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662a958638
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Heiko Stübner 662a958638 PM / AVS: rockchip-io: add driver handling Rockchip io domains 
IO domain voltages on some Rockchip SoCs are variable but need to be
kept in sync between the regulators and the SoC using a special
register.

A specific example using rk3288:
- If the regulator hooked up to a pin like SDMMC0_VDD is 3.3V then
  bit 7 of GRF_IO_VSEL needs to be 0.  If the regulator hooked up to
  that same pin is 1.8V then bit 7 of GRF_IO_VSEL needs to be 1.

Said another way, this driver simply handles keeping bits in the SoC's
general register file (GRF) in sync with the actual value of a voltage
hooked up to the pins.

Note that this driver specifically doesn't include:
- any logic for deciding what voltage we should set regulators to
- any logic for deciding whether regulators (or internal SoC blocks)
  should have power or not have power

If there were some other software that had the smarts of making
decisions about regulators, it would work in conjunction with this
driver.  When that other software adjusted a regulator's voltage then
this driver would handle telling the SoC about it.  A good example is
vqmmc for SD.  In that case the dw_mmc driver simply is told about a
regulator.  It changes the regulator between 3.3V and 1.8V at the
right time.  This driver notices the change and makes sure that the
SoC is on the same page.

Signed-off-by: Heiko Stübner <heiko@sntech.de>
Signed-off-by: Doug Anderson <dianders@chromium.org>
Reviewed-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
[khilman: fix compiler warnings]
Signed-off-by: Kevin Hilman <khilman@linaro.org>
2014-09-25 09:57:23 -07:00
..
accessibility
acpi More ACPI and power management updates for 3.17-rc1 2014-08-14 18:13:46 -06:00
amba
ata Merge branch 'akpm' (patchbomb from Andrew Morton) 2014-08-06 21:14:42 -07:00
atm Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2014-08-13 18:27:40 -06:00
auxdisplay
base Merge branch 'akpm' (patchbomb from Andrew Morton) 2014-08-06 21:14:42 -07:00
bcma bcma: use NS prefix for names of Northstar specific cores 2014-07-31 13:45:32 -04:00
block PCI changes for the v3.17 merge window (part 2): 2014-08-14 18:10:33 -06:00
bluetooth Bluetooth: Fix crash in the Marvell driver initialization codepath 2014-07-31 01:07:28 +02:00
bus ARM: SoC driver changes for 3.17 2014-08-08 11:34:32 -07:00
cdrom
char virtio: rng: add derating factor for use by hwrng core 2014-08-15 10:26:01 +05:30
clk ARM: SoC platform changes for 3.17 2014-08-08 11:14:29 -07:00
clocksource ARM: SoC platform changes for 3.17 2014-08-08 11:14:29 -07:00
connector
cpufreq More ACPI and power management updates for 3.17-rc1 2014-08-14 18:13:46 -06:00
cpuidle More ACPI and power management updates for 3.17-rc1 2014-08-14 18:13:46 -06:00
crypto PCI changes for the v3.17 merge window (part 2): 2014-08-14 18:10:33 -06:00
dca
devfreq
dio
dma Merge branch 'for-linus' of git://git.infradead.org/users/vkoul/slave-dma 2014-08-11 07:14:01 -07:00
dma-buf
edac Merge branch 'linux_next' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-edac 2014-08-15 17:56:45 -06:00
eisa
extcon
firewire Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next 2014-08-06 09:38:14 -07:00
firmware kexec: support kexec/kdump on EFI systems 2014-08-08 15:57:33 -07:00
fmc
gpio This is the bulk of GPIO changes for the v3.17 development 2014-08-08 18:00:35 -07:00
gpu Merge branch 'drm-fixes' of git://people.freedesktop.org/~airlied/linux 2014-08-15 17:57:49 -06:00
hid Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input 2014-08-15 18:16:28 -06:00
hsi HSI changes for the v3.17 series 2014-08-06 20:06:14 -07:00
hv Char / Misc driver patches for 3.17-rc1 2014-08-04 17:32:24 -07:00
hwmon Several bug fixes in various drivers, plus a minor cleanup 2014-08-14 09:55:13 -06:00
hwspinlock
