openwrt/target/linux/ramips/patches-3.10/0301-asoc-add-mt7620-support.patch

From c72bc41d018519de5d63ec7790965fbf4605276a Mon Sep 17 00:00:00 2001
From: John Crispin <blogic@openwrt.org>
Date: Tue, 3 Dec 2013 20:18:13 +0100
Subject: [PATCH] asoc: add mt7620 support

Signed-off-by: John Crispin <blogic@openwrt.org>
---
 sound/soc/Kconfig                |    1 +
 sound/soc/Makefile               |    1 +
 sound/soc/ralink/Kconfig         |   24 +++
 sound/soc/ralink/Makefile        |   13 ++
 sound/soc/ralink/mt7620-i2s.c    |  429 ++++++++++++++++++++++++++++++++++++++
 sound/soc/ralink/mt7620-pcm.c    |   77 +++++++
 sound/soc/ralink/mt7620-wm8960.c |  124 +++++++++++
 7 files changed, 669 insertions(+)
 create mode 100644 sound/soc/ralink/Kconfig
 create mode 100644 sound/soc/ralink/Makefile
 create mode 100644 sound/soc/ralink/mt7620-i2s.c
 create mode 100644 sound/soc/ralink/mt7620-pcm.c
 create mode 100644 sound/soc/ralink/mt7620-wm8960.c

--- a/sound/soc/Kconfig
+++ b/sound/soc/Kconfig
@@ -48,6 +48,7 @@ source "sound/soc/kirkwood/Kconfig"
 source "sound/soc/mid-x86/Kconfig"
 source "sound/soc/mxs/Kconfig"
 source "sound/soc/pxa/Kconfig"
+source "sound/soc/ralink/Kconfig"
 source "sound/soc/samsung/Kconfig"
 source "sound/soc/s6000/Kconfig"
 source "sound/soc/sh/Kconfig"
--- a/sound/soc/Makefile
+++ b/sound/soc/Makefile
@@ -26,6 +26,7 @@ obj-$(CONFIG_SND_SOC)	+= nuc900/
 obj-$(CONFIG_SND_SOC)	+= omap/
 obj-$(CONFIG_SND_SOC)	+= kirkwood/
 obj-$(CONFIG_SND_SOC)	+= pxa/
+obj-$(CONFIG_SND_SOC)	+= ralink/
 obj-$(CONFIG_SND_SOC)	+= samsung/
 obj-$(CONFIG_SND_SOC)	+= s6000/
 obj-$(CONFIG_SND_SOC)	+= sh/
--- /dev/null
+++ b/sound/soc/ralink/Kconfig
@@ -0,0 +1,15 @@
+config SND_MT7620_SOC_I2S
+	depends on SOC_MT7620 && SND_SOC
+	select SND_SOC_GENERIC_DMAENGINE_PCM
+	tristate "SoC Audio (I2S protocol) for Ralink MT7620 SoC"
+	help
+	  Say Y if you want to use I2S protocol and I2S codec on Ingenic MT7620
+	  based boards.
+
+config SND_MT7620_SOC_WM8960
+	tristate "SoC Audio support for Ralink WM8960"
+	select SND_MT7620_SOC_I2S
+	select SND_SOC_WM8960
+	help
+	  Say Y if you want to add support for ASoC audio on the Qi LB60 board
+	  a.k.a Qi Ben NanoNote.
--- /dev/null
+++ b/sound/soc/ralink/Makefile
@@ -0,0 +1,11 @@
+#
+# Jz4740 Platform Support
+#
+snd-soc-mt7620-i2s-objs := mt7620-i2s.o
+
+obj-$(CONFIG_SND_MT7620_SOC_I2S) += snd-soc-mt7620-i2s.o
+
+# Jz4740 Machine Support
+snd-soc-mt7620-wm8960-objs := mt7620-wm8960.o
+
+obj-$(CONFIG_SND_MT7620_SOC_WM8960) += snd-soc-mt7620-wm8960.o
--- /dev/null
+++ b/sound/soc/ralink/mt7620-i2s.c
@@ -0,0 +1,466 @@
+/*
+ *  Copyright (C) 2010, Lars-Peter Clausen <lars@metafoo.de>
+ *
+ *  This program is free software; you can redistribute it and/or modify it
+ *  under  the terms of the GNU General  Public License as published by the
+ *  Free Software Foundation;  either version 2 of the License, or (at your
+ *  option) any later version.
