# HG changeset patch
# User Richard Lowe <richlowe@richlowe.net>
# Date 1308656444 25200
# Node ID ab0e9bcbdf3e365f94d79916e2779ecaf478b0f2
# Parent  1e93e74c836a11d8b6220fbbd0cc5d3682c396f4
2195 lm75 ignores the half degree bit in writes
Reviewed by: Jason King <jason.brian.king@gmail.com>
Reviewed by: Garrett D'Amore <garrett@damore.org>
Reviewed by: Albert Lee <trisk@nexenta.com>
Reviewed by: Joshua M. Clulow <josh@sysmgr.org>
Approved by: Robert Mustacchi <rm@joyent.com>

diff -r 1e93e74c836a -r ab0e9bcbdf3e usr/src/uts/sun4u/io/i2c/clients/lm75.c
--- a/usr/src/uts/sun4u/io/i2c/clients/lm75.c	Fri Mar 02 19:01:23 2012 -0500
+++ b/usr/src/uts/sun4u/io/i2c/clients/lm75.c	Tue Jun 21 04:40:44 2011 -0700
@@ -293,10 +293,21 @@
 				unitp->lm75_name));
 		return (ENOMEM);
 	}
+
+	/* BEGIN CSTYLED */
+	/*
+	 * The temperature is 16bits where the top 9 are a twos-complement
+	 * word with the the least significant bit used to indicate 0.5C
+	 *
+	 * |15|14|13|12|11|10| 9| 8| 7| 6| 5| 4| 3| 2| 1| 0|
+	 * |-----------------------------------------------|
+	 * |+-|	     Temperature      |	      Unused       |
+	 */
+	/* END CSTYLED */
 	i2c_tran_pointer->i2c_flags = I2C_WR;
 	i2c_tran_pointer->i2c_wbuf[0] = (uchar_t)reg;
-	i2c_tran_pointer->i2c_wbuf[1] = (temp16 >> 1);
-	i2c_tran_pointer->i2c_wbuf[2] =	((temp16 & 0xFE) << 7);
+	i2c_tran_pointer->i2c_wbuf[1] = ((temp16 >> 1) & 0xff);
+	i2c_tran_pointer->i2c_wbuf[2] = ((temp16 & 0x1) << 7);
 
 	err = i2c_transfer(unitp->lm75_hdl, i2c_tran_pointer);
 	i2c_transfer_free(unitp->lm75_hdl, i2c_tran_pointer);