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…benh/powerpc

Pull more powerpc bits from Ben Herrenschmidt:
 "Here are a few more powerpc bits for this merge window.  The bulk is
  made of two pull requests from Scott and Anatolij that I had missed
  previously (they arrived while I was away).  Since both their branches
  are in -next independently, and the content has been around for a
  little while, they can still go in.

  The rest is mostly bug and regression fixes, a small series of
  cleanups to our pseries cpuidle code (including moving it to the right
  place), and one new cpuidle bakend for the powernv platform.  I also
  wired up the new sched_attr syscalls"

* 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc: (37 commits)
  powerpc: Wire up sched_setattr and sched_getattr syscalls
  powerpc/hugetlb: Replace __get_cpu_var with get_cpu_var
  powerpc: Make sure "cache" directory is removed when offlining cpu
  powerpc/mm: Fix mmap errno when MAP_FIXED is set and mapping exceeds the allowed address space
  powerpc/powernv/cpuidle: Back-end cpuidle driver for powernv platform.
  powerpc/pseries/cpuidle: smt-snooze-delay cleanup.
  powerpc/pseries/cpuidle: Remove MAX_IDLE_STATE macro.
  powerpc/pseries/cpuidle: Make cpuidle-pseries backend driver a non-module.
  powerpc/pseries/cpuidle: Use cpuidle_register() for initialisation.
  powerpc/pseries/cpuidle: Move processor_idle.c to drivers/cpuidle.
  powerpc: Fix 32-bit frames for signals delivered when transactional
  powerpc/iommu: Fix initialisation of DART iommu table
  powerpc/numa: Fix decimal permissions
  powerpc/mm: Fix compile error of pgtable-ppc64.h
  powerpc: Fix hw breakpoints on !HAVE_HW_BREAKPOINT configurations
  clk: corenet: Adds the clock binding
  powerpc/booke64: Guard e6500 tlb handler with CONFIG_PPC_FSL_BOOK3E
  powerpc/512x: dts: add MPC5125 clock specs
  powerpc/512x: clk: support MPC5121/5123/5125 SoC variants
  powerpc/512x: clk: enforce even SDHC divider values
  ...
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Linus Torvalds committed Jan 31, 2014
2 parents 03c7287 + f878f84 commit 4bcec91
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134 changes: 134 additions & 0 deletions Documentation/devicetree/bindings/clock/corenet-clock.txt
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* Clock Block on Freescale CoreNet Platforms

Freescale CoreNet chips take primary clocking input from the external
SYSCLK signal. The SYSCLK input (frequency) is multiplied using
multiple phase locked loops (PLL) to create a variety of frequencies
which can then be passed to a variety of internal logic, including
cores and peripheral IP blocks.
Please refer to the Reference Manual for details.

1. Clock Block Binding

Required properties:
- compatible: Should contain a specific clock block compatible string
and a single chassis clock compatible string.
Clock block strings include, but not limited to, one of the:
* "fsl,p2041-clockgen"
* "fsl,p3041-clockgen"
* "fsl,p4080-clockgen"
* "fsl,p5020-clockgen"
* "fsl,p5040-clockgen"
* "fsl,t4240-clockgen"
* "fsl,b4420-clockgen"
* "fsl,b4860-clockgen"
Chassis clock strings include:
* "fsl,qoriq-clockgen-1.0": for chassis 1.0 clocks
* "fsl,qoriq-clockgen-2.0": for chassis 2.0 clocks
- reg: Describes the address of the device's resources within the
address space defined by its parent bus, and resource zero
represents the clock register set
- clock-frequency: Input system clock frequency

Recommended properties:
- ranges: Allows valid translation between child's address space and
parent's. Must be present if the device has sub-nodes.
- #address-cells: Specifies the number of cells used to represent
physical base addresses. Must be present if the device has
sub-nodes and set to 1 if present
- #size-cells: Specifies the number of cells used to represent
the size of an address. Must be present if the device has
sub-nodes and set to 1 if present

2. Clock Provider/Consumer Binding

Most of the bindings are from the common clock binding[1].
[1] Documentation/devicetree/bindings/clock/clock-bindings.txt