+ *
+ *  You should have received a copy of the GNU General Public License along
+ *  with this program; if not, write to the Free Software Foundation, Inc.,
+ *  675 Mass Ave, Cambridge, MA 02139, USA.
+ *
+ */
+
+#include <linux/init.h>
+#include <linux/io.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/slab.h>
+
+#include <linux/delay.h>
+
+#include <linux/dma-mapping.h>
+
+#include <sound/core.h>
+#include <sound/pcm.h>
+#include <sound/pcm_params.h>
+#include <sound/soc.h>
+#include <sound/initval.h>
+#include <sound/dmaengine_pcm.h>
+
+#include <ralink_regs.h>
+
+#define I2S_REG_CFG0		0x00
+#define I2S_REG_CFG0_EN		BIT(31)
+#define I2S_REG_CFG0_DMA_EN	BIT(30)
+#define I2S_REG_CFG0_BYTE_SWAP	BIT(28)
+#define I2S_REG_CFG0_TX_EN	BIT(24)
+#define I2S_REG_CFG0_RX_EN	BIT(20)
+#define I2S_REG_CFG0_SLAVE	BIT(16)
+#define I2S_REG_CFG0_RX_THRES	12
+#define I2S_REG_CFG0_TX_THRES	4
+#define I2S_REG_CFG0_DFT_THRES	(4 << I2S_REG_CFG0_RX_THRES) | \
+					(4 << I2S_REG_CFG0_TX_THRES)
+
+#define I2S_REG_INT_STATUS	0x04
+#define I2S_REG_INT_EN		0x08
+#define I2S_REG_FF_STATUS	0x0c
+#define I2S_REG_WREG		0x10
+#define I2S_REG_RREG		0x14
+#define I2S_REG_CFG1		0x18
+
+#define I2S_REG_DIVCMP		0x20
+#define I2S_REG_DIVINT		0x24
+#define I2S_REG_CLK_EN		BIT(31)
+
+struct mt7620_i2s {
+	struct resource *mem;
+	void __iomem *base;
+	dma_addr_t phys_base;
+
+	struct snd_dmaengine_dai_dma_data playback_dma_data;
+	struct snd_dmaengine_dai_dma_data capture_dma_data;
+};
+
+static inline uint32_t mt7620_i2s_read(const struct mt7620_i2s *i2s,
+	unsigned int reg)
+{
+	return readl(i2s->base + reg);
+}
+
+static inline void mt7620_i2s_write(const struct mt7620_i2s *i2s,
+	unsigned int reg, uint32_t value)
+{
+	//printk("i2s --> %p = 0x%08X\n", i2s->base + reg, value);
+	writel(value, i2s->base + reg);
+}
+
+static int mt7620_i2s_startup(struct snd_pcm_substream *substream,
+	struct snd_soc_dai *dai)
+{
+	struct mt7620_i2s *i2s = snd_soc_dai_get_drvdata(dai);
+	uint32_t cfg;
+
+	if (dai->active)
+		return 0;
+
+	cfg = mt7620_i2s_read(i2s, I2S_REG_CFG0);
+	cfg |= I2S_REG_CFG0_EN;
+	mt7620_i2s_write(i2s, I2S_REG_CFG0, cfg);
+
+	return 0;
+}
+
+static void mt7620_i2s_shutdown(struct snd_pcm_substream *substream,
+	struct snd_soc_dai *dai)
+{
+	struct mt7620_i2s *i2s = snd_soc_dai_get_drvdata(dai);
+	uint32_t cfg;
+
+	if (dai->active)
+		return;
+
+	cfg = mt7620_i2s_read(i2s, I2S_REG_CFG0);
+	cfg &= ~I2S_REG_CFG0_EN;
+	mt7620_i2s_write(i2s, I2S_REG_CFG0, cfg);
+}
+
+static int mt7620_i2s_trigger(struct snd_pcm_substream *substream, int cmd,
+	struct snd_soc_dai *dai)
+{
+	struct mt7620_i2s *i2s = snd_soc_dai_get_drvdata(dai);
