brcm2708: add kernel 4.14 support

Patch generation process:
- rebase rpi/rpi-4.14.y on v4.14.89 from linux-stable
- git format-patch v4.14.89

Patches skipped during rebase:
- lan78xx: Read MAC address from DT if present
- lan78xx: Enable LEDs and auto-negotiation
- Revert "softirq: Let ksoftirqd do its job"
- sc16is7xx: Fix for multi-channel stall
- lan78xx: Ignore DT MAC address if already valid
- lan78xx: Simple patch to prevent some crashes
- tcp_write_queue_purge clears all the SKBs in the write queue
- Revert "lan78xx: Simple patch to prevent some crashes"
- lan78xx: Connect phy early
- Arm: mm: ftrace: Only set text back to ro after kernel has been marked ro
- Revert "Revert "softirq: Let ksoftirqd do its job""
- ASoC: cs4265: SOC_SINGLE register value error fix
- Revert "ASoC: cs4265: SOC_SINGLE register value error fix"
- Revert "net: pskb_trim_rcsum() and CHECKSUM_COMPLETE are friends"
- Revert "Revert "net: pskb_trim_rcsum() and CHECKSUM_COMPLETE are friends""

Patches dropped after rebase:
- net: Add non-mainline source for rtl8192cu wlan
- net: Fix rtl8192cu build errors on other platforms
- brcm: adds support for BCM43341 wifi
- brcmfmac: Mute expected startup 'errors'
- ARM64: Fix build break for RTL8187/RTL8192CU wifi
- ARM64: Enable RTL8187/RTL8192CU wifi in build config
- This is the driver for Sony CXD2880 DVB-T2/T tuner + demodulator
- brcmfmac: add CLM download support
- brcmfmac: request_firmware_direct is quieter
- Sets the BCDC priority to constant 0
- brcmfmac: Disable ARP offloading when promiscuous
- brcmfmac: Avoid possible out-of-bounds read
- brcmfmac: Delete redundant length check
- net: rtl8192cu: Normalize indentation
- net: rtl8192cu: Fix implicit fallthrough warnings
- Revert "Sets the BCDC priority to constant 0"
- media: cxd2880: Bump to match 4.18.y version
- media: cxd2880-spi: Bump to match 4.18.y version
- Revert "mm: alloc_contig: re-allow CMA to compact FS pages"
- Revert "Revert "mm: alloc_contig: re-allow CMA to compact FS pages""
- cxd2880: CXD2880_SPI_DRV should select DVB_CXD2880 with
  MEDIA_SUBDRV_AUTOSELECT
- 950-0421-HID-hid-bigbenff-driver-for-BigBen-Interactive-PS3OF.patch
- 950-0453-Add-hid-bigbenff-to-list-of-have_special_driver-for-.patch

Make I2C built-in instead of modular as in upstream defconfig; also the
easiest way to get MFD_ARIZONA enabled, which is required by
kmod-sound-soc-rpi-cirrus.
Add missing compatible strings from
4.9/960-add-rasbperrypi-compatible.patch, using upstream names for
compute modules.
Add extra patch to enable the LEDs on lan78xx.

Compile-tested: bcm2708, bcm2709, bcm2710 (with CONFIG_ALL_KMODS=y)
Runtime-tested: bcm2708, bcm2710

