path: root/target/linux/brcm2708/patches-3.14/0049-Add-IQaudIO-Sound-Card-support-for-Raspberry-Pi.patch

From deaa651db204a6add9cb0189350922625fd1a311 Mon Sep 17 00:00:00 2001
From: Gordon Garrity <gordon@iqaudio.com>
Date: Sat, 8 Mar 2014 16:56:57 +0000
Subject: [PATCH 49/54] Add IQaudIO Sound Card support for Raspberry Pi

---
 arch/arm/configs/bcmrpi_defconfig |   1 +
 arch/arm/mach-bcm2708/bcm2708.c   |  22 ++
 sound/soc/bcm/Kconfig             |   7 +
 sound/soc/bcm/Makefile            |   2 +
 sound/soc/bcm/iqaudio-dac.c       | 111 +++++++
 sound/soc/codecs/Kconfig          |   4 +
 sound/soc/codecs/Makefile         |   2 +
 sound/soc/codecs/pcm512x.c        | 677 ++++++++++++++++++++++++++++++++++++++
 sound/soc/codecs/pcm512x.h        | 142 ++++++++
 9 files changed, 968 insertions(+)
 create mode 100644 sound/soc/bcm/iqaudio-dac.c
 create mode 100644 sound/soc/codecs/pcm512x.c
 create mode 100644 sound/soc/codecs/pcm512x.h

diff --git a/arch/arm/configs/bcmrpi_defconfig b/arch/arm/configs/bcmrpi_defconfig
index 3d3c8ab..a024670 100644
--- a/arch/arm/configs/bcmrpi_defconfig
+++ b/arch/arm/configs/bcmrpi_defconfig
@@ -750,6 +750,7 @@ CONFIG_SND_BCM2708_SOC_RPI_DAC=m
 CONFIG_SND_SOC_I2C_AND_SPI=m
 CONFIG_SND_SOC_PCM5102A=m
 CONFIG_SND_SOC_PCM1794A=m
+CONFIG_SND_BCM2708_SOC_IQAUDIO_DAC=m
 CONFIG_SOUND_PRIME=m
 CONFIG_HIDRAW=y
 CONFIG_HID_A4TECH=m
diff --git a/arch/arm/mach-bcm2708/bcm2708.c b/arch/arm/mach-bcm2708/bcm2708.c
index beb2eca..95a47fa 100644
--- a/arch/arm/mach-bcm2708/bcm2708.c
+++ b/arch/arm/mach-bcm2708/bcm2708.c
@@ -680,6 +680,22 @@ static struct platform_device snd_pcm1794a_codec_device = {
 };
 #endif
 
+
+#if defined(CONFIG_SND_BCM2708_SOC_IQAUDIO_DAC) || defined(CONFIG_SND_BCM2708_SOC_IQAUDIO_DAC_MODULE)
+static struct platform_device snd_rpi_iqaudio_dac_device = {
+        .name = "snd-rpi-iqaudio-dac",
+        .id = 0,
+        .num_resources = 0,
+};
+
+// Use the actual device name rather than generic driver name
+static struct i2c_board_info __initdata snd_pcm512x_i2c_devices[] = {
+	{
+		I2C_BOARD_INFO("pcm5122", 0x4c)
+	},
+};
+#endif
+
 int __init bcm_register_device(struct platform_device *pdev)
 {
 	int ret;
@@ -822,6 +838,12 @@ void __init bcm2708_init(void)
         bcm_register_device(&snd_pcm1794a_codec_device);
 #endif
 
+#if defined(CONFIG_SND_BCM2708_SOC_IQAUDIO_DAC) || defined(CONFIG_SND_BCM2708_SOC_IQAUDIO_DAC_MODULE)
+        bcm_register_device(&snd_rpi_iqaudio_dac_device);
+        i2c_register_board_info(1, snd_pcm512x_i2c_devices, ARRAY_SIZE(snd_pcm512x_i2c_devices));
+#endif
+
+
 	for (i = 0; i < ARRAY_SIZE(amba_devs); i++) {
 		struct amba_device *d = amba_devs[i];
 		amba_device_register(d, &iomem_resource);
diff --git a/sound/soc/bcm/Kconfig b/sound/soc/bcm/Kconfig
index e563dbc..84e4f27 100644
--- a/sound/soc/bcm/Kconfig
+++ b/sound/soc/bcm/Kconfig
@@ -39,3 +39,10 @@ config SND_BCM2708_SOC_RPI_DAC
         select SND_SOC_PCM1794A
         help
          Say Y or M if you want to add support for RPi-DAC.
+
+config SND_BCM2708_SOC_IQAUDIO_DAC
+	tristate "Support for IQaudIO-DAC"
+	depends on SND_BCM2708_SOC_I2S
+	select SND_SOC_PCM512x
+	help
+	  Say Y or M if you want to add support for IQaudIO-DAC.
