Re: [PATCH 3/4] extcon: arizona: Update manual headphone detection calculation
On Fri, May 30, 2014 at 10:27:35AM +0900, Chanwoo Choi wrote: > Hi Charles, > > On 05/30/2014 12:27 AM, Charles Keepax wrote: > > The higher levels of impedance have a higher minimum value than the > > first level. As the same value was used for all levels, higher impedances > > were reported with a very low level of accuracy. This patch applies the > > approriate lower threshold for each level. > > > > Signed-off-by: Charles Keepax > > --- > > drivers/extcon/extcon-arizona.c | 13 - > > 1 files changed, 8 insertions(+), 5 deletions(-) > > > > diff --git a/drivers/extcon/extcon-arizona.c > > b/drivers/extcon/extcon-arizona.c > > index f2c36b1..c1c8647 100644 > > --- a/drivers/extcon/extcon-arizona.c > > +++ b/drivers/extcon/extcon-arizona.c > > @@ -329,12 +329,13 @@ static void arizona_stop_mic(struct > > arizona_extcon_info *info) > > } > > > > static struct { > > + unsigned int threshold; > > unsigned int factor_a; > > unsigned int factor_b; > > } arizona_hpdet_b_ranges[] = { > > - { 5528, 362464 }, > > - { 11084, 6186851 }, > > - { 11065, 65460395 }, > > + { 100, 5528, 362464 }, > > + { 169, 11084, 6186851 }, > > + { 169, 11065, 65460395 }, > > If you possible, I want to know the 'unit' of the variable(factor_a, > factor_b). I am not sure there are really especially sensible units to give. > > > }; > > > > static struct { > > @@ -391,7 +392,8 @@ static int arizona_hpdet_read(struct > > arizona_extcon_info *info) > >>> ARIZONA_HP_IMPEDANCE_RANGE_SHIFT; > > > > if (range < ARRAY_SIZE(arizona_hpdet_b_ranges) - 1 && > > - (val < 100 || val >= 0x3fb)) { > > + (val < arizona_hpdet_b_ranges[range].threshold || > > +val >= 0x3fb)) { > > I don't understand the meaning of 0x3fb hex value. > I prefer to define constant variable for readability. Thats fine I can add a define as part of this patch. Thanks, Charles -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
Re: [PATCH 3/4] extcon: arizona: Update manual headphone detection calculation
Hi Charles, On 05/30/2014 12:27 AM, Charles Keepax wrote: > The higher levels of impedance have a higher minimum value than the > first level. As the same value was used for all levels, higher impedances > were reported with a very low level of accuracy. This patch applies the > approriate lower threshold for each level. > > Signed-off-by: Charles Keepax > --- > drivers/extcon/extcon-arizona.c | 13 - > 1 files changed, 8 insertions(+), 5 deletions(-) > > diff --git a/drivers/extcon/extcon-arizona.c b/drivers/extcon/extcon-arizona.c > index f2c36b1..c1c8647 100644 > --- a/drivers/extcon/extcon-arizona.c > +++ b/drivers/extcon/extcon-arizona.c > @@ -329,12 +329,13 @@ static void arizona_stop_mic(struct arizona_extcon_info > *info) > } > > static struct { > + unsigned int threshold; > unsigned int factor_a; > unsigned int factor_b; > } arizona_hpdet_b_ranges[] = { > - { 5528, 362464 }, > - { 11084, 6186851 }, > - { 11065, 65460395 }, > + { 100, 5528, 362464 }, > + { 169, 11084, 6186851 }, > + { 169, 11065, 65460395 }, If you possible, I want to know the 'unit' of the variable(factor_a, factor_b). > }; > > static struct { > @@ -391,7 +392,8 @@ static int arizona_hpdet_read(struct arizona_extcon_info > *info) > >> ARIZONA_HP_IMPEDANCE_RANGE_SHIFT; > > if (range < ARRAY_SIZE(arizona_hpdet_b_ranges) - 1 && > - (val < 100 || val >= 0x3fb)) { > + (val < arizona_hpdet_b_ranges[range].threshold || > + val >= 0x3fb)) { I don't understand the meaning of 0x3fb hex value. I prefer to define constant variable for readability. > range++; > dev_dbg(arizona->dev, "Moving to HPDET range %d\n", > range); > @@ -404,7 +406,8 @@ static int arizona_hpdet_read(struct arizona_extcon_info > *info) > } > > /* If we go out of range report top of range */ > - if (val < 100 || val >= 0x3fb) { > + if (val < arizona_hpdet_b_ranges[range].threshold || > + val >= 0x3fb) { ditto. > dev_dbg(arizona->dev, "Measurement out of range\n"); > return ARIZONA_HPDET_MAX; > } > Thanks, Chanwoo Choi -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
[PATCH 3/4] extcon: arizona: Update manual headphone detection calculation
The higher levels of impedance have a higher minimum value than the first level. As the same value was used for all levels, higher impedances were reported with a very low level of accuracy. This patch applies the approriate lower threshold for each level. Signed-off-by: Charles Keepax --- drivers/extcon/extcon-arizona.c | 13 - 1 files changed, 8 insertions(+), 5 deletions(-) diff --git a/drivers/extcon/extcon-arizona.c b/drivers/extcon/extcon-arizona.c index f2c36b1..c1c8647 100644 --- a/drivers/extcon/extcon-arizona.c +++ b/drivers/extcon/extcon-arizona.c @@ -329,12 +329,13 @@ static void arizona_stop_mic(struct arizona_extcon_info *info) } static struct { + unsigned int threshold; unsigned int factor_a; unsigned int factor_b; } arizona_hpdet_b_ranges[] = { - { 5528, 362464 }, - { 11084, 6186851 }, - { 11065, 65460395 }, + { 100, 5528, 362464 }, + { 169, 11084, 6186851 }, + { 169, 11065, 65460395 }, }; static struct { @@ -391,7 +392,8 @@ static int arizona_hpdet_read(struct arizona_extcon_info *info) >> ARIZONA_HP_IMPEDANCE_RANGE_SHIFT; if (range < ARRAY_SIZE(arizona_hpdet_b_ranges) - 1 && - (val < 100 || val >= 0x3fb)) { + (val < arizona_hpdet_b_ranges[range].threshold || +val >= 0x3fb)) { range++; dev_dbg(arizona->dev, "Moving to HPDET range %d\n", range); @@ -404,7 +406,8 @@ static int arizona_hpdet_read(struct arizona_extcon_info *info) } /* If we go out of range report top of range */ - if (val < 100 || val >= 0x3fb) { + if (val < arizona_hpdet_b_ranges[range].threshold || + val >= 0x3fb) { dev_dbg(arizona->dev, "Measurement out of range\n"); return ARIZONA_HPDET_MAX; } -- 1.7.2.5 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/