Stefan Reinauer (stefan.reinauer@coreboot.org) just uploaded a new patch set to gerrit, which you can find at http://review.coreboot.org/9499
-gerrit
commit ca1840ea902f9b3e99303490a99802d42f4515c3 Author: Ben Zhang benzh@chromium.org Date: Fri Nov 21 11:17:53 2014 -0800
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 --- src/mainboard/google/samus/acpi/mainboard.asl | 2 ++ 1 file changed, 2 insertions(+)
diff --git a/src/mainboard/google/samus/acpi/mainboard.asl b/src/mainboard/google/samus/acpi/mainboard.asl index 54a46d5..287f595 100644 --- a/src/mainboard/google/samus/acpi/mainboard.asl +++ b/src/mainboard/google/samus/acpi/mainboard.asl @@ -177,6 +177,7 @@ 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 */ @@ -193,6 +194,7 @@ 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 },