linux-kernel.vger.kernel.org archive mirror
 help / color / mirror / Atom feed
From: Ojaswin Mujoo <ojaswin98@gmail.com>
To: nsaenz@kernel.org
Cc: gregkh@linuxfoundation.org, stefan.wahren@i2se.com,
	arnd@arndb.de, dan.carpenter@oracle.com, phil@raspberrypi.com,
	bcm-kernel-feedback-list@broadcom.com,
	linux-arm-kernel@lists.infradead.org,
	linux-staging@lists.linux.dev, linux-kernel@vger.kernel.org
Subject: [PATCH v3 4/5] staging: vchiq: Make creation of vchiq cdev optional
Date: Sun, 4 Jul 2021 21:29:16 +0530	[thread overview]
Message-ID: <03cbe3fc1d9d7dbf9b0a3844b700eb9bf5459088.1625401928.git.ojaswin98@gmail.com> (raw)
In-Reply-To: <cover.1625401927.git.ojaswin98@gmail.com>

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 <ojaswin98@gmail.com>
---
 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


  parent reply	other threads:[~2021-07-04 15:59 UTC|newest]

Thread overview: 20+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-07-04 15:56 [PATCH v3 0/5] vchiq: Patch to separate platform and cdev code Ojaswin Mujoo
2021-07-04 15:57 ` [PATCH v3 1/5] staging: vchiq: Refactor vchiq " Ojaswin Mujoo
2021-07-11 10:33   ` Stefan Wahren
2021-07-04 15:57 ` [PATCH v3 2/5] staging: vchiq: Move certain declarations to vchiq_arm.h Ojaswin Mujoo
2021-07-11 10:34   ` Stefan Wahren
2021-07-04 15:58 ` [PATCH v3 3/5] staging: vchiq: Move vchiq char driver to its own file Ojaswin Mujoo
2021-07-05  9:56   ` Dan Carpenter
2021-07-05 10:58     ` Ojaswin Mujoo
2021-07-05 11:19       ` Dan Carpenter
2021-07-05 11:24         ` Ojaswin Mujoo
2021-07-11 10:35   ` Stefan Wahren
2021-07-04 15:59 ` Ojaswin Mujoo [this message]
2021-07-11 10:39   ` [PATCH v3 4/5] staging: vchiq: Make creation of vchiq cdev optional Stefan Wahren
2021-07-04 15:59 ` [PATCH v3 5/5] staging: vchiq: Combine vchiq platform code into single file Ojaswin Mujoo
2021-07-04 18:07   ` kernel test robot
2021-07-11 10:49   ` Stefan Wahren
2021-07-11 11:28     ` Ojaswin Mujoo
2021-07-21  8:22       ` Greg KH
2021-07-21 16:28         ` Ojaswin Mujoo
2021-07-11 10:29 ` [PATCH v3 0/5] vchiq: Patch to separate platform and cdev code Stefan Wahren

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=03cbe3fc1d9d7dbf9b0a3844b700eb9bf5459088.1625401928.git.ojaswin98@gmail.com \
    --to=ojaswin98@gmail.com \
    --cc=arnd@arndb.de \
    --cc=bcm-kernel-feedback-list@broadcom.com \
    --cc=dan.carpenter@oracle.com \
    --cc=gregkh@linuxfoundation.org \
    --cc=linux-arm-kernel@lists.infradead.org \
    --cc=linux-kernel@vger.kernel.org \
    --cc=linux-staging@lists.linux.dev \
    --cc=nsaenz@kernel.org \
    --cc=phil@raspberrypi.com \
    --cc=stefan.wahren@i2se.com \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body. 
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).