linux-kernel - [PATCH 02/10] mfd: cros_ec: IRQs for cros

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Date:	Mon, 16 Jun 2014 14:39:52 -0700
From:	Doug Anderson <dianders@...omium.org>
To:	Lee Jones <lee.jones@...aro.org>
Cc:	Andrew Bresticker <abrestic@...omium.org>, swarren@...dotorg.org,
	olof@...om.net, Sonny Rao <sonnyrao@...omium.org>,
	linux-samsung-soc@...r.kernel.org,
	Javier Martinez Canillas <javier.martinez@...labora.co.uk>,
	Bill Richardson <wfrichar@...omium.org>, sjg@...omium.org,
	Wolfram Sang <wsa@...-dreams.de>, broonie@...nel.org,
	Doug Anderson <dianders@...omium.org>, sameo@...ux.intel.com,
	linux-kernel@...r.kernel.org
Subject: [PATCH 02/10] mfd: cros_ec: IRQs for cros_ec should be optional

From: Bill Richardson <wfrichar@...omium.org>

Preparing the way for the LPC device, which is just a plaform_device without
interrupts.

Signed-off-by: Bill Richardson <wfrichar@...omium.org>
Signed-off-by: Doug Anderson <dianders@...omium.org>
---
 drivers/mfd/cros_ec.c | 26 +++++++++++++-------------
 1 file changed, 13 insertions(+), 13 deletions(-)

diff --git a/drivers/mfd/cros_ec.c b/drivers/mfd/cros_ec.c
index 38fe9bf..bd6f936 100644
--- a/drivers/mfd/cros_ec.c
+++ b/drivers/mfd/cros_ec.c
@@ -119,17 +119,15 @@ int cros_ec_register(struct cros_ec_device *ec_dev)
 			return -ENOMEM;
 	}
 
-	if (!ec_dev->irq) {
-		dev_dbg(dev, "no valid IRQ: %d\n", ec_dev->irq);
-		return err;
-	}
-
-	err = request_threaded_irq(ec_dev->irq, NULL, ec_irq_thread,
-				   IRQF_TRIGGER_LOW | IRQF_ONESHOT,
-				   "chromeos-ec", ec_dev);
-	if (err) {
-		dev_err(dev, "request irq %d: error %d\n", ec_dev->irq, err);
-		return err;
+	if (ec_dev->irq) {
+		err = request_threaded_irq(ec_dev->irq, NULL, ec_irq_thread,
+					IRQF_TRIGGER_LOW | IRQF_ONESHOT,
+					"chromeos-ec", ec_dev);
+		if (err) {
+			dev_err(dev, "request irq %d: error %d\n",
+				ec_dev->irq, err);
+			return err;
+		}
 	}
 
 	err = mfd_add_devices(dev, 0, cros_devs,
@@ -145,7 +143,8 @@ int cros_ec_register(struct cros_ec_device *ec_dev)
 	return 0;
 
 fail_mfd:
-	free_irq(ec_dev->irq, ec_dev);
+	if (ec_dev->irq)
+		free_irq(ec_dev->irq, ec_dev);
 
 	return err;
 }
@@ -154,7 +153,8 @@ EXPORT_SYMBOL(cros_ec_register);
 int cros_ec_remove(struct cros_ec_device *ec_dev)
 {
 	mfd_remove_devices(ec_dev->dev);
-	free_irq(ec_dev->irq, ec_dev);
+	if (ec_dev->irq)
+		free_irq(ec_dev->irq, ec_dev);
 
 	return 0;
 }
-- 
2.0.0.526.g5318336

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