thermal/drivers/imx91: Add hwmon support

Expose thermal readings as a HWMON device, so that it could be
accessed using lm-sensors.

Signed-off-by: Alexander Stein <alexander.stein@ew.tq-group.com>
Link: https://patch.msgid.link/20260306133017.3189979-1-alexander.stein@ew.tq-group.com
Signed-off-by: Daniel Lezcano <daniel.lezcano@kernel.org>

Author: tq-steina

drivers/thermal/imx91_thermal.c

@@ -17,6 +17,8 @@
 #include <linux/thermal.h>
 #include <linux/units.h>
 
+#include "thermal_hwmon.h"
+
 #define REG_SET					0x4
 #define REG_CLR					0x8
 #define REG_TOG					0xc
@@ -318,6 +320,8 @@ static int imx91_tmu_probe(struct platform_device *pdev)
 		return dev_err_probe(dev, PTR_ERR(tmu->tzd),
 				     "failed to register thermal zone sensor\n");
 
+	devm_thermal_add_hwmon_sysfs(dev, tmu->tzd);
+
 	irq = platform_get_irq(pdev, 0);
 	if (irq < 0)
 		return irq;