[PATCH v3 5/6] arm64: dts: rockchip: add missing mandatory rk3588 PCIe atu reg

[Niklas Cassel]

From: Niklas Cassel <niklas.cassel at wdc.com>

>From the snps,dw-pcie.yaml devicetree binding:
"At least DBI reg-space and peripheral devices CFG-space outbound window
are required for the normal controller work. iATU memory IO region is
also required if the space is unrolled (IP-core version >= 4.80a)."

All the PCIe controllers in rk3588 are using the iATU unroll feature,
and thus have to supply the atu reg in the device tree node.

Without this patch, the driver will not be able to detect all the inbound
and outbound iATUs. (The default iATU range that is used by by the driver,
when no atu reg is found, allows the driver to detect up to a maximum
of 8 inbound and 8 outbound iATUs.)

On the rk3588 based rock-5b board:
Before this patch, dw_pcie_iatu_detect() fails to detect all iATUs:
rockchip-dw-pcie a40000000.pcie: iATU: unroll T, 8 ob, 8 ib, align 64K, limit 8G
rockchip-dw-pcie a41000000.pcie: iATU: unroll T, 8 ob, 8 ib, align 64K, limit 8G
rockchip-dw-pcie a40800000.pcie: iATU: unroll T, 8 ob, 8 ib, align 64K, limit 8G

After this patch, dw_pcie_iatu_detect() succeeds to detect all iATUs:
rockchip-dw-pcie a40000000.pcie: iATU: unroll T, 16 ob, 16 ib, align 64K, limit 8G
rockchip-dw-pcie a41000000.pcie: iATU: unroll T, 8 ob, 8 ib, align 64K, limit 8G
rockchip-dw-pcie a40800000.pcie: iATU: unroll T, 8 ob, 8 ib, align 64K, limit 8G

Fixes: 8d81b77f4c49 ("arm64: dts: rockchip: add rk3588 PCIe2 support")
Fixes: 0acf4fa7f187 ("arm64: dts: rockchip: add PCIe3 support for rk3588")
Signed-off-by: Niklas Cassel <niklas.cassel at wdc.com>
---
 arch/arm64/boot/dts/rockchip/rk3588.dtsi  | 21 ++++++++++++---------
 arch/arm64/boot/dts/rockchip/rk3588s.dtsi | 14 ++++++++------
 2 files changed, 20 insertions(+), 15 deletions(-)