+
+	uint32_t cfg;
+	uint32_t mask;
+
+	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
+		mask = I2S_REG_CFG0_TX_EN;
+	else
+		mask = I2S_REG_CFG0_RX_EN;
+
+	cfg = mt7620_i2s_read(i2s, I2S_REG_CFG0);
+
+	switch (cmd) {
+	case SNDRV_PCM_TRIGGER_START:
+	case SNDRV_PCM_TRIGGER_RESUME:
+	case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
+		cfg |= mask;
+		break;
+	case SNDRV_PCM_TRIGGER_STOP:
+	case SNDRV_PCM_TRIGGER_SUSPEND:
+	case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
+		cfg &= ~mask;
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	if (cfg & (I2S_REG_CFG0_TX_EN | I2S_REG_CFG0_RX_EN))
+		cfg |= I2S_REG_CFG0_DMA_EN;
+	else
+		cfg &= ~I2S_REG_CFG0_DMA_EN;
+
+	mt7620_i2s_write(i2s, I2S_REG_CFG0, cfg);
+
+	return 0;
+}
+
+static int mt7620_i2s_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
+{
+	struct mt7620_i2s *i2s = snd_soc_dai_get_drvdata(dai);
+	uint32_t cfg;
+
+	cfg = mt7620_i2s_read(i2s, I2S_REG_CFG0);
+
+	switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
+	case SND_SOC_DAIFMT_CBS_CFS:
+		cfg |= I2S_REG_CFG0_SLAVE;
+		break;
+	case SND_SOC_DAIFMT_CBM_CFM:
+		cfg &= ~I2S_REG_CFG0_SLAVE;
+		break;
+	case SND_SOC_DAIFMT_CBM_CFS:
+	default:
+		return -EINVAL;
+	}
+
+	switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
+	case SND_SOC_DAIFMT_I2S:
+	case SND_SOC_DAIFMT_MSB:
+		cfg &= ~I2S_REG_CFG0_BYTE_SWAP;
+		break;
+	case SND_SOC_DAIFMT_LSB:
+		cfg |= I2S_REG_CFG0_BYTE_SWAP;
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
+	case SND_SOC_DAIFMT_NB_NF:
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	mt7620_i2s_write(i2s, I2S_REG_CFG0, cfg);
+
+	return 0;
+}
+
+static int mt7620_i2s_hw_params(struct snd_pcm_substream *substream,
+	struct snd_pcm_hw_params *params, struct snd_soc_dai *dai)
+{
+
+	return 0;
+}
+
+unsigned long i2sMaster_inclk_int[11] = {
+	78,     56,     52,     39,     28,     26,     19,     14,     13,     9,      6};
+unsigned long i2sMaster_inclk_comp[11] = {
+	64,     352,    42,     32,     176,    21,     272,    88,     10,     455,    261};
+
+
+static int mt7620_i2s_set_sysclk(struct snd_soc_dai *dai, int clk_id,
+	unsigned int freq, int dir)
+{
+        struct mt7620_i2s *i2s = snd_soc_dai_get_drvdata(dai);
+
+	printk("Internal REFCLK with fractional division\n");
+
+	mt7620_i2s_write(i2s, I2S_REG_DIVINT, i2sMaster_inclk_int[7]);
+	mt7620_i2s_write(i2s, I2S_REG_DIVCMP,
+		i2sMaster_inclk_comp[7] | I2S_REG_CLK_EN);
+
+/*	struct mt7620_i2s *i2s = snd_soc_dai_get_drvdata(dai);
+	struct clk *parent;
+	int ret = 0;
+
+	switch (clk_id) {
+	case JZ4740_I2S_CLKSRC_EXT:
