[PATCH v2 0/2] ASoC: Add Richtek RTQ9124 support

[PATCH v2 0/2] ASoC: Add Richtek RTQ9124 support

[cy_huang]

From: ChiYuan Huang <cy_huang@richtek.com>

This patch series adds Richtek RTQ9124 1x30W audio amplifier support.

v2:
- Instead to add a dedicated rtq9124 document file, append the
  description to the existed rt9123 yaml

ChiYuan Huang (2):
  ASoC: dt-bindings: rt9123: Append RTQ9124 description
  ASoC: codecs: Add support for Richtek RTQ9124

 .../bindings/sound/richtek,rt9123.yaml        |   9 +-
 sound/soc/codecs/Kconfig                      |   9 +
 sound/soc/codecs/Makefile                     |   4 +-
 sound/soc/codecs/rtq9124.c                    | 543 ++++++++++++++++++
 4 files changed, 563 insertions(+), 2 deletions(-)
 create mode 100644 sound/soc/codecs/rtq9124.c

-- 
2.34.1

[PATCH v2 1/2] ASoC: dt-bindings: rt9123: Append RTQ9124 description

[cy_huang]

From: ChiYuan Huang <cy_huang@richtek.com>

Document the ASoC Richtek RTQ9124 in existed RT9123 file.

Signed-off-by: ChiYuan Huang <cy_huang@richtek.com>
---
v2:
- Due to the similar document file, directly append RTQ9124 into RT9123
  document to prevent adding the redudant yaml file
---
 .../devicetree/bindings/sound/richtek,rt9123.yaml        | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/Documentation/devicetree/bindings/sound/richtek,rt9123.yaml b/Documentation/devicetree/bindings/sound/richtek,rt9123.yaml
index 5acb05cdfefd..819ca06203b1 100644
--- a/Documentation/devicetree/bindings/sound/richtek,rt9123.yaml
+++ b/Documentation/devicetree/bindings/sound/richtek,rt9123.yaml
@@ -4,7 +4,7 @@
 $id: http://devicetree.org/schemas/sound/richtek,rt9123.yaml#
 $schema: http://devicetree.org/meta-schemas/core.yaml#
 
-title: Richtek RT9123 Audio Amplifier
+title: Richtek RT9123/RTQ9124 Audio Amplifier
 
 maintainers:
   - ChiYuan Huang <cy_huang@richtek.com>
@@ -15,6 +15,12 @@ description:
   support various formats, including I2S, left-justified, right-justified, and
   TDM formats.
 
+  RTQ9124 is an ultra-low output noise, digital input, mono-channel Class-D
+  power amplifier that supports a 2.1MHz switching frequency. It integrates
+  both DC and AC load diagnostics, as well as real-time load monitoring to
+  assess speaker condition. The device operates from 4.5V to 18V and delivers
+  up to 30W output power.
+
 allOf:
   - $ref: dai-common.yaml#
 
@@ -22,6 +28,7 @@ properties:
   compatible:
     enum:
       - richtek,rt9123
+      - richtek,rtq9124
 
   reg:
     maxItems: 1
-- 
2.34.1

[PATCH v2 2/2] ASoC: codecs: Add support for Richtek RTQ9124

[cy_huang]

From: ChiYuan Huang <cy_huang@richtek.com>

Add codecs driver for Richtek RTQ9124.

Signed-off-by: ChiYuan Huang <cy_huang@richtek.com>
---
 sound/soc/codecs/Kconfig   |   9 +
 sound/soc/codecs/Makefile  |   4 +-
 sound/soc/codecs/rtq9124.c | 543 +++++++++++++++++++++++++++++++++++++
 3 files changed, 555 insertions(+), 1 deletion(-)
 create mode 100644 sound/soc/codecs/rtq9124.c

diff --git a/sound/soc/codecs/Kconfig b/sound/soc/codecs/Kconfig
index 126f897312d4..d0c01f49a8ba 100644
--- a/sound/soc/codecs/Kconfig
+++ b/sound/soc/codecs/Kconfig
@@ -238,6 +238,7 @@ config SND_SOC_ALL_CODECS
 	imply SND_SOC_RT1320_SDW
 	imply SND_SOC_RT9120
 	imply SND_SOC_RT9123
+	imply SND_SOC_RTQ9124
 	imply SND_SOC_RTQ9128
 	imply SND_SOC_SDW_MOCKUP
 	imply SND_SOC_SGTL5000
@@ -1858,6 +1859,14 @@ config SND_SOC_RT9123P
 	  Enable support for the HW control mode of Richtek RT9123P 3.2W mono
 	  Class-D audio amplifier.
 
