1 files changed, 0 insertions, 448 deletions
diff --git a/drivers/pwm/sysfs.c b/drivers/pwm/sysfs.c
deleted file mode 100644
index ceb233dd6048..000000000000
--- a/drivers/pwm/sysfs.c
+++ /dev/null
@@ -1,448 +0,0 @@
-/*
- * A simple sysfs interface for the generic PWM framework
- *
- * Copyright (C) 2013 H Hartley Sweeten <hsweeten@visionengravers.com>
- *
- * Based on previous work by Lars Poeschel <poeschel@lemonage.de>
- *
- * 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, or (at your option)
- * any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- */
-
-#include <linux/device.h>
-#include <linux/mutex.h>
-#include <linux/err.h>
-#include <linux/slab.h>
-#include <linux/kdev_t.h>
-#include <linux/pwm.h>
-
-struct pwm_export {
-	struct device child;
-	struct pwm_device *pwm;
-	struct mutex lock;
-};
-
-static struct pwm_export *child_to_pwm_export(struct device *child)
-{
-	return container_of(child, struct pwm_export, child);
-}
-
-static struct pwm_device *child_to_pwm_device(struct device *child)
-{
-	struct pwm_export *export = child_to_pwm_export(child);
-
-	return export->pwm;
-}
-
-static ssize_t period_show(struct device *child,
-			   struct device_attribute *attr,
-			   char *buf)
-{
-	const struct pwm_device *pwm = child_to_pwm_device(child);
-	struct pwm_state state;
-
-	pwm_get_state(pwm, &state);
-
-	return sprintf(buf, "%u\n", state.period);
-}
-
-static ssize_t period_store(struct device *child,
-			    struct device_attribute *attr,
-			    const char *buf, size_t size)
-{
-	struct pwm_export *export = child_to_pwm_export(child);
-	struct pwm_device *pwm = export->pwm;
-	struct pwm_state state;
-	unsigned int val;
-	int ret;
-
-	ret = kstrtouint(buf, 0, &val);
-	if (ret)
-		return ret;
-
-	mutex_lock(&export->lock);
-	pwm_get_state(pwm, &state);
-	state.period = val;
-	ret = pwm_apply_state(pwm, &state);
-	mutex_unlock(&export->lock);
-
-	return ret ? : size;
-}
-
-static ssize_t duty_cycle_show(struct device *child,
-			       struct device_attribute *attr,
-			       char *buf)
-{
-	const struct pwm_device *pwm = child_to_pwm_device(child);
-	struct pwm_state state;
-
-	pwm_get_state(pwm, &state);
-
-	return sprintf(buf, "%u\n", state.duty_cycle);
-}
-
-static ssize_t duty_cycle_store(struct device *child,
-				struct device_attribute *attr,
-				const char *buf, size_t size)
-{
-	struct pwm_export *export = child_to_pwm_export(child);
-	struct pwm_device *pwm = export->pwm;
-	struct pwm_state state;
-	unsigned int val;
-	int ret;
-
-	ret = kstrtouint(buf, 0, &val);
-	if (ret)
-		return ret;
-
-	mutex_lock(&export->lock);
-	pwm_get_state(pwm, &state);
-	state.duty_cycle = val;
-	ret = pwm_apply_state(pwm, &state);
-	mutex_unlock(&export->lock);
-
-	return ret ? : size;
-}
-
-static ssize_t enable_show(struct device *child,
-			   struct device_attribute *attr,
-			   char *buf)
-{
-	const struct pwm_device *pwm = child_to_pwm_device(child);
-	struct pwm_state state;
-
-	pwm_get_state(pwm, &state);
-
-	return sprintf(buf, "%d\n", state.enabled);
-}
-
-static ssize_t enable_store(struct device *child,
-			    struct device_attribute *attr,
-			    const char *buf, size_t size)
-{
-	struct pwm_export *export = child_to_pwm_export(child);
-	struct pwm_device *pwm = export->pwm;
-	struct pwm_state state;
-	int val, ret;
-
-	ret = kstrtoint(buf, 0, &val);
-	if (ret)
-		return ret;
-
-	mutex_lock(&export->lock);
-
-	pwm_get_state(pwm, &state);
-
