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c36de2e73a
Backport almost 50 commits from upstream Linux to improve thermal drivers for MediaTek SoCs and add new LVTS driver for MT7988. Signed-off-by: Daniel Golle <daniel@makrotopia.org>
199 lines
6.7 KiB
Diff
199 lines
6.7 KiB
Diff
From 26cc18a3d6d9eac21c4f4b4bb96147b2c6617c86 Mon Sep 17 00:00:00 2001
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From: Frank Wunderlich <frank-w@public-files.de>
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Date: Fri, 22 Sep 2023 07:50:19 +0200
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Subject: [PATCH 36/42] thermal/drivers/mediatek/lvts_thermal: Make coeff
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configurable
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The upcoming mt7988 has different temperature coefficients so we
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cannot use constants in the functions lvts_golden_temp_init,
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lvts_golden_temp_init and lvts_raw_to_temp anymore.
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Add a field in the lvts_ctrl pointing to the lvts_data which now
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contains the soc-specific temperature coefficents.
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To make the code better readable, rename static int coeff_b to
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golden_temp_offset, COEFF_A to temp_factor and COEFF_B to temp_offset.
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Signed-off-by: Frank Wunderlich <frank-w@public-files.de>
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Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
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Tested-by: Daniel Golle <daniel@makrotopia.org>
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Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
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Link: https://lore.kernel.org/r/20230922055020.6436-4-linux@fw-web.de
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---
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drivers/thermal/mediatek/lvts_thermal.c | 51 ++++++++++++++++---------
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1 file changed, 34 insertions(+), 17 deletions(-)
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--- a/drivers/thermal/mediatek/lvts_thermal.c
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+++ b/drivers/thermal/mediatek/lvts_thermal.c
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@@ -80,8 +80,8 @@
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#define LVTS_SENSOR_MAX 4
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#define LVTS_GOLDEN_TEMP_MAX 62
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#define LVTS_GOLDEN_TEMP_DEFAULT 50
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-#define LVTS_COEFF_A -250460
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-#define LVTS_COEFF_B 250460
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+#define LVTS_COEFF_A_MT8195 -250460
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+#define LVTS_COEFF_B_MT8195 250460
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#define LVTS_MSR_IMMEDIATE_MODE 0
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#define LVTS_MSR_FILTERED_MODE 1
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@@ -94,7 +94,7 @@
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#define LVTS_MINIMUM_THRESHOLD 20000
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static int golden_temp = LVTS_GOLDEN_TEMP_DEFAULT;
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-static int coeff_b = LVTS_COEFF_B;
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+static int golden_temp_offset;
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struct lvts_sensor_data {
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int dt_id;
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@@ -112,6 +112,8 @@ struct lvts_ctrl_data {
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struct lvts_data {
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const struct lvts_ctrl_data *lvts_ctrl;
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int num_lvts_ctrl;
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+ int temp_factor;
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+ int temp_offset;
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};
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struct lvts_sensor {
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@@ -126,6 +128,7 @@ struct lvts_sensor {
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struct lvts_ctrl {
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struct lvts_sensor sensors[LVTS_SENSOR_MAX];
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+ const struct lvts_data *lvts_data;
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u32 calibration[LVTS_SENSOR_MAX];
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u32 hw_tshut_raw_temp;
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int num_lvts_sensor;
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@@ -247,21 +250,21 @@ static void lvts_debugfs_exit(struct lvt
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#endif
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-static int lvts_raw_to_temp(u32 raw_temp)
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+static int lvts_raw_to_temp(u32 raw_temp, int temp_factor)
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{
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int temperature;
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- temperature = ((s64)(raw_temp & 0xFFFF) * LVTS_COEFF_A) >> 14;
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- temperature += coeff_b;
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+ temperature = ((s64)(raw_temp & 0xFFFF) * temp_factor) >> 14;
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+ temperature += golden_temp_offset;
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return temperature;
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}
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-static u32 lvts_temp_to_raw(int temperature)
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+static u32 lvts_temp_to_raw(int temperature, int temp_factor)
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{
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- u32 raw_temp = ((s64)(coeff_b - temperature)) << 14;
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+ u32 raw_temp = ((s64)(golden_temp_offset - temperature)) << 14;
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- raw_temp = div_s64(raw_temp, -LVTS_COEFF_A);
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+ raw_temp = div_s64(raw_temp, -temp_factor);
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return raw_temp;
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}
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@@ -269,6 +272,9 @@ static u32 lvts_temp_to_raw(int temperat
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static int lvts_get_temp(struct thermal_zone_device *tz, int *temp)
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{
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struct lvts_sensor *lvts_sensor = thermal_zone_device_priv(tz);
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+ struct lvts_ctrl *lvts_ctrl = container_of(lvts_sensor, struct lvts_ctrl,
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+ sensors[lvts_sensor->id]);
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+ const struct lvts_data *lvts_data = lvts_ctrl->lvts_data;
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void __iomem *msr = lvts_sensor->msr;