diff --git a/sound/soc/bcm/Makefile b/sound/soc/bcm/Makefile
index 826df7d..d597fb0 100644
--- a/sound/soc/bcm/Makefile
+++ b/sound/soc/bcm/Makefile
@@ -12,7 +12,9 @@ obj-$(CONFIG_SND_BCM2708_SOC_I2S) += snd-soc-bcm2708-i2s.o
 snd-soc-hifiberry-dac-objs := hifiberry_dac.o
 snd-soc-hifiberry-digi-objs := hifiberry_digi.o
 snd-soc-rpi-dac-objs := rpi-dac.o
+snd-soc-iqaudio-dac-objs := iqaudio-dac.o
 
 obj-$(CONFIG_SND_BCM2708_SOC_HIFIBERRY_DAC) += snd-soc-hifiberry-dac.o
 obj-$(CONFIG_SND_BCM2708_SOC_HIFIBERRY_DIGI) += snd-soc-hifiberry-digi.o
 obj-$(CONFIG_SND_BCM2708_SOC_RPI_DAC) += snd-soc-rpi-dac.o
+obj-$(CONFIG_SND_BCM2708_SOC_IQAUDIO_DAC) += snd-soc-iqaudio-dac.o
diff --git a/sound/soc/bcm/iqaudio-dac.c b/sound/soc/bcm/iqaudio-dac.c
new file mode 100644
index 0000000..515f044
--- /dev/null
+++ b/sound/soc/bcm/iqaudio-dac.c
@@ -0,0 +1,111 @@
+/*
+ * ASoC Driver for IQaudIO DAC
+ *
+ * Author:	Florian Meier <florian.meier@koalo.de>
+ *		Copyright 2013
+ *
+ * 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.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ */
+
+#include <linux/module.h>
+#include <linux/platform_device.h>
+
+#include <sound/core.h>
+#include <sound/pcm.h>
+#include <sound/pcm_params.h>
+#include <sound/soc.h>
+#include <sound/jack.h>
+
+static int snd_rpi_iqaudio_dac_init(struct snd_soc_pcm_runtime *rtd)
+{
+// NOT USED	struct snd_soc_codec *codec = rtd->codec;
+
+	return 0;
+}
+
+static int snd_rpi_iqaudio_dac_hw_params(struct snd_pcm_substream *substream,
+				       struct snd_pcm_hw_params *params)
+{
+	struct snd_soc_pcm_runtime *rtd = substream->private_data;
+// NOT USED	struct snd_soc_dai *codec_dai = rtd->codec_dai;
+// NOT USED	struct snd_soc_codec *codec = rtd->codec;
+	struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
+
+	unsigned int sample_bits =
+		snd_pcm_format_physical_width(params_format(params));
+
+	return snd_soc_dai_set_bclk_ratio(cpu_dai, sample_bits * 2);
+}
+
+/* machine stream operations */
+static struct snd_soc_ops snd_rpi_iqaudio_dac_ops = {
+	.hw_params = snd_rpi_iqaudio_dac_hw_params,
+};
+
+static struct snd_soc_dai_link snd_rpi_iqaudio_dac_dai[] = {
+{
+	.name		= "IQaudIO DAC",
+	.stream_name	= "IQaudIO DAC HiFi",
+	.cpu_dai_name	= "bcm2708-i2s.0",
+	.codec_dai_name	= "pcm512x-hifi",
+	.platform_name	= "bcm2708-i2s.0",
+	.codec_name	= "pcm512x.1-004c",
+	.dai_fmt	= SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
+				SND_SOC_DAIFMT_CBS_CFS,
+	.ops		= &snd_rpi_iqaudio_dac_ops,
+	.init		= snd_rpi_iqaudio_dac_init,
+},
+};
+
+/* audio machine driver */
+static struct snd_soc_card snd_rpi_iqaudio_dac = {
+	.name         = "snd_rpi_iqaudio_dac",
+	.dai_link     = snd_rpi_iqaudio_dac_dai,
+	.num_links    = ARRAY_SIZE(snd_rpi_iqaudio_dac_dai),
+};
+
+static int snd_rpi_iqaudio_dac_probe(struct platform_device *pdev)
+{
+	int ret = 0;
+
+	snd_rpi_iqaudio_dac.dev = &pdev->dev;
+	ret = snd_soc_register_card(&snd_rpi_iqaudio_dac);
+	if (ret)
+		dev_err(&pdev->dev,
+			"snd_soc_register_card() failed: %d\n", ret);
+
+	return ret;
+}
+
+static int snd_rpi_iqaudio_dac_remove(struct platform_device *pdev)
+{
+	return snd_soc_unregister_card(&snd_rpi_iqaudio_dac);
+}
+
+static const struct of_device_id iqaudio_of_match[] = {
+	{ .compatible = "iqaudio,iqaudio-dac", },
+	{},
+};
+
+static struct platform_driver snd_rpi_iqaudio_dac_driver = {
+	.driver = {
+		.name   = "snd-rpi-iqaudio-dac",
+		.owner  = THIS_MODULE,
+		.of_match_table = iqaudio_of_match,
+	},
+	.probe          = snd_rpi_iqaudio_dac_probe,
+	.remove         = snd_rpi_iqaudio_dac_remove,
+};
+
+module_platform_driver(snd_rpi_iqaudio_dac_driver);
+
+MODULE_AUTHOR("Florian Meier <florian.meier@koalo.de>");
+MODULE_DESCRIPTION("ASoC Driver for IQAudio DAC");
+MODULE_LICENSE("GPL v2");
diff --git a/sound/soc/codecs/Kconfig b/sound/soc/codecs/Kconfig
index 4d2569e..ac28805 100644
--- a/sound/soc/codecs/Kconfig
+++ b/sound/soc/codecs/Kconfig
@@ -61,6 +61,7 @@ config SND_SOC_ALL_CODECS
 	select SND_SOC_PCM3008
 	select SND_SOC_PCM1794A
 	select SND_SOC_PCM5102A
+	select SND_SOC_PCM512x if SND_SOC_I2C_AND_SPI
