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gpio: add GPIO driver for the Timberdale FPGA

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A GPIO driver for the Timberdale FPGA found on the Intel Atom board
Russellville.

The GPIO driver also has an IRQ-chip to support interrupts on the pins.

Signed-off-by: Richard Röjfors <richard.rojfors@mocean-labs.com>
Cc: David Brownell <david-b@pacbell.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Richard Röjfors 2009-12-15 16:46:18 -08:00 • committed by Linus Torvalds
parent 4efec6272e
commit 35570ac603
4 changed files with 386 additions and 0 deletions
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37
include/linux/timb_gpio.h Normal file
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/*
* timb_gpio.h timberdale FPGA GPIO driver, platform data definition
* Copyright (c) 2009 Intel Corporation
*
* 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.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#ifndef _LINUX_TIMB_GPIO_H
#define _LINUX_TIMB_GPIO_H
/**
* struct timbgpio_platform_data - Platform data of the Timberdale GPIO driver
* @gpio_base The number of the first GPIO pin, set to -1 for
* dynamic number allocation.
* @nr_pins Number of pins that is supported by the hardware (1-32)
* @irq_base If IRQ is supported by the hardware, this is the base
* number of IRQ:s. One IRQ per pin will be used. Set to
* -1 if IRQ:s is not supported.
*/
struct timbgpio_platform_data {
int gpio_base;
int nr_pins;
int irq_base;
};
#endif