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twx-linux/arch/arm/include/asm
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Christophe Leroy 7b61212f2a gpiolib: Get rid of ARCH_NR_GPIOS 
Since commit 14e85c0e69d5 ("gpio: remove gpio_descs global array")
there is no limitation on the number of GPIOs that can be allocated
in the system since the allocation is fully dynamic.

ARCH_NR_GPIOS is today only used in order to provide downwards
gpiobase allocation from that value, while static allocation is
performed upwards from 0. However that has the disadvantage of
limiting the number of GPIOs that can be registered in the system.

To overcome this limitation without requiring each and every
platform to provide its 'best-guess' maximum number, rework the
allocation to allocate upwards, allowing approx 2 millions of
GPIOs.

In order to still allow static allocation for legacy drivers, define
GPIO_DYNAMIC_BASE with the value 512 as the start for dynamic
allocation. The 512 value is chosen because it is the end of
the current default range so all current static allocations are
expected to be below that value. Of course that's just a rough
estimate based on the default value, but assuming static
allocations come first, even if there are more static allocations
it should fit under the 512 value.

In the future, it is expected that all static allocations go away
and then dynamic allocation will be patched to start at 0.

Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
2022-10-17 11:03:09 +02:00
..
hardware ARM: footbridge: remove custom DMA address handling 2022-09-15 15:59:16 +02:00
mach ARM: footbridge: move isa-dma support into footbridge 2022-09-09 17:14:34 +02:00
vdso vdso/treewide: Add vdso_data pointer argument to __arch_get_hw_counter() 2020-08-06 10:57:30 +02:00
xen arm/xen: Introduce xen_setup_dma_ops() 2022-06-06 08:54:33 +02:00
arch_gicv3.h irqchip/gic-v3: Refactor ISB + EOIR at ack time 2022-05-15 16:38:25 +01:00
arch_timer.h clocksource/drivers/arm_arch_timer: Drop unnecessary ISB on CVAL programming 2021-10-17 21:47:44 +02:00
archrandom.h random: remove CONFIG_ARCH_RANDOM 2022-07-18 15:03:37 +02:00
arm-cci.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 234 2019-06-19 17:09:07 +02:00
asm-offsets.h
assembler.h ARM: 9195/1: entry: avoid explicit literal loads 2022-05-20 12:32:32 +01:00
atomic.h locking/atomic: arm: move to ARCH_ATOMIC 2021-05-26 13:20:50 +02:00
auxvec.h
barrier.h ARM: avoid Cortex-A9 livelock on tight dmb loops 2019-02-01 22:05:50 +00:00
bitops.h arm: align find_bit declarations with generic kernel 2022-07-14 15:21:43 -07:00
bitrev.h
bL_switcher.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
bug.h arm: print alloc free paths for address in registers 2021-05-07 00:26:34 -07:00
bugs.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
cache.h treewide: Convert macro and uses of __section(foo) to __section("foo") 2020-10-25 14:51:49 -07:00
cacheflush.h ARM development updates for 5.18: 2022-03-23 17:35:57 -07:00
cachetype.h
checksum.h arm: propagate the calling convention changes down to csum_partial_copy_from_user() 2020-08-20 15:45:16 -04:00
clocksource.h arm: Introduce asm/vdso/clocksource.h 2020-03-21 15:23:54 +01:00
cmpxchg.h locking/atomic: arm: move to ARCH_ATOMIC 2021-05-26 13:20:50 +02:00
compiler.h
cp15.h arm: vdso: Enable arm to use common headers 2020-03-21 15:24:03 +01:00
cpu.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
cpufeature.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
cpuidle.h arm64 updates for 5.14 2021-06-28 14:04:24 -07:00
cputype.h Merge branches 'misc', 'sa1100-for-next' and 'spectre' into for-linus 2019-01-02 10:37:05 +00:00
cti.h
