From: Jonathan Cameron <jic23-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org> To: Tony Lindgren <tony-4v6yS6AI5VpBDgjK7y7TUQ@public.gmane.org> Cc: Hartmut Knaack <knaack.h-Mmb7MZpHnFY@public.gmane.org>, Lars-Peter Clausen <lars-Qo5EllUWu/uELgA04lAiVw@public.gmane.org>, Peter Meerwald-Stadler <pmeerw-jW+XmwGofnusTnJN9+BGXg@public.gmane.org>, linux-iio-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, linux-omap-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, Marcel Partap <mpartap-hi6Y0CQ0nG0@public.gmane.org>, Michael Scott <michael.scott-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org>, Sebastian Reichel <sre-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org> Subject: Re: [PATCH 1/3] iio: adc: cpcap: Fix default register values and battery temperature Date: Wed, 24 May 2017 20:18:31 +0100 [thread overview] Message-ID: <20170524201831.3504c42d@kernel.org> (raw) In-Reply-To: <20170523005146.726-2-tony-4v6yS6AI5VpBDgjK7y7TUQ@public.gmane.org> On Mon, 22 May 2017 17:51:44 -0700 Tony Lindgren <tony-4v6yS6AI5VpBDgjK7y7TUQ@public.gmane.org> wrote: > Looking at the register dumps from Android kernel on droid 4, I noticed > the values with the mainline kernel don't match. Let's fix this by > initializing the ADC registers to what Android does. > > For getting correct values from the battery thermistor, we need to > toggle the CPCAP_BIT_THERMBIAS_EN when measuring battery temperature > to get correct battery temperatures. And looks like we also need to > wait a little bit before reading the battery temperature as otherwise > the results are inaccurate. > > Cc: Marcel Partap <mpartap-hi6Y0CQ0nG0@public.gmane.org> > Cc: Michael Scott <michael.scott-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org> > Cc: Sebastian Reichel <sre-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org> > Signed-off-by: Tony Lindgren <tony-4v6yS6AI5VpBDgjK7y7TUQ@public.gmane.org> Applied to the togreg branch of iio.git and will be shortly pushed out as testing for the autobuilders to play with it. Thanks, Jonathan > --- > drivers/iio/adc/cpcap-adc.c | 58 ++++++++++++++++++++++++++++++++++++++------- > 1 file changed, 50 insertions(+), 8 deletions(-) > > diff --git a/drivers/iio/adc/cpcap-adc.c b/drivers/iio/adc/cpcap-adc.c > --- a/drivers/iio/adc/cpcap-adc.c > +++ b/drivers/iio/adc/cpcap-adc.c > @@ -52,6 +52,10 @@ > #define CPCAP_BIT_RAND0 BIT(1) /* Set with CAL_MODE */ > #define CPCAP_BIT_ADEN BIT(0) /* Currently unused */ > > +#define CPCAP_REG_ADCC1_DEFAULTS (CPCAP_BIT_ADEN_AUTO_CLR | \ > + CPCAP_BIT_ADC_CLK_SEL0 | \ > + CPCAP_BIT_RAND1) > + > /* Register CPCAP_REG_ADCC2 bits */ > #define CPCAP_BIT_CAL_FACTOR_ENABLE BIT(15) /* Currently unused */ > #define CPCAP_BIT_BATDETB_EN BIT(14) /* Currently unused */ > @@ -62,7 +66,7 @@ > #define CPCAP_BIT_ADC_PS_FACTOR0 BIT(9) > #define