Merge branch 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mjg59/platform-drivers-x86

* 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mjg59/platform-drivers-x86: (88 commits)
  ips driver: make it less chatty
  intel_scu_ipc: fix size field for intel_scu_ipc_command
  intel_scu_ipc: return -EIO for error condition in busy_loop
  intel_scu_ipc: fix data packing of PMIC command on Moorestown
  Clean up command packing on MRST.
  zero the stack buffer before giving random garbage to the SCU
  Fix stack buffer size for IPC writev messages
  intel_scu_ipc: Use the new cpu identification function
  intel_scu_ipc: tidy up unused bits
  Remove indirect read write api support.
  intel_scu_ipc: Support Medfield processors
  intel_scu_ipc: detect CPU type automatically
  x86 plat: limit x86 platform driver menu to X86
  acpi ec_sys: Be more cautious about ec write access
  acpi ec: Fix possible double io port registration
  hp-wmi: acpi_drivers.h is already included through acpi.h two lines below
  hp-wmi: Fix mixing up of and/or directive
  dell-laptop: make dell_laptop_i8042_filter() static
  asus-laptop: fix asus_input_init error path
  msi-wmi: make needlessly global symbols static
  ...

1 files changed, 160 insertions, 0 deletions

diff --git a/drivers/acpi/ec_sys.c b/drivers/acpi/ec_sys.c
new file mode 100644
index 000000000000..0e869b3f81ca
--- /dev/null
+++ b/drivers/acpi/ec_sys.c
@@ -0,0 +1,160 @@
+/*
+ * ec_sys.c
+ *
+ * Copyright (C) 2010 SUSE Products GmbH/Novell
+ * Author:
+ *      Thomas Renninger <trenn@suse.de>
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2.
+ */
+
+#include <linux/kernel.h>
+#include <linux/acpi.h>
+#include <linux/debugfs.h>
+#include "internal.h"
+
+MODULE_AUTHOR("Thomas Renninger <trenn@suse.de>");
+MODULE_DESCRIPTION("ACPI EC sysfs access driver");
+MODULE_LICENSE("GPL");
+
+static bool write_support;
+module_param(write_support, bool, 0644);
+MODULE_PARM_DESC(write_support, "Dangerous, reboot and removal of battery may "
+		 "be needed.");
+
+#define EC_SPACE_SIZE 256
+
+struct sysdev_class acpi_ec_sysdev_class = {
+	.name = "ec",
+};
+
+static struct dentry *acpi_ec_debugfs_dir;
+
+static int acpi_ec_open_io(struct inode *i, struct file *f)
+{
+	f->private_data = i->i_private;
+	return 0;
+}
+
+static ssize_t acpi_ec_read_io(struct file *f, char __user *buf,
+			       size_t count, loff_t *off)
+{
+	/* Use this if support reading/writing multiple ECs exists in ec.c:
+	 * struct acpi_ec *ec = ((struct seq_file *)f->private_data)->private;
+	 */
+	unsigned int size = EC_SPACE_SIZE;
+	u8 *data = (u8 *) buf;
+	loff_t init_off = *off;
+	int err = 0;
+
+	if (*off >= size)
+		return 0;
+	if (*off + count >= size) {
+		size -= *off;
+		count = size;
+	} else
+		size = count;
+
+	while (size) {
+		err = ec_read(*off, &data[*off - init_off]);
+		if (err)
+			return err;
+		*off += 1;
+		size--;
+	}
+	return count;
+}
+
+static ssize_t acpi_ec_write_io(struct file *f, const char __user *buf,
+				size_t count, loff_t *off)
+{
+	/* Use this if support reading/writing multiple ECs exists in ec.c:
+	 * struct acpi_ec *ec = ((struct seq_file *)f->private_data)->private;
+	 */
+
+	unsigned int size = count;
+	loff_t init_off = *off;
+	u8 *data = (u8 *) buf;
+	int err = 0;
+
+	if (*off >= EC_SPACE_SIZE)
+		return 0;
+	if (*off + count >= EC_SPACE_SIZE) {
+		size = EC_SPACE_SIZE - *off;
+		count = size;
+	}
+
+	while (size) {
+		u8 byte_write = data[*off - init_off];
+		err = ec_write(*off, byte_write);
+		if (err)
+			return err;
+
+		*off += 1;
+		size--;
+	}
+	return count;
+}
+
+static struct file_operations acpi_ec_io_ops = {
+	.owner = THIS_MODULE,
+	.open  = acpi_ec_open_io,
+	.read  = acpi_ec_read_io,
+	.write = acpi_ec_write_io,
+};
+
+int acpi_ec_add_debugfs(struct acpi_ec *ec, unsigned int ec_device_count)
+{
+	struct dentry *dev_dir;
+	char name[64];
+	mode_t mode = 0400;
+
+	if (ec_device_count == 0) {
+		acpi_ec_debugfs_dir = debugfs_create_dir("ec", NULL);
+		if (!acpi_ec_debugfs_dir)
+			return -ENOMEM;
+	}
+
+	sprintf(name, "ec%u", ec_device_count);
+	dev_dir = debugfs_create_dir(name, acpi_ec_debugfs_dir);
+	if (!dev_dir) {
+		if (ec_device_count != 0)
+			goto error;
+		return -ENOMEM;
+	}
+
+	if (!debugfs_create_x32("gpe", 0444, dev_dir, (u32 *)&first_ec->gpe))
+		goto error;
+	if (!debugfs_create_bool("use_global_lock", 0444, dev_dir,
+				 (u32 *)&first_ec->global_lock))
+		goto error;
+
+	if (write_support)
+		mode = 0600;
+	if (!debugfs_create_file("io", mode, dev_dir, ec, &acpi_ec_io_ops))
+		goto error;
+
+	return 0;
+
+error:
+	debugfs_remove_recursive(acpi_ec_debugfs_dir);
+	return -ENOMEM;
+}
+
+static int __init acpi_ec_sys_init(void)
+{
+	int err = 0;
+	if (first_ec)
+		err = acpi_ec_add_debugfs(first_ec, 0);
+	else
+		err = -ENODEV;
+	return err;
+}
+
+static void __exit acpi_ec_sys_exit(void)
+{
+	debugfs_remove_recursive(acpi_ec_debugfs_dir);
+}
+
+module_init(acpi_ec_sys_init);
+module_exit(acpi_ec_sys_exit);