diff options
Diffstat (limited to 'target/linux/brcm2708/patches-4.1/0002-Add-bcm2708_gpio-driver.patch')
| -rw-r--r-- | target/linux/brcm2708/patches-4.1/0002-Add-bcm2708_gpio-driver.patch | 615 |
1 files changed, 615 insertions, 0 deletions
diff --git a/target/linux/brcm2708/patches-4.1/0002-Add-bcm2708_gpio-driver.patch b/target/linux/brcm2708/patches-4.1/0002-Add-bcm2708_gpio-driver.patch new file mode 100644 index 0000000..e79b45a --- /dev/null +++ b/target/linux/brcm2708/patches-4.1/0002-Add-bcm2708_gpio-driver.patch @@ -0,0 +1,615 @@ +From 1b06d065cc1209ff7524486eae5dd9bf00a2db0e Mon Sep 17 00:00:00 2001 +From: popcornmix <popcornmix@gmail.com> +Date: Wed, 8 Oct 2014 18:50:05 +0100 +Subject: [PATCH 002/203] Add bcm2708_gpio driver + +Signed-off-by: popcornmix <popcornmix@gmail.com> + +bcm2708: Add extension to configure internal pulls + +The bcm2708 gpio controller supports internal pulls to be used as pull-up, +pull-down or being entirely disabled. As it can be useful for a driver to +change the pull configuration from it's default pull-down state, add an +extension which allows configuring the pull per gpio. + +Signed-off-by: Julian Scheel <julian@jusst.de> + +bcm2708-gpio: Revert the use of pinctrl_request_gpio + +In non-DT systems, pinctrl_request_gpio always fails causing +"requests probe deferral" messages. In DT systems, it isn't useful +because the reference counting is independent of the normal pinctrl +pin reservations. + +gpio: Only clear the currently occurring interrupt. Avoids losing interrupts + +See: linux #760 + +bcm2708_gpio: Avoid calling irq_unmask for all interrupts + +When setting up the interrupts, specify that the handle_simple_irq +handler should be used. This leaves interrupt acknowledgement to +the caller, and prevents irq_unmask from being called for all +interrupts. + +Issue: linux #760 +--- + arch/arm/mach-bcm2708/Kconfig | 8 + + arch/arm/mach-bcm2708/Makefile | 1 + + arch/arm/mach-bcm2708/bcm2708.c | 25 ++ + arch/arm/mach-bcm2708/bcm2708_gpio.c | 426 ++++++++++++++++++++++++++++++ + arch/arm/mach-bcm2708/include/mach/gpio.h | 17 ++ + arch/arm/mach-bcm2709/bcm2709.c | 25 ++ + include/linux/platform_data/bcm2708.h | 23 ++ + 7 files changed, 525 insertions(+) + create mode 100644 arch/arm/mach-bcm2708/bcm2708_gpio.c + create mode 100644 arch/arm/mach-bcm2708/include/mach/gpio.h + create mode 100644 include/linux/platform_data/bcm2708.h + +--- a/arch/arm/mach-bcm2708/Kconfig ++++ b/arch/arm/mach-bcm2708/Kconfig +@@ -20,6 +20,14 @@ config BCM2708_DT + help + Enable Device Tree support for BCM2708 + ++config BCM2708_GPIO ++ bool "BCM2708 gpio support" ++ depends on MACH_BCM2708 ++ select