linux-kernel - Re: Re: [PATCH] arm64: dts: ti: am62-phyboard-lyra: Add overlay to enable a GPIO fan

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Message-ID: <7zzhg5tgypia7nta3pz6ocu3linrfghmilnd7icdvsoupzyepp@4vbmmkh2jtc7>
Date: Thu, 8 Feb 2024 12:52:35 +0530
From: Jai Luthra <j-luthra@...com>
To: Wadim Egorov <w.egorov@...tec.de>
CC: Andrew Davis <afd@...com>, Nathan Morrisson <nmorrisson@...tec.com>,
        <nm@...com>, <vigneshr@...com>, <kristo@...nel.org>,
        <robh+dt@...nel.org>, <krzysztof.kozlowski+dt@...aro.org>,
        <conor+dt@...nel.org>, <linux-arm-kernel@...ts.infradead.org>,
        <devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <upstream@...ts.phytec.de>
Subject: Re: Re: [PATCH] arm64: dts: ti: am62-phyboard-lyra: Add overlay to
 enable a GPIO fan

Hi Wadim,

On Feb 08, 2024 at 06:57:54 +0100, Wadim Egorov wrote:
> Hi Andrew,
> 
> Am 07.02.24 um 23:20 schrieb Andrew Davis:
> > On 2/7/24 11:28 AM, Nathan Morrisson wrote:
> > > The phyBOARD-Lyra has a GPIO fan header. This overlay enables the fan
> > > header and sets the fan to turn on at 65C.
> > > 
> > > Signed-off-by: Nathan Morrisson <nmorrisson@...tec.com>
> > > ---
> > >   arch/arm64/boot/dts/ti/Makefile               |  1 +
> > >   .../ti/k3-am62-phyboard-lyra-gpio-fan.dtso    | 51 +++++++++++++++++++
> > >   2 files changed, 52 insertions(+)
> > >   create mode 100644
> > > arch/arm64/boot/dts/ti/k3-am62-phyboard-lyra-gpio-fan.dtso
> > > 
> > > diff --git a/arch/arm64/boot/dts/ti/Makefile
> > > b/arch/arm64/boot/dts/ti/Makefile
> > > index 52c1dc910308..379fb4f31a1f 100644
> > > --- a/arch/arm64/boot/dts/ti/Makefile
> > > +++ b/arch/arm64/boot/dts/ti/Makefile
> > > @@ -23,6 +23,7 @@ dtb-$(CONFIG_ARCH_K3) += k3-am625-verdin-wifi-dev.dtb
> > >   dtb-$(CONFIG_ARCH_K3) += k3-am625-verdin-wifi-mallow.dtb
> > >   dtb-$(CONFIG_ARCH_K3) += k3-am625-verdin-wifi-yavia.dtb
> > >   dtb-$(CONFIG_ARCH_K3) += k3-am62-lp-sk.dtb
> > > +dtb-$(CONFIG_ARCH_K3) += k3-am62-phyboard-lyra-gpio-fan.dtbo
> > 
> > Why not call this k3-am625-phyboard-lyra-gpio-fan.dtbo to match the
> > name of the base board it applies to better?
> 
> We are able to reuse this overlay for different SoMs (am625 and am62a) that
> are using the same carrier board (lyra).

In that case do you mind calling it k3-am62x-phyboard-*? It would match 
the existing convention we have for camera sensor overlays that can be 
applied on SK-AM62, SK-AM62A, SK-AM62P etc.
> 
> Regards,
> Wadim
> 
> 
> > 
> > Andrew
> > 
> > >     # Boards with AM62Ax SoC
> > >   dtb-$(CONFIG_ARCH_K3) += k3-am62a7-sk.dtb
> > > diff --git
> > > a/arch/arm64/boot/dts/ti/k3-am62-phyboard-lyra-gpio-fan.dtso
> > > b/arch/arm64/boot/dts/ti/k3-am62-phyboard-lyra-gpio-fan.dtso
> > > new file mode 100644
> > > index 000000000000..9c05748bdd9d
> > > --- /dev/null
> > > +++ b/arch/arm64/boot/dts/ti/k3-am62-phyboard-lyra-gpio-fan.dtso
> > > @@ -0,0 +1,51 @@
> > > +// SPDX-License-Identifier: GPL-2.0-only OR MIT
> > > +/*
> > > + * Copyright (C) 2024 PHYTEC America LLC
> > > + * Author: Garrett Giordano <ggiordano@...tec.com>
> > > + */
> > > +
> > > +/dts-v1/;
> > > +/plugin/;
> > > +
> > > +#include <dt-bindings/gpio/gpio.h>
> > > +#include <dt-bindings/thermal/thermal.h>
> > > +#include "k3-pinctrl.h"
> > > +
> > > +&{/} {
> > > +    fan: gpio-fan {
> > > +        compatible = "gpio-fan";
> > > +        gpio-fan,speed-map = <0 0 8600 1>;
> > > +        gpios = <&main_gpio0 40 GPIO_ACTIVE_LOW>;
> > > +        #cooling-cells = <2>;
> > > +        pinctrl-names = "default";
> > > +        pinctrl-0 = <&gpio_fan_pins_default>;
> > > +        status = "okay";
> > > +    };
> > > +};
> > > +
> > > +&main_pmx0 {
> > > +    gpio_fan_pins_default: gpio-fan-default-pins {
> > > +        pinctrl-single,pins = <
> > > +            AM62X_IOPAD(0x0a4, PIN_OUTPUT, 7) /* (M22)
> > > GPMC0_DIR.GPIO0_40 */
> > > +        >;
> > > +    };
> > > +};
> > > +
> > > +&thermal_zones {
> > > +    main0_thermal: main0-thermal {
> > > +        trips {
> > > +            main0_thermal_trip0: main0-thermal-trip {
> > > +                temperature = <65000>;  /* millicelsius */
> > > +                hysteresis = <2000>;    /* millicelsius */
> > > +                type = "active";
> > > +            };
> > > +        };
> > > +
> > > +        cooling-maps {
> > > +            map0 {
> > > +                trip = <&main0_thermal_trip0>;
> > > +                cooling-device = <&fan THERMAL_NO_LIMIT
> > > THERMAL_NO_LIMIT>;
> > > +            };
> > > +        };
> > > +    };
> > > +};
> > 
> > _______________________________________________
> > linux-arm-kernel mailing list
> > linux-arm-kernel@...ts.infradead.org
> > http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

-- 
Thanks,
Jai

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