current.h ARM: make get_current() and __my_cpu_offset() __always_inline 2022-01-31 16:06:35 +01:00
dcc.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 284 2019-06-05 17:36:37 +02:00
delay.h
device.h ARM/dma-mapping: remove the dma_coherent member of struct dev_archdata 2022-10-06 14:31:08 +02:00
div64.h ARM: 9118/1: div64: Remove always-true __div64_const32_is_OK() duplicate 2021-08-20 11:39:28 +01:00
dma-iommu.h dma-mapping: move dma-debug.h to kernel/dma/ 2020-10-06 07:07:05 +02:00
dma.h ARM: footbridge: remove custom DMA address handling 2022-09-15 15:59:16 +02:00
dmi.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
domain.h ARM: 9211/1: domain: drop modify_domain() 2022-07-06 22:44:49 +01:00
ecard.h
edac.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 201 2019-05-30 11:29:52 -07:00
efi.h efi/arm: libstub: move ARM specific code out of generic routines 2022-09-27 13:26:16 +02:00
elf.h ARM: module: implement support for PC-relative group relocations 2021-12-06 12:49:16 +01:00
exception.h
fb.h
fiq.h
firmware.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
fixmap.h ARM updates for 5.11: 2020-12-22 13:34:27 -08:00
floppy.h floppy: split the base port from the register in I/O accesses 2020-05-12 19:34:52 +03:00
fncpy.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 333 2019-06-05 17:37:06 +02:00
fpstate.h ARM: 9228/1: vfp: kill vfp_flush/release_thread() 2022-08-31 14:50:08 +01:00
ftrace.h ARM: 9184/1: return_address: disable again for CONFIG_ARM_UNWIND=y 2022-03-07 11:43:12 +00:00
futex.h ARM: futex: Address build warning 2020-05-07 00:41:47 +02:00
glue-cache.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
glue-df.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
glue-pf.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
glue-proc.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
glue.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
gpio.h gpiolib: Get rid of ARCH_NR_GPIOS 2022-10-17 11:03:09 +02:00
hardirq.h ARM: irqstat: Get rid of duplicated declaration 2020-11-23 10:31:05 +01:00
highmem.h ARM: highmem: Fix cache_is_vivt() reference 2020-12-04 23:35:34 +01:00
hugetlb-3level.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 333 2019-06-05 17:37:06 +02:00
hugetlb.h mm/hugetlb: define a generic fallback for arch_clear_hugepage_flags() 2020-06-03 20:09:46 -07:00
hw_breakpoint.h ARM: 8927/1: ARM/hw_breakpoint: add more ARMv8 debug architecture versions support 2019-11-15 22:21:08 +00:00
hw_irq.h
hwcap.h
hypervisor.h arm/arm64: Probe for the presence of KVM hypervisor 2021-03-31 09:16:55 +01:00
ide.h
idmap.h treewide: Convert macro and uses of __section(foo) to __section("foo") 2020-10-25 14:51:49 -07:00
insn.h ARM: 9176/1: avoid literal references in inline assembly 2022-01-06 12:58:58 +00:00
io.h ARM: mm: kill unused runtime hook arch_iounmap() 2022-06-27 12:21:09 +01:00
irq_work.h ARM: 9217/1: add definition of arch_irq_work_raise() 2022-07-28 15:09:15 +01:00
irq.h ARM: remove old-style irq entry 2021-12-06 12:49:11 +01:00
irqflags.h
jump_label.h
kasan_def.h ARM: 9015/2: Define the virtual space of KASan's shadow region 2020-10-27 12:11:08 +00:00
kasan.h ARM: 9016/2: Initialize the mapping of KASan shadow memory 2020-10-27 12:11:10 +00:00
Kbuild local64.h: make <asm/local64.h> mandatory 2020-12-29 15:36:49 -08:00
kexec-internal.h ARM: kexec: fix oops after TLB are invalidated 2021-02-05 10:23:29 +00:00
kexec.h ARM: 9060/1: kexec: Remove unused kexec_reinit callback 2021-03-09 10:25:35 +00:00
kfence.h ARM: 9166/1: Support KFENCE for ARM 2021-12-17 11:34:38 +00:00
kgdb.h ARM: 8764/1: kgdb: fix NUMREGBYTES so that gdb_regs[] is the correct size 2018-05-19 11:53:46 +01:00
kprobes.h ARM: 9019/1: kprobes: Avoid fortify_panic() when copying optprobe template 2020-10-27 12:11:51 +00:00