i2c Merge branch 'i2c/for-3.17' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux 2014-08-09 09:15:07 -07:00
ide ide: use module_platform_driver() 2014-08-05 21:16:46 -07:00
idle intel_idle: Broadwell support 2014-08-15 17:06:40 -04:00
iio Staging driver patches for 3.17-rc1 2014-08-04 18:36:12 -07:00
infiniband PCI changes for the v3.17 merge window (part 2): 2014-08-14 18:10:33 -06:00
input Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input 2014-08-15 18:16:28 -06:00
iommu ARM: SoC cleanups for 3.17 2014-08-08 11:00:26 -07:00
ipack
irqchip ARM: SoC platform changes for 3.17 2014-08-08 11:14:29 -07:00
isdn net: filter: split 'struct sk_filter' into socket and bpf parts 2014-08-02 15:03:58 -07:00
leds ARM: SoC driver changes for 3.17 2014-08-08 11:34:32 -07:00
lguest mm/vmalloc.c: clean up map_vm_area third argument 2014-08-06 18:01:19 -07:00
macintosh == Changes to existing drivers == 2014-08-07 17:23:16 -07:00
mailbox
mcb
md . Allow the thin target to paired with any size external origin; also 2014-08-14 09:17:56 -06:00
media media: use pci_zalloc_consistent 2014-08-08 15:57:28 -07:00
memory
memstick
message
mfd drivers/mfd/rtsx_usb.c: export device table 2014-08-14 10:56:15 -06:00
misc ARM: SoC driver changes for 3.17 2014-08-08 11:34:32 -07:00
mmc PCI changes for the v3.17 merge window (part 2): 2014-08-14 18:10:33 -06:00
mtd No significant changes, mostly small fixes here and there. The more important 2014-08-13 17:42:11 -06:00
net PCI changes for the v3.17 merge window (part 2): 2014-08-14 18:10:33 -06:00
nfc
ntb
nubus
of The branch contains the following device tree changes the v3.17 merge 2014-08-14 09:53:39 -06:00
oprofile
parisc
parport drivers/parport/parport_ip32.c: use PTR_ERR_OR_ZERO 2014-08-08 15:57:25 -07:00
pci PCI changes for the v3.17 merge window (part 2): 2014-08-14 18:10:33 -06:00
pcmcia Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc 2014-08-07 08:50:34 -07:00
phy ARM: SoC driver changes for 3.17 2014-08-08 11:34:32 -07:00
pinctrl ARM: SoC driver changes for 3.17 2014-08-08 11:34:32 -07:00
platform platform/x86: Enable build support for toshiba_haps 2014-08-16 01:23:56 -07:00
pnp
power PM / AVS: rockchip-io: add driver handling Rockchip io domains 2014-09-25 09:57:23 -07:00
powercap
pps
ps3
ptp PCI: Remove DEFINE_PCI_DEVICE_TABLE macro use 2014-08-12 12:15:14 -06:00
pwm pwm: Changes for v3.17-rc1 2014-08-08 18:06:29 -07:00
rapidio PCI: Remove DEFINE_PCI_DEVICE_TABLE macro use 2014-08-12 12:15:14 -06:00
ras
regulator == Changes to existing drivers == 2014-08-07 17:17:39 -07:00
remoteproc
reset
rpmsg
rtc Merge branch 'akpm' (second patchbomb from Andrew Morton) 2014-08-08 15:57:47 -07:00
s390 Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux 2014-08-07 08:41:00 -07:00
sbus Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc 2014-08-05 18:57:18 -07:00
scsi SCSI misc on 20140815 2014-08-15 18:28:58 -06:00
sfi
sh
sn
soc
spi ARM: SoC cleanups for 3.17 2014-08-08 11:00:26 -07:00
spmi
ssb
staging Merge branch 'akpm' (second patchbomb from Andrew Morton) 2014-08-08 15:57:47 -07:00
target SCSI misc on 20140806 2014-08-06 20:10:32 -07:00
tc
thermal
thunderbolt
tty The branch contains the following device tree changes the v3.17 merge 2014-08-14 09:53:39 -06:00
uio
usb Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial 2014-08-06 21:03:53 -07:00
uwb uwb/whci: use correct structure type name in sizeof 2014-08-01 15:48:08 -07:00
vfio drivers/vfio: Enable VFIO if EEH is not supported 2014-08-08 10:39:16 -06:00
vhost
video PCI: Remove DEFINE_PCI_DEVICE_TABLE macro use 2014-08-12 12:15:14 -06:00
virt
virtio
vlynq
vme vme: bridges: use pci_zalloc_consistent 2014-08-08 15:57:30 -07:00
w1
watchdog Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus 2014-08-07 08:47:00 -07:00
xen PCI: Remove DEFINE_PCI_DEVICE_TABLE macro use 2014-08-12 12:15:14 -06:00
zorro
Kconfig Char / Misc driver patches for 3.17-rc1 2014-08-04 17:32:24 -07:00
Makefile Driver core patches for 3.17-rc1 2014-08-04 18:34:04 -07:00