diff --git a/arch/arm64/boot/dts/rockchip/rk3588.dtsi b/arch/arm64/boot/dts/rockchip/rk3588.dtsi
index 5519c1430cb7..28955acda9f2 100644
--- a/arch/arm64/boot/dts/rockchip/rk3588.dtsi
+++ b/arch/arm64/boot/dts/rockchip/rk3588.dtsi
@@ -119,10 +119,11 @@ pcie3x4: pcie at fe150000 {
 		ranges = <0x01000000 0x0 0xf0100000 0x0 0xf0100000 0x0 0x00100000>,
 			 <0x02000000 0x0 0xf0200000 0x0 0xf0200000 0x0 0x00e00000>,
 			 <0x03000000 0x0 0x40000000 0x9 0x00000000 0x0 0x40000000>;
-		reg = <0xa 0x40000000 0x0 0x00400000>,
+		reg = <0xa 0x40000000 0x0 0x00300000>,
 		      <0x0 0xfe150000 0x0 0x00010000>,
-		      <0x0 0xf0000000 0x0 0x00100000>;
-		reg-names = "dbi", "apb", "config";
+		      <0x0 0xf0000000 0x0 0x00100000>,
+		      <0xa 0x40300000 0x0 0x00100000>;
+		reg-names = "dbi", "apb", "config", "atu";
 		resets = <&cru SRST_PCIE0_POWER_UP>, <&cru SRST_P_PCIE0>;
 		reset-names = "pwr", "pipe";
 		status = "disabled";
@@ -170,10 +171,11 @@ pcie3x2: pcie at fe160000 {
 		ranges = <0x01000000 0x0 0xf1100000 0x0 0xf1100000 0x0 0x00100000>,
 			 <0x02000000 0x0 0xf1200000 0x0 0xf1200000 0x0 0x00e00000>,
 			 <0x03000000 0x0 0x40000000 0x9 0x40000000 0x0 0x40000000>;
-		reg = <0xa 0x40400000 0x0 0x00400000>,
+		reg = <0xa 0x40400000 0x0 0x00300000>,
 		      <0x0 0xfe160000 0x0 0x00010000>,
-		      <0x0 0xf1000000 0x0 0x00100000>;
-		reg-names = "dbi", "apb", "config";
+		      <0x0 0xf1000000 0x0 0x00100000>,
+		      <0xa 0x40700000 0x0 0x00100000>;
+		reg-names = "dbi", "apb", "config", "atu";
 		resets = <&cru SRST_PCIE1_POWER_UP>, <&cru SRST_P_PCIE1>;
 		reset-names = "pwr", "pipe";
 		status = "disabled";
@@ -219,10 +221,11 @@ pcie2x1l0: pcie at fe170000 {
 		ranges = <0x01000000 0x0 0xf2100000 0x0 0xf2100000 0x0 0x00100000>,
 			 <0x02000000 0x0 0xf2200000 0x0 0xf2200000 0x0 0x00e00000>,
 			 <0x03000000 0x0 0x40000000 0x9 0x80000000 0x0 0x40000000>;
-		reg = <0xa 0x40800000 0x0 0x00400000>,
+		reg = <0xa 0x40800000 0x0 0x00300000>,
 		      <0x0 0xfe170000 0x0 0x00010000>,
-		      <0x0 0xf2000000 0x0 0x00100000>;
-		reg-names = "dbi", "apb", "config";
+		      <0x0 0xf2000000 0x0 0x00100000>,
+		      <0xa 0x40b00000 0x0 0x00100000>;
+		reg-names = "dbi", "apb", "config", "atu";
 		resets = <&cru SRST_PCIE2_POWER_UP>, <&cru SRST_P_PCIE2>;
 		reset-names = "pwr", "pipe";
 		#address-cells = <3>;
diff --git a/arch/arm64/boot/dts/rockchip/rk3588s.dtsi b/arch/arm64/boot/dts/rockchip/rk3588s.dtsi
index 5544f66c6ff4..60e02a5145e7 100644
--- a/arch/arm64/boot/dts/rockchip/rk3588s.dtsi
+++ b/arch/arm64/boot/dts/rockchip/rk3588s.dtsi
@@ -1259,10 +1259,11 @@ pcie2x1l1: pcie at fe180000 {
 		ranges = <0x01000000 0x0 0xf3100000 0x0 0xf3100000 0x0 0x00100000>,
 			 <0x02000000 0x0 0xf3200000 0x0 0xf3200000 0x0 0x00e00000>,
 			 <0x03000000 0x0 0x40000000 0x9 0xc0000000 0x0 0x40000000>;
-		reg = <0xa 0x40c00000 0x0 0x00400000>,
+		reg = <0xa 0x40c00000 0x0 0x00300000>,
 		      <0x0 0xfe180000 0x0 0x00010000>,
-		      <0x0 0xf3000000 0x0 0x00100000>;
-		reg-names = "dbi", "apb", "config";
+		      <0x0 0xf3000000 0x0 0x00100000>,
+		      <0xa 0x40f00000 0x0 0x00100000>;
+		reg-names = "dbi", "apb", "config", "atu";
 		resets = <&cru SRST_PCIE3_POWER_UP>, <&cru SRST_P_PCIE3>;
 		reset-names = "pwr", "pipe";
 		#address-cells = <3>;
@@ -1310,10 +1311,11 @@ pcie2x1l2: pcie at fe190000 {
 		ranges = <0x01000000 0x0 0xf4100000 0x0 0xf4100000 0x0 0x00100000>,
 			 <0x02000000 0x0 0xf4200000 0x0 0xf4200000 0x0 0x00e00000>,
 			 <0x03000000 0x0 0x40000000 0xa 0x00000000 0x0 0x40000000>;
-		reg = <0xa 0x41000000 0x0 0x00400000>,
+		reg = <0xa 0x41000000 0x0 0x00300000>,
 		      <0x0 0xfe190000 0x0 0x00010000>,
-		      <0x0 0xf4000000 0x0 0x00100000>;
-		reg-names = "dbi", "apb", "config";
+		      <0x0 0xf4000000 0x0 0x00100000>,
+		      <0xa 0x41300000 0x0 0x00100000>;
+		reg-names = "dbi", "apb", "config", "atu";
 		resets = <&cru SRST_PCIE4_POWER_UP>, <&cru SRST_P_PCIE4>;
 		reset-names = "pwr", "pipe";
 		#address-cells = <3>;
-- 
2.41.0