[PATCH v4 4/5] staging: vchiq: Make creation of vchiq cdev optional
From: Ojaswin Mujoo <hidden>
Date: 2021-07-21 16:21:56
Also in:
linux-staging, lkml
Subsystem:
staging subsystem, the rest · Maintainers:
Greg Kroah-Hartman, Linus Torvalds
Before this commit, vchiq cdev (/dev/vchiq) was always created during platform initialization. Introduce a new Kconfig option CONFIG_VCHIQ_CDEV which determines if the cdev will be created or not. Signed-off-by: Ojaswin Mujoo <redacted> --- drivers/staging/vc04_services/Kconfig | 10 ++++++++++ drivers/staging/vc04_services/Makefile | 5 ++++- .../vc04_services/interface/vchiq_arm/vchiq_arm.h | 9 +++++++++ 3 files changed, 23 insertions(+), 1 deletion(-)
diff --git a/drivers/staging/vc04_services/Kconfig b/drivers/staging/vc04_services/Kconfig
index 4b886293f198..63caa6818d37 100644
--- a/drivers/staging/vc04_services/Kconfig
+++ b/drivers/staging/vc04_services/Kconfig@@ -19,6 +19,16 @@ config BCM2835_VCHIQ Defaults to Y when the Broadcom Videocore services are included in the build, N otherwise. +if BCM2835_VCHIQ + +config VCHIQ_CDEV + bool "VCHIQ Character Driver" + help + Enable the creation of VCHIQ character driver to help + communicate with the Videocore platform. + +endif + source "drivers/staging/vc04_services/bcm2835-audio/Kconfig" source "drivers/staging/vc04_services/bcm2835-camera/Kconfig"
diff --git a/drivers/staging/vc04_services/Makefile b/drivers/staging/vc04_services/Makefile
index db28be341239..0a04338fc962 100644
--- a/drivers/staging/vc04_services/Makefile
+++ b/drivers/staging/vc04_services/Makefile@@ -7,7 +7,10 @@ vchiq-objs := \ interface/vchiq_arm/vchiq_2835_arm.o \ interface/vchiq_arm/vchiq_debugfs.o \ interface/vchiq_arm/vchiq_connected.o \ - interface/vchiq_arm/vchiq_dev.o \ + +ifdef CONFIG_VCHIQ_CDEV +vchiq-objs += interface/vchiq_arm/vchiq_dev.o +endif obj-$(CONFIG_SND_BCM2835) += bcm2835-audio/ obj-$(CONFIG_VIDEO_BCM2835) += bcm2835-camera/
diff --git a/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_arm.h b/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_arm.h
index 2453971b6b78..e8e39a154c74 100644
--- a/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_arm.h
+++ b/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_arm.h@@ -174,12 +174,21 @@ vchiq_instance_get_trace(struct vchiq_instance *instance); extern void vchiq_instance_set_trace(struct vchiq_instance *instance, int trace); +#if IS_ENABLED(CONFIG_VCHIQ_CDEV) + extern void vchiq_deregister_chrdev(void); extern int vchiq_register_chrdev(struct device *parent); +#else + +static inline void vchiq_deregister_chrdev(void) { } +static inline int vchiq_register_chrdev(struct device *parent) { return 0; } + +#endif /* IS_ENABLED(CONFIG_VCHIQ_CDEV) */ + extern enum vchiq_status service_callback(enum vchiq_reason reason, struct vchiq_header *header, unsigned int handle, void *bulk_userdata);
--
2.25.1
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