ARCH_REQUIRE_GPIOLIB ++ default y ++ help ++ Include support for the Broadcom(R) BCM2708 gpio. ++ + config BCM2708_NOL2CACHE + bool "Videocore L2 cache disable" + depends on MACH_BCM2708 +--- a/arch/arm/mach-bcm2708/Makefile ++++ b/arch/arm/mach-bcm2708/Makefile +@@ -3,3 +3,4 @@ + # + + obj-$(CONFIG_MACH_BCM2708) += bcm2708.o armctrl.o ++obj-$(CONFIG_BCM2708_GPIO) += bcm2708_gpio.o +--- a/arch/arm/mach-bcm2708/bcm2708.c ++++ b/arch/arm/mach-bcm2708/bcm2708.c +@@ -298,6 +298,31 @@ static struct platform_device bcm2708_vc + }, + }; + ++#ifdef CONFIG_BCM2708_GPIO ++#define BCM_GPIO_DRIVER_NAME "bcm2708_gpio" ++ ++static struct resource bcm2708_gpio_resources[] = { ++ [0] = { /* general purpose I/O */ ++ .start = GPIO_BASE, ++ .end = GPIO_BASE + SZ_4K - 1, ++ .flags = IORESOURCE_MEM, ++ }, ++}; ++ ++static u64 gpio_dmamask = DMA_BIT_MASK(DMA_MASK_BITS_COMMON); ++ ++static struct platform_device bcm2708_gpio_device = { ++ .name = BCM_GPIO_DRIVER_NAME, ++ .id = -1, /* only one VideoCore I/O area */ ++ .resource = bcm2708_gpio_resources, ++ .num_resources = ARRAY_SIZE(bcm2708_gpio_resources), ++ .dev = { ++ .dma_mask = &gpio_dmamask, ++ .coherent_dma_mask = DMA_BIT_MASK(DMA_MASK_BITS_COMMON), ++ }, ++}; ++#endif ++ + int __init bcm_register_device(struct platform_device *pdev) + { + int ret; +--- /dev/null ++++ b/arch/arm/mach-bcm2708/bcm2708_gpio.c +@@ -0,0 +1,426 @@ ++/* ++ * linux/arch/arm/mach-bcm2708/bcm2708_gpio.c ++ * ++ * Copyright (C) 2010 Broadcom ++ * ++ * This program is free software; you can redistribute it and/or modify ++ * it under the terms of the GNU General Public License version 2 as ++ * published by the Free Software Foundation. ++ * ++ */ ++ ++#include <linux/spinlock.h> ++#include <linux/module.h> ++#include <linux/delay.h> ++#include <linux/list.h> ++#include <linux/io.h> ++#include <linux/irq.h> ++#include <linux/interrupt.h> ++#include <linux/slab.h> ++#include <mach/gpio.h> ++#include <linux/gpio.h> ++#include <linux/platform_device.h> ++#include <mach/platform.h> ++#include <linux/pinctrl/consumer.h> ++ ++#include <linux/platform_data/bcm2708.h> ++ ++#define BCM_GPIO_DRIVER_NAME "bcm2708_gpio" ++#define DRIVER_NAME BCM_GPIO_DRIVER_NAME ++#define BCM_GPIO_USE_IRQ 1 ++ ++#define GPIOFSEL(x) (0x00+(x)*4) ++#define GPIOSET(x) (0x1c+(x)*4) ++#define GPIOCLR(x) (0x28+(x)*4) ++#define GPIOLEV(x) (0x34+(x)*4) ++#define GPIOEDS(x) (0x40+(x)*4) ++#define GPIOREN(x) (0x4c+(x)*4) ++#define GPIOFEN(x) (0x58+(x)*4) ++#define GPIOHEN(x) (0x64+(x)*4) ++#define GPIOLEN(x) (0x70+(x)*4) ++#define GPIOAREN(x) (0x7c+(x)*4) ++#define GPIOAFEN(x) (0x88+(x)*4) ++#define GPIOUD(x) (0x94+(x)*4) ++#define