Thread (15 messages) 15 messages, 3 authors, 2021-12-07

Re: [PATCH v1 04/10] PCI: qcom: do not duplicate qcom_pcie_cfg fields in qcom_pcie struct

From: Bjorn Helgaas <helgaas@kernel.org>
Date: 2021-12-06 19:59:22
Also in: linux-arm-msm, linux-pci, linux-phy

On Thu, Dec 02, 2021 at 05:17:20PM +0300, Dmitry Baryshkov wrote:
quoted hunk ↗ jump to hunk
In preparation to adding more flags to configuration data, use 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 flags values from one sruct to another one.

Signed-off-by: Dmitry Baryshkov <redacted>
---
 drivers/pci/controller/dwc/pcie-qcom.c | 34 ++++++++++++--------------
 1 file changed, 16 insertions(+), 18 deletions(-)
diff --git a/drivers/pci/controller/dwc/pcie-qcom.c b/drivers/pci/controller/dwc/pcie-qcom.c
index 3bee901c4df7..64f762cdbc7d 100644
--- a/drivers/pci/controller/dwc/pcie-qcom.c
+++ b/drivers/pci/controller/dwc/pcie-qcom.c
@@ -204,8 +204,7 @@ 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;
+	struct qcom_pcie_cfg cfg;
A common strategy is to simply save the pointer to the match data,
e.g.,

    struct imx6_pcie {
      ...
      const struct imx6_pcie_drvdata *drvdata;
    };

    imx6_pcie_probe()
      imx6_pcie->drvdata = of_device_get_match_data(dev);
    

    struct ls_pcie {
      ...
      const struct ls_pcie_drvdata *drvdata;
    };

    ls_pcie_probe()
      pcie->drvdata = of_device_get_match_data(dev);
    
    
    struct tegra_pcie {
      ...
      const struct tegra_pcie_soc *soc;
    };

    tegra_pcie_probe()
      pcie->soc = of_device_get_match_data(dev);
    

    struct mtk_pcie {
      ...
      const struct mtk_pcie_soc *soc;
    };

    mtk_pcie_probe()
      pcie->soc = of_device_get_match_data(dev);

Bonus points if you name the pointer the same, e.g., "soc" or maybe
"drvdata" (although this one is possibly confusing with
platform_set_drvdata(), which is something different).
quoted hunk ↗ jump to hunk
 };
 
 #define to_qcom_pcie(x)		dev_get_drvdata((x)->dev)
@@ -229,8 +228,8 @@ 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;
 }
@@ -1176,7 +1175,7 @@ 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);
@@ -1209,7 +1208,7 @@ static int qcom_pcie_init_2_7_0(struct qcom_pcie *pcie)
 	}
 
 	/* 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);
 
 	ret = clk_bulk_prepare_enable(res->num_clks, res->clks);
@@ -1287,7 +1286,7 @@ static int qcom_pcie_post_init_2_7_0(struct qcom_pcie *pcie)
 	struct qcom_pcie_resources_2_7_0 *res = &pcie->res.v2_7_0;
 
 	/* 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);
 
 	return clk_prepare_enable(res->pipe_clk);
@@ -1387,7 +1386,7 @@ 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;
 
@@ -1395,16 +1394,16 @@ static int qcom_pcie_host_init(struct pcie_port *pp)
 	if (ret)
 		goto err_deinit;
 
-	if (pcie->ops->post_init) {
-		ret = pcie->ops->post_init(pcie);
+	if (pcie->cfg.ops->post_init) {
+		ret = pcie->cfg.ops->post_init(pcie);
 		if (ret)
 			goto err_disable_phy;
 	}
 
 	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;
 	}
@@ -1413,12 +1412,12 @@ static int qcom_pcie_host_init(struct pcie_port *pp)
 
 err:
 	qcom_ep_reset_assert(pcie);
-	if (pcie->ops->post_deinit)
-		pcie->ops->post_deinit(pcie);
+	if (pcie->cfg.ops->post_deinit)
+		pcie->cfg.ops->post_deinit(pcie);
 err_disable_phy:
 	phy_power_off(pcie->phy);
 err_deinit:
-	pcie->ops->deinit(pcie);
+	pcie->cfg.ops->deinit(pcie);
 
 	return ret;
 }
@@ -1562,8 +1561,7 @@ static int qcom_pcie_probe(struct platform_device *pdev)
 		return -EINVAL;
 	}
 
-	pcie->ops = pcie_cfg->ops;
-	pcie->pipe_clk_need_muxing = pcie_cfg->pipe_clk_need_muxing;
+	pcie->cfg = *pcie_cfg;
 
 	pcie->reset = devm_gpiod_get_optional(dev, "perst", GPIOD_OUT_HIGH);
 	if (IS_ERR(pcie->reset)) {
@@ -1589,7 +1587,7 @@ static int qcom_pcie_probe(struct platform_device *pdev)
 		goto err_pm_runtime_put;
 	}
 
-	ret = pcie->ops->get_resources(pcie);
+	ret = pcie->cfg.ops->get_resources(pcie);
 	if (ret)
 		goto err_pm_runtime_put;
 
-- 
2.33.0
Keyboard shortcuts
hback out one level
jnext message in thread
kprevious message in thread
ldrill in
Escclose help / fold thread tree
?toggle this help