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Date: Thu, 1 Feb 2024 22:19:15 -0600
From: Bjorn Andersson <andersson@...nel.org>
To: Konrad Dybcio <konrad.dybcio@...aro.org>
Cc: "Rafael J. Wysocki" <rafael@...nel.org>,
Daniel Lezcano <daniel.lezcano@...aro.org>, Zhang Rui <rui.zhang@...el.com>,
Lukasz Luba <lukasz.luba@....com>, Rob Herring <robh+dt@...nel.org>,
Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>, Conor Dooley <conor+dt@...nel.org>, linux-pm@...r.kernel.org,
devicetree@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2/2] thermal/of: Assume polling-delay(-passive) 0 when
absent
On Thu, Jan 25, 2024 at 01:11:16PM +0100, Konrad Dybcio wrote:
> Currently, thermal zones associated with providers that have interrupts
> for signaling hot/critical trips are required to set a polling-delay
> of 0 to indicate no polling. This feels a bit backwards.
>
> Change the code such that "no polling delay" also means "no polling".
>
> Suggested-by: Bjorn Andersson <andersson@...nel.org>
> Signed-off-by: Konrad Dybcio <konrad.dybcio@...aro.org>
Reviewed-by: Bjorn Andersson <andersson@...nel.org>
Regards,
Bjorn
> ---
> drivers/thermal/thermal_of.c | 12 ++++++++----
> 1 file changed, 8 insertions(+), 4 deletions(-)
>
> diff --git a/drivers/thermal/thermal_of.c b/drivers/thermal/thermal_of.c
> index 4d6c22e0ed85..61bbd42aa2cb 100644
> --- a/drivers/thermal/thermal_of.c
> +++ b/drivers/thermal/thermal_of.c
> @@ -225,14 +225,18 @@ static int thermal_of_monitor_init(struct device_node *np, int *delay, int *pdel
> int ret;
>
> ret = of_property_read_u32(np, "polling-delay-passive", pdelay);
> - if (ret < 0) {
> - pr_err("%pOFn: missing polling-delay-passive property\n", np);
> + if (ret == -EINVAL) {
> + *pdelay = 0;
> + } else if (ret < 0) {
> + pr_err("%pOFn: Couldn't get polling-delay-passive: %d\n", np, ret);
> return ret;
> }
>
> ret = of_property_read_u32(np, "polling-delay", delay);
> - if (ret < 0) {
> - pr_err("%pOFn: missing polling-delay property\n", np);
> + if (ret == -EINVAL) {
> + *delay = 0;
> + } else if (ret < 0) {
> + pr_err("%pOFn: Couldn't get polling-delay: %d\n", np, ret);
> return ret;
> }
>
>
> --
> 2.40.1
>
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