[PATCH 02/18] ledtrig-blkdev: Add build infra for block device LED trigger

Ian Pilcher
2021-09-03T20:46:01Z

Add files:
* ledtrig-blkdev-core.c - trigger components that are always built in
* ledtrig-blkdev.c - trigger components that can be built as a module
* ledtrig-blkdev.h - common declatarions

Add Kconfig options - CONFIG_LEDTRIG_BLKDEV (visible, tristate) and
CONFIG_LEDTRIG_BLKDEV_CORE (hidden, boolean)

Make CONFIG_LEDTRIG_BLKDEV select CONFIG_LEDTRIG_BLKDEV_CORE, so built-in
portion of the trigger is enabled when trigger is built-in or modular

Signed-off-by: Ian Pilcher <arequipeno@gmail.com>
---
drivers/leds/trigger/Kconfig | 18 ++++++++++++++++++
drivers/leds/trigger/Makefile | 2 ++
drivers/leds/trigger/ledtrig-blkdev-core.c | 9 +++++++++
drivers/leds/trigger/ledtrig-blkdev.c | 16 ++++++++++++++++
drivers/leds/trigger/ledtrig-blkdev.h | 12 ++++++++++++
5 files changed, 57 insertions(+)
create mode 100644 drivers/leds/trigger/ledtrig-blkdev-core.c
create mode 100644 drivers/leds/trigger/ledtrig-blkdev.c
create mode 100644 drivers/leds/trigger/ledtrig-blkdev.h

diff --git a/drivers/leds/trigger/Kconfig b/drivers/leds/trigger/Kconfig
index 1f1d57288085..7c31be355349 100644
--- a/drivers/leds/trigger/Kconfig
+++ b/drivers/leds/trigger/Kconfig
@@ -153,4 +153,22 @@ config LEDS_TRIGGER_TTY

When build as a module this driver will be called ledtrig-tty.

+config LEDS_TRIGGER_BLKDEV
+ tristate "LED Trigger for block devices"
+ depends on BLOCK
+ select LEDS_TRIGGER_BLKDEV_CORE
+ help
+ The blkdev LED trigger allows LEDs to be controlled by block device
+ activity (reads and writes).
+
+ See Documentation/leds/ledtrig-blkdev.rst.
+
+config LEDS_TRIGGER_BLKDEV_CORE
+ bool
+ depends on LEDS_TRIGGER_BLKDEV
+ help
+ This enables the portion of the block device LED trigger that must
+ be built in to the kernel, even when the trigger is built as a
+ module.
+
endif # LEDS_TRIGGERS
diff --git a/drivers/leds/trigger/Makefile b/drivers/leds/trigger/Makefile
index 25c4db97cdd4..3732eeb86775 100644
--- a/drivers/leds/trigger/Makefile
+++ b/drivers/leds/trigger/Makefile
@@ -16,3 +16,5 @@ obj-$(CONFIG_LEDS_TRIGGER_NETDEV) += ledtrig-netdev.o
obj-$(CONFIG_LEDS_TRIGGER_PATTERN) += ledtrig-pattern.o
obj-$(CONFIG_LEDS_TRIGGER_AUDIO) += ledtrig-audio.o
obj-$(CONFIG_LEDS_TRIGGER_TTY) += ledtrig-tty.o
+obj-$(CONFIG_LEDS_TRIGGER_BLKDEV) += ledtrig-blkdev.o
+obj-$(CONFIG_LEDS_TRIGGER_BLKDEV_CORE) += ledtrig-blkdev-core.o
diff --git a/drivers/leds/trigger/ledtrig-blkdev-core.c b/drivers/leds/trigger/ledtrig-blkdev-core.c
new file mode 100644
index 000000000000..a126c7fc0f9f
--- /dev/null
+++ b/drivers/leds/trigger/ledtrig-blkdev-core.c
@@ -0,0 +1,9 @@
+// SPDX-License-Identifier: GPL-2.0-only
+
+/*
+ * Block device LED triggers - built-in components
+ *
+ * Copyright 2021 Ian Pilcher <arequipeno@gmail.com>
+ */
+
+#include "ledtrig-blkdev.h"
diff --git a/drivers/leds/trigger/ledtrig-blkdev.c b/drivers/leds/trigger/ledtrig-blkdev.c
new file mode 100644
index 000000000000..8cbeb80697ae
--- /dev/null
+++ b/drivers/leds/trigger/ledtrig-blkdev.c
@@ -0,0 +1,16 @@
+// SPDX-License-Identifier: GPL-2.0-only
+
+/*
+ * Block device LED triggers - modular components
+ *
+ * Copyright 2021 Ian Pilcher <arequipeno@gmail.com>
+ */
+
+#include <linux/module.h>
+
+#include "ledtrig-blkdev.h"
+
+MODULE_DESCRIPTION("Block device LED trigger");
+MODULE_AUTHOR("Ian Pilcher <arequipeno@gmail.com>");
+MODULE_LICENSE("GPL v2");
+MODULE_IMPORT_NS(LEDTRIG_BLKDEV);
diff --git a/drivers/leds/trigger/ledtrig-blkdev.h b/drivers/leds/trigger/ledtrig-blkdev.h
new file mode 100644
index 000000000000..50b44461d4ab
--- /dev/null
+++ b/drivers/leds/trigger/ledtrig-blkdev.h
@@ -0,0 +1,12 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+/*
+ * Block device LED triggers
+ *
+ * Copyright 2021 Ian Pilcher <arequipeno@gmail.com>
+ */
+
+#ifndef __LEDTRIG_BLKDEV_H
+#define __LEDTRIG_BLKDEV_H
+
+#endif /* __LEDTRIG_BLKDEV_H */
--
2.31.1