From bcaf089c5160639d6c43091f717faa3d0dc8f3d8 Mon Sep 17 00:00:00 2001 From: Benson Leung Date: Thu, 21 Feb 2013 12:14:58 -0800 Subject: Platform: x86: chromeos_laptop - Add support for probing devices This will allow support for devices that may appear at more than one i2c address at boot time. The specific example is the atmel_mxt touch devices, which may appear at a different address if it comes up in bootloader mode. Signed-off-by: Benson Leung Signed-off-by: Matthew Garrett --- drivers/platform/x86/chromeos_laptop.c | 20 ++++++++++++++++++++ 1 file changed, 20 insertions(+) (limited to 'drivers/platform') diff --git a/drivers/platform/x86/chromeos_laptop.c b/drivers/platform/x86/chromeos_laptop.c index 577e64d9f0ac..c13f0c5e282a 100644 --- a/drivers/platform/x86/chromeos_laptop.c +++ b/drivers/platform/x86/chromeos_laptop.c @@ -147,6 +147,26 @@ static int __init find_i2c_adapter_num(enum i2c_adapter_type type) return adapter->nr; } +/* + * Takes a list of addresses in addrs as such : + * { addr1, ... , addrn, I2C_CLIENT_END }; + * add_probed_i2c_device will use i2c_new_probed_device + * and probe for devices at all of the addresses listed. + * Returns NULL if no devices found. + * See Documentation/i2c/instantiating-devices for more information. + */ +static __init struct i2c_client *add_probed_i2c_device( + const char *name, + enum i2c_adapter_type type, + struct i2c_board_info *info, + const unsigned short *addrs) +{ + return __add_probed_i2c_device(name, + find_i2c_adapter_num(type), + info, + addrs); +} + /* * Probes for a device at a single address, the one provided by * info->addr. -- cgit v1.2.3