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Subject[PATCH] mfd: arizona: Provide platform data for MICBIAS configuration
Date
Allow the MICBIAS voltages and other attributes to be configured by the
platform.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
---
drivers/mfd/arizona-core.c | 23 +++++++++++++++++++++++
include/linux/mfd/arizona/pdata.h | 12 ++++++++++++
2 files changed, 35 insertions(+)

diff --git a/drivers/mfd/arizona-core.c b/drivers/mfd/arizona-core.c
index 0bb79c8..06d245a 100644
--- a/drivers/mfd/arizona-core.c
+++ b/drivers/mfd/arizona-core.c
@@ -518,6 +518,29 @@ int arizona_dev_init(struct arizona *arizona)
goto err_reset;
}

+ for (i = 0; i < ARIZONA_MAX_MICBIAS; i++) {
+ if (!arizona->pdata.micbias[i].mV)
+ continue;
+
+ val = (arizona->pdata.micbias[i].mV - 1500) / 100;
+ val <<= ARIZONA_MICB1_LVL_SHIFT;
+
+ if (arizona->pdata.micbias[i].ext_cap)
+ val |= ARIZONA_MICB1_EXT_CAP;
+
+ if (arizona->pdata.micbias[i].discharge)
+ val |= ARIZONA_MICB1_DISCH;
+
+ if (arizona->pdata.micbias[i].fast_start)
+ val |= ARIZONA_MICB1_RATE;
+
+ regmap_update_bits(arizona->regmap,
+ ARIZONA_MIC_BIAS_CTRL_1 + i,
+ ARIZONA_MICB1_LVL_MASK |
+ ARIZONA_MICB1_DISCH |
+ ARIZONA_MICB1_RATE, val);
+ }
+
for (i = 0; i < ARIZONA_MAX_INPUT; i++) {
/* Default for both is 0 so noop with defaults */
val = arizona->pdata.dmic_ref[i]
diff --git a/include/linux/mfd/arizona/pdata.h b/include/linux/mfd/arizona/pdata.h
index 73822bd..32992a6 100644
--- a/include/linux/mfd/arizona/pdata.h
+++ b/include/linux/mfd/arizona/pdata.h
@@ -56,6 +56,8 @@
#define ARIZONA_DMIC_MICBIAS2 2
#define ARIZONA_DMIC_MICBIAS3 3

+#define ARIZONA_MAX_MICBIAS 3
+
#define ARIZONA_INMODE_DIFF 0
#define ARIZONA_INMODE_SE 1
#define ARIZONA_INMODE_DMIC 2
@@ -71,6 +73,13 @@

struct regulator_init_data;

+struct arizona_micbias {
+ int mV; /** Regulated voltage */
+ unsigned int ext_cap:1; /** External capacitor fitted */
+ unsigned int discharge:1; /** Actively discharge */
+ unsigned int fast_start:1; /** Enable aggressive startup ramp rate */
+};
+
struct arizona_micd_config {
unsigned int src;
unsigned int bias;
@@ -111,6 +120,9 @@ struct arizona_pdata {
/** Reference voltage for DMIC inputs */
int dmic_ref[ARIZONA_MAX_INPUT];

+ /** MICBIAS configurations */
+ struct arizona_micbias micbias[ARIZONA_MAX_MICBIAS];
+
/** Mode of input structures */
int inmode[ARIZONA_MAX_INPUT];

--
1.7.10.4


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