linux-kernel - [PATCH] thermal/drivers/rockchip: add missing rk3328 mapping entry

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Message-ID: <20250207164740.14475-1-twoerner@gmail.com>
Date: Fri,  7 Feb 2025 11:47:40 -0500
From: Trevor Woerner <twoerner@...il.com>
To: linux-kernel@...r.kernel.org,
	"Rafael J. Wysocki" <rafael@...nel.org>,
	Daniel Lezcano <daniel.lezcano@...aro.org>,
	Zhang Rui <rui.zhang@...el.com>,
	Lukasz Luba <lukasz.luba@....com>,
	Heiko Stuebner <heiko@...ech.de>,
	linux-pm@...r.kernel.org (open list:THERMAL),
	linux-arm-kernel@...ts.infradead.org (moderated list:ARM/Rockchip SoC support),
	linux-rockchip@...ts.infradead.org (open list:ARM/Rockchip SoC support)
Subject: [PATCH] thermal/drivers/rockchip: add missing rk3328 mapping entry

The mapping table for the rk3328 is missing the entry for -25°C which is
found in the TRM[1] §9.5.2 "Temperature-to-code mapping".

NOTE: the kernel uses the tsadc_q_sel=1'b1 mode which is defined as:
      4096-<code in table>. Whereas the table in the TRM gives the code
      "3774" for -25°C, the kernel uses 4096-3774=322.

Link: https://opensource.rock-chips.com/images/9/97/Rockchip_RK3328TRM_V1.1-Part1-20170321.pdf
Signed-off-by: Trevor Woerner <twoerner@...il.com>
---
 drivers/thermal/rockchip_thermal.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/thermal/rockchip_thermal.c b/drivers/thermal/rockchip_thermal.c
index f551df48eef9..a8ad85feb68f 100644
--- a/drivers/thermal/rockchip_thermal.c
+++ b/drivers/thermal/rockchip_thermal.c
@@ -386,6 +386,7 @@ static const struct tsadc_table rk3328_code_table[] = {
 	{296, -40000},
 	{304, -35000},
 	{313, -30000},
+	{322, -25000},
 	{331, -20000},
 	{340, -15000},
 	{349, -10000},
-- 
2.44.0.501.g19981daefd7c