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Date: Wed, 20 Jul 2022 12:27:58 +0200
From: Daniel Lezcano <daniel.lezcano@...aro.org>
To: Robert Marko <robimarko@...il.com>, agross@...nel.org,
bjorn.andersson@...aro.org, konrad.dybcio@...ainline.org,
amitk@...nel.org, thara.gopinath@...il.com, rafael@...nel.org,
rui.zhang@...el.com, robh+dt@...nel.org,
krzysztof.kozlowski+dt@...aro.org, linux-arm-msm@...r.kernel.org,
linux-pm@...r.kernel.org, devicetree@...r.kernel.org,
linux-kernel@...r.kernel.org
Subject: Re: [PATCH v6 2/5] drivers: thermal: tsens: Add support for combined
interrupt
Hi,
On 14/07/2022 12:14, Robert Marko wrote:
> Despite using tsens v2.3 IP, IPQ8074 and IPQ6018 only have one IRQ for
> signaling both up/low and critical trips.
>
> Signed-off-by: Robert Marko <robimarko@...il.com>
Bjorn, are these changes ok for you ?
> ---
> Changes in v6:
> * Check critical IRQ handler return, simplify up/low return
> ---
> drivers/thermal/qcom/tsens-8960.c | 1 +
> drivers/thermal/qcom/tsens-v0_1.c | 1 +
> drivers/thermal/qcom/tsens-v1.c | 1 +
> drivers/thermal/qcom/tsens-v2.c | 1 +
> drivers/thermal/qcom/tsens.c | 38 ++++++++++++++++++++++++++-----
> drivers/thermal/qcom/tsens.h | 2 ++
> 6 files changed, 38 insertions(+), 6 deletions(-)
>
> diff --git a/drivers/thermal/qcom/tsens-8960.c b/drivers/thermal/qcom/tsens-8960.c
> index 67c1748cdf73..ee584e5b07e5 100644
> --- a/drivers/thermal/qcom/tsens-8960.c
> +++ b/drivers/thermal/qcom/tsens-8960.c
> @@ -269,6 +269,7 @@ static const struct tsens_ops ops_8960 = {
> static struct tsens_features tsens_8960_feat = {
> .ver_major = VER_0,
> .crit_int = 0,
> + .combo_int = 0,
> .adc = 1,
> .srot_split = 0,
> .max_sensors = 11,
> diff --git a/drivers/thermal/qcom/tsens-v0_1.c b/drivers/thermal/qcom/tsens-v0_1.c
> index f136cb350238..6effb822bf3c 100644
> --- a/drivers/thermal/qcom/tsens-v0_1.c
> +++ b/drivers/thermal/qcom/tsens-v0_1.c
> @@ -539,6 +539,7 @@ static int calibrate_9607(struct tsens_priv *priv)
> static struct tsens_features tsens_v0_1_feat = {
> .ver_major = VER_0_1,
> .crit_int = 0,
> + .combo_int = 0,
> .adc = 1,
> .srot_split = 1,
> .max_sensors = 11,
> diff --git a/drivers/thermal/qcom/tsens-v1.c b/drivers/thermal/qcom/tsens-v1.c
> index 573e261ccca7..a4f561a6e582 100644
> --- a/drivers/thermal/qcom/tsens-v1.c
> +++ b/drivers/thermal/qcom/tsens-v1.c
> @@ -302,6 +302,7 @@ static int calibrate_8976(struct tsens_priv *priv)
> static struct tsens_features tsens_v1_feat = {
> .ver_major = VER_1_X,
> .crit_int = 0,
> + .combo_int = 0,
> .adc = 1,
> .srot_split = 1,
> .max_sensors = 11,
> diff --git a/drivers/thermal/qcom/tsens-v2.c b/drivers/thermal/qcom/tsens-v2.c
> index b293ed32174b..129cdb247381 100644
> --- a/drivers/thermal/qcom/tsens-v2.c
> +++ b/drivers/thermal/qcom/tsens-v2.c
> @@ -31,6 +31,7 @@
> static struct tsens_features tsens_v2_feat = {
> .ver_major = VER_2_X,
> .crit_int = 1,
> + .combo_int = 0,
> .adc = 0,
> .srot_split = 1,
> .max_sensors = 16,
> diff --git a/drivers/thermal/qcom/tsens.c b/drivers/thermal/qcom/tsens.c
> index 7963ee33bf75..5c7f9ec6ab1c 100644
> --- a/drivers/thermal/qcom/tsens.c
> +++ b/drivers/thermal/qcom/tsens.c
> @@ -532,6 +532,27 @@ static irqreturn_t tsens_irq_thread(int irq, void *data)
> return IRQ_HANDLED;
> }
>
> +/**
> + * tsens_combined_irq_thread - Threaded interrupt handler for combined interrupts
> + * @irq: irq number
> + * @data: tsens controller private data
> + *
> + * Handle the combined interrupt as if it were 2 separate interrupts, so call the
> + * critical handler first and then the up/low one.
> + *
> + * Return: IRQ_HANDLED
> + */
> +static irqreturn_t tsens_combined_irq_thread(int irq, void *data)
> +{
> + irqreturn_t ret;
> +
> + ret = tsens_critical_irq_thread(irq, data);
> + if (ret != IRQ_HANDLED)
> + return ret;
> +
> + return tsens_irq_thread(irq, data);
> +}
> +
> static int tsens_set_trips(void *_sensor, int low, int high)
> {
> struct tsens_sensor *s = _sensor;
> @@ -1083,13 +1104,18 @@ static int tsens_register(struct tsens_priv *priv)
> tsens_mC_to_hw(priv->sensor, 0));
> }
>
> - ret = tsens_register_irq(priv, "uplow", tsens_irq_thread);
> - if (ret < 0)
> - return ret;
> + if (priv->feat->combo_int) {
> + ret = tsens_register_irq(priv, "combined",
> + tsens_combined_irq_thread);
> + } else {
> + ret = tsens_register_irq(priv, "uplow", tsens_irq_thread);
> + if (ret < 0)
> + return ret;
>
> - if (priv->feat->crit_int)
> - ret = tsens_register_irq(priv, "critical",
> - tsens_critical_irq_thread);
> + if (priv->feat->crit_int)
> + ret = tsens_register_irq(priv, "critical",
> + tsens_critical_irq_thread);
> + }
>
> return ret;
> }
> diff --git a/drivers/thermal/qcom/tsens.h b/drivers/thermal/qcom/tsens.h
> index 1471a2c00f15..4614177944d6 100644
> --- a/drivers/thermal/qcom/tsens.h
> +++ b/drivers/thermal/qcom/tsens.h
> @@ -495,6 +495,7 @@ enum regfield_ids {
> * struct tsens_features - Features supported by the IP
> * @ver_major: Major number of IP version
> * @crit_int: does the IP support critical interrupts?
> + * @combo_int: does the IP use one IRQ for up, low and critical thresholds?
> * @adc: do the sensors only output adc code (instead of temperature)?
> * @srot_split: does the IP neatly splits the register space into SROT and TM,
> * with SROT only being available to secure boot firmware?
> @@ -504,6 +505,7 @@ enum regfield_ids {
> struct tsens_features {
> unsigned int ver_major;
> unsigned int crit_int:1;
> + unsigned int combo_int:1;
> unsigned int adc:1;
> unsigned int srot_split:1;
> unsigned int has_watchdog:1;
--
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