mx31: remove gpio_request calls from iomux code
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>
diff --git a/arch/arm/mach-mx3/iomux.c b/arch/arm/mach-mx3/iomux.c
index 40ffc5a..c66ccbc 100644
--- a/arch/arm/mach-mx3/iomux.c
+++ b/arch/arm/mach-mx3/iomux.c
@@ -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 @@
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 @@
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 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 @@
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);