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Message-id: <1371001149-16906-1-git-send-email-cw00.choi@samsung.com>
Date: Wed, 12 Jun 2013 10:39:09 +0900
From: Chanwoo Choi <cw00.choi@...sung.com>
To: kishon@...com, myungjoo.ham@...sung.com, cw00.choi@...sung.com,
balbi@...com, devicetree-discuss@...ts.ozlabs.org,
linux-doc@...r.kernel.org, linux-kernel@...r.kernel.org,
linux-usb@...r.kernel.org, linux-omap@...r.kernel.org
Cc: grant.likely@...aro.org, rob.herring@...xeda.com, rob@...dley.net,
gregkh@...uxfoundation.org, benoit.cousson@...aro.org,
anish198519851985@...il.com, pmeerw@...erw.net
Subject: [PATCH] extcon: Add an API to get extcon device from dt node
From: Kishon Vijay Abraham I <kishon@...com>
Added an API of_extcon_get_extcon_dev() to be used by drivers to get
extcon device in the case of dt boot (this can be used instead of
extcon_get_extcon_dev()).
Signed-off-by: Kishon Vijay Abraham I <kishon@...com>
Signed-off-by: Chanwoo Choi <cw00.choi@...sung.com>
Signed-off-by: Myungjoo Ham <myungjoo.ham@...sung.com>
---
drivers/extcon/Makefile | 3 +++
drivers/extcon/of-extcon.c | 56 ++++++++++++++++++++++++++++++++++++++++
include/linux/extcon/of-extcon.h | 30 +++++++++++++++++++++
3 files changed, 89 insertions(+)
create mode 100644 drivers/extcon/of-extcon.c
create mode 100644 include/linux/extcon/of-extcon.h
diff --git a/drivers/extcon/Makefile b/drivers/extcon/Makefile
index 540e2c3..39cdf95 100644
--- a/drivers/extcon/Makefile
+++ b/drivers/extcon/Makefile
@@ -2,9 +2,12 @@
# Makefile for external connector class (extcon) devices
#
+obj-$(CONFIG_OF) += of-extcon.o
+
obj-$(CONFIG_EXTCON) += extcon-class.o
obj-$(CONFIG_EXTCON_GPIO) += extcon-gpio.o
obj-$(CONFIG_EXTCON_ADC_JACK) += extcon-adc-jack.o
+
obj-$(CONFIG_EXTCON_MAX77693) += extcon-max77693.o
obj-$(CONFIG_EXTCON_MAX8997) += extcon-max8997.o
obj-$(CONFIG_EXTCON_ARIZONA) += extcon-arizona.o
diff --git a/drivers/extcon/of-extcon.c b/drivers/extcon/of-extcon.c
new file mode 100644
index 0000000..29f82b4
--- /dev/null
+++ b/drivers/extcon/of-extcon.c
@@ -0,0 +1,56 @@
+/*
+ * OF helpers for External connector (extcon) framework
+ *
+ * Copyright (C) 2013 Texas Instruments, Inc.
+ * Kishon Vijay Abraham I <kishon@...com>
+ *
+ * Copyright (C) 2013 Samsung Electronics
+ * Chanwoo Choi <cw00.choi@...sung.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ */
+
+#include <linux/module.h>
+#include <linux/slab.h>
+#include <linux/extcon.h>
+#include <linux/of.h>
+#include <linux/of_platform.h>
+#include <linux/extcon/of-extcon.h>
+
+struct extcon_dev *of_extcon_get_extcon_dev(struct device *dev, int index)
+{
+ struct device_node *node;
+ struct extcon_dev *edev;
+ struct platform_device *extcon_parent_dev;
+
+ if (!dev->of_node) {
+ dev_dbg(dev, "device does not have a device node entry\n");
+ return ERR_PTR(-EINVAL);
+ }
+
+ node = of_parse_phandle(dev->of_node, "extcon", index);
+ if (!node) {
+ dev_dbg(dev, "failed to get phandle in %s node\n",
+ dev->of_node->full_name);
+ return ERR_PTR(-ENODEV);
+ }
+
+ extcon_parent_dev = of_find_device_by_node(node);
+ if (!extcon_parent_dev) {
+ dev_dbg(dev, "unable to find device by node\n");
+ return ERR_PTR(-EPROBE_DEFER);
+ }
+
+ edev = extcon_get_extcon_dev(dev_name(&extcon_parent_dev->dev));
+ if (!edev) {
+ dev_dbg(dev, "unable to get extcon device : %s\n",
+ dev_name(&extcon_parent_dev->dev));
+ return ERR_PTR(-ENODEV);
+ }
+
+ return edev;
+}
+EXPORT_SYMBOL_GPL(of_extcon_get_extcon_dev);
diff --git a/include/linux/extcon/of-extcon.h b/include/linux/extcon/of-extcon.h
new file mode 100644
index 0000000..77d01ba
--- /dev/null
+++ b/include/linux/extcon/of-extcon.h
@@ -0,0 +1,30 @@
+/*
+ * OF helpers for External connector (extcon) framework
+ *
+ * Copyright (C) 2013 Texas Instruments, Inc.
+ * Kishon Vijay Abraham I <kishon@...com>
+ *
+ * Copyright (C) 2013 Samsung Electronics
+ * Chanwoo Choi <cw00.choi@...sung.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ */
+
+#ifndef __LINUX_OF_EXTCON_H
+#define __LINUX_OF_EXTCON_H
+
+#if defined(CONFIG_OF)
+extern struct extcon_dev
+ *of_extcon_get_extcon_dev(struct device *dev, int index);
+#else
+static inline struct extcon_dev
+ *of_extcon_get_extcon_dev(struct device *dev, int index);
+{
+ return NULL;
+}
+#endif /* CONFIG_OF */
+
+#endif /* __LINUX_OF_EXTCON_H */
--
1.8.0
--
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