Add a new parameter to support deglitch filter configuration.
A deglitch filter works like a debounce filter but with a smaller
delay (nanoseconds).
Signed-off-by: Boris BREZILLON <b.brezillon@xxxxxxxxxxx>
---
.../bindings/pinctrl/pinctrl-bindings.txt | 1 +
drivers/pinctrl/pinconf-generic.c | 2 ++
include/linux/pinctrl/pinconf-generic.h | 5 +++++
3 files changed, 8 insertions(+)
diff --git a/Documentation/devicetree/bindings/pinctrl/pinctrl-bindings.txt b/Documentation/devicetree/bindings/pinctrl/pinctrl-bindings.txt
index 1958ca9..2f7613e 100644
--- a/Documentation/devicetree/bindings/pinctrl/pinctrl-bindings.txt
+++ b/Documentation/devicetree/bindings/pinctrl/pinctrl-bindings.txt
@@ -154,6 +154,7 @@ drive-strength - sink or source at most X mA
input-schmitt-enable - enable schmitt-trigger mode
input-schmitt-disable - disable schmitt-trigger mode
input-debounce - debounce mode with debound time X
+input-deglitch - deglitch mode
low-power-enable - enable low power mode
low-power-disable - disable low power mode
output-low - set the pin to output mode with low level
diff --git a/drivers/pinctrl/pinconf-generic.c b/drivers/pinctrl/pinconf-generic.c
index 2c62225..f14a386 100644
--- a/drivers/pinctrl/pinconf-generic.c
+++ b/drivers/pinctrl/pinconf-generic.c
@@ -51,6 +51,7 @@ static struct pin_config_item conf_items[] = {
PCONFDUMP(PIN_CONFIG_INPUT_SCHMITT_ENABLE, "input schmitt enabled", NULL),
PCONFDUMP(PIN_CONFIG_INPUT_SCHMITT, "input schmitt trigger", NULL),
PCONFDUMP(PIN_CONFIG_INPUT_DEBOUNCE, "input debounce", "usec"),
+ PCONFDUMP(PIN_CONFIG_INPUT_DEGLITCH, "input deglitch", NULL),
PCONFDUMP(PIN_CONFIG_POWER_SOURCE, "pin power source", "selector"),
PCONFDUMP(PIN_CONFIG_SLEW_RATE, "slew rate", NULL),
PCONFDUMP(PIN_CONFIG_LOW_POWER_MODE, "pin low power", "mode"),
@@ -163,6 +164,7 @@ static struct pinconf_generic_dt_params dt_params[] = {
{ "input-schmitt-enable", PIN_CONFIG_INPUT_SCHMITT_ENABLE, 1 },
{ "input-schmitt-disable", PIN_CONFIG_INPUT_SCHMITT_ENABLE, 0 },
{ "input-debounce", PIN_CONFIG_INPUT_DEBOUNCE, 0 },
+ { "input-deglitch", PIN_CONFIG_INPUT_DEGLITCH, 0 },
{ "low-power-enable", PIN_CONFIG_LOW_POWER_MODE, 1 },
{ "low-power-disable", PIN_CONFIG_LOW_POWER_MODE, 0 },
{ "output-low", PIN_CONFIG_OUTPUT, 0, },
diff --git a/include/linux/pinctrl/pinconf-generic.h b/include/linux/pinctrl/pinconf-generic.h
index fb90ef5..aa06535 100644
--- a/include/linux/pinctrl/pinconf-generic.h
+++ b/include/linux/pinctrl/pinconf-generic.h
@@ -72,6 +72,10 @@
* which means it will wait for signals to settle when reading inputs. The
* argument gives the debounce time in usecs. Setting the
* argument to zero turns debouncing off.
+ * @PIN_CONFIG_INPUT_DEGLITCH: this will configure the pin to deglitch mode,
+ * which means it will wait for signals to settle when reading inputs. The
+ * If the argument != 0, deglitch mode is enabled. If it's 0, deglitch
+ * mode is disabled.
* @PIN_CONFIG_POWER_SOURCE: if the pin can select between different power
* supplies, the argument to this parameter (on a custom format) tells
* the driver which alternative power source to use.
@@ -102,6 +106,7 @@ enum pin_config_param {
PIN_CONFIG_INPUT_SCHMITT_ENABLE,
PIN_CONFIG_INPUT_SCHMITT,
PIN_CONFIG_INPUT_DEBOUNCE,
+ PIN_CONFIG_INPUT_DEGLITCH,
PIN_CONFIG_POWER_SOURCE,
PIN_CONFIG_SLEW_RATE,
PIN_CONFIG_LOW_POWER_MODE,
--
1.7.9.5
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