 	select SND_SOC_RT5631 if I2C
 	select SND_SOC_RT5640 if I2C
 	select SND_SOC_SGTL5000 if I2C
@@ -321,6 +322,9 @@ config SND_SOC_PCM1794A
 config SND_SOC_PCM5102A
 	tristate
 
+config SND_SOC_PCM512x
+       tristate
+
 config SND_SOC_RT5631
 	tristate
 
diff --git a/sound/soc/codecs/Makefile b/sound/soc/codecs/Makefile
index 9b806a2..61461c1 100644
--- a/sound/soc/codecs/Makefile
+++ b/sound/soc/codecs/Makefile
@@ -48,6 +48,7 @@ snd-soc-pcm1792a-codec-objs := pcm1792a.o
 snd-soc-pcm3008-objs := pcm3008.o
 snd-soc-pcm1794a-objs := pcm1794a.o
 snd-soc-pcm5102a-objs := pcm5102a.o
+snd-soc-pcm512x-objs := pcm512x.o
 snd-soc-rt5631-objs := rt5631.o
 snd-soc-rt5640-objs := rt5640.o
 snd-soc-sgtl5000-objs := sgtl5000.o
@@ -183,6 +184,7 @@ obj-$(CONFIG_SND_SOC_PCM1792A)	+= snd-soc-pcm1792a-codec.o
 obj-$(CONFIG_SND_SOC_PCM3008)	+= snd-soc-pcm3008.o
 obj-$(CONFIG_SND_SOC_PCM1794A)	+= snd-soc-pcm1794a.o
 obj-$(CONFIG_SND_SOC_PCM5102A)	+= snd-soc-pcm5102a.o
+obj-$(CONFIG_SND_SOC_PCM512x)	+= snd-soc-pcm512x.o
 obj-$(CONFIG_SND_SOC_RT5631)	+= snd-soc-rt5631.o
 obj-$(CONFIG_SND_SOC_RT5640)	+= snd-soc-rt5640.o
 obj-$(CONFIG_SND_SOC_SGTL5000)  += snd-soc-sgtl5000.o
diff --git a/sound/soc/codecs/pcm512x.c b/sound/soc/codecs/pcm512x.c
new file mode 100644
index 0000000..55b6200
--- /dev/null
+++ b/sound/soc/codecs/pcm512x.c
@@ -0,0 +1,677 @@
+/*
+ * Driver for the PCM512x CODECs
+ *
+ * Author:	Mark Brown <broonie@linaro.org>
+ *		Copyright 2014 Linaro Ltd
+ *
+ * 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.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ */
+
+
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/clk.h>
+#include <linux/i2c.h>
+#include <linux/pm_runtime.h>
+#include <linux/regmap.h>
+#include <linux/regulator/consumer.h>
+#include <linux/spi/spi.h>
+#include <sound/soc.h>
+#include <sound/soc-dapm.h>
+#include <sound/tlv.h>
+
+#include "pcm512x.h"
+
+#define PCM512x_NUM_SUPPLIES 3
+static const char *pcm512x_supply_names[PCM512x_NUM_SUPPLIES] = {
+	"AVDD",
+	"DVDD",
+	"CPVDD",
+};
+
+struct pcm512x_priv {
+	struct regmap *regmap;
+	struct clk *sclk;
+	struct regulator_bulk_data supplies[PCM512x_NUM_SUPPLIES];
+	struct notifier_block supply_nb[PCM512x_NUM_SUPPLIES];
+};
+
+/*
+ * We can't use the same notifier block for more than one supply and
+ * there's no way I can see to get from a callback to the caller
+ * except container_of().
+ */
+#define PCM512x_REGULATOR_EVENT(n) \
+static int pcm512x_regulator_event_##n(struct notifier_block *nb, \
+				      unsigned long event, void *data)    \
+{ \
+	struct pcm512x_priv *pcm512x = container_of(nb, struct pcm512x_priv, \
+						    supply_nb[n]); \
+	if (event & REGULATOR_EVENT_DISABLE) { \
+		regcache_mark_dirty(pcm512x->regmap);	\
+		regcache_cache_only(pcm512x->regmap, true);	\
+	} \
+	return 0; \
+}
+
+PCM512x_REGULATOR_EVENT(0)
+PCM512x_REGULATOR_EVENT(1)
+PCM512x_REGULATOR_EVENT(2)
+
+static const struct reg_default pcm512x_reg_defaults[] = {
+	{ PCM512x_RESET,            0x00 },
+	{ PCM512x_POWER,            0x00 },
+	{ PCM512x_MUTE,             0x00 },
+	{ PCM512x_DSP,              0x00 },
+	{ PCM512x_PLL_REF,          0x00 },
+	{ PCM512x_DAC_ROUTING,      0x11 },
+	{ PCM512x_DSP_PROGRAM,      0x01 },
+	{ PCM512x_CLKDET,           0x00 },
+	{ PCM512x_AUTO_MUTE,        0x00 },
+	{ PCM512x_ERROR_DETECT,     0x00 },
+	{ PCM512x_DIGITAL_VOLUME_1, 0x00 },
+	{ PCM512x_DIGITAL_VOLUME_2, 0x30 },
+	{ PCM512x_DIGITAL_VOLUME_3, 0x30 },
+	{ PCM512x_DIGITAL_MUTE_1,   0x22 },
+	{ PCM512x_DIGITAL_MUTE_2,   0x00 },
+	{ PCM512x_DIGITAL_MUTE_3,   0x07 },
+};
+
+static bool pcm512x_readable(struct device *dev, unsigned int reg)
+{
+	switch (reg) {
+	case PCM512x_RESET:
+	case PCM512x_POWER:
+	case PCM512x_MUTE:
+	case PCM512x_PLL_EN:
+	case PCM512x_SPI_MISO_FUNCTION:
+	case PCM512x_DSP:
+	case PCM512x_GPIO_EN:
+	case PCM512x_BCLK_LRCLK_CFG:
+	case PCM512x_DSP_GPIO_INPUT:
+	case PCM512x_MASTER_MODE:
+	case PCM512x_PLL_REF:
+	case PCM512x_PLL_COEFF_0:
+	case PCM512x_PLL_COEFF_1:
+	case PCM512x_PLL_COEFF_2:
+	case PCM512x_PLL_COEFF_3:
+	case PCM512x_PLL_COEFF_4:
+	case PCM512x_DSP_CLKDIV:
