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path: root/src/drivers/generic/max98357a
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2016-07-08acpi: Change device properties to work as a treeDuncan Laurie
There is a second ACPI _DSD document from the UEFI Forum that details how _DSD style tables can be nested, creating a tree of similarly formatted tables. This document is linked from acpi_device.h. In order to support this the device property interface needs to be more flexible and build up a tree of properties to write all entries at once instead of writing each entry as it is generated. In the end this is a more flexible solution that can support drivers that need child tables like the DA7219 codec, while only requiring minor changes to the existing drivers that use the device property interface. This was tested on reef (apollolake) and chell (skylake) boards to ensure that there was no change in the generated SSDT AML. Change-Id: Ia22e3a5fd3982ffa7c324bee1a8d190d49f853dd Signed-off-by: Duncan Laurie <dlaurie@chromium.org> Reviewed-on: https://review.coreboot.org/15537 Tested-by: build bot (Jenkins) Reviewed-by: Aaron Durbin <adurbin@chromium.org>
2016-07-02drivers/generic/max98357a: Fix naming and ACPI path handlingDuncan Laurie
The upstream kernel driver is not using the of-style naming for sdmode-gpio so remove the maxim prefix, and remove the duplicate entry for the sdmode-delay value as well. Also fix the usage of the path variable, since the device path uses a static variable it can't be assigned that early or it will be overwritten by later calls. This results in the following output for the _DSD when tested on reef mainboard: Name (_DSD, Package (0x02) { ToUUID ("daffd814-6eba-4d8c-8a91-bc9bbf4aa301") Package (0x02) { Package (0x02) { "sdmode-gpio", Package (0x04) { \_SB.PCI0.HDAS.MAXM, Zero, Zero, Zero } }, Package (0x02) { "sdmode-delay", Zero } } }) Change-Id: Iab33182a5f64c89151966f5e79f4f7c30840c46f Signed-off-by: Duncan Laurie <dlaurie@chromium.org> Reviewed-on: https://review.coreboot.org/15514 Tested-by: build bot (Jenkins) Reviewed-by: Aaron Durbin <adurbin@chromium.org>
2016-06-02generic: Add a Maxim 98357A codec driverDuncan Laurie
The Maxim Integrated 98357A codec is an I2S slave device that has no control channel for configuration and instead provides a GPIO that is used for channel selection and power down. This means it does not fit into a bus hierarchy easily and is instead represented as a generic device and found with a static bus scan using the devicetree. This driver provides configuration options for passing the "sdmode" GPIO descriptor as well as a second option for "sdmode delay" which can configure the timing of the sdmode toggling in relation to the I2S channel output. In addition an GPIO can be provided to indicate to the driver whether this device is present or not. This can be used for board designs that may have different codec possibilities that are selected by HW strap. Sample usage for this device driver: device pci 1f.3 on chip drivers/generic/max98357a register "sdmode_gpio" = "ACPI_GPIO_OUTPUT(GPP_C6)" register "sdmode_delay" = "100" device generic 0 on end end end Will result in the following code in the SSDT: Scope (\_SB.PCI0.HDAS) { Device (MAXM) { Name (_HID, "MX98357A") Name (_UID, Zero) Name (_DDN, "Maxim Integrated 98357A Amplifier") Method (_STA) { Return (0xF) } Name (_CRS, ResourceTemplate () { GpioIo (Exclusive, PullDefault, 0, 0, IoRestrictionOutputOnly, "\\_SB.PCI0.GPIO", 0, ResourceConsumer) }) Name (_DSD, Package () { ToUUID ("daffd814-6eba-4d8c-8a91-bc9bbf4aa301"), Package () { Package () { "maxim,sdmode-gpio", \_SB.PCI0.HDAS.MAXM, 0, 0, 0 } Package () { "maxim,sdmode-delay", 100 } Package () { "sdmode-delay", 100 } } }) } } Change-Id: Ia0bafe49bea9bbe4a3cc0f9f9cdb6f6390da57b5 Signed-off-by: Duncan Laurie <dlaurie@chromium.org> Reviewed-on: https://review.coreboot.org/15017 Tested-by: build bot (Jenkins) Reviewed-by: Aaron Durbin <adurbin@chromium.org>