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OMAP3: pandora: enable battery backup capacitor

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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 <notasas@gmail.com>
Signed-off-by: Sandeep Paulraj <s-paulraj@ti.com>
This commit is contained in:
Grazvydas Ignotas 2010-06-08 17:19:22 -04:00 • committed by Sandeep Paulraj
parent 2391174048
commit 5246d01edd
1 changed files with 9 additions and 0 deletions
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9
board/pandora/pandora.c
View file

@ -37,6 +37,10 @@
#include <asm/mach-types.h> #include <asm/mach-types.h>
#include "pandora.h" #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 * Routine: board_init
* Description: Early hardware init. * Description: Early hardware init.
@ -78,6 +82,11 @@ int misc_init_r(void)
writel(GPIO28, &gpio5_base->setdataout); writel(GPIO28, &gpio5_base->setdataout);
writel(GPIO4, &gpio6_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(); dieid_num_r();
return 0; return 0;