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staging: vchiq: Make creation of vchiq cdev optional

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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.

Reviewed-by: Stefan Wahren <stefan.wahren@i2se.com>
Signed-off-by: Ojaswin Mujoo <ojaswin98@gmail.com>
Link: https://lore.kernel.org/r/846c424dd4aae14d1cc28c8f30877a06e2b7dd10.1626882325.git.ojaswin98@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Ojaswin Mujoo 2021-07-21 21:50:52 +05:30 committed by Greg Kroah-Hartman
parent f05916281f
commit 2b5930fb3d
3 changed files with 23 additions and 1 deletions
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10
drivers/staging/vc04_services/Kconfig
View File

@ -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"

5
drivers/staging/vc04_services/Makefile
View File

@ -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/

9
drivers/staging/vc04_services/interface/vchiq_arm/vchiq_arm.h
View File

@ -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);