+		parent = clk_get(NULL, "ext");
+		clk_set_parent(i2s->clk_i2s, parent);
+		break;
+	case JZ4740_I2S_CLKSRC_PLL:
+		parent = clk_get(NULL, "pll half");
+		clk_set_parent(i2s->clk_i2s, parent);
+		ret = clk_set_rate(i2s->clk_i2s, freq);
+		break;
+	default:
+		return -EINVAL;
+	}
+	clk_put(parent);
+
+	return ret;*/
+	return 0;
+}
+
+static int mt7620_i2s_suspend(struct snd_soc_dai *dai)
+{
+	struct mt7620_i2s *i2s = snd_soc_dai_get_drvdata(dai);
+	uint32_t cfg;
+
+	if (dai->active) {
+		cfg = mt7620_i2s_read(i2s, I2S_REG_CFG0);
+		cfg &= ~I2S_REG_CFG0_TX_EN;
+		mt7620_i2s_write(i2s, I2S_REG_CFG0, cfg);
+	}
+
+	return 0;
+}
+
+static int mt7620_i2s_resume(struct snd_soc_dai *dai)
+{
+	struct mt7620_i2s *i2s = snd_soc_dai_get_drvdata(dai);
+	uint32_t cfg;
+
+	if (dai->active) {
+		cfg = mt7620_i2s_read(i2s, I2S_REG_CFG0);
+		cfg |= I2S_REG_CFG0_TX_EN;
+		mt7620_i2s_write(i2s, I2S_REG_CFG0, cfg);
+	}
+
+	return 0;
+}
+
+static void mt7620_i2c_init_pcm_config(struct mt7620_i2s *i2s)
+{
+	struct snd_dmaengine_dai_dma_data *dma_data;
+
+	/* Playback */
+	dma_data = &i2s->playback_dma_data;
+	dma_data->maxburst = 16;
+	dma_data->slave_id = 2; //JZ4740_DMA_TYPE_AIC_TRANSMIT;
+	dma_data->addr = i2s->phys_base + I2S_REG_WREG;
+
+	/* Capture */
+	dma_data = &i2s->capture_dma_data;
+	dma_data->maxburst = 16;
+	dma_data->slave_id = 3; //JZ4740_DMA_TYPE_AIC_RECEIVE;
+	dma_data->addr = i2s->phys_base + I2S_REG_RREG;
+}
+
+static int mt7620_i2s_dai_probe(struct snd_soc_dai *dai)
+{
+	struct mt7620_i2s *i2s = snd_soc_dai_get_drvdata(dai);
+	uint32_t data;
+
+	mt7620_i2c_init_pcm_config(i2s);
+	dai->playback_dma_data = &i2s->playback_dma_data;
+	dai->capture_dma_data = &i2s->capture_dma_data;
+
+	/* set share pins to i2s/gpio mode and i2c mode */
+	data = rt_sysc_r32(0x60);
+	data &= 0xFFFFFFE2;
+	data |= 0x00000018;
+	rt_sysc_w32(data, 0x60);
+
+	printk("Internal REFCLK with fractional division\n");
+
+	mt7620_i2s_write(i2s, I2S_REG_CFG0, I2S_REG_CFG0_DFT_THRES);
+	mt7620_i2s_write(i2s, I2S_REG_CFG1, 0);
+	mt7620_i2s_write(i2s, I2S_REG_INT_EN, 0);
+
+	mt7620_i2s_write(i2s, I2S_REG_DIVINT, i2sMaster_inclk_int[7]);
+	mt7620_i2s_write(i2s, I2S_REG_DIVCMP,
+		i2sMaster_inclk_comp[7] | I2S_REG_CLK_EN);
+
+	return 0;
+}
+
+static int mt7620_i2s_dai_remove(struct snd_soc_dai *dai)
+{
+	return 0;
+}
+
+static const struct snd_soc_dai_ops mt7620_i2s_dai_ops = {
+	.startup = mt7620_i2s_startup,
+	.shutdown = mt7620_i2s_shutdown,
+	.trigger = mt7620_i2s_trigger,
+	.hw_params = mt7620_i2s_hw_params,
+	.set_fmt = mt7620_i2s_set_fmt,
+	.set_sysclk = mt7620_i2s_set_sysclk,
+};
+
+#define JZ4740_I2S_FMTS (SNDRV_PCM_FMTBIT_S8 | \
