[PATCH 2/2] DT: pwm: Add NXP LPC18xx PWM/SCT binding documentation
From: Joachim Eastwood <hidden>
Date: 2015-07-28 22:37:13
Also in:
linux-pwm
On 27 July 2015 at 06:45, Ariel D'Alessandro [off-list ref] wrote:
quoted hunk ↗ jump to hunk
Add the devicetree binding document for NXP LPC18xx PWM/SCT. Signed-off-by: Ariel D'Alessandro <redacted> --- .../devicetree/bindings/pwm/lpc1850-pwm.txt | 20 ++++++++++++++++++++ 1 file changed, 20 insertions(+) create mode 100644 Documentation/devicetree/bindings/pwm/lpc1850-pwm.txtdiff --git a/Documentation/devicetree/bindings/pwm/lpc1850-pwm.txt b/Documentation/devicetree/bindings/pwm/lpc1850-pwm.txt new file mode 100644 index 0000000..3055429 --- /dev/null +++ b/Documentation/devicetree/bindings/pwm/lpc1850-pwm.txt@@ -0,0 +1,20 @@ +* NXP LPC18xx Pulse Width Modulator driver + +Required properties: + - compatible: Should be "nxp,lpc1850-pwm" + - reg: Should contain physical base address and length of pwm registers. + - clocks: Must contain an entry for each entry in clock-names. + See ../clock/clock-bindings.txt for details. + - clock-names: Must include the following entries. + - pwm: PWM operating clock. + - #pwm-cells: Should be 3. See pwm.txt in this directory for the description + of the cells format. + +Example: + pwm: pwm at 40000000 { + compatible = "nxp,lpc1850-pwm";
I would prefer "nxp,lpc1850-sct" for a couple of reasons. SCT is the name of hardware block as described in the user manual and while PWM is the most obvious usage for this block on Linux, the hardware is not limited to just doing that. So as a bit of future proofing if someone wants to use this block for more than PWM I would prefer SCT.
+ reg = <0x40000000 0x580>;
Please map the entire memory block as noted in the user manual, ie. 0x1000. regards, Joachim Eastwood