+	case PCM512x_DAC_CLKDIV:
+	case PCM512x_NCP_CLKDIV:
+	case PCM512x_OSR_CLKDIV:
+	case PCM512x_MASTER_CLKDIV_1:
+	case PCM512x_MASTER_CLKDIV_2:
+	case PCM512x_FS_SPEED_MODE:
+	case PCM512x_IDAC_1:
+	case PCM512x_IDAC_2:
+	case PCM512x_ERROR_DETECT:
+	case PCM512x_I2S_1:
+	case PCM512x_I2S_2:
+	case PCM512x_DAC_ROUTING:
+	case PCM512x_DSP_PROGRAM:
+	case PCM512x_CLKDET:
+	case PCM512x_AUTO_MUTE:
+	case PCM512x_DIGITAL_VOLUME_1:
+	case PCM512x_DIGITAL_VOLUME_2:
+	case PCM512x_DIGITAL_VOLUME_3:
+	case PCM512x_DIGITAL_MUTE_1:
+	case PCM512x_DIGITAL_MUTE_2:
+	case PCM512x_DIGITAL_MUTE_3:
+	case PCM512x_GPIO_OUTPUT_1:
+	case PCM512x_GPIO_OUTPUT_2:
+	case PCM512x_GPIO_OUTPUT_3:
+	case PCM512x_GPIO_OUTPUT_4:
+	case PCM512x_GPIO_OUTPUT_5:
+	case PCM512x_GPIO_OUTPUT_6:
+	case PCM512x_GPIO_CONTROL_1:
+	case PCM512x_GPIO_CONTROL_2:
+	case PCM512x_OVERFLOW:
+	case PCM512x_RATE_DET_1:
+	case PCM512x_RATE_DET_2:
+	case PCM512x_RATE_DET_3:
+	case PCM512x_RATE_DET_4:
+	case PCM512x_ANALOG_MUTE_DET:
+	case PCM512x_GPIN:
+	case PCM512x_DIGITAL_MUTE_DET:
+		return true;
+	default:
+		return false;
+	}
+}
+
+static bool pcm512x_volatile(struct device *dev, unsigned int reg)
+{
+	switch (reg) {
+	case PCM512x_PLL_EN:
+	case PCM512x_OVERFLOW:
+	case PCM512x_RATE_DET_1:
+	case PCM512x_RATE_DET_2:
+	case PCM512x_RATE_DET_3:
+	case PCM512x_RATE_DET_4:
+	case PCM512x_ANALOG_MUTE_DET:
+	case PCM512x_GPIN:
+	case PCM512x_DIGITAL_MUTE_DET:
+		return true;
+	default:
+		return false;
+	}
+}
+
+static const DECLARE_TLV_DB_SCALE(digital_tlv, -10350, 50, 1);
+
+static const char *pcm512x_dsp_program_texts[] = {
+	"FIR interpolation with de-emphasis",
+	"Low latency IIR with de-emphasis",
+	"High attenuation with de-emphasis",
+	"Ringing-less low latency FIR",
+};
+
+static const unsigned int pcm512x_dsp_program_values[] = {
+	1,
+	2,
+	3,
+	5,
+	7,
+};
+
+static const SOC_VALUE_ENUM_SINGLE_DECL(pcm512x_dsp_program,
+					PCM512x_DSP_PROGRAM, 0, 0x1f,
+					pcm512x_dsp_program_texts,
+					pcm512x_dsp_program_values);
+
+static const char *pcm512x_clk_missing_text[] = {
+	"1s", "2s", "3s", "4s", "5s", "6s", "7s", "8s"
+};
+
+static const struct soc_enum pcm512x_clk_missing =
+	SOC_ENUM_SINGLE(PCM512x_CLKDET, 0,  7, pcm512x_clk_missing_text);
+
+static const char *pcm512x_autom_text[] = {
+	"21ms", "106ms", "213ms", "533ms", "1.07s", "2.13s", "5.33s", "10.66s"
+};
+
+static const struct soc_enum pcm512x_autom_l =
+	SOC_ENUM_SINGLE(PCM512x_AUTO_MUTE, PCM512x_ATML_SHIFT, 7,
+			pcm512x_autom_text);
+
+static const struct soc_enum pcm512x_autom_r =
+	SOC_ENUM_SINGLE(PCM512x_AUTO_MUTE, PCM512x_ATMR_SHIFT, 7,
+			pcm512x_autom_text);
+
+static const char *pcm512x_ramp_rate_text[] = {
+	"1 sample/update", "2 samples/update", "4 samples/update",
+	"Immediate"
+};
+
+static const struct soc_enum pcm512x_vndf =
+	SOC_ENUM_SINGLE(PCM512x_DIGITAL_MUTE_1, PCM512x_VNDF_SHIFT, 4,
+			pcm512x_ramp_rate_text);
+
+static const struct soc_enum pcm512x_vnuf =
+	SOC_ENUM_SINGLE(PCM512x_DIGITAL_MUTE_1, PCM512x_VNUF_SHIFT, 4,
+			pcm512x_ramp_rate_text);
+
+static const struct soc_enum pcm512x_vedf =
+	SOC_ENUM_SINGLE(PCM512x_DIGITAL_MUTE_2, PCM512x_VEDF_SHIFT, 4,
+			pcm512x_ramp_rate_text);
+
+static const char *pcm512x_ramp_step_text[] = {
+	"4dB/step", "2dB/step", "1dB/step", "0.5dB/step"
+};
+
+static const struct soc_enum pcm512x_vnds =
+	SOC_ENUM_SINGLE(PCM512x_DIGITAL_MUTE_1, PCM512x_VNDS_SHIFT, 4,
+			pcm512x_ramp_step_text);
+
+static const struct soc_enum pcm512x_vnus =
+	SOC_ENUM_SINGLE(PCM512x_DIGITAL_MUTE_1, PCM512x_VNUS_SHIFT, 4,
+			pcm512x_ramp_step_text);
+
+static const struct soc_enum pcm512x_veds =
+	SOC_ENUM_SINGLE(PCM512x_DIGITAL_MUTE_2, PCM512x_VEDS_SHIFT, 4,
+			pcm512x_ramp_step_text);
+
+static const struct snd_kcontrol_new pcm512x_controls[] = {
+SOC_DOUBLE_R_TLV("Playback Digital Volume", PCM512x_DIGITAL_VOLUME_2,
+		 PCM512x_DIGITAL_VOLUME_3, 0, 255, 1, digital_tlv),
+SOC_DOUBLE("Playback Digital Switch", PCM512x_MUTE, PCM512x_RQML_SHIFT,
+	   PCM512x_RQMR_SHIFT, 1, 1),
+
+SOC_SINGLE("Deemphasis Switch", PCM512x_DSP, PCM512x_DEMP_SHIFT, 1, 1),
+SOC_VALUE_ENUM("DSP Program", pcm512x_dsp_program),
