diff options
| author | Shawn Nematbakhsh <shawnn@chromium.org> | 2015-08-12 18:05:22 -0700 |
|---|---|---|
| committer | chrome-bot <chrome-bot@chromium.org> | 2016-01-26 23:59:50 -0800 |
| commit | 2e37a50b377fa169f2fa0d4e103e903343ad63f6 (patch) | |
| tree | cbb5b565ceb74835f8c00f26f55a4ab01fdf6753 | |
| parent | 9e0506d331073a872a406ed693400756085da3cb (diff) | |
| download | chrome-ec-2e37a50b377fa169f2fa0d4e103e903343ad63f6.tar.gz | |
glados / chell: Power Optimize S0ix PMIC VRs
Allow VCCIO to decay to 0 and reduce the voltage of V0.85A supply in
S0ix.
BUG=chrome-os-partner:43908
TEST=Stress-test glados stability coming into and out of S0ix
BRANCH=glados
Signed-off-by: Shawn Nematbakhsh <shawnn@chromium.org>
Change-Id: I5aa61164c43ac624cef86f478919294e4cd4e581
Reviewed-on: https://chromium-review.googlesource.com/293345
Commit-Ready: Shawn N <shawnn@chromium.org>
Tested-by: Shawn N <shawnn@chromium.org>
Reviewed-by: Duncan Laurie <dlaurie@chromium.org>
| -rw-r--r-- | board/chell/board.c | 12 | ||||
| -rw-r--r-- | board/glados/board.c | 12 |
2 files changed, 24 insertions, 0 deletions
diff --git a/board/chell/board.c b/board/chell/board.c index b0e4ec2ac5..b05926bb50 100644 --- a/board/chell/board.c +++ b/board/chell/board.c @@ -226,12 +226,24 @@ static void board_pmic_init(void) if (system_jumped_to_this_image()) return; + /* Set CSDECAYEN / VCCIO decays to 0V at assertion of SLP_S0# */ + i2c_write8(I2C_PORT_PMIC, I2C_ADDR_BD99992, 0x30, 0x4a); + + /* + * Set V100ACNT / V1.00A Control Register: + * Nominal output = 1.0V. + */ + i2c_write8(I2C_PORT_PMIC, I2C_ADDR_BD99992, 0x37, 0x1a); + /* * Set V085ACNT / V0.85A Control Register: * Lower power mode = 0.7V. * Nominal output = 1.0V. */ i2c_write8(I2C_PORT_PMIC, I2C_ADDR_BD99992, 0x38, 0x7a); + + /* VRMODECTRL - enable low-power mode for VCCIO and V0.85A */ + i2c_write8(I2C_PORT_PMIC, I2C_ADDR_BD99992, 0x3b, 0x18); } DECLARE_HOOK(HOOK_INIT, board_pmic_init, HOOK_PRIO_DEFAULT); diff --git a/board/glados/board.c b/board/glados/board.c index eb39af9f4e..8bfd12a485 100644 --- a/board/glados/board.c +++ b/board/glados/board.c @@ -230,12 +230,24 @@ static void board_pmic_init(void) if (system_jumped_to_this_image()) return; + /* Set CSDECAYEN / VCCIO decays to 0V at assertion of SLP_S0# */ + i2c_write8(I2C_PORT_PMIC, I2C_ADDR_BD99992, 0x30, 0x4a); + + /* + * Set V100ACNT / V1.00A Control Register: + * Nominal output = 1.0V. + */ + i2c_write8(I2C_PORT_PMIC, I2C_ADDR_BD99992, 0x37, 0x1a); + /* * Set V085ACNT / V0.85A Control Register: * Lower power mode = 0.7V. * Nominal output = 1.0V. */ i2c_write8(I2C_PORT_PMIC, I2C_ADDR_BD99992, 0x38, 0x7a); + + /* VRMODECTRL - enable low-power mode for VCCIO and V0.85A */ + i2c_write8(I2C_PORT_PMIC, I2C_ADDR_BD99992, 0x3b, 0x18); } DECLARE_HOOK(HOOK_INIT, board_pmic_init, HOOK_PRIO_DEFAULT); |