyeq, reset-eyeq, pinctrl-eyeq5), - dt-bindings (mobileye,eyeq5-olb.yaml file), - bindings includes file <dt-bindings/clock/mobileye,eyeq5-clk.h>. Signed-off-by:
Théo Lebrun <theo.lebrun@bootlin.com> Signed-off-by:
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Théo Lebrun authored
The OLB ("Other Logic Block") is a system-controller region hosting clock, reset and pin controllers. It contains registers such as I2C speed mode that need to be accessible by other nodes. Remove fixed-clocks previously used; replace references. Add parent crystal clock, fixed at 30MHz. Add pin nodes for all functions. Add mobileye,eyeq5-olb compatible node, hosting clk, reset and pinctrl. Add reset and pinctrl references to UART nodes. Signed-off-by: -
Théo Lebrun authored
Add documentation to describe the "Other Logic Block" system-controller. It deals with three platforms: EyeQ5, EyeQ6L and EyeQ6H. First two have a single instance, whereas EyeQ6H has seven named instances. Features provided are: - Clocks, children to main crystal. Some PLLs and divider clocks. - Resets. Some instances DO NOT have reset. - Pinctrl. Only EyeQ5 has such feature. Those are NOT the only features exposed in OLB system-controllers! Many individual registers, related to IP block integration, can be found. Additional features will be exposed over time. We simplify devicetree phandles to OLB in two ways: - Compatibles exposing a single clock do not ask for a index argument. This means we use EyeQ6H OLB south (it has four clocks): clocks = <&olb_south EQ6HC_SOUTH_PLL_PER>; But use EyeQ6H OLB east (it has one clock): clocks = <&olb_east>; - Compatibles exposing a single reset domain do not ask for a domain index, only a reset index. This means we use EyeQ5 OLB (it has three domains): resets = <&olb 0 10>; But use EyeQ6H west reset (it has one domain): resets = <&olb_west 3>; About pinctrl subnodes: all pins have two functionality, either GPIO or something-else. The latter is pin dependent, we express constraints using many if-then. Reviewed-by:Rob Herring (Arm) <robh@kernel.org> Signed-off-by:
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Dmitry Torokhov authored
Switch to use software nodes/properties to describe GPIOs for the ADS7846 touchscreen and the SPI controller (away from using GPIO lookup tables). This allows removing use of ADS7846 platform data, which will be going away. Signed-off-by:
Dmitry Torokhov <dmitry.torokhov@gmail.com> Reviewed-by:
Linus Walleij <linus.walleij@linaro.org> Signed-off-by:
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Jiaxun Yang authored
The original sync-r4k did a good job on reducing jitter by determine the "next time value", but it has a limitation that when synchronization being performed too many times due to high core count or CPU hotplug, the timewrap on CPU0 will become unaccpetable. Rework the mechanism based on latest x86 tsc_sync. (It seems like the original implementation is based on tsc_sync at that time, so it's just a refresh.) To improve overall performance. Tesed on Loongson64, Boston, QEMU. Signed-off-by:
Jiaxun Yang <jiaxun.yang@flygoat.com> Signed-off-by:
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Jiaxun Yang authored
When we have more than one CPU in system, counter synchronisation overhead can lead to a scenario that sched_clock goes backward when being read from different CPUs. This is accommodated by CONFIG_HAVE_UNSTABLE_SCHED_CLOCK, but it's unavailable on 32bit kernel. We don't want to risk sched_clock correctness, so if we have multiple CPU in system and CONFIG_HAVE_UNSTABLE_SCHED_CLOCK is not set, we just don't use counter as sched_clock source. Signed-off-by:
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Jiaxun Yang authored
csrc-r4k suffers from SMP synchronization overhead. Select HAVE_UNSTABLE_SCHED_CLOCK to workaround drift between the CPUs on the system. HAVE_UNSTABLE_SCHED_CLOCK requires cmpxchg64, so enable it for 64 bits only. Signed-off-by:
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Jiaxun Yang authored
CP0 counter suffers from various problems like SMP sync, behaviour on wait. Set CLOCK_SOURCE_MUST_VERIFY and CLOCK_SOURCE_VERIFY_PERCPU, as what x86 did to TSC, to let kernel test it before use. Signed-off-by:
