Re: [PATCH/RFC] ARM: OMAP: Initialize MADC clock divider and clock

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Not enough coffee this morning!

After a comment period I will resubmit these two patches with proper
signed-off-by, etc.

Steve

On Sat, May 30, 2009 at 6:40 AM, Steve Sakoman <sakoman@xxxxxxxxx> wrote:
> Though the comment in clocks_init claims to initialize the MADC
> clocks, it wasn't actually being done.  This patch implements minimal
> MADC clock initialization.
>
> Compile/run tested on Overo (prior to patch MADC access would always timeout)
>
> diff --git a/drivers/mfd/twl4030-core.c b/drivers/mfd/twl4030-core.c
> index 769b34b..c5ca36d 100644
> --- a/drivers/mfd/twl4030-core.c
> +++ b/drivers/mfd/twl4030-core.c
> @@ -159,6 +159,7 @@
>
>  /* Few power values */
>  #define R_CFG_BOOT                     0x05
> +#define R_GPBR1                                0x0C
>  #define R_PROTECT_KEY                  0x0E
>
>  /* access control values for R_PROTECT_KEY */
> @@ -166,6 +167,10 @@
>  #define KEY_UNLOCK2                    0xec
>  #define KEY_LOCK                       0x00
>
> +/* MADC clock values for R_GPBR1 */
> +#define MADC_HFCLK_EN                  0x80
> +#define DEFAULT_MADC_CLK_EN            0x10
> +
>  /* some fields in R_CFG_BOOT */
>  #define HFCLK_FREQ_19p2_MHZ            (1 << 0)
>  #define HFCLK_FREQ_26_MHZ              (2 << 0)
> @@ -717,6 +722,11 @@ static void __init clocks_init(struct device *dev)
>        ctrl |= HIGH_PERF_SQ;
>        e |= unprotect_pm_master();
>        /* effect->MADC+USB ck en */
> +
> +       if (twl_has_madc())
> +               e |= twl4030_i2c_write_u8(TWL4030_MODULE_INTBR,
> +                               MADC_HFCLK_EN | DEFAULT_MADC_CLK_EN, R_GPBR1);
> +
>        e |= twl4030_i2c_write_u8(TWL4030_MODULE_PM_MASTER, ctrl, R_CFG_BOOT);
>        e |= protect_pm_master();
>
--
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