CPCAP_BIT_AD4_SELECT BIT(8) /* Currently unused */ > #define CPCAP_BIT_ADC_BUSY BIT(7) /* Currently unused */ > -#define CPCAP_BIT_THERMBIAS_EN BIT(6) /* Currently unused */ > +#define CPCAP_BIT_THERMBIAS_EN BIT(6) /* Bias for AD0_BATTDETB */ > #define CPCAP_BIT_ADTRIG_DIS BIT(5) /* Disable interrupt */ > #define CPCAP_BIT_LIADC BIT(4) /* Currently unused */ > #define CPCAP_BIT_TS_REFEN BIT(3) /* Currently unused */ > @@ -70,6 +74,13 @@ > #define CPCAP_BIT_TS_M1 BIT(1) /* Currently unused */ > #define CPCAP_BIT_TS_M0 BIT(0) /* Currently unused */ > > +#define CPCAP_REG_ADCC2_DEFAULTS (CPCAP_BIT_AD4_SELECT | \ > + CPCAP_BIT_ADTRIG_DIS | \ > + CPCAP_BIT_ADTRIG_DIS | \ > + CPCAP_BIT_LIADC | \ > + CPCAP_BIT_TS_M2 | \ > + CPCAP_BIT_TS_M1) > + > #define CPCAP_MAX_TEMP_LVL 27 > #define CPCAP_FOUR_POINT_TWO_ADC 801 > #define ST_ADC_CAL_CHRGI_HIGH_THRESHOLD 530 > @@ -124,10 +135,10 @@ struct cpcap_adc { > */ > enum cpcap_adc_channel { > /* Bank0 channels */ > - CPCAP_ADC_AD0_BATTDETB, /* Battery detection */ > + CPCAP_ADC_AD0, /* Battery temperature */ > CPCAP_ADC_BATTP, /* Battery voltage */ > CPCAP_ADC_VBUS, /* USB VBUS voltage */ > - CPCAP_ADC_AD3, /* Battery temperature when charging */ > + CPCAP_ADC_AD3, /* Die temperature when charging */ > CPCAP_ADC_BPLUS_AD4, /* Another battery or system voltage */ > CPCAP_ADC_CHG_ISENSE, /* Calibrated charge current */ > CPCAP_ADC_BATTI, /* Calibrated system current */ > @@ -217,7 +228,7 @@ struct cpcap_adc_request { > /* Phasing table for channels. Note that channels 16 & 17 use BATTP and BATTI */ > static const struct cpcap_adc_phasing_tbl bank_phasing[] = { > /* Bank0 */ > - [CPCAP_ADC_AD0_BATTDETB] = {0, 0x80, 0x80, 0, 1023}, > + [CPCAP_ADC_AD0] = {0, 0x80, 0x80, 0, 1023}, > [CPCAP_ADC_BATTP] = {0, 0x80, 0x80, 0, 1023}, > [CPCAP_ADC_VBUS] = {0, 0x80, 0x80, 0, 1023}, > [CPCAP_ADC_AD3] = {0, 0x80, 0x80, 0, 1023}, > @@ -243,7 +254,7 @@ static const struct cpcap_adc_phasing_tbl bank_phasing[] = { > */ > static struct cpcap_adc_conversion_tbl bank_conversion[] = { > /* Bank0 */ > - [CPCAP_ADC_AD0_BATTDETB] = { > + [CPCAP_ADC_AD0] = { > IIO_CHAN_INFO_PROCESSED, 0, 0, 0, 1, 1, > }, > [CPCAP_ADC_BATTP] = { > @@ -541,6 +552,15 @@ static void cpcap_adc_setup_bank(struct cpcap_adc *ddata, > return; > > switch (req->channel) { > + case CPCAP_ADC_AD0: > + value2 |= CPCAP_BIT_THERMBIAS_EN; > + error = regmap_update_bits(ddata->reg, CPCAP_REG_ADCC2, > + CPCAP_BIT_THERMBIAS_EN, > + value2); > + if (error) > + return; > + usleep_range(800, 1000); > + break; > case CPCAP_ADC_AD8 ... CPCAP_ADC_TSY2_AD15: > value1 |= CPCAP_BIT_AD_SEL1; > break; > @@ -583,7 +603,8 @@ static void cpcap_adc_setup_bank(struct cpcap_adc *ddata, > error = regmap_update_bits(ddata->reg, CPCAP_REG_ADCC2, > CPCAP_BIT_ATOX_PS_FACTOR | > CPCAP_BIT_ADC_PS_FACTOR1 | > - CPCAP_BIT_ADC_PS_FACTOR0, > + CPCAP_BIT_ADC_PS_FACTOR0 | > + CPCAP_BIT_THERMBIAS_EN, > value2); > if (error) > return; > @@ -664,6 +685,21 @@ static int cpcap_adc_start_bank(struct cpcap_adc *ddata, > return error; > } > > +static int cpcap_adc_stop_bank(struct cpcap_adc *ddata) > +{ > + int error; > + > + error = regmap_update_bits(ddata->reg, CPCAP_REG_ADCC1, > + 0xffff, > + CPCAP_REG_ADCC1_DEFAULTS); > + if (error) > + return error; > + > + return regmap_update_bits(ddata->reg, CPCAP_REG_ADCC2, > + 0xffff, > + CPCAP_REG_ADCC2_DEFAULTS); > +} > + > static void cpcap_adc_phase(struct cpcap_adc_request *req) > { > const struct cpcap_adc_conversion_tbl *conv_tbl = req->conv_tbl; > @@ -758,7 +794,7 @@ static void cpcap_adc_convert(struct cpcap_adc_request *req) > return; > > /* Temperatures use a lookup table instead of conversion table */ > - if ((req->channel == CPCAP_ADC_AD0_BATTDETB) || > + if ((req->channel == CPCAP_ADC_AD0) || > (req->channel == CPCAP_ADC_AD3)) { > req->result = > cpcap_adc_table_to_millicelcius(req->result); > @@ -820,7 +856,7 @@ static int cpcap_adc_init_request(struct cpcap_adc_request *req, > req->conv_tbl = bank_conversion; > > switch (channel) { > - case CPCAP_ADC_AD0_BATTDETB ... CPCAP_ADC_USB_ID: > + case CPCAP_ADC_AD0 ... CPCAP_ADC_USB_ID: > req->bank_index = channel; > break; > case CPCAP_ADC_AD8 ... CPCAP_ADC_TSY2_AD15: > @@ -860,6 +896,9 @@ static int cpcap_adc_read(struct iio_dev *indio_dev, > error = regmap_read(ddata->reg, chan->address, val); > if (error) > goto err_unlock; > + error = cpcap_adc_stop_bank(ddata); > + if (error) > + goto err_unlock; > mutex_unlock(&ddata->lock); > break; > case IIO_CHAN_INFO_PROCESSED: > @@ -870,6 +909,9 @@ static int cpcap_adc_read(struct iio_dev *indio_dev, > error = cpcap_adc_read_bank_scaled(ddata, &req); > if (error) > goto err_unlock; > + error = cpcap_adc_stop_bank(ddata); > + if (error) > + goto err_unlock; > mutex_unlock(&ddata->lock); > *val = req.result; > break;
WARNING: multiple messages have this Message-ID (diff)
From: Jonathan Cameron <jic23@kernel.org> To: Tony Lindgren <tony@atomide.com> Cc: Hartmut Knaack <knaack.h@gmx.de>, Lars-Peter Clausen <lars@metafoo.de>, Peter Meerwald-Stadler <pmeerw@pmeerw.net>, linux-iio@vger.kernel.org, linux-omap@vger.kernel.org, Marcel Partap <mpartap@gmx.net>, Michael Scott <michael.scott@linaro.org>, Sebastian Reichel <sre@kernel.org> Subject: Re: [PATCH 1/3] iio: adc: cpcap: Fix default register values and battery temperature Date: Wed, 24 May 2017 20:18:31 +0100 [thread overview] Message-ID: <20170524201831.3504c42d@kernel.org> (raw) In-Reply-To: <20170523005146.726-2-tony@atomide.com> On Mon, 22 May 2017 17:51:44 -0700 Tony Lindgren <tony@atomide.com> wrote: > Looking at the register dumps from Android kernel on droid 4, I noticed > the values with the mainline kernel don't match. Let's fix this by > initializing the