From 47b2d3d2ed6c5c20f3521d5b615ffc92ed18b974 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Niklas=20S=C3=B6derlund?= Date: Wed, 8 Feb 2023 20:03:33 +0100 Subject: [PATCH] thermal/drivers/rcar_gen3_thermal: Fix device initialization MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit 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 Link: https://lore.kernel.org/r/20230208190333.3159879-4-niklas.soderlund+renesas@ragnatech.se Signed-off-by: Daniel Lezcano Signed-off-by: Rafael J. Wysocki --- drivers/thermal/rcar_gen3_thermal.c | 23 +++++++++++++---------- 1 file changed, 13 insertions(+), 10 deletions(-) diff --git a/drivers/thermal/rcar_gen3_thermal.c b/drivers/thermal/rcar_gen3_thermal.c index 87b0464efea0..8f0f73ea626c 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); @@ -514,6 +517,9 @@ 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); @@ -522,9 +528,6 @@ 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) @@ -562,7 +565,7 @@ static int __maybe_unused rcar_gen3_thermal_resume(struct device *dev) for (i = 0; i < priv->num_tscs; i++) { struct rcar_gen3_thermal_tsc *tsc = priv->tscs[i]; - priv->thermal_init(tsc); + priv->thermal_init(priv, tsc); } return 0;