linux-kernel - [PATCH linux-stable 6.12 3/3] thermal/drivers/mediatek/lvts

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Message-ID: <253c49132453481a74fa3ef59f0b85a51bc9d4c6.1756568900.git.daniel@makrotopia.org>
Date: Sat, 30 Aug 2025 16:57:17 +0100
From: Daniel Golle <daniel@...rotopia.org>
To: "Rafael J. Wysocki" <rafael@...nel.org>,
	Daniel Lezcano <daniel.lezcano@...aro.org>,
	Zhang Rui <rui.zhang@...el.com>, Lukasz Luba <lukasz.luba@....com>,
	Matthias Brugger <matthias.bgg@...il.com>,
	AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>,
	Daniel Golle <daniel@...rotopia.org>,
	Nícolas F. R. A. Prado <nfraprado@...labora.com>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Mason Chang <mason-cw.chang@...iatek.com>,
	Arnd Bergmann <arnd@...db.de>,
	Frank Wunderlich <frank-w@...lic-files.de>,
	linux-pm@...r.kernel.org, linux-kernel@...r.kernel.org,
	linux-stable@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
	linux-mediatek@...ts.infradead.org
Cc: Chad Monroe <chad.monroe@...ran.com>
Subject: [PATCH linux-stable 6.12 3/3] thermal/drivers/mediatek/lvts_thermal:
 Add mt7988 lvts commands

From: Mason Chang <mason-cw.chang@...iatek.com>

[ Upstream commit 685a755089f95b7e205c0202567d9a647f9de096 ]

These commands are necessary to avoid severely abnormal and inaccurate
temperature readings that are caused by using the default commands.

Fixes: 585e92e6a79f ("thermal/drivers/mediatek/lvts_thermal: Add mt7988 support")
Signed-off-by: Mason Chang <mason-cw.chang@...iatek.com>
Link: https://lore.kernel.org/r/20250526102659.30225-4-mason-cw.chang@mediatek.com
Signed-off-by: Daniel Lezcano <daniel.lezcano@...aro.org>
Signed-off-by: Daniel Golle <daniel@...rotopia.org>
---
 drivers/thermal/mediatek/lvts_thermal.c | 16 ++++++++++++----
 1 file changed, 12 insertions(+), 4 deletions(-)

diff --git a/drivers/thermal/mediatek/lvts_thermal.c b/drivers/thermal/mediatek/lvts_thermal.c
index 239476152bab..017191b9f864 100644
--- a/drivers/thermal/mediatek/lvts_thermal.c
+++ b/drivers/thermal/mediatek/lvts_thermal.c
@@ -1421,6 +1421,8 @@ static int lvts_resume(struct device *dev)
 }
 
 static const u32 default_conn_cmds[] = { 0xC103FFFF, 0xC502FF55 };
+static const u32 mt7988_conn_cmds[] = { 0xC103FFFF, 0xC502FC55 };
+
 /*
  * Write device mask: 0xC1030000
  */
@@ -1431,6 +1433,12 @@ static const u32 default_init_cmds[] = {
 	0xC10300FC, 0xC103009D, 0xC10300F1, 0xC10300E1
 };
 
+static const u32 mt7988_init_cmds[] = {
+	0xC1030300, 0xC1030420, 0xC1030500, 0xC10307A6, 0xC1030CFC,
+	0xC1030A8C, 0xC103098D, 0xC10308F1, 0xC1030B04, 0xC1030E01,
+	0xC10306B8
+};
+
 /*
  * The MT8186 calibration data is stored as packed 3-byte little-endian
  * values using a weird layout that makes sense only when viewed as a 32-bit
@@ -1725,11 +1733,11 @@ static const struct lvts_ctrl_data mt8195_lvts_ap_data_ctrl[] = {
 
 static const struct lvts_data mt7988_lvts_ap_data = {
 	.lvts_ctrl	= mt7988_lvts_ap_data_ctrl,
-	.conn_cmd	= default_conn_cmds,
-	.init_cmd	= default_init_cmds,
+	.conn_cmd	= mt7988_conn_cmds,
+	.init_cmd	= mt7988_init_cmds,
 	.num_lvts_ctrl	= ARRAY_SIZE(mt7988_lvts_ap_data_ctrl),
-	.num_conn_cmd	= ARRAY_SIZE(default_conn_cmds),
-	.num_init_cmd	= ARRAY_SIZE(default_init_cmds),
+	.num_conn_cmd	= ARRAY_SIZE(mt7988_conn_cmds),
+	.num_init_cmd	= ARRAY_SIZE(mt7988_init_cmds),
 	.temp_factor	= LVTS_COEFF_A_MT7988,
 	.temp_offset	= LVTS_COEFF_B_MT7988,
 	.gt_calib_bit_offset = 24,
-- 
2.51.0