Signed-off-by: Stijn Tintel <stijn@linux-ipv6.be>

1 files changed, 256 insertions, 0 deletions

diff --git a/target/linux/brcm2708/patches-4.14/950-0090-bcm2835-virtgpio-Virtual-GPIO-driver.patch b/target/linux/brcm2708/patches-4.14/950-0090-bcm2835-virtgpio-Virtual-GPIO-driver.patch
new file mode 100644
index 0000000000..8b200eb725
--- /dev/null
+++ b/target/linux/brcm2708/patches-4.14/950-0090-bcm2835-virtgpio-Virtual-GPIO-driver.patch
@@ -0,0 +1,256 @@
+From 4d08e9c723d8fcd0d86e1d779b0e720cab95383a Mon Sep 17 00:00:00 2001
+From: popcornmix <popcornmix@gmail.com>
+Date: Tue, 23 Feb 2016 19:56:04 +0000
+Subject: [PATCH 090/454] bcm2835-virtgpio: Virtual GPIO driver
+
+Add a virtual GPIO driver that uses the firmware mailbox interface to
+request that the VPU toggles LEDs.
+---
+ drivers/gpio/Kconfig         |   6 +
+ drivers/gpio/Makefile        |   1 +
+ drivers/gpio/gpio-bcm-virt.c | 214 +++++++++++++++++++++++++++++++++++
+ 3 files changed, 221 insertions(+)
+ create mode 100644 drivers/gpio/gpio-bcm-virt.c
+
+--- a/drivers/gpio/Kconfig
++++ b/drivers/gpio/Kconfig
+@@ -134,6 +134,12 @@ config GPIO_BCM_KONA
+ 	help
+ 	  Turn on GPIO support for Broadcom "Kona" chips.
+ 
++config GPIO_BCM_VIRT
++	bool "Broadcom Virt GPIO"
++	depends on OF_GPIO && RASPBERRYPI_FIRMWARE && (ARCH_BCM2835 || COMPILE_TEST)
++	help
++	  Turn on virtual GPIO support for Broadcom BCM283X chips.
++
+ config GPIO_BRCMSTB
+ 	tristate "BRCMSTB GPIO support"
+ 	default y if (ARCH_BRCMSTB || BMIPS_GENERIC)
+--- a/drivers/gpio/Makefile
++++ b/drivers/gpio/Makefile
+@@ -35,6 +35,7 @@ obj-$(CONFIG_GPIO_ASPEED)	+= gpio-aspeed
+ obj-$(CONFIG_GPIO_AXP209)	+= gpio-axp209.o
+ obj-$(CONFIG_GPIO_BCM_KONA)	+= gpio-bcm-kona.o
+ obj-$(CONFIG_GPIO_BD9571MWV)	+= gpio-bd9571mwv.o
++obj-$(CONFIG_GPIO_BCM_VIRT)	+= gpio-bcm-virt.o
+ obj-$(CONFIG_GPIO_BRCMSTB)	+= gpio-brcmstb.o
+ obj-$(CONFIG_GPIO_BT8XX)	+= gpio-bt8xx.o
+ obj-$(CONFIG_GPIO_CLPS711X)	+= gpio-clps711x.o
+--- /dev/null
++++ b/drivers/gpio/gpio-bcm-virt.c
+@@ -0,0 +1,214 @@
++/*
++ *  brcmvirt GPIO driver
++ *
++ *  Copyright (C) 2012,2013 Dom Cobley <popcornmix@gmail.com>
++ *  Based on gpio-clps711x.c by Alexander Shiyan <shc_work@mail.ru>
++ *
++ * This program is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU General Public License as published by
++ * the Free Software Foundation; either version 2 of the License, or
++ * (at your option) any later version.
++ */
++
++#include <linux/err.h>
++#include <linux/gpio.h>
++#include <linux/module.h>
++#include <linux/platform_device.h>
++#include <linux/dma-mapping.h>
++#include <soc/bcm2835/raspberrypi-firmware.h>
++
++#define MODULE_NAME "brcmvirt-gpio"
++#define NUM_GPIO 2
++
++struct brcmvirt_gpio {
++	struct gpio_chip	gc;
++	u32 __iomem		*ts_base;
++	/* two packed 16-bit counts of enabled and disables
++           Allows host to detect a brief enable that was missed */
++	u32			enables_disables[NUM_GPIO];
++	dma_addr_t		bus_addr;
++};
++
++static int brcmvirt_gpio_dir_in(struct gpio_chip *gc, unsigned off)
++{
++	struct brcmvirt_gpio *gpio;
++	gpio = container_of(gc, struct brcmvirt_gpio, gc);
++	return -EINVAL;
++}
++
++static int brcmvirt_gpio_dir_out(struct gpio_chip *gc, unsigned off, int val)
++{
++	struct brcmvirt_gpio *gpio;
++	gpio = container_of(gc, struct brcmvirt_gpio, gc);
++	return 0;
++}
++
++static int brcmvirt_gpio_get(struct gpio_chip *gc, unsigned off)
++{
++	struct brcmvirt_gpio *gpio;
++	unsigned v;
++	gpio = container_of(gc, struct brcmvirt_gpio, gc);
++	v = readl(gpio->ts_base + off);
++	return (v >> off) & 1;
++}
++
++static void brcmvirt_gpio_set(struct gpio_chip *gc, unsigned off, int val)
++{
++	struct brcmvirt_gpio *gpio;
++	u16 enables, disables;
++	s16 diff;
++	bool lit;
++	gpio = container_of(gc, struct brcmvirt_gpio, gc);
++	enables  = gpio->enables_disables[off] >> 16;
++	disables = gpio->enables_disables[off] >>  0;
++	diff = (s16)(enables - disables);
++	lit = diff > 0;
