From 5246d01edd8935e04cdf79a5b9a03874509a31b1 Mon Sep 17 00:00:00 2001 From: Grazvydas Ignotas Date: Tue, 8 Jun 2010 17:19:22 -0400 Subject: [PATCH] OMAP3: pandora: enable battery backup capacitor Pandora has a capacitor connected as backup battery, which allows retaining RTC for some time while main battery is removed. Enable backup battery charge function to charge that capacitor. Signed-off-by: Grazvydas Ignotas Signed-off-by: Sandeep Paulraj --- board/pandora/pandora.c | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/board/pandora/pandora.c b/board/pandora/pandora.c index 75e43305b3..355e9eaa8f 100644 --- a/board/pandora/pandora.c +++ b/board/pandora/pandora.c @@ -37,6 +37,10 @@ #include #include "pandora.h" +#define TWL4030_BB_CFG_BBCHEN (1 << 4) +#define TWL4030_BB_CFG_BBSEL_3200MV (3 << 2) +#define TWL4030_BB_CFG_BBISEL_500UA 2 + /* * Routine: board_init * Description: Early hardware init. @@ -78,6 +82,11 @@ int misc_init_r(void) writel(GPIO28, &gpio5_base->setdataout); writel(GPIO4, &gpio6_base->setdataout); + /* Enable battery backup capacitor (3.2V, 0.5mA charge current) */ + twl4030_i2c_write_u8(TWL4030_CHIP_PM_RECEIVER, + TWL4030_BB_CFG_BBCHEN | TWL4030_BB_CFG_BBSEL_3200MV | + TWL4030_BB_CFG_BBISEL_500UA, TWL4030_PM_RECEIVER_BB_CFG); + dieid_num_r(); return 0; -- 2.39.5