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linux-sg2042/arch/arm/mach-msm/gpiomux-v1.h

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msm: add gpiomux api for gpio multiplex & configuration. Add the 'gpiomux' api, which addresses the following shortcomings of existing tlmm api: - gpio power-collapse, which is managed by a peripheral processor on other targets, must be managed by the application processor on the 8x60. - The enable/disable flag of the legacy gpio_tlmm_config api is not applicable on the 8x60, and causes confusion. - The gpio 'direction' bits are meaningless for all func_sel configurations except for generic-gpio mode (func_sel 0), in which case the gpio_direction_* functions should be used. Having these bits in the tlmm api leads to confusion and misuse of the gpiolib api, and they have been removed in gpiomux. - The functional api of the legacy system ran contrary to the typical use-case, which is a single massive configuration at boot. Rather than forcing hundreds of 'config' function calls, the new api allows data to be configured with a single table. gpiomux_get and gpiomux_put are meant to be called automatically when gpio_request and gpio_free are called, giving automatic gpiomux/tlmm control to those drivers/lines with simple power profiles - in the simplest cases, an entry in the gpiomux table and the correct usage of gpiolib is all that is required to get proper gpio power control. Signed-off-by: Gregory Bean <gbean@codeaurora.org> Signed-off-by: Daniel Walker <dwalker@codeaurora.org>
2010-08-29 01:05:44 +08:00
/* Copyright (c) 2010, Code Aurora Forum. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 and
* only version 2 as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
* 02110-1301, USA.
*/
#ifndef __ARCH_ARM_MACH_MSM_GPIOMUX_V1_H
#define __ARCH_ARM_MACH_MSM_GPIOMUX_V1_H
#if defined(CONFIG_ARCH_MSM7X30)
#define GPIOMUX_NGPIOS 182
#elif defined(CONFIG_ARCH_QSD8X50)
#define GPIOMUX_NGPIOS 165
#else
#define GPIOMUX_NGPIOS 133
#endif
typedef u32 gpiomux_config_t;
enum {
GPIOMUX_DRV_2MA = 0UL << 17,
GPIOMUX_DRV_4MA = 1UL << 17,
GPIOMUX_DRV_6MA = 2UL << 17,
GPIOMUX_DRV_8MA = 3UL << 17,
GPIOMUX_DRV_10MA = 4UL << 17,
GPIOMUX_DRV_12MA = 5UL << 17,
GPIOMUX_DRV_14MA = 6UL << 17,
GPIOMUX_DRV_16MA = 7UL << 17,
};
enum {
GPIOMUX_FUNC_GPIO = 0UL,
GPIOMUX_FUNC_1 = 1UL,
GPIOMUX_FUNC_2 = 2UL,
GPIOMUX_FUNC_3 = 3UL,
GPIOMUX_FUNC_4 = 4UL,
GPIOMUX_FUNC_5 = 5UL,
GPIOMUX_FUNC_6 = 6UL,
GPIOMUX_FUNC_7 = 7UL,
GPIOMUX_FUNC_8 = 8UL,
GPIOMUX_FUNC_9 = 9UL,
GPIOMUX_FUNC_A = 10UL,
GPIOMUX_FUNC_B = 11UL,
GPIOMUX_FUNC_C = 12UL,
GPIOMUX_FUNC_D = 13UL,
GPIOMUX_FUNC_E = 14UL,
GPIOMUX_FUNC_F = 15UL,
};
enum {
GPIOMUX_PULL_NONE = 0UL << 15,
GPIOMUX_PULL_DOWN = 1UL << 15,
GPIOMUX_PULL_KEEPER = 2UL << 15,
GPIOMUX_PULL_UP = 3UL << 15,
};
#endif