+
+SOC_ENUM("Clock Missing Period", pcm512x_clk_missing),
+SOC_ENUM("Auto Mute Time Left", pcm512x_autom_l),
+SOC_ENUM("Auto Mute Time Right", pcm512x_autom_r),
+SOC_SINGLE("Auto Mute Mono Switch", PCM512x_DIGITAL_MUTE_3,
+	   PCM512x_ACTL_SHIFT, 1, 0),
+SOC_DOUBLE("Auto Mute Switch", PCM512x_DIGITAL_MUTE_3, PCM512x_AMLE_SHIFT,
+	   PCM512x_AMLR_SHIFT, 1, 0),
+
+SOC_ENUM("Volume Ramp Down Rate", pcm512x_vndf),
+SOC_ENUM("Volume Ramp Down Step", pcm512x_vnds),
+SOC_ENUM("Volume Ramp Up Rate", pcm512x_vnuf),
+SOC_ENUM("Volume Ramp Up Step", pcm512x_vnus),
+SOC_ENUM("Volume Ramp Down Emergency Rate", pcm512x_vedf),
+SOC_ENUM("Volume Ramp Down Emergency Step", pcm512x_veds),
+};
+
+static const struct snd_soc_dapm_widget pcm512x_dapm_widgets[] = {
+SND_SOC_DAPM_DAC("DACL", NULL, SND_SOC_NOPM, 0, 0),
+SND_SOC_DAPM_DAC("DACR", NULL, SND_SOC_NOPM, 0, 0),
+
+SND_SOC_DAPM_OUTPUT("OUTL"),
+SND_SOC_DAPM_OUTPUT("OUTR"),
+};
+
+static const struct snd_soc_dapm_route pcm512x_dapm_routes[] = {
+	{ "DACL", NULL, "Playback" },
+	{ "DACR", NULL, "Playback" },
+
+	{ "OUTL", NULL, "DACL" },
+	{ "OUTR", NULL, "DACR" },
+};
+
+static int pcm512x_set_bias_level(struct snd_soc_codec *codec,
+				  enum snd_soc_bias_level level)
+{
+	struct pcm512x_priv *pcm512x = dev_get_drvdata(codec->dev);
+	int ret;
+
+	switch (level) {
+	case SND_SOC_BIAS_ON:
+	case SND_SOC_BIAS_PREPARE:
+		break;
+
+	case SND_SOC_BIAS_STANDBY:
+		ret = regmap_update_bits(pcm512x->regmap, PCM512x_POWER,
+					 PCM512x_RQST, 0);
+		if (ret != 0) {
+			dev_err(codec->dev, "Failed to remove standby: %d\n",
+				ret);
+			return ret;
+		}
+		break;
+
+	case SND_SOC_BIAS_OFF:
+		ret = regmap_update_bits(pcm512x->regmap, PCM512x_POWER,
+					 PCM512x_RQST, PCM512x_RQST);
+		if (ret != 0) {
+			dev_err(codec->dev, "Failed to request standby: %d\n",
+				ret);
+			return ret;
+		}
+		break;
+	}
+
+	codec->dapm.bias_level = level;
+
+	return 0;
+}
+
+static struct snd_soc_dai_driver pcm512x_dai = {
+	.name = "pcm512x-hifi",
+	.playback = {
+		.stream_name = "Playback",
+		.channels_min = 2,
+		.channels_max = 2,
+		.rates = SNDRV_PCM_RATE_8000_192000,
+		.formats = SNDRV_PCM_FMTBIT_S16_LE |
+			   SNDRV_PCM_FMTBIT_S24_LE |
+			   SNDRV_PCM_FMTBIT_S32_LE
+	},
+};
+
+static struct snd_soc_codec_driver pcm512x_codec_driver = {
+	.set_bias_level = pcm512x_set_bias_level,
+	.idle_bias_off = true,
+
+	.controls = pcm512x_controls,
+	.num_controls = ARRAY_SIZE(pcm512x_controls),
+	.dapm_widgets = pcm512x_dapm_widgets,
+	.num_dapm_widgets = ARRAY_SIZE(pcm512x_dapm_widgets),
+	.dapm_routes = pcm512x_dapm_routes,
+	.num_dapm_routes = ARRAY_SIZE(pcm512x_dapm_routes),
+};
+
+static const struct regmap_config pcm512x_regmap = {
+	.reg_bits = 8,
+	.val_bits = 8,
+
+	.readable_reg = pcm512x_readable,
+	.volatile_reg = pcm512x_volatile,
+
+	.max_register = PCM512x_MAX_REGISTER,
+	.reg_defaults = pcm512x_reg_defaults,
+	.num_reg_defaults = ARRAY_SIZE(pcm512x_reg_defaults),
+	.cache_type = REGCACHE_RBTREE,
+};
+
+static const struct of_device_id pcm512x_of_match[] = {
+	{ .compatible = "ti,pcm5121", },
+	{ .compatible = "ti,pcm5122", },
+	{ }
+};
+MODULE_DEVICE_TABLE(of, pcm512x_of_match);
+
+static int pcm512x_probe(struct device *dev, struct regmap *regmap)
+{
+	struct pcm512x_priv *pcm512x;
+	int i, ret;
+
+	pcm512x = devm_kzalloc(dev, sizeof(struct pcm512x_priv), GFP_KERNEL);
+	if (!pcm512x)
+		return -ENOMEM;
+
+	dev_set_drvdata(dev, pcm512x);
+	pcm512x->regmap = regmap;
+
+	for (i = 0; i < ARRAY_SIZE(pcm512x->supplies); i++)
+		pcm512x->supplies[i].supply = pcm512x_supply_names[i];
+
+	ret = devm_regulator_bulk_get(dev, ARRAY_SIZE(pcm512x->supplies),
+				      pcm512x->supplies);
+	if (ret != 0) {
+		dev_err(dev, "Failed to get supplies: %d\n", ret);
+		return ret;
+	}
+
+	pcm512x->supply_nb[0].notifier_call = pcm512x_regulator_event_0;
+	pcm512x->supply_nb[1].notifier_call = pcm512x_regulator_event_1;
+	pcm512x->supply_nb[2].notifier_call = pcm512x_regulator_event_2;
+
+	for (i = 0; i < ARRAY_SIZE(pcm512x->supplies); i++) {
+		ret = regulator_register_notifier(pcm512x->supplies[i].consumer,
