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authorGuenter Roeck <guenter.roeck@ericsson.com>2011-01-26 20:09:02 -0800
committerGuenter Roeck <guenter.roeck@ericsson.com>2011-03-14 22:36:26 -0700
commit442aba78728e77e03172ba83e905b9aff96febcf (patch)
treefe6c99958017922dafd4010c3af2c8c8b6441057 /include/linux/i2c
parent06923f84422371a6fb10b3efcd05b80ab48715c0 (diff)
hwmon: PMBus device driver
This driver adds support for hardware monitoring features of various PMBus devices. Signed-off-by: Guenter Roeck <guenter.roeck@ericsson.com> Acked-by: Jonathan Cameron <jic23@cam.ac.uk>
Diffstat (limited to 'include/linux/i2c')
-rw-r--r--include/linux/i2c/pmbus.h45
1 files changed, 45 insertions, 0 deletions
diff --git a/include/linux/i2c/pmbus.h b/include/linux/i2c/pmbus.h
new file mode 100644
index 000000000000..69280db02c41
--- /dev/null
+++ b/include/linux/i2c/pmbus.h
@@ -0,0 +1,45 @@
+/*
+ * Hardware monitoring driver for PMBus devices
+ *
+ * Copyright (c) 2010, 2011 Ericsson AB.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#ifndef _PMBUS_H_
+#define _PMBUS_H_
+
+/* flags */
+
+/*
+ * PMBUS_SKIP_STATUS_CHECK
+ *
+ * During register detection, skip checking the status register for
+ * communication or command errors.
+ *
+ * Some PMBus chips respond with valid data when trying to read an unsupported
+ * register. For such chips, checking the status register is mandatory when
+ * trying to determine if a chip register exists or not.
+ * Other PMBus chips don't support the STATUS_CML register, or report
+ * communication errors for no explicable reason. For such chips, checking
+ * the status register must be disabled.
+ */
+#define PMBUS_SKIP_STATUS_CHECK (1 << 0)
+
+struct pmbus_platform_data {
+ u32 flags; /* Device specific flags */
+};
+
+#endif /* _PMBUS_H_ */