arm64: dts: freescale: imx8mp-toradex-smarc: add fan cooling levels

The fan controller on this board cannot work in automatic mode, and
requires software control, the reason is that it has no temperature
sensor connected.

Given that this board is a development kit and does not have any
specific fan, add a default single cooling level that would enable the
fan to spin with a 100% duty cycle, enabling a safe default.

Signed-off-by: João Paulo Gonçalves <joao.goncalves@toradex.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>

diff --git a/arch/arm64/boot/dts/freescale/imx8mp-toradex-smarc-dev.dts b/arch/arm64/boot/dts/freescale/imx8mp-toradex-smarc-dev.dts
index 55b8c5c14fb4f3e7407243760ac01b0aca0dacf5..5f233304cea747d3f04a748265f96696668c9d6b 100644 (file)
--- a/arch/arm64/boot/dts/freescale/imx8mp-toradex-smarc-dev.dts
+++ b/arch/arm64/boot/dts/freescale/imx8mp-toradex-smarc-dev.dts
@@ -213,6 +213,7 @@
                #pwm-cells = <2>;
 
                fan {
+                       cooling-levels = <255>;
                        pwms = <&fan_controller 40000 PWM_POLARITY_INVERTED>;
                };
        };