linux-kernel - [PATCH v2 5/9] mlxsw: core_thermal: Set THERMAL_TRIP_FLAG_RW

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Date: Mon, 12 Feb 2024 19:35:56 +0100
From: "Rafael J. Wysocki" <rjw@...ysocki.net>
To: Linux PM <linux-pm@...r.kernel.org>
Cc: Lukasz Luba <lukasz.luba@....com>, LKML <linux-kernel@...r.kernel.org>,
 Daniel Lezcano <daniel.lezcano@...aro.org>,
 Stanislaw Gruszka <stanislaw.gruszka@...ux.intel.com>,
 Srinivas Pandruvada <srinivas.pandruvada@...ux.intel.com>,
 Zhang Rui <rui.zhang@...el.com>, netdev@...r.kernel.org,
 Ido Schimmel <idosch@...dia.com>, Petr Machata <petrm@...dia.com>,
 Miri Korenblit <miriam.rachel.korenblit@...el.com>,
 linux-wireless@...r.kernel.org, Shawn Guo <shawnguo@...nel.org>,
 Sascha Hauer <s.hauer@...gutronix.de>,
 Pengutronix Kernel Team <kernel@...gutronix.de>,
 Manaf Meethalavalappu Pallikunhi <quic_manafm@...cinc.com>
Subject:
 [PATCH v2 5/9] mlxsw: core_thermal: Set THERMAL_TRIP_FLAG_RW_TEMP directly

From: Rafael J. Wysocki <rafael.j.wysocki@...el.com>

It is now possible to flag trip points with THERMAL_TRIP_FLAG_RW_TEMP
to allow their temperature to be set from user space via sysfs instead
of using a nonzero writable trips mask during thermal zone registration,
so make the mlxsw code do that.

No intentional functional impact.

Note that this change is requisite for dropping the mask argument from
thermal_zone_device_register_with_trips() going forward.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@...el.com>
Reviewed-by: Ido Schimmel <idosch@...dia.com>
---

v1 -> v2:
   * Rename trip flag (Stanislaw).
   * Add R-by from Ido.

---
 drivers/net/ethernet/mellanox/mlxsw/core_thermal.c |   15 +++++++++------
 1 file changed, 9 insertions(+), 6 deletions(-)

Index: linux-pm/drivers/net/ethernet/mellanox/mlxsw/core_thermal.c
===================================================================
--- linux-pm.orig/drivers/net/ethernet/mellanox/mlxsw/core_thermal.c
+++ linux-pm/drivers/net/ethernet/mellanox/mlxsw/core_thermal.c
@@ -44,16 +44,19 @@ static const struct thermal_trip default
 		.type		= THERMAL_TRIP_ACTIVE,
 		.temperature	= MLXSW_THERMAL_ASIC_TEMP_NORM,
 		.hysteresis	= MLXSW_THERMAL_HYSTERESIS_TEMP,
+		.flags		= THERMAL_TRIP_FLAG_RW_TEMP,
 	},
 	{
 		/* In range - 40-100% PWM */
 		.type		= THERMAL_TRIP_ACTIVE,
 		.temperature	= MLXSW_THERMAL_ASIC_TEMP_HIGH,
 		.hysteresis	= MLXSW_THERMAL_HYSTERESIS_TEMP,
+		.flags		= THERMAL_TRIP_FLAG_RW_TEMP,
 	},
 	{	/* Warning */
 		.type		= THERMAL_TRIP_HOT,
 		.temperature	= MLXSW_THERMAL_ASIC_TEMP_HOT,
+		.flags		= THERMAL_TRIP_FLAG_RW_TEMP,
 	},
 };
 
@@ -62,16 +65,19 @@ static const struct thermal_trip default
 		.type		= THERMAL_TRIP_ACTIVE,
 		.temperature	= MLXSW_THERMAL_MODULE_TEMP_NORM,
 		.hysteresis	= MLXSW_THERMAL_HYSTERESIS_TEMP,
+		.flags		= THERMAL_TRIP_FLAG_RW_TEMP,
 	},
 	{
 		/* In range - 40-100% PWM */
 		.type		= THERMAL_TRIP_ACTIVE,
 		.temperature	= MLXSW_THERMAL_MODULE_TEMP_HIGH,
 		.hysteresis	= MLXSW_THERMAL_HYSTERESIS_TEMP,
+		.flags		= THERMAL_TRIP_FLAG_RW_TEMP,
 	},
 	{	/* Warning */
 		.type		= THERMAL_TRIP_HOT,
 		.temperature	= MLXSW_THERMAL_MODULE_TEMP_HOT,
+		.flags		= THERMAL_TRIP_FLAG_RW_TEMP,
 	},
 };
 
@@ -92,9 +98,6 @@ static const struct mlxsw_cooling_states
 
 #define MLXSW_THERMAL_NUM_TRIPS	ARRAY_SIZE(default_thermal_trips)
 
-/* Make sure all trips are writable */
-#define MLXSW_THERMAL_TRIP_MASK	(BIT(MLXSW_THERMAL_NUM_TRIPS) - 1)
-
 struct mlxsw_thermal;
 
 struct mlxsw_thermal_module {
@@ -420,7 +423,7 @@ mlxsw_thermal_module_tz_init(struct mlxs
 	module_tz->tzdev = thermal_zone_device_register_with_trips(tz_name,
 							module_tz->trips,
 							MLXSW_THERMAL_NUM_TRIPS,
-							MLXSW_THERMAL_TRIP_MASK,
+							0,
 							module_tz,
 							&mlxsw_thermal_module_ops,
 							&mlxsw_thermal_params,
@@ -548,7 +551,7 @@ mlxsw_thermal_gearbox_tz_init(struct mlx
 	gearbox_tz->tzdev = thermal_zone_device_register_with_trips(tz_name,
 						gearbox_tz->trips,
 						MLXSW_THERMAL_NUM_TRIPS,
-						MLXSW_THERMAL_TRIP_MASK,
+						0,
 						gearbox_tz,
 						&mlxsw_thermal_gearbox_ops,
 						&mlxsw_thermal_params, 0,
@@ -773,7 +776,7 @@ int mlxsw_thermal_init(struct mlxsw_core
 	thermal->tzdev = thermal_zone_device_register_with_trips("mlxsw",
 						      thermal->trips,
 						      MLXSW_THERMAL_NUM_TRIPS,
-						      MLXSW_THERMAL_TRIP_MASK,
+						      0,
 						      thermal,
 						      &mlxsw_thermal_ops,
 						      &mlxsw_thermal_params, 0,