krait-l2-accessors.h ARM: Add Krait L2 register accessor functions 2018-10-17 13:14:33 -07:00
linkage.h
mc146818rtc.h
mcpm.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
mcs_spinlock.h
memblock.h
memory.h ARM: footbridge: remove custom DMA address handling 2022-09-15 15:59:16 +02:00
mmu_context.h ARM: mm: make vmalloc_seq handling SMP safe 2022-01-25 09:53:52 +01:00
mmu.h ARM: mm: make vmalloc_seq handling SMP safe 2022-01-25 09:53:52 +01:00
module.h ARM: 9204/2: module: Add all unwind tables when load module 2022-05-20 12:34:55 +01:00
module.lds.h kbuild: preprocess module linker script 2020-09-25 00:36:41 +09:00
mpu.h
mtd-xip.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
neon.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
nwflash.h misc: move FLASH_MINOR into miscdevice.h and fix conflicts 2020-03-18 12:27:04 +01:00
opcodes-sec.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 174 2019-05-30 11:26:41 -07:00
opcodes-virt.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 1 2019-05-21 11:28:39 +02:00
opcodes.h ARM: 9145/1: patch: fix BE32 compilation 2021-10-25 13:12:36 +01:00
outercache.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 333 2019-06-05 17:37:06 +02:00
page-nommu.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
page.h ARM: mm: make vmalloc_seq handling SMP safe 2022-01-25 09:53:52 +01:00
paravirt_api_clock.h sched/headers: ARM needs asm/paravirt_api_clock.h too 2022-03-22 08:53:10 +01:00
paravirt.h x86/paravirt: Switch time pvops functions to use static_call() 2021-03-11 16:17:52 +01:00
patch.h
pci.h PCI: Remove pci_get_legacy_ide_irq() and asm-generic/pci.h 2022-07-22 17:23:45 -05:00
percpu.h ARM: make get_current() and __my_cpu_offset() __always_inline 2022-01-31 16:06:35 +01:00
perf_event.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
pgalloc.h mm/thp: define default pmd_pgtable() 2021-07-01 11:06:03 -07:00
pgtable-2level-hwdef.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
pgtable-2level-types.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 333 2019-06-05 17:37:06 +02:00
pgtable-2level.h arch: Add pmd_pfn() where it is missing 2022-03-21 12:59:02 -04:00
pgtable-3level-hwdef.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 333 2019-06-05 17:37:06 +02:00
pgtable-3level-types.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 333 2019-06-05 17:37:06 +02:00
pgtable-3level.h mm: rename pud_page_vaddr to pud_pgtable and make it return pmd_t * 2021-07-08 11:48:22 -07:00
pgtable-hwdef.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
pgtable-nommu.h mm: consolidate pte_index() and pte_offset_*() definitions 2020-06-09 09:39:14 -07:00
pgtable.h arm/mm: enable ARCH_HAS_VM_GET_PAGE_PROT 2022-07-17 17:14:41 -07:00
probes.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 174 2019-05-30 11:26:41 -07:00
proc-fns.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
processor.h kernel: exit: cleanup release_thread() 2022-09-11 21:55:07 -07:00
procinfo.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
prom.h ARM: 9011/1: centralize phys-to-virt conversion of DT/ATAGS address 2020-10-27 12:10:59 +00:00
psci.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 174 2019-05-30 11:26:41 -07:00
ptdump.h arm: dump: no need to check return value of debugfs_create functions 2019-06-03 15:49:07 +02:00
ptrace.h ARM: 9214/1: alignment: advance IT state after emulating Thumb instruction 2022-07-06 22:44:49 +01:00
seccomp.h arm: Enable seccomp architecture tracking 2020-11-20 11:16:34 -08:00
sections.h arm: Remove HYP/Stage-2 page-table support 2020-03-24 10:56:05 +00:00
secure_cntvoff.h
set_memory.h ARM: 9164/1: mm: Provide set_memory_valid() 2021-12-17 11:34:36 +00:00
