linux-kernel - [PATCH 1/2] mcb: Add missing modpost build support

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Message-ID: <20251127155452.42660-2-dev-josejavier.rodriguez@duagon.com>
Date: Thu, 27 Nov 2025 16:54:51 +0100
From: Jose Javier Rodriguez Barbarin <dev-josejavier.rodriguez@...gon.com>
To: linus.walleij@...aro.org,
	brgl@...nel.org,
	jic23@...nel.org,
	dlechner@...libre.com,
	nuno.sa@...log.com,
	andy@...nel.org,
	gregkh@...uxfoundation.org,
	jirislaby@...nel.org,
	morbidrsa@...il.com,
	jth@...nel.org,
	wim@...ux-watchdog.org,
	linux@...ck-us.net,
	nathan@...nel.org,
	nsc@...nel.org
CC: linux-gpio@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	linux-iio@...r.kernel.org,
	linux-serial@...r.kernel.org,
	linux-watchdog@...r.kernel.org,
	linux-kbuild@...r.kernel.org,
	Jose Javier Rodriguez Barbarin <dev-josejavier.rodriguez@...gon.com>,
	Jorge Sanjuan Garcia <dev-jorge.sanjuangarcia@...gon.com>
Subject: [PATCH 1/2] 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..8e89d07a9337 100644
--- a/scripts/mod/devicetable-offsets.c
+++ b/scripts/mod/devicetable-offsets.c
@@ -209,6 +209,9 @@ int main(void)
 	DEVID_FIELD(rio_device_id, asm_did);
 	DEVID_FIELD(rio_device_id, asm_vid);
 
+	DEVID(mcb_device_id);
+	DEVID_FIELD(mcb_device_id, device);
+
 	DEVID(ulpi_device_id);
 	DEVID_FIELD(ulpi_device_id, vendor);
 	DEVID_FIELD(ulpi_device_id, product);
diff --git a/scripts/mod/file2alias.c b/scripts/mod/file2alias.c
index b3333560b95e..f02dfc186730 100644
--- a/scripts/mod/file2alias.c
+++ b/scripts/mod/file2alias.c
@@ -1144,6 +1144,14 @@ static void do_rio_entry(struct module *mod, void *symval)
 	module_alias_printf(mod, true, "rapidio:%s", alias);
 }
 
+/* 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: ulpi:vNpN */
 static void do_ulpi_entry(struct module *mod, void *symval)
 {
@@ -1446,6 +1454,7 @@ static const struct devtable devtable[] = {
 	{"cpu", SIZE_cpu_feature, do_cpu_entry},
 	{"mei", SIZE_mei_cl_device_id, do_mei_entry},
 	{"rapidio", SIZE_rio_device_id, do_rio_entry},
+	{"mcb", SIZE_mcb_device_id, do_mcb_entry},
 	{"ulpi", SIZE_ulpi_device_id, do_ulpi_entry},
 	{"hdaudio", SIZE_hda_device_id, do_hda_entry},
 	{"sdw", SIZE_sdw_device_id, do_sdw_entry},
-- 
2.51.1