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, 304 insertions, 0 deletions

diff --git a/target/linux/brcm2708/patches-4.14/950-0091-bcm2835-gpio-exp-Driver-for-GPIO-expander-via-mailbo.patch b/target/linux/brcm2708/patches-4.14/950-0091-bcm2835-gpio-exp-Driver-for-GPIO-expander-via-mailbo.patch
new file mode 100644
index 0000000000..1a58fd261f
--- /dev/null
+++ b/target/linux/brcm2708/patches-4.14/950-0091-bcm2835-gpio-exp-Driver-for-GPIO-expander-via-mailbo.patch
@@ -0,0 +1,304 @@
+From 74e1aacb52fcaf5d07b5d765dca1287e4234f34d Mon Sep 17 00:00:00 2001
+From: Dave Stevenson <dave.stevenson@raspberrypi.org>
+Date: Mon, 20 Feb 2017 17:01:21 +0000
+Subject: [PATCH 091/454] bcm2835-gpio-exp: Driver for GPIO expander via
+ mailbox service
+
+Pi3 and Compute Module 3 have a GPIO expander that the
+VPU communicates with.
+There is a mailbox service that now allows control of this
+expander, so add a kernel driver that can make use of it.
+
+Pwr_led node added to device-tree for Pi3.
+
+Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.org>
+---
+ drivers/gpio/Kconfig        |   7 +
+ drivers/gpio/Makefile       |   1 +
+ drivers/gpio/gpio-bcm-exp.c | 254 ++++++++++++++++++++++++++++++++++++
+ 3 files changed, 262 insertions(+)
+ create mode 100644 drivers/gpio/gpio-bcm-exp.c
+
+--- a/drivers/gpio/Kconfig
++++ b/drivers/gpio/Kconfig
+@@ -128,6 +128,13 @@ config GPIO_AXP209
+ 	help
+ 	  Say yes to enable GPIO support for the AXP209 PMIC
+ 
++config GPIO_BCM_EXP
++	bool "Broadcom Exp GPIO"
++	depends on OF_GPIO && RASPBERRYPI_FIRMWARE && (ARCH_BCM2835 || COMPILE_TEST)
++	help
++	  Turn on GPIO support for Broadcom chips using the firmware mailbox
++	  to communicate with VideoCore on BCM283x chips.
++
+ config GPIO_BCM_KONA
+ 	bool "Broadcom Kona GPIO"
+ 	depends on OF_GPIO && (ARCH_BCM_MOBILE || COMPILE_TEST)
+--- a/drivers/gpio/Makefile
++++ b/drivers/gpio/Makefile
+@@ -33,6 +33,7 @@ obj-$(CONFIG_GPIO_ARIZONA)	+= gpio-arizo
+ obj-$(CONFIG_GPIO_ATH79)	+= gpio-ath79.o
+ obj-$(CONFIG_GPIO_ASPEED)	+= gpio-aspeed.o
+ obj-$(CONFIG_GPIO_AXP209)	+= gpio-axp209.o
++obj-$(CONFIG_GPIO_BCM_EXP)	+= gpio-bcm-exp.o
+ obj-$(CONFIG_GPIO_BCM_KONA)	+= gpio-bcm-kona.o
+ obj-$(CONFIG_GPIO_BD9571MWV)	+= gpio-bd9571mwv.o
+ obj-$(CONFIG_GPIO_BCM_VIRT)	+= gpio-bcm-virt.o
+--- /dev/null
++++ b/drivers/gpio/gpio-bcm-exp.c
+@@ -0,0 +1,254 @@
++/*
++ *  Broadcom expander GPIO driver
++ *
++ *  Uses the firmware mailbox service to communicate with the
++ *  GPIO expander on the VPU.
++ *
++ *  Copyright (C) 2017 Raspberry Pi Trading Ltd.