+config SND_SOC_RTQ9124
+	tristate "Richtek RTQ9124 Mono Class-D Amplifier"
+	depends on I2C
+	select REGMAP
+	help
+	  Enable support for Richtek RTQ9124 1x30W digital input automotive
+	  audio amplifier with current sense and real-time load diagnostics.
+
 config SND_SOC_RTQ9128
 	tristate "Richtek RTQ9128 45W Digital Input Amplifier"
 	depends on I2C
diff --git a/sound/soc/codecs/Makefile b/sound/soc/codecs/Makefile
index 6d7aa109ede7..a68c3d192a1b 100644
--- a/sound/soc/codecs/Makefile
+++ b/sound/soc/codecs/Makefile
@@ -275,6 +275,7 @@ snd-soc-rt722-sdca-y := rt722-sdca.o rt722-sdca-sdw.o
 snd-soc-rt9120-y := rt9120.o
 snd-soc-rt9123-y := rt9123.o
 snd-soc-rt9123p-y := rt9123p.o
+snd-soc-rtq9124-y := rtq9124.o
 snd-soc-rtq9128-y := rtq9128.o
 snd-soc-sdw-mockup-y := sdw-mockup.o
 snd-soc-sgtl5000-y := sgtl5000.o
@@ -695,6 +696,7 @@ obj-$(CONFIG_SND_SOC_RT722_SDCA_SDW)     += snd-soc-rt722-sdca.o
 obj-$(CONFIG_SND_SOC_RT9120)	+= snd-soc-rt9120.o
 obj-$(CONFIG_SND_SOC_RT9123)	+= snd-soc-rt9123.o
 obj-$(CONFIG_SND_SOC_RT9123P)	+= snd-soc-rt9123p.o
+obj-$(CONFIG_SND_SOC_RTQ9124)	+= snd-soc-rtq9124.o
 obj-$(CONFIG_SND_SOC_RTQ9128)	+= snd-soc-rtq9128.o
 obj-$(CONFIG_SND_SOC_SDW_MOCKUP)     += snd-soc-sdw-mockup.o
 obj-$(CONFIG_SND_SOC_SGTL5000)  += snd-soc-sgtl5000.o
@@ -853,4 +855,4 @@ obj-$(CONFIG_SND_SOC_LPASS_RX_MACRO)	+= snd-soc-lpass-rx-macro.o
 obj-$(CONFIG_SND_SOC_LPASS_TX_MACRO)	+= snd-soc-lpass-tx-macro.o
 
