new file mode 100644
@@ -0,0 +1,16 @@
+WM8524 audio CODEC
+
+This device does not use I2C or SPI but a simple Hardware Control Interface.
+
+Required properties:
+
+ - compatible : "wlf,wm8524"
+
+ - wlf,mute-gpios: a GPIO spec for the MUTE pin.
+
+Example:
+
+codec: wm8524@0 {
+ compatible = "wlf,wm8524";
+ wlf,mute-gpios = <&gpio1 8 GPIO_ACTIVE_LOW>;
+};
@@ -174,6 +174,7 @@ config SND_SOC_ALL_CODECS
select SND_SOC_WM8400 if MFD_WM8400
select SND_SOC_WM8510 if SND_SOC_I2C_AND_SPI
select SND_SOC_WM8523 if I2C
+ select SND_SOC_WM8524 if GPIOLIB
select SND_SOC_WM8580 if I2C
select SND_SOC_WM8711 if SND_SOC_I2C_AND_SPI
select SND_SOC_WM8727
@@ -974,6 +975,10 @@ config SND_SOC_WM8523
tristate "Wolfson Microelectronics WM8523 DAC"
depends on I2C
+config SND_SOC_WM8524
+ tristate "Wolfson Microelectronics WM8524 DAC"
+ depends on GPIOLIB
+
config SND_SOC_WM8580
tristate "Wolfson Microelectronics WM8580 and WM8581 CODECs"
depends on I2C
@@ -183,6 +183,7 @@ snd-soc-wm8350-objs := wm8350.o
snd-soc-wm8400-objs := wm8400.o
snd-soc-wm8510-objs := wm8510.o
snd-soc-wm8523-objs := wm8523.o
+snd-soc-wm8524-objs := wm8524.o
snd-soc-wm8580-objs := wm8580.o
snd-soc-wm8711-objs := wm8711.o
snd-soc-wm8727-objs := wm8727.o
@@ -416,6 +417,7 @@ obj-$(CONFIG_SND_SOC_WM8350) += snd-soc-wm8350.o
obj-$(CONFIG_SND_SOC_WM8400) += snd-soc-wm8400.o
obj-$(CONFIG_SND_SOC_WM8510) += snd-soc-wm8510.o
obj-$(CONFIG_SND_SOC_WM8523) += snd-soc-wm8523.o
+obj-$(CONFIG_SND_SOC_WM8524) += snd-soc-wm8524.o
obj-$(CONFIG_SND_SOC_WM8580) += snd-soc-wm8580.o
obj-$(CONFIG_SND_SOC_WM8711) += snd-soc-wm8711.o
obj-$(CONFIG_SND_SOC_WM8727) += snd-soc-wm8727.o
new file mode 100644
@@ -0,0 +1,265 @@
+/*
+ * wm8524.c -- WM8524 ALSA SoC Audio driver
+ *
+ * Copyright 2009 Wolfson Microelectronics plc
+ * Copyright 2017 NXP
+ *
+ * Based on WM8523 ALSA SoC Audio driver written by Mark Brown
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/init.h>
+#include <linux/delay.h>
+#include <linux/slab.h>
+#include <linux/gpio/consumer.h>
+#include <linux/of_device.h>
+#include <sound/core.h>
+#include <sound/pcm.h>
+#include <sound/pcm_params.h>
+#include <sound/soc.h>
+#include <sound/initval.h>
+
+#define WM8524_NUM_RATES 7
+
+/* codec private data */
+struct wm8524_priv {
+ struct gpio_desc *mute;
+ unsigned int sysclk;
+ unsigned int rate_constraint_list[WM8524_NUM_RATES];
+ struct snd_pcm_hw_constraint_list rate_constraint;
+};
+
+
+static const struct snd_soc_dapm_widget wm8524_dapm_widgets[] = {
+SND_SOC_DAPM_DAC("DAC", "Playback", SND_SOC_NOPM, 0, 0),
+SND_SOC_DAPM_OUTPUT("LINEVOUTL"),
+SND_SOC_DAPM_OUTPUT("LINEVOUTR"),
+};
+
+static const struct snd_soc_dapm_route wm8524_dapm_routes[] = {
+ { "LINEVOUTL", NULL, "DAC" },
+ { "LINEVOUTR", NULL, "DAC" },
+};
+
+static const struct {
+ int value;
+ int ratio;
+} lrclk_ratios[WM8524_NUM_RATES] = {
+ { 1, 128 },
+ { 2, 192 },
+ { 3, 256 },
+ { 4, 384 },
+ { 5, 512 },
+ { 6, 768 },
+ { 7, 1152 },
+};
+
+static int wm8524_startup(struct snd_pcm_substream *substream,
+ struct snd_soc_dai *dai)
+{
+ struct snd_soc_codec *codec = dai->codec;
+ struct wm8524_priv *wm8524 = snd_soc_codec_get_drvdata(codec);
+
+ /* The set of sample rates that can be supported depends on the
+ * MCLK supplied to the CODEC - enforce this.
