rename routines to be clearer; fix wiznet arg types

29 files changed, 64 insertions, 64 deletions

diff --git a/shared-bindings/analogio/AnalogIn.c b/shared-bindings/analogio/AnalogIn.c
index 9d1312dd8..b4eeb2af1 100644
--- a/shared-bindings/analogio/AnalogIn.c
+++ b/shared-bindings/analogio/AnalogIn.c
@@ -63,7 +63,7 @@ STATIC mp_obj_t analogio_analogin_make_new(const mp_obj_type_t *type,
     mp_arg_check_num(n_args, kw_args, 1, 1, false);
 
     // 1st argument is the pin
-    const mcu_pin_obj_t *pin = validate_is_free_pin(args[0]);
+    const mcu_pin_obj_t *pin = validate_obj_is_free_pin(args[0]);
 
     analogio_analogin_obj_t *self = m_new_obj(analogio_analogin_obj_t);
     self->base.type = &analogio_analogin_type;
diff --git a/shared-bindings/analogio/AnalogOut.c b/shared-bindings/analogio/AnalogOut.c
index 2496f1784..89cf147b2 100644
--- a/shared-bindings/analogio/AnalogOut.c
+++ b/shared-bindings/analogio/AnalogOut.c
@@ -62,7 +62,7 @@ STATIC mp_obj_t analogio_analogout_make_new(const mp_obj_type_t *type, mp_uint_t
     // check arguments
     mp_arg_check_num(n_args, kw_args, 1, 1, false);
 
-    const mcu_pin_obj_t *pin = validate_is_free_pin(args[0]);
+    const mcu_pin_obj_t *pin = validate_obj_is_free_pin(args[0]);
 
     analogio_analogout_obj_t *self = m_new_obj(analogio_analogout_obj_t);
     self->base.type = &analogio_analogout_type;
diff --git a/shared-bindings/audiobusio/I2SOut.c b/shared-bindings/audiobusio/I2SOut.c
index 45f703795..cd662acb5 100644
--- a/shared-bindings/audiobusio/I2SOut.c
+++ b/shared-bindings/audiobusio/I2SOut.c
@@ -105,9 +105,9 @@ STATIC mp_obj_t audiobusio_i2sout_make_new(const mp_obj_type_t *type, size_t n_a
     mp_arg_val_t args[MP_ARRAY_SIZE(allowed_args)];
     mp_arg_parse_all(n_args, pos_args, kw_args, MP_ARRAY_SIZE(allowed_args), allowed_args, args);
 
-    const mcu_pin_obj_t *bit_clock = validate_is_free_pin(args[ARG_bit_clock].u_obj);
-    const mcu_pin_obj_t *word_select = validate_is_free_pin(args[ARG_word_select].u_obj);
-    const mcu_pin_obj_t *data = validate_is_free_pin(args[ARG_data].u_obj);
+    const mcu_pin_obj_t *bit_clock = validate_obj_is_free_pin(args[ARG_bit_clock].u_obj);
+    const mcu_pin_obj_t *word_select = validate_obj_is_free_pin(args[ARG_word_select].u_obj);
+    const mcu_pin_obj_t *data = validate_obj_is_free_pin(args[ARG_data].u_obj);
 
     audiobusio_i2sout_obj_t *self = m_new_obj_with_finaliser(audiobusio_i2sout_obj_t);
     self->base.type = &audiobusio_i2sout_type;
diff --git a/shared-bindings/audiobusio/PDMIn.c b/shared-bindings/audiobusio/PDMIn.c
index 65bc5a9d2..fce6cf7a2 100644
--- a/shared-bindings/audiobusio/PDMIn.c
+++ b/shared-bindings/audiobusio/PDMIn.c
@@ -104,8 +104,8 @@ STATIC mp_obj_t audiobusio_pdmin_make_new(const mp_obj_type_t *type, size_t n_ar
     mp_arg_val_t args[MP_ARRAY_SIZE(allowed_args)];
     mp_arg_parse_all(n_args, pos_args, kw_args, MP_ARRAY_SIZE(allowed_args), allowed_args, args);
 
-    const mcu_pin_obj_t *clock_pin = validate_is_free_pin(args[ARG_clock_pin].u_obj);
-    const mcu_pin_obj_t *data_pin = validate_is_free_pin(args[ARG_data_pin].u_obj);
+    const mcu_pin_obj_t *clock_pin = validate_obj_is_free_pin(args[ARG_clock_pin].u_obj);
+    const mcu_pin_obj_t *data_pin = validate_obj_is_free_pin(args[ARG_data_pin].u_obj);
 
     // create PDMIn object from the given pin
     audiobusio_pdmin_obj_t *self = m_new_obj(audiobusio_pdmin_obj_t);
diff --git a/shared-bindings/audioio/AudioOut.c b/shared-bindings/audioio/AudioOut.c
index 687db22d3..ea1efcdff 100644
--- a/shared-bindings/audioio/AudioOut.c
+++ b/shared-bindings/audioio/AudioOut.c
@@ -104,8 +104,8 @@ STATIC mp_obj_t audioio_audioout_make_new(const mp_obj_type_t *type, size_t n_ar
     mp_arg_val_t args[MP_ARRAY_SIZE(allowed_args)];
     mp_arg_parse_all(n_args, pos_args, kw_args, MP_ARRAY_SIZE(allowed_args), allowed_args, args);
 