ADC registers to what Android does. > > For getting correct values from the battery thermistor, we need to > toggle the CPCAP_BIT_THERMBIAS_EN when measuring battery temperature > to get correct battery temperatures. And looks like we also need to > wait a little bit before reading the battery temperature as otherwise > the results are inaccurate. > > Cc: Marcel Partap <mpartap@gmx.net> > Cc: Michael Scott <michael.scott@linaro.org> > Cc: Sebastian Reichel <sre@kernel.org> > Signed-off-by: Tony Lindgren <tony@atomide.com> Applied to the togreg branch of iio.git and will be shortly pushed out as testing for the autobuilders to play with it. Thanks, Jonathan > --- > drivers/iio/adc/cpcap-adc.c | 58 ++++++++++++++++++++++++++++++++++++++------- > 1 file changed, 50 insertions(+), 8 deletions(-) > > diff --git a/drivers/iio/adc/cpcap-adc.c b/drivers/iio/adc/cpcap-adc.c > --- a/drivers/iio/adc/cpcap-adc.c > +++ b/drivers/iio/adc/cpcap-adc.c > @@ -52,6 +52,10 @@ > #define CPCAP_BIT_RAND0 BIT(1) /* Set with CAL_MODE */ > #define CPCAP_BIT_ADEN BIT(0) /* Currently unused */ > > +#define CPCAP_REG_ADCC1_DEFAULTS (CPCAP_BIT_ADEN_AUTO_CLR | \ > + CPCAP_BIT_ADC_CLK_SEL0 | \ > + CPCAP_BIT_RAND1) > + > /* Register CPCAP_REG_ADCC2 bits */ > #define CPCAP_BIT_CAL_FACTOR_ENABLE BIT(15) /* Currently unused */ > #define CPCAP_BIT_BATDETB_EN BIT(14) /* Currently unused */ > @@ -62,7 +66,7 @@ > #define CPCAP_BIT_ADC_PS_FACTOR0 BIT(9) > #define CPCAP_BIT_AD4_SELECT BIT(8) /* Currently unused */ > #define CPCAP_BIT_ADC_BUSY BIT(7) /* Currently unused */ > -#define CPCAP_BIT_THERMBIAS_EN BIT(6) /* Currently unused */ > +#define CPCAP_BIT_THERMBIAS_EN BIT(6) /* Bias for AD0_BATTDETB */ > #define CPCAP_BIT_ADTRIG_DIS BIT(5) /* Disable interrupt */ > #define CPCAP_BIT_LIADC BIT(4) /* Currently unused */ > #define CPCAP_BIT_TS_REFEN BIT(3) /* Currently unused */ > @@ -70,6 +74,13 @@ > #define CPCAP_BIT_TS_M1 BIT(1) /* Currently unused */ > #define CPCAP_BIT_TS_M0 BIT(0) /* Currently unused */ > > +#define CPCAP_REG_ADCC2_DEFAULTS (CPCAP_BIT_AD4_SELECT | \ > + CPCAP_BIT_ADTRIG_DIS | \ > + CPCAP_BIT_ADTRIG_DIS | \ > + CPCAP_BIT_LIADC | \ > + CPCAP_BIT_TS_M2 | \ > + CPCAP_BIT_TS_M1) > + > #define CPCAP_MAX_TEMP_LVL 27 > #define CPCAP_FOUR_POINT_TWO_ADC 801 > #define ST_ADC_CAL_CHRGI_HIGH_THRESHOLD 530 > @@ -124,10 +135,10 @@ struct cpcap_adc { > */ > enum cpcap_adc_channel { > /* Bank0 channels */ > - CPCAP_ADC_AD0_BATTDETB, /* Battery detection */ > + CPCAP_ADC_AD0, /* Battery temperature */ > CPCAP_ADC_BATTP, /* Battery voltage */ > CPCAP_ADC_VBUS, /* USB VBUS voltage */ > - CPCAP_ADC_AD3, /* Battery temperature when charging */ > + CPCAP_ADC_AD3, /* Die temperature when charging */ > CPCAP_ADC_BPLUS_AD4, /* Another battery or system voltage */ > CPCAP_ADC_CHG_ISENSE, /* Calibrated charge current */ > CPCAP_ADC_BATTI, /* Calibrated