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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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191dc74bad
SDM845 uses v2 of the TSENS IP block but the get_temp() function appears to be identical across v2.x.y in code seen so far. We use the generic get_temp() function defined as part of ops_generic_v2. Signed-off-by: Amit Kucheria <amit.kucheria@linaro.org> Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org> Tested-by: Matthias Kaehlcke <mka@chromium.org> Reviewed-by: Douglas Anderson <dianders@chromium.org> Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
81 lines
1.9 KiB
C
81 lines
1.9 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* Copyright (c) 2015, The Linux Foundation. All rights reserved.
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* Copyright (c) 2018, Linaro Limited
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*/
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#include <linux/regmap.h>
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#include "tsens.h"
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#define STATUS_OFFSET 0xa0
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#define LAST_TEMP_MASK 0xfff
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#define STATUS_VALID_BIT BIT(21)
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#define CODE_SIGN_BIT BIT(11)
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static int get_temp_tsens_v2(struct tsens_device *tmdev, int id, int *temp)
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{
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struct tsens_sensor *s = &tmdev->sensor[id];
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u32 code;
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unsigned int sensor_addr;
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int last_temp = 0, last_temp2 = 0, last_temp3 = 0, ret;
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sensor_addr = tmdev->tm_offset + STATUS_OFFSET + s->hw_id * 4;
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ret = regmap_read(tmdev->map, sensor_addr, &code);
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if (ret)
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return ret;
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last_temp = code & LAST_TEMP_MASK;
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if (code & STATUS_VALID_BIT)
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goto done;
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/* Try a second time */
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ret = regmap_read(tmdev->map, sensor_addr, &code);
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if (ret)
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return ret;
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if (code & STATUS_VALID_BIT) {
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last_temp = code & LAST_TEMP_MASK;
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goto done;
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} else {
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last_temp2 = code & LAST_TEMP_MASK;
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}
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/* Try a third/last time */
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ret = regmap_read(tmdev->map, sensor_addr, &code);
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if (ret)
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return ret;
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if (code & STATUS_VALID_BIT) {
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last_temp = code & LAST_TEMP_MASK;
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goto done;
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} else {
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last_temp3 = code & LAST_TEMP_MASK;
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}
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if (last_temp == last_temp2)
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last_temp = last_temp2;
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else if (last_temp2 == last_temp3)
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last_temp = last_temp3;
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done:
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/* Code sign bit is the sign extension for a negative value */
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if (last_temp & CODE_SIGN_BIT)
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last_temp |= ~CODE_SIGN_BIT;
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/* Temperatures are in deciCelicius */
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*temp = last_temp * 100;
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return 0;
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}
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static const struct tsens_ops ops_generic_v2 = {
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.init = init_common,
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.get_temp = get_temp_tsens_v2,
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};
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const struct tsens_data data_tsens_v2 = {
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.ops = &ops_generic_v2,
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};
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/* Kept around for backward compatibility with old msm8996.dtsi */
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const struct tsens_data data_8996 = {
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.num_sensors = 13,
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.ops = &ops_generic_v2,
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};
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