+		SNDRV_PCM_FMTBIT_S16_LE)
+
+static struct snd_soc_dai_driver mt7620_i2s_dai = {
+	.probe = mt7620_i2s_dai_probe,
+	.remove = mt7620_i2s_dai_remove,
+	.playback = {
+		.channels_min = 1,
+		.channels_max = 2,
+		.rates = SNDRV_PCM_RATE_8000_48000,
+		.formats = JZ4740_I2S_FMTS,
+	},
+	.capture = {
+		.channels_min = 2,
+		.channels_max = 2,
+		.rates = SNDRV_PCM_RATE_8000_48000,
+		.formats = JZ4740_I2S_FMTS,
+	},
+	.symmetric_rates = 1,
+	.ops = &mt7620_i2s_dai_ops,
+	.suspend = mt7620_i2s_suspend,
+	.resume = mt7620_i2s_resume,
+};
+
+static const struct snd_pcm_hardware mt7620_pcm_hardware = {
+	.info = SNDRV_PCM_INFO_MMAP |
+		SNDRV_PCM_INFO_MMAP_VALID |
+		SNDRV_PCM_INFO_INTERLEAVED |
+		SNDRV_PCM_INFO_BLOCK_TRANSFER,
+	.formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S8,
+	.period_bytes_min	= PAGE_SIZE,
+	.period_bytes_max	= 64 * 1024,
+	.periods_min		= 2,
+	.periods_max		= 128,
+	.buffer_bytes_max	= 128 * 1024,
+	.fifo_size		= 32,
+};
+
+static const struct snd_dmaengine_pcm_config mt7620_dmaengine_pcm_config = {
+	.prepare_slave_config = snd_dmaengine_pcm_prepare_slave_config,
+	.pcm_hardware = &mt7620_pcm_hardware,
+	.prealloc_buffer_size = 256 * PAGE_SIZE,
+};
+
+static const struct snd_soc_component_driver mt7620_i2s_component = {
+	.name = "mt7620-i2s",
+};
+
+static int mt7620_i2s_dev_probe(struct platform_device *pdev)
+{
+	struct mt7620_i2s *i2s;
+	int ret;
+
+	snd_dmaengine_pcm_register(&pdev->dev,
+		&mt7620_dmaengine_pcm_config,
+		SND_DMAENGINE_PCM_FLAG_COMPAT);
+
+	i2s = kzalloc(sizeof(*i2s), GFP_KERNEL);
+	if (!i2s)
+		return -ENOMEM;
+
+	i2s->mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	if (!i2s->mem) {
+		ret = -ENOENT;
+		goto err_free;
+	}
+
+	i2s->mem = request_mem_region(i2s->mem->start, resource_size(i2s->mem),
+				pdev->name);
+	if (!i2s->mem) {
+		ret = -EBUSY;
+		goto err_free;
+	}
+
+	i2s->base = ioremap_nocache(i2s->mem->start, resource_size(i2s->mem));
+	if (!i2s->base) {
+		ret = -EBUSY;
+		goto err_release_mem_region;
+	}
+
+	i2s->phys_base = i2s->mem->start;
+
+	platform_set_drvdata(pdev, i2s);
+	ret = snd_soc_register_component(&pdev->dev, &mt7620_i2s_component,
+					 &mt7620_i2s_dai, 1);
+
+	if (!ret) {
+		dev_err(&pdev->dev, "loaded\n");
+		return ret;
+	}
+
+	dev_err(&pdev->dev, "Failed to register DAI\n");
+	iounmap(i2s->base);
+
+err_release_mem_region:
+	release_mem_region(i2s->mem->start, resource_size(i2s->mem));
+err_free:
+	kfree(i2s);
+
+	return ret;
+}
+
+static int mt7620_i2s_dev_remove(struct platform_device *pdev)
+{
+	struct mt7620_i2s *i2s = platform_get_drvdata(pdev);
+