-	switch (val) {
-	case 0:
-		state.enabled = false;
-		break;
-	case 1:
-		state.enabled = true;
-		break;
-	default:
-		ret = -EINVAL;
-		goto unlock;
-	}
-
-	ret = pwm_apply_state(pwm, &state);
-
-unlock:
-	mutex_unlock(&export->lock);
-	return ret ? : size;
-}
-
-static ssize_t polarity_show(struct device *child,
-			     struct device_attribute *attr,
-			     char *buf)
-{
-	const struct pwm_device *pwm = child_to_pwm_device(child);
-	const char *polarity = "unknown";
-	struct pwm_state state;
-
-	pwm_get_state(pwm, &state);
-
-	switch (state.polarity) {
-	case PWM_POLARITY_NORMAL:
-		polarity = "normal";
-		break;
-
-	case PWM_POLARITY_INVERSED:
-		polarity = "inversed";
-		break;
-	}
-
-	return sprintf(buf, "%s\n", polarity);
-}
-
-static ssize_t polarity_store(struct device *child,
-			      struct device_attribute *attr,
-			      const char *buf, size_t size)
-{
-	struct pwm_export *export = child_to_pwm_export(child);
-	struct pwm_device *pwm = export->pwm;
-	enum pwm_polarity polarity;
-	struct pwm_state state;
-	int ret;
-
-	if (sysfs_streq(buf, "normal"))
-		polarity = PWM_POLARITY_NORMAL;
-	else if (sysfs_streq(buf, "inversed"))
-		polarity = PWM_POLARITY_INVERSED;
-	else
-		return -EINVAL;
-
-	mutex_lock(&export->lock);
-	pwm_get_state(pwm, &state);
-	state.polarity = polarity;
-	ret = pwm_apply_state(pwm, &state);
-	mutex_unlock(&export->lock);
-
-	return ret ? : size;
-}
-
-static ssize_t capture_show(struct device *child,
-			    struct device_attribute *attr,
-			    char *buf)
-{
-	struct pwm_device *pwm = child_to_pwm_device(child);
-	struct pwm_capture result;
-	int ret;
-
-	ret = pwm_capture(pwm, &result, jiffies_to_msecs(HZ));
-	if (ret)
-		return ret;
-
-	return sprintf(buf, "%u %u\n", result.period, result.duty_cycle);
-}
-
-static DEVICE_ATTR_RW(period);
-static DEVICE_ATTR_RW(duty_cycle);
-static DEVICE_ATTR_RW(enable);
-static DEVICE_ATTR_RW(polarity);
-static DEVICE_ATTR_RO(capture);
-
-static struct attribute *pwm_attrs[] = {
-	&dev_attr_period.attr,
-	&dev_attr_duty_cycle.attr,
-	&dev_attr_enable.attr,
-	&dev_attr_polarity.attr,
-	&dev_attr_capture.attr,
-	NULL
-};
-ATTRIBUTE_GROUPS(pwm);
-
-static void pwm_export_release(struct device *child)
-{
-	struct pwm_export *export = child_to_pwm_export(child);
-
-	kfree(export);
-}
-
-static int pwm_export_child(struct device *parent, struct pwm_device *pwm)
-{
-	struct pwm_export *export;
-	char *pwm_prop[2];
-	int ret;
-
-	if (test_and_set_bit(PWMF_EXPORTED, &pwm->flags))
-		return -EBUSY;
-
-	export = kzalloc(sizeof(*export), GFP_KERNEL);
-	if (!export) {
-		clear_bit(PWMF_EXPORTED, &pwm->flags);
-		return -ENOMEM;
-	}
-
-	export->pwm = pwm;
-	mutex_init(&export->lock);
-
-	export->child.release = pwm_export_release;
-	export->child.parent = parent;
-	export->child.devt = MKDEV(0, 0);
-	export->child.groups = pwm_groups;
-	dev_set_name(&export->child, "pwm%u", pwm->hwpwm);
-
-	ret = device_register(&export->child);
-	if (ret) {
-		clear_bit(PWMF_EXPORTED, &pwm->flags);
-		put_device(&export->child);
-		export = NULL;
-		return ret;
-	}
-	pwm_prop[0] = kasprintf(GFP_KERNEL, "EXPORT=pwm%u", pwm->hwpwm);
-	pwm_prop[1] = NULL;
-	kobject_uevent_env(&parent->kobj, KOBJ_CHANGE, pwm_prop);
-	kfree(pwm_prop[0]);
-
-	return 0;
-}
-
-static int pwm_unexport_match(struct device *child, void *data)
-{
-	return child_to_pwm_device(child) == data;
-}
-
-static int pwm_unexport_child(struct device *parent, struct pwm_device *pwm)
