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authorEric Miao <eric.miao@marvell.com>2009-02-03 22:52:40 -0500
committerGreg Kroah-Hartman <gregkh@suse.de>2009-03-24 19:38:24 -0400
commit57fee4a58fe802272742caae248872c392a60670 (patch)
treea3cd02fb3c1decb829c520d1a5319bef0ce7bd27 /scripts/mod
parent71b3e0c1ad90f28e34c105069175cbd4edb43dfa (diff)
platform: introduce module id table for platform devices
Now platform_device is being widely used on SoC processors where the peripherals are attached to the system bus, which is simple enough. However, silicon IPs for these SoCs are usually shared heavily across a family of processors, even products from different companies. This makes the original simple driver name based matching insufficient, or simply not straight-forward. Introduce a module id table for platform devices, and makes it clear that a platform driver is able to support some shared IP and handle slight differences across different platforms (by 'driver_data'). Module alias is handled automatically when a MODULE_DEVICE_TABLE() is defined. To not disturb the current platform drivers too much, the matched id entry is recorded and can be retrieved by platform_get_device_id(). Signed-off-by: Eric Miao <eric.miao@marvell.com> Cc: Kay Sievers <kay.sievers@vrfy.org> Cc: Ben Dooks <ben-linux@fluff.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'scripts/mod')
-rw-r--r--scripts/mod/file2alias.c12
1 files changed, 12 insertions, 0 deletions
diff --git a/scripts/mod/file2alias.c b/scripts/mod/file2alias.c
index 4eea60b1693e..a3344285ccf4 100644
--- a/scripts/mod/file2alias.c
+++ b/scripts/mod/file2alias.c
@@ -710,6 +710,14 @@ static int do_dmi_entry(const char *filename, struct dmi_system_id *id,
710 strcat(alias, ":"); 710 strcat(alias, ":");
711 return 1; 711 return 1;
712} 712}
713
714static int do_platform_entry(const char *filename,
715 struct platform_device_id *id, char *alias)
716{
717 sprintf(alias, PLATFORM_MODULE_PREFIX "%s", id->name);
718 return 1;
719}
720
713/* Ignore any prefix, eg. some architectures prepend _ */ 721/* Ignore any prefix, eg. some architectures prepend _ */
714static inline int sym_is(const char *symbol, const char *name) 722static inline int sym_is(const char *symbol, const char *name)
715{ 723{
@@ -849,6 +857,10 @@ void handle_moddevtable(struct module *mod, struct elf_info *info,
849 do_table(symval, sym->st_size, 857 do_table(symval, sym->st_size,
850 sizeof(struct dmi_system_id), "dmi", 858 sizeof(struct dmi_system_id), "dmi",
851 do_dmi_entry, mod); 859 do_dmi_entry, mod);
860 else if (sym_is(symname, "__mod_platform_device_table"))
861 do_table(symval, sym->st_size,
862 sizeof(struct platform_device_id), "platform",
863 do_platform_entry, mod);
852 free(zeros); 864 free(zeros);
853} 865}
854 866