diff options
Diffstat (limited to 'drivers/hwmon/lm70.c')
| -rw-r--r-- | drivers/hwmon/lm70.c | 26 |
1 files changed, 19 insertions, 7 deletions
diff --git a/drivers/hwmon/lm70.c b/drivers/hwmon/lm70.c index d2a60de5b8de..0d5a250cb672 100644 --- a/drivers/hwmon/lm70.c +++ b/drivers/hwmon/lm70.c @@ -6,9 +6,9 @@ * Copyright (C) 2006 Kaiwan N Billimoria <kaiwan@designergraphix.com> * * The LM70 communicates with a host processor via an SPI/Microwire Bus - * interface. The complete datasheet is available at National's website + * interface. The complete datasheet is available at TI's website * here: - * http://www.national.com/pf/LM/LM70.html + * https://www.ti.com/product/LM70 */ #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt @@ -34,6 +34,7 @@ #define LM70_CHIP_LM71 2 /* NS LM71 */ #define LM70_CHIP_LM74 3 /* NS LM74 */ #define LM70_CHIP_TMP122 4 /* TI TMP122/TMP124 */ +#define LM70_CHIP_TMP125 5 /* TI TMP125 */ struct lm70 { struct spi_device *spi; @@ -87,6 +88,12 @@ static ssize_t temp1_input_show(struct device *dev, * LM71: * 14 bits of 2's complement data, discard LSB 2 bits, * resolution 0.0312 degrees celsius. + * + * TMP125: + * MSB/D15 is a leading zero. D14 is the sign-bit. This is + * followed by 9 temperature bits (D13..D5) in 2's complement + * data format with a resolution of 0.25 degrees celsius per unit. + * LSB 5 bits (D4..D0) share the same value as D5 and get discarded. */ switch (p_lm70->chip) { case LM70_CHIP_LM70: @@ -102,6 +109,10 @@ static ssize_t temp1_input_show(struct device *dev, case LM70_CHIP_LM71: val = ((int)raw / 4) * 3125 / 100; break; + + case LM70_CHIP_TMP125: + val = (sign_extend32(raw, 14) / 32) * 250; + break; } status = sprintf(buf, "%d\n", val); /* millidegrees Celsius */ @@ -136,6 +147,10 @@ static const struct of_device_id lm70_of_ids[] = { .data = (void *) LM70_CHIP_TMP122, }, { + .compatible = "ti,tmp125", + .data = (void *) LM70_CHIP_TMP125, + }, + { .compatible = "ti,lm71", .data = (void *) LM70_CHIP_LM71, }, @@ -154,11 +169,7 @@ static int lm70_probe(struct spi_device *spi) struct lm70 *p_lm70; int chip; - if (dev_fwnode(&spi->dev)) - chip = (int)(uintptr_t)device_get_match_data(&spi->dev); - else - chip = spi_get_device_id(spi)->driver_data; - + chip = (kernel_ulong_t)spi_get_device_match_data(spi); /* signaling is SPI_MODE_0 */ if ((spi->mode & SPI_MODE_X_MASK) != SPI_MODE_0) @@ -184,6 +195,7 @@ static const struct spi_device_id lm70_ids[] = { { "lm70", LM70_CHIP_LM70 }, { "tmp121", LM70_CHIP_TMP121 }, { "tmp122", LM70_CHIP_TMP122 }, + { "tmp125", LM70_CHIP_TMP125 }, { "lm71", LM70_CHIP_LM71 }, { "lm74", LM70_CHIP_LM74 }, { }, |