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bc1099d2b2
linux/arch/arm
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Benjamin Herrenschmidt bc1099d2b2 fsi/fsi-master-gpio: Add "no-gpio-delays" option 
This adds support for an optional device-tree property that
makes the driver skip all the delays around clocking the
GPIOs and set it in the device-tree of common POWER9 based
OpenPower platforms.

This useful on chips like the AST2500 where the GPIO block is
running at a fairly low clock frequency (25Mhz typically). In
this case, the delays are unnecessary and due to the low
precision of the timers, actually quite harmful in terms of
performance.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Reviewed-by: Christopher Bostic <cbostic@linux.vnet.ibm.com>
Tested-by: Joel Stanley <joel@jms.id.au>
2018-06-12 14:04:41 +10:00
..
boot fsi/fsi-master-gpio: Add "no-gpio-delays" option 2018-06-12 14:04:41 +10:00
common ARM: SoC platform updates 2018-06-11 17:49:09 -07:00
configs Renesas ARM Based SoC Defconfig Updates for v4.18 2018-05-26 12:37:07 -07:00
crypto crypto: clarify licensing of OpenSSL asm code 2018-05-31 00:13:44 +08:00
firmware
include ARM: SoC platform updates 2018-06-11 17:49:09 -07:00
kernel Merge branch 'core-rseq-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2018-06-10 10:17:09 -07:00
kvm Merge branch 'for-linus' of git://git.armlinux.org.uk/~rmk/linux-arm 2018-06-06 13:49:25 -07:00
lib ARM: 8772/1: kprobes: Prohibit kprobes on get_user functions 2018-05-19 11:35:56 +01:00
mach-actions
mach-alpine
mach-artpec
mach-asm9260
mach-aspeed
mach-at91
mach-axxia arch: define the ARCH_DMA_ADDR_T_64BIT config symbol in lib/Kconfig 2018-05-09 06:57:04 +02:00
mach-bcm arch: define the ARCH_DMA_ADDR_T_64BIT config symbol in lib/Kconfig 2018-05-09 06:57:04 +02:00
mach-berlin ARM: berlin: switch to SPDX license identifier 2018-05-24 14:49:09 +08:00
mach-clps711x
mach-cns3xxx
mach-davinci ARM: SoC platform updates 2018-06-11 17:49:09 -07:00
mach-digicolor
mach-dove
mach-ebsa110
mach-efm32
mach-ep93xx sound updates for 4.18 2018-06-06 09:08:38 -07:00
mach-exynos ARM: exynos: Remove unused soc_is_exynos{4,5} 2018-05-13 14:07:03 +02:00
mach-footbridge
mach-gemini
mach-highbank arch: define the ARCH_DMA_ADDR_T_64BIT config symbol in lib/Kconfig 2018-05-09 06:57:04 +02:00
mach-hisi
mach-imx regulator: gpio: Revert 2018-06-07 14:23:08 +01:00
mach-integrator
mach-iop13xx
mach-iop32x
mach-iop33x
mach-ixp4xx ARM: Fix i2c-gpio GPIO descriptor tables 2018-05-26 11:44:00 -07:00
mach-keystone ARM: keystone: fix platform_domain_notifier array overrun 2018-05-14 09:24:29 -07:00
mach-ks8695
mach-lpc18xx
mach-lpc32xx
mach-mediatek
mach-meson ARM: meson: merge Kconfig symbol MACH_MESON8B into MACH_MESON8 2018-05-23 10:08:13 -07:00
mach-mmp regulator: gpio: Revert 2018-06-07 14:23:08 +01:00
mach-moxart
mach-mv78xx0
mach-mvebu
mach-mxs
mach-netx
mach-nomadik
mach-npcm arm: npcm: enable L2 cache in NPCM7xx architecture 2018-04-10 16:40:03 +02:00
mach-nspire ARM: nspire: Remove unneeded nspire_map_io() 2018-03-07 16:07:35 +01:00
mach-omap1 ARM: SoC platform updates 2018-06-11 17:49:09 -07:00
mach-omap2 ARM: SoC platform updates 2018-06-11 17:49:09 -07:00
mach-orion5x
mach-oxnas
mach-picoxcell
mach-prima2
mach-pxa ARM: SoC platform updates 2018-06-11 17:49:09 -07:00
mach-qcom
mach-realview
mach-rockchip arch: define the ARCH_DMA_ADDR_T_64BIT config symbol in lib/Kconfig 2018-05-09 06:57:04 +02:00
mach-rpc proc: introduce proc_create_single{,_data} 2018-05-16 07:23:35 +02:00
mach-s3c24xx Samsung mach/soc changes for v4.18 2018-05-14 13:52:23 -07:00
mach-s3c64xx regulator: gpio: Revert 2018-06-07 14:23:08 +01:00
mach-s5pv210
mach-sa1100 regulator: gpio: Revert 2018-06-07 14:23:08 +01:00
mach-shmobile ARM: SoC platform updates 2018-06-11 17:49:09 -07:00
mach-socfpga ARM: socfpga: PM: Drop useless check for PM_SUSPEND_STANDBY 2018-03-07 16:08:20 +01:00
mach-spear
mach-sti
mach-stm32 ARM: stm32: Don't select DMA unconditionally on STM32MP157C 2018-05-25 15:26:38 -07:00
mach-sunxi ARM: sun8i: smp: Add support for A83T 2018-05-08 15:00:20 +02:00
mach-tango
mach-tegra ARM: SoC platform updates 2018-06-11 17:49:09 -07:00
mach-u300
mach-uniphier
mach-ux500 ARM: ux500: Cut down Kconfig options 2018-05-04 11:02:52 +02:00
mach-versatile
mach-vexpress
mach-vt8500
mach-w90x900
mach-zx
mach-zynq
mm ARM: SoC platform updates 2018-06-11 17:49:09 -07:00
net bpf, arm32: fix inconsistent naming about emit_a32_lsr_{r64,i64} 2018-06-05 10:54:53 +02:00
nwfpe
oprofile
plat-iop
plat-omap ARM: OMAP2+: Drop unused pm-noop 2018-04-16 10:22:40 -07:00
plat-orion
plat-pxa
plat-samsung ARM: exynos: Remove static mapping of SCU SFR 2018-05-13 14:06:55 +02:00
plat-versatile
probes ARM: 8770/1: kprobes: Prohibit probing on optimized_callback 2018-05-19 11:35:56 +01:00
tools arm: Wire up restartable sequences system call 2018-06-06 11:58:31 +02:00
vdso
vfp Merge branch 'siginfo-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace 2018-06-04 15:23:48 -07:00
xen xen/privcmd: add IOCTL_PRIVCMD_MMAP_RESOURCE 2018-05-14 15:25:37 +02:00
Kconfig ARM: SoC platform updates 2018-06-11 17:49:09 -07:00
Kconfig-nommu
Kconfig.debug ARM: debug-ll: Add support for r8a77470 2018-04-16 16:01:25 +02:00
Makefile ARM: SoC platform updates 2018-06-11 17:49:09 -07:00