Re: [PATCH v5 2/5] PCI: qcom: Remove redundancy between qcom_pcie and qcom_pcie_cfg

[Bjorn Andersson <bjorn.andersson@linaro.org>]

On Sat 18 Dec 06:10 PST 2021, Dmitry Baryshkov wrote:

> In preparation to adding more flags to configuration data, use pointer
> to struct qcom_pcie_cfg directly inside struct qcom_pcie, rather than
> duplicating all its fields. This would save us from the boilerplate code
> that just copies flag values from one struct to another one.
> 

Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org>

Regards,
Bjorn

> Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
> ---
>  drivers/pci/controller/dwc/pcie-qcom.c | 31 +++++++++++---------------
>  1 file changed, 13 insertions(+), 18 deletions(-)
> 
> diff --git a/drivers/pci/controller/dwc/pcie-qcom.c b/drivers/pci/controller/dwc/pcie-qcom.c
> index 4e668da96ef4..1204011c96ee 100644
> --- a/drivers/pci/controller/dwc/pcie-qcom.c
> +++ b/drivers/pci/controller/dwc/pcie-qcom.c
> @@ -200,8 +200,7 @@ struct qcom_pcie {
>  	union qcom_pcie_resources res;
>  	struct phy *phy;
>  	struct gpio_desc *reset;
> -	const struct qcom_pcie_ops *ops;
> -	unsigned int pipe_clk_need_muxing:1;
> +	const struct qcom_pcie_cfg *cfg;
>  };
>  
>  #define to_qcom_pcie(x)		dev_get_drvdata((x)->dev)
> @@ -225,8 +224,8 @@ static int qcom_pcie_start_link(struct dw_pcie *pci)
>  	struct qcom_pcie *pcie = to_qcom_pcie(pci);
>  
>  	/* Enable Link Training state machine */
> -	if (pcie->ops->ltssm_enable)
> -		pcie->ops->ltssm_enable(pcie);
> +	if (pcie->cfg->ops->ltssm_enable)
> +		pcie->cfg->ops->ltssm_enable(pcie);
>  
>  	return 0;
>  }
> @@ -1145,7 +1144,7 @@ static int qcom_pcie_get_resources_2_7_0(struct qcom_pcie *pcie)
>  	if (ret < 0)
>  		return ret;
>  
> -	if (pcie->pipe_clk_need_muxing) {
> +	if (pcie->cfg->pipe_clk_need_muxing) {
>  		res->pipe_clk_src = devm_clk_get(dev, "pipe_mux");
>  		if (IS_ERR(res->pipe_clk_src))
>  			return PTR_ERR(res->pipe_clk_src);
> @@ -1180,7 +1179,7 @@ static int qcom_pcie_init_2_7_0(struct qcom_pcie *pcie)
>  	}
>  
>  	/* Set pipe clock as clock source for pcie_pipe_clk_src */
> -	if (pcie->pipe_clk_need_muxing)
> +	if (pcie->cfg->pipe_clk_need_muxing)
>  		clk_set_parent(res->pipe_clk_src, res->phy_pipe_clk);
>  
>  	ret = clk_bulk_prepare_enable(res->num_clks, res->clks);
> @@ -1243,7 +1242,7 @@ static void qcom_pcie_deinit_2_7_0(struct qcom_pcie *pcie)
>  	clk_bulk_disable_unprepare(res->num_clks, res->clks);
>  
>  	/* Set TCXO as clock source for pcie_pipe_clk_src */
> -	if (pcie->pipe_clk_need_muxing)
> +	if (pcie->cfg->pipe_clk_need_muxing)
>  		clk_set_parent(res->pipe_clk_src, res->ref_clk_src);
>  
>  	regulator_bulk_disable(ARRAY_SIZE(res->supplies), res->supplies);
> @@ -1336,7 +1335,7 @@ static int qcom_pcie_host_init(struct pcie_port *pp)
>  
>  	qcom_ep_reset_assert(pcie);
>  
> -	ret = pcie->ops->init(pcie);
> +	ret = pcie->cfg->ops->init(pcie);
>  	if (ret)
>  		return ret;
>  
> @@ -1346,8 +1345,8 @@ static int qcom_pcie_host_init(struct pcie_port *pp)
>  
>  	qcom_ep_reset_deassert(pcie);
>  
> -	if (pcie->ops->config_sid) {
> -		ret = pcie->ops->config_sid(pcie);
> +	if (pcie->cfg->ops->config_sid) {
> +		ret = pcie->cfg->ops->config_sid(pcie);
>  		if (ret)
>  			goto err;
>  	}
> @@ -1358,7 +1357,7 @@ static int qcom_pcie_host_init(struct pcie_port *pp)
>  	qcom_ep_reset_assert(pcie);
>  	phy_power_off(pcie->phy);
>  err_deinit:
> -	pcie->ops->deinit(pcie);
> +	pcie->cfg->ops->deinit(pcie);
>  
>  	return ret;
>  }
> @@ -1468,7 +1467,6 @@ static int qcom_pcie_probe(struct platform_device *pdev)
>  	struct pcie_port *pp;
>  	struct dw_pcie *pci;
>  	struct qcom_pcie *pcie;
> -	const struct qcom_pcie_cfg *pcie_cfg;
>  	int ret;
>  
>  	pcie = devm_kzalloc(dev, sizeof(*pcie), GFP_KERNEL);
> @@ -1485,15 +1483,12 @@ static int qcom_pcie_probe(struct platform_device *pdev)
>  
>  	pcie->pci = pci;
>  
> -	pcie_cfg = of_device_get_match_data(dev);
> -	if (!pcie_cfg || !pcie_cfg->ops) {
> +	pcie->cfg = of_device_get_match_data(dev);
> +	if (!pcie->cfg || !pcie->cfg->ops) {
>  		dev_err(dev, "Invalid platform data\n");
>  		return -EINVAL;
>  	}
>  
> -	pcie->ops = pcie_cfg->ops;
> -	pcie->pipe_clk_need_muxing = pcie_cfg->pipe_clk_need_muxing;
> -
>  	pcie->reset = devm_gpiod_get_optional(dev, "perst", GPIOD_OUT_HIGH);
>  	if (IS_ERR(pcie->reset))
>  		return PTR_ERR(pcie->reset);
> @@ -1510,7 +1505,7 @@ static int qcom_pcie_probe(struct platform_device *pdev)
>  	if (IS_ERR(pcie->phy))
>  		return PTR_ERR(pcie->phy);
>  
> -	ret = pcie->ops->get_resources(pcie);
> +	ret = pcie->cfg->ops->get_resources(pcie);
>  	if (ret)
>  		return ret;
>  
> -- 
> 2.34.1
>