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Merge branch 'hwmon-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jdelvare/staging 

Pull hwmon fixes and updates from Jean Delvare:
 "All lm90 driver fixes and improvements"

* 'hwmon-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jdelvare/staging:
  Documentation: dt: hwmon: Add OF document for LM90
  hwmon: (lm90) Add power control
  hwmon: (lm90) Add support for TI TMP451
  hwmon: (lm90) Use enums for the indexes of temp8 and temp11
  hwmon: (lm90) Add support to handle IRQ
  hwmon: (lm90) Define status bits
  hwmon: (lm90) Fix max6696 alarm handling
hifive-unleashed-5.1
Linus Torvalds 2013-11-15 16:35:10 -08:00
parent f412f2c60b aae7bce481
commit 16cd9d1c0f
4 changed files with 281 additions and 97 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

44
Documentation/devicetree/bindings/hwmon/lm90.txt 100644
View File

@ -0,0 +1,44 @@
* LM90 series thermometer.
Required node properties:
- compatible: manufacturer and chip name, one of
"adi,adm1032"
"adi,adt7461"
"adi,adt7461a"
"gmt,g781"
"national,lm90"
"national,lm86"
"national,lm89"
"national,lm99"
"dallas,max6646"
"dallas,max6647"
"dallas,max6649"
"dallas,max6657"
"dallas,max6658"
"dallas,max6659"
"dallas,max6680"
"dallas,max6681"
"dallas,max6695"
"dallas,max6696"
"onnn,nct1008"
"winbond,w83l771"
"nxp,sa56004"
- reg: I2C bus address of the device
- vcc-supply: vcc regulator for the supply voltage.
Optional properties:
- interrupts: Contains a single interrupt specifier which describes the
LM90 "-ALERT" pin output.
See interrupt-controller/interrupts.txt for the format.
Example LM90 node:
temp-sensor {
compatible = "onnn,nct1008";
reg = <0x4c>;
vcc-supply = <&palmas_ldo6_reg>;
interrupt-parent = <&gpio>;
interrupts = <TEGRA_GPIO(O, 4) IRQ_TYPE_LEVEL_LOW>;
}

6
Documentation/hwmon/lm90
View File

@ -122,6 +122,12 @@ Supported chips:
Prefix: 'g781'
Addresses scanned: I2C 0x4c, 0x4d
Datasheet: Not publicly available from GMT
* Texas Instruments TMP451
Prefix: 'tmp451'
Addresses scanned: I2C 0x4c
Datasheet: Publicly available at TI website
http://www.ti.com/litv/pdf/sbos686
Author: Jean Delvare <khali@linux-fr.org>

1
MAINTAINERS
View File

@ -5215,6 +5215,7 @@ M: Jean Delvare <khali@linux-fr.org>
L: lm-sensors@lm-sensors.org
S: Maintained
F: Documentation/hwmon/lm90
F: Documentation/devicetree/bindings/hwmon/lm90.txt
F: drivers/hwmon/lm90.c
LM95234 HARDWARE MONITOR DRIVER

327
drivers/hwmon/lm90.c
View File

@ -60,6 +60,11 @@
* This driver also supports the G781 from GMT. This device is compatible
* with the ADM1032.
*
* This driver also supports TMP451 from Texas Instruments. This device is
* supported in both compatibility and extended mode. It's mostly compatible
* with ADT7461 except for local temperature low byte register and max
* conversion rate.
*
* Since the LM90 was the first chipset supported by this driver, most
* comments will refer to this chipset, but are actually general and
* concern all supported chipsets, unless mentioned otherwise.
