brcm63xx: probe gpio controllers through DT

Add a generic mmio gpio controller based driver and probe it
through device tree.

Use aliases for base calculation until we converted all users to
device tree or named gpios.

Convert bcm63xx_enet's ephy-reset gpio to use a named gpio.

While at it, remove the duplicate reset gpio defintion for livebox.

Signed-off-by: Jonas Gorski <jogo@openwrt.org>

SVN-Revision: 44565

1 files changed, 161 insertions, 0 deletions

diff --git a/target/linux/brcm63xx/patches-3.18/374-gpio-add-a-simple-GPIO-driver-for-bcm63xx.patch b/target/linux/brcm63xx/patches-3.18/374-gpio-add-a-simple-GPIO-driver-for-bcm63xx.patch
new file mode 100644
index 0000000..82d7abe
--- /dev/null
+++ b/target/linux/brcm63xx/patches-3.18/374-gpio-add-a-simple-GPIO-driver-for-bcm63xx.patch
@@ -0,0 +1,161 @@
+From dbe94a8daaa63ef81b7414f2a17bca8e36dd6daa Mon Sep 17 00:00:00 2001
+From: Jonas Gorski <jogo@openwrt.org>
+Date: Fri, 20 Feb 2015 19:55:32 +0100
+Subject: [PATCH 1/6] gpio: add a simple GPIO driver for bcm63xx
+
+
+Signed-off-by: Jonas Gorski <jogo@openwrt.org>
+---
+ drivers/gpio/Kconfig        |    8 +++
+ drivers/gpio/Makefile       |    1 +
+ drivers/gpio/gpio-bcm63xx.c |  117 +++++++++++++++++++++++++++++++++++++++++++
+ 3 files changed, 126 insertions(+)
+ create mode 100644 drivers/gpio/gpio-bcm63xx.c
+
+--- a/drivers/gpio/Kconfig
++++ b/drivers/gpio/Kconfig
+@@ -892,6 +892,14 @@ config GPIO_BCM_KONA
+ 	help
+ 	  Turn on GPIO support for Broadcom "Kona" chips.
+ 
++config GPIO_BCM63XX
++	bool "Broadcom BCM63XX GPIO"
++	depends on MIPS || COMPILE_TEST
++	select GPIO_GENERIC
++	help
++	  Turn on GPIO support for Broadcom BCM63XX xDSL chips.
++
++
+ comment "USB GPIO expanders:"
+ 
+ config GPIO_VIPERBOARD
+--- a/drivers/gpio/Makefile
++++ b/drivers/gpio/Makefile
+@@ -19,6 +19,7 @@ obj-$(CONFIG_GPIO_ADP5588)	+= gpio-adp55
+ obj-$(CONFIG_GPIO_AMD8111)	+= gpio-amd8111.o
+ obj-$(CONFIG_GPIO_ARIZONA)	+= gpio-arizona.o
+ obj-$(CONFIG_GPIO_BCM_KONA)	+= gpio-bcm-kona.o
++obj-$(CONFIG_GPIO_BCM63XX)	+= gpio-bcm63xx.o
+ obj-$(CONFIG_GPIO_BT8XX)	+= gpio-bt8xx.o
+ obj-$(CONFIG_GPIO_CLPS711X)	+= gpio-clps711x.o
+ obj-$(CONFIG_GPIO_CS5535)	+= gpio-cs5535.o
+--- /dev/null
++++ b/drivers/gpio/gpio-bcm63xx.c
+@@ -0,0 +1,117 @@
++/*
++ * Driver for BCM63XX memory-mapped GPIO controllers, based on
++ * Generic driver for memory-mapped GPIO controllers.
++ *
++ * Copyright 2008 MontaVista Software, Inc.
++ * Copyright 2008,2010 Anton Vorontsov <cbouatmailru@gmail.com>
++ * Copyright 2015 Jonas Gorski <jogo@openwrt.org>
++ *
++ * 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/init.h>
++#include <linux/err.h>
++#include <linux/bug.h>
++#include <linux/kernel.h>
++#include <linux/module.h>
++#include <linux/spinlock.h>
++#include <linux/compiler.h>
++#include <linux/types.h>
++#include <linux/errno.h>
++#include <linux/log2.h>
++#include <linux/ioport.h>
++#include <linux/io.h>
++#include <linux/gpio.h>
++#include <linux/slab.h>
++#include <linux/platform_device.h>
++#include <linux/mod_devicetable.h>
++#include <linux/basic_mmio_gpio.h>
++#include <linux/of.h>
++#include <linux/of_gpio.h>
++
++static int bcm63xx_gpio_probe(struct platform_device *pdev)
++{
++	struct device *dev = &pdev->dev;
++	struct resource *dat_r, *dirout_r;
++	void __iomem *dat;
++	void __iomem *dirout;
++	unsigned long sz;
++	int err;
++	struct bgpio_chip *bgc;
++	struct bgpio_pdata *pdata = dev_get_platdata(dev);
++
++	dat_r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
++	dirout_r = platform_get_resource(pdev, IORESOURCE_MEM, 1);
++	if (!dat_r || !dirout_r)
++		return -EINVAL;
++
++	if (resource_size(dat_r) != resource_size(dirout_r))
++		return -EINVAL;
++
++	sz = resource_size(dat_r);
++
++	dat = devm_ioremap_resource(dev, dat_r);
++	if (IS_ERR(dat))
++		return PTR_ERR(dat);
++
++	dirout = devm_ioremap_resource(dev, dirout_r);
++	if (IS_ERR(dirout))
++		return PTR_ERR(dirout);
++
++	bgc = devm_kzalloc(&pdev->dev, sizeof(*bgc), GFP_KERNEL);
++	if (!bgc)
++		return -ENOMEM;
++
++	err = bgpio_init(bgc, dev, sz, dat, NULL, NULL, dirout, NULL,
++			 BGPIOF_BIG_ENDIAN_BYTE_ORDER);
++	if (err)
++		return err;
++
++	platform_set_drvdata(pdev, bgc);
++
++	if (dev->of_node) {
++		u32 ngpios;
++
++		if (!of_property_read_u32(dev->of_node, "ngpios", &ngpios))
++			bgc->gc.ngpio = ngpios;
++
++	} else if (pdata) {
++		bgc->gc.base = pdata->base;
++		if (pdata->ngpio > 0)
++			bgc->gc.ngpio = pdata->ngpio;
++	}
++
++	return gpiochip_add(&bgc->gc);
++}
++
++static int bcm63xx_gpio_remove(struct platform_device *pdev)
++{
++	struct bgpio_chip *bgc = platform_get_drvdata(pdev);
++
++	return bgpio_remove(bgc);
++}
++
++#ifdef CONFIG_OF
++static struct of_device_id bcm63xx_gpio_of_match[] = {
++	{ .compatible = "brcm,bcm6345-gpio" },
++	{ },
++};
++#endif
++
++static struct platform_driver bcm63xx_gpio_driver = {
++	.probe = bcm63xx_gpio_probe,
++	.remove = bcm63xx_gpio_remove,
++	.driver = {
++		.name = "bcm63xx-gpio",
++		.of_match_table = of_match_ptr(bcm63xx_gpio_of_match),
++	},
++};
++
++module_platform_driver(bcm63xx_gpio_driver);
++
++MODULE_DESCRIPTION("Driver for BCM63XX memory-mapped GPIO controllers");
++MODULE_AUTHOR("Jonas Gorski <jogo@openwrt.org>");
++MODULE_LICENSE("GPL");