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pwm: Changes for v3.8-rc1

Browse source 
A new driver has been added for the SPEAr platform and the TWL4030/6030
 driver has been replaced by two drivers that control the regular PWMs
 and the PWM driven LEDs provided by the chips.
 
 The vt8500, tiecap, tiehrpwm, i.MX, LPC32xx and Samsung drivers have all
 been improved and the device tree bindings now support the PWM signal
 polarity.
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Merge tag 'for-3.8-rc1' of git://gitorious.org/linux-pwm/linux-pwm

Pull pwm changes from Thierry Reding:
 "A new driver has been added for the SPEAr platform and the
  TWL4030/6030 driver has been replaced by two drivers that control the
  regular PWMs and the PWM driven LEDs provided by the chips.

  The vt8500, tiecap, tiehrpwm, i.MX, LPC32xx and Samsung drivers have
  all been improved and the device tree bindings now support the PWM
  signal polarity."

Fix up trivial conflicts due to __devinit/exit removal.

* tag 'for-3.8-rc1' of git://gitorious.org/linux-pwm/linux-pwm: (21 commits)
  pwm: samsung: add missing s3c->pwm_id assignment
  pwm: lpc32xx: Set the chip base for dynamic allocation
  pwm: lpc32xx: Properly disable the clock on device removal
  pwm: lpc32xx: Fix the PWM polarity
  pwm: i.MX: eliminate build warning
  pwm: Export of_pwm_xlate_with_flags()
  pwm: Remove pwm-twl6030 driver
  pwm: New driver to support PWM driven LEDs on TWL4030/6030 series of PMICs
  pwm: New driver to support PWMs on TWL4030/6030 series of PMICs
  pwm: pwm-tiehrpwm: pinctrl support
  pwm: tiehrpwm: Add device-tree binding
  pwm: pwm-tiehrpwm: Adding TBCLK gating support.
  pwm: pwm-tiecap: pinctrl support
  pwm: tiecap: Add device-tree binding
  pwm: Add TI PWM subsystem driver
  pwm: Device tree support for PWM polarity
  pwm: vt8500: Ensure PWM clock is enabled during pwm_config
  pwm: vt8500: Fix build error
  pwm: spear: Staticize spear_pwm_config()
  pwm: Add SPEAr PWM chip driver support
  ...
This commit is contained in:
Linus Torvalds 2012-12-19 08:19:07 -08:00
commit 74779e2226
24 changed files with 1593 additions and 221 deletions
Download patch file Download diff file Expand all files Collapse all files

23
Documentation/devicetree/bindings/pwm/pwm-tiecap.txt Normal file
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@ -0,0 +1,23 @@
TI SOC ECAP based APWM controller
Required properties:
- compatible: Must be "ti,am33xx-ecap"
- #pwm-cells: Should be 3. Number of cells being used to specify PWM property.
First cell specifies the per-chip index of the PWM to use, the second
cell is the period in nanoseconds and bit 0 in the third cell is used to
encode the polarity of PWM output. Set bit 0 of the third in PWM specifier
to 1 for inverse polarity & set to 0 for normal polarity.
- reg: physical base address and size of the registers map.
Optional properties:
- ti,hwmods: Name of the hwmod associated to the ECAP:
"ecap<x>", <x> being the 0-based instance number from the HW spec
Example:
ecap0: ecap@0 {
compatible = "ti,am33xx-ecap";
#pwm-cells = <3>;
reg = <0x48300100 0x80>;
ti,hwmods = "ecap0";
};

23
Documentation/devicetree/bindings/pwm/pwm-tiehrpwm.txt Normal file
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@ -0,0 +1,23 @@
TI SOC EHRPWM based PWM controller
Required properties:
- compatible : Must be "ti,am33xx-ehrpwm"
- #pwm-cells: Should be 3. Number of cells being used to specify PWM property.
First cell specifies the per-chip index of the PWM to use, the second
cell is the period in nanoseconds and bit 0 in the third cell is used to
encode the polarity of PWM output. Set bit 0 of the third in PWM specifier
to 1 for inverse polarity & set to 0 for normal polarity.
- reg: physical base address and size of the registers map.
Optional properties:
- ti,hwmods: Name of the hwmod associated to the EHRPWM:
"ehrpwm<x>", <x> being the 0-based instance number from the HW spec
Example:
ehrpwm0: ehrpwm@0 {
compatible = "ti,am33xx-ehrpwm";
#pwm-cells = <3>;
reg = <0x48300200 0x100>;
ti,hwmods = "ehrpwm0";
};

