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-rw-r--r--drivers/extcon/extcon-max8997.c42
1 files changed, 42 insertions, 0 deletions
diff --git a/drivers/extcon/extcon-max8997.c b/drivers/extcon/extcon-max8997.c
index 8739b50c2b36..3206daaf8e08 100644
--- a/drivers/extcon/extcon-max8997.c
+++ b/drivers/extcon/extcon-max8997.c
@@ -30,6 +30,13 @@
#define DEV_NAME "max8997-muic"
+enum max8997_muic_adc_debounce_time {
+ ADC_DEBOUNCE_TIME_0_5MS = 0, /* 0.5ms */
+ ADC_DEBOUNCE_TIME_10MS, /* 10ms */
+ ADC_DEBOUNCE_TIME_25MS, /* 25ms */
+ ADC_DEBOUNCE_TIME_38_62MS, /* 38.62ms */
+};
+
struct max8997_muic_irq {
unsigned int irq;
const char *name;
@@ -95,6 +102,38 @@ static const char *max8997_extcon_cable[] = {
};
/*
+ * max8997_muic_set_debounce_time - Set the debounce time of ADC
+ * @info: the instance including private data of max8997 MUIC
+ * @time: the debounce time of ADC
+ */
+static int max8997_muic_set_debounce_time(struct max8997_muic_info *info,
+ enum max8997_muic_adc_debounce_time time)
+{
+ int ret;
+
+ switch (time) {
+ case ADC_DEBOUNCE_TIME_0_5MS:
+ case ADC_DEBOUNCE_TIME_10MS:
+ case ADC_DEBOUNCE_TIME_25MS:
+ case ADC_DEBOUNCE_TIME_38_62MS:
+ ret = max8997_update_reg(info->muic,
+ MAX8997_MUIC_REG_CONTROL3,
+ time << CONTROL3_ADCDBSET_SHIFT,
+ CONTROL3_ADCDBSET_MASK);
+ if (ret) {
+ dev_err(info->dev, "failed to set ADC debounce time\n");
+ return -EAGAIN;
+ }
+ break;
+ default:
+ dev_err(info->dev, "invalid ADC debounce time\n");
+ return -EINVAL;
+ }
+
+ return 0;
+};
+
+/*
* max8997_muic_set_path - Set hardware line according to attached cable
* @info: the instance including private data of max8997 MUIC
* @value: the path according to attached cable
@@ -507,6 +546,9 @@ static int max8997_muic_probe(struct platform_device *pdev)
}
}
+ /* Set ADC debounce time */
+ max8997_muic_set_debounce_time(info, ADC_DEBOUNCE_TIME_25MS);
+
/* Initial device detection */
max8997_muic_detect_dev(info);