GPIOUDCLK(x) (0x98+(x)*4) ++ ++#define GPIO_BANKS 2 ++ ++enum { GPIO_FSEL_INPUT, GPIO_FSEL_OUTPUT, ++ GPIO_FSEL_ALT5, GPIO_FSEL_ALT_4, ++ GPIO_FSEL_ALT0, GPIO_FSEL_ALT1, ++ GPIO_FSEL_ALT2, GPIO_FSEL_ALT3, ++}; ++ ++ /* Each of the two spinlocks protects a different set of hardware ++ * regiters and data structurs. This decouples the code of the IRQ from ++ * the GPIO code. This also makes the case of a GPIO routine call from ++ * the IRQ code simpler. ++ */ ++static DEFINE_SPINLOCK(lock); /* GPIO registers */ ++ ++struct bcm2708_gpio { ++ struct list_head list; ++ void __iomem *base; ++ struct gpio_chip gc; ++ unsigned long rising[(BCM2708_NR_GPIOS + 31) / 32]; ++ unsigned long falling[(BCM2708_NR_GPIOS + 31) / 32]; ++ unsigned long high[(BCM2708_NR_GPIOS + 31) / 32]; ++ unsigned long low[(BCM2708_NR_GPIOS + 31) / 32]; ++}; ++ ++static int bcm2708_set_function(struct gpio_chip *gc, unsigned offset, ++ int function) ++{ ++ struct bcm2708_gpio *gpio = container_of(gc, struct bcm2708_gpio, gc); ++ unsigned long flags; ++ unsigned gpiodir; ++ unsigned gpio_bank = offset / 10; ++ unsigned gpio_field_offset = (offset - 10 * gpio_bank) * 3; ++ ++//printk(KERN_ERR DRIVER_NAME ": bcm2708_gpio_set_function %p (%d,%d)\n", gc, offset, function); ++ if (offset >= BCM2708_NR_GPIOS) ++ return -EINVAL; ++ ++ spin_lock_irqsave(&lock, flags); ++ ++ gpiodir = readl(gpio->base + GPIOFSEL(gpio_bank)); ++ gpiodir &= ~(7 << gpio_field_offset); ++ gpiodir |= function << gpio_field_offset; ++ writel(gpiodir, gpio->base + GPIOFSEL(gpio_bank)); ++ spin_unlock_irqrestore(&lock, flags); ++ gpiodir = readl(gpio->base + GPIOFSEL(gpio_bank)); ++ ++ return 0; ++} ++ ++static int bcm2708_gpio_dir_in(struct gpio_chip *gc, unsigned offset) ++{ ++ return bcm2708_set_function(gc, offset, GPIO_FSEL_INPUT); ++} ++ ++static void bcm2708_gpio_set(struct gpio_chip *gc, unsigned offset, int value); ++static int bcm2708_gpio_dir_out(struct gpio_chip *gc, unsigned offset, ++ int value) ++{ ++ int ret; ++ ret = bcm2708_set_function(gc, offset, GPIO_FSEL_OUTPUT); ++ if (ret >= 0) ++ bcm2708_gpio_set(gc, offset, value); ++ return ret; ++} ++ ++static int bcm2708_gpio_get(struct gpio_chip *gc, unsigned offset) ++{ ++ struct bcm2708_gpio *gpio = container_of(gc, struct bcm2708_gpio, gc); ++ unsigned gpio_bank = offset / 32; ++ unsigned gpio_field_offset = (offset - 32 * gpio_bank); ++ unsigned lev; ++ ++ if (offset >= BCM2708_NR_GPIOS) ++ return 0; ++ lev = readl(gpio->base + GPIOLEV(gpio_bank)); ++//printk(KERN_ERR DRIVER_NAME ": bcm2708_gpio_get %p (%d)=%d\n", gc, offset, 0x1 & (lev>>gpio_field_offset)); ++ return 0x1 & (lev >> gpio_field_offset); ++} ++ ++static void