pinctrl: pinconf-generic: Add properties 'skew-delay-{in,out}put-ps'

Add the properties 'skew-delay-input-ps' and 'skew-delay-output-ps'
to the generic parameters used for parsing DT files. This allows to
specify the independent skew delay value for the two directions.
This enables drivers that use the generic pin configuration to get
the value passed through these new properties.

Signed-off-by: Antonio Borneo <antonio.borneo@foss.st.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

diff --git a/drivers/pinctrl/pinconf-generic.c b/drivers/pinctrl/pinconf-generic.c
index 72906d71ae1a2ebba0e6d6da6fdfc505370d2673..366775841c639966ad345f0c20c9d761741a16b8 100644 (file)
--- a/drivers/pinctrl/pinconf-generic.c
+++ b/drivers/pinctrl/pinconf-generic.c
@@ -54,6 +54,8 @@ static const struct pin_config_item conf_items[] = {
        PCONFDUMP(PIN_CONFIG_SLEEP_HARDWARE_STATE, "sleep hardware state", NULL, false),
        PCONFDUMP(PIN_CONFIG_SLEW_RATE, "slew rate", NULL, true),
        PCONFDUMP(PIN_CONFIG_SKEW_DELAY, "skew delay", NULL, true),
+       PCONFDUMP(PIN_CONFIG_SKEW_DELAY_INPUT_PS, "input skew delay", "ps", true),
+       PCONFDUMP(PIN_CONFIG_SKEW_DELAY_OUTPUT_PS, "output skew delay", "ps", true),
 };
 
 static void pinconf_generic_dump_one(struct pinctrl_dev *pctldev,
@@ -198,6 +200,8 @@ static const struct pinconf_generic_params dt_params[] = {
        { "sleep-hardware-state", PIN_CONFIG_SLEEP_HARDWARE_STATE, 0 },
        { "slew-rate", PIN_CONFIG_SLEW_RATE, 0 },
        { "skew-delay", PIN_CONFIG_SKEW_DELAY, 0 },
+       { "skew-delay-input-ps", PIN_CONFIG_SKEW_DELAY_INPUT_PS, 0 },
+       { "skew-delay-output-ps", PIN_CONFIG_SKEW_DELAY_OUTPUT_PS, 0 },
 };
 
 /**

diff --git a/include/linux/pinctrl/pinconf-generic.h b/include/linux/pinctrl/pinconf-generic.h
index f82add5d3302debfa174953d553a1b690acf5fd3..1be4032071c23b6da9d891ce30b2a6b0d091c40c 100644 (file)
--- a/include/linux/pinctrl/pinconf-generic.h
+++ b/include/linux/pinctrl/pinconf-generic.h
@@ -112,6 +112,12 @@ struct pinctrl_map;
  *     or latch delay (on outputs) this parameter (in a custom format)
  *     specifies the clock skew or latch delay. It typically controls how
  *     many double inverters are put in front of the line.
+ * @PIN_CONFIG_SKEW_DELAY_INPUT_PS: if the pin has independent values for the
+ *     programmable skew rate (on inputs) and latch delay (on outputs), then
+ *     this parameter specifies the clock skew only. The argument is in ps.
+ * @PIN_CONFIG_SKEW_DELAY_OUPUT_PS: if the pin has independent values for the
+ *     programmable skew rate (on inputs) and latch delay (on outputs), then
+ *     this parameter specifies the latch delay only. The argument is in ps.
  * @PIN_CONFIG_SLEEP_HARDWARE_STATE: indicate this is sleep related state.
  * @PIN_CONFIG_SLEW_RATE: if the pin can select slew rate, the argument to
  *     this parameter (on a custom format) tells the driver which alternative
@@ -147,6 +153,8 @@ enum pin_config_param {
        PIN_CONFIG_PERSIST_STATE,
        PIN_CONFIG_POWER_SOURCE,
        PIN_CONFIG_SKEW_DELAY,
+       PIN_CONFIG_SKEW_DELAY_INPUT_PS,
+       PIN_CONFIG_SKEW_DELAY_OUTPUT_PS,
        PIN_CONFIG_SLEEP_HARDWARE_STATE,
        PIN_CONFIG_SLEW_RATE,
        PIN_CONFIG_END = 0x7F,