drivers: stepper: simplify event detection config

Simplified by removing redundant options and
enabled automatic fallback to ramp status polling when
diag0 pin is unavailable for event detection.

Signed-off-by: Dipak Shetty <shetty.dipak@gmx.com>

Author: dipakgmx

drivers/stepper/adi_tmc/Kconfig.tmc_rampgen_template

@@ -1,27 +1,18 @@
 # SPDX-FileCopyrightText: Copyright (c) 2024 Jilay Sandeep Pandya
 # SPDX-License-Identifier: Apache-2.0
 
-config STEPPER_ADI_$(module)_RAMPSTAT_POLL
-	bool "$(module-str) poll ramp status"
-	depends on STEPPER_ADI_$(module)
-	default y
-	help
-	  When enabled, the ramp status will be polled on TMC, to check for events:
-	  - TMC_POS_REACHED_EVENT
-	  - TMC_STOP_SG_EVENT
-	  - TMC_STOP_LEFT_EVENT
-	  - TMC_STOP_RIGHT_EVENT
-
 config STEPPER_ADI_$(module)_RAMPSTAT_POLL_INTERVAL_IN_MSEC
 	int "$(module-str) poll ramp status interval in ms"
-	depends on STEPPER_ADI_$(module)_RAMPSTAT_POLL
+	depends on !$(dt_compat_any_has_prop,$(DT_COMPAT_ADI_$(module)),diag0-gpios)
 	default 100
 	help
-	  The interval in ms to poll the ramp status on TMC.
+	  When DIAG0 pin is not available, the driver automatically falls back to
+	  polling. This setting controls how frequently (in milliseconds) the driver
+	  polls the ramp status register to detect events like position reached, stall
+	  or end stop triggered.
 
 config STEPPER_ADI_$(module)_RAMPSTAT_POLL_STALLGUARD_LOG
 	bool "log $(module-str) stallguard"
-	depends on STEPPER_ADI_$(module)_RAMPSTAT_POLL
 	default n
 	help
 	  Enable stallguard log while polling rampstat.

drivers/stepper/adi_tmc/tmc50xx.c

@@ -30,9 +30,7 @@ struct tmc50xx_config {
 struct tmc50xx_stepper_data {
 	struct k_work_delayable stallguard_dwork;
 	/* Work item to run the callback in a thread context. */
-#ifdef CONFIG_STEPPER_ADI_TMC50XX_RAMPSTAT_POLL
 	struct k_work_delayable rampstat_callback_dwork;
-#endif
 	/* device pointer required to access config in k_work */
 	const struct device *stepper;
 	stepper_event_callback_t callback;
@@ -177,7 +175,6 @@ static void stallguard_work_handler(struct k_work *work)
 	}
 }
 
-#ifdef CONFIG_STEPPER_ADI_TMC50XX_RAMPSTAT_POLL
 
 static void execute_callback(const struct device *dev, const enum stepper_event event)
 {
@@ -297,8 +294,6 @@ static void rampstat_work_handler(struct k_work *work)
 	}
 }
 
-#endif
-
 static int tmc50xx_stepper_enable(const struct device *dev)
 {
 	LOG_DBG("Enabling Stepper motor controller %s", dev->name);
@@ -486,11 +481,9 @@ static int tmc50xx_stepper_move_to(const struct device *dev, const int32_t micro
 		k_work_reschedule(&data->stallguard_dwork,
 				  K_MSEC(config->sg_velocity_check_interval_ms));
 	}
-#ifdef CONFIG_STEPPER_ADI_TMC50XX_RAMPSTAT_POLL
 	if (data->callback) {
 		rampstat_work_reschedule(&data->rampstat_callback_dwork);
 	}
-#endif
 	return 0;
 }
 
@@ -546,11 +539,9 @@ static int tmc50xx_stepper_run(const struct device *dev, const enum stepper_dire
 		k_work_reschedule(&data->stallguard_dwork,
 				  K_MSEC(config->sg_velocity_check_interval_ms));
 	}
-#ifdef CONFIG_STEPPER_ADI_TMC50XX_RAMPSTAT_POLL
 	if (data->callback) {
 		rampstat_work_reschedule(&data->rampstat_callback_dwork);
 	}
-#endif
 	return 0;
 }
 
@@ -695,10 +686,8 @@ static int tmc50xx_stepper_init(const struct device *dev)
 	}
 #endif
 
-#if CONFIG_STEPPER_ADI_TMC50XX_RAMPSTAT_POLL
 	k_work_init_delayable(&data->rampstat_callback_dwork, rampstat_work_handler);
 	rampstat_work_reschedule(&data->rampstat_callback_dwork);
-#endif
 	err = tmc50xx_stepper_set_micro_step_res(dev, stepper_config->default_micro_step_res);
 	if (err != 0) {
 		return -EIO;