 # Mux
-obj-$(CONFIG_SND_SOC_SIMPLE_MUX)	+= snd-soc-simple-mux.o
\ No newline at end of file
+obj-$(CONFIG_SND_SOC_SIMPLE_MUX)	+= snd-soc-simple-mux.o
diff --git a/sound/soc/codecs/rtq9124.c b/sound/soc/codecs/rtq9124.c
new file mode 100644
index 000000000000..186904b31434
--- /dev/null
+++ b/sound/soc/codecs/rtq9124.c
@@ -0,0 +1,543 @@
+// SPDX-License-Identifier: GPL-2.0-only
+//
+// rtq9124.c -- RTQ9124 ALSA SoC Codec driver
+//
+// Author: ChiYuan Huang <cy_huang@richtek.com>
+
+#include <linux/bitfield.h>
+#include <linux/bits.h>
+#include <linux/byteorder/generic.h>
+#include <linux/delay.h>
+#include <linux/err.h>
+#include <linux/gpio/consumer.h>
+#include <linux/i2c.h>
+#include <linux/kernel.h>
+#include <linux/mod_devicetable.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/pm_runtime.h>
+#include <linux/property.h>
+#include <linux/regmap.h>
+#include <sound/pcm.h>
+#include <sound/pcm_params.h>
+#include <sound/soc.h>
+#include <sound/soc-dai.h>
+#include <sound/soc-dapm.h>
+#include <sound/tlv.h>
+
+#define RTQ9124_REG_SDI_SEL		0x00
+#define RTQ9124_REG_SDO_SEL		0x01
+#define RTQ9124_REG_I2S_OPT		0x02
+#define RTQ9124_REG_AMP_OPT		0x03
+#define RTQ9124_REG_STATE_CTRL		0x04
+#define RTQ9124_REG_PWM_PHASE		0x05
+#define RTQ9124_REG_SIL_CTRL		0x06
+#define RTQ9124_REG_PWM_SS_OPT		0x07
+#define RTQ9124_REG_ERR_INT_0		0x10
+#define RTQ9124_REG_ERR_MASK6		0x26
+#define RTQ9124_REG_TDM_TX_CH0		0x32
+#define RTQ9124_REG_TDM_RX_CH0		0x34
+#define RTQ9124_REG_VOL_OPT		0x38
+#define RTQ9124_REG_DCR_TH		0x4B
+#define RTQ9124_REG_ERR_TH		0x4C
+#define RTQ9124_REG_PROT_EN		0x5B
+#define RTQ9124_REG_PRJ_CODE		0xF9
+
+#define RTQ9124_MASK_CS_DATA_INV	BIT(9)
+#define RTQ9124_MASK_VDDIO_SDO_SEL	BIT(8)
+#define RTQ9124_MASK_AUD_BITS		GENMASK(5, 4)
+#define RTQ9124_MASK_AUD_FMT		GENMASK(3, 0)
+#define RTQ9124_MASK_CH_STATE		GENMASK(1, 0)
+#define RTQ9124_MASK_SF_RESET		BIT(15)
+
+#define RTQ9124_FIXED_VENID		0x9124
+
+struct rtq9124_priv {
+	struct gpio_desc *enable;
+	unsigned int dai_fmt;
+	int tdm_slots;
+	int tdm_slot_width;
+};
+
+static int rtq9124_enable_event(struct snd_soc_dapm_widget *w, struct snd_kcontrol *kcontrol,
+				int event)
+{
+	struct snd_soc_component *comp = snd_soc_dapm_to_component(w->dapm);
+	unsigned int i, chan_state;
+
+	switch (event) {
+	case SND_SOC_DAPM_POST_PMU:
+		/* Change state to normal */
+		chan_state = 0;
+		break;
+	case SND_SOC_DAPM_POST_PMD:
+		/* Change state to HiZ */
+		chan_state = 1;
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	/* Before amp turn on, clear old events first */
+	for (i = 0; !chan_state && i < 8; i++)
+		snd_soc_component_write(comp, RTQ9124_REG_ERR_INT_0 + i, 0xffff);
+
+	snd_soc_component_write_field(comp, RTQ9124_REG_STATE_CTRL, RTQ9124_MASK_CH_STATE,
+				      chan_state);
+
+	return 0;
+}
+
+static const struct snd_soc_dapm_widget rtq9124_dapm_widgets[] = {
+	SND_SOC_DAPM_OUTPUT("SPK"),
+	SND_SOC_DAPM_OUT_DRV_E("Amp Drv", SND_SOC_NOPM, 0, 0, NULL, 0, rtq9124_enable_event,
