linux-kernel - [PATCH v3 08/16] thermal: sun8i: add TEMP_CALIB_MASK for calibration data in sun50i_h6_ths

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Message-Id: <20200708071942.22595-9-frank@allwinnertech.com>
Date:   Wed,  8 Jul 2020 15:19:34 +0800
From:   Frank Lee <frank@...winnertech.com>
To:     robh+dt@...nel.org, mripard@...nel.org, wens@...e.org,
        mturquette@...libre.com, sboyd@...nel.org,
        gregory.clement@...tlin.com, tglx@...utronix.de,
        jason@...edaemon.net, maz@...nel.org,
        srinivas.kandagatla@...aro.org, linus.walleij@...aro.org,
        anarsoul@...il.com, tiny.windzz@...il.com, rui.zhang@...el.com,
        daniel.lezcano@...aro.org, amit.kucheria@...durent.com,
        lee.jones@...aro.org, p.zabel@...gutronix.de, clabbe@...libre.com,
        icenowy@...c.io, megous@...ous.com, stefan@...mex.com,
        bage@...utronix.de
Cc:     devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org, linux-clk@...r.kernel.org,
        linux-i2c@...r.kernel.org, linux-gpio@...r.kernel.org,
        linux-pm@...r.kernel.org, huangshuosheng@...winnertech.com,
        liyong@...winnertech.com, Frank Lee <frank@...winnertech.com>
Subject: [PATCH v3 08/16] thermal: sun8i: add TEMP_CALIB_MASK for calibration data in sun50i_h6_ths_calibrate

For sun50i_h6_ths_calibrate(), the data read from nvmem needs a round of
calculation. On the other hand, the newer SOC may store other data in
the space other than 12bit sensor data. Add mask operation to read data
to avoid conversion error.

Signed-off-by: Frank Lee <frank@...winnertech.com>
Reviewed-by: Yangtao Li <tiny.windzz@...il.com>
---
 drivers/thermal/sun8i_thermal.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/thermal/sun8i_thermal.c b/drivers/thermal/sun8i_thermal.c
index 74d73be..f423d44 100644
--- a/drivers/thermal/sun8i_thermal.c
+++ b/drivers/thermal/sun8i_thermal.c
@@ -244,7 +244,7 @@ static int sun50i_h6_ths_calibrate(struct ths_device *tmdev,
 	ft_temp = (caldata[0] & FT_TEMP_MASK) * 100;
 
 	for (i = 0; i < tmdev->chip->sensor_num; i++) {
-		int sensor_reg = caldata[i + 1];
+		int sensor_reg = caldata[i + 1] & TEMP_CALIB_MASK;
 		int cdata, offset;
 		int sensor_temp = tmdev->chip->calc_temp(tmdev, i, sensor_reg);
 
-- 
1.9.1