@ -89,6 +94,8 @@
#include <linux/err.h>
#include <linux/mutex.h>
#include <linux/sysfs.h>
#include <linux/interrupt.h>
#include <linux/regulator/consumer.h>
/*
* Addresses to scan
@ -110,7 +117,7 @@ static const unsigned short normal_i2c[] = {
0x4d, 0x4e, 0x4f, I2C_CLIENT_END };
enum chips { lm90, adm1032, lm99, lm86, max6657, max6659, adt7461, max6680,
max6646, w83l771, max6696, sa56004, g781 };
max6646, w83l771, max6696, sa56004, g781, tmp451 };
/*
* The LM90 registers
@ -167,6 +174,9 @@ enum chips { lm90, adm1032, lm99, lm86, max6657, max6659, adt7461, max6680,
#define LM90_DEF_CONVRATE_RVAL 6 /* Def conversion rate register value */
#define LM90_MAX_CONVRATE_MS 16000 /* Maximum conversion rate in ms */
/* TMP451 registers */
#define TMP451_REG_R_LOCAL_TEMPL 0x15
/*
* Device flags
*/
@ -179,6 +189,23 @@ enum chips { lm90, adm1032, lm99, lm86, max6657, max6659, adt7461, max6680,
#define LM90_HAVE_TEMP3 (1 << 6) /* 3rd temperature sensor */
#define LM90_HAVE_BROKEN_ALERT (1 << 7) /* Broken alert */
/* LM90 status */
#define LM90_STATUS_LTHRM (1 << 0) /* local THERM limit tripped */
#define LM90_STATUS_RTHRM (1 << 1) /* remote THERM limit tripped */
#define LM90_STATUS_ROPEN (1 << 2) /* remote is an open circuit */
#define LM90_STATUS_RLOW (1 << 3) /* remote low temp limit tripped */
#define LM90_STATUS_RHIGH (1 << 4) /* remote high temp limit tripped */
#define LM90_STATUS_LLOW (1 << 5) /* local low temp limit tripped */
#define LM90_STATUS_LHIGH (1 << 6) /* local high temp limit tripped */
#define MAX6696_STATUS2_R2THRM (1 << 1) /* remote2 THERM limit tripped */
#define MAX6696_STATUS2_R2OPEN (1 << 2) /* remote2 is an open circuit */
#define MAX6696_STATUS2_R2LOW (1 << 3) /* remote2 low temp limit tripped */
#define MAX6696_STATUS2_R2HIGH (1 << 4) /* remote2 high temp limit tripped */
#define MAX6696_STATUS2_ROT2 (1 << 5) /* remote emergency limit tripped */
#define MAX6696_STATUS2_R2OT2 (1 << 6) /* remote2 emergency limit tripped */
#define MAX6696_STATUS2_LOT2 (1 << 7) /* local emergency limit tripped */
/*
* Driver data (common to all clients)
*/
@ -205,6 +232,7 @@ static const struct i2c_device_id lm90_id[] = {
{ "nct1008", adt7461 },
{ "w83l771", w83l771 },
{ "sa56004", sa56004 },
{ "tmp451", tmp451 },
{ }
};
MODULE_DEVICE_TABLE(i2c, lm90_id);
@ -278,7 +306,7 @@ static const struct lm90_params lm90_params[] = {
[max6696] = {
.flags = LM90_HAVE_EMERGENCY
| LM90_HAVE_EMERGENCY_ALARM | LM90_HAVE_TEMP3,
.alert_alarms = 0x187c,
.alert_alarms = 0x1c7c,
.max_convrate = 6,
.reg_local_ext = MAX6657_REG_R_LOCAL_TEMPL,
},
@ -293,6 +321,43 @@ static const struct lm90_params lm90_params[] = {
.max_convrate = 9,
.reg_local_ext = SA56004_REG_R_LOCAL_TEMPL,
},
[tmp451] = {
