[U-Boot] [PATCH] OMAP3: pandora: enable battery backup capacitor

[Grazvydas Ignotas]

CCing Sandeep.

On Thu, Apr 29, 2010 at 5:52 PM, Grazvydas Ignotas <notasas at gmail.com> wrote:
> 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 at gmail.com>
> ---
>  board/pandora/pandora.c |    9 +++++++++
>  1 files changed, 9 insertions(+), 0 deletions(-)
>
> diff --git a/board/pandora/pandora.c b/board/pandora/pandora.c
> index 75e4330..355e9ea 100644
> --- a/board/pandora/pandora.c
> +++ b/board/pandora/pandora.c
> @@ -37,6 +37,10 @@
>  #include <asm/mach-types.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
>  * 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;
> --
> 1.6.3.3
>
>