++ *
++ *  Author: Dave Stevenson <dave.stevenson@raspberrypi.org>
++ *  Based on gpio-bcm-virt.c by Dom Cobley <popcornmix@gmail.com>
++ *
++ * 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 "brcmexp-gpio"
++#define NUM_GPIO 8
++
++struct brcmexp_gpio {
++	struct gpio_chip gc;
++	struct device *dev;
++	struct rpi_firmware *fw;
++};
++
++struct gpio_set_config {
++	u32 gpio, direction, polarity, term_en, term_pull_up, state;
++};
++
++struct gpio_get_config {
++	u32 gpio, direction, polarity, term_en, term_pull_up;
++};
++
++struct gpio_get_set_state {
++	u32 gpio, state;
++};
++
++static int brcmexp_gpio_get_polarity(struct gpio_chip *gc, unsigned int off)
++{
++	struct brcmexp_gpio *gpio;
++	struct gpio_get_config get;
++	int ret;
++
++	gpio = container_of(gc, struct brcmexp_gpio, gc);
++
++	get.gpio = off + gpio->gc.base;	/* GPIO to update */
++
++	ret = rpi_firmware_property(gpio->fw, RPI_FIRMWARE_GET_GPIO_CONFIG,
++				    &get, sizeof(get));
++	if (ret) {
++		dev_err(gpio->dev,
++			"Failed to get GPIO %u config (%d)\n", off, ret);
++		return ret;
++	}
++	return get.polarity;
++}
++
++static int brcmexp_gpio_dir_in(struct gpio_chip *gc, unsigned int off)
++{
++	struct brcmexp_gpio *gpio;
++	struct gpio_set_config set_in;
++	int ret;
++
++	gpio = container_of(gc, struct brcmexp_gpio, gc);
++
++	set_in.gpio = off + gpio->gc.base;	/* GPIO to update */
++	set_in.direction = 0;		/* Input */
++	set_in.polarity = brcmexp_gpio_get_polarity(gc, off);
++					/* Retain existing setting */
++	set_in.term_en = 0;		/* termination disabled */
++	set_in.term_pull_up = 0;	/* n/a as termination disabled */
++	set_in.state = 0;		/* n/a as configured as an input */
++
++	ret = rpi_firmware_property(gpio->fw, RPI_FIRMWARE_SET_GPIO_CONFIG,
++				    &set_in, sizeof(set_in));
++	if (ret) {
++		dev_err(gpio->dev,
++			"Failed to set GPIO %u to input (%d)\n",
++			off, ret);
++		return ret;
++	}
++	return 0;
++}
++
++static int brcmexp_gpio_dir_out(struct gpio_chip *gc, unsigned int off, int val)
++{
++	struct brcmexp_gpio *gpio;
++	struct gpio_set_config set_out;
++	int ret;
++
++	gpio = container_of(gc, struct brcmexp_gpio, gc);
++
++	set_out.gpio = off + gpio->gc.base;	/* GPIO to update */
++	set_out.direction = 1;		/* Output */
++	set_out.polarity = brcmexp_gpio_get_polarity(gc, off);
++					/* Retain existing setting */
++	set_out.term_en = 0;		/* n/a as an output */
++	set_out.term_pull_up = 0;	/* n/a as termination disabled */
++	set_out.state = val;		/* Output state */
++
++	ret = rpi_firmware_property(gpio->fw, RPI_FIRMWARE_SET_GPIO_CONFIG,
++				    &set_out, sizeof(set_out));
++	if (ret) {
++		dev_err(gpio->dev,
++			"Failed to set GPIO %u to output (%d)\n", off, ret);
++		return ret;
++	}
++	return 0;
++}
++
++static int brcmexp_gpio_get_direction(struct gpio_chip *gc, unsigned int off)
++{
++	struct brcmexp_gpio *gpio;
++	struct gpio_get_config get;
++	int ret;
++
++	gpio = container_of(gc, struct brcmexp_gpio, gc);
++
