Subject: [PATCH] [acpi driver model] Add proc interface to AC driver

- Create drivers/acpi/drivers/ac/proc.c
- Build it (when the ACPI proc interface is enabled)

This driver should now be 100% compatible with the
legacy driver.

Signed-off-by: Patrick Mochel <mochel@linux.intel.com>

---

 drivers/acpi/drivers/ac/Makefile |    2 ++
 drivers/acpi/drivers/ac/proc.c   |   46 ++++++++++++++++++++++++++++++++++++++
 2 files changed, 48 insertions(+), 0 deletions(-)
 create mode 100644 drivers/acpi/drivers/ac/proc.c

applies-to: d7acaacff22f154dede0aa2c836c5217a7588ea3
663a5f027c0921d20fd7ba7419d37dbb9ed7d6a2
diff --git a/drivers/acpi/drivers/ac/Makefile b/drivers/acpi/drivers/ac/Makefile
index a5b6bb2..91f0082 100644
--- a/drivers/acpi/drivers/ac/Makefile
+++ b/drivers/acpi/drivers/ac/Makefile
@@ -2,3 +2,5 @@ obj-$(CONFIG_ACPI_AC)	+= ac.o
 
 ac-y			:= driver.o device.o event.o
 
+ac-$(CONFIG_ACPI_DM_PROC)	+= proc.o
+
diff --git a/drivers/acpi/drivers/ac/proc.c b/drivers/acpi/drivers/ac/proc.c
new file mode 100644
index 0000000..a83276c
--- /dev/null
+++ b/drivers/acpi/drivers/ac/proc.c
@@ -0,0 +1,46 @@
+/**
+ * drivers/acpi/drivers/ac/proc.c - procfs interface for ac driver
+ *
+ * Copyright (C) 2005 Patrick Mochel
+ *
+ * Based on old-school driver drivers/acpi/ac.c.
+ *
+ * This file is released under the GPLv2.
+ */
+
+#include <acpi/driver.h>
+#include "ac.h"
+
+static int read_state(struct seq_file * seq, void * offset)
+{
+	struct acpi_dev * ad = seq->private;
+	struct acpi_ac * ac = dev_get_drvdata(&ad->dev);
+	const char * state;
+
+	if (ac_get_state(ac)) {
+		seq_puts(seq, "ERROR: Unable to read AC Adapter state\n");
+		return 0;
+	}
+
+	if (ac->a_state == AC_STATE_ONLINE)
+		state = "on-line";
+	else if (ac->a_state == AC_STATE_OFFLINE)
+		state = "off-line";
+	else
+		state = "unknown";
+
+	seq_printf(seq, "state:                   %s\n", state);
+	return 0;
+}
+
+static int open_state(struct inode * inode, struct file * file)
+{
+	return single_open(file, read_state, PDE(inode)->data);
+}
+
+static struct acpi_proc_file ac_files[] = {
+	proc_file_ro(state),
+};
+
+acpi_driver_proc(ac);
+
---
0.99.9.GIT