linux-imx

/*

 * GPIO driver for Marvell SoCs

 *

 * Copyright (C) 2012 Marvell

 *

 * Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

 * Andrew Lunn <andrew@lunn.ch>

 * Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>

 *

 * 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.

 *

 * This driver is a fairly straightforward GPIO driver for the

 * complete family of Marvell EBU SoC platforms (Orion, Dove,

 * Kirkwood, Discovery, Armada 370/XP). The only complexity of this

 * driver is the different register layout that exists between the

 * non-SMP platforms (Orion, Dove, Kirkwood, Armada 370) and the SMP

 * platforms (MV78200 from the Discovery family and the Armada

 * XP). Therefore, this driver handles three variants of the GPIO

 * block:

 * - the basic variant, called "orion-gpio", with the simplest

 *   register set. Used on Orion, Dove, Kirkwoord, Armada 370 and

 *   non-SMP Discovery systems

 * - the mv78200 variant for MV78200 Discovery systems. This variant

 *   turns the edge mask and level mask registers into CPU0 edge

 *   mask/level mask registers, and adds CPU1 edge mask/level mask

 *   registers.

 * - the armadaxp variant for Armada XP systems. This variant keeps

 *   the normal cause/edge mask/level mask registers when the global

 *   interrupts are used, but adds per-CPU cause/edge mask/level mask

 *   registers n a separate memory area for the per-CPU GPIO

 *   interrupts.

 */

​

#include <linux/bitops.h>

#include <linux/clk.h>

#include <linux/err.h>

#include <linux/gpio/driver.h>

#include <linux/gpio/consumer.h>

#include <linux/init.h>

#include <linux/io.h>

#include <linux/irq.h>

#include <linux/irqchip/chained_irq.h>

#include <linux/irqdomain.h>

#include <linux/mfd/syscon.h>

#include <linux/of_device.h>

#include <linux/of_irq.h>

#include <linux/pinctrl/consumer.h>

#include <linux/platform_device.h>

#include <linux/pwm.h>

#include <linux/regmap.h>

#include <linux/slab.h>

​

/*

 * GPIO unit register offsets.

 */

#define GPIO_OUT_OFF            0x0000

#define GPIO_IO_CONF_OFF        0x0004

#define GPIO_BLINK_EN_OFF       0x0008

#define GPIO_IN_POL_OFF         0x000c

#define GPIO_DATA_IN_OFF        0x0010

#define GPIO_EDGE_CAUSE_OFF     0x0014