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-rw-r--r--compat/compat-3.5.c167
1 files changed, 167 insertions, 0 deletions
diff --git a/compat/compat-3.5.c b/compat/compat-3.5.c
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index 0000000..de31228
--- /dev/null
+++ b/compat/compat-3.5.c
@@ -0,0 +1,167 @@
+/*
+ * Copyright 2012-2013 Luis R. Rodriguez <mcgrof@do-not-panic.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * Backport functionality introduced in Linux 3.5.
+ */
+
+#include <linux/module.h>
+#include <linux/highuid.h>
+#include <linux/ktime.h>
+#include <linux/hrtimer.h>
+#include <linux/gpio.h>
+#include <linux/ptp_clock_kernel.h>
+
+#if LINUX_VERSION_IS_GEQ(3,2,0)
+#include <linux/device.h>
+
+/**
+ * devres_release - Find a device resource and destroy it, calling release
+ * @dev: Device to find resource from
+ * @release: Look for resources associated with this release function
+ * @match: Match function (optional)
+ * @match_data: Data for the match function
+ *
+ * Find the latest devres of @dev associated with @release and for
+ * which @match returns 1. If @match is NULL, it's considered to
+ * match all. If found, the resource is removed atomically, the
+ * release function called and the resource freed.
+ *
+ * RETURNS:
+ * 0 if devres is found and freed, -ENOENT if not found.
+ */
+int devres_release(struct device *dev, dr_release_t release,
+ dr_match_t match, void *match_data)
+{
+ void *res;
+
+ res = devres_remove(dev, release, match, match_data);
+ if (unlikely(!res))
+ return -ENOENT;
+
+ (*release)(dev, res);
+ devres_free(res);
+ return 0;
+}
+EXPORT_SYMBOL_GPL(devres_release);
+#endif /* LINUX_VERSION_IS_GEQ(3,2,0) */
+
+/*
+ * Commit 7a4e7408c5cadb240e068a662251754a562355e3
+ * exported overflowuid and overflowgid for all
+ * kernel configurations, prior to that we only
+ * had it exported when CONFIG_UID16 was enabled.
+ * We are technically redefining it here but
+ * nothing seems to be changing it, except
+ * kernel/ code does epose it via sysctl and
+ * proc... if required later we can add that here.
+ */
+#ifndef CONFIG_UID16
+int overflowuid = DEFAULT_OVERFLOWUID;
+int overflowgid = DEFAULT_OVERFLOWGID;
+
+EXPORT_SYMBOL_GPL(overflowuid);
+EXPORT_SYMBOL_GPL(overflowgid);
+#endif
+
+#if IS_ENABLED(CONFIG_PTP_1588_CLOCK)
+int ptp_clock_index(struct ptp_clock *ptp)
+{
+ return ptp->index;
+}
+EXPORT_SYMBOL(ptp_clock_index);
+#endif /* CONFIG_PTP_1588_CLOCK */
+
+#ifdef CONFIG_GPIOLIB
+static void devm_gpio_release(struct device *dev, void *res)
+{
+ unsigned *gpio = res;
+
+ gpio_free(*gpio);
+}
+
+/**
+ * devm_gpio_request - request a GPIO for a managed device
+ * @dev: device to request the GPIO for
+ * @gpio: GPIO to allocate
+ * @label: the name of the requested GPIO
+ *
+ * Except for the extra @dev argument, this function takes the
+ * same arguments and performs the same function as
+ * gpio_request(). GPIOs requested with this function will be
+ * automatically freed on driver detach.
+ *
+ * If an GPIO allocated with this function needs to be freed
+ * separately, devm_gpio_free() must be used.
+ */
+
+int devm_gpio_request(struct device *dev, unsigned gpio, const char *label)
+{
+ unsigned *dr;
+ int rc;
+
+ dr = devres_alloc(devm_gpio_release, sizeof(unsigned), GFP_KERNEL);
+ if (!dr)
+ return -ENOMEM;
+
+ rc = gpio_request(gpio, label);
+ if (rc) {
+ devres_free(dr);
+ return rc;
+ }
+
+ *dr = gpio;
+ devres_add(dev, dr);
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(devm_gpio_request);
+
+/**
+ * devm_gpio_request_one - request a single GPIO with initial setup
+ * @dev: device to request for
+ * @gpio: the GPIO number
+ * @flags: GPIO configuration as specified by GPIOF_*
+ * @label: a literal description string of this GPIO
+ */
+int devm_gpio_request_one(struct device *dev, unsigned gpio,
+ unsigned long flags, const char *label)
+{
+ unsigned *dr;
+ int rc;
+
+ dr = devres_alloc(devm_gpio_release, sizeof(unsigned), GFP_KERNEL);
+ if (!dr)
+ return -ENOMEM;
+
+ rc = gpio_request_one(gpio, flags, label);
+ if (rc) {
+ devres_free(dr);
+ return rc;
+ }
+
+ *dr = gpio;
+ devres_add(dev, dr);
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(devm_gpio_request_one);
+
+static int devm_gpio_match(struct device *dev, void *res, void *data)
+{
+ unsigned *this = res, *gpio = data;
+
+ return *this == *gpio;
+}
+
+void devm_gpio_free(struct device *dev, unsigned int gpio)
+{
+ WARN_ON(devres_destroy(dev, devm_gpio_release, devm_gpio_match,
+ &gpio));
+ gpio_free(gpio);
+}
+EXPORT_SYMBOL_GPL(devm_gpio_free);
+#endif /* CONFIG_GPIOLIB */