Make sti a bus driver so sti-netlink and sti-console can
register to it.
Signed-off-by: Felipe Balbi <felipe.balbi@xxxxxxxxx>
---
arch/arm/plat-omap/include/mach/sti.h | 57 +++++++++++
drivers/misc/sti/sdti.c | 178 ++++++++++++++++++++++++++++++++-
2 files changed, 234 insertions(+), 1 deletions(-)
diff --git a/arch/arm/plat-omap/include/mach/sti.h b/arch/arm/plat-omap/include/mach/sti.h
index f4cbd8f..da7ca49 100644
--- a/arch/arm/plat-omap/include/mach/sti.h
+++ b/arch/arm/plat-omap/include/mach/sti.h
@@ -1,8 +1,65 @@
#ifndef __ASM_ARCH_OMAP_STI_H
#define __ASM_ARCH_OMAP_STI_H
+#include <linux/device.h>
+#include <linux/bitops.h>
+#include <linux/pm.h>
#include <asm/io.h>
+/* -------------------------------------------------------------------------- */
+
+extern struct bus_type sti_bus_type;
+
+#define STI_NAME_SIZE 20
+
+struct sti_client;
+
+struct sti_driver {
+ int id;
+ unsigned int class;
+ char name[STI_NAME_SIZE];
+
+ int (*probe)(struct sti_client *);
+ int (*remove)(struct sti_client *);
+ void (*shutdown)(struct sti_client *);
+ int (*suspend)(struct sti_client *, pm_message_t mesg);
+ int (*resume)(struct sti_client *);
+
+ struct device_driver driver;
+ struct list_head clients;
+};
+#define to_sti_driver(d) container_of(d, struct sti_driver, driver)
+
+struct sti_client {
+ unsigned short flags; /* div., see below */
+ char name[STI_NAME_SIZE];
+ struct sti_driver *driver; /* and our access routines */
+ struct device dev; /* the device structure */
+ int irq; /* irq issued by device */
+};
+#define to_sti_client(d) container_of(d, struct sti_client, dev)
+
+#define STI_CLIENT_WAKE BIT(0)
+
+static inline void sti_set_clientdata(struct sti_client *client, void *data)
+{
+ dev_set_drvdata(&client->dev, data);
+}
+
+static inline void *sti_get_clientdata(const struct sti_client *client)
+{
+ return dev_get_drvdata(&client->dev);
+}
+
+extern int sti_register_driver(struct module *, struct sti_driver *);
+
+static inline int sti_add_driver(struct sti_driver *driver)
+{
+ return sti_register_driver(THIS_MODULE, driver);
+}
+
+/* -------------------------------------------------------------------------- */
+
/*
* STI/SDTI
*/
diff --git a/drivers/misc/sti/sdti.c b/drivers/misc/sti/sdti.c
index 4f4fcef..7563a67 100644
--- a/drivers/misc/sti/sdti.c
+++ b/drivers/misc/sti/sdti.c
@@ -270,6 +270,173 @@ fail1:
return ret;
}
+#define STI_MODULE_PREFIX "sti:"
+
+static ssize_t sti_name_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct sti_client *client = to_sti_client(dev);
+ return sprintf(buf, "%s\n", client->name);
+}
+
+static ssize_t sti_modalias_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct sti_client *client = to_sti_client(dev);
+ return sprintf(buf, "%s%s\n", STI_MODULE_PREFIX, client->name);
+}
+
+static struct device_attribute sti_dev_attrs[] = {
+ __ATTR(name, S_IRUGO, sti_name_show, NULL),
+ __ATTR(modalias, S_IRUGO, sti_modalias_show, NULL),
+ __ATTR_NULL,
+};
+
+static int sti_dev_match(struct device *dev, struct device_driver *drv)
+{
+ struct sti_client *client = to_sti_client(dev);
+ struct sti_driver *driver = to_sti_driver(drv);
+
+ return !strcmp(client->name, driver->driver.name);
+}
+
+static int sti_dev_uevent(struct device *dev, struct kobj_uevent_env *env)
+{
+ struct sti_client *client = to_sti_client(dev);
+
+ dev_dbg(dev, "uevent\n");