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Jiaxun Yang authored
Increase frequency addend dividend to 10000000 (10MHz) to reasonably accommodate multi GHz level mips_hpt_frequency. Cap rating of csrc-r4k into 299 to ensure it doesn't go into "Desired" range, given all the drama we have with CP0 count registers (SMP sync, behaviour on wait etc). Signed-off-by:
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- 27 Jun, 2024 5 commits
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Daniel González Cabanelas authored
The data RAC is left disabled by the bootloader in some SoCs, at least in the core it boots from. Enabling this feature increases the performance up to +30% depending on the task. Signed-off-by:
Daniel González Cabanelas <dgcbueu@gmail.com> Signed-off-by:
Álvaro Fernández Rojas <noltari@gmail.com> [ rework code and reduce code duplication ] Acked-by:
Florian Fainelli <florian.fainelli@broadcom.com> Signed-off-by:
Christian Marangi <ansuelsmth@gmail.com> Signed-off-by:
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Christian Marangi authored
Add support to provide CBR address from DT to handle broken SoC/Bootloader that doesn't correctly init it. This permits to use the RAC flush even in these condition. To provide a CBR address from DT, the property "brcm,bmips-cbr-reg" needs to be set in the "cpus" node. On DT init, this property presence will be checked and will set the bmips_cbr_addr value accordingly. Also bmips_rac_flush_disable will be set to false as RAC flush can be correctly supported. The CBR address from DT will overwrite the cached one and the one set in the CBR register will be ignored. Also the DT CBR address is validated on being outside DRAM window. Signed-off-by:
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Christian Marangi authored
Document brcm,bmips-cbr-reg property. Some SoC suffer from a BUG where CBR(Core Base Register) address might be badly or never initialized by the Bootloader or reading it from co-processor registers, if the system boots from secondary CPU, results in invalid address. The CBR address is always the same on the SoC. Usage of this property is to give an address also in these broken configuration/bootloader. Signed-off-by:
Conor Dooley <conor.dooley@microchip.com> Reviewed-by:
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Christian Marangi authored
Rework the handling of the CBR address and cache it. This address doesn't change and can be cached instead of reading the register every time. This is in preparation of permitting to tweak the CBR address in DT with broken SoC or bootloader. bmips_cbr_addr is defined in setup.c for each arch to keep compatibility with legacy brcm47xx/brcm63xx and generic BMIPS target. Acked-by:
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Thomas Bogendoerfer authored
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- 21 Jun, 2024 12 commits
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Jiaxun Yang authored
Somehow those enablement bits were left over when we were adding initial Loongson-2K support. Set up basic information and select proper builtin DTB for Loongson-2K. Cc: stable@vger.kernel.org Signed-off-by:
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Jiaxun Yang authored
Some firmware implementations require restoring ra and sp to be passed as arguments. Passing them as necessary. Fixes: 68557c59 ("MIPS: Loongson64: Implement PM suspend for LEFI firmware") Signed-off-by:
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Jiaxun Yang authored
We should always use firmware's poweroff & reboot service if it's available as firmware may need to perform more task than platform's syscon etc. However _machine_restart & poweroff hooks are registered at low priority, which means platform reboot driver can override them. Register firmware based reboot/poweroff implementation with register_sys_off_handler with appropriate priority so that they will be prioritised. Remove _machine_halt hook as it's deemed to be unnecessary. Cc: stable@vger.kernel.org Signed-off-by:
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Jiaxun Yang authored
cpu_hwmon is unsupported on CPUs without loongson_chiptemp register and csr. Cc: stable@vger.kernel.org Signed-off-by:
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Jiaxun Yang authored
