[PATCH v2] mvebu/omnia: enable hardware buffer management

[Rui Salvaterra]

Backport (and fix [1]) the required device tree changes in order to support
hardware buffer management on the Turris Omnia.

[1] https://lore.kernel.org/linux-arm-kernel/20210217164232.25a7765c@kernel.org/

Signed-off-by: Rui Salvaterra <rsalvaterra at gmail.com>
---
 ...is-omnia-enable-HW-buffer-management.patch | 83 +++++++++++++++++++
 1 file changed, 83 insertions(+)
 create mode 100644 target/linux/mvebu/patches-5.4/317-ARM-dts-turris-omnia-enable-HW-buffer-management.patch

diff --git a/target/linux/mvebu/patches-5.4/317-ARM-dts-turris-omnia-enable-HW-buffer-management.patch b/target/linux/mvebu/patches-5.4/317-ARM-dts-turris-omnia-enable-HW-buffer-management.patch
new file mode 100644
index 0000000000..3420edf075
--- /dev/null
+++ b/target/linux/mvebu/patches-5.4/317-ARM-dts-turris-omnia-enable-HW-buffer-management.patch
@@ -0,0 +1,83 @@
+From 23f0ff99446cf27cdc73f794a9d767e6af05e11c Mon Sep 17 00:00:00 2001
+From: =?UTF-8?q?Marek=20Beh=C3=BAn?= <kabel at kernel.org>
+Date: Sun, 15 Nov 2020 14:59:17 +0100
+Subject: [PATCH 1/2] ARM: dts: turris-omnia: enable HW buffer management
+MIME-Version: 1.0
+Content-Type: text/plain; charset=UTF-8
+Content-Transfer-Encoding: 8bit
+
+The buffer manager is available on Turris Omnia but needs to be
+described in device-tree to be used.
+
+Signed-off-by: Marek Behún <kabel at kernel.org>
+Fixes: 26ca8b52d6e1 ("ARM: dts: add support for Turris Omnia")
+Cc: linux-arm-kernel at lists.infradead.org
+Cc: Uwe Kleine-König <uwe at kleine-koenig.org>
+Cc: Jason Cooper <jason at lakedaemon.net>
+Cc: Gregory CLEMENT <gregory.clement at bootlin.com>
+Cc: Andreas Färber <afaerber at suse.de>
+Cc: Andrew Lunn <andrew at lunn.ch>
+Cc: Rob Herring <robh+dt at kernel.org>
+Cc: devicetree at vger.kernel.org
+Signed-off-by: Gregory CLEMENT <gregory.clement at bootlin.com>
+Signed-off-by: Rui Salvaterra <rsalvaterra at gmail.com>
+---
+ arch/arm/boot/dts/armada-385-turris-omnia.dts | 17 +++++++++++++++++
+ 1 file changed, 17 insertions(+)
+
+--- a/arch/arm/boot/dts/armada-385-turris-omnia.dts
++++ b/arch/arm/boot/dts/armada-385-turris-omnia.dts
+@@ -31,7 +31,8 @@
+ 		ranges = <MBUS_ID(0xf0, 0x01) 0 0xf1000000 0x100000
+ 			  MBUS_ID(0x01, 0x1d) 0 0xfff00000 0x100000
+ 			  MBUS_ID(0x09, 0x19) 0 0xf1100000 0x10000
+-			  MBUS_ID(0x09, 0x15) 0 0xf1110000 0x10000>;
++			  MBUS_ID(0x09, 0x15) 0 0xf1110000 0x10000
++			  MBUS_ID(0x0c, 0x04) 0 0xf1200000 0x100000>;
+ 
+ 		internal-regs {
+ 
+@@ -84,12 +85,23 @@
+ 	};
+ };
+ 
++&bm {
++	status = "okay";
++};
++
++&bm_bppi {
++	status = "okay";
++};
++
+ /* Connected to 88E6176 switch, port 6 */
+ &eth0 {
+ 	pinctrl-names = "default";
+ 	pinctrl-0 = <&ge0_rgmii_pins>;
+ 	status = "okay";
+ 	phy-mode = "rgmii";
++	buffer-manager = <&bm>;
++	bm,pool-long = <0>;
++	bm,pool-short = <3>;
+ 
+ 	fixed-link {
+ 		speed = <1000>;
+@@ -103,6 +115,9 @@
+ 	pinctrl-0 = <&ge1_rgmii_pins>;
+ 	status = "okay";
+ 	phy-mode = "rgmii";
++	buffer-manager = <&bm>;
++	bm,pool-long = <1>;
++	bm,pool-short = <3>;
+ 
+ 	fixed-link {
+ 		speed = <1000>;
+@@ -115,6 +130,9 @@
+ 	status = "okay";
+ 	phy-mode = "sgmii";
+ 	phy = <&phy1>;
++	buffer-manager = <&bm>;
++	bm,pool-long = <2>;
++	bm,pool-short = <3>;
+ };
+ 
+ &i2c0 {
-- 
2.30.1