4783de9bba
Keep track of the success/failure of the last vreg proc comm command, and return that on debugfs reads. Signed-off-by: Steve Muckle <smuckle@quicinc.com>
159 lines
3.1 KiB
C
159 lines
3.1 KiB
C
/* arch/arm/mach-msm/vreg.c
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*
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* Copyright (C) 2008 Google, Inc.
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* Copyright (c) 2009, Code Aurora Forum. All rights reserved.
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* Author: Brian Swetland <swetland@google.com>
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*
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* This software is licensed under the terms of the GNU General Public
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* License version 2, as published by the Free Software Foundation, and
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* may be copied, distributed, and modified under those terms.
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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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*/
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#include <linux/kernel.h>
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#include <linux/device.h>
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#include <linux/init.h>
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#include <linux/debugfs.h>
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#include <mach/vreg.h>
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#include "proc_comm.h"
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struct vreg {
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const char *name;
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unsigned id;
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int status;
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};
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#define VREG(_name, _id, _status) \
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{ .name = _name, .id = _id, .status = _status }
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static struct vreg vregs[] = {
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VREG("msma", 0, 0),
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VREG("msmp", 1, 0),
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VREG("msme1", 2, 0),
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VREG("msmc1", 3, 0),
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VREG("msmc2", 4, 0),
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VREG("gp3", 5, 0),
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VREG("msme2", 6, 0),
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VREG("gp4", 7, 0),
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VREG("gp1", 8, 0),
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VREG("tcxo", 9, 0),
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VREG("pa", 10, 0),
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VREG("rftx", 11, 0),
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VREG("rfrx1", 12, 0),
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VREG("rfrx2", 13, 0),
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VREG("synt", 14, 0),
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VREG("wlan", 15, 0),
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VREG("usb", 16, 0),
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VREG("boost", 17, 0),
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VREG("mmc", 18, 0),
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VREG("ruim", 19, 0),
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VREG("msmc0", 20, 0),
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VREG("gp2", 21, 0),
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VREG("gp5", 22, 0),
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VREG("gp6", 23, 0),
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VREG("rf", 24, 0),
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VREG("rf_vco", 26, 0),
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VREG("mpll", 27, 0),
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VREG("s2", 28, 0),
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VREG("s3", 29, 0),
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VREG("rfubm", 30, 0),
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VREG("ncp", 31, 0),
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};
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struct vreg *vreg_get(struct device *dev, const char *id)
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{
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int n;
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for (n = 0; n < ARRAY_SIZE(vregs); n++) {
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if (!strcmp(vregs[n].name, id))
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return vregs + n;
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}
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return ERR_PTR(-ENOENT);
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}
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void vreg_put(struct vreg *vreg)
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{
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}
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int vreg_enable(struct vreg *vreg)
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{
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unsigned id = vreg->id;
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unsigned enable = 1;
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vreg->status = msm_proc_comm(PCOM_VREG_SWITCH, &id, &enable);
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return vreg->status;
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}
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int vreg_disable(struct vreg *vreg)
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{
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unsigned id = vreg->id;
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unsigned enable = 0;
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vreg->status = msm_proc_comm(PCOM_VREG_SWITCH, &id, &enable);
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return vreg->status;
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}
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int vreg_set_level(struct vreg *vreg, unsigned mv)
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{
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unsigned id = vreg->id;
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vreg->status = msm_proc_comm(PCOM_VREG_SET_LEVEL, &id, &mv);
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return vreg->status;
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}
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#if defined(CONFIG_DEBUG_FS)
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static int vreg_debug_set(void *data, u64 val)
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{
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struct vreg *vreg = data;
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switch (val) {
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case 0:
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vreg_disable(vreg);
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break;
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case 1:
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vreg_enable(vreg);
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break;
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default:
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vreg_set_level(vreg, val);
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break;
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}
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return 0;
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}
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static int vreg_debug_get(void *data, u64 *val)
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{
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struct vreg *vreg = data;
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if (!vreg->status)
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*val = 0;
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else
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*val = 1;
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return 0;
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}
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DEFINE_SIMPLE_ATTRIBUTE(vreg_fops, vreg_debug_get, vreg_debug_set, "%llu\n");
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static int __init vreg_debug_init(void)
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{
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struct dentry *dent;
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int n;
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dent = debugfs_create_dir("vreg", 0);
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if (IS_ERR(dent))
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return 0;
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for (n = 0; n < ARRAY_SIZE(vregs); n++)
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(void) debugfs_create_file(vregs[n].name, 0644,
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dent, vregs + n, &vreg_fops);
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return 0;
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}
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device_initcall(vreg_debug_init);
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#endif
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