Re: [PATCH v4 2/6] phy: qcom-qmp-pcie: split PHY programming to separate functions

From: Johan Hovold <johan@kernel.org>
To: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Cc: "Andy Gross" <agross@kernel.org>,
	"Bjorn Andersson" <andersson@kernel.org>,
	"Konrad Dybcio" <konrad.dybcio@somainline.org>,
	"Rob Herring" <robh+dt@kernel.org>,
	"Jingoo Han" <jingoohan1@gmail.com>,
	"Gustavo Pimentel" <gustavo.pimentel@synopsys.com>,
	"Lorenzo Pieralisi" <lorenzo.pieralisi@arm.com>,
	"Krzysztof Wilczyński" <kw@linux.com>,
	"Bjorn Helgaas" <bhelgaas@google.com>,
	"Vinod Koul" <vkoul@kernel.org>,
	"Kishon Vijay Abraham I" <kishon@ti.com>,
	"Philipp Zabel" <p.zabel@pengutronix.de>,
	linux-arm-msm@vger.kernel.org, linux-pci@vger.kernel.org,
	linux-phy@lists.infradead.org
Subject: Re: [PATCH v4 2/6] phy: qcom-qmp-pcie: split PHY programming to separate functions
Date: Mon, 26 Sep 2022 09:33:31 +0200	[thread overview]
Message-ID: <YzFVyxhRidGKPR0p@hovoldconsulting.com> (raw)
In-Reply-To: <20220924160302.285875-3-dmitry.baryshkov@linaro.org>

On Sat, Sep 24, 2022 at 07:02:58PM +0300, Dmitry Baryshkov wrote:
> Split the code using PHY programming tables into separate functions,
> which take a single struct qmp_phy_cfg_tables instance.
> 
> Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
> ---
>  drivers/phy/qualcomm/phy-qcom-qmp-pcie.c | 80 ++++++++++++++----------
>  1 file changed, 48 insertions(+), 32 deletions(-)
> 
> diff --git a/drivers/phy/qualcomm/phy-qcom-qmp-pcie.c b/drivers/phy/qualcomm/phy-qcom-qmp-pcie.c
> index 30806816c8b0..6e8c74585670 100644
> --- a/drivers/phy/qualcomm/phy-qcom-qmp-pcie.c
> +++ b/drivers/phy/qualcomm/phy-qcom-qmp-pcie.c
> @@ -1877,15 +1877,53 @@ static void qmp_pcie_configure(void __iomem *base,
>  	qmp_pcie_configure_lane(base, regs, tbl, num, 0xff);
>  }
>  
> -static int qmp_pcie_serdes_init(struct qmp_phy *qphy)
> +static void qmp_pcie_serdes_init(struct qmp_phy *qphy, const struct qmp_phy_cfg_tables *tables)
>  {
>  	const struct qmp_phy_cfg *cfg = qphy->cfg;
>  	void __iomem *serdes = qphy->serdes;
>  
> -	qmp_pcie_configure(serdes, cfg->regs, cfg->common.serdes_tbl, cfg->common.serdes_tbl_num);
> -	qmp_pcie_configure(serdes, cfg->regs, cfg->extra->serdes_tbl, cfg->extra->serdes_tbl_num);
> +	if (!tables)
> +		return;
>  
> -	return 0;
> +	qmp_pcie_configure(serdes, cfg->regs, tables->serdes_tbl, tables->serdes_tbl_num);

See what I mean about "_tbl" being redundant in "tables->serdes_tbl"?

> +}

>  static int qmp_pcie_init(struct phy *phy)
> @@ -1957,15 +1995,13 @@ static int qmp_pcie_power_on(struct phy *phy)
>  	struct qmp_phy *qphy = phy_get_drvdata(phy);
>  	struct qcom_qmp *qmp = qphy->qmp;
>  	const struct qmp_phy_cfg *cfg = qphy->cfg;
> -	void __iomem *tx = qphy->tx;
> -	void __iomem *rx = qphy->rx;
>  	void __iomem *pcs = qphy->pcs;
> -	void __iomem *pcs_misc = qphy->pcs_misc;
>  	void __iomem *status;
>  	unsigned int mask, val, ready;
>  	int ret;
>  
> -	qmp_pcie_serdes_init(qphy);
> +	qmp_pcie_serdes_init(qphy, &cfg->common);
> +	qmp_pcie_serdes_init(qphy, cfg->extra);

And "common" and "extra" doesn't really say what it is you're passing
here.

>  
>  	ret = clk_prepare_enable(qphy->pipe_clk);
>  	if (ret) {

Johan