diff options
Diffstat (limited to 'drivers/thermal/thermal-generic-adc.c')
| -rw-r--r-- | drivers/thermal/thermal-generic-adc.c | 14 |
1 files changed, 7 insertions, 7 deletions
diff --git a/drivers/thermal/thermal-generic-adc.c b/drivers/thermal/thermal-generic-adc.c index e22fc60ad36d..dcecf2e8dc8e 100644 --- a/drivers/thermal/thermal-generic-adc.c +++ b/drivers/thermal/thermal-generic-adc.c @@ -1,13 +1,10 @@ +// SPDX-License-Identifier: GPL-2.0-only /* * Generic ADC thermal driver * * Copyright (C) 2016 NVIDIA CORPORATION. All rights reserved. * * Author: Laxman Dewangan <ldewangan@nvidia.com> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. */ #include <linux/iio/consumer.h> #include <linux/kernel.h> @@ -29,6 +26,9 @@ static int gadc_thermal_adc_to_temp(struct gadc_thermal_info *gti, int val) int temp, temp_hi, temp_lo, adc_hi, adc_lo; int i; + if (!gti->lookup_table) + return val; + for (i = 0; i < gti->nlookup_table; i++) { if (val >= gti->lookup_table[2 * i + 1]) break; @@ -81,9 +81,9 @@ static int gadc_thermal_read_linear_lookup_table(struct device *dev, ntable = of_property_count_elems_of_size(np, "temperature-lookup-table", sizeof(u32)); - if (ntable < 0) { - dev_err(dev, "Lookup table is not provided\n"); - return ntable; + if (ntable <= 0) { + dev_notice(dev, "no lookup table, assuming DAC channel returns milliCelcius\n"); + return 0; } if (ntable % 2) { |