[PATCH v3 1/3] ASoC: tlv320adcx140: Add controls for PDM clk
Add ALSA controls to configure the PDM clocks. The clocks need to be configurable to accommodate various microphones that use clocks for low power/low resolution modes to high power/high resolution modes.
Signed-off-by: Dan Murphy dmurphy@ti.com --- sound/soc/codecs/tlv320adcx140.c | 19 +++++++++++++++++++ 1 file changed, 19 insertions(+)
diff --git a/sound/soc/codecs/tlv320adcx140.c b/sound/soc/codecs/tlv320adcx140.c index 0f713efde046..97634e0ca0ba 100644 --- a/sound/soc/codecs/tlv320adcx140.c +++ b/sound/soc/codecs/tlv320adcx140.c @@ -180,6 +180,17 @@ static const struct snd_kcontrol_new decimation_filter_controls[] = { SOC_DAPM_ENUM("Decimation Filter", decimation_filter_enum), };
+static const char * const pdmclk_text[] = { + "2.8224 MHz", "1.4112 MHz", "705.6 kHz", "5.6448 MHz" +}; + +static SOC_ENUM_SINGLE_DECL(pdmclk_select_enum, ADCX140_PDMCLK_CFG, 0, + pdmclk_text); + +static const struct snd_kcontrol_new pdmclk_div_controls[] = { + SOC_DAPM_ENUM("PDM Clk Divider Select", pdmclk_select_enum), +}; + static const char * const resistor_text[] = { "2.5 kOhm", "10 kOhm", "20 kOhm" }; @@ -416,6 +427,9 @@ static const struct snd_soc_dapm_widget adcx140_dapm_widgets[] = { SND_SOC_DAPM_MUX("IN4 Analog Mic Resistor", SND_SOC_NOPM, 0, 0, in4_resistor_controls),
+ SND_SOC_DAPM_MUX("PDM Clk Div Select", SND_SOC_NOPM, 0, 0, + pdmclk_div_controls), + SND_SOC_DAPM_MUX("Decimation Filter", SND_SOC_NOPM, 0, 0, decimation_filter_controls), }; @@ -493,6 +507,11 @@ static const struct snd_soc_dapm_route adcx140_audio_map[] = { {"IN4 Analog Mic Resistor", "10 kOhm", "MIC4M Input Mux"}, {"IN4 Analog Mic Resistor", "20 kOhm", "MIC4M Input Mux"},
+ {"PDM Clk Div Select", "2.8224 MHz", "MIC1P Input Mux"}, + {"PDM Clk Div Select", "1.4112 MHz", "MIC1P Input Mux"}, + {"PDM Clk Div Select", "705.6 kHz", "MIC1P Input Mux"}, + {"PDM Clk Div Select", "5.6448 MHz", "MIC1P Input Mux"}, + {"MIC1 Analog Mux", "Line In", "MIC1P"}, {"MIC2 Analog Mux", "Line In", "MIC2P"}, {"MIC3 Analog Mux", "Line In", "MIC3P"},
Add a device tree property to configure the PDM sampling edge for each digital microphone.
CC: Rob Herring robh@kernel.org Signed-off-by: Dan Murphy dmurphy@ti.com ---
v3 - Updated description to be more descriptive and fixed example.
.../bindings/sound/tlv320adcx140.yaml | 24 +++++++++++++++++++ 1 file changed, 24 insertions(+)
diff --git a/Documentation/devicetree/bindings/sound/tlv320adcx140.yaml b/Documentation/devicetree/bindings/sound/tlv320adcx140.yaml index ab2268c0ee67..daa6cc0e031b 100644 --- a/Documentation/devicetree/bindings/sound/tlv320adcx140.yaml +++ b/Documentation/devicetree/bindings/sound/tlv320adcx140.yaml @@ -63,6 +63,29 @@ properties: - $ref: /schemas/types.yaml#/definitions/uint32 - enum: [0, 1, 2]
+ ti,pdm-edge-select: + description: | + Defines the PDMCLK sampling edge configuration for the PDM inputs. This + array is defined as <PDMIN1 PDMIN2 PDMIN3 PDMIN4>. + + 0 - (default) Odd channel is latched on the negative edge and even + channel is latched on the the positive edge. + 1 - Odd channel is latched on the positive edge and even channel is + latched on the the negative edge. + + PDMIN1 - PDMCLK latching edge used for channel 1 and 2 data + PDMIN2 - PDMCLK latching edge used for channel 3 and 4 data + PDMIN3 - PDMCLK latching edge used for channel 5 and 6 data + PDMIN4 - PDMCLK latching edge used for channel 7 and 8 data + + allOf: + - $ref: /schemas/types.yaml#/definitions/uint32-array + - minItems: 1 + maxItems: 4 + items: + maximum: 1 + default: [0, 0, 0, 0] + required: - compatible - reg @@ -77,6 +100,7 @@ examples: compatible = "ti,tlv320adc5140"; reg = <0x4c>; ti,mic-bias-source = <6>; + ti,pdm-edge-select = <0 1 0 1>; reset-gpios = <&gpio0 14 GPIO_ACTIVE_HIGH>; }; };
Configure the PDM sampling edges based on the values from the firmware.
