On 2012年07月09日 12:02, Moore, Robert wrote: > These are already defined in acpica - in the file acrestyp.h > > ACPI_RESOURCE_FIXED_DMA FixedDma; > > ACPI_RESOURCE_GPIO Gpio; > ACPI_RESOURCE_I2C_SERIALBUS I2cSerialBus; > ACPI_RESOURCE_SPI_SERIALBUS SpiSerialBus; > ACPI_RESOURCE_UART_SERIALBUS UartSerialBus; > ACPI_RESOURCE_COMMON_SERIALBUS CommonSerialBus; > Yeah. Thanks for Bob's reminder. We can reuse these macros. > > >> -----Original Message----- >> From: linux-acpi-owner@xxxxxxxxxxxxxxx [mailto:linux-acpi- >> owner@xxxxxxxxxxxxxxx] On Behalf Of Lan Tianyu >> Sent: Sunday, July 08, 2012 8:25 PM >> To: Mika Westerberg >> Cc: Zhang, Rui; khali@xxxxxxxxxxxx; ben-linux@xxxxxxxxx; >> w.sang@xxxxxxxxxxxxxx; lenb@xxxxxxxxxx; linux-acpi@xxxxxxxxxxxxxxx; linux- >> i2c@xxxxxxxxxxxxxxx; linux-kernel@xxxxxxxxxxxxxxx; jkosina@xxxxxxx; >> chatty@xxxxxxx; jj_ding@xxxxxxxxxx; bhelgaas@xxxxxxxxxx; abelay@xxxxxxx >> Subject: Re: Fwd: Hid over I2C and ACPI interaction >> >> On 2012年07月06日 13:52, Mika Westerberg wrote: >>> On Thu, Jul 05, 2012 at 03:01:57PM +0800, Zhang Rui wrote: >>>> +Note that although these are ACPI devices, we prefer to use PnP drivers >>>> for them, >>>> +this is because: >>>> +1. all the non-ACPI-predefined Devices are exported as PnP devices as >>>> well >>>> +2. PnP bus is a well designed bus. Probing via PnP layer saves a lot of >>>> work >>>> + for the device driver, e.g. getting& parsing ACPI resources. >>> >>> (Nice BKM, thanks for sharing) >>> >>> I have few questions about using PnP drivers instead of pure ACPI >> drivers. >>> >>> ACPI 5.0 defined some new resources, for example "Fixed DMA descriptor" >>> that has information about the request line + channel for the device to >>> use. Hovewer, PnP drivers pass resources as 'struct resource', which >>> basically only has start and end - how do you represent all this new >> stuff >>> using 'struct resource'? >>> >> I think we can add new interface to get acpi specific resources. e.g >> struct acpi_resource pnp_get_acpi_resource(...). When the pnp acpi devices >> were initialized, put those acpi specific resources into a new resource >> list >> pnpdev->acpi_resources. What pnp_get_acpi_resource does is to get specified >> type acpi resources and return. We also need to define some acpi resource >> types. >> >> ACPI_RESOURCE_DMA >> ACPI_RESOURCE_I2C_SERIALBUS >> ACPI_RESOURCE_SPI_SERIALBUS >> ACPI_RESOURCE_UART_SERIALBUS >> ACPI_RESOURCE_COMMON_SERIALBUS >> ... >> >> How about this? welcome to comments. >> >>> Or should we use acpi_walk_resources() where 'struct resource' is not >>> suitable? >>> >> >> -- >> Best Regards >> Tianyu Lan >> linux kernel enabling team >> -- >> To unsubscribe from this list: send the line "unsubscribe linux-acpi" in >> the body of a message to majordomo@xxxxxxxxxxxxxxx >> More majordomo info at http://vger.kernel.org/majordomo-info.html -- Best Regards Tianyu Lan linux kernel enabling team -- To unsubscribe from this list: send the line "unsubscribe linux-i2c" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