+						  &pcm512x->supply_nb[i]);
+		if (ret != 0) {
+			dev_err(dev,
+				"Failed to register regulator notifier: %d\n",
+				ret);
+		}
+	}
+
+	ret = regulator_bulk_enable(ARRAY_SIZE(pcm512x->supplies),
+				    pcm512x->supplies);
+	if (ret != 0) {
+		dev_err(dev, "Failed to enable supplies: %d\n", ret);
+		return ret;
+	}
+
+	/* Reset the device, verifying I/O in the process for I2C */
+	ret = regmap_write(regmap, PCM512x_RESET,
+			   PCM512x_RSTM | PCM512x_RSTR);
+	if (ret != 0) {
+		dev_err(dev, "Failed to reset device: %d\n", ret);
+		goto err;
+	}
+
+	ret = regmap_write(regmap, PCM512x_RESET, 0);
+	if (ret != 0) {
+		dev_err(dev, "Failed to reset device: %d\n", ret);
+		goto err;
+	}
+
+	pcm512x->sclk = devm_clk_get(dev, NULL);
+	if (IS_ERR(pcm512x->sclk)) {
+		if (PTR_ERR(pcm512x->sclk) == -EPROBE_DEFER)
+			return -EPROBE_DEFER;
+
+		dev_info(dev, "No SCLK, using BCLK: %ld\n",
+			 PTR_ERR(pcm512x->sclk));
+
+		/* Disable reporting of missing SCLK as an error */
+		regmap_update_bits(regmap, PCM512x_ERROR_DETECT,
+				   PCM512x_IDCH, PCM512x_IDCH);
+
+		/* Switch PLL input to BCLK */
+		regmap_update_bits(regmap, PCM512x_PLL_REF,
+				   PCM512x_SREF, PCM512x_SREF);
+	} else {
+		ret = clk_prepare_enable(pcm512x->sclk);
+		if (ret != 0) {
+			dev_err(dev, "Failed to enable SCLK: %d\n", ret);
+			return ret;
+		}
+	}
+
+	/* Default to standby mode */
+	ret = regmap_update_bits(pcm512x->regmap, PCM512x_POWER,
+				 PCM512x_RQST, PCM512x_RQST);
+	if (ret != 0) {
+		dev_err(dev, "Failed to request standby: %d\n",
+			ret);
+		goto err_clk;
+	}
+
+	pm_runtime_set_active(dev);
+	pm_runtime_enable(dev);
+	pm_runtime_idle(dev);
+
+	ret = snd_soc_register_codec(dev, &pcm512x_codec_driver,
+				    &pcm512x_dai, 1);
+	if (ret != 0) {
+		dev_err(dev, "Failed to register CODEC: %d\n", ret);
+		goto err_pm;
+	}
+
+	dev_info(dev, "Completed initialisation - pcm512x_probe");
+
+	return 0;
+
+err_pm:
+	pm_runtime_disable(dev);
+err_clk:
+	if (!IS_ERR(pcm512x->sclk))
+		clk_disable_unprepare(pcm512x->sclk);
+err:
+	regulator_bulk_disable(ARRAY_SIZE(pcm512x->supplies),
+				     pcm512x->supplies);
+	return ret;
+}
+
+static void pcm512x_remove(struct device *dev)
+{
+	struct pcm512x_priv *pcm512x = dev_get_drvdata(dev);
+
+	snd_soc_unregister_codec(dev);
+	pm_runtime_disable(dev);
+	if (!IS_ERR(pcm512x->sclk))
+		clk_disable_unprepare(pcm512x->sclk);
+	regulator_bulk_disable(ARRAY_SIZE(pcm512x->supplies),
+			       pcm512x->supplies);
+}
+
+/* TODO
+static int pcm512x_suspend(struct device *dev)
+{
+	struct pcm512x_priv *pcm512x = dev_get_drvdata(dev);
+	int ret;
+
+	ret = regmap_update_bits(pcm512x->regmap, PCM512x_POWER,
+				 PCM512x_RQPD, PCM512x_RQPD);
+	if (ret != 0) {
+		dev_err(dev, "Failed to request power down: %d\n", ret);
+		return ret;
+	}
+
+	ret = regulator_bulk_disable(ARRAY_SIZE(pcm512x->supplies),
+				     pcm512x->supplies);
+	if (ret != 0) {
+		dev_err(dev, "Failed to disable supplies: %d\n", ret);
+		return ret;
+	}
+
+	if (!IS_ERR(pcm512x->sclk))
+		clk_disable_unprepare(pcm512x->sclk);
+
+	return 0;
+}
+
+static int pcm512x_resume(struct device *dev)
+{
+	struct pcm512x_priv *pcm512x = dev_get_drvdata(dev);
+	int ret;
+
+	if (!IS_ERR(pcm512x->sclk)) {
+		ret = clk_prepare_enable(pcm512x->sclk);
+		if (ret != 0) {
+			dev_err(dev, "Failed to enable SCLK: %d\n", ret);
+			return ret;
+		}
+	}
+
+	ret = regulator_bulk_enable(ARRAY_SIZE(pcm512x->supplies),
+				    pcm512x->supplies);
+	if (ret != 0) {
+		dev_err(dev, "Failed to enable supplies: %d\n", ret);
+		return ret;
+	}
+
+	regcache_cache_only(pcm512x->regmap, false);
+	ret = regcache_sync(pcm512x->regmap);
+	if (ret != 0) {
+		dev_err(dev, "Failed to sync cache: %d\n", ret);
+		return ret;
+	}
+
+	ret = regmap_update_bits(pcm512x->regmap, PCM512x_POWER,
+				 PCM512x_RQPD, 0);
+	if (ret != 0) {
+		dev_err(dev, "Failed to remove power down: %d\n", ret);
+		return ret;
+	}
+
+	return 0;
+}
+
+// END OF PCM512x_suspend and resume calls TODO
+*/
+
+static const struct dev_pm_ops pcm512x_pm_ops = {
+	SET_RUNTIME_PM_OPS(pcm512x_suspend, pcm512x_resume, NULL)
+};
+
