[PATCH 7/9] thermal/drivers/mediatek/lvts: Support MSR offset for 16-bit calibration data
From: Laura Nao <hidden>
Date: 2025-07-21 08:16:27
Also in:
linux-devicetree, linux-mediatek, linux-pm, lkml
Subsystem:
the rest, thermal · Maintainers:
Linus Torvalds, Rafael J. Wysocki, Daniel Lezcano
On MT8196/MT6991, per-sensor calibration data read from eFuses is 16-bit. When the LVTS controller operates in 16-bit mode, a fixed offset must be added to MSR values during post-processing to obtain correct temperature readings. Introduce a new msr_offset field in lvts_data, program the respective register and apply the offset to the calibration data read from eFuses. Signed-off-by: Laura Nao <redacted> --- drivers/thermal/mediatek/lvts_thermal.c | 16 ++++++++++++++++ 1 file changed, 16 insertions(+)
diff --git a/drivers/thermal/mediatek/lvts_thermal.c b/drivers/thermal/mediatek/lvts_thermal.c
index 8f9da0d5b886..81c8309ff9df 100644
--- a/drivers/thermal/mediatek/lvts_thermal.c
+++ b/drivers/thermal/mediatek/lvts_thermal.c@@ -44,6 +44,7 @@ #define LVTS_EDATA01(__base) (__base + 0x0058) #define LVTS_EDATA02(__base) (__base + 0x005C) #define LVTS_EDATA03(__base) (__base + 0x0060) +#define LVTS_MSROFT(__base) (__base + 0x006C) #define LVTS_ATP0(__base) (__base + 0x0070) #define LVTS_ATP1(__base) (__base + 0x0074) #define LVTS_ATP2(__base) (__base + 0x0078)
@@ -144,6 +145,7 @@ struct lvts_data { int temp_offset; int gt_calib_bit_offset; unsigned int def_calibration; + u16 msr_offset; }; struct lvts_sensor {
@@ -212,6 +214,7 @@ static const struct debugfs_reg32 lvts_regs[] = { LVTS_DEBUG_FS_REGS(LVTS_EDATA01), LVTS_DEBUG_FS_REGS(LVTS_EDATA02), LVTS_DEBUG_FS_REGS(LVTS_EDATA03), + LVTS_DEBUG_FS_REGS(LVTS_MSROFT), LVTS_DEBUG_FS_REGS(LVTS_ATP0), LVTS_DEBUG_FS_REGS(LVTS_ATP1), LVTS_DEBUG_FS_REGS(LVTS_ATP2),
@@ -782,6 +785,8 @@ static int lvts_calibration_init(struct device *dev, struct lvts_ctrl *lvts_ctrl if (gt) { lvts_ctrl->calibration[i] = calib; + if (lvts_ctrl->lvts_data->msr_offset) + lvts_ctrl->calibration[i] += lvts_ctrl->lvts_data->msr_offset; } else if (lvts_ctrl->lvts_data->def_calibration) { lvts_ctrl->calibration[i] = lvts_ctrl->lvts_data->def_calibration; } else {
@@ -1096,6 +1101,17 @@ static int lvts_ctrl_calibrate(struct device *dev, struct lvts_ctrl *lvts_ctrl) for (i = 0; i < LVTS_SENSOR_MAX; i++) writel(lvts_ctrl->calibration[i], lvts_edata[i]); + /* LVTS_MSROFT : Constant offset applied to MSR values + * for post-processing + * + * Bits: + * + * 20-0 : Constant data added to MSR values + */ + if (lvts_ctrl->lvts_data->msr_offset) + writel(lvts_ctrl->lvts_data->msr_offset, + LVTS_MSROFT(lvts_ctrl->base)); + return 0; }
--
2.39.5