Signed-off-by: Dan Murphy dmurphy@ti.com --- sound/soc/codecs/tlv320adcx140.c | 22 ++++++++++++++++++++++ sound/soc/codecs/tlv320adcx140.h | 3 +++ 2 files changed, 25 insertions(+)
diff --git a/sound/soc/codecs/tlv320adcx140.c b/sound/soc/codecs/tlv320adcx140.c index 97634e0ca0ba..140a5802a9a9 100644 --- a/sound/soc/codecs/tlv320adcx140.c +++ b/sound/soc/codecs/tlv320adcx140.c @@ -760,6 +760,10 @@ static int adcx140_codec_probe(struct snd_soc_component *component) int sleep_cfg_val = ADCX140_WAKE_DEV; u8 bias_source; u8 vref_source; + int pdm_count; + u32 pdm_edges[ADCX140_NUM_PDM_EDGES]; + u32 pdm_edge_val = 0; + int i; int ret;
ret = device_property_read_u8(adcx140->dev, "ti,mic-bias-source", @@ -786,6 +790,24 @@ static int adcx140_codec_probe(struct snd_soc_component *component)
bias_source |= vref_source;
+ pdm_count = device_property_count_u32(adcx140->dev, + "ti,pdm-edge-select"); + if (pdm_count <= ADCX140_NUM_PDM_EDGES && pdm_count > 0) { + ret = device_property_read_u32_array(adcx140->dev, + "ti,pdm-edge-select", + pdm_edges, pdm_count); + if (ret) + return ret; + + for (i = 0; i < pdm_count; i++) + pdm_edge_val |= pdm_edges[i] << (ADCX140_PDM_EDGE_SHIFT - i); + + ret = regmap_write(adcx140->regmap, ADCX140_PDM_CFG, + pdm_edge_val); + if (ret) + return ret; + } + ret = adcx140_reset(adcx140); if (ret) goto out; diff --git a/sound/soc/codecs/tlv320adcx140.h b/sound/soc/codecs/tlv320adcx140.h index 6d055e55909e..432eaf25d1a7 100644 --- a/sound/soc/codecs/tlv320adcx140.h +++ b/sound/soc/codecs/tlv320adcx140.h @@ -128,4 +128,7 @@
#define ADCX140_TX_OFFSET_MASK GENMASK(4, 0)
+#define ADCX140_NUM_PDM_EDGES 4 +#define ADCX140_PDM_EDGE_SHIFT 7 + #endif /* _TLV320ADCX140_ */
On Thu, 14 May 2020 07:33:36 -0500, Dan Murphy wrote:
Add ALSA controls to configure the PDM clocks. The clocks need to be configurable to accommodate various microphones that use clocks for low power/low resolution modes to high power/high resolution modes.
Applied to
https://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound.git for-5.8
Thanks!
[1/3] ASoC: tlv320adcx140: Add controls for PDM clk commit: 7cfa610205d95357f9eface292dc70fce7571f65 [2/3] ASoC: tlv320adcx140: Add device tree property for PDM edges commit: 75b0adbb0806a141b0b5f074cd6bd58bb9870c0d [3/3] ASoC: tlv320adcx140: Configure PDM sampling edge commit: 79fc48e41e39d7a98c5f8ae37f613d7ff9953c86
All being well this means that it will be integrated into the linux-next tree (usually sometime in the next 24 hours) and sent to Linus during the next merge window (or sooner if it is a bug fix), however if problems are discovered then the patch may be dropped or reverted.
You may get further e-mails resulting from automated or manual testing and review of the tree, please engage with people reporting problems and send followup patches addressing any issues that are reported if needed.
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Thanks, Mark
participants (2)
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Dan Murphy -
Mark Brown