X-Git-Url: http://drtracing.org/?a=blobdiff_plain;f=sound%2Fsoc%2Fcodecs%2Fmax98090.c;h=78268f0514e95073e8b2006d4e2822a482fb6d3b;hb=2ca0a9d80c3a2cd3917b768080cce7f59b9bc490;hp=c2306268cab839e86e2ae587deef8b887331d97b;hpb=89a6192049050035cbd779d35686cbf29ca9184f;p=deliverable%2Flinux.git

diff --git a/sound/soc/codecs/max98090.c b/sound/soc/codecs/max98090.c
index c2306268cab8..78268f0514e9 100644
--- a/sound/soc/codecs/max98090.c
+++ b/sound/soc/codecs/max98090.c
@@ -27,7 +27,7 @@
 #include "max98090.h"
 
 /* Allows for sparsely populated register maps */
-static struct reg_default max98090_reg[] = {
+static const struct reg_default max98090_reg[] = {
 	{ 0x00, 0x00 }, /* 00 Software Reset */
 	{ 0x03, 0x04 }, /* 03 Interrupt Masks */
 	{ 0x04, 0x00 }, /* 04 System Clock Quick */
@@ -2419,6 +2419,8 @@ static int max98090_probe(struct snd_soc_codec *codec)
 	struct max98090_cdata *cdata;
 	enum max98090_type devtype;
 	int ret = 0;
+	int err;
+	unsigned int micbias;
 
 	dev_dbg(codec->dev, "max98090_probe\n");
 
@@ -2503,8 +2505,17 @@ static int max98090_probe(struct snd_soc_codec *codec)
 	snd_soc_write(codec, M98090_REG_BIAS_CONTROL,
 		M98090_VCM_MODE_MASK);
 
+	err = device_property_read_u32(codec->dev, "maxim,micbias", &micbias);
+	if (err) {
+		micbias = M98090_MBVSEL_2V8;
+		dev_info(codec->dev, "use default 2.8v micbias\n");
+	} else if (micbias < M98090_MBVSEL_2V2 || micbias > M98090_MBVSEL_2V8) {
+		dev_err(codec->dev, "micbias out of range 0x%x\n", micbias);
+		micbias = M98090_MBVSEL_2V8;
+	}
+
 	snd_soc_update_bits(codec, M98090_REG_MIC_BIAS_VOLTAGE,
-		M98090_MBVSEL_MASK, M98090_MBVSEL_2V8);
+		M98090_MBVSEL_MASK, micbias);
 
 	max98090_add_widgets(codec);
 
@@ -2693,7 +2704,7 @@ static const struct of_device_id max98090_of_match[] = {
 MODULE_DEVICE_TABLE(of, max98090_of_match);
 
 #ifdef CONFIG_ACPI
-static struct acpi_device_id max98090_acpi_match[] = {
+static const struct acpi_device_id max98090_acpi_match[] = {
 	{ "193C9890", MAX98090 },
 	{ }
 };