linux-kernel - Re: [PATCH v2 6/9] phy: qcom: Add M31 based eUSB2 PHY driver

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Message-ID: <dfpqg6u7kdvurgajufaldvpdxhe2pawmgum6ngtbbstdxrngwx@i2masto6nnwk>
Date: Wed, 5 Mar 2025 04:45:42 +0200
From: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
To: Melody Olvera <quic_molvera@...cinc.com>
Cc: Vinod Koul <vkoul@...nel.org>, 
	Kishon Vijay Abraham I <kishon@...nel.org>, Rob Herring <robh@...nel.org>, 
	Krzysztof Kozlowski <krzk+dt@...nel.org>, Conor Dooley <conor+dt@...nel.org>, 
	Wesley Cheng <quic_wcheng@...cinc.com>, Greg Kroah-Hartman <gregkh@...uxfoundation.org>, 
	Philipp Zabel <p.zabel@...gutronix.de>, Bjorn Andersson <andersson@...nel.org>, 
	Konrad Dybcio <konradybcio@...nel.org>, Catalin Marinas <catalin.marinas@....com>, 
	Will Deacon <will@...nel.org>, linux-arm-msm@...r.kernel.org, linux-phy@...ts.infradead.org, 
	devicetree@...r.kernel.org, linux-kernel@...r.kernel.org, linux-usb@...r.kernel.org, 
	linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH v2 6/9] phy: qcom: Add M31 based eUSB2 PHY driver

On Tue, Mar 04, 2025 at 01:56:39PM -0800, Melody Olvera wrote:
> From: Wesley Cheng <quic_wcheng@...cinc.com>
> 
> SM8750 utilizes an eUSB2 PHY from M31.  Add the initialization
> sequences to bring it out of reset and into an operational state.  This
> differs to the M31 USB driver, in that the M31 eUSB2 driver will
> require a connection to an eUSB2 repeater.  This PHY driver will handle
> the initialization of the associated eUSB2 repeater when required.
> 
> Signed-off-by: Wesley Cheng <quic_wcheng@...cinc.com>
> Signed-off-by: Melody Olvera <quic_molvera@...cinc.com>
> ---
>  drivers/phy/qualcomm/Kconfig              |  10 +
>  drivers/phy/qualcomm/Makefile             |   1 +
>  drivers/phy/qualcomm/phy-qcom-m31-eusb2.c | 296 ++++++++++++++++++++++++++++++
>  3 files changed, 307 insertions(+)
> 

[...]

> +
> +static int msm_m31_eusb2_write_readback(void __iomem *base, u32 offset,

m31eusb2_phy_write_readback()

> +					const u32 mask, u32 val)
> +{
> +	u32 write_val;
> +	u32 tmp;
> +

[..]

> +
> +static const struct phy_ops m31eusb2_phy_gen_ops = {
> +	.init	= m31eusb2_phy_init,
> +	.exit	= m31eusb2_phy_exit,
> +	.owner		= THIS_MODULE,

Strange alignment

> +};
> +

[...]

> +
> +	phy->phy = devm_phy_create(dev, NULL, &m31eusb2_phy_gen_ops);
> +	if (IS_ERR(phy->phy))
> +		return dev_err_probe(dev, PTR_ERR(phy->phy),
> +				     "failed to create phy\n");
> +
> +	for (i = 0; i < M31_EUSB_NUM_VREGS; i++)
> +		phy->vregs[i].supply = m31_eusb_phy_vreg_names[i];
> +
> +	ret = devm_regulator_bulk_get(dev, M31_EUSB_NUM_VREGS, phy->vregs);

devm_regulator_bulk_get_const()

> +	if (ret)
> +		return dev_err_probe(dev, ret,
> +				"failed to get regulator supplies\n");
> +
> +

[..]

> +MODULE_DESCRIPTION("eUSB2 Qualcomm M31 HSPHY driver");
> +MODULE_LICENSE("GPL");

MODULE_AUTHOR()?

> 
> -- 
> 2.46.1
> 

-- 
With best wishes
Dmitry