lk/linux-kernel-test
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

spi: add support for device table matching

Browse Source 
With this patch spi drivers can use standard spi_driver.id_table and
MODULE_DEVICE_TABLE() mechanisms to bind against the devices.  Just like
we do with I2C drivers.

This is useful when a single driver supports several variants of devices
but it is not possible to detect them in run-time (like non-JEDEC chips
probing in drivers/mtd/devices/m25p80.c), and when platform_data usage is
overkill.

This patch also makes life a lot easier on OpenFirmware platforms, since
with OF we extensively use proper device IDs in modaliases.

Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com>
Cc: David Brownell <dbrownell@users.sourceforge.net>
Cc: David Woodhouse <dwmw2@infradead.org>
Cc: Grant Likely <grant.likely@secretlab.ca>
Cc: Jean Delvare <khali@linux-fr.org>
Cc: Ben Dooks <ben-linux@fluff.org>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Anton Vorontsov
2009-09-22 16:46:04 -07:00
committed by Linus Torvalds
parent b5f3294f0b
commit 75368bf6c2
4 changed files with 54 additions and 2 deletions
Download Patch File Download Diff File Expand all files Collapse all files

13
scripts/mod/file2alias.c
View File

@ -657,6 +657,15 @@ static int do_i2c_entry(const char *filename, struct i2c_device_id *id,
return 1;
}
/* Looks like: S */
static int do_spi_entry(const char *filename, struct spi_device_id *id,
char *alias)
{
sprintf(alias, "%s", id->name);
return 1;
}
static const struct dmifield {
const char *prefix;
int field;
@ -853,6 +862,10 @@ void handle_moddevtable(struct module *mod, struct elf_info *info,
do_table(symval, sym->st_size,
sizeof(struct i2c_device_id), "i2c",
do_i2c_entry, mod);
else if (sym_is(symname, "__mod_spi_device_table"))
do_table(symval, sym->st_size,
sizeof(struct spi_device_id), "spi",
do_spi_entry, mod);
else if (sym_is(symname, "__mod_dmi_device_table"))
do_table(symval, sym->st_size,
sizeof(struct dmi_system_id), "dmi",