+			       SND_SOC_DAPM_POST_PMU | SND_SOC_DAPM_POST_PMD),
+};
+
+static const struct snd_soc_dapm_route rtq9124_dapm_routes[] = {
+	{ "Amp Drv", NULL, "HiFi Playback" },
+	{ "SPK", NULL, "Amp Drv" },
+};
+
+static const DECLARE_TLV_DB_SCALE(dig_tlv, -10375, 25, 0);
+static const DECLARE_TLV_DB_RANGE(ana_tlv,
+				  0, 3, TLV_DB_SCALE_ITEM(-600, 600, 0),
+				  4, 6, TLV_DB_SCALE_ITEM(1400, 200, 0));
+static const char * const i2sch_text[] = { "(L+R)/2", "LCH", "RCH", "(L+R)/2" };
+static const struct soc_enum rtq9124_i2sch_select_enum =
+	SOC_ENUM_SINGLE(RTQ9124_REG_SDI_SEL, 0, ARRAY_SIZE(i2sch_text), i2sch_text);
+static const char * const sdo_vsel_text[] = { "1.8V", "3.3V" };
+static const struct soc_enum rtq9124_sdo_vselect_enum =
+	SOC_ENUM_SINGLE(RTQ9124_REG_SDO_SEL, 8, ARRAY_SIZE(sdo_vsel_text), sdo_vsel_text);
+static const char * const pwmfreq_text[] = { "8*fs", "10*fs", "40*fs", "44*fs", "48*fs" };
+static const struct soc_enum rtq9124_pwm_freq_enum =
+	SOC_ENUM_SINGLE(RTQ9124_REG_AMP_OPT, 4, ARRAY_SIZE(pwmfreq_text), pwmfreq_text);
+static const char * const out_angle_text[] = { "0", "45", "90", "135", "180", "225", "270", "315" };
+static const struct soc_enum rtq9124_out_angle_enum =
+	SOC_ENUM_SINGLE(RTQ9124_REG_PWM_PHASE, 0, ARRAY_SIZE(out_angle_text), out_angle_text);
+static const char * const sdo_select_text[] = {
+	"None", "I2S DataI", "Interface", "DSP", "DF", "ISense", "ACLoad Cos", "ACLoad Sin",
+	"DCR",
+};
+static const struct soc_enum rtq9124_sdo_select_enum =
+	SOC_ENUM_DOUBLE(RTQ9124_REG_SDO_SEL, 4, 0, ARRAY_SIZE(sdo_select_text), sdo_select_text);
+static const char * const ulqm_dcvt_text[] = { "Disable", "DC", "VT", "DC+VT" };
+static const struct soc_enum rtq9124_ulqm_dcvt_select_enum =
+	SOC_ENUM_SINGLE(RTQ9124_REG_STATE_CTRL, 10, ARRAY_SIZE(ulqm_dcvt_text), ulqm_dcvt_text);
+
+static const struct snd_kcontrol_new rtq9124_controls[] = {
+	SOC_SINGLE_TLV("Master Volume", RTQ9124_REG_VOL_OPT, 2, 511, 1, dig_tlv),
+	SOC_SINGLE_TLV("Speaker Volume", RTQ9124_REG_AMP_OPT, 0, 6, 0, ana_tlv),
+	SOC_ENUM("I2S CH Select", rtq9124_i2sch_select_enum),
+	SOC_ENUM("SDO VDDIO Select", rtq9124_sdo_vselect_enum),
+	SOC_ENUM("PWM Frequency Select", rtq9124_pwm_freq_enum),
+	SOC_ENUM("PWM Output Phase Select", rtq9124_out_angle_enum),
+	SOC_ENUM("SDO Select", rtq9124_sdo_select_enum),
+	SOC_ENUM("ULQM DCVT Select", rtq9124_ulqm_dcvt_select_enum),
+	SOC_SINGLE("Silence Detect Enable Switch", RTQ9124_REG_SIL_CTRL, 7, 1, 0),
+	SOC_SINGLE("Spread Spectrum Enable Switch", RTQ9124_REG_PWM_SS_OPT, 7, 1, 0),
+};
+
+static int rtq9124_comp_probe(struct snd_soc_component *comp)
+{
+	/* CS Data INV */
+	snd_soc_component_write_field(comp, RTQ9124_REG_SDO_SEL, RTQ9124_MASK_CS_DATA_INV, 1);
+
+	/* RTLD */
+	snd_soc_component_write(comp, RTQ9124_REG_DCR_TH, 0x5e30);
+	snd_soc_component_write(comp, RTQ9124_REG_ERR_TH, 0x3ff);
+	snd_soc_component_write(comp, RTQ9124_REG_PROT_EN, 0x3fc);