.flags = LM90_HAVE_OFFSET | LM90_HAVE_REM_LIMIT_EXT
| LM90_HAVE_BROKEN_ALERT,
.alert_alarms = 0x7c,
.max_convrate = 9,
.reg_local_ext = TMP451_REG_R_LOCAL_TEMPL,
}
};
/*
* TEMP8 register index
*/
enum lm90_temp8_reg_index {
LOCAL_LOW = 0,
LOCAL_HIGH,
LOCAL_CRIT,
REMOTE_CRIT,
LOCAL_EMERG, /* max6659 and max6695/96 */
REMOTE_EMERG, /* max6659 and max6695/96 */
REMOTE2_CRIT, /* max6695/96 only */
REMOTE2_EMERG, /* max6695/96 only */
TEMP8_REG_NUM
};
/*
* TEMP11 register index
*/
enum lm90_temp11_reg_index {
REMOTE_TEMP = 0,
REMOTE_LOW,
REMOTE_HIGH,
REMOTE_OFFSET, /* except max6646, max6657/58/59, and max6695/96 */
LOCAL_TEMP,
REMOTE2_TEMP, /* max6695/96 only */
REMOTE2_LOW, /* max6695/96 only */
REMOTE2_HIGH, /* max6695/96 only */
TEMP11_REG_NUM
};
/*
@ -302,6 +367,7 @@ static const struct lm90_params lm90_params[] = {
struct lm90_data {
struct device *hwmon_dev;
struct mutex update_lock;
struct regulator *regulator;
char valid; /* zero until following fields are valid */
unsigned long last_updated; /* in jiffies */
int kind;
@ -317,25 +383,8 @@ struct lm90_data {
u8 reg_local_ext; /* local extension register offset */
/* registers values */
s8 temp8[8]; /* 0: local low limit
* 1: local high limit
* 2: local critical limit
* 3: remote critical limit
* 4: local emergency limit (max6659 and max6695/96)
* 5: remote emergency limit (max6659 and max6695/96)
* 6: remote 2 critical limit (max6695/96 only)
* 7: remote 2 emergency limit (max6695/96 only)
*/
s16 temp11[8]; /* 0: remote input
* 1: remote low limit
* 2: remote high limit
* 3: remote offset (except max6646, max6657/58/59,
* and max6695/96)
* 4: local input
* 5: remote 2 input (max6695/96 only)
* 6: remote 2 low limit (max6695/96 only)
* 7: remote 2 high limit (max6695/96 only)
*/
s8 temp8[TEMP8_REG_NUM];
s16 temp11[TEMP11_REG_NUM];
u8 temp_hyst;
u16 alarms; /* bitvector (upper 8 bits for max6695/96) */
};
@ -477,37 +526,42 @@ static struct lm90_data *lm90_update_device(struct device *dev)
u8 alarms;
dev_dbg(&client->dev, "Updating lm90 data.\n");
lm90_read_reg(client, LM90_REG_R_LOCAL_LOW, &data->temp8[0]);
lm90_read_reg(client, LM90_REG_R_LOCAL_HIGH, &data->temp8[1]);
lm90_read_reg(client, LM90_REG_R_LOCAL_CRIT, &data->temp8[2]);
lm90_read_reg(client, LM90_REG_R_REMOTE_CRIT, &data->temp8[3]);
lm90_read_reg(client, LM90_REG_R_LOCAL_LOW,
&data->temp8[LOCAL_LOW]);
lm90_read_reg(client, LM90_REG_R_LOCAL_HIGH,
&data->temp8[LOCAL_HIGH]);
lm90_read_reg(client, LM90_REG_R_LOCAL_CRIT,
&data->temp8[LOCAL_CRIT]);
lm90_read_reg(client, LM90_REG_R_REMOTE_CRIT,
&data->temp8[REMOTE_CRIT]);
lm90_read_reg(client, LM90_REG_R_TCRIT_HYST, &data->temp_hyst);
if (data->reg_local_ext) {
lm90_read16(client, LM90_REG_R_LOCAL_TEMP,
data->reg_local_ext,
