Messages in this thread Patch in this message | | | From | Andrey Smirnov <> | Subject | [PATCH v5 09/12] thermal: qoriq: Enable all sensors before registering them | Date | Tue, 23 Apr 2019 23:48:27 -0700 |
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Tmu_get_temp will get called as a part of sensor registration via devm_thermal_zone_of_sensor_register(). To prevent it from retruning bogus data we need to enable sensor monitoring before that. Looking at the datasheet (i.MX8MQ RM) there doesn't seem to be any harm in enabling them all, so, for the sake of simplicity, change the code to do just that.
Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com> Tested-by: Lucas Stach <l.stach@pengutronix.de> Cc: Chris Healy <cphealy@gmail.com> Cc: Lucas Stach <l.stach@pengutronix.de> Cc: Eduardo Valentin <edubezval@gmail.com> Cc: Daniel Lezcano <daniel.lezcano@linaro.org> Cc: Angus Ainslie (Purism) <angus@akkea.ca> Cc: linux-imx@nxp.com Cc: linux-pm@vger.kernel.org Cc: linux-kernel@vger.kernel.org --- drivers/thermal/qoriq_thermal.c | 23 +++++++++++------------ 1 file changed, 11 insertions(+), 12 deletions(-)
diff --git a/drivers/thermal/qoriq_thermal.c b/drivers/thermal/qoriq_thermal.c index 9774323a17bf..d8d9f567a632 100644 --- a/drivers/thermal/qoriq_thermal.c +++ b/drivers/thermal/qoriq_thermal.c @@ -23,6 +23,7 @@ #define TMR_DISABLE 0x0 #define TMR_ME 0x80000000 #define TMR_ALPF 0x0c000000 +#define TMR_MSITE_ALL GENMASK(15, 0) #define REGS_TMTMIR 0x008 /* Temperature measurement interval Register */ #define TMTMIR_DEFAULT 0x0000000f @@ -61,28 +62,26 @@ static const struct thermal_zone_of_device_ops tmu_tz_ops = { static int qoriq_tmu_register_tmu_zone(struct device *dev, struct qoriq_tmu_data *qdata) { - int id, sites = 0; + int id, ret; + + regmap_write(qdata->regmap, REGS_TMR, + TMR_MSITE_ALL | TMR_ME | TMR_ALPF); for (id = 0; id < SITES_MAX; id++) { struct thermal_zone_device *tzd; tzd = devm_thermal_zone_of_sensor_register(dev, id, qdata, &tmu_tz_ops); - if (IS_ERR(tzd)) { - if (PTR_ERR(tzd) == -ENODEV) + ret = PTR_ERR_OR_ZERO(tzd); + if (ret) { + if (ret == -ENODEV) continue; - else - return PTR_ERR(tzd); - } - sites |= 0x1 << (15 - id); + regmap_write(qdata->regmap, REGS_TMR, TMR_DISABLE); + return ret; + } } - /* Enable monitoring */ - if (sites != 0) - regmap_write(qdata->regmap, REGS_TMR, - sites | TMR_ME | TMR_ALPF); - return 0; } -- 2.20.1
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