diff options
| author | Shawn Nematbakhsh <shawnn@chromium.org> | 2016-04-27 13:54:52 -0700 |
|---|---|---|
| committer | chrome-bot <chrome-bot@chromium.org> | 2016-04-27 23:58:04 -0700 |
| commit | ab27f42f5636af5fba50a871e391018cb1c885bf (patch) | |
| tree | b3c6e464b0b8e5a44b61c6e814220ef4293b0c92 /chip/mec1322/pwm.c | |
| parent | 8d742588ade84d45ce6fe7ca069d6087fac6928c (diff) | |
| download | chrome-ec-ab27f42f5636af5fba50a871e391018cb1c885bf.tar.gz | |
pwm: Add PWM_CONFIG_DSLEEP config flag
Add PWM_CONFIG_DSLEEP PWM config flag, which can be set to keep a
channel active during low-power idle / deep sleep. Currently it's
supported by npcx and mec1322.
BUG=chrome-os-partner:52783
BRANCH=glados
TEST=Manual on chell w/ subsequent commit + CONFIG_LOW_POWER_S0. Verify
KB backlight does not flicker during idle.
Change-Id: Ib9df5879aaa7dfa5764de1583496de84d40d2bb5
Signed-off-by: Shawn Nematbakhsh <shawnn@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/341002
Commit-Ready: Shawn N <shawnn@chromium.org>
Tested-by: Shawn N <shawnn@chromium.org>
Reviewed-by: Vincent Palatin <vpalatin@chromium.org>
Reviewed-by: Todd Broch <tbroch@chromium.org>
Diffstat (limited to 'chip/mec1322/pwm.c')
| -rw-r--r-- | chip/mec1322/pwm.c | 20 |
1 files changed, 18 insertions, 2 deletions
diff --git a/chip/mec1322/pwm.c b/chip/mec1322/pwm.c index 1643664855..0c3f97baa3 100644 --- a/chip/mec1322/pwm.c +++ b/chip/mec1322/pwm.c @@ -11,14 +11,25 @@ #include "registers.h" #include "util.h" +/* + * PWMs that must remain active in low-power idle - MEC1322_PCR_EC_SLP_EN + * bit mask. + */ +static uint32_t pwm_keep_awake_mask; + void pwm_enable(enum pwm_channel ch, int enabled) { int id = pwm_channels[ch].channel; - if (enabled) + if (enabled) { MEC1322_PWM_CFG(id) |= 0x1; - else + if (pwm_channels[ch].flags & PWM_CONFIG_DSLEEP) + pwm_keep_awake_mask |= + MEC1322_PCR_EC_SLP_EN_PWM(id); + } else { MEC1322_PWM_CFG(id) &= ~0x1; + pwm_keep_awake_mask &= ~MEC1322_PCR_EC_SLP_EN_PWM(id); + } } int pwm_get_enabled(enum pwm_channel ch) @@ -44,6 +55,11 @@ int pwm_get_duty(enum pwm_channel ch) return MEC1322_PWM_ON(pwm_channels[ch].channel); } +inline uint32_t pwm_get_keep_awake_mask(void) +{ + return pwm_keep_awake_mask; +} + static void pwm_configure(int ch, int active_low, int clock_low) { /* |