linux-kernel - Re: [PATCH v5 1/3] gpio: nuvoton: Add Nuvoton NPCM sgpio driver

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Date:   Tue, 14 Mar 2023 19:48:41 +0100
From:   Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To:     Jim Liu <jim.t90615@...il.com>, JJLIU0@...oton.com,
        KWLIU@...oton.com, linus.walleij@...aro.org, brgl@...ev.pl,
        robh+dt@...nel.org, krzysztof.kozlowski+dt@...aro.org
Cc:     linux-gpio@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, openbmc@...ts.ozlabs.org
Subject: Re: [PATCH v5 1/3] gpio: nuvoton: Add Nuvoton NPCM sgpio driver

On 14/03/2023 10:23, Jim Liu wrote:
> Add Nuvoton BMC NPCM7xx/NPCM8xx sgpio driver support.
> 
> Signed-off-by: Jim Liu <jim.t90615@...il.com>

(...)

> +	gpio->nin_sgpio = nin_gpios;
> +	gpio->nout_sgpio = nout_gpios;
> +	if (gpio->nin_sgpio > MAX_NR_HW_SGPIO || gpio->nout_sgpio > MAX_NR_HW_SGPIO) {
> +		dev_err(&pdev->dev, "Number of GPIOs exceeds the maximum of %d: input: %d output: %d\n",
> +			MAX_NR_HW_SGPIO, nin_gpios, nout_gpios);
> +		return -EINVAL;
> +	}
> +
> +	rc = device_property_read_u32(&pdev->dev, "bus-frequency", &sgpio_freq);

NAK. I don't understand that approach - you dropped it from the binding
so the binding will pass review?

> +	if (rc < 0) {
> +		dev_err(&pdev->dev, "Could not read bus-frequency property\n");
> +		return -EINVAL;
> +	}


Best regards,
Krzysztof