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Commit a64ea311 authored by Benjamin Tissoires's avatar Benjamin Tissoires Committed by Dmitry Torokhov
Browse files

Input: synaptics-rmi4 - add rmi_enable/disable_irq 



Set the .enabled boolean and trigger an event processing when enabling
for edge-triggered systems.

Signed-off-by: default avatarBenjamin Tissoires <benjamin.tissoires@redhat.com>
Signed-off-by: default avatarDmitry Torokhov <dmitry.torokhov@gmail.com>
parent 0d37d63a

drivers/input/rmi4/rmi_driver.c

+64 −19
Original line number Diff line number Diff line
@@ -215,6 +215,7 @@ static irqreturn_t rmi_irq_fn(int irq, void *dev_id) 
static int rmi_irq_init(struct rmi_device *rmi_dev)

{

	struct rmi_device_platform_data *pdata = rmi_get_platform_data(rmi_dev);

	struct rmi_driver_data *data = dev_get_drvdata(&rmi_dev->dev);

	int irq_flags = irq_get_trigger_type(pdata->irq);

	int ret;
@@ -232,6 +233,8 @@ static int rmi_irq_init(struct rmi_device *rmi_dev) 
		return ret;

	}



	data->enabled = true;



	return 0;

}
@@ -866,17 +869,54 @@ static int rmi_create_function(struct rmi_device *rmi_dev, 
	return error;

}



int rmi_driver_suspend(struct rmi_device *rmi_dev, bool enable_wake)

void rmi_enable_irq(struct rmi_device *rmi_dev, bool clear_wake)

{

	struct rmi_device_platform_data *pdata = rmi_get_platform_data(rmi_dev);

	struct rmi_driver_data *data = dev_get_drvdata(&rmi_dev->dev);

	int irq = pdata->irq;

	int retval = 0;

	int irq_flags;

	int retval;



	retval = rmi_suspend_functions(rmi_dev);

	if (retval)

		dev_warn(&rmi_dev->dev, "Failed to suspend functions: %d\n",

	mutex_lock(&data->enabled_mutex);



	if (data->enabled)

		goto out;



	enable_irq(irq);

	data->enabled = true;

	if (clear_wake && device_may_wakeup(rmi_dev->xport->dev)) {

		retval = disable_irq_wake(irq);

		if (!retval)

			dev_warn(&rmi_dev->dev,

				 "Failed to disable irq for wake: %d\n",

				 retval);

	}



	/*

	 * Call rmi_process_interrupt_requests() after enabling irq,

	 * otherwise we may lose interrupt on edge-triggered systems.

	 */

	irq_flags = irq_get_trigger_type(pdata->irq);

	if (irq_flags & IRQ_TYPE_EDGE_BOTH)

		rmi_process_interrupt_requests(rmi_dev);



out:

	mutex_unlock(&data->enabled_mutex);

}



void rmi_disable_irq(struct rmi_device *rmi_dev, bool enable_wake)

{

	struct rmi_device_platform_data *pdata = rmi_get_platform_data(rmi_dev);

	struct rmi_driver_data *data = dev_get_drvdata(&rmi_dev->dev);

	int irq = pdata->irq;

	int retval;



	mutex_lock(&data->enabled_mutex);



	if (!data->enabled)

		goto out;



	data->enabled = false;

	disable_irq(irq);

	if (enable_wake && device_may_wakeup(rmi_dev->xport->dev)) {

		retval = enable_irq_wake(irq);
@@ -885,24 +925,30 @@ int rmi_driver_suspend(struct rmi_device *rmi_dev, bool enable_wake) 
				 "Failed to enable irq for wake: %d\n",

				 retval);

	}



out:

	mutex_unlock(&data->enabled_mutex);

}



int rmi_driver_suspend(struct rmi_device *rmi_dev, bool enable_wake)

{

	int retval;



	retval = rmi_suspend_functions(rmi_dev);

	if (retval)

		dev_warn(&rmi_dev->dev, "Failed to suspend functions: %d\n",

			retval);



	rmi_disable_irq(rmi_dev, enable_wake);

	return retval;

}

EXPORT_SYMBOL_GPL(rmi_driver_suspend);



int rmi_driver_resume(struct rmi_device *rmi_dev, bool clear_wake)

{

	struct rmi_device_platform_data *pdata = rmi_get_platform_data(rmi_dev);

	int irq = pdata->irq;

	int retval;



	enable_irq(irq);

	if (clear_wake && device_may_wakeup(rmi_dev->xport->dev)) {

		retval = disable_irq_wake(irq);

		if (!retval)

			dev_warn(&rmi_dev->dev,

				 "Failed to disable irq for wake: %d\n",

				 retval);

	}

	rmi_enable_irq(rmi_dev, clear_wake);



	retval = rmi_resume_functions(rmi_dev);

	if (retval)
@@ -916,10 +962,8 @@ EXPORT_SYMBOL_GPL(rmi_driver_resume); 
static int rmi_driver_remove(struct device *dev)

{

	struct rmi_device *rmi_dev = to_rmi_device(dev);

	struct rmi_device_platform_data *pdata = rmi_get_platform_data(rmi_dev);

	int irq = pdata->irq;



	disable_irq(irq);

	rmi_disable_irq(rmi_dev, false);



	rmi_f34_remove_sysfs(rmi_dev);

	rmi_free_function_list(rmi_dev);
@@ -1108,6 +1152,7 @@ static int rmi_driver_probe(struct device *dev) 
	}



	mutex_init(&data->irq_mutex);

	mutex_init(&data->enabled_mutex);



	retval = rmi_probe_interrupts(data);

	if (retval)

drivers/input/rmi4/rmi_driver.h

+2 −0
Original line number Diff line number Diff line
@@ -101,6 +101,8 @@ int rmi_scan_pdt(struct rmi_device *rmi_dev, void *ctx, 
		 int (*callback)(struct rmi_device *rmi_dev, void *ctx,

		 const struct pdt_entry *entry));

int rmi_probe_interrupts(struct rmi_driver_data *data);

void rmi_enable_irq(struct rmi_device *rmi_dev, bool clear_wake);

void rmi_disable_irq(struct rmi_device *rmi_dev, bool enable_wake);

int rmi_init_functions(struct rmi_driver_data *data);

int rmi_initial_reset(struct rmi_device *rmi_dev, void *ctx,

		      const struct pdt_entry *pdt);

include/linux/rmi.h

+1 −0
Original line number Diff line number Diff line
@@ -356,6 +356,7 @@ struct rmi_driver_data { 
	u8 num_tx_electrodes;



	bool enabled;

	struct mutex enabled_mutex;

};



int rmi_register_transport_device(struct rmi_transport_dev *xport);