bcm2708_gpio_set(struct gpio_chip *gc, unsigned offset, int value) ++{ ++ struct bcm2708_gpio *gpio = container_of(gc, struct bcm2708_gpio, gc); ++ unsigned gpio_bank = offset / 32; ++ unsigned gpio_field_offset = (offset - 32 * gpio_bank); ++//printk(KERN_ERR DRIVER_NAME ": bcm2708_gpio_set %p (%d=%d)\n", gc, offset, value); ++ if (offset >= BCM2708_NR_GPIOS) ++ return; ++ if (value) ++ writel(1 << gpio_field_offset, gpio->base + GPIOSET(gpio_bank)); ++ else ++ writel(1 << gpio_field_offset, gpio->base + GPIOCLR(gpio_bank)); ++} ++ ++/********************** ++ * extension to configure pullups ++ */ ++int bcm2708_gpio_setpull(struct gpio_chip *gc, unsigned offset, ++ bcm2708_gpio_pull_t value) ++{ ++ struct bcm2708_gpio *gpio = container_of(gc, struct bcm2708_gpio, gc); ++ unsigned gpio_bank = offset / 32; ++ unsigned gpio_field_offset = (offset - 32 * gpio_bank); ++ ++ if (offset >= BCM2708_NR_GPIOS) ++ return -EINVAL; ++ ++ switch (value) { ++ case BCM2708_PULL_UP: ++ writel(2, gpio->base + GPIOUD(0)); ++ break; ++ case BCM2708_PULL_DOWN: ++ writel(1, gpio->base + GPIOUD(0)); ++ break; ++ case BCM2708_PULL_OFF: ++ writel(0, gpio->base + GPIOUD(0)); ++ break; ++ } ++ ++ udelay(5); ++ writel(1 << gpio_field_offset, gpio->base + GPIOUDCLK(gpio_bank)); ++ udelay(5); ++ writel(0, gpio->base + GPIOUD(0)); ++ writel(0 << gpio_field_offset, gpio->base + GPIOUDCLK(gpio_bank)); ++ ++ return 0; ++} ++EXPORT_SYMBOL(bcm2708_gpio_setpull); ++ ++/************************************************************************************************************************* ++ * bcm2708 GPIO IRQ ++ */ ++ ++#if BCM_GPIO_USE_IRQ ++ ++static int bcm2708_gpio_to_irq(struct gpio_chip *chip, unsigned gpio) ++{ ++ return gpio_to_irq(gpio); ++} ++ ++static int bcm2708_gpio_irq_set_type(struct irq_data *d, unsigned type) ++{ ++ unsigned irq = d->irq; ++ struct bcm2708_gpio *gpio = irq_get_chip_data(irq); ++ unsigned gn = irq_to_gpio(irq); ++ unsigned gb = gn / 32; ++ unsigned go = gn % 32; ++ ++ gpio->rising[gb] &= ~(1 << go); ++ gpio->falling[gb] &= ~(1 << go); ++ gpio->high[gb] &= ~(1 << go); ++ gpio->low[gb] &= ~(1 << go); ++ ++ if (type & ~(IRQ_TYPE_EDGE_FALLING | IRQ_TYPE_EDGE_RISING | IRQ_TYPE_LEVEL_LOW | IRQ_TYPE_LEVEL_HIGH)) ++ return -EINVAL; ++ ++ if (type & IRQ_TYPE_EDGE_RISING) ++ gpio->rising[gb] |= (1 << go); ++ if (type & IRQ_TYPE_EDGE_FALLING) ++ gpio->falling[gb] |= (1 << go); ++ if (type & IRQ_TYPE_LEVEL_HIGH) ++ gpio->high[gb] |= (1 << go); ++ if (type & IRQ_TYPE_LEVEL_LOW) ++ gpio->low[gb] |= (1 << go); ++ return 0; ++} ++ ++static void bcm2708_gpio_irq_mask(struct irq_data *d) ++{ ++ unsigned irq = d->irq; ++ struct bcm2708_gpio *gpio = irq_get_chip_data(irq); ++ unsigned gn = irq_to_gpio(irq); ++ unsigned gb = gn / 32; ++ unsigned long rising = readl(gpio->base + GPIOREN(gb)); ++ unsigned long falling = readl(gpio->base + GPIOFEN(gb)); ++ unsigned long high = readl(gpio->base + GPIOHEN(gb)); ++ unsigned long low = readl(gpio->base + GPIOLEN(gb)); ++ ++ gn = gn % 32; ++ ++ writel(rising & ~(1 << gn), gpio->base + GPIOREN(gb)); ++ writel(falling & ~(1 << gn), gpio->base + GPIOFEN(gb)); ++ writel(high & ~(1 << gn), gpio->base + GPIOHEN(gb)); ++ writel(low & ~(1 << gn), gpio->base + GPIOLEN(gb)); ++} ++ ++static void bcm2708_gpio_irq_unmask(struct irq_data *d) ++{ ++ unsigned irq = d->irq; ++ struct bcm2708_gpio *gpio = irq_get_chip_data(irq); ++ unsigned gn = irq_to_gpio(irq); ++ unsigned gb = gn / 32; ++ unsigned go = gn % 32; ++ unsigned long rising = readl(gpio->base + GPIOREN(gb)); ++ unsigned long falling = readl(gpio->base + GPIOFEN(gb)); ++ unsigned long high = readl(gpio->base + GPIOHEN(gb)); ++ unsigned long low = readl(gpio->base + GPIOLEN(gb)); ++ ++ if (gpio->rising[gb] & (1 << go)) { ++ writel(rising | (1 << go), gpio->base + GPIOREN(gb)); ++ } else { ++ writel(rising & ~(1 << go), gpio->base + GPIOREN(gb)); ++ } ++ ++ if (gpio->falling[gb] & (1 << go)) { ++ writel(falling | (1 << go), gpio->base + GPIOFEN(gb)); ++ } else { ++ writel(falling & ~(1 << go), gpio->base + GPIOFEN(gb)); ++ } ++ ++ if (gpio->high[gb] & (1 << go)) { ++ writel(high | (1 << go), gpio->base + GPIOHEN(gb)); ++ } else { ++ writel(high & ~(1 << go), gpio->base + GPIOHEN(gb)); ++ } ++ ++ if (gpio->low[gb] & (1 << go)) { ++ writel(low | (1 << go), gpio->base + GPIOLEN(gb)); ++ } else { ++ writel(low & ~(1 << go), gpio->base + GPIOLEN(gb)); ++ } ++} ++ ++static struct irq_chip bcm2708_irqchip = { ++ .name = "GPIO", ++ .irq_enable = bcm2708_gpio_irq_unmask, ++ .irq_disable = bcm2708_gpio_irq_mask, ++ .irq_unmask = bcm2708_gpio_irq_unmask, ++ .irq_mask = bcm2708_gpio_irq_mask, ++ .irq_set_type = bcm2708_gpio_irq_set_type, ++}; ++ ++static irqreturn_t bcm2708_gpio_interrupt(int irq, void *dev_id) ++{ ++ unsigned long edsr; ++ unsigned bank; ++ int i; ++ unsigned gpio; ++ unsigned level_bits; ++ struct bcm2708_gpio *gpio_data = dev_id; ++ ++ for (bank = 0; bank < GPIO_BANKS; bank++) { ++ edsr = readl(__io_address(GPIO_BASE) + GPIOEDS(bank)); ++ level_bits = gpio_data->high[bank] | gpio_data->low[bank]; ++ ++ for_each_set_bit(i, &edsr, 32) { ++ gpio = i + bank * 32; ++ /* ack edge triggered IRQs immediately */ ++ if (!