+	snd_soc_unregister_component(&pdev->dev);
+
+	iounmap(i2s->base);
+	release_mem_region(i2s->mem->start, resource_size(i2s->mem));
+
+	kfree(i2s);
+
+	snd_dmaengine_pcm_unregister(&pdev->dev);
+
+	return 0;
+}
+
+static const struct of_device_id mt7620_i2s_match[] = {
+	{ .compatible = "ralink,mt7620a-i2s" },
+	{},
+};
+MODULE_DEVICE_TABLE(of, mt7620_i2s_match);
+
+static struct platform_driver mt7620_i2s_driver = {
+	.probe = mt7620_i2s_dev_probe,
+	.remove = mt7620_i2s_dev_remove,
+	.driver = {
+		.name = "mt7620-i2s",
+		.owner = THIS_MODULE,
+		.of_match_table = mt7620_i2s_match,
+	},
+};
+
+module_platform_driver(mt7620_i2s_driver);
+
+MODULE_AUTHOR("Lars-Peter Clausen, <lars@metafoo.de>");
+MODULE_DESCRIPTION("Ingenic JZ4740 SoC I2S driver");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("platform:mt7620-i2s");
--- /dev/null
+++ b/sound/soc/ralink/mt7620-wm8960.c
@@ -0,0 +1,125 @@
+/*
+ * Copyright (C) 2009, Lars-Peter Clausen <lars@metafoo.de>
+ *
+ * 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.
+ *
+ *  You should have received a copy of the  GNU General Public License along
+ *  with this program; if not, write  to the Free Software Foundation, Inc.,
+ *  675 Mass Ave, Cambridge, MA 02139, USA.
+ *
+ */
+
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/of.h>
+#include <linux/timer.h>
+#include <linux/interrupt.h>
+#include <linux/platform_device.h>
+#include <sound/core.h>
+#include <sound/pcm.h>
+#include <sound/soc.h>
+
+
+static const struct snd_soc_dapm_widget mt7620_wm8960_widgets[] = {
+	SND_SOC_DAPM_SPK("Speaker", NULL),
+};
+
+static const struct snd_soc_dapm_route mt7620_wm8960_routes[] = {
+	{"Speaker", NULL, "HP_L"},
+	{"Speaker", NULL, "HP_R"},
+};
+
+#define MT7620_DAIFMT (SND_SOC_DAIFMT_I2S | \
+			SND_SOC_DAIFMT_NB_NF | \
+			SND_SOC_DAIFMT_CBM_CFM)
+
+static int mt7620_wm8960_codec_init(struct snd_soc_pcm_runtime *rtd)
+{
+	struct snd_soc_codec *codec = rtd->codec;
+	struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
+	struct snd_soc_dapm_context *dapm = &codec->dapm;
+	int ret;
+
+	snd_soc_dapm_enable_pin(dapm, "HP_L");
+	snd_soc_dapm_enable_pin(dapm, "HP_R");
+
+	ret = snd_soc_dai_set_fmt(cpu_dai, MT7620_DAIFMT);
+	if (ret < 0) {
+		dev_err(codec->dev, "Failed to set cpu dai format: %d\n", ret);
+		return ret;
+	}
+
+	return 0;
+}
+
+static struct snd_soc_dai_link mt7620_wm8960_dai = {
+	.name = "mt7620",
+	.stream_name = "mt7620",
+	.init = mt7620_wm8960_codec_init,
+	.codec_dai_name = "wm8960-hifi",
+};
+
+static struct snd_soc_card mt7620_wm8960 = {
+	.name = "mt7620-wm8960",
+	.owner = THIS_MODULE,
+	.dai_link = &mt7620_wm8960_dai,
