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/*
* Freescale STMP378X PWM LEDs pin multiplexing
*
* Author: Drew Bendetti <drewb@embeddedalley.com>
*
* Copyright 2008-2009 Freescale Semiconductor, Inc. All Rights Reserved.
* Copyright 2008 Embedded Alley Solutions, Inc All Rights Reserved.
*/
/*
* The code contained herein is licensed under the GNU General Public
* License. You may obtain a copy of the GNU General Public License
* Version 2 or later at the following locations:
*
* http://www.opensource.org/licenses/gpl-license.html
* http://www.gnu.org/copyleft/gpl.html
*/
#include <linux/kernel.h>
#include <linux/io.h>
#include <linux/module.h>
#include <mach/pinmux.h>
#define PWM_PINID(n) STMP3XXX_PINID(1, 26 + n)
int pwm_led_pinmux_request(int pwmn, char *title)
{
int rc = 0;
/* PIN_FUN1 is PWM for these pins */
rc = stmp3xxx_request_pin(PWM_PINID(pwmn), PIN_FUN1, title);
if (rc)
return rc;
stmp3xxx_pin_voltage(PWM_PINID(pwmn), PIN_3_3V, title);
/* pwm0-3 support 4,8,12mA; pwm4 supports 8,16,24mA
* I'm forcing 8 here since it's the only one in common
*/
stmp3xxx_pin_strength(PWM_PINID(pwmn), PIN_8MA, title);
return 0;
}
EXPORT_SYMBOL_GPL(pwm_led_pinmux_request);
void pwm_led_pinmux_free(int pwmn, char *title)
{
stmp3xxx_pin_voltage(PWM_PINID(pwmn), PIN_4MA, title);
stmp3xxx_pin_strength(PWM_PINID(pwmn), PIN_1_8V, title);
stmp3xxx_release_pin(PWM_PINID(pwmn), title);
}
EXPORT_SYMBOL_GPL(pwm_led_pinmux_free);
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Drew Benedetti <drewb@embeddedalley.com>");
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