linux-kernel - [PATCH v2] misc: fastrpc: Move fastrpc driver to misc/fastrpc/

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Date: Thu, 27 Jun 2024 14:16:27 +0530
From: Ekansh Gupta <quic_ekangupt@...cinc.com>
To: <srinivas.kandagatla@...aro.org>, <linux-arm-msm@...r.kernel.org>
CC: <gregkh@...uxfoundation.org>, <quic_bkumar@...cinc.com>,
        <linux-kernel@...r.kernel.org>, <quic_chennak@...cinc.com>,
        <dri-devel@...ts.freedesktop.org>, <arnd@...db.de>
Subject: [PATCH v2] misc: fastrpc: Move fastrpc driver to misc/fastrpc/

Move fastrpc.c from misc/ to misc/fastrpc/. New C files are planned
to be added for PD notifications and other missing features. Adding
and maintaining new files from within fastrpc directory would be easy.

Example of feature that is being planned to be introduced in a new C
file:
https://lore.kernel.org/all/20240606165939.12950-6-quic_ekangupt@quicinc.com/

Signed-off-by: Ekansh Gupta <quic_ekangupt@...cinc.com>
---
Changes in v2:
  - Updated Kconfig.

 MAINTAINERS                          |  2 +-
 drivers/misc/Kconfig                 | 13 +------------
 drivers/misc/Makefile                |  2 +-
 drivers/misc/fastrpc/Kconfig         | 16 ++++++++++++++++
 drivers/misc/fastrpc/Makefile        |  2 ++
 drivers/misc/{ => fastrpc}/fastrpc.c |  0
 6 files changed, 21 insertions(+), 14 deletions(-)
 create mode 100644 drivers/misc/fastrpc/Kconfig
 create mode 100644 drivers/misc/fastrpc/Makefile
 rename drivers/misc/{ => fastrpc}/fastrpc.c (100%)

diff --git a/MAINTAINERS b/MAINTAINERS
index 0b99543d9c6e..55d0fecd1a74 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -18502,7 +18502,7 @@ L:	linux-arm-msm@...r.kernel.org
 L:	dri-devel@...ts.freedesktop.org
 S:	Maintained
 F:	Documentation/devicetree/bindings/misc/qcom,fastrpc.yaml
-F:	drivers/misc/fastrpc.c
+F:	drivers/misc/fastrpc/
 F:	include/uapi/misc/fastrpc.h
 
 QUALCOMM HEXAGON ARCHITECTURE
diff --git a/drivers/misc/Kconfig b/drivers/misc/Kconfig
index faf983680040..630e8ccd8669 100644
--- a/drivers/misc/Kconfig
+++ b/drivers/misc/Kconfig
@@ -276,18 +276,6 @@ config QCOM_COINCELL
 	  to maintain PMIC register and RTC state in the absence of
 	  external power.
 
-config QCOM_FASTRPC
-	tristate "Qualcomm FastRPC"
-	depends on ARCH_QCOM || COMPILE_TEST
-	depends on RPMSG
-	select DMA_SHARED_BUFFER
-	select QCOM_SCM
-	help
-	  Provides a communication mechanism that allows for clients to
-	  make remote method invocations across processor boundary to
-	  applications DSP processor. Say M if you want to enable this
-	  module.
-
 config SGI_GRU
 	tristate "SGI GRU driver"
 	depends on X86_UV && SMP
@@ -602,4 +590,5 @@ source "drivers/misc/cardreader/Kconfig"
 source "drivers/misc/uacce/Kconfig"
 source "drivers/misc/pvpanic/Kconfig"
 source "drivers/misc/mchp_pci1xxxx/Kconfig"
+source "drivers/misc/fastrpc/Kconfig"
 endmenu
diff --git a/drivers/misc/Makefile b/drivers/misc/Makefile
index 153a3f4837e8..f83d73844ea5 100644
--- a/drivers/misc/Makefile
+++ b/drivers/misc/Makefile
@@ -16,7 +16,6 @@ obj-$(CONFIG_TIFM_CORE)       	+= tifm_core.o
 obj-$(CONFIG_TIFM_7XX1)       	+= tifm_7xx1.o
 obj-$(CONFIG_PHANTOM)		+= phantom.o
 obj-$(CONFIG_QCOM_COINCELL)	+= qcom-coincell.o
-obj-$(CONFIG_QCOM_FASTRPC)	+= fastrpc.o
 obj-$(CONFIG_SENSORS_BH1770)	+= bh1770glc.o
 obj-$(CONFIG_SENSORS_APDS990X)	+= apds990x.o
 obj-$(CONFIG_ENCLOSURE_SERVICES) += enclosure.o
@@ -69,3 +68,4 @@ obj-$(CONFIG_TMR_INJECT)	+= xilinx_tmr_inject.o
 obj-$(CONFIG_TPS6594_ESM)	+= tps6594-esm.o
 obj-$(CONFIG_TPS6594_PFSM)	+= tps6594-pfsm.o
 obj-$(CONFIG_NSM)		+= nsm.o
+obj-y				+= fastrpc/
diff --git a/drivers/misc/fastrpc/Kconfig b/drivers/misc/fastrpc/Kconfig
new file mode 100644
index 000000000000..7179a44eda84
--- /dev/null
+++ b/drivers/misc/fastrpc/Kconfig
@@ -0,0 +1,16 @@
+# SPDX-License-Identifier: GPL-2.0-only
+#
+# Qualcomm FastRPC devices
+#
+
+config QCOM_FASTRPC
+	tristate "Qualcomm FastRPC"
+	depends on ARCH_QCOM || COMPILE_TEST
+	depends on RPMSG
+	select DMA_SHARED_BUFFER
+	select QCOM_SCM
+	help
+	  Provides a communication mechanism that facilitate high-speed
+	  Remote Procedure Call (RPC) mechanisms between the host CPU and
+	  offload processors Qualcomm Digital Signal Processors (DSPs).
+	  Say M if you want to enable this module.
\ No newline at end of file
diff --git a/drivers/misc/fastrpc/Makefile b/drivers/misc/fastrpc/Makefile
new file mode 100644
index 000000000000..77fd2b763b6b
--- /dev/null
+++ b/drivers/misc/fastrpc/Makefile
@@ -0,0 +1,2 @@
+# SPDX-License-Identifier: GPL-2.0
+obj-$(CONFIG_QCOM_FASTRPC)	+= fastrpc.o
diff --git a/drivers/misc/fastrpc.c b/drivers/misc/fastrpc/fastrpc.c
similarity index 100%
rename from drivers/misc/fastrpc.c
rename to drivers/misc/fastrpc/fastrpc.c
-- 
2.34.1