+	snd_soc_component_write(comp, RTQ9124_REG_ERR_MASK6, 0);
+
+	return 0;
+}
+
+static const struct snd_soc_component_driver rtq9124_comp_driver = {
+	.probe			= rtq9124_comp_probe,
+	.controls		= rtq9124_controls,
+	.num_controls		= ARRAY_SIZE(rtq9124_controls),
+	.dapm_widgets		= rtq9124_dapm_widgets,
+	.num_dapm_widgets	= ARRAY_SIZE(rtq9124_dapm_widgets),
+	.dapm_routes		= rtq9124_dapm_routes,
+	.num_dapm_routes	= ARRAY_SIZE(rtq9124_dapm_routes),
+	.use_pmdown_time	= 1,
+	.endianness		= 1,
+};
+
+static int rtq9124_dai_set_format(struct snd_soc_dai *dai, unsigned int fmt)
+{
+	struct rtq9124_priv *rtq9124 = snd_soc_dai_get_drvdata(dai);
+
+	rtq9124->dai_fmt = fmt;
+	return 0;
+}
+
+static int rtq9124_dai_set_tdm_slot(struct snd_soc_dai *dai, unsigned int tx_mask,
+				    unsigned int rx_mask, int slots, int slot_width)
+{
+	struct rtq9124_priv *rtq9124 = snd_soc_dai_get_drvdata(dai);
+	struct snd_soc_component *comp = dai->component;
+	struct device *dev = dai->dev;
+	unsigned int byte_loc, i;
+
+	dev_dbg(dev, "(slots, slot_width) = (%d, %d), (txmask, rxmask) = 0x%x, 0x%x\n", slots,
+		slot_width, tx_mask, rx_mask);
+
+	if (slots <= 0 || slots > 16 || slot_width <= 0 || slots % 2 || slot_width % 8) {
+		dev_err(dev, "Invalid slot parameter (%d, %d)\n", slots, slot_width);
+		return -EINVAL;
+	}
+
+	if (tx_mask && (hweight_long(tx_mask) > 2 || fls(tx_mask) > slots)) {
+		dev_err(dev, "Invalid tx_mask 0x%08x, slots = %d\n", tx_mask, slots);
+		return -EINVAL;
+	}
+
+	if (!rx_mask || hweight_long(rx_mask) > 1 || fls(rx_mask) > slots) {
+		dev_err(dev, "Invalid rx_mask 0x%08x, slots = %d\n", rx_mask, slots);
+		return -EINVAL;
+	}
+
+	/* Configure tx channel data location */
+	for (i = 0; tx_mask; i++, tx_mask ^= BIT(ffs(tx_mask) - 1)) {
+		byte_loc = (ffs(tx_mask) - 1) * slot_width / 8;
+		snd_soc_component_write(comp, RTQ9124_REG_TDM_TX_CH0 + i, byte_loc);
+	}
+
+	/* Configure rx channel data location */
+	byte_loc = (ffs(rx_mask) - 1) * slot_width / 8;
+	snd_soc_component_write(comp, RTQ9124_REG_TDM_RX_CH0, byte_loc);
+
+	rtq9124->tdm_slots = slots;
+	rtq9124->tdm_slot_width = slot_width;
+
+	return 0;
+}
+
+static int rtq9124_dai_hw_params(struct snd_pcm_substream *substream,
+				 struct snd_pcm_hw_params *param, struct snd_soc_dai *dai)
+{
+	struct rtq9124_priv *rtq9124 = snd_soc_dai_get_drvdata(dai);
+	struct snd_soc_component *comp = dai->component;
+	unsigned int fmtval, width, slot_width, bitrate;
+	struct device *dev = dai->dev;
+	unsigned int audfmt, audbit;
+
+	fmtval = FIELD_GET(SND_SOC_DAIFMT_FORMAT_MASK, rtq9124->dai_fmt);
+	if (rtq9124->tdm_slots && fmtval != SND_SOC_DAIFMT_DSP_A &&
+	    fmtval != SND_SOC_DAIFMT_DSP_B) {
+		dev_err(dev, "TDM only can support DSP_A or DSP_B format\n");
+		return -EINVAL;
+	}
+
+	switch (fmtval) {
+	case SND_SOC_DAIFMT_I2S:
+		audfmt = 0;
+		break;
+	case SND_SOC_DAIFMT_LEFT_J:
+		audfmt = 1;
+		break;
+	case SND_SOC_DAIFMT_RIGHT_J:
+		audfmt = 2;
