linux-kernel - [PATCH v2 1/1] mcb: Add missing modpost build support

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Message-ID: <20251201160720.28580-2-dev-josejavier.rodriguez@duagon.com>
Date: Mon, 1 Dec 2025 17:07:20 +0100
From: Jose Javier Rodriguez Barbarin <dev-josejavier.rodriguez@...gon.com>
To: andy@...nel.org,
	krzk@...nel.org,
	linus.walleij@...aro.org,
	nathan@...nel.org,
	nsc@...nel.org,
	gregkh@...uxfoundation.org,
	bleung@...omium.org,
	heikki.krogerus@...ux.intel.com,
	abhishekpandit@...omium.org,
	masahiroy@...nel.org,
	legion@...nel.org,
	hughd@...gle.com
CC: linux-kbuild@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Jose Javier Rodriguez Barbarin <dev-josejavier.rodriguez@...gon.com>,
	Jorge Sanjuan Garcia <dev-jorge.sanjuangarcia@...gon.com>
Subject: [PATCH v2 1/1] mcb: Add missing modpost build support

mcb bus is not prepared to autoload client drivers with the data defined on
the drivers' MODULE_DEVICE_TABLE. modpost cannot access to mcb_table_id
inside MODULE_DEVICE_TABLE so the data declared inside is ignored.

Add modpost build support for accessing to the mcb_table_id coded on device
drivers' MODULE_DEVICE_TABLE.

Reviewed-by: Jorge Sanjuan Garcia <dev-jorge.sanjuangarcia@...gon.com>
Signed-off-by: Jose Javier Rodriguez Barbarin <dev-josejavier.rodriguez@...gon.com>
---
 scripts/mod/devicetable-offsets.c | 3 +++
 scripts/mod/file2alias.c          | 9 +++++++++
 2 files changed, 12 insertions(+)

diff --git a/scripts/mod/devicetable-offsets.c b/scripts/mod/devicetable-offsets.c
index d3d00e85edf7..0470ba7c796d 100644
--- a/scripts/mod/devicetable-offsets.c
+++ b/scripts/mod/devicetable-offsets.c
@@ -198,6 +198,9 @@ int main(void)
 	DEVID(cpu_feature);
 	DEVID_FIELD(cpu_feature, feature);
 
+	DEVID(mcb_device_id);
+	DEVID_FIELD(mcb_device_id, device);
+
 	DEVID(mei_cl_device_id);
 	DEVID_FIELD(mei_cl_device_id, name);
 	DEVID_FIELD(mei_cl_device_id, uuid);
diff --git a/scripts/mod/file2alias.c b/scripts/mod/file2alias.c
index b3333560b95e..4e99393a35f1 100644
--- a/scripts/mod/file2alias.c
+++ b/scripts/mod/file2alias.c
@@ -1110,6 +1110,14 @@ static void do_cpu_entry(struct module *mod, void *symval)
 	module_alias_printf(mod, false, "cpu:type:*:feature:*%04X*", feature);
 }
 
+/* Looks like: mcb:16zN */
+static void do_mcb_entry(struct module *mod, void *symval)
+{
+	DEF_FIELD(symval, mcb_device_id, device);
+
+	module_alias_printf(mod, false, "mcb:16z%03d", device);
+}
+
 /* Looks like: mei:S:uuid:N:* */
 static void do_mei_entry(struct module *mod, void *symval)
 {
@@ -1444,6 +1452,7 @@ static const struct devtable devtable[] = {
 	{"mipscdmm", SIZE_mips_cdmm_device_id, do_mips_cdmm_entry},
 	{"x86cpu", SIZE_x86_cpu_id, do_x86cpu_entry},
 	{"cpu", SIZE_cpu_feature, do_cpu_entry},
+	{"mcb", SIZE_mcb_device_id, do_mcb_entry},
 	{"mei", SIZE_mei_cl_device_id, do_mei_entry},
 	{"rapidio", SIZE_rio_device_id, do_rio_entry},
 	{"ulpi", SIZE_ulpi_device_id, do_ulpi_entry},
-- 
2.51.1