linux-kernel - [PATCH v14 12/15] pci: imx6: Add helper function imx_pcie_add_lut_by

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Message-Id: <20250207-ep-msi-v14-12-9671b136f2b8@nxp.com>
Date: Fri, 07 Feb 2025 14:39:54 -0500
From: Frank Li <Frank.Li@....com>
To: Kishon Vijay Abraham I <kishon@...nel.org>, 
 "Rafael J. Wysocki" <rafael@...nel.org>, 
 Thomas Gleixner <tglx@...utronix.de>, Anup Patel <apatel@...tanamicro.com>, 
 Kishon Vijay Abraham I <kishon@...nel.org>, Marc Zyngier <maz@...nel.org>, 
 Greg Kroah-Hartman <gregkh@...uxfoundation.org>, 
 "Rafael J. Wysocki" <rafael@...nel.org>, Danilo Krummrich <dakr@...nel.org>, 
 Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>, 
 Krzysztof Wilczyński <kw@...ux.com>, 
 Kishon Vijay Abraham I <kishon@...nel.org>, 
 Bjorn Helgaas <bhelgaas@...gle.com>, Arnd Bergmann <arnd@...db.de>, 
 Shuah Khan <shuah@...nel.org>, Richard Zhu <hongxing.zhu@....com>, 
 Lucas Stach <l.stach@...gutronix.de>, 
 Lorenzo Pieralisi <lpieralisi@...nel.org>, Rob Herring <robh@...nel.org>, 
 Shawn Guo <shawnguo@...nel.org>, Sascha Hauer <s.hauer@...gutronix.de>, 
 Pengutronix Kernel Team <kernel@...gutronix.de>, 
 Fabio Estevam <festevam@...il.com>, 
 Krzysztof Kozlowski <krzk+dt@...nel.org>, 
 Conor Dooley <conor+dt@...nel.org>
Cc: Niklas Cassel <cassel@...nel.org>, dlemoal@...nel.org, jdmason@...zu.us, 
 linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org, 
 linux-pci@...r.kernel.org, linux-kselftest@...r.kernel.org, 
 imx@...ts.linux.dev, devicetree@...r.kernel.org, 
 Frank Li <Frank.Li@....com>
Subject: [PATCH v14 12/15] pci: imx6: Add helper function
 imx_pcie_add_lut_by_rid()

Add helper function imx_pcie_add_lut_by_rid(), which will be used for
Endpoint mode in the future. No functional change.

Signed-off-by: Frank Li <Frank.Li@....com>
---
change from v13 to v14
- new patch
---
 drivers/pci/controller/dwc/pci-imx6.c | 17 ++++++++++-------
 1 file changed, 10 insertions(+), 7 deletions(-)

diff --git a/drivers/pci/controller/dwc/pci-imx6.c b/drivers/pci/controller/dwc/pci-imx6.c
index 90ace941090f9..e20d91988c718 100644
--- a/drivers/pci/controller/dwc/pci-imx6.c
+++ b/drivers/pci/controller/dwc/pci-imx6.c
@@ -1028,18 +1028,14 @@ static void imx_pcie_remove_lut(struct imx_pcie *imx_pcie, u16 rid)
 	}
 }

-static int imx_pcie_enable_device(struct pci_host_bridge *bridge,
-				  struct pci_dev *pdev)
+static int imx_pcie_add_lut_by_rid(struct imx_pcie *imx_pcie, u32 rid)
 {
-	struct imx_pcie *imx_pcie = to_imx_pcie(to_dw_pcie_from_pp(bridge->sysdata));
-	u32 sid_i, sid_m, rid = pci_dev_id(pdev);
+	struct device *dev = imx_pcie->pci->dev;
 	struct device_node *target;
-	struct device *dev;
+	u32 sid_i, sid_m;
 	int err_i, err_m;
 	u32 sid = 0;

-	dev = imx_pcie->pci->dev;
-
 	target = NULL;
 	err_i = of_map_id(dev->of_node, rid, "iommu-map", "iommu-map-mask",
 			  &target, &sid_i);
@@ -1114,6 +1110,13 @@ static int imx_pcie_enable_device(struct pci_host_bridge *bridge,
 	return imx_pcie_add_lut(imx_pcie, rid, sid);
 }

+static int imx_pcie_enable_device(struct pci_host_bridge *bridge, struct pci_dev *pdev)
+{
+	struct imx_pcie *imx_pcie = to_imx_pcie(to_dw_pcie_from_pp(bridge->sysdata));
+
+	return imx_pcie_add_lut_by_rid(imx_pcie, pci_dev_id(pdev));
+}
+
 static void imx_pcie_disable_device(struct pci_host_bridge *bridge,
 				    struct pci_dev *pdev)
 {

-- 
2.34.1