From 709066acdd12c3312c94ebccc37630932e381949 Mon Sep 17 00:00:00 2001 From: Guenter Roeck Date: Sun, 5 Jul 2015 11:04:56 -0700 Subject: [PATCH] hwmon: (adm1275) Add support for ADM1278 ADM1278 is mostly compatible to other chips of the same series. Besides the usual difference in coefficients, it supports a temperature sensor, and it can measure both input and output voltage at the same time. Signed-off-by: Guenter Roeck --- Documentation/hwmon/adm1275 | 27 +++++++++++++---- drivers/hwmon/pmbus/Kconfig | 4 +-- drivers/hwmon/pmbus/adm1275.c | 56 ++++++++++++++++++++++++++++++++++- 3 files changed, 79 insertions(+), 8 deletions(-) diff --git a/Documentation/hwmon/adm1275 b/Documentation/hwmon/adm1275 index 04e8e4adf4a1..791bc0bd91e6 100644 --- a/Documentation/hwmon/adm1275 +++ b/Documentation/hwmon/adm1275 @@ -14,6 +14,10 @@ Supported chips: Prefix: 'adm1276' Addresses scanned: - Datasheet: www.analog.com/static/imported-files/data_sheets/ADM1276.pdf + * Analog Devices ADM1278 + Prefix: 'adm1278' + Addresses scanned: - + Datasheet: www.analog.com/static/imported-files/data_sheets/ADM1278.pdf * Analog Devices ADM1293/ADM1294 Prefix: 'adm1293', 'adm1294' Addresses scanned: - @@ -26,12 +30,14 @@ Description ----------- This driver supports hardware monitoring for Analog Devices ADM1075, ADM1275, -ADM1276, ADM1293, and ADM1294 Hot-Swap Controller and Digital Power Monitors. +ADM1276, ADM1278, ADM1293, and ADM1294 Hot-Swap Controller and Digital +Power Monitors. -ADM1075, ADM1275, ADM1276, ADM1293, and ADM1294 are hot-swap controllers that -allow a circuit board to be removed from or inserted into a live backplane. -They also feature current and voltage readback via an integrated 12 -bit analog-to-digital converter (ADC), accessed using a PMBus interface. +ADM1075, ADM1275, ADM1276, ADM1278, ADM1293, and ADM1294 are hot-swap +controllers that allow a circuit board to be removed from or inserted into +a live backplane. They also feature current and voltage readback via an +integrated 12 bit analog-to-digital converter (ADC), accessed using a +PMBus interface. The driver is a client driver to the core PMBus driver. Please see Documentation/hwmon/pmbus for details on PMBus client drivers. @@ -96,3 +102,14 @@ power1_reset_history Write any value to reset history. Power attributes are supported on ADM1075, ADM1276, ADM1293, and ADM1294. + +temp1_input Chip temperature. + Temperature attributes are only available on ADM1278. +temp1_max Maximum chip temperature. +temp1_max_alarm Temperature alarm. +temp1_crit Critical chip temperature. +temp1_crit_alarm Critical temperature high alarm. +temp1_highest Highest observed temperature. +temp1_reset_history Write any value to reset history. + + Temperature attributes are supported on ADM1278. diff --git a/drivers/hwmon/pmbus/Kconfig b/drivers/hwmon/pmbus/Kconfig index 7e5cc3d025ef..054d3d863802 100644 --- a/drivers/hwmon/pmbus/Kconfig +++ b/drivers/hwmon/pmbus/Kconfig @@ -31,8 +31,8 @@ config SENSORS_ADM1275 default n help If you say yes here you get hardware monitoring support for Analog - Devices ADM1075, ADM1275, ADM1276, ADM1293, and ADM1294 Hot-Swap - Controller and Digital Power Monitors. + Devices ADM1075, ADM1275, ADM1276, ADM1278, ADM1293, and ADM1294 + Hot-Swap Controller and Digital Power Monitors. This driver can also be built as a module. If so, the module will be called adm1275. diff --git a/drivers/hwmon/pmbus/adm1275.c b/drivers/hwmon/pmbus/adm1275.c index 188af4c89f40..3baa4f4a8c5e 100644 --- a/drivers/hwmon/pmbus/adm1275.c +++ b/drivers/hwmon/pmbus/adm1275.c @@ -24,7 +24,7 @@ #include #include "pmbus.h" -enum chips { adm1075, adm1275, adm1276, adm1293, adm1294 }; +enum chips { adm1075, adm1275, adm1276, adm1278, adm1293, adm1294 }; #define ADM1275_MFR_STATUS_IOUT_WARN2 BIT(0) #define ADM1293_MFR_STATUS_VAUX_UV_WARN BIT(5) @@ -41,6 +41,10 @@ enum chips { adm1075, adm1275, adm1276, adm1293, adm1294 }; #define ADM1075_IRANGE_25 BIT(3) #define ADM1075_IRANGE_MASK (BIT(3) | BIT(4)) +#define ADM1278_TEMP1_EN BIT(3) +#define ADM1278_VIN_EN