system current */ > @@ -217,7 +228,7 @@ struct cpcap_adc_request { > /* Phasing table for channels. Note that channels 16 & 17 use BATTP and BATTI */ > static const struct cpcap_adc_phasing_tbl bank_phasing[] = { > /* Bank0 */ > - [CPCAP_ADC_AD0_BATTDETB] = {0, 0x80, 0x80, 0, 1023}, > + [CPCAP_ADC_AD0] = {0, 0x80, 0x80, 0, 1023}, > [CPCAP_ADC_BATTP] = {0, 0x80, 0x80, 0, 1023}, > [CPCAP_ADC_VBUS] = {0, 0x80, 0x80, 0, 1023}, > [CPCAP_ADC_AD3] = {0, 0x80, 0x80, 0, 1023}, > @@ -243,7 +254,7 @@ static const struct cpcap_adc_phasing_tbl bank_phasing[] = { > */ > static struct cpcap_adc_conversion_tbl bank_conversion[] = { > /* Bank0 */ > - [CPCAP_ADC_AD0_BATTDETB] = { > + [CPCAP_ADC_AD0] = { > IIO_CHAN_INFO_PROCESSED, 0, 0, 0, 1, 1, > }, > [CPCAP_ADC_BATTP] = { > @@ -541,6 +552,15 @@ static void cpcap_adc_setup_bank(struct cpcap_adc *ddata, > return; > > switch (req->channel) { > + case CPCAP_ADC_AD0: > + value2 |= CPCAP_BIT_THERMBIAS_EN; > + error = regmap_update_bits(ddata->reg, CPCAP_REG_ADCC2, > + CPCAP_BIT_THERMBIAS_EN, > + value2); > + if (error) > + return; > + usleep_range(800, 1000); > + break; > case CPCAP_ADC_AD8 ... CPCAP_ADC_TSY2_AD15: > value1 |= CPCAP_BIT_AD_SEL1; > break; > @@ -583,7 +603,8 @@ static void cpcap_adc_setup_bank(struct cpcap_adc *ddata, > error = regmap_update_bits(ddata->reg, CPCAP_REG_ADCC2, > CPCAP_BIT_ATOX_PS_FACTOR | > CPCAP_BIT_ADC_PS_FACTOR1 | > - CPCAP_BIT_ADC_PS_FACTOR0, > + CPCAP_BIT_ADC_PS_FACTOR0 | > + CPCAP_BIT_THERMBIAS_EN, > value2); > if (error) > return; > @@ -664,6 +685,21 @@ static int cpcap_adc_start_bank(struct cpcap_adc *ddata, > return error; > } > > +static int cpcap_adc_stop_bank(struct cpcap_adc *ddata) > +{ > + int error; > + > + error = regmap_update_bits(ddata->reg, CPCAP_REG_ADCC1, > + 0xffff, > + CPCAP_REG_ADCC1_DEFAULTS); > + if (error) > + return error; > + > + return regmap_update_bits(ddata->reg, CPCAP_REG_ADCC2, > + 0xffff, > + CPCAP_REG_ADCC2_DEFAULTS); > +} > + > static void cpcap_adc_phase(struct cpcap_adc_request *req) > { > const struct cpcap_adc_conversion_tbl *conv_tbl = req->conv_tbl; > @@ -758,7 +794,7 @@ static void cpcap_adc_convert(struct cpcap_adc_request *req) > return; > > /* Temperatures use a lookup table instead of conversion table */ > - if ((req->channel == CPCAP_ADC_AD0_BATTDETB) || > + if ((req->channel == CPCAP_ADC_AD0) || > (req->channel == CPCAP_ADC_AD3)) { > req->result = > cpcap_adc_table_to_millicelcius(req->result); > @@ -820,7 +856,7 @@ static int cpcap_adc_init_request(struct cpcap_adc_request *req, > req->conv_tbl = bank_conversion; > > switch (channel) { > - case CPCAP_ADC_AD0_BATTDETB ... CPCAP_ADC_USB_ID: > + case CPCAP_ADC_AD0 ... CPCAP_ADC_USB_ID: > req->bank_index = channel; > break; > case CPCAP_ADC_AD8 ... CPCAP_ADC_TSY2_AD15: > @@ -860,6 +896,9 @@ static int cpcap_adc_read(struct iio_dev *indio_dev, > error = regmap_read(ddata->reg, chan->address, val); > if (error) > goto err_unlock; > + error = cpcap_adc_stop_bank(ddata); > + if (error) > + goto err_unlock; > mutex_unlock(&ddata->lock); > break; > case IIO_CHAN_INFO_PROCESSED: > @@ -870,6 +909,9 @@ static int cpcap_adc_read(struct iio_dev *indio_dev, > error = cpcap_adc_read_bank_scaled(ddata, &req); > if (error) > goto err_unlock; > + error = cpcap_adc_stop_bank(ddata); > + if (error) > + goto err_unlock; > mutex_unlock(&ddata->lock); > *val = req.result; > break;
next prev parent reply other threads:[~2017-05-24 19:18 UTC|newest] Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top 2017-05-23 0:51 [PATCHv2 0/3] Few non-critical cpcap ADC fixes Tony Lindgren 2017-05-23 0:51 ` Tony Lindgren [not found] ` <20170523005146.726-1-tony-4v6yS6AI5VpBDgjK7y7TUQ@public.gmane.org> 2017-05-23 0:51 ` [PATCH 1/3] iio: adc: cpcap: Fix default register values and battery temperature Tony Lindgren 2017-05-23 0:51 ` Tony Lindgren [not found] ` <20170523005146.726-2-tony-4v6yS6AI5VpBDgjK7y7TUQ@public.gmane.org> 2017-05-24 19:18 ` Jonathan Cameron [this message] 2017-05-24 19:18 ` Jonathan Cameron [not found] ` <20170524201831.3504c42d-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org> 2017-06-07 6:22 ` Tony Lindgren 2017-06-07 6:22 ` Tony Lindgren [not found] ` <20170607062200.GD3730-4v6yS6AI5VpBDgjK7y7TUQ@public.gmane.org> 2017-06-11 14:12 ` Jonathan Cameron 2017-06-11 14:12 ` Jonathan Cameron 2017-05-23 0:51 ` [PATCH 2/3] iio: adc: cpcap: Fix die temperature Tony Lindgren 2017-05-23 0:51 ` Tony Lindgren [not found] ` <20170523005146.726-3-tony-4v6yS6AI5VpBDgjK7y7TUQ@public.gmane.org> 2017-05-24 19:19 ` Jonathan Cameron 2017-05-24 19:19 ` Jonathan Cameron 2017-05-23 0:51 ` [PATCH 3/3] iio: adc: cpcap: Remove hung interrupt quirk Tony Lindgren 2017-05-23 0:51 ` Tony Lindgren [not found] ` <20170523005146.726-4-tony-4v6yS6AI5VpBDgjK7y7TUQ@public.gmane.org> 2017-05-24 19:24 ` Jonathan Cameron 2017-05-24 19:24 ` Jonathan Cameron -- strict thread matches above, loose matches on Subject: below -- 2017-05-19 3:40 [PATCH 0/3] Few non-critical cpcap ADC fixes Tony Lindgren [not found] ` <20170519034035.16795-1-tony-4v6yS6AI5VpBDgjK7y7TUQ@public.gmane.org> 2017-05-19 3:40 ` [PATCH 1/3] iio: adc: cpcap: Fix default register values and battery temperature Tony Lindgren 2017-05-19 3:40 ` Tony Lindgren [not found] ` <20170519034035.16795-2-tony-4v6yS6AI5VpBDgjK7y7TUQ@public.gmane.org> 2017-05-20 5:52 ` Matt Ranostay 2017-05-20 5:52 ` Matt Ranostay [not found] ` <CAJCx=gm7t=2nuHiLCXUohLXR62gZ-ux62tWyEQXyNXMrhTutKg-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org> 2017-05-20 15:51 ` Jonathan Cameron 2017-05-20 15:51 ` Jonathan Cameron 2017-05-20 16:02 ` Tony Lindgren 2017-05-20 16:02 ` Tony Lindgren
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