@@ -115,6 +115,7 @@ config SND_SOC_ALL_CODECS
imply SND_SOC_IDT821034
imply SND_SOC_INNO_RK3036
imply SND_SOC_ISABELLE
+ imply SND_SOC_JH7110_PWMDAC_DIT
imply SND_SOC_JZ4740_CODEC
imply SND_SOC_JZ4725B_CODEC
imply SND_SOC_JZ4760_CODEC
@@ -903,6 +904,9 @@ config SND_SOC_CX2072X
help
Enable support for Conexant CX20721 and CX20723 codec chips.
+config SND_SOC_JH7110_PWMDAC_DIT
+ tristate "StarFive JH7110 dummy PWM-DAC transmitter"
+
config SND_SOC_JZ4740_CODEC
depends on MACH_INGENIC || COMPILE_TEST
depends on OF
@@ -122,6 +122,7 @@ snd-soc-ics43432-objs := ics43432.o
snd-soc-idt821034-objs := idt821034.o
snd-soc-inno-rk3036-objs := inno_rk3036.o
snd-soc-isabelle-objs := isabelle.o
+snd-soc-jh7110-pwmdac-dit-objs := jh7110_pwmdac_transmitter.o
snd-soc-jz4740-codec-objs := jz4740.o
snd-soc-jz4725b-codec-objs := jz4725b.o
snd-soc-jz4760-codec-objs := jz4760.o
@@ -496,6 +497,7 @@ obj-$(CONFIG_SND_SOC_ICS43432) += snd-soc-ics43432.o
obj-$(CONFIG_SND_SOC_IDT821034) += snd-soc-idt821034.o
obj-$(CONFIG_SND_SOC_INNO_RK3036) += snd-soc-inno-rk3036.o
obj-$(CONFIG_SND_SOC_ISABELLE) += snd-soc-isabelle.o
+obj-$(CONFIG_SND_SOC_JH7110_PWMDAC_DIT) += snd-soc-jh7110-pwmdac-dit.o
obj-$(CONFIG_SND_SOC_JZ4740_CODEC) += snd-soc-jz4740-codec.o
obj-$(CONFIG_SND_SOC_JZ4725B_CODEC) += snd-soc-jz4725b-codec.o
obj-$(CONFIG_SND_SOC_JZ4760_CODEC) += snd-soc-jz4760-codec.o
new file mode 100644
@@ -0,0 +1,74 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Dummy PWM-DAC transmitter driver for the StarFive JH7110 SoC
+ *
+ * Copyright (C) 2021-2023 StarFive Technology Co., Ltd.
+ */
+
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/of.h>
+#include <linux/slab.h>
+#include <sound/initval.h>
+#include <sound/pcm.h>
+#include <sound/soc.h>
+
+#define DRV_NAME "pwmdac-dit"
+
+static const struct snd_soc_dapm_widget dit_widgets[] = {
+ SND_SOC_DAPM_OUTPUT("pwmdac-out"),
+};
+
+static const struct snd_soc_dapm_route dit_routes[] = {
+ { "pwmdac-out", NULL, "Playback" },
+};
+
+static const struct snd_soc_component_driver soc_codec_pwmdac_dit = {
+ .dapm_widgets = dit_widgets,
+ .num_dapm_widgets = ARRAY_SIZE(dit_widgets),
+ .dapm_routes = dit_routes,
+ .num_dapm_routes = ARRAY_SIZE(dit_routes),
+ .idle_bias_on = 1,
+ .use_pmdown_time = 1,
+ .endianness = 1,
+};
+
+static struct snd_soc_dai_driver dit_stub_dai = {
+ .name = "pwmdac-dit-hifi",
+ .playback = {
+ .stream_name = "Playback",
+ .channels_min = 1,
+ .channels_max = 384,
+ .rates = SNDRV_PCM_RATE_8000_48000,
+ .formats = SNDRV_PCM_FMTBIT_S16_LE,
+ },
+};
+
+static int pwmdac_dit_probe(struct platform_device *pdev)
+{
+ return devm_snd_soc_register_component(&pdev->dev,
+ &soc_codec_pwmdac_dit,
+ &dit_stub_dai, 1);
+}
+
+#ifdef CONFIG_OF
+static const struct of_device_id pwmdac_dit_dt_ids[] = {
+ { .compatible = "starfive,jh7110-pwmdac-dit", },
+ { }
+};
+MODULE_DEVICE_TABLE(of, pwmdac_dit_dt_ids);
+#endif
+
+static struct platform_driver pwmdac_dit_driver = {
+ .probe = pwmdac_dit_probe,
+ .driver = {
+ .name = DRV_NAME,
+ .of_match_table = of_match_ptr(pwmdac_dit_dt_ids),
+ },
+};
+
+module_platform_driver(pwmdac_dit_driver);
+
+MODULE_DESCRIPTION("StarFive JH7110 dummy PWM-DAC transmitter driver");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("platform:" DRV_NAME);
Add a dummy transmitter driver for StarFive JH7110 PWM-DAC module. StarFive JH7110 PWM-DAC controller uses this driver. Signed-off-by: Hal Feng <hal.feng@starfivetech.com> --- sound/soc/codecs/Kconfig | 4 ++ sound/soc/codecs/Makefile | 2 + sound/soc/codecs/jh7110_pwmdac_transmitter.c | 74 ++++++++++++++++++++ 3 files changed, 80 insertions(+) create mode 100644 sound/soc/codecs/jh7110_pwmdac_transmitter.c