BIT(2) +#define ADM1278_VOUT_EN BIT(1) + #define ADM1293_IRANGE_25 0 #define ADM1293_IRANGE_50 BIT(6) #define ADM1293_IRANGE_100 BIT(7) @@ -54,6 +58,7 @@ enum chips { adm1075, adm1275, adm1276, adm1293, adm1294 }; #define ADM1293_VAUX_EN BIT(1) +#define ADM1278_PEAK_TEMP 0xd7 #define ADM1275_IOUT_WARN2_LIMIT 0xd7 #define ADM1275_DEVICE_CONFIG 0xd8 @@ -80,6 +85,7 @@ struct adm1275_data { bool have_iout_min; bool have_pin_min; bool have_pin_max; + bool have_temp_max; struct pmbus_driver_info info; }; @@ -113,6 +119,13 @@ static const struct coefficients adm1276_coefficients[] = { [4] = { 2115, 0, -1 }, /* power, vrange not set */ }; +static const struct coefficients adm1278_coefficients[] = { + [0] = { 19599, 0, -2 }, /* voltage */ + [1] = { 800, 20475, -1 }, /* current */ + [2] = { 6123, 0, -2 }, /* power */ + [3] = { 42, 31880, -1 }, /* temperature */ +}; + static const struct coefficients adm1293_coefficients[] = { [0] = { 3333, -1, 0 }, /* voltage, vrange 1.2V */ [1] = { 5552, -5, -1 }, /* voltage, vrange 7.4V */ @@ -196,6 +209,11 @@ static int adm1275_read_word_data(struct i2c_client *client, int page, int reg) return -ENXIO; ret = pmbus_read_word_data(client, 0, ADM1276_PEAK_PIN); break; + case PMBUS_VIRT_READ_TEMP_MAX: + if (!data->have_temp_max) + return -ENXIO; + ret = pmbus_read_word_data(client, 0, ADM1278_PEAK_TEMP); + break; case PMBUS_VIRT_RESET_IOUT_HISTORY: case PMBUS_VIRT_RESET_VOUT_HISTORY: case PMBUS_VIRT_RESET_VIN_HISTORY: @@ -204,6 +222,10 @@ static int adm1275_read_word_data(struct i2c_client *client, int page, int reg) if (!data->have_pin_max) return -ENXIO; break; + case PMBUS_VIRT_RESET_TEMP_HISTORY: + if (!data->have_temp_max) + return -ENXIO; + break; default: ret = -ENODATA; break; @@ -245,6 +267,9 @@ static int adm1275_write_word_data(struct i2c_client *client, int page, int reg, ret = pmbus_write_word_data(client, 0, ADM1293_PIN_MIN, 0); break; + case PMBUS_VIRT_RESET_TEMP_HISTORY: + ret = pmbus_write_word_data(client, 0, ADM1278_PEAK_TEMP, 0); + break; default: ret = -ENODATA; break; @@ -312,6 +337,7 @@ static const struct i2c_device_id adm1275_id[] = { { "adm1075", adm1075 }, { "adm1275", adm1275 }, { "adm1276", adm1276 }, + { "adm1278", adm1278 }, { "adm1293", adm1293 }, { "adm1294", adm1294 }, { } @@ -329,6 +355,7 @@ static int adm1275_probe(struct i2c_client *client, const struct i2c_device_id *mid; const struct coefficients *coefficients; int vindex = -1, voindex = -1, cindex = -1, pindex = -1; + int tindex = -1; if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_READ_BYTE_DATA @@ -386,6 +413,7 @@ static int adm1275_probe(struct i2c_client *client, info->format[PSC_VOLTAGE_OUT] = direct; info->format[PSC_CURRENT_OUT] = direct; info->format[PSC_POWER] = direct; + info->format[PSC_TEMPERATURE] = direct; info->func[0] = PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT; info->read_word_data = adm1275_read_word_data; @@ -460,6 +488,27 @@ static int adm1275_probe(struct i2c_client *client, info->func[0] |= PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT; break; + case adm1278: + data->have_vout = true; + data->have_pin_max = true; + data->have_temp_max = true; + + coefficients = adm1278_coefficients; + vindex = 0; + cindex = 1; + pindex = 2; + tindex = 3; + + info->func[0] |= PMBUS_HAVE_PIN | PMBUS_HAVE_STATUS_INPUT; + if (config & ADM1278_TEMP1_EN) + info->func[0] |= + PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP; + if (config & ADM1278_VIN_EN) + info->func[0] |= PMBUS_HAVE_VIN; + if (config & ADM1278_VOUT_EN) + info->func[0] |= + PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT; + break; case adm1293: case adm1294: data->have_iout_min = true; @@ -537,6 +586,11 @@ static int adm1275_probe(struct i2c_client *client, info->b[PSC_POWER] = coefficients[pindex].b; info->R[PSC_POWER] = coefficients[pindex].R; } + if (tindex >= 0) { + info->m[PSC_TEMPERATURE] = coefficients[tindex].m; + info->b[PSC_TEMPERATURE] = coefficients[tindex].b; + info->R[PSC_TEMPERATURE] = coefficients[tindex].R; + } return pmbus_do_probe(client, id, info); }