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SubjectRe: [PATCH v3 10/13] thermal: qoriq: Enable all sensors before registering them
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On 01/04/2019 06:14, Andrey Smirnov wrote:
> 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>
> Cc: Chris Healy <cphealy@gmail.com>
> Cc: Lucas Stach <l.stach@pengutronix.de>
> Cc: Zhang Rui <rui.zhang@intel.com>
> 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
> ---

Acked-by: Daniel Lezcano <daniel.lezcano@linaro.org>

> drivers/thermal/qoriq_thermal.c | 27 ++++++++++++++-------------
> 1 file changed, 14 insertions(+), 13 deletions(-)
>
> diff --git a/drivers/thermal/qoriq_thermal.c b/drivers/thermal/qoriq_thermal.c
> index a909acee4354..7ff93dfcd68b 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
> @@ -75,7 +76,10 @@ 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;
> @@ -85,21 +89,18 @@ static int qoriq_tmu_register_tmu_zone(struct device *dev,
>
> tzd = devm_thermal_zone_of_sensor_register(dev, id,
> s, &tmu_tz_ops);
> - if (IS_ERR(tzd)) {
> - if (PTR_ERR(tzd) == -ENODEV)
> - continue;
> - else
> - return PTR_ERR(tzd);
> + ret = PTR_ERR_OR_ZERO(tzd);
> + switch (ret) {
> + case -ENODEV:
> + continue;
> + case 0:
> + break;
> + default:
> + regmap_write(qdata->regmap, REGS_TMR, TMR_DISABLE);
> + return ret;
> }
> -
> - sites |= 0x1 << (15 - id);
> }
>
> - /* Enable monitoring */
> - if (sites != 0)
> - regmap_write(qdata->regmap, REGS_TMR,
> - sites | TMR_ME | TMR_ALPF);
> -
> return 0;
> }
>
>


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