brcm2708: rename all patches from raspberrypi git tree to use 950 prefix

Right now all brcm2708 patches are extracted from the non-mainline
raspberrypi/linux git tree. Many of them are hacks and/or are unneeded
in LEDE. Raspberry Pi is getting better and better mainline support so
it would be nice to finally start maintaining patches in a cleaner way:
1) Backport patches accepted in upstream tree
2) Start using upstream drivers
3) Pick only these patches that are needed for more complete support

Handling above tasks requires grouping patches - ideally using the same
prefixes as generic ones. It means we should rename existing patches to
use some high prefix. This will allow e.g. use 0xx for backported code.

Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
Acked-by: Florian Fainelli <f.fainelli@gmail.com>
Acked-by: Stijn Tintel <stijn@linux-ipv6.be>

1 files changed, 405 insertions, 0 deletions

diff --git a/target/linux/brcm2708/patches-4.9/950-0198-bcm2835-gpio-exp-Driver-for-GPIO-expander-via-mailbo.patch b/target/linux/brcm2708/patches-4.9/950-0198-bcm2835-gpio-exp-Driver-for-GPIO-expander-via-mailbo.patch
new file mode 100644
index 0000000..3d09d1d
--- /dev/null
+++ b/target/linux/brcm2708/patches-4.9/950-0198-bcm2835-gpio-exp-Driver-for-GPIO-expander-via-mailbo.patch
@@ -0,0 +1,405 @@
+From 2f8f62fbd42a55825da437faba4b6164f2e0bee9 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] 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>
+---
+ arch/arm/boot/dts/bcm2710-rpi-3-b.dts      |  22 +++
+ arch/arm/boot/dts/bcm2710-rpi-cm3.dts      |  10 +-
+ arch/arm/configs/bcm2709_defconfig         |   1 +
+ drivers/gpio/Kconfig                       |   7 +
+ drivers/gpio/Makefile                      |   1 +
+ drivers/gpio/gpio-bcm-exp.c                | 256 +++++++++++++++++++++++++++++
+ include/soc/bcm2835/raspberrypi-firmware.h |   4 +
+ 7 files changed, 300 insertions(+), 1 deletion(-)
+ create mode 100644 drivers/gpio/gpio-bcm-exp.c
+
+--- a/arch/arm/boot/dts/bcm2710-rpi-3-b.dts
++++ b/arch/arm/boot/dts/bcm2710-rpi-3-b.dts
+@@ -96,6 +96,14 @@
+ 		firmware = <&firmware>;
+ 		status = "okay";
+ 	};
++
++	expgpio: expgpio {
++		compatible = "brcm,bcm2835-expgpio";
++		gpio-controller;
++		#gpio-cells = <2>;
++		firmware = <&firmware>;
++		status = "okay";
++	};
+ };
+ 
+ &fb {
+@@ -163,6 +171,16 @@
+ 		linux,default-trigger = "mmc0";
+ 		gpios = <&virtgpio 0 0>;
+ 	};
++
++	pwr_led: pwr {
++		label = "led1";
++		linux,default-trigger = "input";
++		gpios = <&expgpio 7 GPIO_ACTIVE_LOW>;
++	};
++};
++
++&hdmi {
++	hpd-gpios = <&expgpio 4 GPIO_ACTIVE_LOW>;
+ };
+ 
+ &audio {
+@@ -193,6 +211,10 @@
+ 		act_led_activelow = <&act_led>,"gpios:8";
+ 		act_led_trigger = <&act_led>,"linux,default-trigger";
+ 
++		pwr_led_gpio = <&pwr_led>,"gpios:4";
++		pwr_led_activelow = <&pwr_led>,"gpios:8";
++		pwr_led_trigger = <&pwr_led>,"linux,default-trigger";
++
+ 		audio = <&audio>,"status";
+ 		watchdog = <&watchdog>,"status";
+ 		random = <&random>,"status";
+--- a/arch/arm/boot/dts/bcm2710-rpi-cm3.dts
++++ b/arch/arm/boot/dts/bcm2710-rpi-cm3.dts
+@@ -65,6 +65,14 @@
+ 		firmware = <&firmware>;
+ 		status = "okay";
+ 	};
++
++	expgpio: expgpio {
++		compatible = "brcm,bcm2835-expgpio";
++		gpio-controller;
++		#gpio-cells = <2>;
++		firmware = <&firmware>;
++		status = "okay";
++	};
+ };
+ 
+ &fb {
+@@ -123,7 +131,7 @@
+ };
+ 
+ &hdmi {
+-	hpd-gpios = <&gpio 46 GPIO_ACTIVE_LOW>;
++	hpd-gpios = <&expgpio 0 GPIO_ACTIVE_LOW>;
+ };
+ 
+ &audio {
+--- a/arch/arm/configs/bcm2709_defconfig
++++ b/arch/arm/configs/bcm2709_defconfig
+@@ -625,6 +625,7 @@ CONFIG_PPS=m
+ CONFIG_PPS_CLIENT_LDISC=m
+ CONFIG_PPS_CLIENT_GPIO=m
+ CONFIG_GPIO_SYSFS=y
++CONFIG_GPIO_BCM_EXP=y
+ CONFIG_GPIO_BCM_VIRT=y
+ CONFIG_GPIO_ARIZONA=m
+ CONFIG_GPIO_STMPE=y
+--- 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
+@@ -30,6 +30,7 @@ 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-$(CONFIG_GPIO_BCM_VIRT)	+= gpio-bcm-virt.o
+ obj-$(CONFIG_GPIO_BRCMSTB)	+= gpio-brcmstb.o
+--- /dev/null
++++ b/drivers/gpio/gpio-bcm-exp.c
+@@ -0,0 +1,256 @@
++/*
++ *  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);
++
++	off += gpio->gc.base;
++
++	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");
+--- a/include/soc/bcm2835/raspberrypi-firmware.h
++++ b/include/soc/bcm2835/raspberrypi-firmware.h
+@@ -83,7 +83,11 @@ enum rpi_firmware_property_tag {
+ 	RPI_FIRMWARE_SET_TURBO =                              0x00038009,
+ 	RPI_FIRMWARE_SET_CUSTOMER_OTP =                       0x00038021,
+ 	RPI_FIRMWARE_SET_DOMAIN_STATE =                       0x00038030,
++	RPI_FIRMWARE_GET_GPIO_STATE =                         0x00030041,
++	RPI_FIRMWARE_SET_GPIO_STATE =                         0x00038041,
+ 	RPI_FIRMWARE_SET_SDHOST_CLOCK =                       0x00038042,
++	RPI_FIRMWARE_GET_GPIO_CONFIG =                        0x00030043,
++	RPI_FIRMWARE_SET_GPIO_CONFIG =                        0x00038043,
+ 
+ 	/* Dispmanx TAGS */
+ 	RPI_FIRMWARE_FRAMEBUFFER_ALLOCATE =                   0x00040001,