[PATCH v3 1/7] extcon: arizona: Add defines for microphone detection levels

Charles Keepax
2013-11-14T16:34:15Z

Improve readability by creating a define for each microphone detection
level.

Acked-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Charles Keepax <ckeepax@opensource.wolfsonmicro.com>
---
drivers/extcon/extcon-arizona.c | 19 ++++++++++++++-----
include/linux/mfd/arizona/registers.h | 9 +++++++++
2 files changed, 23 insertions(+), 5 deletions(-)

diff --git a/drivers/extcon/extcon-arizona.c b/drivers/extcon/extcon-arizona.c
index ec9a14e..d611420 100644
--- a/drivers/extcon/extcon-arizona.c
+++ b/drivers/extcon/extcon-arizona.c
@@ -44,6 +44,15 @@
#define HPDET_DEBOUNCE 500
#define DEFAULT_MICD_TIMEOUT 2000

+#define MICD_LVL_1_TO_7 (ARIZONA_MICD_LVL_1 | ARIZONA_MICD_LVL_2 | \
+ ARIZONA_MICD_LVL_3 | ARIZONA_MICD_LVL_4 | \
+ ARIZONA_MICD_LVL_5 | ARIZONA_MICD_LVL_6 | \
+ ARIZONA_MICD_LVL_7)
+
+#define MICD_LVL_0_TO_7 (ARIZONA_MICD_LVL_0 | MICD_LVL_1_TO_7)
+
+#define MICD_LVL_0_TO_8 (MICD_LVL_0_TO_7 | ARIZONA_MICD_LVL_8)
+
struct arizona_extcon_info {
struct device *dev;
struct arizona *arizona;
@@ -767,7 +776,7 @@ static void arizona_micd_detect(struct work_struct *work)

mutex_lock(&info->lock);

- for (i = 0; i < 10 && !(val & 0x7fc); i++) {
+ for (i = 0; i < 10 && !(val & MICD_LVL_0_TO_8); i++) {
ret = regmap_read(arizona->regmap, ARIZONA_MIC_DETECT_3, &val);
if (ret != 0) {
dev_err(arizona->dev, "Failed to read MICDET: %d\n", ret);
@@ -784,7 +793,7 @@ static void arizona_micd_detect(struct work_struct *work)
}
}

- if (i == 10 && !(val & 0x7fc)) {
+ if (i == 10 && !(val & MICD_LVL_0_TO_8)) {
dev_err(arizona->dev, "Failed to get valid MICDET value\n");
mutex_unlock(&info->lock);
return;
@@ -798,7 +807,7 @@ static void arizona_micd_detect(struct work_struct *work)
}

/* If we got a high impedence we should have a headset, report it. */
- if (info->detecting && (val & 0x400)) {
+ if (info->detecting && (val & ARIZONA_MICD_LVL_8)) {
arizona_identify_headphone(info);

ret = extcon_update_state(&info->edev,
@@ -827,7 +836,7 @@ static void arizona_micd_detect(struct work_struct *work)
* plain headphones. If both polarities report a low
* impedence then give up and report headphones.
*/
- if (info->detecting && (val & 0x3f8)) {
+ if (info->detecting && (val & MICD_LVL_1_TO_7)) {
if (info->jack_flips >= info->micd_num_modes * 10) {
dev_dbg(arizona->dev, "Detected HP/line\n");
arizona_identify_headphone(info);
@@ -851,7 +860,7 @@ static void arizona_micd_detect(struct work_struct *work)
* If we're still detecting and we detect a short then we've
* got a headphone. Otherwise it's a button press.
*/
- if (val & 0x3fc) {
+ if (val & MICD_LVL_0_TO_7) {
if (info->mic) {
dev_dbg(arizona->dev, "Mic button detected\n");

diff --git a/include/linux/mfd/arizona/registers.h b/include/linux/mfd/arizona/registers.h
index 4706d3d..10d9e70 100644
--- a/include/linux/mfd/arizona/registers.h
+++ b/include/linux/mfd/arizona/registers.h
@@ -2196,6 +2196,15 @@
/*
* R677 (0x2A5) - Mic Detect 3
*/
+#define ARIZONA_MICD_LVL_0 0x0004 /* MICD_LVL - [2] */
+#define ARIZONA_MICD_LVL_1 0x0008 /* MICD_LVL - [3] */
+#define ARIZONA_MICD_LVL_2 0x0010 /* MICD_LVL - [4] */
+#define ARIZONA_MICD_LVL_3 0x0020 /* MICD_LVL - [5] */
+#define ARIZONA_MICD_LVL_4 0x0040 /* MICD_LVL - [6] */
+#define ARIZONA_MICD_LVL_5 0x0080 /* MICD_LVL - [7] */
+#define ARIZONA_MICD_LVL_6 0x0100 /* MICD_LVL - [8] */
+#define ARIZONA_MICD_LVL_7 0x0200 /* MICD_LVL - [9] */
+#define ARIZONA_MICD_LVL_8 0x0400 /* MICD_LVL - [10] */
#define ARIZONA_MICD_LVL_MASK 0x07FC /* MICD_LVL - [10:2] */
#define ARIZONA_MICD_LVL_SHIFT 2 /* MICD_LVL - [10:2] */
#define ARIZONA_MICD_LVL_WIDTH 9 /* MICD_LVL - [10:2] */
--
1.7.2.5