Platform: x86: chromeos_laptop - Add support for probing devices (bcaf089c) · Commits · 戴 / test

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 <bleung@chromium.org> Signed-off-by:

Matthew Garrett <matthew.garrett@nebula.com>

drivers/platform/x86/chromeos_laptop.c

+20 −0

Original line number	Diff line number	Diff line
		@@ -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.

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