&data->temp11[4]);
&data->temp11[LOCAL_TEMP]);
} else {
if (lm90_read_reg(client, LM90_REG_R_LOCAL_TEMP,
&h) == 0)
data->temp11[4] = h << 8;
data->temp11[LOCAL_TEMP] = h << 8;
}
lm90_read16(client, LM90_REG_R_REMOTE_TEMPH,
LM90_REG_R_REMOTE_TEMPL, &data->temp11[0]);
LM90_REG_R_REMOTE_TEMPL,
&data->temp11[REMOTE_TEMP]);
if (lm90_read_reg(client, LM90_REG_R_REMOTE_LOWH, &h) == 0) {
data->temp11[1] = h << 8;
data->temp11[REMOTE_LOW] = h << 8;
if ((data->flags & LM90_HAVE_REM_LIMIT_EXT)
&& lm90_read_reg(client, LM90_REG_R_REMOTE_LOWL,
&l) == 0)
data->temp11[1] |= l;
data->temp11[REMOTE_LOW] |= l;
}
if (lm90_read_reg(client, LM90_REG_R_REMOTE_HIGHH, &h) == 0) {
data->temp11[2] = h << 8;
data->temp11[REMOTE_HIGH] = h << 8;
if ((data->flags & LM90_HAVE_REM_LIMIT_EXT)
&& lm90_read_reg(client, LM90_REG_R_REMOTE_HIGHL,
&l) == 0)
data->temp11[2] |= l;
data->temp11[REMOTE_HIGH] |= l;
}
if (data->flags & LM90_HAVE_OFFSET) {
@ -515,13 +569,13 @@ static struct lm90_data *lm90_update_device(struct device *dev)
&h) == 0
&& lm90_read_reg(client, LM90_REG_R_REMOTE_OFFSL,
&l) == 0)
data->temp11[3] = (h << 8) | l;
data->temp11[REMOTE_OFFSET] = (h << 8) | l;
}
if (data->flags & LM90_HAVE_EMERGENCY) {
lm90_read_reg(client, MAX6659_REG_R_LOCAL_EMERG,
&data->temp8[4]);
&data->temp8[LOCAL_EMERG]);
lm90_read_reg(client, MAX6659_REG_R_REMOTE_EMERG,
&data->temp8[5]);
&data->temp8[REMOTE_EMERG]);
}
lm90_read_reg(client, LM90_REG_R_STATUS, &alarms);
data->alarms = alarms; /* save as 16 bit value */
@ -529,15 +583,16 @@ static struct lm90_data *lm90_update_device(struct device *dev)
if (data->kind == max6696) {
lm90_select_remote_channel(client, data, 1);
lm90_read_reg(client, LM90_REG_R_REMOTE_CRIT,
&data->temp8[6]);
&data->temp8[REMOTE2_CRIT]);
lm90_read_reg(client, MAX6659_REG_R_REMOTE_EMERG,
&data->temp8[7]);
&data->temp8[REMOTE2_EMERG]);
lm90_read16(client, LM90_REG_R_REMOTE_TEMPH,
LM90_REG_R_REMOTE_TEMPL, &data->temp11[5]);
LM90_REG_R_REMOTE_TEMPL,
&data->temp11[REMOTE2_TEMP]);
if (!lm90_read_reg(client, LM90_REG_R_REMOTE_LOWH, &h))
data->temp11[6] = h << 8;
data->temp11[REMOTE2_LOW] = h << 8;
if (!lm90_read_reg(client, LM90_REG_R_REMOTE_HIGHH, &h))
data->temp11[7] = h << 8;
data->temp11[REMOTE2_HIGH] = h << 8;
lm90_select_remote_channel(client, data, 0);
if (!lm90_read_reg(client, MAX6696_REG_R_STATUS2,
@ -709,7 +764,7 @@ static ssize_t show_temp8(struct device *dev, struct device_attribute *devattr,
struct lm90_data *data = lm90_update_device(dev);
int temp;
if (data->kind == adt7461)
if (data->kind == adt7461 || data->kind == tmp451)
temp = temp_from_u8_adt7461(data, data->temp8[attr->index]);
else if (data->kind == max6646)
temp = temp_from_u8(data->temp8[attr->index]);
