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authorPaul Mundt <lethal@linux-sh.org>2008-07-29 08:01:19 -0400
committerPaul Mundt <lethal@linux-sh.org>2008-07-29 08:01:19 -0400
commitda2014a2b080e7f3024a4eb6917d47069ad9620b (patch)
treecfde12c6d4b5baa222966b14a676f107992cf786 /arch/sh/boards/mach-hp6xx/hp6xx_apm.c
parent71b8064e7df5698520d73b4c1566a3dbc98eb9ef (diff)
sh: Shuffle the board directories in to mach groups.
This flattens out the board directories in to individual mach groups, we will use this for getting rid of unneeded directories, simplifying the build system, and becoming more coherent with the refactored arch/sh/include topology. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
Diffstat (limited to 'arch/sh/boards/mach-hp6xx/hp6xx_apm.c')
-rw-r--r--arch/sh/boards/mach-hp6xx/hp6xx_apm.c111
1 files changed, 111 insertions, 0 deletions
diff --git a/arch/sh/boards/mach-hp6xx/hp6xx_apm.c b/arch/sh/boards/mach-hp6xx/hp6xx_apm.c
new file mode 100644
index 000000000000..177f4f028e0d
--- /dev/null
+++ b/arch/sh/boards/mach-hp6xx/hp6xx_apm.c
@@ -0,0 +1,111 @@
1/*
2 * bios-less APM driver for hp680
3 *
4 * Copyright 2005 (c) Andriy Skulysh <askulysh@gmail.com>
5 * Copyright 2008 (c) Kristoffer Ericson <kristoffer.ericson@gmail.com>
6 *
7 * This program is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU General Public License.
9 */
10#include <linux/module.h>
11#include <linux/kernel.h>
12#include <linux/init.h>
13#include <linux/interrupt.h>
14#include <linux/apm-emulation.h>
15#include <linux/io.h>
16#include <asm/adc.h>
17#include <asm/hp6xx.h>
18
19/* percentage values */
20#define APM_CRITICAL 10
21#define APM_LOW 30
22
23/* resonably sane values */
24#define HP680_BATTERY_MAX 898
25#define HP680_BATTERY_MIN 486
26#define HP680_BATTERY_AC_ON 1023
27
28#define MODNAME "hp6x0_apm"
29
30#define PGDR 0xa400012c
31
32static void hp6x0_apm_get_power_status(struct apm_power_info *info)
33{
34 int battery, backup, charging, percentage;
35 u8 pgdr;
36
37 battery = adc_single(ADC_CHANNEL_BATTERY);
38 backup = adc_single(ADC_CHANNEL_BACKUP);
39 charging = adc_single(ADC_CHANNEL_CHARGE);
40
41 percentage = 100 * (battery - HP680_BATTERY_MIN) /
42 (HP680_BATTERY_MAX - HP680_BATTERY_MIN);
43
44 /* % of full battery */
45 info->battery_life = percentage;
46
47 /* We want our estimates in minutes */
48 info->units = 0;
49
50 /* Extremely(!!) rough estimate, we will replace this with a datalist later on */
51 info->time = (2 * battery);
52
53 info->ac_line_status = (battery > HP680_BATTERY_AC_ON) ?
54 APM_AC_ONLINE : APM_AC_OFFLINE;
55
56 pgdr = ctrl_inb(PGDR);
57 if (pgdr & PGDR_MAIN_BATTERY_OUT) {
58 info->battery_status = APM_BATTERY_STATUS_NOT_PRESENT;
59 info->battery_flag = 0x80;
60 } else if (charging < 8) {
61 info->battery_status = APM_BATTERY_STATUS_CHARGING;
62 info->battery_flag = 0x08;
63 info->ac_line_status = 0x01;
64 } else if (percentage <= APM_CRITICAL) {
65 info->battery_status = APM_BATTERY_STATUS_CRITICAL;
66 info->battery_flag = 0x04;
67 } else if (percentage <= APM_LOW) {
68 info->battery_status = APM_BATTERY_STATUS_LOW;
69 info->battery_flag = 0x02;
70 } else {
71 info->battery_status = APM_BATTERY_STATUS_HIGH;
72 info->battery_flag = 0x01;
73 }
74}
75
76static irqreturn_t hp6x0_apm_interrupt(int irq, void *dev)
77{
78 if (!APM_DISABLED)
79 apm_queue_event(APM_USER_SUSPEND);
80
81 return IRQ_HANDLED;
82}
83
84static int __init hp6x0_apm_init(void)
85{
86 int ret;
87
88 ret = request_irq(HP680_BTN_IRQ, hp6x0_apm_interrupt,
89 IRQF_DISABLED, MODNAME, NULL);
90 if (unlikely(ret < 0)) {
91 printk(KERN_ERR MODNAME ": IRQ %d request failed\n",
92 HP680_BTN_IRQ);
93 return ret;
94 }
95
96 apm_get_power_status = hp6x0_apm_get_power_status;
97
98 return ret;
99}
100
101static void __exit hp6x0_apm_exit(void)
102{
103 free_irq(HP680_BTN_IRQ, 0);
104}
105
106module_init(hp6x0_apm_init);
107module_exit(hp6x0_apm_exit);
108
109MODULE_AUTHOR("Adriy Skulysh");
110MODULE_DESCRIPTION("hp6xx Advanced Power Management");
111MODULE_LICENSE("GPL");