I'm new to kernel development, and there's few fairly large gaps in my understanding about how drivers are meant to work, but hopefully you guys can point me in the right direction. The macbook8,1 (early 2015) has a keyboard/trackpad that is seen by ACPI as a single SPI slave device. It appears the only method to access the keyboard/trackpad is via the SPI bus --my goal is the get keyboard/trackpad working. I've recently submitted a kernel patch that binds the spi-pxa2xx-pci driver to the Wildcat Point-LP Serial IO GSPI Controller. With this patch, the SPI controller appears to be working... http://www.spinics.net/lists/linux-spi/msg06867.html ----------LSHW INFO------------ *-serial:1 description: Serial bus controller product: Wildcat Point-LP Serial IO GSPI Controller #1 vendor: Intel Corporation physical id: 15.4 bus info: pci@0000:00:15.4 version: 03 width: 32 bits clock: 33MHz capabilities: pm cap_list configuration: driver=pxa2xx_spi_pci latency=0 resources: irq:21 memory:c181a000-c181afff What I'm having trouble with is sorting out how to register the SPI slave device with the SPI controller. **no slave devices are found when I modprobe the driver. I'm not sure if this is something that should be done by the spi driver (by calling an acpi function), or whether I must manually do it. –------------UDEV INFO--------------- P: /devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A08:00/INT33C1:00/APP000D:00 E: DEVPATH=/devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A08:00/INT33C1:00/APP000D:00 E: ID_VENDOR_FROM_DATABASE=Apple Computer Inc E: MODALIAS=acpi:APP000D:APPLE-SPI-TOPCASE: E: SUBSYSTEM=acpi E: USEC_INITIALIZED=13574842 **INT33C1 is the SPI master controller **APP000D is the slave device ----------------SPI modules loaded----------- spi_pxa2xx_platform 24576 0 spi_pxa2xx_pci 16384 0 The ACPI DSDT table (decoded): https://bugzilla.kernel.org/attachment.cgi?id=202141 The full bug report: https://bugzilla.kernel.org/show_bug.cgi?id=108331 ANY help would be appreciated Leif Liddy -- 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
