On Fri, Jan 8, 2010 at 9:07 AM, mibo <[email protected]> wrote: > And now the question: When I look at the board configuration file / > android/msm/arch/arm/mach-msm/board-sapphire.c (I think this is for > the HTC Dream phone) I can see there are two touchscreen drivers > active: > > static struct i2c_board_info i2c_devices[] = { > { > I2C_BOARD_INFO(SYNAPTICS_I2C_RMI_NAME, 0x20), > .platform_data = sapphire_ts_data, > .irq = SAPPHIRE_GPIO_TO_INT(SAPPHIRE_GPIO_TP_ATT_N) > }, > { > I2C_BOARD_INFO(ELAN_8232_I2C_NAME, 0x10), > .platform_data = &elan_i2c_data, > .irq = SAPPHIRE_GPIO_TO_INT(SAPPHIRE_GPIO_TP_ATT_N), > }, > .... > ..... > } > > Why are there two active drivers? Does the HTC Dream have different > hardware versions and either the I2C access to address 0x20 or to 0x10 > fails and the other one then is used? > Or are there really two controllers?
No, all this shows is that the driver supports hardware with _either_ of these configurations. And yes, it probably would work if you had devices with both types of configurations on the same system, but then you would have two different instances of the device in the system. But odds are, that is not in a phone :) Hope this helps, greg k-h
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