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| author | Cristina Ciocan <cristina.ciocan@intel.com> | 2016-04-01 14:00:07 +0300 |
|---|---|---|
| committer | Linus Walleij <linus.walleij@linaro.org> | 2016-04-04 16:14:28 +0200 |
| commit | 658b476c742fe379e7020309fd590a27b457a4c1 (patch) | |
| tree | de9ccae52ec69926c398e95b6ccfdfcbed49fe8c /drivers/pinctrl/intel | |
| parent | 71e6ca61e82667c5c0de4aa779a4438d6568262f (diff) | |
| download | linux-658b476c742fe379e7020309fd590a27b457a4c1.tar.gz linux-658b476c742fe379e7020309fd590a27b457a4c1.tar.bz2 linux-658b476c742fe379e7020309fd590a27b457a4c1.zip | |
pinctrl: baytrail: Add debounce configuration
Make debounce setting and getting functionality available when
configurating a certain pin.
Signed-off-by: Cristina Ciocan <cristina.ciocan@intel.com>
Acked-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Diffstat (limited to 'drivers/pinctrl/intel')
| -rw-r--r-- | drivers/pinctrl/intel/pinctrl-baytrail.c | 83 |
1 files changed, 81 insertions, 2 deletions
diff --git a/drivers/pinctrl/intel/pinctrl-baytrail.c b/drivers/pinctrl/intel/pinctrl-baytrail.c index b087b0030617..6dcf43ab9efe 100644 --- a/drivers/pinctrl/intel/pinctrl-baytrail.c +++ b/drivers/pinctrl/intel/pinctrl-baytrail.c @@ -38,6 +38,7 @@ #define BYT_VAL_REG 0x008 #define BYT_DFT_REG 0x00c #define BYT_INT_STAT_REG 0x800 +#define BYT_DEBOUNCE_REG 0x9d0 /* BYT_CONF0_REG register bits */ #define BYT_IODEN BIT(31) @@ -45,6 +46,7 @@ #define BYT_TRIG_NEG BIT(26) #define BYT_TRIG_POS BIT(25) #define BYT_TRIG_LVL BIT(24) +#define BYT_DEBOUNCE_EN BIT(20) #define BYT_PULL_STR_SHIFT 9 #define BYT_PULL_STR_MASK (3 << BYT_PULL_STR_SHIFT) #define BYT_PULL_STR_2K (0 << BYT_PULL_STR_SHIFT) @@ -69,6 +71,16 @@ BYT_PIN_MUX) #define BYT_VAL_RESTORE_MASK (BYT_DIR_MASK | BYT_LEVEL) +/* BYT_DEBOUNCE_REG bits */ +#define BYT_DEBOUNCE_PULSE_MASK 0x7 +#define BYT_DEBOUNCE_PULSE_375US 1 +#define BYT_DEBOUNCE_PULSE_750US 2 +#define BYT_DEBOUNCE_PULSE_1500US 3 +#define BYT_DEBOUNCE_PULSE_3MS 4 +#define BYT_DEBOUNCE_PULSE_6MS 5 +#define BYT_DEBOUNCE_PULSE_12MS 6 +#define BYT_DEBOUNCE_PULSE_24MS 7 + #define BYT_NGPIO_SCORE 102 #define BYT_NGPIO_NCORE 28 #define BYT_NGPIO_SUS 44 @@ -1078,7 +1090,7 @@ static int byt_pin_config_get(struct pinctrl_dev *pctl_dev, unsigned int offset, void __iomem *conf_reg = byt_gpio_reg(vg, offset, BYT_CONF0_REG); void __iomem *val_reg = byt_gpio_reg(vg, offset, BYT_VAL_REG); unsigned long flags; - u32 conf, pull, val; + u32 conf, pull, val, debounce; u16 arg = 0; raw_spin_lock_irqsave(&vg->lock, flags); @@ -1108,6 +1120,41 @@ static int byt_pin_config_get(struct pinctrl_dev *pctl_dev, unsigned int offset, byt_get_pull_strength(conf, &arg); break; + case PIN_CONFIG_INPUT_DEBOUNCE: + if (!(conf & BYT_DEBOUNCE_EN)) + return -EINVAL; + + raw_spin_lock_irqsave(&vg->lock, flags); + debounce = readl(byt_gpio_reg(vg, offset, BYT_DEBOUNCE_REG)); + raw_spin_unlock_irqrestore(&vg->lock, flags); + + switch (debounce & BYT_DEBOUNCE_PULSE_MASK) { + case BYT_DEBOUNCE_PULSE_375US: + arg = 375; + break; + case BYT_DEBOUNCE_PULSE_750US: + arg = 750; + break; + case BYT_DEBOUNCE_PULSE_1500US: + arg = 1500; + break; + case BYT_DEBOUNCE_PULSE_3MS: + arg = 3000; + break; + case BYT_DEBOUNCE_PULSE_6MS: + arg = 6000; + break; + case BYT_DEBOUNCE_PULSE_12MS: + arg = 12000; + break; + case BYT_DEBOUNCE_PULSE_24MS: + arg = 24000; + break; + default: + return -EINVAL; + } + + break; default: return -ENOTSUPP; } @@ -1127,7 +1174,7 @@ static int byt_pin_config_set(struct pinctrl_dev *pctl_dev, void __iomem *conf_reg = byt_gpio_reg(vg, offset, BYT_CONF0_REG); void __iomem *val_reg = byt_gpio_reg(vg, offset, BYT_VAL_REG); unsigned long flags; - u32 conf, val; + u32 conf, val, debounce; int i, ret = 0; raw_spin_lock_irqsave(&vg->lock, flags); @@ -1187,6 +1234,38 @@ static int byt_pin_config_set(struct pinctrl_dev *pctl_dev, ret = byt_set_pull_strength(&conf, arg); break; + case PIN_CONFIG_INPUT_DEBOUNCE: + debounce = readl(byt_gpio_reg(vg, offset, + BYT_DEBOUNCE_REG)); + conf &= ~BYT_DEBOUNCE_PULSE_MASK; + + switch (arg) { + case 375: + conf |= BYT_DEBOUNCE_PULSE_375US; + break; + case 750: + conf |= BYT_DEBOUNCE_PULSE_750US; + break; + case 1500: + conf |= BYT_DEBOUNCE_PULSE_1500US; + break; + case 3000: + conf |= BYT_DEBOUNCE_PULSE_3MS; + break; + case 6000: + conf |= BYT_DEBOUNCE_PULSE_6MS; + break; + case 12000: + conf |= BYT_DEBOUNCE_PULSE_12MS; + break; + case 24000: + conf |= BYT_DEBOUNCE_PULSE_24MS; + break; + default: + ret = -EINVAL; + } + + break; default: ret = -ENOTSUPP; } |