+#if IS_ENABLED(CONFIG_I2C)
+static int pcm512x_i2c_probe(struct i2c_client *i2c,
+			     const struct i2c_device_id *id)
+{
+	struct regmap *regmap;
+
+	regmap = devm_regmap_init_i2c(i2c, &pcm512x_regmap);
+	if (IS_ERR(regmap))
+		return PTR_ERR(regmap);
+
+	return pcm512x_probe(&i2c->dev, regmap);
+}
+
+static int pcm512x_i2c_remove(struct i2c_client *i2c)
+{
+	pcm512x_remove(&i2c->dev);
+	return 0;
+}
+
+static const struct i2c_device_id pcm512x_i2c_id[] = {
+	{ "pcm5121", },
+	{ "pcm5122", },
+	{ }
+};
+MODULE_DEVICE_TABLE(i2c, pcm512x_i2c_id);
+
+static struct i2c_driver pcm512x_i2c_driver = {
+	.probe 		= pcm512x_i2c_probe,
+	.remove 	= pcm512x_i2c_remove,
+	.id_table	= pcm512x_i2c_id,
+	.driver		= {
+		.name	= "pcm512x",
+		.owner	= THIS_MODULE,
+		.of_match_table = pcm512x_of_match,
+		.pm     = &pcm512x_pm_ops,
+	},
+};
+#endif
+
+#if defined(CONFIG_SPI_MASTER)
+static int pcm512x_spi_probe(struct spi_device *spi)
+{
+	struct regmap *regmap;
+	int ret;
+
+	regmap = devm_regmap_init_spi(spi, &pcm512x_regmap);
+	if (IS_ERR(regmap)) {
+		ret = PTR_ERR(regmap);
+		return ret;
+	}
+
+	return pcm512x_probe(&spi->dev, regmap);
+}
+
+static int pcm512x_spi_remove(struct spi_device *spi)
+{
+	pcm512x_remove(&spi->dev);
+	return 0;
+}
+
+static const struct spi_device_id pcm512x_spi_id[] = {
+	{ "pcm5121", },
+	{ "pcm5122", },
+	{ },
+};
+MODULE_DEVICE_TABLE(spi, pcm512x_spi_id);
+
+static struct spi_driver pcm512x_spi_driver = {
+	.probe		= pcm512x_spi_probe,
+	.remove		= pcm512x_spi_remove,
+	.id_table	= pcm512x_spi_id,
+	.driver = {
+		.name	= "pcm512x",
+		.owner	= THIS_MODULE,
+		.of_match_table = pcm512x_of_match,
+		.pm     = &pcm512x_pm_ops,
+	},
+};
+#endif
+
+static int __init pcm512x_modinit(void)
+{
+	int ret = 0;
+
+#if IS_ENABLED(CONFIG_I2C)
+	ret = i2c_add_driver(&pcm512x_i2c_driver);
+	if (ret) {
+		printk(KERN_ERR "Failed to register pcm512x I2C driver: %d\n",
+		       ret);
+	}
+#endif
+#if defined(CONFIG_SPI_MASTER)
+	ret = spi_register_driver(&pcm512x_spi_driver);
+	if (ret != 0) {
+		printk(KERN_ERR "Failed to register pcm512x SPI driver: %d\n",
+		       ret);
+	}
+#endif
+	return ret;
+}
+module_init(pcm512x_modinit);
+
+static void __exit pcm512x_exit(void)
+{
+#if IS_ENABLED(CONFIG_I2C)
+	i2c_del_driver(&pcm512x_i2c_driver);
+#endif
+#if defined(CONFIG_SPI_MASTER)
+	spi_unregister_driver(&pcm512x_spi_driver);
+#endif
+}
+module_exit(pcm512x_exit);
+
+MODULE_DESCRIPTION("ASoC PCM512x codec driver");
+MODULE_AUTHOR("Mark Brown <broonie@linaro.org>");
+MODULE_LICENSE("GPL v2");
diff --git a/sound/soc/codecs/pcm512x.h b/sound/soc/codecs/pcm512x.h
new file mode 100644
index 0000000..b2f518e
--- /dev/null
+++ b/sound/soc/codecs/pcm512x.h
@@ -0,0 +1,142 @@
+/*
+ * Driver for the PCM512x CODECs
+ *
+ * Author:	Mark Brown <broonie@linaro.org>
+ *		Copyright 2014 Linaro Ltd
+ *
+ * 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.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ */
+
+#ifndef _SND_SOC_PCM512X
+#define _SND_SOC_PCM512X
+
+#define PCM512x_PAGE_0_BASE 0
+
+#define PCM512x_PAGE              0
+
+#define PCM512x_RESET             (PCM512x_PAGE_0_BASE +   1)
+#define PCM512x_POWER             (PCM512x_PAGE_0_BASE +   2)
+#define PCM512x_MUTE              (PCM512x_PAGE_0_BASE +   3)
+#define PCM512x_PLL_EN            (PCM512x_PAGE_0_BASE +   4)
+#define PCM512x_SPI_MISO_FUNCTION (PCM512x_PAGE_0_BASE +   6)
+#define PCM512x_DSP               (PCM512x_PAGE_0_BASE +   7)
+#define PCM512x_GPIO_EN           (PCM512x_PAGE_0_BASE +   8)
+#define PCM512x_BCLK_LRCLK_CFG    (PCM512x_PAGE_0_BASE +   9)
+#define PCM512x_DSP_GPIO_INPUT    (PCM512x_PAGE_0_BASE +  10)
+#define PCM512x_MASTER_MODE       (PCM512x_PAGE_0_BASE +  12)
+#define PCM512x_PLL_REF           (PCM512x_PAGE_0_BASE +  13)
+#define PCM512x_PLL_COEFF_0       (PCM512x_PAGE_0_BASE +  20)
+#define PCM512x_PLL_COEFF_1       (PCM512x_PAGE_0_BASE +  21)
+#define PCM512x_PLL_COEFF_2       (PCM512x_PAGE_0_BASE +  22)
+#define PCM512x_PLL_COEFF_3       (PCM512x_PAGE_0_BASE +  23)
+#define PCM512x_PLL_COEFF_4       (PCM512x_PAGE_0_BASE +  24)