+		break;
+	case SND_SOC_DAIFMT_DSP_B:
+		audfmt = rtq9124->tdm_slots ? 7 : 3;
+		break;
+	case SND_SOC_DAIFMT_DSP_A:
+		audfmt = rtq9124->tdm_slots ? 15 : 11;
+		break;
+	default:
+		dev_err(dev, "Unsupported format %d\n", fmtval);
+		return -EINVAL;
+	}
+
+	switch (width = params_width(param)) {
+	case 16:
+		audbit = 0;
+		break;
+	case 20:
+		audbit = 1;
+		break;
+	case 24:
+	case 32:
+		audbit = 3;
+		break;
+	default:
+		dev_err(dev, "Unsupported width %d\n", width);
+		return -EINVAL;
+	}
+
+	if (rtq9124->tdm_slots) {
+		slot_width = params_physical_width(param);
+		if (slot_width > rtq9124->tdm_slot_width) {
+			dev_err(dev, "Slot width is larger than TDM slot width\n");
+			return -EINVAL;
+		}
+
+		bitrate = rtq9124->tdm_slots * rtq9124->tdm_slot_width * params_rate(param);
+		if (bitrate > 24576000) {
+			dev_err(dev, "Bitrate exceed the internal PLL 24.576MHz (%d)\n", bitrate);
+			return -EINVAL;
+		}
+	}
+
+	snd_soc_component_write_field(comp, RTQ9124_REG_I2S_OPT, RTQ9124_MASK_AUD_FMT, audfmt);
+	snd_soc_component_write_field(comp, RTQ9124_REG_I2S_OPT, RTQ9124_MASK_AUD_BITS, audbit);
+
+	return 0;
+}
+
+static const struct snd_soc_dai_ops rtq9124_dai_ops = {
+	.set_fmt	= rtq9124_dai_set_format,
+	.set_tdm_slot	= rtq9124_dai_set_tdm_slot,
+	.hw_params	= rtq9124_dai_hw_params,
+};
+
+static struct snd_soc_dai_driver rtq9124_dai_driver = {
+	.name = "HiFi",
+	.playback = {
+		.stream_name	= "HiFi Playback",
+		.formats	= SNDRV_PCM_FMTBIT_S16 | SNDRV_PCM_FMTBIT_S24 |
+				  SNDRV_PCM_FMTBIT_S32,
+		.rates		= SNDRV_PCM_RATE_8000_48000 | SNDRV_PCM_RATE_24000 |
+				  SNDRV_PCM_RATE_88200 | SNDRV_PCM_RATE_96000 |
+				  SNDRV_PCM_RATE_192000,
+		.rate_min	= 8000,
+		.rate_max	= 192000,
+		.channels_min	= 1,
+		.channels_max	= 2,
+	},
+	.ops = &rtq9124_dai_ops,
+	.symmetric_rate = 1,
+	.symmetric_sample_bits = 1,
+};
+
+static bool rtq9124_readable_reg(struct device *dev, unsigned int reg)
+{
+	switch (reg) {
+	case 0x00 ... 0x17:
+	case 0x20 ... 0x27:
+	case 0x30 ... 0x3D:
+	case 0x40 ... 0x68:
+	case 0x80 ... 0xBC:
+	case 0xC0 ... 0xDE:
+	case 0xE0 ... 0xE7:
+	case 0xF0 ... 0xFD:
+		return true;
+	default:
+		return false;
+	}
+}
+
+static bool rtq9124_writeable_reg(struct device *dev, unsigned int reg)
+{
+	switch (reg) {
+	case 0x00 ... 0x09:
+	case 0x0C ... 0x0E:
+	case 0x10 ... 0x17:
+	case 0x20 ... 0x27:
+	case 0x30:
+	case 0x32 ... 0x3D:
+	case 0x40 ... 0x4E:
+	case 0x50 ... 0x68:
+	case 0x80 ... 0xBC:
+	case 0xC0 ... 0xDE:
+	case 0xE0 ... 0xE7:
+	case 0xF0 ... 0xFD:
+		return true;
+	default:
+		return false;
+	}
+}
+
+static bool rtq9124_volatile_reg(struct device *dev, unsigned int reg)
+{
+	switch (reg) {
+	case 0x0A ... 0x0B:
+	case 0x0F ... 0x17:
+	case 0x31:
+	case 0x4F:
+	case 0x51:
+	case 0x53 ... 0x57:
+	case 0x80 ... 0xBC:
+	case 0xC0 ... 0xDE:
+	case 0xE0 ... 0xE7:
+	case 0xF0 ... 0xFD:
+		return true;
+	default:
+		return false;
+	}
+}
+
+static inline u8 rtq9124_get_reg_len(unsigned int reg)
