Merge tag 'armsoc-drivers' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc

Pull ARM SoC driver updates from Arnd Bergmann:
 "Driver updates for ARM SoCs, including a couple of newly added
  drivers:

   - The Qualcomm external bus interface 2 (EBI2), used in some of their
     mobile phone chips for connecting flash memory, LCD displays or
     other peripherals

   - Secure monitor firmware for Amlogic SoCs, and an NVMEM driver for
     the EFUSE based on that firmware interface.

   - Perf support for the AppliedMicro X-Gene performance monitor unit

   - Reset driver for STMicroelectronics STM32

   - Reset driver for SocioNext UniPhier SoCs

  Aside from these, there are minor updates to SoC-specific bus,
  clocksource, firmware, pinctrl, reset, rtc and pmic drivers"

* tag 'armsoc-drivers' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (50 commits)
  bus: qcom-ebi2: depend on HAS_IOMEM
  pinctrl: mvebu: orion5x: Generalise mv88f5181l support for 88f5181
  clk: mvebu: Add clk support for the orion5x SoC mv88f5181
  dt-bindings: EXYNOS: Add Exynos5433 PMU compatible
  clocksource: exynos_mct: Add the support for ARM64
  perf: xgene: Add APM X-Gene SoC Performance Monitoring Unit driver
  Documentation: Add documentation for APM X-Gene SoC PMU DTS binding
  MAINTAINERS: Add entry for APM X-Gene SoC PMU driver
  bus: qcom: add EBI2 driver
  bus: qcom: add EBI2 device tree bindings
  rtc: rtc-pm8xxx: Add support for pm8018 rtc
  nvmem: amlogic: Add Amlogic Meson EFUSE driver
  firmware: Amlogic: Add secure monitor driver
  soc: qcom: smd: Reset rx tail rather than tx
  memory: atmel-sdramc: fix a possible NULL dereference
  reset: hi6220: allow to compile test driver on other architectures
  reset: zynq: add driver Kconfig option
  reset: sunxi: add driver Kconfig option
  reset: stm32: add driver Kconfig option
  reset: socfpga: add driver Kconfig option
  ...

52 files changed, 3789 insertions, 290 deletions

diff --git a/Documentation/devicetree/bindings/arm/samsung/pmu.txt b/Documentation/devicetree/bindings/arm/samsung/pmu.txt
index 2d6356d8daf4..bf5fc59a6938 100644
--- a/Documentation/devicetree/bindings/arm/samsung/pmu.txt
+++ b/Documentation/devicetree/bindings/arm/samsung/pmu.txt
@@ -10,6 +10,7 @@ Properties:
                    - "samsung,exynos5260-pmu" - for Exynos5260 SoC.
                    - "samsung,exynos5410-pmu" - for Exynos5410 SoC,
                    - "samsung,exynos5420-pmu" - for Exynos5420 SoC.
+                   - "samsung,exynos5433-pmu" - for Exynos5433 SoC.
                    - "samsung,exynos7-pmu" - for Exynos7 SoC.
                 second value must be always "syscon".
 
