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| author | Furquan Shaikh <furquan@google.com> | 2015-07-10 17:36:49 -0700 |
|---|---|---|
| committer | Patrick Georgi <pgeorgi@google.com> | 2015-07-13 10:12:01 +0200 |
| commit | 657deac015e3779c1cdca837cf0f1b77b93baa54 (patch) | |
| tree | 926fb6f1036bc9927f4cbf1a0d4f4d6246c7f22e /src/mainboard | |
| parent | 25fbe2ad8277a7e5a950920b0f658c1a7c8d30d8 (diff) | |
| download | coreboot-657deac015e3779c1cdca837cf0f1b77b93baa54.tar.xz | |
smaug: Set LDO2 voltage to 1.8V
LDO2 regulator is used as an always-on reference for the droop alert
circuit. Set output voltage to match kernel settings.
CQ-DEPEND=CL:284649
BUG=chrome-os-partner:42305
BRANCH=None
TEST=Compiles successfully and boots to kernel prompt
Change-Id: I5ef4e266d8ec278dadffa846af8dc49b6d18c37e
Signed-off-by: Patrick Georgi <pgeorgi@chromium.org>
Original-Commit-Id: 611465f6248cba0ddce0083b431cb7ee17bc4b4c
Original-Change-Id: I58cc473452b871392d813387707a0b8288e46561
Original-Signed-off-by: Furquan Shaikh <furquan@google.com>
Original-Reviewed-on: https://chromium-review.googlesource.com/284879
Original-Tested-by: Furquan Shaikh <furquan@chromium.org>
Original-Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Original-Commit-Queue: Furquan Shaikh <furquan@chromium.org>
Original-Trybot-Ready: Furquan Shaikh <furquan@chromium.org>
Reviewed-on: http://review.coreboot.org/10900
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
Tested-by: build bot (Jenkins)
Diffstat (limited to 'src/mainboard')
| -rw-r--r-- | src/mainboard/google/smaug/pmic.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/src/mainboard/google/smaug/pmic.c b/src/mainboard/google/smaug/pmic.c index 73aa0de83c..b10e67b0ee 100644 --- a/src/mainboard/google/smaug/pmic.c +++ b/src/mainboard/google/smaug/pmic.c @@ -95,6 +95,13 @@ void pmic_init(unsigned bus) pmic_write_reg_77620(bus, MAX77620_CNFG2SD_REG, 0x04, 1); pmic_write_reg_77620(bus, MAX77620_SD1_REG, 0x2a, 1); + /* + * MAX77620: Set LDO2 output to 1.8V. LDO2 is used as always-on + * reference for the droop alert circuit. Match this setting with what + * the kernel expects. + */ + pmic_write_reg_77620(bus, MAX77620_CNFG1_L2_REG, 0x14, 1); + /* MAX77621: Set VOUT_REG to 1.0V - CPU VREG */ pmic_write_reg_77621(bus, MAX77621_VOUT_REG, 0xBF, 1); |