++	get.gpio = off + gpio->gc.base;	/* GPIO to update */
++
++	ret = rpi_firmware_property(gpio->fw, RPI_FIRMWARE_GET_GPIO_CONFIG,
++				    &get, sizeof(get));
++	if (ret) {
++		dev_err(gpio->dev,
++			"Failed to get GPIO %u config (%d)\n", off, ret);
++		return ret;
++	}
++	return get.direction ? GPIOF_DIR_OUT : GPIOF_DIR_IN;
++}
++
++static int brcmexp_gpio_get(struct gpio_chip *gc, unsigned int off)
++{
++	struct brcmexp_gpio *gpio;
++	struct gpio_get_set_state get;
++	int ret;
++
++	gpio = container_of(gc, struct brcmexp_gpio, gc);
++
++	get.gpio = off + gpio->gc.base;	/* GPIO to update */
++	get.state = 0;		/* storage for returned value */
++
++	ret = rpi_firmware_property(gpio->fw, RPI_FIRMWARE_GET_GPIO_STATE,
++					 &get, sizeof(get));
++	if (ret) {
++		dev_err(gpio->dev,
++			"Failed to get GPIO %u state (%d)\n", off, ret);
++		return ret;
++	}
++	return !!get.state;
++}
++
++static void brcmexp_gpio_set(struct gpio_chip *gc, unsigned int off, int val)
++{
++	struct brcmexp_gpio *gpio;
++	struct gpio_get_set_state set;
++	int ret;
++
++	gpio = container_of(gc, struct brcmexp_gpio, gc);
++
++	set.gpio = off + gpio->gc.base;	/* GPIO to update */
++	set.state = val;	/* Output state */
++
++	ret = rpi_firmware_property(gpio->fw, RPI_FIRMWARE_SET_GPIO_STATE,
++					 &set, sizeof(set));
++	if (ret)
++		dev_err(gpio->dev,
++			"Failed to set GPIO %u state (%d)\n", off, ret);
++}
++
++static int brcmexp_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 brcmexp_gpio *ucb;
++
++	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)
++		return -EINVAL;
++
++	ucb->fw = fw;
++	ucb->dev = dev;
++	ucb->gc.label = MODULE_NAME;
++	ucb->gc.owner = THIS_MODULE;
++	ucb->gc.of_node = np;
++	ucb->gc.base = 128;
++	ucb->gc.ngpio = NUM_GPIO;
++
++	ucb->gc.direction_input = brcmexp_gpio_dir_in;
++	ucb->gc.direction_output = brcmexp_gpio_dir_out;
++	ucb->gc.get_direction = brcmexp_gpio_get_direction;
++	ucb->gc.get = brcmexp_gpio_get;
++	ucb->gc.set = brcmexp_gpio_set;
++	ucb->gc.can_sleep = true;
++
++	err = gpiochip_add(&ucb->gc);
++	if (err)
++		return err;
++
++	platform_set_drvdata(pdev, ucb);
++
++	return 0;
++}
++
++static int brcmexp_gpio_remove(struct platform_device *pdev)
++{
++	struct brcmexp_gpio *ucb = platform_get_drvdata(pdev);
++
++	gpiochip_remove(&ucb->gc);
++
++	return 0;
++}
++
++static const struct of_device_id __maybe_unused brcmexp_gpio_ids[] = {
++	{ .compatible = "brcm,bcm2835-expgpio" },
++	{ }
++};
++MODULE_DEVICE_TABLE(of, brcmexp_gpio_ids);
++
++static struct platform_driver brcmexp_gpio_driver = {
++	.driver	= {
++		.name		= MODULE_NAME,
++		.owner		= THIS_MODULE,
++		.of_match_table	= of_match_ptr(brcmexp_gpio_ids),
++	},
++	.probe	= brcmexp_gpio_probe,
++	.remove	= brcmexp_gpio_remove,
++};
++module_platform_driver(brcmexp_gpio_driver);
++
++MODULE_LICENSE("GPL");
++MODULE_AUTHOR("Dave Stevenson <dave.stevenson@raspberrypi.org>");
++MODULE_DESCRIPTION("brcm-exp GPIO driver");
++MODULE_ALIAS("platform:brcmexp-gpio");