@ -726,7 +781,7 @@ static ssize_t show_temp8(struct device *dev, struct device_attribute *devattr,
static ssize_t set_temp8(struct device *dev, struct device_attribute *devattr,
const char *buf, size_t count)
{
static const u8 reg[8] = {
static const u8 reg[TEMP8_REG_NUM] = {
LM90_REG_W_LOCAL_LOW,
LM90_REG_W_LOCAL_HIGH,
LM90_REG_W_LOCAL_CRIT,
@ -753,7 +808,7 @@ static ssize_t set_temp8(struct device *dev, struct device_attribute *devattr,
val -= 16000;
mutex_lock(&data->update_lock);
if (data->kind == adt7461)
if (data->kind == adt7461 || data->kind == tmp451)
data->temp8[nr] = temp_to_u8_adt7461(data, val);
else if (data->kind == max6646)
data->temp8[nr] = temp_to_u8(val);
@ -775,7 +830,7 @@ static ssize_t show_temp11(struct device *dev, struct device_attribute *devattr,
struct lm90_data *data = lm90_update_device(dev);
int temp;
if (data->kind == adt7461)
if (data->kind == adt7461 || data->kind == tmp451)
temp = temp_from_u16_adt7461(data, data->temp11[attr->index]);
else if (data->kind == max6646)
temp = temp_from_u16(data->temp11[attr->index]);
@ -821,7 +876,7 @@ static ssize_t set_temp11(struct device *dev, struct device_attribute *devattr,
val -= 16000;
mutex_lock(&data->update_lock);
if (data->kind == adt7461)
if (data->kind == adt7461 || data->kind == tmp451)
data->temp11[index] = temp_to_u16_adt7461(data, val);
else if (data->kind == max6646)
data->temp11[index] = temp_to_u8(val) << 8;
@ -850,7 +905,7 @@ static ssize_t show_temphyst(struct device *dev,
struct lm90_data *data = lm90_update_device(dev);
int temp;
if (data->kind == adt7461)
if (data->kind == adt7461 || data->kind == tmp451)
temp = temp_from_u8_adt7461(data, data->temp8[attr->index]);
else if (data->kind == max6646)
temp = temp_from_u8(data->temp8[attr->index]);
@ -878,12 +933,12 @@ static ssize_t set_temphyst(struct device *dev, struct device_attribute *dummy,
return err;
mutex_lock(&data->update_lock);
if (data->kind == adt7461)
temp = temp_from_u8_adt7461(data, data->temp8[2]);
if (data->kind == adt7461 || data->kind == tmp451)
temp = temp_from_u8_adt7461(data, data->temp8[LOCAL_CRIT]);
else if (data->kind == max6646)
temp = temp_from_u8(data->temp8[2]);
temp = temp_from_u8(data->temp8[LOCAL_CRIT]);
else
temp = temp_from_s8(data->temp8[2]);
temp = temp_from_s8(data->temp8[LOCAL_CRIT]);
data->temp_hyst = hyst_to_reg(temp - val);
i2c_smbus_write_byte_data(client, LM90_REG_W_TCRIT_HYST,
@ -937,25 +992,28 @@ static ssize_t set_update_interval(struct device *dev,
return count;
}
static SENSOR_DEVICE_ATTR_2(temp1_input, S_IRUGO, show_temp11, NULL, 0, 4);
static SENSOR_DEVICE_ATTR_2(temp2_input, S_IRUGO, show_temp11, NULL, 0, 0);
static SENSOR_DEVICE_ATTR_2(temp1_input, S_IRUGO, show_temp11, NULL,
0, LOCAL_TEMP);
