diff options
| author | Ting Shen <phoenixshen@google.com> | 2023-02-07 16:39:20 +0800 |
|---|---|---|
| committer | Chromeos LUCI <chromeos-scoped@luci-project-accounts.iam.gserviceaccount.com> | 2023-02-08 05:50:32 +0000 |
| commit | efaba4f3b6d014fd77782e35b6a184d39c6c50b4 (patch) | |
| tree | 4f87e0697ba118a75d137e9ce6c9e7c70e046cdf /driver/ppc/rt1739.c | |
| parent | f0a70403e25db4affec4e81405907876f38f39ee (diff) | |
| download | chrome-ec-efaba4f3b6d014fd77782e35b6a184d39c6c50b4.tar.gz | |
ppc/rt1739: implement dead battery boot
If rt1739 seems to be the only power source of the system, don't turn
off its HV sink path.
BUG=b:267412033
TEST=Verify that PPC is able to supply power in follow scenarios:
1) power on without battery
2) sysjump without battery
3) ec reset without battery
BRANCH=none
LOW_COVERAGE_REASON=early bringup
Change-Id: I13d291edfc78f6e1491b3c4a0d8e2e661925004d
Signed-off-by: Ting Shen <phoenixshen@google.com>
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/ec/+/4225988
Commit-Queue: Ting Shen <phoenixshen@chromium.org>
Reviewed-by: Eric Yilun Lin <yllin@google.com>
Tested-by: Ting Shen <phoenixshen@chromium.org>
Diffstat (limited to 'driver/ppc/rt1739.c')
| -rw-r--r-- | driver/ppc/rt1739.c | 37 |
1 files changed, 34 insertions, 3 deletions
diff --git a/driver/ppc/rt1739.c b/driver/ppc/rt1739.c index 8412a3937f..c660320b9b 100644 --- a/driver/ppc/rt1739.c +++ b/driver/ppc/rt1739.c @@ -5,6 +5,7 @@ /* Richtek RT1739 USB-C Power Path Controller */ #include "atomic.h" +#include "battery.h" #include "common.h" #include "config.h" #include "console.h" @@ -247,12 +248,42 @@ static int rt1739_set_frs_enable(int port, int enable) static int rt1739_init(int port) { - int device_id, oc_setting; + int device_id, oc_setting, sys_ctrl, vbus_switch_ctrl; + bool batt_connected = false; atomic_clear(&flags[port]); - RETURN_ERROR(write_reg(port, RT1739_REG_SW_RESET, RT1739_SW_RESET)); - usleep(1 * MSEC); + RETURN_ERROR(read_reg(port, RT1739_REG_SYS_CTRL, &sys_ctrl)); + RETURN_ERROR( + read_reg(port, RT1739_REG_VBUS_SWITCH_CTRL, &vbus_switch_ctrl)); + + if (IS_ENABLED(CONFIG_BATTERY_FUEL_GAUGE)) { + batt_connected = (battery_get_disconnect_state() == + BATTERY_NOT_DISCONNECTED); + } + + if (sys_ctrl & RT1739_DEAD_BATTERY) { + /* + * Dead battery boot, see b/267412033#comment6 for the init + * sequence. + */ + RETURN_ERROR( + write_reg(port, RT1739_REG_SYS_CTRL, + RT1739_DEAD_BATTERY | RT1739_SHUTDOWN_OFF)); + rt1739_vbus_sink_enable(port, true); + RETURN_ERROR(write_reg(port, RT1739_REG_SYS_CTRL, + RT1739_OT_EN | RT1739_SHUTDOWN_OFF)); + } else if (batt_connected || !(vbus_switch_ctrl & RT1739_HV_SNK_EN)) { + /* + * If rt1739 is not sinking, or there's a working battery, + * we can reset its registers safely. + * + * Otherwise, don't touch the VBUS_SWITCH_CTRL reg. + */ + RETURN_ERROR( + write_reg(port, RT1739_REG_SW_RESET, RT1739_SW_RESET)); + usleep(1 * MSEC); + } RETURN_ERROR(write_reg(port, RT1739_REG_SYS_CTRL, RT1739_OT_EN | RT1739_SHUTDOWN_OFF)); |