+{
+	return (reg >= 0x40 && reg <= 0x47) ? 4 : 2;
+}
+
+static int rtq9124_regmap_read(void *context, const void *reg_buf, size_t reg_size, void *val_buf,
+			       size_t val_size)
+{
+	struct i2c_client *i2c = context;
+	u8 reg = *(u8 *)reg_buf;
+	u8 size = rtq9124_get_reg_len(reg);
+	u32 *val = val_buf;
+	int ret;
+
+	ret = i2c_smbus_read_i2c_block_data(i2c, reg, size, val_buf);
+	if (ret < 0)
+		return ret;
+	else if (ret != size)
+		return -EIO;
+
+	*val = size == 4 ? be32_to_cpup(val_buf) : be16_to_cpup(val_buf);
+
+	return 0;
+}
+
+static int rtq9124_regmap_write(void *context, const void *data, size_t count)
+{
+	struct i2c_client *i2c = context;
+	u8 reg = *(u8 *)data, *vbuf;
+	u8 size = rtq9124_get_reg_len(reg);
+	__be16 val16 = cpu_to_be16p(data + 1);
+	__be32 val32 = cpu_to_be32p(data + 1);
+
+	vbuf = size == 4 ? (u8 *)&val32 : (u8 *)&val16;
+	return i2c_smbus_write_i2c_block_data(i2c, reg, size, vbuf);
+}
+
+static const struct regmap_config rtq9124_regmap_config = {
+	.name			= "rtq9124",
+	.reg_bits		= 8,
+	.val_bits		= 32,
+	.read			= rtq9124_regmap_read,
+	.write			= rtq9124_regmap_write,
+	.readable_reg		= rtq9124_readable_reg,
+	.writeable_reg		= rtq9124_writeable_reg,
+	.volatile_reg		= rtq9124_volatile_reg,
+	.cache_type		= REGCACHE_MAPLE,
+	.num_reg_defaults_raw	= 0xFD + 1,
+	.use_single_read	= 1,
+	.use_single_write	= 1,
+};
+
+static const struct reg_sequence rtq9124_init_regs[] = {
+	{ 0xfb, 0x0065 },
+	{ 0x93, 0x2000 },
+	{ 0xfb, 0x0000 },
+};
+
+static int rtq9124_probe(struct i2c_client *i2c)
+{
+	struct device *dev = &i2c->dev;
+	struct rtq9124_priv *rtq9124;
+	struct regmap *regmap;
+	int ret;
+
+	rtq9124 = devm_kzalloc(dev, sizeof(*rtq9124), GFP_KERNEL);
+	if (!rtq9124)
+		return -ENOMEM;
+
+	rtq9124->enable = devm_gpiod_get_optional(dev, "enable", GPIOD_OUT_HIGH);
+	if (IS_ERR(rtq9124->enable))
+		return PTR_ERR(rtq9124->enable);
+	else if (rtq9124->enable)
+		usleep_range(6000, 7000);
+	else
+		dev_dbg(dev, "No 'enable' GPIO specified, treat it as default on\n");
+
+	/* Check vendor id information */
+	ret = i2c_smbus_read_word_swapped(i2c, RTQ9124_REG_PRJ_CODE);
+	if (ret < 0)
+		return dev_err_probe(dev, ret, "Failed to read project code\n");
+	else if (ret != RTQ9124_FIXED_VENID)
+		return dev_err_probe(dev, -ENODEV, "Incorrect project-code 0x%04x\n", ret);
+
+	/* Trigger RG reset before regmap init */
+	ret = i2c_smbus_write_word_swapped(i2c, RTQ9124_REG_STATE_CTRL, RTQ9124_MASK_SF_RESET);
+	if (ret)
+		return dev_err_probe(dev, ret, "Failed to trigger RG reset\n");
+
+	/* Need to wait 10ms for the reset to complete */
+	usleep_range(10000, 11000);
+
+	regmap = devm_regmap_init(dev, NULL, i2c, &rtq9124_regmap_config);
+	if (IS_ERR(regmap))
+		return dev_err_probe(dev, PTR_ERR(regmap), "Failed to init regmap\n");
+
+	ret = regmap_register_patch(regmap, rtq9124_init_regs, ARRAY_SIZE(rtq9124_init_regs));
+	if (ret)
+		return dev_err_probe(dev, ret, "Failed to register regmap patch\n");
