> -----Original Message----- > From: Liam Girdwood [mailto:lrg@xxxxxxxxxxxxxxx] > Sent: Wednesday, February 24, 2010 4:41 AM > To: Olaya, Margarita > Cc: alsa-devel@xxxxxxxxxxxxxxxx; linux-omap@xxxxxxxxxxxxxxx; broonie@xxxxxxxxxxxxxxxxxxxxxxxxxxx > Subject: Re: [PATCHv4 3/7] ASoC: TWL6030: Manual power-up/down sequences > > 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 Ok, I'll verify and change them. - Margarita > > -- > Freelance Developer, SlimLogic Ltd > ASoC and Voltage Regulator Maintainer. > http://www.slimlogic.co.uk _______________________________________________ Alsa-devel mailing list Alsa-devel@xxxxxxxxxxxxxxxx http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