setup.h ARM: 9147/1: add printf format attribute to early_print() 2021-10-25 13:12:37 +01:00
shmparam.h
signal.h signal: clear non-uapi flag bits when passing/returning sa_flags 2020-11-23 10:31:05 -06:00
smp_plat.h
smp_scu.h
smp_twd.h ARM: 8822/1: smp_twd: Remove legacy TWD registration 2019-02-01 21:44:10 +00:00
smp.h ARM: remove some dead code 2021-12-03 15:11:31 +01:00
sparsemem.h
spectre.h ARM: Spectre-BHB: provide empty stub for non-config 2022-03-11 12:42:49 -08:00
spinlock_types.h locking: Allow to include asm/spinlock_types.h from linux/spinlock_types_raw.h 2021-12-07 15:14:12 +01:00
spinlock.h locking: Fix typos in comments 2021-03-22 02:45:52 +01:00
stackprotector.h gcc-plugins: arm-ssp: Prepare for THREAD_INFO_IN_TASK support 2021-09-27 16:54:01 +02:00
stacktrace.h ARM: 9234/1: stacktrace: Avoid duplicate saving of exception PC value 2022-10-04 11:09:47 +01:00
string.h ARM: 9014/2: Replace string mem* functions for KASan 2020-10-27 12:11:06 +00:00
suspend.h ARM: 8847/1: pm: fix HYP/SVC mode mismatch when MCPM is used 2019-02-26 11:32:54 +00:00
swab.h
switch_to.h ARM development updates for 5.18: 2022-03-23 17:35:57 -07:00
sync_bitops.h locking/atomic: arm: move to ARCH_ATOMIC 2021-05-26 13:20:50 +02:00
syscall.h arch: remove unused function syscall_set_arguments() 2021-09-14 16:06:20 +02:00
system_info.h
system_misc.h ARM: 9096/1: Remove arm_pm_restart() 2021-06-13 18:16:48 +01:00
tcm.h treewide: Convert macro and uses of __section(foo) to __section("foo") 2020-10-25 14:51:49 -07:00
therm.h
thread_info.h ARM: implement THREAD_INFO_IN_TASK for uniprocessor systems 2021-12-06 12:49:17 +01:00
thread_notify.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
timex.h arm: use fallback for random_get_entropy() instead of zero 2022-05-13 23:59:23 +02:00
tlb.h mm: account PMD tables like PTE tables 2020-10-13 18:38:31 -07:00
tlbflush.h mm: update legacy flush_tlb_* to use vma 2021-06-29 10:53:52 -07:00
tls.h ARM: smp: elide HWCAP_TLS checks or __entry_task updates on SMP+v6 2022-01-25 09:53:52 +01:00
topology.h arch_topology: Remove unused topology_set_thermal_pressure() and related 2021-11-23 15:10:26 +05:30
traps.h arm/asm: add loglvl to c_backtrace() 2020-06-09 09:39:10 -07:00
uaccess-asm.h ARM: 9113/1: uaccess: remove set_fs() implementation 2021-08-20 11:39:27 +01:00
uaccess.h uaccess: generalize access_ok() 2022-02-25 09:36:05 +01:00
ucontext.h ARM: ep93xx: remove MaverickCrunch support 2021-08-04 13:30:04 +02:00
unified.h ARM: 9116/1: unified: Remove check for gcc < 4 2021-08-20 11:39:28 +01:00
unistd.h clone3-v5.3 2019-07-11 10:09:44 -07:00
unwind.h ARM: 9204/2: module: Add all unwind tables when load module 2022-05-20 12:34:55 +01:00
uprobes.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
user.h asm/user.h: killed unused macros 2022-01-30 21:17:00 -05:00
v7m.h irqchip: nvic: Use GENERIC_IRQ_MULTI_HANDLER 2021-12-06 12:49:16 +01:00
vdso_datapage.h ARM: 8930/1: Add support for generic vDSO 2019-11-15 22:21:12 +00:00
vdso.h
vermagic.h arch: split MODULE_ARCH_VERMAGIC definitions out to <asm/vermagic.h> 2020-04-23 10:50:26 +09:00
vfp.h ARM: 8991/1: use VFP assembler mnemonics if available 2020-07-21 16:33:39 +01:00
vfpmacros.h ARM: 8991/1: use VFP assembler mnemonics if available 2020-07-21 16:33:39 +01:00
vga.h
virt.h arm: Remove the ability to set HYP vectors outside of the decompressor 2020-03-24 10:56:05 +00:00
vmalloc.h mm/vmalloc: Add empty <asm/vmalloc.h> headers and use them from <linux/vmalloc.h> 2019-12-10 10:12:55 +01:00
vmlinux.lds.h ARM: Do not use NOCROSSREFS directive with ld.lld 2022-03-09 14:14:16 -08:00
word-at-a-time.h
xor.h lib/xor: make xor prototypes more friendly to compiler vectorization 2022-02-11 20:39:39 +11:00