+
+ if (add_uevent_var(env, "MODALIAS=%s%s", STI_MODULE_PREFIX,
+ client->name))
+ return -ENOMEM;
+
+ return 0;
+}
+
+static int sti_dev_probe(struct device *dev)
+{
+ struct sti_driver *driver = to_sti_driver(dev->driver);
+ struct sti_client *client = to_sti_client(dev);
+ int status;
+
+ dev_dbg(dev, "probe\n");
+
+ if (!driver->probe)
+ return -ENODEV;
+
+ client->driver = driver;
+ if (!device_can_wakeup(&client->dev))
+ device_init_wakeup(&client->dev,
+ client->flags & STI_CLIENT_WAKE);
+
+ status = driver->probe(client);
+ if (status)
+ client->driver = NULL;
+
+ return status;
+}
+
+static int sti_dev_remove(struct device *dev)
+{
+ struct sti_client *client = to_sti_client(dev);
+ struct sti_driver *driver;
+ int status;
+
+ dev_dbg(dev, "remove\n");
+
+ if (!dev->driver)
+ return 0;
+
+ driver = to_sti_driver(dev->driver);
+ if (driver->remove) {
+ status = driver->remove(client);
+ } else {
+ dev->driver = NULL;
+ status = 0;
+ }
+
+ if (status == 0)
+ client->driver = NULL;
+
+ return status;
+}
+
+static void sti_dev_shutdown(struct device *dev)
+{
+ struct sti_driver *driver;
+
+ dev_dbg(dev, "shutdown\n");
+
+ if (dev->driver)
+ return;
+
+ driver = to_sti_driver(dev->driver);
+ if (driver->shutdown)
+ driver->shutdown(to_sti_client(dev));
+}
+
+static int sti_dev_suspend(struct device *dev, pm_message_t msg)
+{
+ struct sti_driver *driver;
+
+ if (!dev->driver)
+ return 0;
+
+ driver = to_sti_driver(dev->driver);
+
+ if (!driver->suspend)
+ return 0;
+
+ return driver->suspend(to_sti_client(dev), msg);
+}
+
+static int sti_dev_resume(struct device *dev)
+{
+ struct sti_driver *driver;
+
+ if (!dev->driver)
+ return 0;
+
+ driver = to_sti_driver(dev->driver);
+
+ if (!driver->resume)
+ return 0;
+
+ return driver->resume(to_sti_client(dev));
+}
+
+struct bus_type sti_bus_type = {
+ .name = "sti",
+ .dev_attrs = sti_dev_attrs,
+ .match = sti_dev_match,
+ .uevent = sti_dev_uevent,
+ .probe = sti_dev_probe,
+ .remove = sti_dev_remove,
+ .shutdown = sti_dev_shutdown,
+ .suspend = sti_dev_suspend,
+ .resume = sti_dev_resume,
+};
+EXPORT_SYMBOL_GPL(sti_bus_type);
+
+int sti_register_driver(struct module *owner, struct sti_driver *driver)
+{
+ int status;
+
+ driver->driver.owner = owner;
+ driver->driver.bus = &sti_bus_type;
+
+ status = driver_register(&driver->driver);
+ if (status)
+ return status;
+
+ pr_debug("sti: driver [%s] registered\n", driver->driver.name);
+
+ INIT_LIST_HEAD(&driver->clients);
+
+ return 0;
+}
+EXPORT_SYMBOL(sti_register_driver);
+
static int __devexit omap_sdti_remove(struct platform_device *pdev)
{
struct sti *sti = platform_get_drvdata(pdev);
@@ -294,15 +461,24 @@ static struct platform_driver omap_sdti_driver = {
static int __init omap_sdti_module_init(void)
{
+ int status;
+
+ status = bus_register(&sti_bus_type);
+ if (status)
+ return status;
+
return platform_driver_register(&omap_sdti_driver);
}
+subsys_initcall(omap_sdti_module_init);
static void __exit omap_sdti_module_exit(void)
{
platform_driver_unregister(&omap_sdti_driver);
+ bus_unregister(&sti_bus_type);
}
-subsys_initcall(omap_sdti_module_init);
module_exit(omap_sdti_module_exit);
MODULE_AUTHOR("Roman Tereshonkov");
+MODULE_AUTHOR("Felipe Balbi");
MODULE_LICENSE("GPL");
+
--
1.6.3.1.244.gf9275
--
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