diff options
author | David Brownell <dbrownell@users.sourceforge.net> | 2009-03-26 03:42:41 -0400 |
---|---|---|
committer | David Woodhouse <David.Woodhouse@intel.com> | 2009-04-04 09:29:07 -0400 |
commit | 1f24b5a8ecbb2a3c7080f418974d40e3ffedb221 (patch) | |
tree | 07dfc44f62dac78bdf4a8cdb4d91d60f73c04ff4 /include/linux/mtd/mtd.h | |
parent | 9d63287a461c269edb39941744f4ff22223cf349 (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.h | 7 |
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 | ||
252 | static inline struct mtd_info *dev_to_mtd(struct device *dev) | ||
253 | { | ||
254 | return dev ? container_of(dev, struct mtd_info, dev) : NULL; | ||
255 | } | ||
256 | |||
250 | static inline uint32_t mtd_div_by_eb(uint64_t sz, struct mtd_info *mtd) | 257 | static 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) |