[DO NOT APPLY PATCH v8 08/15] tools/poeg: Add test app for poeg

Biju
2025-11-21T16:08:52Z

Add test app for poeg for controlling output disable through
user space.

Signed-off-by: Biju Das <biju.das.jz@bp.renesas.com>
---
tools/poeg/Build | 1 +
tools/poeg/Makefile | 53 +++++++++++++++++++++++++++++++++++++++
tools/poeg/poeg_app.c | 58 +++++++++++++++++++++++++++++++++++++++++++
3 files changed, 112 insertions(+)
create mode 100644 tools/poeg/Build
create mode 100644 tools/poeg/Makefile
create mode 100644 tools/poeg/poeg_app.c

diff --git a/tools/poeg/Build b/tools/poeg/Build
new file mode 100644
index 000000000000..f960920a4afb
--- /dev/null
+++ b/tools/poeg/Build
@@ -0,0 +1 @@
+poeg_app-y += poeg_app.o
diff --git a/tools/poeg/Makefile b/tools/poeg/Makefile
new file mode 100644
index 000000000000..669c914d9c98
--- /dev/null
+++ b/tools/poeg/Makefile
@@ -0,0 +1,53 @@
+# SPDX-License-Identifier: GPL-2.0
+include ../scripts/Makefile.include
+
+bindir ?= /usr/bin
+
+ifeq ($(srctree),)
+srctree := $(patsubst %/,%,$(dir $(CURDIR)))
+srctree := $(patsubst %/,%,$(dir $(srctree)))
+endif
+
+# Do not use make's built-in rules
+# (this improves performance and avoids hard-to-debug behaviour);
+MAKEFLAGS += -r
+
+override CFLAGS += -O2 -Wall -g -D_GNU_SOURCE -I$(OUTPUT)include
+
+ALL_TARGETS := poeg_app
+ALL_PROGRAMS := $(patsubst %,$(OUTPUT)%,$(ALL_TARGETS))
+
+all: $(ALL_PROGRAMS)
+
+export srctree OUTPUT CC LD CFLAGS
+include $(srctree)/tools/build/Makefile.include
+
+#
+# We need the following to be outside of kernel tree
+#
+$(OUTPUT)include/linux/poeg.h: ../../include/linux/pinctrl/rzg2l-poeg.h
+ mkdir -p $(OUTPUT)include/linux 2>&1 || true
+ ln -sf $(CURDIR)/../../include/linux/pinctrl/rzg2l-poeg.h $@
+
+prepare: $(OUTPUT)include/linux/poeg.h
+
+POEG_EXAMPLE := $(OUTPUT)poeg_app.o
+$(POEG_EXAMPLE): prepare FORCE
+ $(Q)$(MAKE) $(build)=poeg_app
+$(OUTPUT)poeg_app: $(POEG_EXAMPLE)
+ $(QUIET_LINK)$(CC) $(CFLAGS) $(LDFLAGS) $< -o $@
+
+clean:
+ rm -f $(ALL_PROGRAMS)
+ rm -rf $(OUTPUT)include/linux/poeg.h
+ find $(or $(OUTPUT),.) -name '*.o' -delete -o -name '\.*.d' -delete
+
+install: $(ALL_PROGRAMS)
+ install -d -m 755 $(DESTDIR)$(bindir); \
+ for program in $(ALL_PROGRAMS); do \
+ install $$program $(DESTDIR)$(bindir); \
+ done
+
+FORCE:
+
+.PHONY: all install clean FORCE prepare
diff --git a/tools/poeg/poeg_app.c b/tools/poeg/poeg_app.c
new file mode 100644
index 000000000000..4ff8e5c007dc
--- /dev/null
+++ b/tools/poeg/poeg_app.c
@@ -0,0 +1,58 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * POEG - example userspace application
+ * Copyright (C) 2023 Biju Das
+ */
+#include <stdio.h>
+#include <stdlib.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <errno.h>
+#include <sys/ioctl.h>
+#include <linux/ioctl.h>
+#include <stdio.h>
+#include <unistd.h>
+#include <sys/time.h>
+#include <sys/types.h>
+#include <poll.h>
+
+#include <linux/poeg.h>
+
+int main(int argc, char *argv[])
+{
+ struct poeg_cmd cmd;
+ unsigned int val;
+ long cmd_val;
+ char *p;
+ int i;
+
+ cmd_val = strtol(argv[1], &p, 10);
+ if (*p != '\0' || errno != 0)
+ return 1; // In main(), returning non-zero means failure
+
+ fd = open("/dev/poeg3", O_RDWR);
+ if (fd < 0)
+ perror("open");
+ else
+ printf("[POEG]open\n");
+
+ cmd.val = cmd_val;
+ cmd.channel = 4;
+ if (cmd.val == RZG2L_POEG_OUTPUT_DISABLE_USR_ENABLE_CMD)
+ printf("[POEG] user control pin output disable enabled\n");
+ else
+ printf("[POEG] user control pin output disable disabled\n");
+
+ ret = write(fd, &cmd, sizeof(cmd));
+ if (ret == -1) {
+ perror("Failed to write cmd data");
+ return 1;
+ }
+
+ if (close(fd) != 0)
+ perror("close");
+ else
+ printf("[POEG]close\n");
+
+ return 0;
+}
--
2.43.0