diff --git a/Documentation/devicetree/bindings/bus/qcom,ebi2.txt b/Documentation/devicetree/bindings/bus/qcom,ebi2.txt
new file mode 100644
index 000000000000..920681f552db
--- /dev/null
+++ b/Documentation/devicetree/bindings/bus/qcom,ebi2.txt
@@ -0,0 +1,138 @@
+Qualcomm External Bus Interface 2 (EBI2)
+
+The EBI2 contains two peripheral blocks: XMEM and LCDC. The XMEM handles any
+external memory (such as NAND or other memory-mapped peripherals) whereas
+LCDC handles LCD displays.
+
+As it says it connects devices to an external bus interface, meaning address
+lines (up to 9 address lines so can only address 1KiB external memory space),
+data lines (16 bits), OE (output enable), ADV (address valid, used on some
+NOR flash memories), WE (write enable). This on top of 6 different chip selects
+(CS0 thru CS5) so that in theory 6 different devices can be connected.
+
+Apparently this bus is clocked at 64MHz. It has dedicated pins on the package
+and the bus can only come out on these pins, however if some of the pins are
+unused they can be left unconnected or remuxed to be used as GPIO or in some
+cases other orthogonal functions as well.
+
+Also CS1 and CS2 has -A and -B signals. Why they have that is unclear to me.
+
+The chip selects have the following memory range assignments. This region of
+memory is referred to as "Chip Peripheral SS FPB0" and is 168MB big.
+
+Chip Select                     Physical address base
+CS0 GPIO134                     0x1a800000-0x1b000000 (8MB)
+CS1 GPIO39 (A) / GPIO123 (B)    0x1b000000-0x1b800000 (8MB)
+CS2 GPIO40 (A) / GPIO124 (B)    0x1b800000-0x1c000000 (8MB)
+CS3 GPIO133                     0x1d000000-0x25000000 (128 MB)
+CS4 GPIO132                     0x1c800000-0x1d000000 (8MB)
+CS5 GPIO131                     0x1c000000-0x1c800000 (8MB)
+
+The APQ8060 Qualcomm Application Processor User Guide, 80-N7150-14 Rev. A,
+August 6, 2012 contains some incomplete documentation of the EBI2.
+
+FIXME: the manual mentions "write precharge cycles" and "precharge cycles".
+We have not been able to figure out which bit fields these correspond to
+in the hardware, or what valid values exist. The current hypothesis is that
+this is something just used on the FAST chip selects and that the SLOW
+chip selects are understood fully. There is also a "byte device enable"
+flag somewhere for 8bit memories.
+
+FIXME: The chipselects have SLOW and FAST configuration registers. It's a bit
+unclear what this means, if they are mutually exclusive or can be used
+together, or if some chip selects are hardwired to be FAST and others are SLOW
+by design.
+
+The XMEM registers are totally undocumented but could be partially decoded
+because the Cypress AN49576 Antioch Westbridge apparently has suspiciously
+similar register layout, see: http://www.cypress.com/file/105771/download
+
+Required properties:
+- compatible: should be one of:
+  "qcom,msm8660-ebi2"
+  "qcom,apq8060-ebi2"
+- #address-cells: shoule be <2>: the first cell is the chipselect,
+  the second cell is the offset inside the memory range
+- #size-cells: should be <1>
+- ranges: should be set to:
+  ranges = <0 0x0 0x1a800000 0x00800000>,
+           <1 0x0 0x1b000000 0x00800000>,
+           <2 0x0 0x1b800000 0x00800000>,
+           <3 0x0 0x1d000000 0x08000000>,
+           <4 0x0 0x1c800000 0x00800000>,
+           <5 0x0 0x1c000000 0x00800000>;
+- reg: two ranges of registers: EBI2 config and XMEM config areas
+- reg-names: should be "ebi2", "xmem"
+- clocks: two clocks, EBI_2X and EBI
+- clock-names: shoule be "ebi2x", "ebi2"
+
+Optional subnodes:
+- Nodes inside the EBI2 will be considered device nodes.
+
+The following optional properties are properties that can be tagged onto
+any device subnode. We are assuming that there can be only ONE device per
+chipselect subnode, else the properties will become ambigous.
+
+Optional properties arrays for SLOW chip selects:
+- qcom,xmem-recovery-cycles: recovery cycles is the time the memory continues to
+  drive the data bus after OE is de-asserted, in order to avoid contention on
+  the data bus. They are inserted when reading one CS and switching to another
+  CS or read followed by write on the same CS. Valid values 0 thru 15. Minimum
+  value is actually 1, so a value of 0 will still yield 1 recovery cycle.
+- qcom,xmem-write-hold-cycles: write hold cycles, these are extra cycles
+  inserted after every write minimum 1. The data out is driven from the time
+  WE is asserted until CS is asserted. With a hold of 1 (value = 0), the CS
+  stays active for 1 extra cycle etc. Valid values 0 thru 15.
+- qcom,xmem-write-delta-cycles: initial latency for write cycles inserted for
+  the first write to a page or burst memory. Valid values 0 thru 255.
+- qcom,xmem-read-delta-cycles: initial latency for read cycles inserted for the
+  first read to a page or burst memory. Valid values 0 thru 255.
+- qcom,xmem-write-wait-cycles: number of wait cycles for every write access, 0=1
+  cycle