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, 121 insertions, 0 deletions

diff --git a/target/linux/brcm47xx/patches-4.19/209-b44-register-adm-switch.patch b/target/linux/brcm47xx/patches-4.19/209-b44-register-adm-switch.patch
new file mode 100644
index 0000000000..3706591b00
--- /dev/null
+++ b/target/linux/brcm47xx/patches-4.19/209-b44-register-adm-switch.patch
@@ -0,0 +1,121 @@
+From b36f694256f41bc71571f467646d015dda128d14 Mon Sep 17 00:00:00 2001
+From: Hauke Mehrtens <hauke@hauke-m.de>
+Date: Sat, 9 Nov 2013 17:03:59 +0100
+Subject: [PATCH 210/210] b44: register adm switch
+
+---
+ drivers/net/ethernet/broadcom/b44.c |   57 +++++++++++++++++++++++++++++++++++
+ drivers/net/ethernet/broadcom/b44.h |    3 ++
+ 2 files changed, 60 insertions(+)
+
+--- a/drivers/net/ethernet/broadcom/b44.c
++++ b/drivers/net/ethernet/broadcom/b44.c
+@@ -31,6 +31,8 @@
+ #include <linux/ssb/ssb.h>
+ #include <linux/slab.h>
+ #include <linux/phy.h>
++#include <linux/platform_device.h>
++#include <linux/platform_data/adm6996-gpio.h>
+ 
+ #include <linux/uaccess.h>
+ #include <asm/io.h>
+@@ -2246,6 +2248,69 @@ static void b44_adjust_link(struct net_d
+ 	}
+ }
+ 
++#ifdef CONFIG_BCM47XX
++static int b44_register_adm_switch(struct b44 *bp)
++{
++	int gpio;
++	struct platform_device *pdev;
++	struct adm6996_gpio_platform_data adm_data = {0};
++	struct platform_device_info info = {0};
++
++	adm_data.model = ADM6996L;
++	gpio = bcm47xx_nvram_gpio_pin("adm_eecs");
++	if (gpio >= 0)
++		adm_data.eecs = gpio;
++	else
++		adm_data.eecs = 2;
++
++	gpio = bcm47xx_nvram_gpio_pin("adm_eesk");
++	if (gpio >= 0)
++		adm_data.eesk = gpio;
++	else
++		adm_data.eesk = 3;
++
++	gpio = bcm47xx_nvram_gpio_pin("adm_eedi");
++	if (gpio >= 0)
++		adm_data.eedi = gpio;
++	else
++		adm_data.eedi = 4;
++
++	/*
++	 * We ignore the "adm_rc" GPIO here. The driver does not use it,
++	 * and it conflicts with the Reset button GPIO on the Linksys WRT54GSv1.
++	 */
++
++	info.parent = bp->sdev->dev;
++	info.name = "adm6996_gpio";
++	info.id = -1;
++	info.data = &adm_data;
++	info.size_data = sizeof(adm_data);
++
++	if (!bp->adm_switch) {
++		pdev = platform_device_register_full(&info);
++		if (IS_ERR(pdev))
++			return PTR_ERR(pdev);
++
++		bp->adm_switch = pdev;
++	}
++	return 0;
++}
++static void b44_unregister_adm_switch(struct b44 *bp)
++{
++	if (bp->adm_switch)
++		platform_device_unregister(bp->adm_switch);
++}
++#else
++static int b44_register_adm_switch(struct b44 *bp)
++{
++	return 0;
++}
++static void b44_unregister_adm_switch(struct b44 *bp)
++{
++
++}
++#endif /* CONFIG_BCM47XX */
++
+ static int b44_register_phy_one(struct b44 *bp)
+ {
+ 	struct mii_bus *mii_bus;
+@@ -2281,6 +2346,9 @@ static int b44_register_phy_one(struct b
+ 	if (!mdiobus_is_registered_device(bp->mii_bus, bp->phy_addr) &&
+ 	    (sprom->boardflags_lo & (B44_BOARDFLAG_ROBO | B44_BOARDFLAG_ADM))) {
+ 
++		if (sprom->boardflags_lo & B44_BOARDFLAG_ADM)
++			b44_register_adm_switch(bp);
++
+ 		dev_info(sdev->dev,
+ 			 "could not find PHY at %i, use fixed one\n",
+ 			 bp->phy_addr);
+@@ -2475,6 +2543,7 @@ static void b44_remove_one(struct ssb_de
+ 	unregister_netdev(dev);
+ 	if (bp->flags & B44_FLAG_EXTERNAL_PHY)
+ 		b44_unregister_phy_one(bp);
++	b44_unregister_adm_switch(bp);
+ 	ssb_device_disable(sdev, 0);
+ 	ssb_bus_may_powerdown(sdev->bus);
+ 	netif_napi_del(&bp->napi);
+--- a/drivers/net/ethernet/broadcom/b44.h
++++ b/drivers/net/ethernet/broadcom/b44.h
+@@ -408,6 +408,9 @@ struct b44 {
+ 	struct mii_bus		*mii_bus;
+ 	int			old_link;
+ 	struct mii_if_info	mii_if;
++
++	/* platform device for associated switch */
++	struct platform_device *adm_switch;
+ };
+ 
+ #endif /* _B44_H */