// SPDX-License-Identifier: GPL-2.0 /* * Copyright (c) 2015, The Linux Foundation. All rights reserved. * Copyright (c) 2018, Linaro Limited */ #include <linux/regmap.h> #include <linux/bitops.h> #include "tsens.h" #define STATUS_OFFSET 0xa0 #define LAST_TEMP_MASK 0xfff #define STATUS_VALID_BIT BIT(21) static int get_temp_tsens_v2(struct tsens_device *tmdev, int id, int *temp) { struct tsens_sensor *s = &tmdev->sensor[id]; u32 code; unsigned int status_reg; u32 last_temp = 0, last_temp2 = 0, last_temp3 = 0; int ret; status_reg = tmdev->tm_offset + STATUS_OFFSET + s->hw_id * 4; ret = regmap_read(tmdev->map, status_reg, &code); if (ret) return ret; last_temp = code & LAST_TEMP_MASK; if (code & STATUS_VALID_BIT) goto done; /* Try a second time */ ret = regmap_read(tmdev->map, status_reg, &code); if (ret) return ret; if (code & STATUS_VALID_BIT) { last_temp = code & LAST_TEMP_MASK; goto done; } else { last_temp2 = code & LAST_TEMP_MASK; } /* Try a third/last time */ ret = regmap_read(tmdev->map, status_reg, &code); if (ret) return ret; if (code & STATUS_VALID_BIT) { last_temp = code & LAST_TEMP_MASK; goto done; } else { last_temp3 = code & LAST_TEMP_MASK; } if (last_temp == last_temp2) last_temp = last_temp2; else if (last_temp2 == last_temp3) last_temp = last_temp3; done: /* Convert temperature from deciCelsius to milliCelsius */ *temp = sign_extend32(last_temp, fls(LAST_TEMP_MASK) - 1) * 100; return 0; } static const struct tsens_ops ops_generic_v2 = { .init = init_common, .get_temp = get_temp_tsens_v2, }; const struct tsens_data data_tsens_v2 = { .ops = &ops_generic_v2, }; /* Kept around for backward compatibility with old msm8996.dtsi */ const struct tsens_data data_8996 = { .num_sensors = 13, .ops = &ops_generic_v2, };