mvebu: add kernel 4.19 support

Signed-off-by: Marko Ratkaj <marko.ratkaj@sartura.hr>
[added sfp related patches from Russell King]
Signed-off-by: Marek Behún <marek.behun@nic.cz>
[rebase; rework patches; separate and cleanup kernel configs;
add espessobin dts; adjust venom dts]
Signed-off-by: Tomasz Maciej Nowak <tomek_n@o2.pl>

1 files changed, 73 insertions, 0 deletions

diff --git a/target/linux/mvebu/patches-4.19/528-arm64-dts-armada-3720-espressobin-set-max-link-to-ge.patch b/target/linux/mvebu/patches-4.19/528-arm64-dts-armada-3720-espressobin-set-max-link-to-ge.patch
new file mode 100644
index 0000000000..88080d64ca
--- /dev/null
+++ b/target/linux/mvebu/patches-4.19/528-arm64-dts-armada-3720-espressobin-set-max-link-to-ge.patch
@@ -0,0 +1,73 @@
+From 33f8fdcedb01680427328d710594facef7a0092c Mon Sep 17 00:00:00 2001
+From: Tomasz Maciej Nowak <tmn505@gmail.com>
+Date: Thu, 14 Jun 2018 14:40:26 +0200
+Subject: [PATCH 2/2] arm64: dts: armada-3720-espressobin: set max link to gen1
+
+Since the beginning there's been an issue with initializing the Atheros
+based MiniPCIe wireless cards. Here's an example of kerenel log:
+
+ OF: PCI: host bridge /soc/pcie@d0070000 ranges:
+ OF: PCI:   MEM 0xe8000000..0xe8ffffff -> 0xe8000000
+ OF: PCI:    IO 0xe9000000..0xe900ffff -> 0xe9000000
+ advk-pcie d0070000.pcie: link up
+ advk-pcie d0070000.pcie: PCI host bridge to bus 0000:00
+ pci_bus 0000:00: root bus resource [bus 00-ff]
+ pci_bus 0000:00: root bus resource [mem0xe8000000-0xe8ffffff]
+ pci_bus 0000:00: root bus resource [io  0x0000-0xffff](bus address [0xe9000000-0xe900ffff])
+ pci 0000:00:00.0: BAR 0: assigned [mem0xe8000000-0xe801ffff 64bit]
+ pci 0000:00:00.0: BAR 6: assigned [mem0xe8020000-0xe802ffff pref]
+ [...]
+ advk-pcie d0070000.pcie: Posted PIO Response Status: CA,0xe00 @ 0x3c
+ advk-pcie d0070000.pcie: Posted PIO Response Status: CA,0xe00 @ 0x44
+ advk-pcie d0070000.pcie: Posted PIO Response Status: CA,0xe00 @ 0x4
+ ath9k 0000:00:00.0: enabling device (0000 -> 0002)
+ advk-pcie d0070000.pcie: Posted PIO Response Status: CA,0xe00 @ 0x3c
+ advk-pcie d0070000.pcie: Posted PIO Response Status: CA,0xe00 @ 0xc
+ advk-pcie d0070000.pcie: Posted PIO Response Status: CA,0xe00 @ 0x4
+ advk-pcie d0070000.pcie: Posted PIO Response Status: CA,0xe00 @ 0x40
+ ath9k 0000:00:00.0: request_irq failed
+ advk-pcie d0070000.pcie: Posted PIO Response Status: CA,0xe00 @ 0x4
+ ath9k: probe of 0000:00:00.0 failed with error -22
+
+The same happens for ath5k cards, while ath10k card didn't appear at
+all (not detected):
+
+ OF: PCI: host bridge /soc/pcie@d0070000 ranges:
+ OF: PCI:   MEM 0xe8000000..0xe8ffffff -> 0xe8000000
+ OF: PCI:    IO 0xe9000000..0xe900ffff -> 0xe9000000
+ advk-pcie d0070000.pcie: link never came up
+ advk-pcie d0070000.pcie: PCI host bridge to bus 0000:00
+ pci_bus 0000:00: root bus resource [bus 00-ff]
+ pci_bus 0000:00: root bus resource [mem0xe8000000-0xe8ffffff]
+ pci_bus 0000:00: root bus resource [io  0x0000-0xffff](bus address [0xe9000000-0xe900ffff])
+ advk-pcie d0070000.pcie: config read/write timed out
+
+Following the issue on esppressobin.net forum [1] the workaround seems
+to be limiting the speed of PCIe bridge to 1st generation. This fixed
+the initialisation of all tested Atheros wireless cards.
+The patch in the forum thread swaped registers which would limit speed
+for all Armada 3700 based boards. The approach in this patch, in
+conjunction with "PCI: aardvark: allow to specify link capability" patch
+is less invasive, it only touches the affected board.
+
+For the record, the iwlwifi and mt76 cards were not affected by this
+issue.
+
+1. http://espressobin.net/forums/topic/which-pcie-wlan-cards-are-supported
+
+Signed-off-by: Tomasz Maciej Nowak <tmn505@gmail.com>
+---
+ arch/arm64/boot/dts/marvell/armada-3720-espressobin.dts | 2 ++
+ 1 file changed, 2 insertions(+)
+
+--- a/arch/arm64/boot/dts/marvell/armada-3720-espressobin.dts
++++ b/arch/arm64/boot/dts/marvell/armada-3720-espressobin.dts
+@@ -46,6 +46,8 @@
+ /* J9 */
+ &pcie0 {
+ 	status = "okay";
++
++	max-link-speed = <1>;
+ };
+ 
+ /* J6 */