linux_dsm_epyc7002/arch/arm
Dave Gerlach d279f7a7e9 ARM: dts: am437x-sk-evm: Reduce i2c0 bus speed for tps65218
Based on the latest timing specifications for the TPS65218 from the data
sheet, http://www.ti.com/lit/ds/symlink/tps65218.pdf, document SLDS206
from November 2014, we must change the i2c bus speed to better fit within
the minimum high SCL time required for proper i2c transfer.

When running at 400khz, measurements show that SCL spends
0.8125 uS/1.666 uS high/low which violates the requirement for minimum
high period of SCL provided in datasheet Table 7.6 which is 1 uS.
Switching to 100khz gives us 5 uS/5 uS high/low which both fall above
the minimum given values for 100 khz, 4.0 uS/4.7 uS high/low.

Without this patch occasionally a voltage set operation from the kernel
will appear to have worked but the actual voltage reflected on the PMIC
will not have updated, causing problems especially with cpufreq that may
update to a higher OPP without actually raising the voltage on DCDC2,
leading to a hang.

Signed-off-by: Dave Gerlach <d-gerlach@ti.com>
Signed-off-by: Nishanth Menon <nm@ti.com>
Signed-off-by: Franklin S Cooper Jr <fcooper@ti.com>
Signed-off-by: Aparna Balasubramanian <aparnab@ti.com>
Signed-off-by: Keerthy <j-keerthy@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
2016-06-17 02:59:04 -07:00
..
boot ARM: dts: am437x-sk-evm: Reduce i2c0 bus speed for tps65218 2016-06-17 02:59:04 -07:00
common Merge branch 'for-linus' of git://ftp.arm.linux.org.uk/~rmk/linux-arm 2016-03-19 16:31:54 -07:00
configs ARM: SoC defconfig updates for v4.6 2016-03-20 15:32:14 -07:00
crypto Merge branch 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6 2016-03-17 11:22:54 -07:00
firmware
include arch, ftrace: for KASAN put hard/soft IRQ entries into separate sections 2016-03-25 16:37:42 -07:00
kernel arm: Use _rcuidle for smp_cross_call() tracepoints 2016-06-14 16:29:31 -07:00
kvm KVM: arm/arm64: disable preemption when calling smp_call_function_many 2016-03-21 10:45:22 +01:00
lib
mach-alpine
mach-artpec
mach-asm9260
mach-at91
mach-axxia
mach-bcm
mach-berlin
mach-clps711x
mach-cns3xxx ARM: SoC cleanups for v4.6 2016-03-20 14:37:22 -07:00
mach-davinci ARM: SoC platform updates for v4.6 2016-03-20 14:57:08 -07:00
mach-digicolor
mach-dove
mach-ebsa110
mach-efm32
mach-ep93xx
mach-exynos ARM: SoC platform updates for v4.6 2016-03-20 14:57:08 -07:00
mach-footbridge
mach-gemini
mach-highbank
mach-hisi
mach-imx ARM: SoC platform updates for v4.6 2016-03-20 14:57:08 -07:00
mach-integrator
mach-iop13xx
mach-iop32x
mach-iop33x
mach-ixp4xx This is the bulk of GPIO changes for kernel v4.6: 2016-03-17 21:05:32 -07:00
mach-keystone ARM: DT updates for v4.6 2016-03-20 15:15:48 -07:00
mach-ks8695 ARM: SoC non-urgent fixes for v4.6 2016-03-20 14:26:57 -07:00
mach-lpc18xx
mach-lpc32xx ARM: SoC cleanups for v4.6 2016-03-20 14:37:22 -07:00
mach-mediatek ARM: DT updates for v4.6 2016-03-20 15:15:48 -07:00
mach-meson
mach-mmp
mach-moxart
mach-mv78xx0 ARM: SoC cleanups for v4.6 2016-03-20 14:37:22 -07:00
mach-mvebu The clk changes for this release cycle are mostly dominated by 2016-03-23 06:06:45 -07:00
mach-mxs
mach-netx ARM: SoC cleanups for v4.6 2016-03-20 14:37:22 -07:00
mach-nomadik
mach-nspire ARM: SoC cleanups for v4.6 2016-03-20 14:37:22 -07:00
mach-omap1 ARM: OMAP1: fix ams-delta FIQ handler to work with sparse IRQ 2016-06-17 02:37:36 -07:00
mach-omap2 ARM: OMAP2+: timer: add probe for clocksources 2016-06-17 02:46:45 -07:00
mach-orion5x ARM: SoC cleanups for v4.6 2016-03-20 14:37:22 -07:00
mach-picoxcell
mach-prima2 ARM: SoC cleanups for v4.6 2016-03-20 14:37:22 -07:00
mach-pxa ARM: SoC platform updates for v4.6 2016-03-20 14:57:08 -07:00
mach-qcom
mach-realview
mach-rockchip
mach-rpc
mach-s3c24xx ARM: SoC 64-bit changes for v4.6 2016-03-20 15:08:45 -07:00
mach-s3c64xx ARM: SoC platform updates for v4.6 2016-03-20 14:57:08 -07:00
mach-s5pv210
mach-sa1100 Merge branch 'for-linus' of git://ftp.arm.linux.org.uk/~rmk/linux-arm 2016-03-19 16:31:54 -07:00
mach-shmobile The clk changes for this release cycle are mostly dominated by 2016-03-23 06:06:45 -07:00
mach-socfpga ARM: SoC non-urgent fixes for v4.6 2016-03-20 14:26:57 -07:00
mach-spear
mach-sti
mach-stm32
mach-sunxi
mach-tango
mach-tegra
mach-u300
mach-uniphier ARM: uniphier: rework SMP code to support new System Bus binding 2016-03-18 17:36:37 +01:00
mach-ux500 ARM: SoC cleanups for v4.6 2016-03-20 14:37:22 -07:00
mach-versatile
mach-vexpress
mach-vt8500
mach-w90x900 Merge branch 'for-linus' of git://ftp.arm.linux.org.uk/~rmk/linux-arm 2016-03-19 16:31:54 -07:00
mach-zx
mach-zynq ARM: SoC platform updates for v4.6 2016-03-20 14:57:08 -07:00
mm Merge branch 'for-linus' of git://ftp.arm.linux.org.uk/~rmk/linux-arm 2016-03-19 16:31:54 -07:00
net
nwfpe
oprofile
plat-iop
plat-omap
plat-orion Merge branch 'for-linus' of git://ftp.arm.linux.org.uk/~rmk/linux-arm 2016-03-19 16:31:54 -07:00
plat-pxa
plat-samsung MTD updates for v4.6 2016-03-24 19:57:15 -07:00
plat-versatile
probes
tools
vdso
vfp
xen
Kconfig ARM: SoC platform updates for v4.6 2016-03-20 14:57:08 -07:00
Kconfig-nommu
Kconfig.debug
Makefile ARM: SoC platform updates for v4.6 2016-03-20 14:57:08 -07:00