[PATCH v4 3/4] pci: layerscape: device tree fixup based on SoC and

[Wasim Khan]

lx2160a rev1 requires layerscape_gen4 device tree fixup and
lx2160a rev2 requires layerscape device tree fixup.
Add device tree fixup for lx2160a based on SoC and Version.

Signed-off-by: Wasim Khan <wasim.khan at nxp.com>
---
Changes in v4:
 remove num-lanes fixup

Changes in v3:
 Updated patch subject and description based on Priyanka Jain
 review comments

Changes in v2:
 Updated patch description based on Priyanka Jain
 review comments
 drivers/pci/pcie_layerscape_fixup.c        |  1 +
 drivers/pci/pcie_layerscape_fixup_common.c | 73 ++++++++++++++++++++++++++++++
 drivers/pci/pcie_layerscape_fixup_common.h |  1 +
 3 files changed, 75 insertions(+)

diff --git a/drivers/pci/pcie_layerscape_fixup.c b/drivers/pci/pcie_layerscape_fixup.c
index 56de6d9..ec6acbb 100644
--- a/drivers/pci/pcie_layerscape_fixup.c
+++ b/drivers/pci/pcie_layerscape_fixup.c
@@ -207,6 +207,7 @@ static void fdt_fixup_pcie_ls(void *blob)
 		fdt_pcie_set_iommu_map_entry_ls(blob, pcie, bdf >> 8,
 						streamid);
 	}
+	pcie_board_fix_fdt(blob);
 }
 #endif
 
diff --git a/drivers/pci/pcie_layerscape_fixup_common.c b/drivers/pci/pcie_layerscape_fixup_common.c
index 828dfff..b010a63 100644
--- a/drivers/pci/pcie_layerscape_fixup_common.c
+++ b/drivers/pci/pcie_layerscape_fixup_common.c
@@ -27,6 +27,79 @@ void ft_pci_setup(void *blob, bd_t *bd)
 }
 
 #if defined(CONFIG_FSL_LAYERSCAPE)
+int lx2_board_fix_fdt(void *fdt)
+{
+	char *reg_name, *old_str, *new_str;
+	const char *reg_names;
+	int names_len, old_str_len, new_str_len, remaining_str_len;
+	struct str_map {
+		char *old_str;
+		char *new_str;
+	} reg_names_map[] = {
+		{ "csr_axi_slave", "regs" },
+		{ "config_axi_slave", "config" }
+	};
+	int off = -1, i;
+
+	off = fdt_node_offset_by_compatible(fdt, -1, "fsl,lx2160a-pcie");
+	while (off != -FDT_ERR_NOTFOUND) {
+		fdt_setprop(fdt, off, "compatible", "fsl,ls2088a-pcie",
+			    strlen("fsl,ls2088a-pcie") + 1);
+
+		reg_names = fdt_getprop(fdt, off, "reg-names", &names_len);
+		if (!reg_names)
+			continue;
+		reg_name = (char *)reg_names;
+		remaining_str_len = names_len - (reg_name - reg_names);
+		i = 0;
+		while ((i < ARRAY_SIZE(reg_names_map)) && remaining_str_len) {
+			old_str = reg_names_map[i].old_str;
+			new_str = reg_names_map[i].new_str;
+			old_str_len = strlen(old_str);
+			new_str_len = strlen(new_str);
+			if (memcmp(reg_name, old_str, old_str_len) == 0) {
+				/* first only leave required bytes for new_str
+				 * and copy rest of the string after it
+				 */
+				memcpy(reg_name + new_str_len,
+				       reg_name + old_str_len,
+				       remaining_str_len - old_str_len);
+
+				/* Now copy new_str */
+				memcpy(reg_name, new_str, new_str_len);
+				names_len -= old_str_len;
+				names_len += new_str_len;
+				i++;
+			}
+
+			reg_name = memchr(reg_name, '\0', remaining_str_len);
+			if (!reg_name)
+				break;
+			reg_name += 1;
+
+			remaining_str_len = names_len - (reg_name - reg_names);
+		}
+		fdt_setprop(fdt, off, "reg-names", reg_names, names_len);
+		fdt_delprop(fdt, off, "apio-wins");
+		fdt_delprop(fdt, off, "ppio-wins");
+		off = fdt_node_offset_by_compatible(fdt, off,
+						    "fsl,lx2160a-pcie");
+	}
+	return 0;
+}
+
+int pcie_board_fix_fdt(void *fdt)
+{
+	uint svr;
+
+	svr = SVR_SOC_VER(get_svr());
+
+	if (svr == SVR_LX2160A && IS_SVR_REV(get_svr(), 2, 0))
+		return lx2_board_fix_fdt(fdt);
+
+	return 0;
+}
+
 #ifdef CONFIG_ARCH_LX2160A
 /* returns the next available streamid for pcie, -errno if failed */
 int pcie_next_streamid(int currentid, int idx)
diff --git a/drivers/pci/pcie_layerscape_fixup_common.h b/drivers/pci/pcie_layerscape_fixup_common.h
index ecf4f44..e1970a5 100644
--- a/drivers/pci/pcie_layerscape_fixup_common.h
+++ b/drivers/pci/pcie_layerscape_fixup_common.h
@@ -17,5 +17,6 @@ void ft_pci_setup_ls(void *blob, bd_t *bd);
 void ft_pci_setup_ls_gen4(void *blob, bd_t *bd);
 #endif /* CONFIG_PCIE_LAYERSCAPE_GEN4 */
 int pcie_next_streamid(int currentid, int id);
+int pcie_board_fix_fdt(void *fdt);
 
 #endif //_PCIE_LAYERSCAPE_FIXUP_COMMON_H_
-- 
2.7.4