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 <trini@konsulko.com>
Cc: Albert Aribaud <albert.u.boot@aribaud.net>
Cc: Igor Grinberg <grinberg@compulab.co.il>
Signed-off-by: Nikita Kiryanov <nikita@compulab.co.il>
Reviewed-by: Tom Rini <trini@konsulko.com>

diff --git a/board/compulab/cm_t43/cm_t43.c b/board/compulab/cm_t43/cm_t43.c
index 445b609e15d2f0319571095fade16ad7d73718b3..0d5da6f5e9dcf68faafa94403559706bbd1c5acc 100644 (file)
--- 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;
 }