aboutsummaryrefslogtreecommitdiffstats
path: root/Documentation/devicetree/bindings/pwm
diff options
context:
space:
mode:
authorLinus Torvalds <torvalds@linux-foundation.org>2014-01-27 16:15:51 (GMT)
committerLinus Torvalds <torvalds@linux-foundation.org>2014-01-27 16:15:51 (GMT)
commit398b60a8de46adfbd43aa4c01753acf0161ec764 (patch)
tree7d3a1673f4c764782cec34523967b386bf085fc6 /Documentation/devicetree/bindings/pwm
parent028e219eff45ce8ba962c59e3dbc622499e88d50 (diff)
parent6691a19966f04dd81e60505f9630c1a7cf148507 (diff)
Merge tag 'pwm/for-3.14-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/thierry.reding/linux-pwm
Pull pwm changes from Thierry Reding: "The patches for this release cycle include various enhancements (device tree support, better compile coverage, ...) for existing drivers. There is a new driver for Atmel SoCs. Various drivers as well as the sysfs support received minor fixes and cleanups" * tag 'pwm/for-3.14-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/thierry.reding/linux-pwm: pwm: tiecap: Remove duplicate put_sync call pwm: tiehrpwm: use dev_err() instead of pr_err() pwm: pxa: remove unnecessary space before tabs pwm: ep93xx: split module author names pwm: use seq_puts() instead of seq_printf() pwm: atmel-pwm: Do not unprepare clock after successful registration of: Add Atmel PWM controller device tree binding pwm: atmel-pwm: Add Atmel PWM controller driver backlight: pwm_bl: Remove error message upon devm_kzalloc() failure pwm: pca9685: depends on I2C rather than REGMAP_I2C pwm: renesas-tpu: Enable driver compilation with COMPILE_TEST pwm: jz4740: Use devm_clk_get() pwm: jz4740: Pass device to clk_get() pwm: sysfs: Convert to use ATTRIBUTE_GROUPS macro pwm: pxa: Add device tree support
Diffstat (limited to 'Documentation/devicetree/bindings/pwm')
-rw-r--r--Documentation/devicetree/bindings/pwm/atmel-pwm.txt33
-rw-r--r--Documentation/devicetree/bindings/pwm/pxa-pwm.txt30
2 files changed, 63 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/pwm/atmel-pwm.txt b/Documentation/devicetree/bindings/pwm/atmel-pwm.txt
new file mode 100644
index 0000000..02331b9
--- /dev/null
+++ b/Documentation/devicetree/bindings/pwm/atmel-pwm.txt
@@ -0,0 +1,33 @@
+Atmel PWM controller
+
+Required properties:
+ - compatible: should be one of:
+ - "atmel,at91sam9rl-pwm"
+ - "atmel,sama5d3-pwm"
+ - reg: physical base address and length of the controller's registers
+ - #pwm-cells: Should be 3. See pwm.txt in this directory for a
+ description of the cells format.
+
+Example:
+
+ pwm0: pwm@f8034000 {
+ compatible = "atmel,at91sam9rl-pwm";
+ reg = <0xf8034000 0x400>;
+ #pwm-cells = <3>;
+ };
+
+ pwmleds {
+ compatible = "pwm-leds";
+
+ d1 {
+ label = "d1";
+ pwms = <&pwm0 3 5000 0>
+ max-brightness = <255>;
+ };
+
+ d2 {
+ label = "d2";
+ pwms = <&pwm0 1 5000 1>
+ max-brightness = <255>;
+ };
+ };
diff --git a/Documentation/devicetree/bindings/pwm/pxa-pwm.txt b/Documentation/devicetree/bindings/pwm/pxa-pwm.txt
new file mode 100644
index 0000000..5ae9f1e
--- /dev/null
+++ b/Documentation/devicetree/bindings/pwm/pxa-pwm.txt
@@ -0,0 +1,30 @@
+Marvell PWM controller
+
+Required properties:
+- compatible: should be one or more of:
+ - "marvell,pxa250-pwm"
+ - "marvell,pxa270-pwm"
+ - "marvell,pxa168-pwm"
+ - "marvell,pxa910-pwm"
+- reg: Physical base address and length of the registers used by the PWM channel
+ Note that one device instance must be created for each PWM that is used, so the
+ length covers only the register window for one PWM output, not that of the
+ entire PWM controller. Currently length is 0x10 for all supported devices.
+- #pwm-cells: Should be 1. This cell is used to specify the period in
+ nanoseconds.
+
+Example PWM device node:
+
+pwm0: pwm@40b00000 {
+ compatible = "marvell,pxa250-pwm";
+ reg = <0x40b00000 0x10>;
+ #pwm-cells = <1>;
+};
+
+Example PWM client node:
+
+backlight {
+ compatible = "pwm-backlight";
+ pwms = <&pwm0 5000000>;
+ ...
+}

Privacy Policy