From dccaaaeb990828573dfa242dfc6c29851d38e32c Mon Sep 17 00:00:00 2001 From: Nikita Kiryanov Date: Fri, 19 Feb 2016 19:19:47 +0200 Subject: [PATCH] arm: am437x: cm-t43: set tps fseal bit Set TPS65218 FSEAL bit to 1 so that RTC could be powered using on-board 3V battery. This is necessary so that time and date will survive reboots and power offs. Cc: Tom Rini Cc: Albert Aribaud Cc: Igor Grinberg Signed-off-by: Nikita Kiryanov Reviewed-by: Tom Rini --- board/compulab/cm_t43/cm_t43.c | 9 ++++++++- 1 file changed, 8 insertions(+), 1 deletion(-) diff --git a/board/compulab/cm_t43/cm_t43.c b/board/compulab/cm_t43/cm_t43.c index 445b609e15..0d5da6f5e9 100644 --- a/board/compulab/cm_t43/cm_t43.c +++ b/board/compulab/cm_t43/cm_t43.c @@ -23,11 +23,18 @@ static struct ctrl_dev *cdev = (struct ctrl_dev *)CTRL_DEVICE_BASE; int power_init_board(void) { struct pmic *p; + uchar tps_status = 0; power_tps65218_init(I2C_PMIC); p = pmic_get("TPS65218_PMIC"); - if (p && !pmic_probe(p)) + if (p && !pmic_probe(p)) { puts("PMIC: TPS65218\n"); + /* We don't care if fseal is locked, but we do need it set */ + tps65218_lock_fseal(); + tps65218_reg_read(TPS65218_STATUS, &tps_status); + if (!(tps_status & TPS65218_FSEAL)) + printf("WARNING: RTC not backed by battery!\n"); + } return 0; } -- 2.30.2