From: Jean Delvare <khali@linux-fr.org>
Date: Tue, 12 Dec 2006 17:18:29 +0000 (+0100)
Subject: hwmon/f71805f: Fix the device address decoding
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=75c990291dd7af84ea68f3c3ead934b51d0b81ad;p=GitHub%2FLineageOS%2FG12%2Fandroid_kernel_amlogic_linux-4.9.git

hwmon/f71805f: Fix the device address decoding

The lowest 3 bits are ignored, and the chip decodes all 8 addresses,
not only the 2 it needs.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
---

diff --git a/drivers/hwmon/f71805f.c b/drivers/hwmon/f71805f.c
index 37ba421789bc..a272cae8f60e 100644
--- a/drivers/hwmon/f71805f.c
+++ b/drivers/hwmon/f71805f.c
@@ -102,9 +102,9 @@ superio_exit(int base)
  * ISA constants
  */
 
-#define REGION_LENGTH		2
-#define ADDR_REG_OFFSET		0
-#define DATA_REG_OFFSET		1
+#define REGION_LENGTH		8
+#define ADDR_REG_OFFSET		5
+#define DATA_REG_OFFSET		6
 
 /*
  * Registers
@@ -1359,6 +1359,7 @@ static int __init f71805f_find(int sioaddr, unsigned short *address,
 		       "skipping\n");
 		goto exit;
 	}
+	*address &= ~(REGION_LENGTH - 1);	/* Ignore 3 LSB */
 
 	err = 0;
 	printk(KERN_INFO DRVNAME ": Found %s chip at %#x, revision %u\n",