linux-kernel - Re: [PATCH v3 2/2] phy: nuvoton: add new driver for the Nuvoton MA35 SoC USB 2.0 PHY

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Message-ID: <85bd5da2-312e-4d25-a4e9-afae4fedbd50@kernel.org>
Date: Thu, 1 Aug 2024 16:43:56 +0200
From: Krzysztof Kozlowski <krzk@...nel.org>
To: Hui-Ping Chen <hpchen0nvt@...il.com>, vkoul@...nel.org,
 kishon@...nel.org, robh@...nel.org, krzk+dt@...nel.org, conor+dt@...nel.org
Cc: linux-arm-kernel@...ts.infradead.org, linux-phy@...ts.infradead.org,
 devicetree@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v3 2/2] phy: nuvoton: add new driver for the Nuvoton MA35
 SoC USB 2.0 PHY

On 01/08/2024 07:37, Hui-Ping Chen wrote:
> +	struct regmap *sysreg;

Look here - iomem? No.

> +};
> +
> +static int ma35_usb_phy_power_on(struct phy *phy)
> +{
> +	struct ma35_usb_phy *p_phy = phy_get_drvdata(phy);
> +	unsigned int val;
> +	int ret;
> +
> +	ret = clk_prepare_enable(p_phy->clk);
> +	if (ret < 0) {
> +		dev_err(p_phy->dev, "Failed to enable PHY clock: %d\n", ret);
> +		return ret;
> +	}
> +
> +	regmap_read(p_phy->sysreg, MA35_SYS_REG_USBPMISCR, &val);
> +	if (val & PHY0SUSPEND) {
> +		/*
> +		 * USB PHY0 is in operation mode already
> +		 * make sure USB PHY 60 MHz UTMI Interface Clock ready
> +		 */
> +		ret = readl_poll_timeout((void __iomem *)p_phy->sysreg + MA35_SYS_REG_USBPMISCR,

Eh, I responded to v2, not here, so repeating:

sysreg is a regmap, not io address. How could it possibly work and be
tested?!? This cannot work. Test your code *before* sending it.


Best regards,
Krzysztof