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authorBruce E. Robertson <bruce.e.robertson@intel.com>2012-02-06 10:59:01 -0500
committerAnton Vorontsov <anton.vorontsov@linaro.org>2012-03-26 12:41:01 -0400
commited1a230f96eb4610f1f4296b8c3c067389ddf540 (patch)
tree42653c8122379507f3441b046dd85c6adff4c09f /include/linux/power/smb347-charger.h
parentd2c0077c54794d668b3639079a4262a52088d5e2 (diff)
Add I2C driver for Summit Microelectronics SMB347 Battery Charger.
Driver support for the Summit I²C battery charger. This is used in some Intel devices. Signed-off-by: Bruce E. Robertson <bruce.e.robertson@intel.com> Signed-off-by: Alan Cox <alan@linux.intel.com> Signed-off-by: Anton Vorontsov <anton.vorontsov@linaro.org>
Diffstat (limited to 'include/linux/power/smb347-charger.h')
-rw-r--r--include/linux/power/smb347-charger.h117
1 files changed, 117 insertions, 0 deletions
diff --git a/include/linux/power/smb347-charger.h b/include/linux/power/smb347-charger.h
new file mode 100644
index 000000000000..b3cb20dab55f
--- /dev/null
+++ b/include/linux/power/smb347-charger.h
@@ -0,0 +1,117 @@
1/*
2 * Summit Microelectronics SMB347 Battery Charger Driver
3 *
4 * Copyright (C) 2011, Intel Corporation
5 *
6 * Authors: Bruce E. Robertson <bruce.e.robertson@intel.com>
7 * Mika Westerberg <mika.westerberg@linux.intel.com>
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2 as
11 * published by the Free Software Foundation.
12 */
13
14#ifndef SMB347_CHARGER_H
15#define SMB347_CHARGER_H
16
17#include <linux/types.h>
18#include <linux/power_supply.h>
19
20enum {
21 /* use the default compensation method */
22 SMB347_SOFT_TEMP_COMPENSATE_DEFAULT = -1,
23
24 SMB347_SOFT_TEMP_COMPENSATE_NONE,
25 SMB347_SOFT_TEMP_COMPENSATE_CURRENT,
26 SMB347_SOFT_TEMP_COMPENSATE_VOLTAGE,
27};
28
29/* Use default factory programmed value for hard/soft temperature limit */
30#define SMB347_TEMP_USE_DEFAULT -273
31
32/*
33 * Charging enable can be controlled by software (via i2c) by
34 * smb347-charger driver or by EN pin (active low/high).
35 */
36enum smb347_chg_enable {
37 SMB347_CHG_ENABLE_SW,
38 SMB347_CHG_ENABLE_PIN_ACTIVE_LOW,
39 SMB347_CHG_ENABLE_PIN_ACTIVE_HIGH,
40};
41
42/**
43 * struct smb347_charger_platform_data - platform data for SMB347 charger
44 * @battery_info: Information about the battery
45 * @max_charge_current: maximum current (in uA) the battery can be charged
46 * @max_charge_voltage: maximum voltage (in uV) the battery can be charged
47 * @pre_charge_current: current (in uA) to use in pre-charging phase
48 * @termination_current: current (in uA) used to determine when the
49 * charging cycle terminates
50 * @pre_to_fast_voltage: voltage (in uV) treshold used for transitioning to
51 * pre-charge to fast charge mode
52 * @mains_current_limit: maximum input current drawn from AC/DC input (in uA)
53 * @usb_hc_current_limit: maximum input high current (in uA) drawn from USB
54 * input
55 * @chip_temp_threshold: die temperature where device starts limiting charge
56 * current [%100 - %130] (in degree C)
57 * @soft_cold_temp_limit: soft cold temperature limit [%0 - %15] (in degree C),
58 * granularity is 5 deg C.
59 * @soft_hot_temp_limit: soft hot temperature limit [%40 - %55] (in degree C),
60 * granularity is 5 deg C.
61 * @hard_cold_temp_limit: hard cold temperature limit [%-5 - %10] (in degree C),
62 * granularity is 5 deg C.
63 * @hard_hot_temp_limit: hard hot temperature limit [%50 - %65] (in degree C),
64 * granularity is 5 deg C.
65 * @suspend_on_hard_temp_limit: suspend charging when hard limit is hit
66 * @soft_temp_limit_compensation: compensation method when soft temperature
67 * limit is hit
68 * @charge_current_compensation: current (in uA) for charging compensation
69 * current when temperature hits soft limits
70 * @use_mains: AC/DC input can be used
71 * @use_usb: USB input can be used
72 * @use_usb_otg: USB OTG output can be used (not implemented yet)
73 * @irq_gpio: GPIO number used for interrupts (%-1 if not used)
74 * @enable_control: how charging enable/disable is controlled
75 * (driver/pin controls)
76 *
77 * @use_main, @use_usb, and @use_usb_otg are means to enable/disable
78 * hardware support for these. This is useful when we want to have for
79 * example OTG charging controlled via OTG transceiver driver and not by
80 * the SMB347 hardware.
81 *
82 * Hard and soft temperature limit values are given as described in the
83 * device data sheet and assuming NTC beta value is %3750. Even if this is
84 * not the case, these values should be used. They can be mapped to the
85 * corresponding NTC beta values with the help of table %2 in the data
86 * sheet. So for example if NTC beta is %3375 and we want to program hard
87 * hot limit to be %53 deg C, @hard_hot_temp_limit should be set to %50.
88 *
89 * If zero value is given in any of the current and voltage values, the
90 * factory programmed default will be used. For soft/hard temperature
91 * values, pass in %SMB347_TEMP_USE_DEFAULT instead.
92 */
93struct smb347_charger_platform_data {
94 struct power_supply_info battery_info;
95 unsigned int max_charge_current;
96 unsigned int max_charge_voltage;
97 unsigned int pre_charge_current;
98 unsigned int termination_current;
99 unsigned int pre_to_fast_voltage;
100 unsigned int mains_current_limit;
101 unsigned int usb_hc_current_limit;
102 unsigned int chip_temp_threshold;
103 int soft_cold_temp_limit;
104 int soft_hot_temp_limit;
105 int hard_cold_temp_limit;
106 int hard_hot_temp_limit;
107 bool suspend_on_hard_temp_limit;
108 unsigned int soft_temp_limit_compensation;
109 unsigned int charge_current_compensation;
110 bool use_mains;
111 bool use_usb;
112 bool use_usb_otg;
113 int irq_gpio;
114 enum smb347_chg_enable enable_control;
115};
116
117#endif /* SMB347_CHARGER_H */
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