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u32 value;
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int rc;
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@@ -301,7 +307,7 @@ static int lvts_get_temp(struct thermal_
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if (rc)
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return -EAGAIN;
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- *temp = lvts_raw_to_temp(value & 0xFFFF);
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+ *temp = lvts_raw_to_temp(value & 0xFFFF, lvts_data->temp_factor);
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return 0;
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}
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@@ -348,10 +354,13 @@ static bool lvts_should_update_thresh(st
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static int lvts_set_trips(struct thermal_zone_device *tz, int low, int high)
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{
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struct lvts_sensor *lvts_sensor = thermal_zone_device_priv(tz);
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- struct lvts_ctrl *lvts_ctrl = container_of(lvts_sensor, struct lvts_ctrl, sensors[lvts_sensor->id]);
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+ struct lvts_ctrl *lvts_ctrl = container_of(lvts_sensor, struct lvts_ctrl,
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+ sensors[lvts_sensor->id]);
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+ const struct lvts_data *lvts_data = lvts_ctrl->lvts_data;
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void __iomem *base = lvts_sensor->base;
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- u32 raw_low = lvts_temp_to_raw(low != -INT_MAX ? low : LVTS_MINIMUM_THRESHOLD);
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- u32 raw_high = lvts_temp_to_raw(high);
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+ u32 raw_low = lvts_temp_to_raw(low != -INT_MAX ? low : LVTS_MINIMUM_THRESHOLD,
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+ lvts_data->temp_factor);
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+ u32 raw_high = lvts_temp_to_raw(high, lvts_data->temp_factor);
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bool should_update_thresh;
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lvts_sensor->low_thresh = low;
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@@ -692,7 +701,7 @@ static int lvts_calibration_read(struct
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return 0;
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}
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-static int lvts_golden_temp_init(struct device *dev, u32 *value)
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+static int lvts_golden_temp_init(struct device *dev, u32 *value, int temp_offset)
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{
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u32 gt;
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@@ -701,7 +710,7 @@ static int lvts_golden_temp_init(struct
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if (gt && gt < LVTS_GOLDEN_TEMP_MAX)
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golden_temp = gt;
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- coeff_b = golden_temp * 500 + LVTS_COEFF_B;
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+ golden_temp_offset = golden_temp * 500 + temp_offset;
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return 0;
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}
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@@ -724,7 +733,7 @@ static int lvts_ctrl_init(struct device
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* The golden temp information is contained in the first chunk
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* of efuse data.
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*/
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- ret = lvts_golden_temp_init(dev, (u32 *)lvts_td->calib);
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+ ret = lvts_golden_temp_init(dev, (u32 *)lvts_td->calib, lvts_data->temp_offset);
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if (ret)
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return ret;
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@@ -735,6 +744,7 @@ static int lvts_ctrl_init(struct device
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for (i = 0; i < lvts_data->num_lvts_ctrl; i++) {
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lvts_ctrl[i].base = lvts_td->base + lvts_data->lvts_ctrl[i].offset;
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+ lvts_ctrl[i].lvts_data = lvts_data;
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ret = lvts_sensor_init(dev, &lvts_ctrl[i],
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&lvts_data->lvts_ctrl[i]);
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@@ -758,7 +768,8 @@ static int lvts_ctrl_init(struct device
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* after initializing the calibration.
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*/
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lvts_ctrl[i].hw_tshut_raw_temp =
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- lvts_temp_to_raw(lvts_data->lvts_ctrl[i].hw_tshut_temp);
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+ lvts_temp_to_raw(lvts_data->lvts_ctrl[i].hw_tshut_temp,
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+ lvts_data->temp_factor);
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lvts_ctrl[i].low_thresh = INT_MIN;
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lvts_ctrl[i].high_thresh = INT_MIN;
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@@ -1223,6 +1234,8 @@ static int lvts_probe(struct platform_de
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if (irq < 0)
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return irq;
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+ golden_temp_offset = lvts_data->temp_offset;
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+
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ret = lvts_domain_init(dev, lvts_td, lvts_data);
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if (ret)
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return dev_err_probe(dev, ret, "Failed to initialize the lvts domain\n");
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@@ -1336,11 +1349,15 @@ static const struct lvts_ctrl_data mt819
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static const struct lvts_data mt8195_lvts_mcu_data = {
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.lvts_ctrl = mt8195_lvts_mcu_data_ctrl,
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.num_lvts_ctrl = ARRAY_SIZE(mt8195_lvts_mcu_data_ctrl),
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+ .temp_factor = LVTS_COEFF_A_MT8195,
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+ .temp_offset = LVTS_COEFF_B_MT8195,
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};
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static const struct lvts_data mt8195_lvts_ap_data = {
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.lvts_ctrl = mt8195_lvts_ap_data_ctrl,
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.num_lvts_ctrl = ARRAY_SIZE(mt8195_lvts_ap_data_ctrl),
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+ .temp_factor = LVTS_COEFF_A_MT8195,
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+ .temp_offset = LVTS_COEFF_B_MT8195,
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};
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static const struct of_device_id lvts_of_match[] = {
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