31
Documentation/devicetree/bindings/pwm/pwm-tipwmss.txt Normal file
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@ -0,0 +1,31 @@
TI SOC based PWM Subsystem
Required properties:
- compatible: Must be "ti,am33xx-pwmss";
- reg: physical base address and size of the registers map.
- address-cells: Specify the number of u32 entries needed in child nodes.
Should set to 1.
- size-cells: specify number of u32 entries needed to specify child nodes size
in reg property. Should set to 1.
- ranges: describes the address mapping of a memory-mapped bus. Should set to
physical address map of child's base address, physical address within
parent's address space and length of the address map. For am33xx,
3 set of child register maps present, ECAP register space, EQEP
register space, EHRPWM register space.
Also child nodes should also populated under PWMSS DT node.
Example:
pwmss0: pwmss@48300000 {
compatible = "ti,am33xx-pwmss";
reg = <0x48300000 0x10>;
ti,hwmods = "epwmss0";
#address-cells = <1>;
#size-cells = <1>;
status = "disabled";
ranges = <0x48300100 0x48300100 0x80 /* ECAP */
0x48300180 0x48300180 0x80 /* EQEP */
0x48300200 0x48300200 0x80>; /* EHRPWM */
/* child nodes go here */
};

17
Documentation/devicetree/bindings/pwm/pwm.txt
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@ -37,10 +37,21 @@ device:
pwm-names = "backlight";
};
Note that in the example above, specifying the "pwm-names" is redundant
because the name "backlight" would be used as fallback anyway.
pwm-specifier typically encodes the chip-relative PWM number and the PWM
period in nanoseconds. Note that in the example above, specifying the
"pwm-names" is redundant because the name "backlight" would be used as
fallback anyway.
period in nanoseconds.
Optionally, the pwm-specifier can encode a number of flags in a third cell:
- bit 0: PWM signal polarity (0: normal polarity, 1: inverse polarity)
Example with optional PWM specifier for inverse polarity
bl: backlight {
pwms = <&pwm 0 5000000 1>;
pwm-names = "backlight";
};
2) PWM controller nodes
-----------------------

18
Documentation/devicetree/bindings/pwm/spear-pwm.txt Normal file
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@ -0,0 +1,18 @@
== ST SPEAr SoC PWM controller ==
Required properties:
- compatible: should be one of:
- "st,spear320-pwm"
- "st,spear1340-pwm"
- reg: physical base address and length of the controller's registers
- #pwm-cells: number of cells used to specify PWM which is fixed to 2 on
SPEAr. The first cell specifies the per-chip index of the PWM to use and
the second cell is the period in nanoseconds.
Example:
pwm: pwm@a8000000 {
compatible ="st,spear320-pwm";
reg = <0xa8000000 0x1000>;
#pwm-cells = <2>;
};

17
Documentation/devicetree/bindings/pwm/ti,twl-pwm.txt Normal file
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@ -0,0 +1,17 @@
Texas Instruments TWL series PWM drivers
Supported PWMs:
On TWL4030 series: PWM1 and PWM2
On TWL6030 series: PWM0 and PWM1
Required properties:
- compatible: "ti,twl4030-pwm" or "ti,twl6030-pwm"
- #pwm-cells: should be 2. The first cell specifies the per-chip index
of the PWM to use and the second cell is the period in nanoseconds.
Example:
twl_pwm: pwm {
compatible = "ti,twl6030-pwm";
#pwm-cells = <2>;
};

17
Documentation/devicetree/bindings/pwm/ti,twl-pwmled.txt Normal file
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@ -0,0 +1,17 @@
Texas Instruments TWL series PWM drivers connected to LED terminals
Supported PWMs:
On TWL4030 series: PWMA and PWMB (connected to LEDA and LEDB terminals)
On TWL6030 series: LED PWM (mainly used as charging indicator LED)
Required properties:
- compatible: "ti,twl4030-pwmled" or "ti,twl6030-pwmled"
- #pwm-cells: should be 2. The first cell specifies the per-chip index
of the PWM to use and the second cell is the period in nanoseconds.
Example:
twl_pwmled: pwmled {
compatible = "ti,twl6030-pwmled";
#pwm-cells = <2>;
};

17
Documentation/devicetree/bindings/pwm/vt8500-pwm.txt Normal file
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@ -0,0 +1,17 @@
VIA/Wondermedia VT8500/WM8xxx series SoC PWM controller
Required properties:
- compatible: should be "via,vt8500-pwm"
- reg: physical base address and length of the controller's registers
- #pwm-cells: should be 2. The first cell specifies the per-chip index
of the PWM to use and the second cell is the period in nanoseconds.
- clocks: phandle to the PWM source clock
Example:
pwm1: pwm@d8220000 {
#pwm-cells = <2>;
compatible = "via,vt8500-pwm";
reg = <0xd8220000 0x1000>;
clocks = <&clkpwm>;
};