platform/chrome: cros_ec_proto: Allow to build as module

Allow to build ChromeOS EC communication protocol helpers as
kernel module which is particularly useful for Android GKI (Generic
Kernel Image) configuration. With this change the ChromeOS Platform
(CONFIG_CHROME_PLATFORMS=y) can be enabled directly from the vendor
kconfig fragment whithout additional configuration in gki_defconfig.

Signed-off-by: Slawomir Rosek <srosek@chromium.org>
Link: https://lore.kernel.org/r/20250328132612.511471-1-srosek@chromium.org
Signed-off-by: Tzung-Bi Shih <tzungbi@kernel.org>

diff --git a/drivers/platform/chrome/Kconfig b/drivers/platform/chrome/Kconfig
index 1b2f2bd096622f985ac223dc70dde0a8f3a6cb89..f523ae3d3be040390392f67cff9fc245ce698daf 100644 (file)
--- a/drivers/platform/chrome/Kconfig
+++ b/drivers/platform/chrome/Kconfig
@@ -155,7 +155,7 @@ config CROS_EC_LPC
          module will be called cros_ec_lpcs.
 
 config CROS_EC_PROTO
-       bool
+       tristate
        help
          ChromeOS EC communication protocol helpers.
 

diff --git a/drivers/platform/chrome/Makefile b/drivers/platform/chrome/Makefile
index 1a5a484563cc1300c6d20f08d6fc127a9a6b3e34..b981a1bb5bd807382d468b556d6698808bf64a02 100644 (file)
--- a/drivers/platform/chrome/Makefile
+++ b/drivers/platform/chrome/Makefile
@@ -25,7 +25,8 @@ endif
 obj-$(CONFIG_CROS_EC_TYPEC)            += cros-ec-typec.o
 
 obj-$(CONFIG_CROS_EC_LPC)              += cros_ec_lpcs.o
-obj-$(CONFIG_CROS_EC_PROTO)            += cros_ec_proto.o cros_ec_trace.o
+cros-ec-proto-objs                     := cros_ec_proto.o cros_ec_trace.o
+obj-$(CONFIG_CROS_EC_PROTO)            += cros-ec-proto.o
 obj-$(CONFIG_CROS_KBD_LED_BACKLIGHT)   += cros_kbd_led_backlight.o
 obj-$(CONFIG_CROS_EC_CHARDEV)          += cros_ec_chardev.o
 obj-$(CONFIG_CROS_EC_LIGHTBAR)         += cros_ec_lightbar.o

diff --git a/drivers/platform/chrome/cros_ec_proto.c b/drivers/platform/chrome/cros_ec_proto.c
index 586358fbf9819d539b21fbe947bced6c42e5991e..3e94a0a82173dbedef8807d18c65ece87ab820d1 100644 (file)
--- a/drivers/platform/chrome/cros_ec_proto.c
+++ b/drivers/platform/chrome/cros_ec_proto.c
@@ -1152,3 +1152,6 @@ int cros_ec_get_cmd_versions(struct cros_ec_device *ec_dev, u16 cmd)
                return resp.version_mask;
 }
 EXPORT_SYMBOL_GPL(cros_ec_get_cmd_versions);
+
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("ChromeOS EC communication protocol helpers");