From c018664c51aca418e16bc83f75257c68250fb052 Mon Sep 17 00:00:00 2001 From: Jean Delvare Date: Tue, 16 Oct 2007 01:28:18 -0700 Subject: rtc-pcf8583: Check for i2c adapter functionality Not all i2c adapters support I2C-level messaging. Check that the adapter does before probing for a PCF8583 chip, as the driver makes use of i2c_transfer and i2c_master_send. Signed-off-by: Jean Delvare Signed-off-by: Alessandro Zummo Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- drivers/rtc/rtc-pcf8583.c | 3 +++ 1 file changed, 3 insertions(+) (limited to 'drivers/rtc') diff --git a/drivers/rtc/rtc-pcf8583.c b/drivers/rtc/rtc-pcf8583.c index d48b03374586..556d0e7da35b 100644 --- a/drivers/rtc/rtc-pcf8583.c +++ b/drivers/rtc/rtc-pcf8583.c @@ -332,6 +332,9 @@ static int pcf8583_probe(struct i2c_adapter *adap, int addr, int kind) } }; + if (!i2c_check_functionality(adap, I2C_FUNC_I2C)) + return 0; + pcf = kzalloc(sizeof(*pcf), GFP_KERNEL); if (!pcf) return -ENOMEM; -- cgit v1.2.3