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030a77fc9b
The gpiomux.h header contains some SOC ifdefs. However, the API that is actually used by the GPIO driver only uses two functions that are general. Move these general definitions into a public header file. Change-Id: Ia5df8af87dba268225598d56908e523bcfc24ef6 Signed-off-by: David Brown <davidb@codeaurora.org> Acked-by: Linus Walleij <linus.walleij@linaro.org> Acked-by: Nicolas Pitre <nicolas.pitre@linaro.org>
100 lines
3.2 KiB
C
100 lines
3.2 KiB
C
/* Copyright (c) 2010, Code Aurora Forum. All rights reserved.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 and
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* only version 2 as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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* 02110-1301, USA.
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*/
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#ifndef __ARCH_ARM_MACH_MSM_GPIOMUX_H
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#define __ARCH_ARM_MACH_MSM_GPIOMUX_H
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#include <linux/bitops.h>
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#include <linux/errno.h>
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#include <mach/msm_gpiomux.h>
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#if defined(CONFIG_MSM_V2_TLMM)
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#include "gpiomux-v2.h"
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#else
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#include "gpiomux-v1.h"
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#endif
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/**
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* struct msm_gpiomux_config: gpiomux settings for one gpio line.
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*
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* A complete gpiomux config is the bitwise-or of a drive-strength,
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* function, and pull. For functions other than GPIO, the OE
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* is hard-wired according to the function. For GPIO mode,
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* OE is controlled by gpiolib.
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*
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* Available settings differ by target; see the gpiomux header
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* specific to your target arch for available configurations.
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*
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* @active: The configuration to be installed when the line is
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* active, or its reference count is > 0.
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* @suspended: The configuration to be installed when the line
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* is suspended, or its reference count is 0.
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* @ref: The reference count of the line. For internal use of
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* the gpiomux framework only.
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*/
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struct msm_gpiomux_config {
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gpiomux_config_t active;
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gpiomux_config_t suspended;
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unsigned ref;
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};
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/**
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* @GPIOMUX_VALID: If set, the config field contains 'good data'.
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* The absence of this bit will prevent the gpiomux
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* system from applying the configuration under all
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* circumstances.
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*/
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enum {
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GPIOMUX_VALID = BIT(sizeof(gpiomux_config_t) * BITS_PER_BYTE - 1),
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GPIOMUX_CTL_MASK = GPIOMUX_VALID,
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};
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#ifdef CONFIG_MSM_GPIOMUX
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/* Each architecture must provide its own instance of this table.
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* To avoid having gpiomux manage any given gpio, one or both of
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* the entries can avoid setting GPIOMUX_VALID - the absence
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* of that flag will prevent the configuration from being applied
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* during state transitions.
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*/
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extern struct msm_gpiomux_config msm_gpiomux_configs[GPIOMUX_NGPIOS];
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/* Install a new configuration to the gpio line. To avoid overwriting
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* a configuration, leave the VALID bit out.
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*/
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int msm_gpiomux_write(unsigned gpio,
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gpiomux_config_t active,
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gpiomux_config_t suspended);
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/* Architecture-internal function for use by the framework only.
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* This function can assume the following:
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* - the gpio value has passed a bounds-check
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* - the gpiomux spinlock has been obtained
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*
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* This function is not for public consumption. External users
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* should use msm_gpiomux_write.
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*/
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void __msm_gpiomux_write(unsigned gpio, gpiomux_config_t val);
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#else
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static inline int msm_gpiomux_write(unsigned gpio,
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gpiomux_config_t active,
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gpiomux_config_t suspended)
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{
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return -ENOSYS;
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}
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#endif
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#endif
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