Required properties:
- compatible : Should include one of the following:
* "fsl,qoriq-core-pll-1.0" for core PLL clocks (v1.0)
* "fsl,qoriq-core-pll-2.0" for core PLL clocks (v2.0)
* "fsl,qoriq-core-mux-1.0" for core mux clocks (v1.0)
* "fsl,qoriq-core-mux-2.0" for core mux clocks (v2.0)
* "fsl,qoriq-sysclk-1.0": for input system clock (v1.0).
It takes parent's clock-frequency as its clock.
* "fsl,qoriq-sysclk-2.0": for input system clock (v2.0).
It takes parent's clock-frequency as its clock.
- #clock-cells: From common clock binding. The number of cells in a
clock-specifier. Should be <0> for "fsl,qoriq-sysclk-[1,2].0"
clocks, or <1> for "fsl,qoriq-core-pll-[1,2].0" clocks.
For "fsl,qoriq-core-pll-[1,2].0" clocks, the single
clock-specifier cell may take the following values:
* 0 - equal to the PLL frequency
* 1 - equal to the PLL frequency divided by 2
* 2 - equal to the PLL frequency divided by 4

Recommended properties:
- clocks: Should be the phandle of input parent clock
- clock-names: From common clock binding, indicates the clock name
- clock-output-names: From common clock binding, indicates the names of
output clocks
- reg: Should be the offset and length of clock block base address.
The length should be 4.

Example for clock block and clock provider:
/ {
clockgen: global-utilities@e1000 {
compatible = "fsl,p5020-clockgen", "fsl,qoriq-clockgen-1.0";
ranges = <0x0 0xe1000 0x1000>;
clock-frequency = <133333333>;
reg = <0xe1000 0x1000>;
#address-cells = <1>;
#size-cells = <1>;

sysclk: sysclk {
#clock-cells = <0>;
compatible = "fsl,qoriq-sysclk-1.0";
clock-output-names = "sysclk";
}

pll0: pll0@800 {
#clock-cells = <1>;
reg = <0x800 0x4>;
compatible = "fsl,qoriq-core-pll-1.0";
clocks = <&sysclk>;
clock-output-names = "pll0", "pll0-div2";
};

pll1: pll1@820 {
#clock-cells = <1>;
reg = <0x820 0x4>;
compatible = "fsl,qoriq-core-pll-1.0";
clocks = <&sysclk>;
clock-output-names = "pll1", "pll1-div2";
};

mux0: mux0@0 {
#clock-cells = <0>;
reg = <0x0 0x4>;
compatible = "fsl,qoriq-core-mux-1.0";
clocks = <&pll0 0>, <&pll0 1>, <&pll1 0>, <&pll1 1>;
clock-names = "pll0", "pll0-div2", "pll1", "pll1-div2";
clock-output-names = "cmux0";
};

mux1: mux1@20 {
#clock-cells = <0>;
reg = <0x20 0x4>;
compatible = "fsl,qoriq-core-mux-1.0";
clocks = <&pll0 0>, <&pll0 1>, <&pll1 0>, <&pll1 1>;
clock-names = "pll0", "pll0-div2", "pll1", "pll1-div2";
clock-output-names = "cmux1";
};
};
}

Example for clock consumer:

/ {
cpu0: PowerPC,e5500@0 {
...
clocks = <&mux0>;
...
};
}
6 changes: 1 addition & 5 deletions arch/powerpc/Kconfig
Original file line number Diff line number Diff line change
Expand Up @@ -532,6 +532,7 @@ config PPC_16K_PAGES

config PPC_64K_PAGES
bool "64k page size" if 44x || PPC_STD_MMU_64 || PPC_BOOK3E_64
depends on !PPC_FSL_BOOK3E
select PPC_HAS_HASH_64K if PPC_STD_MMU_64

config PPC_256K_PAGES
Expand Down Expand Up @@ -1045,11 +1046,6 @@ config KEYS_COMPAT

source "crypto/Kconfig"

config PPC_CLOCK
bool
default n
select HAVE_CLK

config PPC_LIB_RHEAP
bool

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7 changes: 7 additions & 0 deletions arch/powerpc/boot/dts/ac14xx.dts
Original file line number Diff line number Diff line change
Expand Up @@ -139,7 +139,14 @@
};
};

clocks {
osc {
clock-frequency = <25000000>;
};
};

soc@80000000 {
bus-frequency = <80000000>; /* 80 MHz ips bus */

clock@f00 {
compatible = "fsl,mpc5121rev2-clock", "fsl,mpc5121-clock";
Expand Down
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