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Date: Fri, 16 Feb 2024 08:19:19 +0100
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Subject: Re: [PATCH v2 2/2] dt-bindings: trivial-devices: Add qca,qca4024
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To: frut3k7 <frut3k7@gmail.com>
Cc: Rob Herring <robh+dt@kernel.org>, Robert Marko <robimarko@gmail.com>,
 Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>,
 Conor Dooley <conor+dt@kernel.org>, Mark Brown <broonie@kernel.org>,
 Guenter Roeck <linux@roeck-us.net>, Peter Yin <peteryin.openbmc@gmail.com>,
 Patrick Rudolph <patrick.rudolph@9elements.com>,
 Michal Simek <michal.simek@amd.com>, Marek Vasut <marex@denx.de>,
 Luca Ceresoli <luca.ceresoli@bootlin.com>,
 Bjorn Helgaas <bhelgaas@google.com>, Lukas Wunner <lukas@wunner.de>,
 Fabio Estevam <festevam@denx.de>,
 Alexander Stein <alexander.stein@ew.tq-group.com>,
 devicetree@vger.kernel.org, linux-kernel@vger.kernel.org,
 linux-spi@vger.kernel.org
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From: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
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On 15/02/2024 23:01, frut3k7 wrote:
> The device I use has the QCA4024 chip connected via the spi controller:
>         blsp1_spi4: spi@78b8000 {
>             compatible = "qcom,spi-qup-v2.2.1";
>             #address-cells = <1>;
>             #size-cells = <0>;
>             reg = <0x78b8000 0x600>;
>             interrupts = <GIC_SPI 98 IRQ_TYPE_LEVEL_HIGH>;
>             clocks = <&gcc GCC_BLSP1_QUP4_SPI_APPS_CLK>,
>                  <&gcc GCC_BLSP1_AHB_CLK>;
>             clock-names = "core", "iface";
>             dmas = <&blsp_dma 18>, <&blsp_dma 19>;
>             dma-names = "tx", "rx";
>             status = "disabled";
>         };
> 
> and apart from setting the frequency and gpio there is nothing else:
>         &blsp1_spi4 {
>             status = "okay";
> 
>             pinctrl-0 = <&spi_3_pins &quartz_pins>;
>             pinctrl-names = "default";
> 
>             /* Qualcomm QCA4024 IoT */
>             iot@3 {
>                 compatible = "qca,qca4024";
>                 reg = <0>;
>                 spi-max-frequency = <24000000>;

That's your downstream or fork DTS, not hardware description. You could
have several regulators not listed here, because your downstream has
always-on, or clocks which are not taken and works due to
assigned-clocks in other places... Sorry, that's not an argument. Never
use downstream DTS as proof how hardware looks. It is usually dis-proof,
that things are certainly missing.

Best regards,
Krzysztof