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Date: Wed, 13 Feb 2013 18:35:19 +0900
From: Chanwoo Choi <cw00.choi@...sung.com>
To: gregkh@...uxfoundation.org, sameo@...ux.intel.com
Cc: linux-kernel@...r.kernel.org, myungjoo.ham@...sung.com,
kyungmin.park@...sung.com, Chanwoo Choi <cw00.choi@...sung.com>
Subject: [PATCH 6/9] extcon: max8997: Set default of ADC debounce time during
initialization
This patch set default of ADC Debounce Time(25ms) during probe step.
Also, can possible change ADC Debounce Time according to H/W situation
by using max8997_set_adc_debounce_time()
Signed-off-by: Chanwoo Choi <cw00.choi@...sung.com>
Signed-off-by: Myungjoo Ham <myungjoo.ham@...sung.com>
---
drivers/extcon/extcon-max8997.c | 42 +++++++++++++++++++++++++++++++++++++
include/linux/mfd/max8997-private.h | 7 +++++++
2 files changed, 49 insertions(+)
diff --git a/drivers/extcon/extcon-max8997.c b/drivers/extcon/extcon-max8997.c
index 8739b50..3206daa 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);
diff --git a/include/linux/mfd/max8997-private.h b/include/linux/mfd/max8997-private.h
index 010173a..cd37a92 100644
--- a/include/linux/mfd/max8997-private.h
+++ b/include/linux/mfd/max8997-private.h
@@ -251,6 +251,13 @@ enum max8997_muic_reg {
#define CONTROL2_USBCPINT_MASK (0x1 << CONTROL2_USBCPINT_SHIFT)
#define CONTROL2_RCPS_MASK (0x1 << CONTROL2_RCPS_SHIFT)
+#define CONTROL3_JIGSET_SHIFT (0)
+#define CONTROL3_BTLDSET_SHIFT (2)
+#define CONTROL3_ADCDBSET_SHIFT (4)
+#define CONTROL3_JIGSET_MASK (0x3 << CONTROL3_JIGSET_SHIFT)
+#define CONTROL3_BTLDSET_MASK (0x3 << CONTROL3_BTLDSET_SHIFT)
+#define CONTROL3_ADCDBSET_MASK (0x3 << CONTROL3_ADCDBSET_SHIFT)
+
#define MAX8997_ADC_GROUND 0x00
#define MAX8997_ADC_MHL 0x01
#define MAX8997_ADC_JIG_USB_1 0x18
--
1.8.0
--
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