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[79.202.39.146]) by smtp.googlemail.com with ESMTPSA id n23-20020a1709062bd700b007a4e02e32ffsm7132298ejg.60.2023.02.07.09.11.11 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 07 Feb 2023 09:11:11 -0800 (PST) From: =?utf-8?q?Niklas_S=C3=B6derlund?= To: Daniel Lezcano , Wolfram Sang , linux-pm@vger.kernel.org Cc: linux-renesas-soc@vger.kernel.org, =?utf-8?q?Niklas_S=C3=B6derlund?= Subject: [PATCH 2/2] drivers/thermal/rcar_gen3_thermal: Fix device initialization Date: Tue, 7 Feb 2023 18:10:11 +0100 Message-Id: <20230207171011.1596127-3-niklas.soderlund+renesas@ragnatech.se> X-Mailer: git-send-email 2.39.1 In-Reply-To: <20230207171011.1596127-1-niklas.soderlund+renesas@ragnatech.se> References: <20230207171011.1596127-1-niklas.soderlund+renesas@ragnatech.se> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org The thermal zone is registered before the device is register and the thermal coefficients are calculated, providing a window for very incorrect readings. The reason why the zone was register before the device was fully initialized was that the presence of the set_trips() callback is used to determine if the driver supports interrupt or not, as it is not defined if the device is incapable of interrupts. Fix this by using the operations structure in the private data instead of the zone to determine if interrupts are available or not, and initialize the device before registering the zone. Signed-off-by: Niklas Söderlund Reviewed-by: Wolfram Sang --- drivers/thermal/rcar_gen3_thermal.c | 25 ++++++++++++++----------- 1 file changed, 14 insertions(+), 11 deletions(-) diff --git a/drivers/thermal/rcar_gen3_thermal.c b/drivers/thermal/rcar_gen3_thermal.c index bfa2ff20b945..1dedeece1a00 100644 --- a/drivers/thermal/rcar_gen3_thermal.c +++ b/drivers/thermal/rcar_gen3_thermal.c @@ -89,7 +89,8 @@ struct rcar_gen3_thermal_priv { struct rcar_gen3_thermal_tsc *tscs[TSC_MAX_NUM]; struct thermal_zone_device_ops ops; unsigned int num_tscs; - void (*thermal_init)(struct rcar_gen3_thermal_tsc *tsc); + void (*thermal_init)(struct rcar_gen3_thermal_priv *priv, + struct rcar_gen3_thermal_tsc *tsc); int ptat[3]; }; @@ -240,7 +241,7 @@ static irqreturn_t rcar_gen3_thermal_irq(int irq, void *data) for (i = 0; i < priv->num_tscs; i++) { status = rcar_gen3_thermal_read(priv->tscs[i], REG_GEN3_IRQSTR); rcar_gen3_thermal_write(priv->tscs[i], REG_GEN3_IRQSTR, 0); - if (status) + if (status && priv->tscs[i]->zone) thermal_zone_device_update(priv->tscs[i]->zone, THERMAL_EVENT_UNSPECIFIED); } @@ -311,7 +312,8 @@ static bool rcar_gen3_thermal_read_fuses(struct rcar_gen3_thermal_priv *priv) return true; } -static void rcar_gen3_thermal_init_r8a7795es1(struct rcar_gen3_thermal_tsc *tsc) +static void rcar_gen3_thermal_init_r8a7795es1(struct rcar_gen3_thermal_priv *priv, + struct rcar_gen3_thermal_tsc *tsc) { rcar_gen3_thermal_write(tsc, REG_GEN3_CTSR, CTSR_THBGR); rcar_gen3_thermal_write(tsc, REG_GEN3_CTSR, 0x0); @@ -322,7 +324,7 @@ static void rcar_gen3_thermal_init_r8a7795es1(struct rcar_gen3_thermal_tsc *tsc) rcar_gen3_thermal_write(tsc, REG_GEN3_IRQCTL, 0x3F); rcar_gen3_thermal_write(tsc, REG_GEN3_IRQMSK, 0); - if (tsc->zone->ops->set_trips) + if (priv->ops.set_trips) rcar_gen3_thermal_write(tsc, REG_GEN3_IRQEN, IRQ_TEMPD1 | IRQ_TEMP2); @@ -338,7 +340,8 @@ static void rcar_gen3_thermal_init_r8a7795es1(struct rcar_gen3_thermal_tsc *tsc) usleep_range(1000, 2000); } -static void rcar_gen3_thermal_init(struct rcar_gen3_thermal_tsc *tsc) +static void rcar_gen3_thermal_init(struct rcar_gen3_thermal_priv *priv, + struct rcar_gen3_thermal_tsc *tsc) { u32 reg_val; @@ -350,7 +353,7 @@ static void rcar_gen3_thermal_init(struct rcar_gen3_thermal_tsc *tsc) rcar_gen3_thermal_write(tsc, REG_GEN3_IRQCTL, 0); rcar_gen3_thermal_write(tsc, REG_GEN3_IRQMSK, 0); - if (tsc->zone->ops->set_trips) + if (priv->ops.set_trips) rcar_gen3_thermal_write(tsc, REG_GEN3_IRQEN, IRQ_TEMPD1 | IRQ_TEMP2); @@ -510,6 +513,9 @@ static int rcar_gen3_thermal_probe(struct platform_device *pdev) for (i = 0; i < priv->num_tscs; i++) { struct rcar_gen3_thermal_tsc *tsc = priv->tscs[i]; + priv->thermal_init(priv, tsc); + rcar_gen3_thermal_calc_coefs(priv, tsc, *ths_tj_1); + zone = devm_thermal_of_zone_register(dev, i, tsc, &priv->ops); if (IS_ERR(zone)) { dev_err(dev, "Sensor %u: Can't register thermal zone\n", i); @@ -518,9 +524,6 @@ static int rcar_gen3_thermal_probe(struct platform_device *pdev) } tsc->zone = zone; - priv->thermal_init(tsc); - rcar_gen3_thermal_calc_coefs(priv, tsc, *ths_tj_1); - tsc->zone->tzp->no_hwmon = false; ret = thermal_add_hwmon_sysfs(tsc->zone); if (ret) @@ -559,8 +562,8 @@ static int __maybe_unused rcar_gen3_thermal_resume(struct device *dev) struct rcar_gen3_thermal_tsc *tsc = priv->tscs[i]; struct thermal_zone_device *zone = tsc->zone; - priv->thermal_init(tsc); - if (zone->ops->set_trips) + priv->thermal_init(priv, tsc); + if (priv->ops.set_trips) rcar_gen3_thermal_set_trips(zone, zone->prev_low_trip, zone->prev_high_trip); }