From 50436a47c6b10c6e4e84e24ea44c5cb85bbcd290 Mon Sep 17 00:00:00 2001
From: Ben Gardner <gardner.ben@gmail.com>
Date: Sat, 1 Jul 2006 17:22:18 +0200
Subject: [PATCH] [PATCH] pca9539: Honor the force parameter
The pca9539 driver doesn't honor the force parameter; it always does
detection. This patch will skip detection if forced.
Signed-off-by: Ben Gardner <gardner.ben@gmail.com>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
---
drivers/i2c/chips/pca9539.c | 12 +++++++-----
1 file changed, 7 insertions(+), 5 deletions(-)
diff --git a/drivers/i2c/chips/pca9539.c b/drivers/i2c/chips/pca9539.c
index 54b6e6a4beedc..cb22280cdd277 100644
--- a/drivers/i2c/chips/pca9539.c
+++ b/drivers/i2c/chips/pca9539.c
@@ -134,11 +134,13 @@ static int pca9539_detect(struct i2c_adapter *adapter, int address, int kind)
new_client->driver = &pca9539_driver;
new_client->flags = 0;
- /* Detection: the pca9539 only has 8 registers (0-7).
- A read of 7 should succeed, but a read of 8 should fail. */
- if ((i2c_smbus_read_byte_data(new_client, 7) < 0) ||
- (i2c_smbus_read_byte_data(new_client, 8) >= 0))
- goto exit_kfree;
+ if (kind < 0) {
+ /* Detection: the pca9539 only has 8 registers (0-7).
+ A read of 7 should succeed, but a read of 8 should fail. */
+ if ((i2c_smbus_read_byte_data(new_client, 7) < 0) ||
+ (i2c_smbus_read_byte_data(new_client, 8) >= 0))
+ goto exit_kfree;
+ }
strlcpy(new_client->name, "pca9539", I2C_NAME_SIZE);
--
GitLab