iio/trigger/stm32-lptimer-trigger.c

1 // SPDX-License-Identifier: GPL-2.0
3  * STM32 Low-Power Timer Trigger driver
9  * Inspired by Benjamin Gaignard's stm32-timer-trigger driver
12 #include <linux/iio/timer/stm32-lptim-trigger.h>
13 #include <linux/mfd/stm32-lptimer.h>
19 /* List Low-Power Timer triggers */
34 	if (indio_dev->modes & INDIO_HARDWARE_TRIGGERED)  in stm32_lptim_validate_device()
37 	return -EINVAL;  in stm32_lptim_validate_device()
48  * return true if the trigger is a valid STM32 IIO Low-Power Timer Trigger
53 	return (trig->ops == &stm32_lptim_trigger_ops);  in is_stm32_lptim_trigger()
61 	trig = devm_iio_trigger_alloc(priv->dev, "%s", priv->trg);  in stm32_lptim_setup_trig()
63 		return -ENOMEM;  in stm32_lptim_setup_trig()
65 	trig->dev.parent = priv->dev->parent;  in stm32_lptim_setup_trig()
66 	trig->ops = &stm32_lptim_trigger_ops;  in stm32_lptim_setup_trig()
69 	return devm_iio_trigger_register(priv->dev, trig);  in stm32_lptim_setup_trig()
77 	priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);  in stm32_lptim_trigger_probe()
79 		return -ENOMEM;  in stm32_lptim_trigger_probe()
81 	if (device_property_read_u32(&pdev->dev, "reg", &index))  in stm32_lptim_trigger_probe()
82 		return -EINVAL;  in stm32_lptim_trigger_probe()
85 		return -EINVAL;  in stm32_lptim_trigger_probe()
87 	priv->dev = &pdev->dev;  in stm32_lptim_trigger_probe()
88 	priv->trg = stm32_lptim_triggers[index];  in stm32_lptim_trigger_probe()
94 	{ .compatible = "st,stm32-lptimer-trigger", },
102 		.name = "stm32-lptimer-trigger",
109 MODULE_ALIAS("platform:stm32-lptimer-trigger");
110 MODULE_DESCRIPTION("STMicroelectronics STM32 LPTIM trigger driver");