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mx31: remove gpio_request calls from iomux code

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Since iomux code is not directly related to gpio on mx31, the calls
to gpio_request are removed from iomux.c file.

These calls have to be done in platform initialization files. The
name of the singe pin call for iomux is also changed to
mxc_iomux_alloc_pin.

Signed-off-by: Valentin Longchamp <valentin.longchamp@epfl.ch>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
This commit is contained in:
Valentin Longchamp 2009-05-06 11:44:20 +02:00 committed by Sascha Hauer
parent 35c82da0bf
commit ef754d6358
2 changed files with 7 additions and 20 deletions
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25
arch/arm/mach-mx3/iomux.c
View File

@ -21,7 +21,6 @@
#include <linux/module.h>
#include <linux/spinlock.h>
#include <linux/io.h>
#include <linux/gpio.h>
#include <linux/kernel.h>
#include <mach/hardware.h>
#include <mach/gpio.h>
@ -94,15 +93,13 @@ void mxc_iomux_set_pad(enum iomux_pins pin, u32 config)
EXPORT_SYMBOL(mxc_iomux_set_pad);
/*
* setups a single pin:
* allocs a single pin:
* - reserves the pin so that it is not claimed by another driver
* - setups the iomux according to the configuration
* - if the pin is configured as a GPIO, we claim it through kernel gpiolib
*/
int mxc_iomux_setup_pin(const unsigned int pin, const char *label)
int mxc_iomux_alloc_pin(const unsigned int pin, const char *label)
{
unsigned pad = pin & IOMUX_PADNUM_MASK;
unsigned gpio;
if (pad >= (PIN_MAX + 1)) {
printk(KERN_ERR "mxc_iomux: Attempt to request nonexistant pin %u for \"%s\"\n",
@ -113,19 +110,13 @@ int mxc_iomux_setup_pin(const unsigned int pin, const char *label)
if (test_and_set_bit(pad, mxc_pin_alloc_map)) {
printk(KERN_ERR "mxc_iomux: pin %u already used. Allocation for \"%s\" failed\n",
pad, label ? label : "?");
return -EINVAL;
return -EBUSY;
}
mxc_iomux_mode(pin);
/* if we have a gpio, we can allocate it */
gpio = (pin & IOMUX_GPIONUM_MASK) >> IOMUX_GPIONUM_SHIFT;
if (gpio < (GPIO_PORT_MAX + 1) * 32)
if (gpio_request(gpio, label))
return -EINVAL;
return 0;
}
EXPORT_SYMBOL(mxc_iomux_setup_pin);
EXPORT_SYMBOL(mxc_iomux_alloc_pin);
int mxc_iomux_setup_multiple_pins(unsigned int *pin_list, unsigned count,
const char *label)
@ -135,7 +126,8 @@ int mxc_iomux_setup_multiple_pins(unsigned int *pin_list, unsigned count,
int ret = -EINVAL;
for (i = 0; i < count; i++) {
if (mxc_iomux_setup_pin(*p, label))
ret = mxc_iomux_alloc_pin(*p, label);
if (ret)
goto setup_error;
p++;
}
@ -150,14 +142,9 @@ EXPORT_SYMBOL(mxc_iomux_setup_multiple_pins);
void mxc_iomux_release_pin(const unsigned int pin)
{
unsigned pad = pin & IOMUX_PADNUM_MASK;
unsigned gpio;
if (pad < (PIN_MAX + 1))
clear_bit(pad, mxc_pin_alloc_map);
gpio = (pin & IOMUX_GPIONUM_MASK) >> IOMUX_GPIONUM_SHIFT;
if (gpio < (GPIO_PORT_MAX + 1) * 32)
gpio_free(gpio);
}
EXPORT_SYMBOL(mxc_iomux_release_pin);

2
arch/arm/plat-mxc/include/mach/iomux-mx3.h
View File

@ -114,7 +114,7 @@ enum iomux_gp_func {
* - setups the iomux according to the configuration
* - if the pin is configured as a GPIO, we claim it throug kernel gpiolib
*/
int mxc_iomux_setup_pin(const unsigned int pin, const char *label);
int mxc_iomux_alloc_pin(const unsigned int pin, const char *label);
/*
* setups mutliple pins
* convenient way to call the above function with tables