+
+	i2c_set_clientdata(i2c, rtq9124);
+
+	pm_runtime_set_autosuspend_delay(dev, 1000);
+	pm_runtime_use_autosuspend(dev);
+	pm_runtime_set_active(dev);
+	ret = devm_pm_runtime_enable(dev);
+	if (ret)
+		return dev_err_probe(dev, ret, "Failed to enable pm runtime\n");
+
+	return devm_snd_soc_register_component(dev, &rtq9124_comp_driver, &rtq9124_dai_driver, 1);
+}
+
+#ifdef CONFIG_PM
+static int rtq9124_runtime_suspend(struct device *dev)
+{
+	struct rtq9124_priv *rtq9124 = dev_get_drvdata(dev);
+	struct regmap *regmap = dev_get_regmap(dev, NULL);
+
+	if (rtq9124->enable) {
+		regcache_cache_only(regmap, true);
+		regcache_mark_dirty(regmap);
+		gpiod_set_value(rtq9124->enable, 0);
+	}
+
+	return 0;
+}
+
+static int rtq9124_runtime_resume(struct device *dev)
+{
+	struct rtq9124_priv *rtq9124 = dev_get_drvdata(dev);
+	struct regmap *regmap = dev_get_regmap(dev, NULL);
+	int ret;
+
+	if (rtq9124->enable) {
+		gpiod_set_value(rtq9124->enable, 1);
+		usleep_range(6000, 7000);
+
+		regcache_cache_only(regmap, false);
+		ret = regcache_sync(regmap);
+		if (ret)
+			return ret;
+	}
+
+	return 0;
+}
+#endif
+
+static const struct dev_pm_ops rtq9124_dev_pm_ops = {
+	SET_RUNTIME_PM_OPS(rtq9124_runtime_suspend, rtq9124_runtime_resume, NULL)
+};
+
+#ifdef CONFIG_OF
+static const struct of_device_id rtq9124_device_id[] = {
+	{ .compatible = "richtek,rtq9124" },
+	{}
+};
+MODULE_DEVICE_TABLE(of, rtq9124_device_id);
+#endif
+
+static struct i2c_driver rtq9124_driver = {
+	.driver = {
+		.name = "rtq9124",
+		.of_match_table = of_match_ptr(rtq9124_device_id),
+		.pm = pm_ptr(&rtq9124_dev_pm_ops),
+	},
+	.probe	= rtq9124_probe,
+};
+module_i2c_driver(rtq9124_driver);
+
+MODULE_AUTHOR("ChiYuan Huang <cy_huang@richtek.com>");
+MODULE_DESCRIPTION("ASoC RTQ9124 Driver");
+MODULE_LICENSE("GPL");
-- 
2.34.1

Re: [PATCH v2 0/2] ASoC: Add Richtek RTQ9124 support

[Mark Brown]

On Mon, 09 Jun 2025 15:47:26 +0800, cy_huang@richtek.com wrote:
> This patch series adds Richtek RTQ9124 1x30W audio amplifier support.
> 
> v2:
> - Instead to add a dedicated rtq9124 document file, append the
>   description to the existed rt9123 yaml
> 
> ChiYuan Huang (2):
>   ASoC: dt-bindings: rt9123: Append RTQ9124 description
>   ASoC: codecs: Add support for Richtek RTQ9124
> 
> [...]

Applied to

   https://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound.git for-next

Thanks!

[1/2] ASoC: dt-bindings: rt9123: Append RTQ9124 description
      commit: 5c694e3a83d089df6b00747cf4627735ea14014e
[2/2] ASoC: codecs: Add support for Richtek RTQ9124
      commit: 1f5cdb6ab45e1c06ae0953609acbb52f8946b3e8

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.

If any updates are required or you are submitting further changes they
should be sent as incremental updates against current git, existing
patches will not be replaced.

Please add any relevant lists and maintainers to the CCs when replying
to this mail.

Thanks,
Mark