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arm: lpc32xx: gpio macro for pin mapping

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Add LPC32xx GPIO interface macro for pin mapping.

Signed-off-by: Sylvain Lemieux <slemieux@tycoint.com>
This commit is contained in:
Sylvain Lemieux 2015-07-27 13:37:36 -04:00 committed by Tom Rini
parent 576007aec9
commit 2783fe6903
1 changed files with 40 additions and 0 deletions
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arch/arm/include/asm/arch-lpc32xx/gpio_grp.h Normal file
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/*
* LPC32xx GPIO interface macro for pin mapping.
*
* (C) Copyright 2015 DENX Software Engineering GmbH
* Written-by: Sylvain Lemieux <slemieux@@tycoint.com>
*
* SPDX-License-Identifier: GPL-2.0+
*/
#ifndef _LPC32XX_GPIO_GRP_H
#define _LPC32XX_GPIO_GRP_H
/*
* Macro to map the pin for the lpc32xx_gpio driver.
* Note: - GPIOS are considered here as homogeneous and linear, from 0 to 127;
* mapping is done per register, as group of 32.
* (see drivers/gpio/lpc32xx_gpio.c for details).
* - macros can be use with the following pins:
* P0.0 - P0.7
* P1.0 - P1.23
* P2.0 - P2.12
* P3 GPI_0 - GPI_9 / GPI_15 - GPI_23 / GPI_25 / GPI_27 - GPI_28
* P3 GPO_0 - GPO_23
* P3 GPIO_0 - GPIO_5 (output register only)
*/
#define LPC32XX_GPIO_P0_GRP 0
#define LPC32XX_GPIO_P1_GRP 32
#define LPC32XX_GPIO_P2_GRP 64
#define LPC32XX_GPI_P3_GRP 96
#define LPC32XX_GPO_P3_GRP 96
#define LPC32XX_GPIO_P3_GRP (LPC32XX_GPO_P3_GRP + 25)
/*
* A specific GPIO can be selected with this macro
* ie, GPIO P0.1 can be selected with LPC32XX_GPIO(LPC32XX_GPIO_P0_GRP, 1)
* See the LPC32x0 User's guide for GPIO group numbers
*/
#define LPC32XX_GPIO(x, y) ((x) + (y))
#endif /* _LPC32XX_GPIO_GRP_H */