From 57fee4a58fe802272742caae248872c392a60670 Mon Sep 17 00:00:00 2001 From: Eric Miao Date: Wed, 4 Feb 2009 11:52:40 +0800 Subject: 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 Cc: Kay Sievers Cc: Ben Dooks Signed-off-by: Greg Kroah-Hartman --- scripts/mod/file2alias.c | 12 ++++++++++++ 1 file changed, 12 insertions(+) (limited to 'scripts/mod') 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, strcat(alias, ":"); return 1; } + +static int do_platform_entry(const char *filename, + struct platform_device_id *id, char *alias) +{ + sprintf(alias, PLATFORM_MODULE_PREFIX "%s", id->name); + return 1; +} + /* Ignore any prefix, eg. some architectures prepend _ */ static inline int sym_is(const char *symbol, const char *name) { @@ -849,6 +857,10 @@ void handle_moddevtable(struct module *mod, struct elf_info *info, do_table(symval, sym->st_size, sizeof(struct dmi_system_id), "dmi", do_dmi_entry, mod); + else if (sym_is(symname, "__mod_platform_device_table")) + do_table(symval, sym->st_size, + sizeof(struct platform_device_id), "platform", + do_platform_entry, mod); free(zeros); } -- cgit v1.2.3 From 8c8ef42aee8fcfb4128bb94c50d55c9f80ade525 Mon Sep 17 00:00:00 2001 From: Rusty Russell Date: Tue, 31 Mar 2009 13:05:34 -0600 Subject: module: include other structures in module version check With CONFIG_MODVERSIONS, we version 'struct module' using a dummy export, but other things matter too: 1) 'struct modversion_info' determines the layout of the __versions section, 2) 'struct kernel_param' determines the layout of the __params section, 3) 'struct kernel_symbol' determines __ksymtab*. 4) 'struct marker' determines __markers. 5) 'struct tracepoint' determines __tracepoints. So we rename 'struct_module' to 'module_layout' and include these in the signature. Now it's general we can add others later on without confusion. Signed-off-by: Rusty Russell --- scripts/mod/modpost.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) (limited to 'scripts/mod') diff --git a/scripts/mod/modpost.c b/scripts/mod/modpost.c index 7e62303133dc..8cc70612984c 100644 --- a/scripts/mod/modpost.c +++ b/scripts/mod/modpost.c @@ -1607,12 +1607,12 @@ static void read_symbols(char *modname) parse_elf_finish(&info); - /* Our trick to get versioning for struct_module - it's + /* Our trick to get versioning for module struct etc. - it's * never passed as an argument to an exported function, so * the automatic versioning doesn't pick it up, but it's really * important anyhow */ if (modversions) - mod->unres = alloc_symbol("struct_module", 0, mod->unres); + mod->unres = alloc_symbol("module_layout", 0, mod->unres); } #define SZ 500 -- cgit v1.2.3