brcm2708: update linux 4.4 patches to latest version

As usual these patches were extracted from the raspberry pi repo:
https://github.com/raspberrypi/linux/tree/rpi-4.4.y

Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>

1 files changed, 244 insertions, 0 deletions

diff --git a/target/linux/brcm2708/patches-4.4/0159-bcm2835-virtgpio-Virtual-GPIO-driver.patch b/target/linux/brcm2708/patches-4.4/0159-bcm2835-virtgpio-Virtual-GPIO-driver.patch
new file mode 100644
index 0000000000..a8b990fc1e
--- /dev/null
+++ b/target/linux/brcm2708/patches-4.4/0159-bcm2835-virtgpio-Virtual-GPIO-driver.patch
@@ -0,0 +1,244 @@
+From 46aa468ca952060fd0f45e7da5b79f656b9d1dc0 Mon Sep 17 00:00:00 2001
+From: popcornmix <popcornmix@gmail.com>
+Date: Tue, 23 Feb 2016 19:56:04 +0000
+Subject: [PATCH 159/304] bcm2835-virtgpio: Virtual GPIO driver
+
+Add a virtual GPIO driver that uses the firmware mailbox interface to
+request that the VPU toggles LEDs.
+---
+ arch/arm/configs/bcm2709_defconfig         |   1 +
+ drivers/gpio/Kconfig                       |   6 +
+ drivers/gpio/Makefile                      |   1 +
+ drivers/gpio/gpio-bcm-virt.c               | 180 +++++++++++++++++++++++++++++
+ include/soc/bcm2835/raspberrypi-firmware.h |   1 +
+ 5 files changed, 189 insertions(+)
+ create mode 100644 drivers/gpio/gpio-bcm-virt.c
+
+--- a/arch/arm/configs/bcm2709_defconfig
++++ b/arch/arm/configs/bcm2709_defconfig
+@@ -607,6 +607,7 @@ CONFIG_PPS=m
+ CONFIG_PPS_CLIENT_LDISC=m
+ CONFIG_PPS_CLIENT_GPIO=m
+ CONFIG_GPIO_SYSFS=y
++CONFIG_GPIO_BCM_VIRT=y
+ CONFIG_GPIO_ARIZONA=m
+ CONFIG_GPIO_STMPE=y
+ CONFIG_W1=m
+--- a/drivers/gpio/Kconfig
++++ b/drivers/gpio/Kconfig
+@@ -132,6 +132,12 @@ 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 || ARCH_BCM2708 || ARCH_BCM2709 || COMPILE_TEST)
++	help
++	  Turn on virtual GPIO support for Broadcom BCM283X chips.
++
+ config GPIO_BRCMSTB
+ 	tristate "BRCMSTB GPIO support"
+ 	default y if ARCH_BRCMSTB
+--- a/drivers/gpio/Makefile
++++ b/drivers/gpio/Makefile
+@@ -24,6 +24,7 @@ obj-$(CONFIG_GPIO_AMDPT)	+= gpio-amdpt.o
+ obj-$(CONFIG_GPIO_ARIZONA)	+= gpio-arizona.o
+ obj-$(CONFIG_ATH79)		+= gpio-ath79.o
+ obj-$(CONFIG_GPIO_BCM_KONA)	+= gpio-bcm-kona.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 +1,180 @@
++/*
++ *  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/basic_mmio_gpio.h>
++#include <linux/platform_device.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];
++};
++
++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)
++{
++	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;
++	int err = 0;
++
++	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;
++
++	err = rpi_firmware_property(fw, RPI_FIRMWARE_FRAMEBUFFER_GET_GPIOVIRTBUF,
++				    &gpiovirtbuf, sizeof(gpiovirtbuf));
++
++	if (err) {
++		dev_err(dev, "Failed to get gpiovirtbuf\n");
++		goto err;
++	}
++
++	if (!gpiovirtbuf) {
++		dev_err(dev, "No virtgpio buffer\n");
++		err = -ENOENT;
++		goto err;
++	}
++
++	ucb = devm_kzalloc(dev, sizeof *ucb, GFP_KERNEL);
++	if (!ucb) {
++		err = -EINVAL;
++		goto err;
++	}
++
++	// 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 err;
++	}
++
++	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 err;
++
++	platform_set_drvdata(pdev, ucb);
++
++err:
++	return err;
++
++}
++
++static int brcmvirt_gpio_remove(struct platform_device *pdev)
++{
++	int err = 0;
++	struct brcmvirt_gpio *ucb = platform_get_drvdata(pdev);
++
++	gpiochip_remove(&ucb->gc);
++	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");
+--- a/include/soc/bcm2835/raspberrypi-firmware.h
++++ b/include/soc/bcm2835/raspberrypi-firmware.h
+@@ -93,6 +93,7 @@ enum rpi_firmware_property_tag {
+ 	RPI_FIRMWARE_FRAMEBUFFER_GET_OVERSCAN =               0x0004000a,
+ 	RPI_FIRMWARE_FRAMEBUFFER_GET_PALETTE =                0x0004000b,
+ 	RPI_FIRMWARE_FRAMEBUFFER_GET_TOUCHBUF =               0x0004000f,
++	RPI_FIRMWARE_FRAMEBUFFER_GET_GPIOVIRTBUF =            0x00040010,
+ 	RPI_FIRMWARE_FRAMEBUFFER_RELEASE =                    0x00048001,
+ 	RPI_FIRMWARE_FRAMEBUFFER_TEST_PHYSICAL_WIDTH_HEIGHT = 0x00044003,
+ 	RPI_FIRMWARE_FRAMEBUFFER_TEST_VIRTUAL_WIDTH_HEIGHT =  0x00044004,