brcm47xx: add support for the kernel 4.19

One patch that wasn't ported due to a lot of conflict is:
901-Revert-bcma-switch-GPIO-portions-to-use-GPIOLIB_IRQC.patch

Hopefully a correct/real fix will get developed before we switch
brcm47xx to the 4.14.

This IS NOT ready for switching/trying/using 4.19 yet due to some DMA
regression affecting bgmac:
[    0.945472] bgmac_bcma bcma0:2: Found PHY addr: 25
[    0.954565] libphy: bcma_mdio mii bus: probed
[    0.959486] ------------[ cut here ]------------
[    0.964387] WARNING: CPU: 0 PID: 1 at ./include/linux/dma-mapping.h:516 bgmac_enet_probe+0x1b4/0x5c4
[    0.973751] Modules linked in:
[    0.976913] CPU: 0 PID: 1 Comm: swapper Not tainted 4.19.9 #0
[    0.982750] Stack : 804a0000 804597c4 00000000 00000000 80458fd8 8381bc2c 838282d4 80481a47
[    0.991367]         8042e3ec 00000001 804d38f0 00000204 83980000 00000065 8381bbe0 6f55b24f
[    0.999975]         00000000 00000000 80520000 00002018 00000000 00000075 00000007 00000000
[    1.008583]         00000000 80480000 000ee811 00000000 00000000 00000000 80432c00 80248db8
[    1.017196]         00000009 00000204 83980000 803ad7b0 00000000 801feeec 00000000 804d0000
[    1.025804]         ...
[    1.028325] Call Trace:
[    1.030875] [<8000aef8>] show_stack+0x58/0x100
[    1.035513] [<8001f8b4>] __warn+0xe4/0x118
[    1.039708] [<8001f9a4>] warn_slowpath_null+0x48/0x64
[    1.044935] [<80248db8>] bgmac_enet_probe+0x1b4/0x5c4
[    1.050101] [<802498e0>] bgmac_probe+0x558/0x590
[    1.054906] [<80252fd0>] bcma_device_probe+0x38/0x70
[    1.060017] [<8020e1e8>] really_probe+0x170/0x2e8
[    1.064891] [<8020e714>] __driver_attach+0xa4/0xec
[    1.069784] [<8020c1e0>] bus_for_each_dev+0x58/0xb0
[    1.074833] [<8020d590>] bus_add_driver+0xf8/0x218
[    1.079731] [<8020ef24>] driver_register+0xcc/0x11c
[    1.084804] [<804b54cc>] bgmac_init+0x1c/0x44
[    1.089258] [<8000121c>] do_one_initcall+0x7c/0x1a0
[    1.094343] [<804a1d34>] kernel_init_freeable+0x150/0x218
[    1.099886] [<803a082c>] kernel_init+0x10/0x104
[    1.104583] [<80005878>] ret_from_kernel_thread+0x14/0x1c
[    1.110107] ---[ end trace f441c0d873d1fb5b ]---
[    1.114914] bgmac_bcma bcma0:2: Allocation of TX ring 0x200 failed
[    1.121215] bgmac_bcma bcma0:2: Unable to alloc memory for DMA
[    1.127626] bgmac_bcma: probe of bcma0:2 failed with error -12
[    1.133838] bgmac_bcma: Broadcom 47xx GBit MAC driver loaded

Signed-off-by: Rafał Miłecki <rafal@milecki.pl>

1 files changed, 30 insertions, 0 deletions

diff --git a/target/linux/brcm47xx/patches-4.19/900-ssb-reject-PCI-writes-setting-CardBus-bridge-resourc.patch b/target/linux/brcm47xx/patches-4.19/900-ssb-reject-PCI-writes-setting-CardBus-bridge-resourc.patch
new file mode 100644
index 0000000000..6b7ee06e50
--- /dev/null
+++ b/target/linux/brcm47xx/patches-4.19/900-ssb-reject-PCI-writes-setting-CardBus-bridge-resourc.patch
@@ -0,0 +1,30 @@
+From 5c81397a0147ea59c778d1de14ef54e2268221f6 Mon Sep 17 00:00:00 2001
+From: =?UTF-8?q?Rafa=C5=82=20Mi=C5=82ecki?= <zajec5@gmail.com>
+Date: Wed, 8 Apr 2015 06:58:11 +0200
+Subject: [PATCH] ssb: reject PCI writes setting CardBus bridge resources
+MIME-Version: 1.0
+Content-Type: text/plain; charset=UTF-8
+Content-Transfer-Encoding: 8bit
+
+If SoC has a CardBus we can set resources of device at slot 1 only. It's
+impossigle to set bridge resources as it simply overwrites device 1
+configuration and usually results in Data bus error-s.
+
+Signed-off-by: Rafał Miłecki <zajec5@gmail.com>
+---
+ drivers/ssb/driver_pcicore.c | 4 ++++
+ 1 file changed, 4 insertions(+)
+
+--- a/drivers/ssb/driver_pcicore.c
++++ b/drivers/ssb/driver_pcicore.c
+@@ -164,6 +164,10 @@ static int ssb_extpci_write_config(struc
+ 	WARN_ON(!pc->hostmode);
+ 	if (unlikely(len != 1 && len != 2 && len != 4))
+ 		goto out;
++	/* CardBus SoCs allow configuring dev 1 resources only */
++	if (extpci_core->cardbusmode && dev != 1 &&
++	    off >= PCI_BASE_ADDRESS_0 && off <= PCI_BASE_ADDRESS_5)
++		goto out;
+ 	addr = get_cfgspace_addr(pc, bus, dev, func, off);
+ 	if (unlikely(!addr))
+ 		goto out;