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yaml
---
r: 340083
b: refs/heads/master
c: cab18d1
h: refs/heads/master
i:
  340081: d100f4a
  340079: a5038d7
v: v3
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Olof Johansson committed Nov 21, 2012
1 parent 3a43239 commit 7d41890
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Showing 15 changed files with 559 additions and 141 deletions.
2 changes: 1 addition & 1 deletion [refs]
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@@ -1,2 +1,2 @@
---
refs/heads/master: c3e5dba4ee862a23c9f2273b9ddd492047cbfb15
refs/heads/master: cab18d19bb05452fc7f5c45f7964643bdae80c92
2 changes: 2 additions & 0 deletions trunk/arch/arm/Kconfig
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Expand Up @@ -367,6 +367,8 @@ config ARCH_CNS3XXX

config ARCH_CLPS711X
bool "Cirrus Logic CLPS711x/EP721x/EP731x-based"
select ARCH_REQUIRE_GPIOLIB
select ARCH_USES_GETTIMEOFFSET
select CLKDEV_LOOKUP
select COMMON_CLK
select CPU_ARM720T
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15 changes: 15 additions & 0 deletions trunk/drivers/gpio/Kconfig
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Expand Up @@ -86,11 +86,26 @@ config GPIO_DA9052
help
Say yes here to enable the GPIO driver for the DA9052 chip.

config GPIO_DA9055
tristate "Dialog Semiconductor DA9055 GPIO"
depends on MFD_DA9055
help
Say yes here to enable the GPIO driver for the DA9055 chip.

The Dialog DA9055 PMIC chip has 3 GPIO pins that can be
be controller by this driver.

If driver is built as a module it will be called gpio-da9055.

config GPIO_MAX730X
tristate

comment "Memory mapped GPIO drivers:"

config GPIO_CLPS711X
def_bool y
depends on ARCH_CLPS711X

config GPIO_GENERIC_PLATFORM
tristate "Generic memory-mapped GPIO controller support (MMIO platform device)"
select GPIO_GENERIC
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2 changes: 2 additions & 0 deletions trunk/drivers/gpio/Makefile
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Expand Up @@ -16,8 +16,10 @@ obj-$(CONFIG_GPIO_ADP5588) += gpio-adp5588.o
obj-$(CONFIG_GPIO_AMD8111) += gpio-amd8111.o
obj-$(CONFIG_GPIO_ARIZONA) += gpio-arizona.o
obj-$(CONFIG_GPIO_BT8XX) += gpio-bt8xx.o
obj-$(CONFIG_GPIO_CLPS711X) += gpio-clps711x.o
obj-$(CONFIG_GPIO_CS5535) += gpio-cs5535.o
obj-$(CONFIG_GPIO_DA9052) += gpio-da9052.o
obj-$(CONFIG_GPIO_DA9055) += gpio-da9055.o
obj-$(CONFIG_ARCH_DAVINCI) += gpio-davinci.o
obj-$(CONFIG_GPIO_EM) += gpio-em.o
obj-$(CONFIG_GPIO_EP93XX) += gpio-ep93xx.o
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199 changes: 199 additions & 0 deletions trunk/drivers/gpio/gpio-clps711x.c
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@@ -0,0 +1,199 @@
/*
* CLPS711X GPIO driver
*
* Copyright (C) 2012 Alexander Shiyan <shc_work@mail.ru>
*
* 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/io.h>
#include <linux/slab.h>
#include <linux/gpio.h>
#include <linux/module.h>
#include <linux/spinlock.h>
#include <linux/platform_device.h>

#include <mach/hardware.h>

#define CLPS711X_GPIO_PORTS 5
#define CLPS711X_GPIO_NAME "gpio-clps711x"

struct clps711x_gpio {
struct gpio_chip chip[CLPS711X_GPIO_PORTS];
spinlock_t lock;
};

static void __iomem *clps711x_ports[] = {
CLPS711X_VIRT_BASE + PADR,
CLPS711X_VIRT_BASE + PBDR,
CLPS711X_VIRT_BASE + PCDR,
CLPS711X_VIRT_BASE + PDDR,
CLPS711X_VIRT_BASE + PEDR,
};

static void __iomem *clps711x_pdirs[] = {
CLPS711X_VIRT_BASE + PADDR,
CLPS711X_VIRT_BASE + PBDDR,
CLPS711X_VIRT_BASE + PCDDR,
CLPS711X_VIRT_BASE + PDDDR,
CLPS711X_VIRT_BASE + PEDDR,
};