++	if ((val && lit) || (!val && !lit))
++		return;
++	if (val)
++		enables++;
++	else
++		disables++;
++	diff = (s16)(enables - disables);
++	BUG_ON(diff != 0 && diff != 1);
++	gpio->enables_disables[off] = (enables << 16) | (disables << 0);
++	writel(gpio->enables_disables[off], gpio->ts_base + off);
++}
++
++static int brcmvirt_gpio_probe(struct platform_device *pdev)
++{
++	int err = 0;
++	struct device *dev = &pdev->dev;
++	struct device_node *np = dev->of_node;
++	struct device_node *fw_node;
++	struct rpi_firmware *fw;
++	struct brcmvirt_gpio *ucb;
++	u32 gpiovirtbuf;
++
++	fw_node = of_parse_phandle(np, "firmware", 0);
++	if (!fw_node) {
++		dev_err(dev, "Missing firmware node\n");
++		return -ENOENT;
++	}
++
++	fw = rpi_firmware_get(fw_node);
++	if (!fw)
++		return -EPROBE_DEFER;
++
++	ucb = devm_kzalloc(dev, sizeof *ucb, GFP_KERNEL);
++	if (!ucb) {
++		err = -EINVAL;
++		goto out;
++	}
++
++	ucb->ts_base = dma_zalloc_coherent(dev, PAGE_SIZE, &ucb->bus_addr, GFP_KERNEL);
++	if (!ucb->ts_base) {
++		pr_err("[%s]: failed to dma_alloc_coherent(%ld)\n",
++				__func__, PAGE_SIZE);
++		err = -ENOMEM;
++		goto out;
++	}
++
++	gpiovirtbuf = (u32)ucb->bus_addr;
++	err = rpi_firmware_property(fw, RPI_FIRMWARE_FRAMEBUFFER_SET_GPIOVIRTBUF,
++				    &gpiovirtbuf, sizeof(gpiovirtbuf));
++
++	if (err || gpiovirtbuf != 0) {
++		dev_warn(dev, "Failed to set gpiovirtbuf, trying to get err:%x\n", err);
++		dma_free_coherent(dev, PAGE_SIZE, ucb->ts_base, ucb->bus_addr);
++		ucb->ts_base = 0;
++		ucb->bus_addr = 0;
++	}
++
++	if (!ucb->ts_base) {
++		err = rpi_firmware_property(fw, RPI_FIRMWARE_FRAMEBUFFER_GET_GPIOVIRTBUF,
++					    &gpiovirtbuf, sizeof(gpiovirtbuf));
++
++		if (err) {
++			dev_err(dev, "Failed to get gpiovirtbuf\n");
++			goto out;
++		}
++
++		if (!gpiovirtbuf) {
++			dev_err(dev, "No virtgpio buffer\n");
++			err = -ENOENT;
++			goto out;
++		}
++
++		// mmap the physical memory
++		gpiovirtbuf &= ~0xc0000000;
++		ucb->ts_base = ioremap(gpiovirtbuf, 4096);
++		if (ucb->ts_base == NULL) {
++			dev_err(dev, "Failed to map physical address\n");
++			err = -ENOENT;
++			goto out;
++		}
++		ucb->bus_addr = 0;
++	}
++	ucb->gc.label = MODULE_NAME;
++	ucb->gc.owner = THIS_MODULE;
++	//ucb->gc.dev = dev;
++	ucb->gc.of_node = np;
++	ucb->gc.base = 100;
++	ucb->gc.ngpio = NUM_GPIO;
++
++	ucb->gc.direction_input = brcmvirt_gpio_dir_in;
++	ucb->gc.direction_output = brcmvirt_gpio_dir_out;
++	ucb->gc.get = brcmvirt_gpio_get;
++	ucb->gc.set = brcmvirt_gpio_set;
++	ucb->gc.can_sleep = true;
++
++	err = gpiochip_add(&ucb->gc);
++	if (err)
++		goto out;
++
++	platform_set_drvdata(pdev, ucb);
++
++	return 0;
++out:
++	if (ucb->bus_addr) {
++		dma_free_coherent(dev, PAGE_SIZE, ucb->ts_base, ucb->bus_addr);
++		ucb->bus_addr = 0;
++		ucb->ts_base = NULL;
++	} else if (ucb->ts_base) {
++		iounmap(ucb->ts_base);
++		ucb->ts_base = NULL;
++	}
++	return err;
++}
++
++static int brcmvirt_gpio_remove(struct platform_device *pdev)
++{
++	struct device *dev = &pdev->dev;
++	int err = 0;
++	struct brcmvirt_gpio *ucb = platform_get_drvdata(pdev);
++
++	gpiochip_remove(&ucb->gc);
++	if (ucb->bus_addr)
++		dma_free_coherent(dev, PAGE_SIZE, ucb->ts_base, ucb->bus_addr);
++	else if (ucb->ts_base)
++		iounmap(ucb->ts_base);
++	return err;
++}
++
++static const struct of_device_id __maybe_unused brcmvirt_gpio_ids[] = {
++	{ .compatible = "brcm,bcm2835-virtgpio" },
++	{ }
++};
++MODULE_DEVICE_TABLE(of, brcmvirt_gpio_ids);
++
++static struct platform_driver brcmvirt_gpio_driver = {
++	.driver	= {
++		.name		= MODULE_NAME,
++		.owner		= THIS_MODULE,
++		.of_match_table	= of_match_ptr(brcmvirt_gpio_ids),
++	},
++	.probe	= brcmvirt_gpio_probe,
++	.remove	= brcmvirt_gpio_remove,
++};
++module_platform_driver(brcmvirt_gpio_driver);
++
++MODULE_LICENSE("GPL");
++MODULE_AUTHOR("Dom Cobley <popcornmix@gmail.com>");
++MODULE_DESCRIPTION("brcmvirt GPIO driver");
++MODULE_ALIAS("platform:brcmvirt-gpio");