static SENSOR_DEVICE_ATTR_2(temp2_input, S_IRUGO, show_temp11, NULL,
0, REMOTE_TEMP);
static SENSOR_DEVICE_ATTR(temp1_min, S_IWUSR | S_IRUGO, show_temp8,
set_temp8, 0);
set_temp8, LOCAL_LOW);
static SENSOR_DEVICE_ATTR_2(temp2_min, S_IWUSR | S_IRUGO, show_temp11,
set_temp11, 0, 1);
set_temp11, 0, REMOTE_LOW);
static SENSOR_DEVICE_ATTR(temp1_max, S_IWUSR | S_IRUGO, show_temp8,
set_temp8, 1);
set_temp8, LOCAL_HIGH);
static SENSOR_DEVICE_ATTR_2(temp2_max, S_IWUSR | S_IRUGO, show_temp11,
set_temp11, 1, 2);
set_temp11, 1, REMOTE_HIGH);
static SENSOR_DEVICE_ATTR(temp1_crit, S_IWUSR | S_IRUGO, show_temp8,
set_temp8, 2);
set_temp8, LOCAL_CRIT);
static SENSOR_DEVICE_ATTR(temp2_crit, S_IWUSR | S_IRUGO, show_temp8,
set_temp8, 3);
set_temp8, REMOTE_CRIT);
static SENSOR_DEVICE_ATTR(temp1_crit_hyst, S_IWUSR | S_IRUGO, show_temphyst,
set_temphyst, 2);
static SENSOR_DEVICE_ATTR(temp2_crit_hyst, S_IRUGO, show_temphyst, NULL, 3);
set_temphyst, LOCAL_CRIT);
static SENSOR_DEVICE_ATTR(temp2_crit_hyst, S_IRUGO, show_temphyst, NULL,
REMOTE_CRIT);
static SENSOR_DEVICE_ATTR_2(temp2_offset, S_IWUSR | S_IRUGO, show_temp11,
set_temp11, 2, 3);
set_temp11, 2, REMOTE_OFFSET);
/* Individual alarm files */
static SENSOR_DEVICE_ATTR(temp1_crit_alarm, S_IRUGO, show_alarm, NULL, 0);
@ -1003,13 +1061,13 @@ static const struct attribute_group lm90_group = {
* Additional attributes for devices with emergency sensors
*/
static SENSOR_DEVICE_ATTR(temp1_emergency, S_IWUSR | S_IRUGO, show_temp8,
set_temp8, 4);
set_temp8, LOCAL_EMERG);
static SENSOR_DEVICE_ATTR(temp2_emergency, S_IWUSR | S_IRUGO, show_temp8,
set_temp8, 5);
set_temp8, REMOTE_EMERG);
static SENSOR_DEVICE_ATTR(temp1_emergency_hyst, S_IRUGO, show_temphyst,
NULL, 4);
NULL, LOCAL_EMERG);
static SENSOR_DEVICE_ATTR(temp2_emergency_hyst, S_IRUGO, show_temphyst,
NULL, 5);
NULL, REMOTE_EMERG);
static struct attribute *lm90_emergency_attributes[] = {
&sensor_dev_attr_temp1_emergency.dev_attr.attr,
@ -1039,18 +1097,20 @@ static const struct attribute_group lm90_emergency_alarm_group = {
/*
* Additional attributes for devices with 3 temperature sensors
*/
static SENSOR_DEVICE_ATTR_2(temp3_input, S_IRUGO, show_temp11, NULL, 0, 5);
static SENSOR_DEVICE_ATTR_2(temp3_input, S_IRUGO, show_temp11, NULL,
0, REMOTE2_TEMP);
static SENSOR_DEVICE_ATTR_2(temp3_min, S_IWUSR | S_IRUGO, show_temp11,
set_temp11, 3, 6);
set_temp11, 3, REMOTE2_LOW);
static SENSOR_DEVICE_ATTR_2(temp3_max, S_IWUSR | S_IRUGO, show_temp11,
set_temp11, 4, 7);
set_temp11, 4, REMOTE2_HIGH);
static SENSOR_DEVICE_ATTR(temp3_crit, S_IWUSR | S_IRUGO, show_temp8,
set_temp8, 6);
static SENSOR_DEVICE_ATTR(temp3_crit_hyst, S_IRUGO, show_temphyst, NULL, 6);
set_temp8, REMOTE2_CRIT);
