linux-kernel - Re: [PATCH] thermal: rockchip: shut up GRF warning

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Message-ID: <8402789.eFmWaWnqpD@diego>
Date: Mon, 18 Aug 2025 20:44:15 +0200
From: Heiko Stübner <heiko@...ech.de>
To: "Rafael J. Wysocki" <rafael@...nel.org>,
 Daniel Lezcano <daniel.lezcano@...aro.org>, Zhang Rui <rui.zhang@...el.com>,
 Lukasz Luba <lukasz.luba@....com>,
 Sebastian Reichel <sebastian.reichel@...labora.com>
Cc: linux-pm@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
 linux-rockchip@...ts.infradead.org, linux-kernel@...r.kernel.org,
 kernel@...labora.com, Sebastian Reichel <sebastian.reichel@...labora.com>
Subject: Re: [PATCH] thermal: rockchip: shut up GRF warning

Hi Sebastian,

Am Montag, 18. August 2025, 19:26:15 Mitteleuropäische Sommerzeit schrieb Sebastian Reichel:
> Most of the recent Rockchip devices do not have a GRF associated
> with the tsadc IP. Let's avoid printing a warning on those devices.
> 
> Signed-off-by: Sebastian Reichel <sebastian.reichel@...labora.com>

thanks a lot for tracking down the GRF usage for all the soc variants :-)

> ---
>  drivers/thermal/rockchip_thermal.c | 53 +++++++++++++++++++++++++++++++++-----
>  1 file changed, 46 insertions(+), 7 deletions(-)
> 
> diff --git a/drivers/thermal/rockchip_thermal.c b/drivers/thermal/rockchip_thermal.c
> index 3beff9b6fac3abe8948b56132b618ff1bed57217..1e8091cebd6673ab39fa0c4dee835c68aeb7e8b5 100644
> --- a/drivers/thermal/rockchip_thermal.c
> +++ b/drivers/thermal/rockchip_thermal.c
> @@ -1099,6 +1114,8 @@ static const struct rockchip_tsadc_chip px30_tsadc_data = {
>  	.chn_offset = 0,
>  	.chn_num = 2, /* 2 channels for tsadc */
>  
> +	.grf_mode = GRF_MANDATORY,
> +
>  	.tshut_mode = TSHUT_MODE_CRU, /* default TSHUT via CRU */
>  	.tshut_temp = 95000,
>  
> @@ -1123,6 +1140,8 @@ static const struct rockchip_tsadc_chip rv1108_tsadc_data = {
>  	.chn_offset = 0,
>  	.chn_num = 1, /* one channel for tsadc */
>  
> +	.grf_mode = GRF_NONE,
> +

nit: I guess instead of adding an empty line, you could also just drop
the empty line above, to bring the "older" variants into the form
rk3576 and rk3588 use.


>  	.tshut_mode = TSHUT_MODE_GPIO, /* default TSHUT via GPIO give PMIC */
>  	.tshut_polarity = TSHUT_LOW_ACTIVE, /* default TSHUT LOW ACTIVE */
>  	.tshut_temp = 95000,

[...]

> @@ -1321,6 +1354,7 @@ static const struct rockchip_tsadc_chip rk3576_tsadc_data = {
>  	/* top, big_core, little_core, ddr, npu, gpu */
>  	.chn_offset = 0,
>  	.chn_num = 6, /* six channels for tsadc */
> +	.grf_mode = GRF_NONE,
>  	.tshut_mode = TSHUT_MODE_GPIO, /* default TSHUT via GPIO give PMIC */
>  	.tshut_polarity = TSHUT_LOW_ACTIVE, /* default TSHUT LOW ACTIVE */
>  	.tshut_temp = 95000,
> @@ -1345,6 +1379,7 @@ static const struct rockchip_tsadc_chip rk3588_tsadc_data = {
>  	/* top, big_core0, big_core1, little_core, center, gpu, npu */
>  	.chn_offset = 0,
>  	.chn_num = 7, /* seven channels for tsadc */
> +	.grf_mode = GRF_NONE,
>  	.tshut_mode = TSHUT_MODE_GPIO, /* default TSHUT via GPIO give PMIC */
>  	.tshut_polarity = TSHUT_LOW_ACTIVE, /* default TSHUT LOW ACTIVE */
>  	.tshut_temp = 95000,

[...]

> @@ -1621,12 +1656,16 @@ static int rockchip_configure_from_dt(struct device *dev,
>  		return -EINVAL;
>  	}
>  
> -	/* The tsadc wont to handle the error in here since some SoCs didn't
> -	 * need this property.
> -	 */
> -	thermal->grf = syscon_regmap_lookup_by_phandle(np, "rockchip,grf");
> -	if (IS_ERR(thermal->grf))
> -		dev_warn(dev, "Missing rockchip,grf property\n");
> +	if (thermal->chip->grf_mode != GRF_NONE) {
> +		thermal->grf = syscon_regmap_lookup_by_phandle(np, "rockchip,grf");
> +		if (IS_ERR(thermal->grf)) {
> +			ret = PTR_ERR(thermal->grf);
> +			if (thermal->chip->grf_mode == GRF_OPTIONAL)
> +				dev_warn(dev, "Missing rockchip,grf property\n");

I guess it might make it easier for people seeing the log, if we could
insert an "optional" into that message for the optional tier.

> +			else
> +				return dev_err_probe(dev, ret, "Missing rockchip,grf property\n");
> +		}
> +	}
>  
>  	rockchip_get_trim_configuration(dev, np, thermal);

Overall, though

Reviewed-by: Heiko Stuebner <heiko@...ech.de>


Thanks
Heiko