ASoC: Add EQ and filter to max98095 CODEC driver

This patch adds the equalizer and biquad filter controls.
Signed-off-by: Peter Hsiang <peter.hsiang@maxim-ic.com>
Acked-by: Liam Girdwood <lrg@ti.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

include/sound/max98095.h

@@ -13,8 +13,36 @@
 #ifndef __SOUND_MAX98095_PDATA_H__
 #define __SOUND_MAX98095_PDATA_H__
 
+/* Equalizer filter response configuration */
+struct max98095_eq_cfg {
+	const char *name;
+	unsigned int rate;
+	u16 band1[5];
+	u16 band2[5];
+	u16 band3[5];
+	u16 band4[5];
+	u16 band5[5];
+};
+
+/* Biquad filter response configuration */
+struct max98095_biquad_cfg {
+	const char *name;
+	unsigned int rate;
+	u16 band1[5];
+	u16 band2[5];
+};
+
 /* codec platform data */
 struct max98095_pdata {
+
+	/* Equalizers for DAI1 and DAI2 */
+	struct max98095_eq_cfg *eq_cfg;
+	unsigned int eq_cfgcnt;
+
+	/* Biquad filter for DAI1 and DAI2 */
+	struct max98095_biquad_cfg *bq_cfg;
+	unsigned int bq_cfgcnt;
+
 	/* Analog/digital microphone configuration:
 	 * 0 = analog microphone input (normal setting)
 	 * 1 = digital microphone input

sound/soc/codecs/max98095.h

@@ -250,6 +250,8 @@
 /* M98095_088_CFG_LEVEL */
 	#define M98095_VSEN                     (1<<6)
 	#define M98095_ZDEN                     (1<<5)
+	#define M98095_BQ2EN                    (1<<3)
+	#define M98095_BQ1EN                    (1<<2)
 	#define M98095_EQ2EN                    (1<<1)
 	#define M98095_EQ1EN                    (1<<0)
 
@@ -281,4 +283,17 @@
 	#define M98095_PWRSV8K                  (1<<1)
 	#define M98095_PWRSV                    (1<<0)
 
+#define M98095_COEFS_PER_BAND            5
+
+#define M98095_BYTE1(w) ((w >> 8) & 0xff)
+#define M98095_BYTE0(w) (w & 0xff)
+
+/* Equalizer filter coefficients */
+#define M98095_110_DAI1_EQ_BASE             0x10
+#define M98095_142_DAI2_EQ_BASE             0x42
+
+/* Biquad filter coefficients */
+#define M98095_174_DAI1_BQ_BASE             0x74
+#define M98095_17E_DAI2_BQ_BASE             0x7E
+
 #endif