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authorUmang Jain <umang.jain@ideasonboard.com>2023-10-19 14:31:26 +0530
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2023-10-21 11:56:26 +0200
commit1fa05877588a02fdad995385eaafea4798022cd4 (patch)
tree73f60798327d6681ee2752e483af448c8d675812 /scripts
parent75fd2810b08a4854af3928121a301e50376288d2 (diff)
staging: vc04_services: Support module autoloading using MODULE_DEVICE_TABLE
VC04 has now a independent bus vchiq_bus to register its devices. However, the module auto-loading for bcm2835-audio and bcm2835-camera currently happens through MODULE_ALIAS() macro specified explicitly. The correct way to auto-load a module, is when the alias is picked out from MODULE_DEVICE_TABLE(). In order to get there, we need to introduce vchiq_device_id and add relevant entries in file2alias.c infrastructure so that aliases can be generated. This patch targets adding vchiq_device_id and do_vchiq_entry, in order to generate those alias using the /script/mod/file2alias.c. Going forward the MODULE_ALIAS() from bcm2835-camera and bcm2835-audio will be dropped, in favour of MODULE_DEVICE_TABLE being used there. The alias format for vchiq_bus devices will be "vchiq:<dev_name>". Adjust the vchiq_bus_uevent() to reflect that. Signed-off-by: Umang Jain <umang.jain@ideasonboard.com> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com> Link: https://lore.kernel.org/r/20231019090128.430297-2-umang.jain@ideasonboard.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'scripts')
-rw-r--r--scripts/mod/devicetable-offsets.c3
-rw-r--r--scripts/mod/file2alias.c9
2 files changed, 12 insertions, 0 deletions
diff --git a/scripts/mod/devicetable-offsets.c b/scripts/mod/devicetable-offsets.c
index abe65f8968dd..e8aadc780da5 100644
--- a/scripts/mod/devicetable-offsets.c
+++ b/scripts/mod/devicetable-offsets.c
@@ -267,5 +267,8 @@ int main(void)
DEVID_FIELD(cdx_device_id, device);
DEVID_FIELD(cdx_device_id, override_only);
+ DEVID(vchiq_device_id);
+ DEVID_FIELD(vchiq_device_id, name);
+
return 0;
}
diff --git a/scripts/mod/file2alias.c b/scripts/mod/file2alias.c
index 38120f932b0d..78dfae5a8720 100644
--- a/scripts/mod/file2alias.c
+++ b/scripts/mod/file2alias.c
@@ -1478,6 +1478,14 @@ static int do_cdx_entry(const char *filename, void *symval,
return 1;
}
+static int do_vchiq_entry(const char *filename, void *symval, char *alias)
+{
+ DEF_FIELD_ADDR(symval, vchiq_device_id, name);
+ sprintf(alias, "vchiq:%s", *name);
+
+ return 1;
+}
+
/* Does namelen bytes of name exactly match the symbol? */
static bool sym_is(const char *name, unsigned namelen, const char *symbol)
{
@@ -1558,6 +1566,7 @@ static const struct devtable devtable[] = {
{"dfl", SIZE_dfl_device_id, do_dfl_entry},
{"ishtp", SIZE_ishtp_device_id, do_ishtp_entry},
{"cdx", SIZE_cdx_device_id, do_cdx_entry},
+ {"vchiq", SIZE_vchiq_device_id, do_vchiq_entry},
};
/* Create MODULE_ALIAS() statements.