static SENSOR_DEVICE_ATTR(temp3_crit_hyst, S_IRUGO, show_temphyst, NULL,
REMOTE2_CRIT);
static SENSOR_DEVICE_ATTR(temp3_emergency, S_IWUSR | S_IRUGO, show_temp8,
set_temp8, 7);
set_temp8, REMOTE2_EMERG);
static SENSOR_DEVICE_ATTR(temp3_emergency_hyst, S_IRUGO, show_temphyst,
NULL, 7);
NULL, REMOTE2_EMERG);
static SENSOR_DEVICE_ATTR(temp3_crit_alarm, S_IRUGO, show_alarm, NULL, 9);
static SENSOR_DEVICE_ATTR(temp3_fault, S_IRUGO, show_alarm, NULL, 10);
@ -1306,6 +1366,19 @@ static int lm90_detect(struct i2c_client *client,
&& (config1 & 0x3F) == 0x00
&& convrate <= 0x08)
name = "g781";
} else
if (address == 0x4C
&& man_id == 0x55) { /* Texas Instruments */
int local_ext;
local_ext = i2c_smbus_read_byte_data(client,
TMP451_REG_R_LOCAL_TEMPL);
if (chip_id == 0x00 /* TMP451 */
&& (config1 & 0x1B) == 0x00
&& convrate <= 0x09
&& (local_ext & 0x0F) == 0x00)
name = "tmp451";
}
if (!name) { /* identification failed */
@ -1367,7 +1440,7 @@ static void lm90_init_client(struct i2c_client *client)
data->config_orig = config;
/* Check Temperature Range Select */
if (data->kind == adt7461) {
if (data->kind == adt7461 || data->kind == tmp451) {
if (config & 0x04)
data->flags |= LM90_FLAG_ADT7461_EXT;
}
@ -1391,14 +1464,74 @@ static void lm90_init_client(struct i2c_client *client)
i2c_smbus_write_byte_data(client, LM90_REG_W_CONFIG1, config);
}
static bool lm90_is_tripped(struct i2c_client *client, u16 *status)
{
struct lm90_data *data = i2c_get_clientdata(client);
u8 st, st2 = 0;
lm90_read_reg(client, LM90_REG_R_STATUS, &st);
if (data->kind == max6696)
lm90_read_reg(client, MAX6696_REG_R_STATUS2, &st2);
*status = st | (st2 << 8);
if ((st & 0x7f) == 0 && (st2 & 0xfe) == 0)
return false;
if ((st & (LM90_STATUS_LLOW | LM90_STATUS_LHIGH | LM90_STATUS_LTHRM)) ||
(st2 & MAX6696_STATUS2_LOT2))
dev_warn(&client->dev,
"temp%d out of range, please check!\n", 1);
if ((st & (LM90_STATUS_RLOW | LM90_STATUS_RHIGH | LM90_STATUS_RTHRM)) ||
(st2 & MAX6696_STATUS2_ROT2))
dev_warn(&client->dev,
"temp%d out of range, please check!\n", 2);
if (st & LM90_STATUS_ROPEN)
dev_warn(&client->dev,
"temp%d diode open, please check!\n", 2);
if (st2 & (MAX6696_STATUS2_R2LOW | MAX6696_STATUS2_R2HIGH |
MAX6696_STATUS2_R2THRM | MAX6696_STATUS2_R2OT2))
dev_warn(&client->dev,
"temp%d out of range, please check!\n", 3);
if (st2 & MAX6696_STATUS2_R2OPEN)
dev_warn(&client->dev,
"temp%d diode open, please check!\n", 3);
return true;
}
static irqreturn_t lm90_irq_thread(int irq, void *dev_id)
{
struct i2c_client *client = dev_id;
u16 status;
if (lm90_is_tripped(client, &status))
return IRQ_HANDLED;
else
return IRQ_NONE;
}
static int lm90_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
struct device *dev = &client->dev;
struct i2c_adapter *adapter = to_i2c_adapter(dev->parent);