+#define PCM512x_DSP_CLKDIV        (PCM512x_PAGE_0_BASE +  27)
+#define PCM512x_DAC_CLKDIV        (PCM512x_PAGE_0_BASE +  28)
+#define PCM512x_NCP_CLKDIV        (PCM512x_PAGE_0_BASE +  29)
+#define PCM512x_OSR_CLKDIV        (PCM512x_PAGE_0_BASE +  30)
+#define PCM512x_MASTER_CLKDIV_1   (PCM512x_PAGE_0_BASE +  32)
+#define PCM512x_MASTER_CLKDIV_2   (PCM512x_PAGE_0_BASE +  33)
+#define PCM512x_FS_SPEED_MODE     (PCM512x_PAGE_0_BASE +  34)
+#define PCM512x_IDAC_1            (PCM512x_PAGE_0_BASE +  35)
+#define PCM512x_IDAC_2            (PCM512x_PAGE_0_BASE +  36)
+#define PCM512x_ERROR_DETECT      (PCM512x_PAGE_0_BASE +  37)
+#define PCM512x_I2S_1             (PCM512x_PAGE_0_BASE +  40)
+#define PCM512x_I2S_2             (PCM512x_PAGE_0_BASE +  41)
+#define PCM512x_DAC_ROUTING       (PCM512x_PAGE_0_BASE +  42)
+#define PCM512x_DSP_PROGRAM       (PCM512x_PAGE_0_BASE +  43)
+#define PCM512x_CLKDET            (PCM512x_PAGE_0_BASE +  44)
+#define PCM512x_AUTO_MUTE         (PCM512x_PAGE_0_BASE +  59)
+#define PCM512x_DIGITAL_VOLUME_1  (PCM512x_PAGE_0_BASE +  60)
+#define PCM512x_DIGITAL_VOLUME_2  (PCM512x_PAGE_0_BASE +  61)
+#define PCM512x_DIGITAL_VOLUME_3  (PCM512x_PAGE_0_BASE +  62)
+#define PCM512x_DIGITAL_MUTE_1    (PCM512x_PAGE_0_BASE +  63)
+#define PCM512x_DIGITAL_MUTE_2    (PCM512x_PAGE_0_BASE +  64)
+#define PCM512x_DIGITAL_MUTE_3    (PCM512x_PAGE_0_BASE +  65)
+#define PCM512x_GPIO_OUTPUT_1     (PCM512x_PAGE_0_BASE +  80)
+#define PCM512x_GPIO_OUTPUT_2     (PCM512x_PAGE_0_BASE +  81)
+#define PCM512x_GPIO_OUTPUT_3     (PCM512x_PAGE_0_BASE +  82)
+#define PCM512x_GPIO_OUTPUT_4     (PCM512x_PAGE_0_BASE +  83)
+#define PCM512x_GPIO_OUTPUT_5     (PCM512x_PAGE_0_BASE +  84)
+#define PCM512x_GPIO_OUTPUT_6     (PCM512x_PAGE_0_BASE +  85)
+#define PCM512x_GPIO_CONTROL_1    (PCM512x_PAGE_0_BASE +  86)
+#define PCM512x_GPIO_CONTROL_2    (PCM512x_PAGE_0_BASE +  87)
+#define PCM512x_OVERFLOW          (PCM512x_PAGE_0_BASE +  90)
+#define PCM512x_RATE_DET_1        (PCM512x_PAGE_0_BASE +  91)
+#define PCM512x_RATE_DET_2        (PCM512x_PAGE_0_BASE +  92)
+#define PCM512x_RATE_DET_3        (PCM512x_PAGE_0_BASE +  93)
+#define PCM512x_RATE_DET_4        (PCM512x_PAGE_0_BASE +  94)
+#define PCM512x_ANALOG_MUTE_DET   (PCM512x_PAGE_0_BASE + 108)
+#define PCM512x_GPIN              (PCM512x_PAGE_0_BASE + 119)
+#define PCM512x_DIGITAL_MUTE_DET  (PCM512x_PAGE_0_BASE + 120)
+
+#define PCM512x_MAX_REGISTER      (PCM512x_PAGE_0_BASE + 120)
+
+/* Page 0, Register 1 - reset */
+#define PCM512x_RSTR (1 << 0)
+#define PCM512x_RSTM (1 << 4)
+
+/* Page 0, Register 2 - power */
+#define PCM512x_RQPD       (1 << 0)
+#define PCM512x_RQPD_SHIFT 0
+#define PCM512x_RQST       (1 << 4)
+#define PCM512x_RQST_SHIFT 4
+
+/* Page 0, Register 3 - mute */
+#define PCM512x_RQMR_SHIFT 0
+#define PCM512x_RQML_SHIFT 4
+
+/* Page 0, Register 4 - PLL */
+#define PCM512x_PLCE       (1 << 0)
+#define PCM512x_RLCE_SHIFT 0
+#define PCM512x_PLCK       (1 << 4)
+#define PCM512x_PLCK_SHIFT 4
+
+/* Page 0, Register 7 - DSP */
+#define PCM512x_SDSL       (1 << 0)
+#define PCM512x_SDSL_SHIFT 0
+#define PCM512x_DEMP       (1 << 4)
+#define PCM512x_DEMP_SHIFT 4
+
+/* Page 0, Register 13 - PLL reference */
+#define PCM512x_SREF (1 << 4)
+
+/* Page 0, Register 37 - Error detection */
+#define PCM512x_IPLK (1 << 0)
+#define PCM512x_DCAS (1 << 1)
+#define PCM512x_IDCM (1 << 2)
+#define PCM512x_IDCH (1 << 3)
+#define PCM512x_IDSK (1 << 4)
+#define PCM512x_IDBK (1 << 5)
+#define PCM512x_IDFS (1 << 6)
+
+/* Page 0, Register 42 - DAC routing */
+#define PCM512x_AUPR_SHIFT 0
+#define PCM512x_AUPL_SHIFT 4
+
+/* Page 0, Register 59 - auto mute */
+#define PCM512x_ATMR_SHIFT 0
+#define PCM512x_ATML_SHIFT 4
+
+/* Page 0, Register 63 - ramp rates */
+#define PCM512x_VNDF_SHIFT 6
+#define PCM512x_VNDS_SHIFT 4
+#define PCM512x_VNUF_SHIFT 2
+#define PCM512x_VNUS_SHIFT 0
+
+/* Page 0, Register 64 - emergency ramp rates */
+#define PCM512x_VEDF_SHIFT 6
+#define PCM512x_VEDS_SHIFT 4
+
+/* Page 0, Register 65 - Digital mute enables */
+#define PCM512x_ACTL_SHIFT 2
+#define PCM512x_AMLE_SHIFT 1
+#define PCM512x_AMLR_SHIFT 0
+
+#endif
-- 
1.9.1