+ */
+ if (!wm8524->sysclk) {
+ dev_err(codec->dev,
+ "No MCLK configured, call set_sysclk() on init\n");
+ return -EINVAL;
+ }
+
+ snd_pcm_hw_constraint_list(substream->runtime, 0,
+ SNDRV_PCM_HW_PARAM_RATE,
+ &wm8524->rate_constraint);
+
+ gpiod_set_value_cansleep(wm8524->mute, 1);
+
+ return 0;
+}
+
+static void wm8524_shutdown(struct snd_pcm_substream *substream,
+ struct snd_soc_dai *dai)
+{
+ struct snd_soc_codec *codec = dai->codec;
+ struct wm8524_priv *wm8524 = snd_soc_codec_get_drvdata(codec);
+
+ gpiod_set_value_cansleep(wm8524->mute, 0);
+}
+
+static int wm8524_set_dai_sysclk(struct snd_soc_dai *codec_dai,
+ int clk_id, unsigned int freq, int dir)
+{
+ struct snd_soc_codec *codec = codec_dai->codec;
+ struct wm8524_priv *wm8524 = snd_soc_codec_get_drvdata(codec);
+ unsigned int val;
+ int i, j = 0;
+
+ wm8524->sysclk = freq;
+
+ wm8524->rate_constraint.count = 0;
+ for (i = 0; i < ARRAY_SIZE(lrclk_ratios); i++) {
+ val = freq / lrclk_ratios[i].ratio;
+ /* Check that it's a standard rate since core can't
+ * cope with others and having the odd rates confuses
+ * constraint matching.
+ */
+ switch (val) {
+ case 8000:
+ case 32000:
+ case 44100:
+ case 48000:
+ case 88200:
+ case 96000:
+ case 176400:
+ case 192000:
+ dev_err(codec->dev, "Supported sample rate: %dHz\n",
+ val);
+ wm8524->rate_constraint_list[j++] = val;
+ wm8524->rate_constraint.count++;
+ break;
+ default:
+ dev_dbg(codec->dev, "Skipping sample rate: %dHz\n",
+ val);
+ }
+ }
+
+ /* Need at least one supported rate... */
+ if (wm8524->rate_constraint.count == 0)
+ return -EINVAL;
+
+ return 0;
+}
+
+static int wm8524_set_fmt(struct snd_soc_dai *codec_dai, unsigned int fmt)
+{
+ fmt &= (SND_SOC_DAIFMT_FORMAT_MASK | SND_SOC_DAIFMT_INV_MASK |
+ SND_SOC_DAIFMT_MASTER_MASK);
+
+ if (fmt != (SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
+ SND_SOC_DAIFMT_CBS_CFS)) {
+ dev_err(codec_dai->dev, "Invalid DAI format\n");
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static int wm8524_mute_stream(struct snd_soc_dai *dai, int mute, int stream)
+{
+ struct wm8524_priv *wm8524 = snd_soc_codec_get_drvdata(dai->codec);
+
+ if (wm8524->mute)
+ gpiod_set_value_cansleep(wm8524->mute, mute);
+
+ return 0;
+}
+
+#define WM8524_RATES SNDRV_PCM_RATE_8000_192000
+
+#define WM8524_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S24_LE)
+
+static const struct snd_soc_dai_ops wm8524_dai_ops = {
+ .startup = wm8524_startup,
