26dd3e4ff9
Historically a lot of these existed because we did not have a distinction between what was modular code and what was providing support to modules via EXPORT_SYMBOL and friends. That changed when we forked out support for the latter into the export.h file. This means we should be able to reduce the usage of module.h in code that is obj-y Makefile or bool Kconfig. In the case of some code where it is modular, we can extend that to also include files that are building basic support functionality but not related to loading or registering the final module; such files also have no need whatsoever for module.h The advantage in removing such instances is that module.h itself sources about 15 other headers; adding significantly to what we feed cpp, and it can obscure what headers we are effectively using. Since module.h might have been the implicit source for init.h (for __init) and for export.h (for EXPORT_SYMBOL) we consider each instance for the presence of either and replace/add as needed. Also note that MODULE_DEVICE_TABLE is a no-op for non-modular code. Build coverage of all the mips defconfigs revealed the module.h header was masking a couple of implicit include instances, so we add the appropriate headers there. Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com> Cc: David Daney <david.daney@cavium.com> Cc: John Crispin <john@phrozen.org> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: "Steven J. Hill" <steven.hill@cavium.com> Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/15131/ [james.hogan@imgtec.com: Preserve sort order where it already exists] Signed-off-by: James Hogan <james.hogan@imgtec.com>
152 lines
3.2 KiB
C
152 lines
3.2 KiB
C
/*
|
|
* This file is subject to the terms and conditions of the GNU General Public
|
|
* License. See the file "COPYING" in the main directory of this archive
|
|
* for more details.
|
|
*
|
|
* Copyright (C) 2008 Maxime Bizon <mbizon@freebox.fr>
|
|
* Copyright (C) 2008-2011 Florian Fainelli <florian@openwrt.org>
|
|
*/
|
|
|
|
#include <linux/kernel.h>
|
|
#include <linux/init.h>
|
|
#include <linux/spinlock.h>
|
|
#include <linux/platform_device.h>
|
|
#include <linux/gpio/driver.h>
|
|
|
|
#include <bcm63xx_cpu.h>
|
|
#include <bcm63xx_gpio.h>
|
|
#include <bcm63xx_io.h>
|
|
#include <bcm63xx_regs.h>
|
|
|
|
static u32 gpio_out_low_reg;
|
|
|
|
static void bcm63xx_gpio_out_low_reg_init(void)
|
|
{
|
|
switch (bcm63xx_get_cpu_id()) {
|
|
case BCM6345_CPU_ID:
|
|
gpio_out_low_reg = GPIO_DATA_LO_REG_6345;
|
|
break;
|
|
default:
|
|
gpio_out_low_reg = GPIO_DATA_LO_REG;
|
|
break;
|
|
}
|
|
}
|
|
|
|
static DEFINE_SPINLOCK(bcm63xx_gpio_lock);
|
|
static u32 gpio_out_low, gpio_out_high;
|
|
|
|
static void bcm63xx_gpio_set(struct gpio_chip *chip,
|
|
unsigned gpio, int val)
|
|
{
|
|
u32 reg;
|
|
u32 mask;
|
|
u32 *v;
|
|
unsigned long flags;
|
|
|
|
if (gpio >= chip->ngpio)
|
|
BUG();
|
|
|
|
if (gpio < 32) {
|
|
reg = gpio_out_low_reg;
|
|
mask = 1 << gpio;
|
|
v = &gpio_out_low;
|
|
} else {
|
|
reg = GPIO_DATA_HI_REG;
|
|
mask = 1 << (gpio - 32);
|
|
v = &gpio_out_high;
|
|
}
|
|
|
|
spin_lock_irqsave(&bcm63xx_gpio_lock, flags);
|
|
if (val)
|
|
*v |= mask;
|
|
else
|
|
*v &= ~mask;
|
|
bcm_gpio_writel(*v, reg);
|
|
spin_unlock_irqrestore(&bcm63xx_gpio_lock, flags);
|
|
}
|
|
|
|
static int bcm63xx_gpio_get(struct gpio_chip *chip, unsigned gpio)
|
|
{
|
|
u32 reg;
|
|
u32 mask;
|
|
|
|
if (gpio >= chip->ngpio)
|
|
BUG();
|
|
|
|
if (gpio < 32) {
|
|
reg = gpio_out_low_reg;
|
|
mask = 1 << gpio;
|
|
} else {
|
|
reg = GPIO_DATA_HI_REG;
|
|
mask = 1 << (gpio - 32);
|
|
}
|
|
|
|
return !!(bcm_gpio_readl(reg) & mask);
|
|
}
|
|
|
|
static int bcm63xx_gpio_set_direction(struct gpio_chip *chip,
|
|
unsigned gpio, int dir)
|
|
{
|
|
u32 reg;
|
|
u32 mask;
|
|
u32 tmp;
|
|
unsigned long flags;
|
|
|
|
if (gpio >= chip->ngpio)
|
|
BUG();
|
|
|
|
if (gpio < 32) {
|
|
reg = GPIO_CTL_LO_REG;
|
|
mask = 1 << gpio;
|
|
} else {
|
|
reg = GPIO_CTL_HI_REG;
|
|
mask = 1 << (gpio - 32);
|
|
}
|
|
|
|
spin_lock_irqsave(&bcm63xx_gpio_lock, flags);
|
|
tmp = bcm_gpio_readl(reg);
|
|
if (dir == BCM63XX_GPIO_DIR_IN)
|
|
tmp &= ~mask;
|
|
else
|
|
tmp |= mask;
|
|
bcm_gpio_writel(tmp, reg);
|
|
spin_unlock_irqrestore(&bcm63xx_gpio_lock, flags);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int bcm63xx_gpio_direction_input(struct gpio_chip *chip, unsigned gpio)
|
|
{
|
|
return bcm63xx_gpio_set_direction(chip, gpio, BCM63XX_GPIO_DIR_IN);
|
|
}
|
|
|
|
static int bcm63xx_gpio_direction_output(struct gpio_chip *chip,
|
|
unsigned gpio, int value)
|
|
{
|
|
bcm63xx_gpio_set(chip, gpio, value);
|
|
return bcm63xx_gpio_set_direction(chip, gpio, BCM63XX_GPIO_DIR_OUT);
|
|
}
|
|
|
|
|
|
static struct gpio_chip bcm63xx_gpio_chip = {
|
|
.label = "bcm63xx-gpio",
|
|
.direction_input = bcm63xx_gpio_direction_input,
|
|
.direction_output = bcm63xx_gpio_direction_output,
|
|
.get = bcm63xx_gpio_get,
|
|
.set = bcm63xx_gpio_set,
|
|
.base = 0,
|
|
};
|
|
|
|
int __init bcm63xx_gpio_init(void)
|
|
{
|
|
bcm63xx_gpio_out_low_reg_init();
|
|
|
|
gpio_out_low = bcm_gpio_readl(gpio_out_low_reg);
|
|
if (!BCMCPU_IS_6345())
|
|
gpio_out_high = bcm_gpio_readl(GPIO_DATA_HI_REG);
|
|
bcm63xx_gpio_chip.ngpio = bcm63xx_gpio_count();
|
|
pr_info("registering %d GPIOs\n", bcm63xx_gpio_chip.ngpio);
|
|
|
|
return gpiochip_add_data(&bcm63xx_gpio_chip, NULL);
|
|
}
|