linux-kernel - Re: [PATCH 1/2] phy: qualcomm: eusb2-repeater: Fix the regfields for multiple instances

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Message-ID: <ZZcDM1CU3e1XfS/B@linaro.org>
Date: Thu, 4 Jan 2024 21:12:51 +0200
From: Abel Vesa <abel.vesa@...aro.org>
To: Bjorn Andersson <andersson@...nel.org>,
	Konrad Dybcio <konrad.dybcio@...aro.org>,
	Vinod Koul <vkoul@...nel.org>,
	Kishon Vijay Abraham I <kishon@...nel.org>
Cc: linux-arm-msm@...r.kernel.org, linux-phy@...ts.infradead.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/2] phy: qualcomm: eusb2-repeater: Fix the regfields for
 multiple instances

On 24-01-04 16:52:11, Abel Vesa wrote:
> The global regmap fields offsets currently get incremented with the base
> address of the repeater. This issue doesn't get noticed unless the probe
> defers or there are multiple repeaters on that platform. So instead of
> incrementing the global ones, copy them for each instance of the
> repeater.
> 
> Fixes: 4ba2e52718c0 ("phy: qualcomm: phy-qcom-eusb2-repeater: Use regmap_fields")
> Signed-off-by: Abel Vesa <abel.vesa@...aro.org>
> ---
>  drivers/phy/qualcomm/phy-qcom-eusb2-repeater.c | 13 ++++++++++---
>  1 file changed, 10 insertions(+), 3 deletions(-)
> 
> diff --git a/drivers/phy/qualcomm/phy-qcom-eusb2-repeater.c b/drivers/phy/qualcomm/phy-qcom-eusb2-repeater.c
> index a623f092b11f..5f5862a68b73 100644
> --- a/drivers/phy/qualcomm/phy-qcom-eusb2-repeater.c
> +++ b/drivers/phy/qualcomm/phy-qcom-eusb2-repeater.c
> @@ -101,6 +101,7 @@ struct eusb2_repeater {
>  	struct regmap_field *regs[F_NUM_FIELDS];
>  	struct phy *phy;
>  	struct regulator_bulk_data *vregs;
> +	struct reg_field *regfields;
>  	const struct eusb2_repeater_cfg *cfg;
>  	enum phy_mode mode;
>  };
> @@ -140,8 +141,8 @@ static int eusb2_repeater_init_vregs(struct eusb2_repeater *rptr)
>  
>  static int eusb2_repeater_init(struct phy *phy)
>  {
> -	struct reg_field *regfields = eusb2_repeater_tune_reg_fields;
>  	struct eusb2_repeater *rptr = phy_get_drvdata(phy);
> +	struct reg_field *regfields = rptr->regfields;

Oups, this is not needed. Will drop after I get some more comments on
this.

>  	struct device_node *np = rptr->dev->of_node;
>  	u32 init_tbl[F_NUM_TUNE_FIELDS] = { 0 };
>  	u8 override;
> @@ -262,15 +263,21 @@ static int eusb2_repeater_probe(struct platform_device *pdev)
>  	if (!regmap)
>  		return -ENODEV;
>  
> +	rptr->regfields = devm_kmemdup(dev, eusb2_repeater_tune_reg_fields,
> +				       sizeof(eusb2_repeater_tune_reg_fields),
> +				       GFP_KERNEL);
> +	if (!rptr->regfields)
> +		return -ENOMEM;
> +
>  	ret = of_property_read_u32(np, "reg", &res);
>  	if (ret < 0)
>  		return ret;
>  
>  	for (i = 0; i < F_NUM_FIELDS; i++)
> -		eusb2_repeater_tune_reg_fields[i].reg += res;
> +		rptr->regfields[i].reg += res;
>  
>  	ret = devm_regmap_field_bulk_alloc(dev, regmap, rptr->regs,
> -					   eusb2_repeater_tune_reg_fields,
> +					   rptr->regfields,
>  					   F_NUM_FIELDS);
>  	if (ret)
>  		return ret;
> 
> -- 
> 2.34.1
>