#define clps711x_port(x) clps711x_ports[x->base / 8]
#define clps711x_pdir(x) clps711x_pdirs[x->base / 8]

static int gpio_clps711x_get(struct gpio_chip *chip, unsigned offset)
{
return !!(readb(clps711x_port(chip)) & (1 << offset));
}

static void gpio_clps711x_set(struct gpio_chip *chip, unsigned offset,
int value)
{
int tmp;
unsigned long flags;
struct clps711x_gpio *gpio = dev_get_drvdata(chip->dev);

spin_lock_irqsave(&gpio->lock, flags);
tmp = readb(clps711x_port(chip)) & ~(1 << offset);
if (value)
tmp |= 1 << offset;
writeb(tmp, clps711x_port(chip));
spin_unlock_irqrestore(&gpio->lock, flags);
}

static int gpio_clps711x_dir_in(struct gpio_chip *chip, unsigned offset)
{
int tmp;
unsigned long flags;
struct clps711x_gpio *gpio = dev_get_drvdata(chip->dev);

spin_lock_irqsave(&gpio->lock, flags);
tmp = readb(clps711x_pdir(chip)) & ~(1 << offset);
writeb(tmp, clps711x_pdir(chip));
spin_unlock_irqrestore(&gpio->lock, flags);

return 0;
}

static int gpio_clps711x_dir_out(struct gpio_chip *chip, unsigned offset,
int value)
{
int tmp;
unsigned long flags;
struct clps711x_gpio *gpio = dev_get_drvdata(chip->dev);

spin_lock_irqsave(&gpio->lock, flags);
tmp = readb(clps711x_pdir(chip)) | (1 << offset);
writeb(tmp, clps711x_pdir(chip));
tmp = readb(clps711x_port(chip)) & ~(1 << offset);
if (value)
tmp |= 1 << offset;
writeb(tmp, clps711x_port(chip));
spin_unlock_irqrestore(&gpio->lock, flags);

return 0;
}

static int gpio_clps711x_dir_in_inv(struct gpio_chip *chip, unsigned offset)
{
int tmp;
unsigned long flags;
struct clps711x_gpio *gpio = dev_get_drvdata(chip->dev);

spin_lock_irqsave(&gpio->lock, flags);
tmp = readb(clps711x_pdir(chip)) | (1 << offset);
writeb(tmp, clps711x_pdir(chip));
spin_unlock_irqrestore(&gpio->lock, flags);

return 0;
}

static int gpio_clps711x_dir_out_inv(struct gpio_chip *chip, unsigned offset,
int value)
{
int tmp;
unsigned long flags;
struct clps711x_gpio *gpio = dev_get_drvdata(chip->dev);

spin_lock_irqsave(&gpio->lock, flags);
tmp = readb(clps711x_pdir(chip)) & ~(1 << offset);
writeb(tmp, clps711x_pdir(chip));
tmp = readb(clps711x_port(chip)) & ~(1 << offset);
if (value)
tmp |= 1 << offset;
writeb(tmp, clps711x_port(chip));
spin_unlock_irqrestore(&gpio->lock, flags);

return 0;
}

static struct {
char *name;
int nr;
int inv_dir;
} clps711x_gpio_ports[] __initconst = {
{ "PORTA", 8, 0, },
{ "PORTB", 8, 0, },
{ "PORTC", 8, 0, },
{ "PORTD", 8, 1, },
{ "PORTE", 3, 0, },
};

static int __init gpio_clps711x_init(void)
{
int i;
struct platform_device *pdev;
struct clps711x_gpio *gpio;

pdev = platform_device_alloc(CLPS711X_GPIO_NAME, 0);
if (!pdev) {
pr_err("Cannot create platform device: %s\n",
CLPS711X_GPIO_NAME);
return -ENOMEM;
}

platform_device_add(pdev);

gpio = devm_kzalloc(&pdev->dev, sizeof(struct clps711x_gpio),
GFP_KERNEL);
if (!gpio) {
dev_err(&pdev->dev, "GPIO allocating memory error\n");
platform_device_unregister(pdev);
return -ENOMEM;
}

platform_set_drvdata(pdev, gpio);

spin_lock_init(&gpio->lock);

for (i = 0; i < CLPS711X_GPIO_PORTS; i++) {
gpio->chip[i].owner = THIS_MODULE;
gpio->chip[i].dev = &pdev->dev;
gpio->chip[i].label = clps711x_gpio_ports[i].name;
gpio->chip[i].base = i * 8;
gpio->chip[i].ngpio = clps711x_gpio_ports[i].nr;
gpio->chip[i].get = gpio_clps711x_get;
gpio->chip[i].set = gpio_clps711x_set;
if (!clps711x_gpio_ports[i].inv_dir) {
gpio->chip[i].direction_input = gpio_clps711x_dir_in;
gpio->chip[i].direction_output = gpio_clps711x_dir_out;
} else {
gpio->chip[i].direction_input = gpio_clps711x_dir_in_inv;
gpio->chip[i].direction_output = gpio_clps711x_dir_out_inv;
}
WARN_ON(gpiochip_add(&gpio->chip[i]));
}

dev_info(&pdev->dev, "GPIO driver initialized\n");

return 0;
}
arch_initcall(gpio_clps711x_init);

MODULE_LICENSE("GPL v2");
MODULE_AUTHOR("Alexander Shiyan <shc_work@mail.ru>");
MODULE_DESCRIPTION("CLPS711X GPIO driver");
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