+ .shutdown = wm8524_shutdown,
+ .set_sysclk = wm8524_set_dai_sysclk,
+ .set_fmt = wm8524_set_fmt,
+ .mute_stream = wm8524_mute_stream,
+};
+
+static struct snd_soc_dai_driver wm8524_dai = {
+ .name = "wm8524-hifi",
+ .playback = {
+ .stream_name = "Playback",
+ .channels_min = 2,
+ .channels_max = 2,
+ .rates = WM8524_RATES,
+ .formats = WM8524_FORMATS,
+ },
+ .ops = &wm8524_dai_ops,
+};
+
+static int wm8524_probe(struct snd_soc_codec *codec)
+{
+ struct wm8524_priv *wm8524 = snd_soc_codec_get_drvdata(codec);
+
+ wm8524->rate_constraint.list = &wm8524->rate_constraint_list[0];
+ wm8524->rate_constraint.count =
+ ARRAY_SIZE(wm8524->rate_constraint_list);
+
+ return 0;
+}
+
+static const struct snd_soc_codec_driver soc_codec_dev_wm8524 = {
+ .probe = wm8524_probe,
+
+ .component_driver = {
+ .dapm_widgets = wm8524_dapm_widgets,
+ .num_dapm_widgets = ARRAY_SIZE(wm8524_dapm_widgets),
+ .dapm_routes = wm8524_dapm_routes,
+ .num_dapm_routes = ARRAY_SIZE(wm8524_dapm_routes),
+ },
+};
+
+#ifdef CONFIG_OF
+static const struct of_device_id wm8524_of_match[] = {
+ { .compatible = "wlf,wm8524" },
+ { /* sentinel*/ }
+};
+MODULE_DEVICE_TABLE(of, wm8524_of_match);
+#endif
+
+static int wm8524_codec_probe(struct platform_device *pdev)
+{
+ struct wm8524_priv *wm8524;
+ int ret;
+
+ wm8524 = devm_kzalloc(&pdev->dev, sizeof(struct wm8524_priv),
+ GFP_KERNEL);
+ if (wm8524 == NULL)
+ return -ENOMEM;
+
+ platform_set_drvdata(pdev, wm8524);
+
+ wm8524->mute = devm_gpiod_get(&pdev->dev, "wlf,mute", GPIOD_OUT_LOW);
+ if (IS_ERR(wm8524->mute)) {
+ ret = PTR_ERR(wm8524->mute);
+ dev_err(&pdev->dev, "Failed to get mute line: %d\n", ret);
+ return ret;
+ }
+
+ ret = snd_soc_register_codec(&pdev->dev,
+ &soc_codec_dev_wm8524, &wm8524_dai, 1);
+ if (ret < 0) {
+ dev_err(&pdev->dev, "Failed to register codec: %d\n", ret);
+ snd_soc_unregister_platform(&pdev->dev);
+ }
+
+ return ret;
+}
+
+static int wm8524_codec_remove(struct platform_device *pdev)
+{
+ snd_soc_unregister_codec(&pdev->dev);
+ return 0;
+}
+
+static struct platform_driver wm8524_codec_driver = {
+ .probe = wm8524_codec_probe,
+ .remove = wm8524_codec_remove,
+ .driver = {
+ .name = "wm8524-codec",
+ .of_match_table = wm8524_of_match,
+ },
+};
+module_platform_driver(wm8524_codec_driver);
+
+MODULE_DESCRIPTION("ASoC WM8524 driver");
+MODULE_AUTHOR("Mihai Serban <mihai.serban@nxp.com>");
+MODULE_ALIAS("platform:wm8524-codec");
+MODULE_LICENSE("GPL");