[PATCH v2 2/3] dt-bindings: pwm: marvell,pxa-pwm: Update to use #pwm-cells = <3>

[Uwe Kleine-König]

The PXA PWM binding is the only one that doesn't pass the PWM line index
as first parameter of the parameter cells. However this can be upgraded
to the mandatory binding for all new PWM drivers without breaking
compatibility for old device trees using #pwm-cells = <1>.

So bump #pwm-cells to 3 with the (undocumented) promise to keep the old
behaviour for #pwm-cells = <1>.

Acked-by: Conor Dooley <conor.dooley at microchip.com>
Tested-by: Duje Mihanović <duje.mihanovic at skole.hr>
Reviewed-by: Daniel Mack <daniel at zonque.org>
Signed-off-by: Uwe Kleine-König <u.kleine-koenig at baylibre.com>
---
 Documentation/devicetree/bindings/pwm/marvell,pxa-pwm.yaml | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/Documentation/devicetree/bindings/pwm/marvell,pxa-pwm.yaml b/Documentation/devicetree/bindings/pwm/marvell,pxa-pwm.yaml
index 9ee1946dc2e1..74f2d5964742 100644
--- a/Documentation/devicetree/bindings/pwm/marvell,pxa-pwm.yaml
+++ b/Documentation/devicetree/bindings/pwm/marvell,pxa-pwm.yaml
@@ -25,8 +25,7 @@ properties:
     maxItems: 1
 
   "#pwm-cells":
-    # Used for specifying the period length in nanoseconds
-    const: 1
+    const: 3
 
   clocks:
     maxItems: 1
@@ -45,6 +44,6 @@ examples:
     pwm0: pwm at 40b00000 {
       compatible = "marvell,pxa250-pwm";
       reg = <0x40b00000 0x10>;
-      #pwm-cells = <1>;
+      #pwm-cells = <3>;
       clocks = <&clks CLK_PWM0>;
     };
-- 
2.47.1