On Tue, 2010-02-23 at 18:10 -0600, Olaya, Margarita wrote:
> From: Misael Lopez Cruz <x0052729@xxxxxx>
>
> TWL6030 codec device can be powered-up/down through a specific register
> writes sequence. These sequences can be used when no gpio line is
> provided for AUDPWRON.
>
> When the codec is powered-up in this way, automatic power-down sequence
> (triggered by thermal shutdown) is not possible.
>
> Signed-off-by: Misael Lopez Cruz <x0052729@xxxxxx>
> Signed-off-by: Jorge Eduardo Candelaria <jorge.candelaria@xxxxxx>
> Signed-off-by: Margarita Olaya Cabrera <magi.olaya@xxxxxx>
> ---
> sound/soc/codecs/twl6030.c | 112 ++++++++++++++++++++++++++++++++++++++-----
> sound/soc/codecs/twl6030.h | 16 ++++++
> 2 files changed, 115 insertions(+), 13 deletions(-)
>
> diff --git a/sound/soc/codecs/twl6030.c b/sound/soc/codecs/twl6030.c
> index 8b52aa1..ec838b1 100644
> --- a/sound/soc/codecs/twl6030.c
> +++ b/sound/soc/codecs/twl6030.c
> @@ -244,6 +244,88 @@ static void twl6030_init_vdd_regs(struct snd_soc_codec *codec)
> }
> }
>
> +/* twl6030 codec manual power-up sequence */
> +static void twl6030_power_up(struct snd_soc_codec *codec)
> +{
> + u8 ncpctl, ldoctl, lppllctl, accctl;
> +
> + ncpctl = twl6030_read_reg_cache(codec, TWL6030_REG_NCPCTL);
> + ldoctl = twl6030_read_reg_cache(codec, TWL6030_REG_LDOCTL);
> + lppllctl = twl6030_read_reg_cache(codec, TWL6030_REG_LPPLLCTL);
> + accctl = twl6030_read_reg_cache(codec, TWL6030_REG_ACCCTL);
> +
> + /* enable reference system */
> + ldoctl |= TWL6030_REFENA;
> + twl6030_write(codec, TWL6030_REG_LDOCTL, ldoctl);
> + mdelay(10);
> + /* enable internal oscillator */
> + ldoctl |= TWL6030_OSCENA;
> + twl6030_write(codec, TWL6030_REG_LDOCTL, ldoctl);
> + udelay(10);
> + /* enable high-side ldo */
> + ldoctl |= TWL6030_HSLDOENA;
> + twl6030_write(codec, TWL6030_REG_LDOCTL, ldoctl);
> + udelay(244);
> + /* enable negative charge pump */
> + ncpctl |= TWL6030_NCPENA | TWL6030_NCPOPEN;
> + twl6030_write(codec, TWL6030_REG_NCPCTL, ncpctl);
> + udelay(488);
> + /* enable low-side ldo */
> + ldoctl |= TWL6030_LSLDOENA;
> + twl6030_write(codec, TWL6030_REG_LDOCTL, ldoctl);
> + udelay(244);
> + /* enable low-power pll */
> + lppllctl |= TWL6030_LPLLENA;
> + twl6030_write(codec, TWL6030_REG_LPPLLCTL, lppllctl);
> + /* reset state machine */
> + accctl |= TWL6030_RESETSPLIT;
> + twl6030_write(codec, TWL6030_REG_ACCCTL, accctl);
> + mdelay(5);
> + accctl &= ~TWL6030_RESETSPLIT;
> + twl6030_write(codec, TWL6030_REG_ACCCTL, accctl);
> + /* disable internal oscillator */
> + ldoctl &= ~TWL6030_OSCENA;
> + twl6030_write(codec, TWL6030_REG_LDOCTL, ldoctl);
> +}
> +
> +/* twl6030 codec manual power-down sequence */
> +static void twl6030_power_down(struct snd_soc_codec *codec)
> +{
> + u8 ncpctl, ldoctl, lppllctl, accctl;
> +
> + ncpctl = twl6030_read_reg_cache(codec, TWL6030_REG_NCPCTL);
> + ldoctl = twl6030_read_reg_cache(codec, TWL6030_REG_LDOCTL);
> + lppllctl = twl6030_read_reg_cache(codec, TWL6030_REG_LPPLLCTL);
> + accctl = twl6030_read_reg_cache(codec, TWL6030_REG_ACCCTL);
> +
> + /* enable internal oscillator */
> + ldoctl |= TWL6030_OSCENA;
> + twl6030_write(codec, TWL6030_REG_LDOCTL, ldoctl);
> + udelay(10);
> + /* disable low-power pll */
> + lppllctl &= ~TWL6030_LPLLENA;
> + twl6030_write(codec, TWL6030_REG_LPPLLCTL, lppllctl);
> + /* disable low-side ldo */
> + ldoctl &= ~TWL6030_LSLDOENA;
> + twl6030_write(codec, TWL6030_REG_LDOCTL, ldoctl);
> + udelay(244);
> + /* disable negative charge pump */
> + ncpctl &= ~(TWL6030_NCPENA | TWL6030_NCPOPEN);
> + twl6030_write(codec, TWL6030_REG_NCPCTL, ncpctl);
> + udelay(488);
> + /* disable high-side ldo */
> + ldoctl &= ~TWL6030_HSLDOENA;
> + twl6030_write(codec, TWL6030_REG_LDOCTL, ldoctl);
> + udelay(244);
> + /* disable internal oscillator */
> + ldoctl &= ~TWL6030_OSCENA;
> + twl6030_write(codec, TWL6030_REG_LDOCTL, ldoctl);
> + /* disable reference system */
> + ldoctl &= ~TWL6030_REFENA;
> + twl6030_write(codec, TWL6030_REG_LDOCTL, ldoctl);
> + mdelay(10);
> +}
> +
> /*
Some large mdelays here again.
Liam
--
Freelance Developer, SlimLogic Ltd
ASoC and Voltage Regulator Maintainer.
http://www.slimlogic.co.uk
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