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| author | Chanwoo Choi <cw00.choi@samsung.com> | 2013-02-13 03:50:00 +0400 |
|---|---|---|
| committer | Chanwoo Choi <cw00.choi@samsung.com> | 2013-02-14 02:54:09 +0400 |
| commit | 027fcd50500fd87847891d5c2f341c1f002de3e8 (patch) | |
| tree | 32fd5d9c9ce5ccd99e3d43e524f8504af2dd6010 /drivers/extcon | |
| parent | 07c70503a420d48402b3859e2c1c4c847a130a8b (diff) | |
| download | linux-027fcd50500fd87847891d5c2f341c1f002de3e8.tar.xz | |
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@samsung.com>
Signed-off-by: Myungjoo Ham <myungjoo.ham@samsung.com>
Diffstat (limited to 'drivers/extcon')
| -rw-r--r-- | drivers/extcon/extcon-max8997.c | 42 |
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); |