struct lm90_data *data;
struct regulator *regulator;
int err;
regulator = devm_regulator_get(dev, "vcc");
if (IS_ERR(regulator))
return PTR_ERR(regulator);
err = regulator_enable(regulator);
if (err < 0) {
dev_err(&client->dev,
"Failed to enable regulator: %d\n", err);
return err;
}
data = devm_kzalloc(&client->dev, sizeof(struct lm90_data), GFP_KERNEL);
if (!data)
return -ENOMEM;
@ -1406,6 +1539,8 @@ static int lm90_probe(struct i2c_client *client,
i2c_set_clientdata(client, data);
mutex_init(&data->update_lock);
data->regulator = regulator;
/* Set the device type */
data->kind = id->driver_data;
if (data->kind == adm1032) {
@ -1467,12 +1602,26 @@ static int lm90_probe(struct i2c_client *client,
goto exit_remove_files;
}
if (client->irq) {
dev_dbg(dev, "IRQ: %d\n", client->irq);
err = devm_request_threaded_irq(dev, client->irq,
NULL, lm90_irq_thread,
IRQF_TRIGGER_LOW | IRQF_ONESHOT,
"lm90", client);
if (err < 0) {
dev_err(dev, "cannot request IRQ %d\n", client->irq);
goto exit_remove_files;
}
}
return 0;
exit_remove_files:
lm90_remove_files(client, data);
exit_restore:
lm90_restore_conf(client, data);
regulator_disable(data->regulator);
return err;
}
@ -1483,49 +1632,33 @@ static int lm90_remove(struct i2c_client *client)
hwmon_device_unregister(data->hwmon_dev);
lm90_remove_files(client, data);
lm90_restore_conf(client, data);
regulator_disable(data->regulator);
return 0;
}
static void lm90_alert(struct i2c_client *client, unsigned int flag)
{
struct lm90_data *data = i2c_get_clientdata(client);
u8 config, alarms, alarms2 = 0;
lm90_read_reg(client, LM90_REG_R_STATUS, &alarms);
if (data->kind == max6696)
lm90_read_reg(client, MAX6696_REG_R_STATUS2, &alarms2);
if ((alarms & 0x7f) == 0 && (alarms2 & 0xfe) == 0) {
dev_info(&client->dev, "Everything OK\n");
} else {
if (alarms & 0x61)
dev_warn(&client->dev,
"temp%d out of range, please check!\n", 1);
if (alarms & 0x1a)
dev_warn(&client->dev,
"temp%d out of range, please check!\n", 2);
if (alarms & 0x04)
dev_warn(&client->dev,
"temp%d diode open, please check!\n", 2);
if (alarms2 & 0x18)
dev_warn(&client->dev,
"temp%d out of range, please check!\n", 3);
u16 alarms;
if (lm90_is_tripped(client, &alarms)) {
/*
* Disable ALERT# output, because these chips don't implement
* SMBus alert correctly; they should only hold the alert line
* low briefly.
*/
struct lm90_data *data = i2c_get_clientdata(client);
if ((data->flags & LM90_HAVE_BROKEN_ALERT)
&& (alarms & data->alert_alarms)) {
u8 config;
dev_dbg(&client->dev, "Disabling ALERT#\n");
lm90_read_reg(client, LM90_REG_R_CONFIG1, &config);
i2c_smbus_write_byte_data(client, LM90_REG_W_CONFIG1,
config | 0x80);
}
} else {
dev_info(&client->dev, "Everything OK\n");
}
}