From: Kishon Vijay Abraham I <kishon@xxxxxx> 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@xxxxxx> Signed-off-by: Chanwoo Choi <cw00.choi@xxxxxxxxxxx> Signed-off-by: Myungjoo Ham <myungjoo.ham@xxxxxxxxxxx> --- 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@xxxxxx> + * + * Copyright (C) 2013 Samsung Electronics + * Chanwoo Choi <cw00.choi@xxxxxxxxxxx> + * + * 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@xxxxxx> + * + * Copyright (C) 2013 Samsung Electronics + * Chanwoo Choi <cw00.choi@xxxxxxxxxxx> + * + * 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 -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html