-{
-	struct device *child;
-	char *pwm_prop[2];
-
-	if (!test_and_clear_bit(PWMF_EXPORTED, &pwm->flags))
-		return -ENODEV;
-
-	child = device_find_child(parent, pwm, pwm_unexport_match);
-	if (!child)
-		return -ENODEV;
-
-	pwm_prop[0] = kasprintf(GFP_KERNEL, "UNEXPORT=pwm%u", pwm->hwpwm);
-	pwm_prop[1] = NULL;
-	kobject_uevent_env(&parent->kobj, KOBJ_CHANGE, pwm_prop);
-	kfree(pwm_prop[0]);
-
-	/* for device_find_child() */
-	put_device(child);
-	device_unregister(child);
-	pwm_put(pwm);
-
-	return 0;
-}
-
-static ssize_t export_store(struct device *parent,
-			    struct device_attribute *attr,
-			    const char *buf, size_t len)
-{
-	struct pwm_chip *chip = dev_get_drvdata(parent);
-	struct pwm_device *pwm;
-	unsigned int hwpwm;
-	int ret;
-
-	ret = kstrtouint(buf, 0, &hwpwm);
-	if (ret < 0)
-		return ret;
-
-	if (hwpwm >= chip->npwm)
-		return -ENODEV;
-
-	pwm = pwm_request_from_chip(chip, hwpwm, "sysfs");
-	if (IS_ERR(pwm))
-		return PTR_ERR(pwm);
-
-	ret = pwm_export_child(parent, pwm);
-	if (ret < 0)
-		pwm_put(pwm);
-
-	return ret ? : len;
-}
-static DEVICE_ATTR_WO(export);
-
-static ssize_t unexport_store(struct device *parent,
-			      struct device_attribute *attr,
-			      const char *buf, size_t len)
-{
-	struct pwm_chip *chip = dev_get_drvdata(parent);
-	unsigned int hwpwm;
-	int ret;
-
-	ret = kstrtouint(buf, 0, &hwpwm);
-	if (ret < 0)
-		return ret;
-
-	if (hwpwm >= chip->npwm)
-		return -ENODEV;
-
-	ret = pwm_unexport_child(parent, &chip->pwms[hwpwm]);
-
-	return ret ? : len;
-}
-static DEVICE_ATTR_WO(unexport);
-
-static ssize_t npwm_show(struct device *parent, struct device_attribute *attr,
-			 char *buf)
-{
-	const struct pwm_chip *chip = dev_get_drvdata(parent);
-
-	return sprintf(buf, "%u\n", chip->npwm);
-}
-static DEVICE_ATTR_RO(npwm);
-
-static struct attribute *pwm_chip_attrs[] = {
-	&dev_attr_export.attr,
-	&dev_attr_unexport.attr,
-	&dev_attr_npwm.attr,
-	NULL,
-};
-ATTRIBUTE_GROUPS(pwm_chip);
-
-static struct class pwm_class = {
-	.name = "pwm",
-	.owner = THIS_MODULE,
-	.dev_groups = pwm_chip_groups,
-};
-
-static int pwmchip_sysfs_match(struct device *parent, const void *data)
-{
-	return dev_get_drvdata(parent) == data;
-}
-
-void pwmchip_sysfs_export(struct pwm_chip *chip)
-{
-	struct device *parent;
-
-	/*
-	 * If device_create() fails the pwm_chip is still usable by
-	 * the kernel its just not exported.
-	 */
-	parent = device_create(&pwm_class, chip->dev, MKDEV(0, 0), chip,
-			       "pwmchip%d", chip->base);
-	if (IS_ERR(parent)) {
-		dev_warn(chip->dev,
-			 "device_create failed for pwm_chip sysfs export\n");
-	}
-}
-
-void pwmchip_sysfs_unexport(struct pwm_chip *chip)
-{
-	struct device *parent;
-
-	parent = class_find_device(&pwm_class, NULL, chip,
-				   pwmchip_sysfs_match);
-	if (parent) {
-		/* for class_find_device() */
-		put_device(parent);
-		device_unregister(parent);
-	}
-}
-
-void pwmchip_sysfs_unexport_children(struct pwm_chip *chip)
-{
-	struct device *parent;
-	unsigned int i;
-
-	parent = class_find_device(&pwm_class, NULL, chip,
-				   pwmchip_sysfs_match);
-	if (!parent)
-		return;
-
-	for (i = 0; i < chip->npwm; i++) {
-		struct pwm_device *pwm = &chip->pwms[i];
-
-		if (test_bit(PWMF_EXPORTED, &pwm->flags))
-			pwm_unexport_child(parent, pwm);
-	}
-
-	put_device(parent);
-}
-
-static int __init pwm_sysfs_init(void)
-{
-	return class_register(&pwm_class);
-}
-subsys_initcall(pwm_sysfs_init);