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samus: Set MICBIAS1 to 2.970V 

The default micbias1 voltage is 1.476V (1.8V * 0.82) which does
not match what's specified on the schematic. This patch sets
the voltage to 2.970V (3.3V * 0.90) according to the schematic.

BUG=chrome-os-partner:32953
BRANCH=samus
TEST=Set MICBIAS to 2.970V on Samus and verified with a scope

Change-Id: I1ced834a5afe2de3fccf4bcff8ec9c8e5718f60a
Signed-off-by: Stefan Reinauer <reinauer@chromium.org>
Original-Commit-Id: 176f9272801a3de5ed6fc05ade06042e2a2c0a5c
Original-Change-Id: Icdbc1b5f65fe28591d54544372bdc2dacb50e9c1
Original-Signed-off-by: Ben Zhang <benzh@chromium.org>
Original-Signed-off-by: Duncan Laurie <dlaurie@chromium.org>
Original-Reviewed-on: https://chromium-review.googlesource.com/241178
Reviewed-on: http://review.coreboot.org/9499
Tested-by: build bot (Jenkins)
Reviewed-by: Patrick Georgi <pgeorgi@google.com>
This commit is contained in:
Ben Zhang 2014-11-21 11:17:53 -08:00 committed by Stefan Reinauer
parent ba9b7bfc6f
commit 99e952d480
1 changed files with 2 additions and 0 deletions
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2
src/mainboard/google/samus/acpi/mainboard.asl
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@ -169,6 +169,7 @@ Scope (\_SB.PCI0.I2C0)
Name (_UID, 1)
Name (WAKE, 45) /* DSP_INT (use as codec wake) */
Name (MB1, 1) /* MICBIAS1 = 2.970V */
Name (DCLK, 0) /* RT5677_DMIC_CLK1 */
Name (PCLK, 1) /* RT5677_PDM_CLK_DIV2 (~3MHz) */
Name (IN1, 1) /* IN1 differential */
@ -185,6 +186,7 @@ Scope (\_SB.PCI0.I2C0)
Name (_DSD, Package () {
ToUUID ("daffd814-6eba-4d8c-8a91-bc9bbf4aa301"),
Package () {
Package () { "realtek,micbias1", 1 },
Package () { "realtek,in1-differential", 1 },
Package () { "realtek,in2-differential", 0 },
Package () { "realtek,lout1-differential", 1 },