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hwmon: (lm90) Add support and detection of Philips/NXP NE1618

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NE1618 is similar to NE1617 but supports manufacturer and chip ID
registers as well as 11 bit external temperature resolution.

Signed-off-by: Guenter Roeck <linux@roeck-us.net>
This commit is contained in:
Guenter Roeck 2022-01-06 19:52:36 -08:00
parent f63f6cce28
commit 9a19866370
3 changed files with 42 additions and 14 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

10
Documentation/hwmon/lm90.rst
View File

@ -411,6 +411,14 @@ Supported chips:
Datasheets: Publicly available at the Philips website
* Philips NE1618
Prefix: 'ne1618'
Addresses scanned: I2C 0x18 - 0x1a, 0x29 - 0x2b, 0x4c - 0x4e
Datasheets: Publicly available at the Philips website
* Genesys Logic GL523SM
Prefix: 'gl523sm'
@ -469,7 +477,7 @@ ADM1020, ADM1021, GL523SM, MAX1617, NE1617, NE1617A, THMC10:
* 8 bit sensor resolution
* Low temperature limits
NCT210:
NCT210, NE1618:
* 11 bit sensor resolution for remote temperature sensor
* Low temperature limits

2
drivers/hwmon/Kconfig
View File

@ -1367,7 +1367,7 @@ config SENSORS_LM90
MAX6696,
ON Semiconductor NCT1008, NCT210, NCT72, NCT214, NCT218,
Winbond/Nuvoton W83L771W/G/AWG/ASG,
Philips SA56004, GMT G781, Texas Instruments TMP451 and TMP461
Philips NE1618, SA56004, GMT G781, Texas Instruments TMP451 and TMP461
sensor chips.
This driver can also be built as a module. If so, the module

44
drivers/hwmon/lm90.c
View File

@ -87,6 +87,9 @@
* This driver also supports MAX1617 and various clones such as G767
* and NE1617. Such clones will be detected as MAX1617.
*
* This driver also supports NE1618 from Philips. It is similar to NE1617
* but supports 11 bit external temperature values.
*
* 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.
@ -129,7 +132,7 @@ static const unsigned short normal_i2c[] = {
enum chips { adm1023, adm1032, adt7461, adt7461a, adt7481,
g781, lm84, lm90, lm99,
max1617, max6642, max6646, max6648, max6654, max6657, max6659, max6680, max6696,
nct210, nct72, sa56004, tmp451, tmp461, w83l771,
nct210, nct72, ne1618, sa56004, tmp451, tmp461, w83l771,
};
/*
@ -267,6 +270,7 @@ static const struct i2c_device_id lm90_id[] = {
{ "nct214", nct72 },
{ "nct218", nct72 },
{ "nct72", nct72 },
{ "ne1618", ne1618 },
{ "w83l771", w83l771 },
{ "sa56004", sa56004 },
{ "thmc10", max1617 },
@ -572,6 +576,13 @@ static const struct lm90_params lm90_params[] = {
.resolution = 11,
.max_convrate = 7,
},
[ne1618] = {
.flags = LM90_PAUSE_FOR_CONFIG | LM90_HAVE_BROKEN_ALERT
| LM90_HAVE_LOW | LM90_HAVE_CONVRATE | LM90_HAVE_REMOTE_EXT,
.alert_alarms = 0x7c,
.resolution = 11,
.max_convrate = 7,
},
[w83l771] = {
.flags = LM90_HAVE_OFFSET | LM90_HAVE_REM_LIMIT_EXT | LM90_HAVE_CRIT
| LM90_HAVE_ALARMS | LM90_HAVE_LOW | LM90_HAVE_CONVRATE
@ -2151,20 +2162,29 @@ static const char *lm90_detect_nuvoton(struct i2c_client *client, int chip_id,
return name;
}
static const char *lm90_detect_nxp(struct i2c_client *client, int chip_id,
int config1, int convrate)
static const char *lm90_detect_nxp(struct i2c_client *client, bool common_address,
int chip_id, int config1, int convrate)
{
int config2 = i2c_smbus_read_byte_data(client, LM90_REG_CONFIG2);
int address = client->addr;
const char *name = NULL;
int config2;
if (config2 < 0)
return NULL;
if (address >= 0x48 && address <= 0x4f && chip_id == 0x00 &&
!(config1 & 0x2a) && !(config2 & 0xfe) && convrate <= 0x09)
name = "sa56004";
switch (chip_id) {
case 0x00:
config2 = i2c_smbus_read_byte_data(client, LM90_REG_CONFIG2);
if (config2 < 0)
return NULL;
if (address >= 0x48 && address <= 0x4f &&
!(config1 & 0x2a) && !(config2 & 0xfe) && convrate <= 0x09)
name = "sa56004";
break;
case 0x80:
if (common_address && !(config1 & 0x3f) && convrate <= 0x07)
name = "ne1618";
break;
default:
break;
}
return name;
}
@ -2337,7 +2357,7 @@ static int lm90_detect(struct i2c_client *client, struct i2c_board_info *info)
name = lm90_detect_nuvoton(client, chip_id, config1, convrate);
break;
case 0xa1: /* NXP Semiconductor/Philips */
name = lm90_detect_nxp(client, chip_id, config1, convrate);
name = lm90_detect_nxp(client, common_address, chip_id, config1, convrate);
break;
case 0xff: /* MAX1617, G767, NE1617 */
if (common_address && chip_id == 0xff && convrate < 8)