(level_bits & (1<<i))) ++ writel(1<<i, ++ __io_address(GPIO_BASE) + GPIOEDS(bank)); ++ generic_handle_irq(gpio_to_irq(gpio)); ++ /* ack level triggered IRQ after handling them */ ++ if (level_bits & (1<<i)) ++ writel(1<<i, ++ __io_address(GPIO_BASE) + GPIOEDS(bank)); ++ } ++ } ++ return IRQ_HANDLED; ++} ++ ++static struct irqaction bcm2708_gpio_irq = { ++ .name = "BCM2708 GPIO catchall handler", ++ .flags = IRQF_TIMER | IRQF_IRQPOLL, ++ .handler = bcm2708_gpio_interrupt, ++}; ++ ++static void bcm2708_gpio_irq_init(struct bcm2708_gpio *ucb) ++{ ++ unsigned irq; ++ ++ ucb->gc.to_irq = bcm2708_gpio_to_irq; ++ ++ for (irq = GPIO_IRQ_START; irq < (GPIO_IRQ_START + GPIO_IRQS); irq++) { ++ irq_set_chip_data(irq, ucb); ++ irq_set_chip_and_handler(irq, &bcm2708_irqchip, ++ handle_simple_irq); ++ set_irq_flags(irq, IRQF_VALID); ++ } ++ ++ bcm2708_gpio_irq.dev_id = ucb; ++ setup_irq(IRQ_GPIO3, &bcm2708_gpio_irq); ++} ++ ++#else ++ ++static void bcm2708_gpio_irq_init(struct bcm2708_gpio *ucb) ++{ ++} ++ ++#endif /* #if BCM_GPIO_USE_IRQ ***************************************************************************************************************** */ ++ ++static int bcm2708_gpio_probe(struct platform_device *dev) ++{ ++ struct bcm2708_gpio *ucb; ++ struct resource *res; ++ int bank; ++ int err = 0; ++ ++ printk(KERN_INFO DRIVER_NAME ": bcm2708_gpio_probe %p\n", dev); ++ ++ ucb = kzalloc(sizeof(*ucb), GFP_KERNEL); ++ if (NULL == ucb) { ++ printk(KERN_ERR DRIVER_NAME ": failed to allocate " ++ "mailbox memory\n"); ++ err = -ENOMEM; ++ goto err; ++ } ++ ++ res = platform_get_resource(dev, IORESOURCE_MEM, 0); ++ ++ platform_set_drvdata(dev, ucb); ++ ucb->base = __io_address(GPIO_BASE); ++ ++ ucb->gc.label = "bcm2708_gpio"; ++ ucb->gc.base = 0; ++ ucb->gc.ngpio = BCM2708_NR_GPIOS; ++ ucb->gc.owner = THIS_MODULE; ++ ++ ucb->gc.direction_input = bcm2708_gpio_dir_in; ++ ucb->gc.direction_output = bcm2708_gpio_dir_out; ++ ucb->gc.get = bcm2708_gpio_get; ++ ucb->gc.set = bcm2708_gpio_set; ++ ucb->gc.can_sleep = 0; ++ ++ for (bank = 0; bank < GPIO_BANKS; bank++) { ++ writel(0, ucb->base + GPIOREN(bank)); ++ writel(0, ucb->base + GPIOFEN(bank)); ++ writel(0, ucb->base + GPIOHEN(bank)); ++ writel(0, ucb->base + GPIOLEN(bank)); ++ writel(0, ucb->base + GPIOAREN(bank)); ++ writel(0, ucb->base + GPIOAFEN(bank)); ++ writel(~0, ucb->base + GPIOEDS(bank)); ++ } ++ ++ bcm2708_gpio_irq_init(ucb); ++ ++ err = gpiochip_add(&ucb->gc); ++ ++err: ++ return err; ++ ++} ++ ++static int bcm2708_gpio_remove(struct platform_device *dev) ++{ ++ int err = 0; ++ struct bcm2708_gpio *ucb = platform_get_drvdata(dev); ++ ++ printk(KERN_ERR DRIVER_NAME ": bcm2708_gpio_remove %p\n", dev); ++ ++ gpiochip_remove(&ucb->gc); ++ ++ platform_set_drvdata(dev, NULL); ++ kfree(ucb); ++ ++ return err; ++} ++ ++static struct platform_driver