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mfd: New asic3 gpio configuration code

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The ASIC3 GPIO configuration code is a bit obscure and hardly readable.
This patch changes it so that it is now more readable and understandable,
by being more explicit.

Signed-off-by: Samuel Ortiz <sameo@openedhand.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Samuel Ortiz 2008-06-20 11:09:51 +02:00 • committed by Samuel Ortiz
parent 1effe5bc6c
commit 3b26bf1722
2 changed files with 66 additions and 65 deletions
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34
include/linux/mfd/asic3.h
View file

@ -8,7 +8,7 @@
* published by the Free Software Foundation.
*
* Copyright 2001 Compaq Computer Corporation.
* Copyright 2007 OpendHand.
* Copyright 2007-2008 OpenedHand Ltd.
*/
#ifndef __ASIC3_H__
@ -17,15 +17,8 @@
#include <linux/types.h>
struct asic3_platform_data {
struct {
u32 dir;
u32 init;
u32 sleep_mask;
u32 sleep_out;
u32 batt_fault_out;
u32 sleep_conf;
u32 alt_function;
} gpio_a, gpio_b, gpio_c, gpio_d;
u16 *gpio_config;
unsigned int gpio_config_num;
unsigned int bus_shift;
@ -86,6 +79,27 @@ struct asic3_platform_data {
*/
#define ASIC3_GPIO_Status 0x30 /* R Pin status */
/*
* ASIC3 GPIO config
*
* Bits 0..6 gpio number
* Bits 7..13 Alternate function
* Bit 14 Direction
* Bit 15 Initial value
*
*/
#define ASIC3_CONFIG_GPIO_PIN(config) ((config) & 0x7f)
#define ASIC3_CONFIG_GPIO_ALT(config) (((config) & (0x7f << 7)) >> 7)
#define ASIC3_CONFIG_GPIO_DIR(config) ((config & (1 << 14)) >> 14)
#define ASIC3_CONFIG_GPIO_INIT(config) ((config & (1 << 15)) >> 15)
#define ASIC3_CONFIG_GPIO(gpio, alt, dir, init) (((gpio) & 0x7f) \
| (((alt) & 0x7f) << 7) | (((dir) & 0x1) << 14) \
| (((init) & 0x1) << 15))
#define ASIC3_CONFIG_GPIO_DEFAULT(gpio, dir, init) \
ASIC3_CONFIG_GPIO((gpio), 0, (dir), (init))
#define ASIC3_CONFIG_GPIO_DEFAULT_OUT(gpio, init) \
ASIC3_CONFIG_GPIO((gpio), 0, 1, (init))
#define ASIC3_SPI_Base 0x0400
#define ASIC3_SPI_Control 0x0000
#define ASIC3_SPI_TxData 0x0004