[U-Boot] [PATCH v2] armv8: layerscape: Manage PCIe EP compatible string via Kconfig

[Pankaj Bansal]

The ep node device tree name is governed by these bindings:
https://github.com/torvalds/linux/blob/master/Documentation/
devicetree/bindings/pci/layerscape-pci.txt#L24

As per above the ep compatible node contains platform name.
Therefore, define the ep node compatible as CONFIG to find the
pcie ep node in device tree during device tree fixup.

Signed-off-by: Pankaj Bansal <pankaj.bansal at nxp.com>
---

Notes:
    V2:
    - Modified the commit subject and body as per review comments

 arch/arm/cpu/armv8/fsl-layerscape/Kconfig | 9 +++++++++
 drivers/pci/pcie_layerscape_fixup.c       | 4 ++--
 drivers/pci/pcie_layerscape_gen4_fixup.c  | 2 +-
 3 files changed, 12 insertions(+), 3 deletions(-)

diff --git a/arch/arm/cpu/armv8/fsl-layerscape/Kconfig b/arch/arm/cpu/armv8/fsl-layerscape/Kconfig
index bc3758f607..f8e7519994 100644
--- a/arch/arm/cpu/armv8/fsl-layerscape/Kconfig
+++ b/arch/arm/cpu/armv8/fsl-layerscape/Kconfig
@@ -267,6 +267,15 @@ config FSL_PCIE_COMPAT
 	  This compatible is used to find pci controller node in Kernel DT
 	  to complete fixup.
 
+config FSL_PCIE_EP_COMPAT
+	string "PCIe EP compatible of Kernel DT"
+	depends on PCIE_LAYERSCAPE || PCIE_LAYERSCAPE_GEN4
+	default "fsl,lx2160a-pcie-ep" if ARCH_LX2160A
+	default "fsl,ls-pcie-ep"
+	help
+	  This compatible is used to find pci controller ep node in Kernel DT
+	  to complete fixup.
+
 config HAS_FEATURE_GIC64K_ALIGN
 	bool
 	default y if ARCH_LS1043A
diff --git a/drivers/pci/pcie_layerscape_fixup.c b/drivers/pci/pcie_layerscape_fixup.c
index 089e031724..194010f310 100644
--- a/drivers/pci/pcie_layerscape_fixup.c
+++ b/drivers/pci/pcie_layerscape_fixup.c
@@ -1,6 +1,6 @@
 // SPDX-License-Identifier: GPL-2.0+
 /*
- * Copyright 2017 NXP
+ * Copyright 2017-2019 NXP
  * Copyright 2014-2015 Freescale Semiconductor, Inc.
  * Layerscape PCIe driver
  */
@@ -253,7 +253,7 @@ static void ft_pcie_ep_fix(void *blob, struct ls_pcie *pcie)
 {
 	int off;
 
-	off = fdt_node_offset_by_compat_reg(blob, "fsl,ls-pcie-ep",
+	off = fdt_node_offset_by_compat_reg(blob, CONFIG_FSL_PCIE_EP_COMPAT,
 					    pcie->dbi_res.start);
 	if (off < 0)
 		return;
diff --git a/drivers/pci/pcie_layerscape_gen4_fixup.c b/drivers/pci/pcie_layerscape_gen4_fixup.c
index 1c9e5750bd..91e68eb84c 100644
--- a/drivers/pci/pcie_layerscape_gen4_fixup.c
+++ b/drivers/pci/pcie_layerscape_gen4_fixup.c
@@ -187,7 +187,7 @@ static void ft_pcie_ep_layerscape_gen4_fix(void *blob, struct ls_pcie_g4 *pcie)
 {
 	int off;
 
-	off = fdt_node_offset_by_compat_reg(blob, "fsl,lx2160a-pcie-ep",
+	off = fdt_node_offset_by_compat_reg(blob, CONFIG_FSL_PCIE_EP_COMPAT,
 					    pcie->ccsr_res.start);
 
 	if (off < 0) {
-- 
2.17.1