Input: synaptics-rmi4 - move IRQ handling to rmi_driver

The attn IRQ is related to the chip, rather than the transport, so move
all handling of interrupts to the core driver. This also makes sure that
there are no races between interrupts and availability of the resources
used by the core driver.

Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Signed-off-by: Benjamin Tissoires <benjamin.tissoires@redhat.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>

1 files changed, 5 insertions, 67 deletions

diff --git a/drivers/input/rmi4/rmi_spi.c b/drivers/input/rmi4/rmi_spi.c
index 55bd1b34970c..f3e9e488635c 100644
--- a/drivers/input/rmi4/rmi_spi.c
+++ b/drivers/input/rmi4/rmi_spi.c
@@ -12,7 +12,6 @@
 #include <linux/rmi.h>
 #include <linux/slab.h>
 #include <linux/spi/spi.h>
-#include <linux/irq.h>
 #include <linux/of.h>
 #include "rmi_driver.h"
 
@@ -44,8 +43,6 @@ struct rmi_spi_xport {
 	struct mutex page_mutex;
 	int page;
 
-	int irq;
-
 	u8 *rx_buf;
 	u8 *tx_buf;
 	int xfer_buf_size;
@@ -326,41 +323,6 @@ static const struct rmi_transport_ops rmi_spi_ops = {
 	.read_block	= rmi_spi_read_block,
 };
 
-static irqreturn_t rmi_spi_irq(int irq, void *dev_id)
-{
-	struct rmi_spi_xport *rmi_spi = dev_id;
-	struct rmi_device *rmi_dev = rmi_spi->xport.rmi_dev;
-	int ret;
-
-	ret = rmi_process_interrupt_requests(rmi_dev);
-	if (ret)
-		rmi_dbg(RMI_DEBUG_XPORT, &rmi_dev->dev,
-			"Failed to process interrupt request: %d\n", ret);
-
-	return IRQ_HANDLED;
-}
-
-static int rmi_spi_init_irq(struct spi_device *spi)
-{
-	struct rmi_spi_xport *rmi_spi = spi_get_drvdata(spi);
-	int irq_flags = irqd_get_trigger_type(irq_get_irq_data(rmi_spi->irq));
-	int ret;
-
-	if (!irq_flags)
-		irq_flags = IRQF_TRIGGER_LOW;
-
-	ret = devm_request_threaded_irq(&spi->dev, rmi_spi->irq, NULL,
-			rmi_spi_irq, irq_flags | IRQF_ONESHOT,
-			dev_name(&spi->dev), rmi_spi);
-	if (ret < 0) {
-		dev_warn(&spi->dev, "Failed to register interrupt %d\n",
-			rmi_spi->irq);
-		return ret;
-	}
-
-	return 0;
-}
-
 #ifdef CONFIG_OF
 static int rmi_spi_of_probe(struct spi_device *spi,
 			struct rmi_device_platform_data *pdata)
@@ -433,8 +395,7 @@ static int rmi_spi_probe(struct spi_device *spi)
 		return retval;
 	}
 
-	if (spi->irq > 0)
-		rmi_spi->irq = spi->irq;
+	pdata->irq = spi->irq;
 
 	rmi_spi->spi = spi;
 	mutex_init(&rmi_spi->page_mutex);
@@ -465,10 +426,6 @@ static int rmi_spi_probe(struct spi_device *spi)
 		return retval;
 	}
 
-	retval = rmi_spi_init_irq(spi);
-	if (retval < 0)
-		return retval;
-
 	dev_info(&spi->dev, "registered RMI SPI driver\n");
 	return 0;
 }
@@ -489,17 +446,10 @@ static int rmi_spi_suspend(struct device *dev)
 	struct rmi_spi_xport *rmi_spi = spi_get_drvdata(spi);
 	int ret;
 
-	ret = rmi_driver_suspend(rmi_spi->xport.rmi_dev);
+	ret = rmi_driver_suspend(rmi_spi->xport.rmi_dev, true);
 	if (ret)
 		dev_warn(dev, "Failed to resume device: %d\n", ret);
 
-	disable_irq(rmi_spi->irq);
-	if (device_may_wakeup(&spi->dev)) {
-		ret = enable_irq_wake(rmi_spi->irq);
-		if (!ret)
-			dev_warn(dev, "Failed to enable irq for wake: %d\n",
-				ret);
-	}
 	return ret;
 }
 
@@ -509,15 +459,7 @@ static int rmi_spi_resume(struct device *dev)
 	struct rmi_spi_xport *rmi_spi = spi_get_drvdata(spi);
 	int ret;
 
-	enable_irq(rmi_spi->irq);
-	if (device_may_wakeup(&spi->dev)) {
-		ret = disable_irq_wake(rmi_spi->irq);
-		if (!ret)
-			dev_warn(dev, "Failed to disable irq for wake: %d\n",
-				ret);
-	}
-
-	ret = rmi_driver_resume(rmi_spi->xport.rmi_dev);
+	ret = rmi_driver_resume(rmi_spi->xport.rmi_dev, true);
 	if (ret)
 		dev_warn(dev, "Failed to resume device: %d\n", ret);
 
@@ -532,12 +474,10 @@ static int rmi_spi_runtime_suspend(struct device *dev)
 	struct rmi_spi_xport *rmi_spi = spi_get_drvdata(spi);
 	int ret;
 
-	ret = rmi_driver_suspend(rmi_spi->xport.rmi_dev);
+	ret = rmi_driver_suspend(rmi_spi->xport.rmi_dev, false);
 	if (ret)
 		dev_warn(dev, "Failed to resume device: %d\n", ret);
 
-	disable_irq(rmi_spi->irq);
-
 	return 0;
 }
 
@@ -547,9 +487,7 @@ static int rmi_spi_runtime_resume(struct device *dev)
 	struct rmi_spi_xport *rmi_spi = spi_get_drvdata(spi);
 	int ret;
 
-	enable_irq(rmi_spi->irq);
-
-	ret = rmi_driver_resume(rmi_spi->xport.rmi_dev);
+	ret = rmi_driver_resume(rmi_spi->xport.rmi_dev, false);
 	if (ret)
 		dev_warn(dev, "Failed to resume device: %d\n", ret);