aboutsummaryrefslogtreecommitdiffstats
path: root/drivers/hwmon/pmbus
diff options
context:
space:
mode:
authorGuenter Roeck <guenter.roeck@ericsson.com>2011-07-09 16:11:44 -0400
committerGuenter Roeck <guenter.roeck@ericsson.com>2011-07-28 20:09:53 -0400
commit70e94b276c21638a0a37908f6696a6b122944dea (patch)
tree9d017d968a85b4d5313c4f5117bcae042f73555e /drivers/hwmon/pmbus
parent8ebed854506301f4f67e75c73cae967d4a45ab4d (diff)
hwmon: (max8688) Add support for peak attributes
Add support for voltage, current, and temperature peak (historic maximum) attributes. Signed-off-by: Guenter Roeck <guenter.roeck@ericsson.com>
Diffstat (limited to 'drivers/hwmon/pmbus')
-rw-r--r--drivers/hwmon/pmbus/max8688.c61
1 files changed, 61 insertions, 0 deletions
diff --git a/drivers/hwmon/pmbus/max8688.c b/drivers/hwmon/pmbus/max8688.c
index ddc8a64c2ba5..c3e72f1a3cfb 100644
--- a/drivers/hwmon/pmbus/max8688.c
+++ b/drivers/hwmon/pmbus/max8688.c
@@ -25,6 +25,9 @@
25#include <linux/i2c.h> 25#include <linux/i2c.h>
26#include "pmbus.h" 26#include "pmbus.h"
27 27
28#define MAX8688_MFR_VOUT_PEAK 0xd4
29#define MAX8688_MFR_IOUT_PEAK 0xd5
30#define MAX8688_MFR_TEMPERATURE_PEAK 0xd6
28#define MAX8688_MFG_STATUS 0xd8 31#define MAX8688_MFG_STATUS 0xd8
29 32
30#define MAX8688_STATUS_OC_FAULT (1 << 4) 33#define MAX8688_STATUS_OC_FAULT (1 << 4)
@@ -37,6 +40,62 @@
37#define MAX8688_STATUS_OT_FAULT (1 << 13) 40#define MAX8688_STATUS_OT_FAULT (1 << 13)
38#define MAX8688_STATUS_OT_WARNING (1 << 14) 41#define MAX8688_STATUS_OT_WARNING (1 << 14)
39 42
43static int max8688_read_word_data(struct i2c_client *client, int page, int reg)
44{
45 int ret;
46
47 if (page)
48 return -EINVAL;
49
50 switch (reg) {
51 case PMBUS_VIRT_READ_VOUT_MAX:
52 ret = pmbus_read_word_data(client, 0, MAX8688_MFR_VOUT_PEAK);
53 break;
54 case PMBUS_VIRT_READ_IOUT_MAX:
55 ret = pmbus_read_word_data(client, 0, MAX8688_MFR_IOUT_PEAK);
56 break;
57 case PMBUS_VIRT_READ_TEMP_MAX:
58 ret = pmbus_read_word_data(client, 0,
59 MAX8688_MFR_TEMPERATURE_PEAK);
60 break;
61 case PMBUS_VIRT_RESET_VOUT_HISTORY:
62 case PMBUS_VIRT_RESET_IOUT_HISTORY:
63 case PMBUS_VIRT_RESET_TEMP_HISTORY:
64 ret = 0;
65 break;
66 default:
67 ret = -ENODATA;
68 break;
69 }
70 return ret;
71}
72
73static int max8688_write_word_data(struct i2c_client *client, int page, int reg,
74 u16 word)
75{
76 int ret;
77
78 switch (reg) {
79 case PMBUS_VIRT_RESET_VOUT_HISTORY:
80 ret = pmbus_write_word_data(client, 0, MAX8688_MFR_VOUT_PEAK,
81 0);
82 break;
83 case PMBUS_VIRT_RESET_IOUT_HISTORY:
84 ret = pmbus_write_word_data(client, 0, MAX8688_MFR_IOUT_PEAK,
85 0);
86 break;
87 case PMBUS_VIRT_RESET_TEMP_HISTORY:
88 ret = pmbus_write_word_data(client, 0,
89 MAX8688_MFR_TEMPERATURE_PEAK,
90 0xffff);
91 break;
92 default:
93 ret = -ENODATA;
94 break;
95 }
96 return ret;
97}
98
40static int max8688_read_byte_data(struct i2c_client *client, int page, int reg) 99static int max8688_read_byte_data(struct i2c_client *client, int page, int reg)
41{ 100{
42 int ret = 0; 101 int ret = 0;
@@ -111,6 +170,8 @@ static struct pmbus_driver_info max8688_info = {
111 | PMBUS_HAVE_STATUS_VOUT | PMBUS_HAVE_STATUS_IOUT 170 | PMBUS_HAVE_STATUS_VOUT | PMBUS_HAVE_STATUS_IOUT
112 | PMBUS_HAVE_STATUS_TEMP, 171 | PMBUS_HAVE_STATUS_TEMP,
113 .read_byte_data = max8688_read_byte_data, 172 .read_byte_data = max8688_read_byte_data,
173 .read_word_data = max8688_read_word_data,
174 .write_word_data = max8688_write_word_data,
114}; 175};
115 176
116static int max8688_probe(struct i2c_client *client, 177static int max8688_probe(struct i2c_client *client,