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authorDavid Brownell <dbrownell@users.sourceforge.net>2009-03-26 03:42:41 -0400
committerDavid Woodhouse <David.Woodhouse@intel.com>2009-04-04 09:29:07 -0400
commit1f24b5a8ecbb2a3c7080f418974d40e3ffedb221 (patch)
tree07dfc44f62dac78bdf4a8cdb4d91d60f73c04ff4 /include/linux/mtd/mtd.h
parent9d63287a461c269edb39941744f4ff22223cf349 (diff)
[MTD] driver model updates
Update driver model support in the MTD framework, so it fits better into the current udev-based hotplug framework: - Each mtd_info now has a device node. MTD drivers should set the dev.parent field to point to the physical device, before setting up partitions or otherwise declaring MTDs. - Those device nodes always map to /sys/class/mtdX device nodes, which no longer depend on MTD_CHARDEV. - Those mtdX sysfs nodes have a "starter set" of attributes; it's not yet sufficient to replace /proc/mtd. - Enabling MTD_CHARDEV provides /sys/class/mtdXro/ nodes and the /sys/class/mtd*/dev attributes (for udev, mdev, etc). - Include a MODULE_ALIAS_CHARDEV_MAJOR macro. It'll work with udev creating the /dev/mtd* nodes, not just a static rootfs. So the sysfs structure is pretty much what you'd expect, except that readonly chardev nodes are a bit quirky. Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
Diffstat (limited to 'include/linux/mtd/mtd.h')
-rw-r--r--include/linux/mtd/mtd.h7
1 files changed, 7 insertions, 0 deletions
diff --git a/include/linux/mtd/mtd.h b/include/linux/mtd/mtd.h
index 0c079fd307a5..5675b63a0631 100644
--- a/include/linux/mtd/mtd.h
+++ b/include/linux/mtd/mtd.h
@@ -11,6 +11,7 @@
11#include <linux/module.h> 11#include <linux/module.h>
12#include <linux/uio.h> 12#include <linux/uio.h>
13#include <linux/notifier.h> 13#include <linux/notifier.h>
14#include <linux/device.h>
14 15
15#include <linux/mtd/compatmac.h> 16#include <linux/mtd/compatmac.h>
16#include <mtd/mtd-abi.h> 17#include <mtd/mtd-abi.h>
@@ -237,6 +238,7 @@ struct mtd_info {
237 void *priv; 238 void *priv;
238 239
239 struct module *owner; 240 struct module *owner;
241 struct device dev;
240 int usecount; 242 int usecount;
241 243
242 /* If the driver is something smart, like UBI, it may need to maintain 244 /* If the driver is something smart, like UBI, it may need to maintain
@@ -247,6 +249,11 @@ struct mtd_info {
247 void (*put_device) (struct mtd_info *mtd); 249 void (*put_device) (struct mtd_info *mtd);
248}; 250};
249 251
252static inline struct mtd_info *dev_to_mtd(struct device *dev)
253{
254 return dev ? container_of(dev, struct mtd_info, dev) : NULL;
255}
256
250static inline uint32_t mtd_div_by_eb(uint64_t sz, struct mtd_info *mtd) 257static inline uint32_t mtd_div_by_eb(uint64_t sz, struct mtd_info *mtd)
251{ 258{
252 if (mtd->erasesize_shift) 259 if (mtd->erasesize_shift)