bcm2708_gpio_driver = { ++ .probe = bcm2708_gpio_probe, ++ .remove = bcm2708_gpio_remove, ++ .driver = { ++ .name = "bcm2708_gpio"}, ++}; ++ ++static int __init bcm2708_gpio_init(void) ++{ ++ return platform_driver_register(&bcm2708_gpio_driver); ++} ++ ++static void __exit bcm2708_gpio_exit(void) ++{ ++ platform_driver_unregister(&bcm2708_gpio_driver); ++} ++ ++module_init(bcm2708_gpio_init); ++module_exit(bcm2708_gpio_exit); ++ ++MODULE_DESCRIPTION("Broadcom BCM2708 GPIO driver"); ++MODULE_LICENSE("GPL"); +--- /dev/null ++++ b/arch/arm/mach-bcm2708/include/mach/gpio.h +@@ -0,0 +1,17 @@ ++/* ++ * arch/arm/mach-bcm2708/include/mach/gpio.h ++ * ++ * This file is licensed under the terms of the GNU General Public ++ * License version 2. This program is licensed "as is" without any ++ * warranty of any kind, whether express or implied. ++ */ ++ ++#ifndef __ASM_ARCH_GPIO_H ++#define __ASM_ARCH_GPIO_H ++ ++#define BCM2708_NR_GPIOS 54 // number of gpio lines ++ ++#define gpio_to_irq(x) ((x) + GPIO_IRQ_START) ++#define irq_to_gpio(x) ((x) - GPIO_IRQ_START) ++ ++#endif +--- a/arch/arm/mach-bcm2709/bcm2709.c ++++ b/arch/arm/mach-bcm2709/bcm2709.c +@@ -329,6 +329,31 @@ static struct platform_device bcm2708_vc + }, + }; + ++#ifdef CONFIG_BCM2708_GPIO ++#define BCM_GPIO_DRIVER_NAME "bcm2708_gpio" ++ ++static struct resource bcm2708_gpio_resources[] = { ++ [0] = { /* general purpose I/O */ ++ .start = GPIO_BASE, ++ .end = GPIO_BASE + SZ_4K - 1, ++ .flags = IORESOURCE_MEM, ++ }, ++}; ++ ++static u64 gpio_dmamask = DMA_BIT_MASK(DMA_MASK_BITS_COMMON); ++ ++static struct platform_device bcm2708_gpio_device = { ++ .name = BCM_GPIO_DRIVER_NAME, ++ .id = -1, /* only one VideoCore I/O area */ ++ .resource = bcm2708_gpio_resources, ++ .num_resources = ARRAY_SIZE(bcm2708_gpio_resources), ++ .dev = { ++ .dma_mask = &gpio_dmamask, ++ .coherent_dma_mask = DMA_BIT_MASK(DMA_MASK_BITS_COMMON), ++ }, ++}; ++#endif ++ + int __init bcm_register_device(struct platform_device *pdev) + { + int ret; +--- /dev/null ++++ b/include/linux/platform_data/bcm2708.h +@@ -0,0 +1,23 @@ ++/* ++ * include/linux/platform_data/bcm2708.h ++ * ++ * This program is free software; you can redistribute it and/or modify ++ * it under the terms of the GNU General Public License version 2 as ++ * published by the Free Software Foundation. ++ * ++ * (C) 2014 Julian Scheel <julian@jusst.de> ++ * ++ */ ++#ifndef __BCM2708_H_ ++#define __BCM2708_H_ ++ ++typedef enum { ++ BCM2708_PULL_OFF, ++ BCM2708_PULL_UP, ++ BCM2708_PULL_DOWN ++} bcm2708_gpio_pull_t; ++ ++extern int bcm2708_gpio_setpull(struct gpio_chip *gc, unsigned offset, ++ bcm2708_gpio_pull_t value); ++ ++#endif |