Some global register address variable may be missing on specific CPU type, test them before use them. Cc: stable@vger.kernel.org Signed-off-by:
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Jiaxun Yang authored
ISA node is required by Loongson64 platforms to initialize PIO support. Kernel will hang at boot without ISA node. Cc: stable@vger.kernel.org Signed-off-by:
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Jiaxun Yang authored
phy-mode should be rgmii-id to match hardware configuration. Also there should be a phy-handle to reference phy node. Fixes: f8a11425 ("MIPS: Loongson64: Add GMAC support for Loongson-2K1000") Cc: stable@vger.kernel.org Signed-off-by:
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Jiaxun Yang authored
The correct interrupt line for RTC is line 8 on liointc1. Fixes: e47084e1 ("MIPS: Loongson64: DTS: Add RTC support to Loongson-2K1000") Cc: stable@vger.kernel.org Signed-off-by:
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Jiaxun Yang authored
All internal liointc interrupts are high level triggered. Fixes: b1a79260 ("MIPS: Loongson64: DeviceTree for Loongson-2K1000") Cc: stable@vger.kernel.org Signed-off-by:
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Jiaxun Yang authored
Builtin DTBS should never contain memory node as memory is going to be managed by LEFI interface. Remove memory node to prevent confliction. Fixes: b1a79260 ("MIPS: Loongson64: DeviceTree for Loongson-2K1000") Cc: stable@vger.kernel.org Signed-off-by:
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Arnd Bergmann authored
This is almost compatible, but passing a negative offset should result in a EINVAL error, but on mips o32 compat mode would seek to a large 32-bit byte offset. Use compat_sys_lseek() to correctly sign-extend the argument. Signed-off-by:
Arnd Bergmann <arnd@arndb.de> Signed-off-by:
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Jiaxun Yang authored
Target register of mftc0 should be __res instead of $1, this is a leftover from old .insn code. Fixes: dd6d29a6 ("MIPS: Implement microMIPS MT ASE helpers") Cc: stable@vger.kernel.org Signed-off-by:
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- 19 Jun, 2024 2 commits
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Jeff Johnson authored
With ARCH=mips, make allmodconfig && make W=1 C=1 reports: WARNING: modpost: missing MODULE_DESCRIPTION() in arch/mips/crypto/poly1305-mips.o Add the missing invocation of the MODULE_DESCRIPTION() macro. Signed-off-by:
Jeff Johnson <quic_jjohnson@quicinc.com> Signed-off-by:
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Jiaxun Yang authored
Include linux/processor.h to fix build error: arch/mips/sgi-ip30/ip30-console.c: In function ‘prom_putchar’: arch/mips/sgi-ip30/ip30-console.c:21:17: error: implicit declaration of function ‘cpu_relax’ [-Werror=implicit-function-declaration] 21 | cpu_relax(); Cc: stable@vger.kernel.org Signed-off-by:
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- 13 Jun, 2024 1 commit
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Thomas Bogendoerfer authored
This reverts commit 277a0363. While fixing old boards with broken DTs, this change will break newer ones with correct gpio polarity annotation. Signed-off-by:
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- 11 Jun, 2024 9 commits
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Christian Marangi authored
It was discovered that some device have CBR address set to 0 causing kernel panic when arch_sync_dma_for_cpu_all is called. This was notice in situation where the system is booted from TP1 and BMIPS_GET_CBR() returns 0 instead of a valid address and !!(read_c0_brcm_cmt_local() & (1 << 31)); not failing. The current check whether RAC flush should be disabled or not are not enough hence lets check if CBR is a valid address or not. Fixes: ab327f8a ("mips: bmips: BCM6358: disable RAC flush for TP1") Signed-off-by:
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Martin Schiller authored