+	.num_links = 1,
+
+	.dapm_widgets = mt7620_wm8960_widgets,
+	.num_dapm_widgets = ARRAY_SIZE(mt7620_wm8960_widgets),
+	.dapm_routes = mt7620_wm8960_routes,
+	.num_dapm_routes = ARRAY_SIZE(mt7620_wm8960_routes),
+};
+
+static int mt7620_wm8960_probe(struct platform_device *pdev)
+{
+	struct device_node *np = pdev->dev.of_node;
+	struct snd_soc_card *card = &mt7620_wm8960;
+	int ret;
+
+	card->dev = &pdev->dev;
+
+	mt7620_wm8960_dai.cpu_of_node = of_parse_phandle(np, "cpu-dai", 0);
+	mt7620_wm8960_dai.codec_of_node = of_parse_phandle(np, "codec-dai", 0);
+	mt7620_wm8960_dai.platform_of_node = mt7620_wm8960_dai.cpu_of_node;
+
+	ret = snd_soc_register_card(card);
+	if (ret) {
+		dev_err(&pdev->dev, "snd_soc_register_card() failed: %d\n",
+			ret);
+	}
+	return ret;
+}
+
+static int mt7620_wm8960_remove(struct platform_device *pdev)
+{
+	struct snd_soc_card *card = platform_get_drvdata(pdev);
+
+	snd_soc_unregister_card(card);
+	return 0;
+}
+
+static const struct of_device_id mt7620_audio_match[] = {
+	{ .compatible = "ralink,wm8960-audio" },
+	{},
+};
+MODULE_DEVICE_TABLE(of, mt7620_audio_match);
+
+static struct platform_driver mt7620_wm8960_driver = {
+	.driver		= {
+		.name	= "wm8960-audio",
+		.owner	= THIS_MODULE,
+		.of_match_table = mt7620_audio_match,
+	},
+	.probe		= mt7620_wm8960_probe,
+	.remove		= mt7620_wm8960_remove,
+};
+
+module_platform_driver(mt7620_wm8960_driver);
+
+MODULE_AUTHOR("Lars-Peter Clausen <lars@metafoo.de>");
+MODULE_DESCRIPTION("ALSA SoC QI LB60 Audio support");
+MODULE_LICENSE("GPL v2");
+MODULE_ALIAS("platform:qi-lb60-audio");
--- a/arch/mips/ralink/of.c
+++ b/arch/mips/ralink/of.c
@@ -15,6 +15,7 @@
 #include <linux/of_fdt.h>
 #include <linux/kernel.h>
 #include <linux/bootmem.h>
+#include <linux/module.h>
 #include <linux/of_platform.h>
 #include <linux/of_address.h>
 
@@ -25,6 +26,7 @@
 #include "common.h"
 
 __iomem void *rt_sysc_membase;
+EXPORT_SYMBOL(rt_sysc_membase);
 __iomem void *rt_memc_membase;
 
 extern struct boot_param_header __dtb_start;
--- a/sound/soc/soc-io.c
+++ b/sound/soc/soc-io.c
@@ -19,7 +19,6 @@
 
 #include <trace/events/asoc.h>
 
-#ifdef CONFIG_REGMAP
 static int hw_write(struct snd_soc_codec *codec, unsigned int reg,
 		    unsigned int value)
 {
@@ -161,12 +160,3 @@ int snd_soc_codec_set_cache_io(struct sn
 	return PTR_RET(codec->control_data);
 }
 EXPORT_SYMBOL_GPL(snd_soc_codec_set_cache_io);
-#else
-int snd_soc_codec_set_cache_io(struct snd_soc_codec *codec,
-			       int addr_bits, int data_bits,
-			       enum snd_soc_control_type control)
-{
-	return -ENOTSUPP;
-}
-EXPORT_SYMBOL_GPL(snd_soc_codec_set_cache_io);
-#endif