mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-27 06:34:11 +08:00
eda9dcfa56
Remove gpiomux-v2 as it's not being used and make way for future improvements. Signed-off-by: Rohit Vaswani <rvaswani@codeaurora.org> Signed-off-by: David Brown <davidb@codeaurora.org>
112 lines
3.0 KiB
C
112 lines
3.0 KiB
C
/* 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.
|
|
*/
|
|
#include <linux/module.h>
|
|
#include <linux/spinlock.h>
|
|
#include "gpiomux.h"
|
|
#include "proc_comm.h"
|
|
|
|
static DEFINE_SPINLOCK(gpiomux_lock);
|
|
|
|
static void __msm_gpiomux_write(unsigned gpio, gpiomux_config_t val)
|
|
{
|
|
unsigned tlmm_config = (val & ~GPIOMUX_CTL_MASK) |
|
|
((gpio & 0x3ff) << 4);
|
|
unsigned tlmm_disable = 0;
|
|
int rc;
|
|
|
|
rc = msm_proc_comm(PCOM_RPC_GPIO_TLMM_CONFIG_EX,
|
|
&tlmm_config, &tlmm_disable);
|
|
if (rc)
|
|
pr_err("%s: unexpected proc_comm failure %d: %08x %08x\n",
|
|
__func__, rc, tlmm_config, tlmm_disable);
|
|
}
|
|
|
|
int msm_gpiomux_write(unsigned gpio,
|
|
gpiomux_config_t active,
|
|
gpiomux_config_t suspended)
|
|
{
|
|
struct msm_gpiomux_config *cfg = msm_gpiomux_configs + gpio;
|
|
unsigned long irq_flags;
|
|
gpiomux_config_t setting;
|
|
|
|
if (gpio >= GPIOMUX_NGPIOS)
|
|
return -EINVAL;
|
|
|
|
spin_lock_irqsave(&gpiomux_lock, irq_flags);
|
|
|
|
if (active & GPIOMUX_VALID)
|
|
cfg->active = active;
|
|
|
|
if (suspended & GPIOMUX_VALID)
|
|
cfg->suspended = suspended;
|
|
|
|
setting = cfg->ref ? active : suspended;
|
|
if (setting & GPIOMUX_VALID)
|
|
__msm_gpiomux_write(gpio, setting);
|
|
|
|
spin_unlock_irqrestore(&gpiomux_lock, irq_flags);
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(msm_gpiomux_write);
|
|
|
|
int msm_gpiomux_get(unsigned gpio)
|
|
{
|
|
struct msm_gpiomux_config *cfg = msm_gpiomux_configs + gpio;
|
|
unsigned long irq_flags;
|
|
|
|
if (gpio >= GPIOMUX_NGPIOS)
|
|
return -EINVAL;
|
|
|
|
spin_lock_irqsave(&gpiomux_lock, irq_flags);
|
|
if (cfg->ref++ == 0 && cfg->active & GPIOMUX_VALID)
|
|
__msm_gpiomux_write(gpio, cfg->active);
|
|
spin_unlock_irqrestore(&gpiomux_lock, irq_flags);
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(msm_gpiomux_get);
|
|
|
|
int msm_gpiomux_put(unsigned gpio)
|
|
{
|
|
struct msm_gpiomux_config *cfg = msm_gpiomux_configs + gpio;
|
|
unsigned long irq_flags;
|
|
|
|
if (gpio >= GPIOMUX_NGPIOS)
|
|
return -EINVAL;
|
|
|
|
spin_lock_irqsave(&gpiomux_lock, irq_flags);
|
|
BUG_ON(cfg->ref == 0);
|
|
if (--cfg->ref == 0 && cfg->suspended & GPIOMUX_VALID)
|
|
__msm_gpiomux_write(gpio, cfg->suspended);
|
|
spin_unlock_irqrestore(&gpiomux_lock, irq_flags);
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(msm_gpiomux_put);
|
|
|
|
static int __init gpiomux_init(void)
|
|
{
|
|
unsigned n;
|
|
|
|
for (n = 0; n < GPIOMUX_NGPIOS; ++n) {
|
|
msm_gpiomux_configs[n].ref = 0;
|
|
if (!(msm_gpiomux_configs[n].suspended & GPIOMUX_VALID))
|
|
continue;
|
|
__msm_gpiomux_write(n, msm_gpiomux_configs[n].suspended);
|
|
}
|
|
return 0;
|
|
}
|
|
postcore_initcall(gpiomux_init);
|