[PATCH] arm64: Layerscape: Survive LPI one-way reset workaround

[Zhiqiang Hou]

From: Hou Zhiqiang <Zhiqiang.Hou at nxp.com>

The workaround of LPI one-way reset issue is broken by the series:
https://patchwork.ozlabs.org/project/uboot/list/?series=192398

This patch is to add DT node for GIC RD tables and create corresponding
reserved-memory node in kernel DT to fix it.

Signed-off-by: Hou Zhiqiang <Zhiqiang.Hou at nxp.com>
---
 arch/arm/cpu/armv8/fsl-layerscape/soc.c | 17 ++++++++++++++++-
 arch/arm/dts/fsl-ls1028a.dtsi           |  6 ++++++
 arch/arm/dts/fsl-ls1088a.dtsi           |  6 ++++++
 arch/arm/dts/fsl-ls2080a.dtsi           |  6 ++++++
 arch/arm/dts/fsl-lx2160a.dtsi           |  6 ++++++
 5 files changed, 40 insertions(+), 1 deletion(-)

diff --git a/arch/arm/cpu/armv8/fsl-layerscape/soc.c b/arch/arm/cpu/armv8/fsl-layerscape/soc.c
index fde893e8c9..53d790f395 100644
--- a/arch/arm/cpu/armv8/fsl-layerscape/soc.c
+++ b/arch/arm/cpu/armv8/fsl-layerscape/soc.c
@@ -43,7 +43,22 @@ DECLARE_GLOBAL_DATA_PTR;
 #ifdef CONFIG_GIC_V3_ITS
 int ls_gic_rd_tables_init(void *blob)
 {
-	int ret;
+	struct fdt_memory lpi_base;
+	fdt_addr_t addr;
+	fdt_size_t size;
+	int offset, ret;
+
+	offset = fdt_path_offset(gd->fdt_blob, "/syscon at 0x80000000");
+	addr = fdtdec_get_addr_size_auto_noparent(gd->fdt_blob, offset, "reg",
+						  0, &size, false);
+
+	lpi_base.start = addr;
+	lpi_base.end = addr + size - 1;
+	ret = fdtdec_add_reserved_memory(blob, "lpi_rd_table", &lpi_base, NULL);
+	if (ret) {
+		debug("%s: failed to add reserved memory\n", __func__);
+		return ret;
+	}
 
 	ret = gic_lpi_tables_init();
 	if (ret)
diff --git a/arch/arm/dts/fsl-ls1028a.dtsi b/arch/arm/dts/fsl-ls1028a.dtsi
index 9911690e5c..bf6373d5ec 100644
--- a/arch/arm/dts/fsl-ls1028a.dtsi
+++ b/arch/arm/dts/fsl-ls1028a.dtsi
@@ -44,6 +44,12 @@
 					 IRQ_TYPE_LEVEL_LOW)>;
 	};
 
+	gic_lpi_base: syscon at 0x80000000 {
+		compatible = "gic-lpi-base";
+		reg = <0x0 0x80000000 0x0 0x100000>;
+		max-gic-redistributors = <2>;
+	};
+
 	timer {
 		compatible = "arm,armv8-timer";
 		interrupts = <GIC_PPI 13 (GIC_CPU_MASK_SIMPLE(2) |
diff --git a/arch/arm/dts/fsl-ls1088a.dtsi b/arch/arm/dts/fsl-ls1088a.dtsi
index bf303c6ad3..6653794d1c 100644
--- a/arch/arm/dts/fsl-ls1088a.dtsi
+++ b/arch/arm/dts/fsl-ls1088a.dtsi
@@ -26,6 +26,12 @@
 		interrupts = <1 9 0x4>;
 	};
 
+	gic_lpi_base: syscon at 0x80000000 {
+		compatible = "gic-lpi-base";
+		reg = <0x0 0x80000000 0x0 0x100000>;
+		max-gic-redistributors = <8>;
+	};
+
 	timer {
 		compatible = "arm,armv8-timer";
 		interrupts = <1 13 0x8>, /* Physical Secure PPI, active-low */
diff --git a/arch/arm/dts/fsl-ls2080a.dtsi b/arch/arm/dts/fsl-ls2080a.dtsi
index 90a0a3f8fb..6b7bf8eb16 100644
--- a/arch/arm/dts/fsl-ls2080a.dtsi
+++ b/arch/arm/dts/fsl-ls2080a.dtsi
@@ -26,6 +26,12 @@
 		interrupts = <1 9 0x4>;
 	};
 
+	gic_lpi_base: syscon at 0x80000000 {
+		compatible = "gic-lpi-base";
+		reg = <0x0 0x80000000 0x0 0x100000>;
+		max-gic-redistributors = <8>;
+	};
+
 	timer {
 		compatible = "arm,armv8-timer";
 		interrupts = <1 13 0x8>, /* Physical Secure PPI, active-low */
diff --git a/arch/arm/dts/fsl-lx2160a.dtsi b/arch/arm/dts/fsl-lx2160a.dtsi
index dee1e2f215..37a4f39c8f 100644
--- a/arch/arm/dts/fsl-lx2160a.dtsi
+++ b/arch/arm/dts/fsl-lx2160a.dtsi
@@ -43,6 +43,12 @@
 		interrupts = <1 9 0x4>;
 	};
 
+	gic_lpi_base: syscon at 0x80000000 {
+		compatible = "gic-lpi-base";
+		reg = <0x0 0x80000000 0x0 0x200000>;
+		max-gic-redistributors = <16>;
+	};
+
 	timer {
 		compatible = "arm,armv8-timer";
 		interrupts = <1 13 0x8>, /* Physical Secure PPI, active-low */
-- 
2.17.1