From: Vitaly Rodionov Date: Tue, 11 May 2021 14:52:20 +0000 (+0100) Subject: ASoC: cs42l42: make HSBIAS_SENSE_EN optional X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=c9f2e3c3ddab87d93cde99f6da10dd00c1d1edb9;p=linux.git ASoC: cs42l42: make HSBIAS_SENSE_EN optional HSBIAS_SENSE_EN configures HSBIAS output current sense through the external 2.21-k resistor. HSBIAS_SENSE is hardware feature to reduce the potential pop noise during the headset plug out slowly. But on some platforms ESD voltage will affect it causing test to fail, especially with CTIA headset type. For different hardware setups, a designer might want to tweak default behavior. Signed-off-by: Vitaly Rodionov Link: https://lore.kernel.org/r/20210511145220.125760-1-vitalyr@opensource.cirrus.com Signed-off-by: Mark Brown --- diff --git a/Documentation/devicetree/bindings/sound/cs42l42.txt b/Documentation/devicetree/bindings/sound/cs42l42.txt index 7dfaa2ab906fb..5d416fdaf0234 100644 --- a/Documentation/devicetree/bindings/sound/cs42l42.txt +++ b/Documentation/devicetree/bindings/sound/cs42l42.txt @@ -81,6 +81,13 @@ Optional properties: < x1 x2 x3 x4 > Default = < 15 8 4 1> + - cirrus,hs-bias-sense-disable: This is boolean property. If present the + HSBIAS sense is disabled. Configures HSBIAS output current sense through + the external 2.21-k resistor. HSBIAS_SENSE is hardware feature to reduce + the potential pop noise during the headset plug out slowly. But on some + platforms ESD voltage will affect it causing test to fail, especially + with CTIA headset type. For different hardware setups, a designer might + want to tweak default behavior. Example: diff --git a/sound/soc/codecs/cs42l42.c b/sound/soc/codecs/cs42l42.c index d7fb6b38fd7c3..5087c5b781f8c 100644 --- a/sound/soc/codecs/cs42l42.c +++ b/sound/soc/codecs/cs42l42.c @@ -1033,7 +1033,7 @@ static void cs42l42_process_hs_type_detect(struct cs42l42_private *cs42l42) CS42L42_AUTO_HSBIAS_HIZ_MASK | CS42L42_TIP_SENSE_EN_MASK | CS42L42_HSBIAS_SENSE_TRIP_MASK, - (1 << CS42L42_HSBIAS_SENSE_EN_SHIFT) | + (cs42l42->hs_bias_sense_en << CS42L42_HSBIAS_SENSE_EN_SHIFT) | (1 << CS42L42_AUTO_HSBIAS_HIZ_SHIFT) | (0 << CS42L42_TIP_SENSE_EN_SHIFT) | (3 << CS42L42_HSBIAS_SENSE_TRIP_SHIFT)); @@ -1808,6 +1808,11 @@ static int cs42l42_handle_device_data(struct device *dev, (cs42l42->hs_bias_ramp_rate << CS42L42_HSBIAS_RAMP_SHIFT)); + if (device_property_read_bool(dev, "cirrus,hs-bias-sense-disable")) + cs42l42->hs_bias_sense_en = 0; + else + cs42l42->hs_bias_sense_en = 1; + return 0; } diff --git a/sound/soc/codecs/cs42l42.h b/sound/soc/codecs/cs42l42.h index 2e0d3836bd7e4..24f7be228d5f9 100644 --- a/sound/soc/codecs/cs42l42.h +++ b/sound/soc/codecs/cs42l42.h @@ -787,6 +787,7 @@ struct cs42l42_private { u8 bias_thresholds[CS42L42_NUM_BIASES]; u8 hs_bias_ramp_rate; u8 hs_bias_ramp_time; + u8 hs_bias_sense_en; u8 stream_use; };