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vreg.c

/* arch/arm/mach-msm/vreg.c
 *
 * Copyright (C) 2008 Google, Inc.
 * Author: Brian Swetland <swetland@google.com>
 *
 * This software is licensed under the terms of the GNU General Public
 * License version 2, as published by the Free Software Foundation, and
 * may be copied, distributed, and modified under those terms.
 *
 * 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.
 *
 */

#include <linux/kernel.h>
#include <linux/device.h>
#include <linux/init.h>
#include <linux/debugfs.h>
#include <mach/vreg.h>

#include "proc_comm.h"

struct vreg {
      const char *name;
      unsigned id;
};

#define VREG(_name, _id) { .name = _name, .id = _id, }

static struct vreg vregs[] = {
      VREG("msma",      0),
      VREG("msmp",      1),
      VREG("msme1",     2),
      VREG("msmc1",     3),
      VREG("msmc2",     4),
      VREG("gp3", 5),
      VREG("msme2",     6),
      VREG("gp4", 7),
      VREG("gp1", 8),
      VREG("tcxo",      9),
      VREG("pa",  10),
      VREG("rftx",      11),
      VREG("rfrx1",     12),
      VREG("rfrx2",     13),
      VREG("synt",      14),
      VREG("wlan",      15),
      VREG("usb", 16),
      VREG("boost",     17),
      VREG("mmc", 18),
      VREG("ruim",      19),
      VREG("msmc0",     20),
      VREG("gp2", 21),
      VREG("gp5", 22),
      VREG("gp6", 23),
      VREG("rf",  24),
      VREG("rf_vco",    26),
      VREG("mpll",      27),
      VREG("s2",  28),
      VREG("s3",  29),
      VREG("rfubm",     30),
      VREG("ncp", 31),
};

struct vreg *vreg_get(struct device *dev, const char *id)
{
      int n;
      for (n = 0; n < ARRAY_SIZE(vregs); n++) {
            if (!strcmp(vregs[n].name, id))
                  return vregs + n;
      }
      return 0;
}

void vreg_put(struct vreg *vreg)
{
}

int vreg_enable(struct vreg *vreg)
{
      unsigned id = vreg->id;
      unsigned enable = 1;
      return msm_proc_comm(PCOM_VREG_SWITCH, &id, &enable);
}

void vreg_disable(struct vreg *vreg)
{
      unsigned id = vreg->id;
      unsigned enable = 0;
      msm_proc_comm(PCOM_VREG_SWITCH, &id, &enable);
}

int vreg_set_level(struct vreg *vreg, unsigned mv)
{
      unsigned id = vreg->id;
      return msm_proc_comm(PCOM_VREG_SET_LEVEL, &id, &mv);
}

#if defined(CONFIG_DEBUG_FS)

static int vreg_debug_set(void *data, u64 val)
{
      struct vreg *vreg = data;
      switch (val) {
      case 0:
            vreg_disable(vreg);
            break;
      case 1:
            vreg_enable(vreg);
            break;
      default:
            vreg_set_level(vreg, val);
            break;
      }
      return 0;
}

static int vreg_debug_get(void *data, u64 *val)
{
      return -ENOSYS;
}

DEFINE_SIMPLE_ATTRIBUTE(vreg_fops, vreg_debug_get, vreg_debug_set, "%llu\n");

static int __init vreg_debug_init(void)
{
      struct dentry *dent;
      int n;

      dent = debugfs_create_dir("vreg", 0);
      if (IS_ERR(dent))
            return 0;

      for (n = 0; n < ARRAY_SIZE(vregs); n++)
            (void) debugfs_create_file(vregs[n].name, 0644,
                                 dent, vregs + n, &vreg_fops);

      return 0;
}

device_initcall(vreg_debug_init);
#endif

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