Commit 90c2d2eb ("MIPS: pci: lantiq: switch to using gpiod API") not only switched to the gpiod API, but also inverted / changed the polarity of the GPIO. According to the PCI specification, the RST# pin is an active-low signal. However, most of the device trees that have been widely used for a long time (mainly in the openWrt project) define this GPIO as active-high and the old driver code inverted the signal internally. Apparently there are actually boards where the reset gpio must be operated inverted. For this reason, we cannot use the GPIOD_OUT_LOW/HIGH flag for initialization. Instead, we must explicitly set the gpio to value 1 in order to take into account any "GPIO_ACTIVE_LOW" flag that may have been set. In order to remain compatible with all these existing device trees, we should therefore keep the logic as it was before the commit. Fixes: 90c2d2eb ("MIPS: pci: lantiq: switch to using gpiod API") Cc: stable@vger.kernel.org Signed-off-by:
Martin Schiller <ms@dev.tdt.de> Signed-off-by:
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Ilpo Järvinen authored
read_config_dword() contains strange condition checking ret for a number of values. The ret variable, however, is always zero because config_access() never returns anything else. Thus, the retry is always taken until number of tries is exceeded. The code looks like it wants to check *val instead of ret to see if the read gave an error response. Fixes: 73b4390f ("[MIPS] Routerboard 532: Support for base system") Signed-off-by:
Ilpo Järvinen <ilpo.jarvinen@linux.intel.com> Signed-off-by:
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Genjian Zhang authored
These functions are used in only one file. Made them static to fix the following build error: arch/mips/sgi-ip22/ip22-gio.c:249:6: error: no previous prototype for ‘ip22_gio_set_64bit’ [-Werror=missing-prototypes] arch/mips/sgi-ip22/ip22-gio.c:398:12: error: no previous prototype for ‘ip22_gio_init’ [-Werror=missing-prototypes] Reported-by:
k2ci <kernel-bot@kylinos.cn> Signed-off-by:
Genjian Zhang <zhanggenjian@kylinos.cn> Signed-off-by:
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Genjian Zhang authored
This fixes the following build warning: arch/mips/sgi-ip22/ip22-time.c:119:18: error: no previous prototype for ‘indy_8254timer_irq’ [-Werror=missing-prototypes] arch/mips/sgi-ip22/ip22-berr.c:89:6: error: no previous prototype for ‘ip22_be_interrupt’ [-Werror=missing-prototypes] arch/mips/sgi-ip22/ip22-berr.c:113:13: error: no previous prototype for ‘ip22_be_init’ [-Werror=missing-prototypes] Reported-by:
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Jiaxun Yang authored
Add various required properties to silent warnings: arch/mips/boot/dts/loongson/loongson64-2k1000.dtsi:116.16-297.5: Warning (interrupt_provider): /bus@10000000/pci@1a000000: '#interrupt-cells' found, but node is not an interrupt provider arch/mips/boot/dts/loongson/loongson64_2core_2k1000.dtb: Warning (interrupt_map): Failed prerequisite 'interrupt_provider' Signed-off-by:
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Jiaxun Yang authored
Add it to silent warning: arch/mips/boot/dts/loongson/ls7a-pch.dtsi:68.16-416.5: Warning (interrupt_provider): /bus@10000000/pci@1a000000: '#interrupt-cells' found, but node is not an interrupt provider arch/mips/boot/dts/loongson/loongson64g_4core_ls7a.dts:32.31-40.4: Warning (interrupt_provider): /bus@10000000/msi-controller@2ff00000: Missing '#interrupt-cells' in interrupt provider arch/mips/boot/dts/loongson/loongson64g_4core_ls7a.dtb: Warning (interrupt_map): Failed prerequisite 'interrupt_provider' Signed-off-by:
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Jiaxun Yang authored
dma.c defined function plat_swiotlb_setup, which is declared in bootinfo.h. Fixes warning: arch/mips/loongson64/dma.c:25:13: warning: no previous prototype for ‘plat_swiotlb_setup’ [-Wmissing-prototypes] 25 | void __init plat_swiotlb_setup(void) | ^~~~~~~~~~~~~~~~~~ Signed-off-by:Philippe Mathieu-Daudé <philmd@linaro.org> Signed-off-by:
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Jiaxun Yang authored
Declear prototype for kvm_init_loongson_ipi in interrupt.h. Fix warning: arch/mips/kvm/loongson_ipi.c:190:6: warning: no previous prototype for ‘kvm_init_loongson_ipi’ [-Wmissing-prototypes] 190 | void kvm_init_loongson_ipi(struct kvm *kvm) | ^~~~~~~~~~~~~~~~~~~~~ Fixes: f21db309 ("KVM: MIPS: Add Loongson-3 Virtual IPI interrupt support") Signed-off-by:
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