[coreboot-gerrit] Patch merged into coreboot/master: generic: Add a Maxim 98357A codec driver
gerrit at coreboot.org
gerrit at coreboot.org
Thu Jun 2 05:37:22 CEST 2016
the following patch was just integrated into master:
commit 7db15094c259f9417d16cbba102cea100eb2bcf8
Author: Duncan Laurie <dlaurie at chromium.org>
Date: Wed May 11 11:27:47 2016 -0700
generic: Add a Maxim 98357A codec driver
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 at chromium.org>
Reviewed-on: https://review.coreboot.org/15017
Tested-by: build bot (Jenkins)
Reviewed-by: Aaron Durbin <adurbin at chromium.org>
See https://review.coreboot.org/15017 for details.
-gerrit
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