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Code

pinctrl: baytrail: Add debounce configuration

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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>
This commit is contained in:
Cristina Ciocan 2016-04-01 14:00:07 +03:00 committed by Linus Walleij
parent 71e6ca61e8
commit 658b476c74
1 changed files with 81 additions and 2 deletions
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83
drivers/pinctrl/intel/pinctrl-baytrail.c
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@ -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);
@ -1107,6 +1119,41 @@ 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);
@ -1186,6 +1233,38 @@ static int byt_pin_config_set(struct pinctrl_dev *pctl_dev,
conf |= BYT_PULL_ASSIGN_UP;
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;