ASoC: Add WM8974 CODEC driver

The WM8974 is a low power, high quality mono CODEC designed for portable
applications such as digital still cameras or digital voice recorders.

This driver was originally written by Graeme Gregory and Liam Girdwood
and has since been maintained by myself with some updates contributed by
Brett Saunders and Javier Martin.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

1 files changed, 104 insertions, 0 deletions

diff --git a/sound/soc/codecs/wm8974.h b/sound/soc/codecs/wm8974.h
new file mode 100644
index 000000000000..0f5172e0f616
--- /dev/null
+++ b/sound/soc/codecs/wm8974.h
@@ -0,0 +1,104 @@
+/*
+ * wm8974.h  --  WM8974 Soc Audio driver
+ *
+ * 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.
+ */
+
+#ifndef _WM8974_H
+#define _WM8974_H
+
+/* WM8974 register space */
+
+#define WM8974_RESET            0x0
+#define WM8974_POWER1           0x1
+#define WM8974_POWER2           0x2
+#define WM8974_POWER3           0x3
+#define WM8974_IFACE            0x4
+#define WM8974_COMP                     0x5
+#define WM8974_CLOCK            0x6
+#define WM8974_ADD                      0x7
+#define WM8974_GPIO                     0x8
+#define WM8974_DAC                      0xa
+#define WM8974_DACVOL           0xb
+#define WM8974_ADC                      0xe
+#define WM8974_ADCVOL           0xf
+#define WM8974_EQ1                      0x12
+#define WM8974_EQ2                      0x13
+#define WM8974_EQ3                      0x14
+#define WM8974_EQ4                      0x15
+#define WM8974_EQ5                      0x16
+#define WM8974_DACLIM1          0x18
+#define WM8974_DACLIM2          0x19
+#define WM8974_NOTCH1           0x1b
+#define WM8974_NOTCH2           0x1c
+#define WM8974_NOTCH3           0x1d
+#define WM8974_NOTCH4           0x1e
+#define WM8974_ALC1                     0x20
+#define WM8974_ALC2                     0x21
+#define WM8974_ALC3                     0x22
+#define WM8974_NGATE            0x23
+#define WM8974_PLLN                     0x24
+#define WM8974_PLLK1            0x25
+#define WM8974_PLLK2            0x26
+#define WM8974_PLLK3            0x27
+#define WM8974_ATTEN            0x28
+#define WM8974_INPUT            0x2c
+#define WM8974_INPPGA           0x2d
+#define WM8974_ADCBOOST         0x2f
+#define WM8974_OUTPUT           0x31
+#define WM8974_SPKMIX           0x32
+#define WM8974_SPKVOL           0x36
+#define WM8974_MONOMIX          0x38
+
+#define WM8974_CACHEREGNUM      57
+
+/* Clock divider Id's */
+#define WM8974_OPCLKDIV         0
+#define WM8974_MCLKDIV          1
+#define WM8974_ADCCLK           2
+#define WM8974_DACCLK           3
+#define WM8974_BCLKDIV          4
+
+/* DAC clock dividers */
+#define WM8974_DACCLK_F2        (1 << 3)
+#define WM8974_DACCLK_F4        (0 << 3)
+
+/* ADC clock dividers */
+#define WM8974_ADCCLK_F2        (1 << 3)
+#define WM8974_ADCCLK_F4        (0 << 3)
+
+/* PLL Out dividers */
+#define WM8974_OPCLKDIV_1       (0 << 4)
+#define WM8974_OPCLKDIV_2       (1 << 4)
+#define WM8974_OPCLKDIV_3       (2 << 4)
+#define WM8974_OPCLKDIV_4       (3 << 4)
+
+/* BCLK clock dividers */
+#define WM8974_BCLKDIV_1        (0 << 2)
+#define WM8974_BCLKDIV_2        (1 << 2)
+#define WM8974_BCLKDIV_4        (2 << 2)
+#define WM8974_BCLKDIV_8        (3 << 2)
+#define WM8974_BCLKDIV_16       (4 << 2)
+#define WM8974_BCLKDIV_32       (5 << 2)
+
+/* MCLK clock dividers */
+#define WM8974_MCLKDIV_1        (0 << 5)
+#define WM8974_MCLKDIV_1_5      (1 << 5)
+#define WM8974_MCLKDIV_2        (2 << 5)
+#define WM8974_MCLKDIV_3        (3 << 5)
+#define WM8974_MCLKDIV_4        (4 << 5)
+#define WM8974_MCLKDIV_6        (5 << 5)
+#define WM8974_MCLKDIV_8        (6 << 5)
+#define WM8974_MCLKDIV_12       (7 << 5)
+
+
+struct wm8974_setup_data {
+        unsigned short i2c_address;
+};
+
+extern struct snd_soc_dai wm8974_dai;
+extern struct snd_soc_codec_device soc_codec_dev_wm8974;
+
+#endif