-    const mcu_pin_obj_t *left_channel_pin = validate_is_free_pin(args[ARG_left_channel].u_obj);
-    const mcu_pin_obj_t *right_channel_pin = validate_is_free_pin_or_none(args[ARG_right_channel].u_obj);
+    const mcu_pin_obj_t *left_channel_pin = validate_obj_is_free_pin(args[ARG_left_channel].u_obj);
+    const mcu_pin_obj_t *right_channel_pin = validate_obj_is_free_pin_or_none(args[ARG_right_channel].u_obj);
 
     // create AudioOut object from the given pin
     audioio_audioout_obj_t *self = m_new_obj(audioio_audioout_obj_t);
diff --git a/shared-bindings/audiopwmio/PWMAudioOut.c b/shared-bindings/audiopwmio/PWMAudioOut.c
index ab1d9c9fc..9fa2b1578 100644
--- a/shared-bindings/audiopwmio/PWMAudioOut.c
+++ b/shared-bindings/audiopwmio/PWMAudioOut.c
@@ -107,8 +107,8 @@ STATIC mp_obj_t audiopwmio_pwmaudioout_make_new(const mp_obj_type_t *type, size_
     mp_arg_val_t args[MP_ARRAY_SIZE(allowed_args)];
     mp_arg_parse_all(n_args, pos_args, kw_args, MP_ARRAY_SIZE(allowed_args), allowed_args, args);
 
-    const mcu_pin_obj_t *left_channel_pin = validate_is_free_pin(args[ARG_left_channel].u_obj);
-    const mcu_pin_obj_t *right_channel_pin = validate_is_free_pin_or_none(args[ARG_right_channel].u_obj);
+    const mcu_pin_obj_t *left_channel_pin = validate_obj_is_free_pin(args[ARG_left_channel].u_obj);
+    const mcu_pin_obj_t *right_channel_pin = validate_obj_is_free_pin_or_none(args[ARG_right_channel].u_obj);
 
     // create AudioOut object from the given pin
     audiopwmio_pwmaudioout_obj_t *self = m_new_obj(audiopwmio_pwmaudioout_obj_t);
diff --git a/shared-bindings/bitbangio/I2C.c b/shared-bindings/bitbangio/I2C.c
index bdfbfb2ca..3c4f13777 100644
--- a/shared-bindings/bitbangio/I2C.c
+++ b/shared-bindings/bitbangio/I2C.c
@@ -64,8 +64,8 @@ STATIC mp_obj_t bitbangio_i2c_make_new(const mp_obj_type_t *type, size_t n_args,
     mp_arg_val_t args[MP_ARRAY_SIZE(allowed_args)];
     mp_arg_parse_all(n_args, pos_args, kw_args, MP_ARRAY_SIZE(allowed_args), allowed_args, args);
 
-    const mcu_pin_obj_t* scl = validate_is_free_pin(args[ARG_scl].u_obj);
-    const mcu_pin_obj_t* sda = validate_is_free_pin(args[ARG_sda].u_obj);
+    const mcu_pin_obj_t* scl = validate_obj_is_free_pin(args[ARG_scl].u_obj);
+    const mcu_pin_obj_t* sda = validate_obj_is_free_pin(args[ARG_sda].u_obj);
 
     bitbangio_i2c_obj_t *self = m_new_obj(bitbangio_i2c_obj_t);
     self->base.type = &bitbangio_i2c_type;
diff --git a/shared-bindings/bitbangio/OneWire.c b/shared-bindings/bitbangio/OneWire.c
index 20ca81c5d..95bbd0679 100644
--- a/shared-bindings/bitbangio/OneWire.c
+++ b/shared-bindings/bitbangio/OneWire.c
@@ -70,7 +70,7 @@ STATIC mp_obj_t bitbangio_onewire_make_new(const mp_obj_type_t *type, size_t n_a
     mp_arg_val_t args[MP_ARRAY_SIZE(allowed_args)];
     mp_arg_parse_all(n_args, pos_args, kw_args, MP_ARRAY_SIZE(allowed_args), allowed_args, args);
 
-    const mcu_pin_obj_t* pin = validate_is_free_pin(args[ARG_pin].u_obj);
+    const mcu_pin_obj_t* pin = validate_obj_is_free_pin(args[ARG_pin].u_obj);
 
     bitbangio_onewire_obj_t *self = m_new_obj(bitbangio_onewire_obj_t);
     self->base.type = &bitbangio_onewire_type;
diff --git a/shared-bindings/bitbangio/SPI.c b/shared-bindings/bitbangio/SPI.c
index 462352352..b1a94c184 100644
--- a/shared-bindings/bitbangio/SPI.c
+++ b/shared-bindings/bitbangio/SPI.c
@@ -72,9 +72,9 @@ STATIC mp_obj_t bitbangio_spi_make_new(const mp_obj_type_t *type, size_t n_args,
     mp_arg_val_t args[MP_ARRAY_SIZE(allowed_args)];
     mp_arg_parse_all(n_args, pos_args, kw_args, MP_ARRAY_SIZE(allowed_args), allowed_args, args);
 
-    const mcu_pin_obj_t* clock = validate_is_free_pin(args[ARG_clock].u_obj);
-    const mcu_pin_obj_t* mosi = validate_is_free_pin_or_none(args[ARG_MOSI].u_obj);
-    const mcu_pin_obj_t* miso = validate_is_free_pin_or_none(args[ARG_MISO].u_obj);
+    const mcu_pin_obj_t* clock = validate_obj_is_free_pin(args[ARG_clock].u_obj);
+    const mcu_pin_obj_t* mosi = validate_obj_is_free_pin_or_none(args[ARG_MOSI].u_obj);
+    const mcu_pin_obj_t* miso = validate_obj_is_free_pin_or_none(args[ARG_MISO].u_obj);
 
     bitbangio_spi_obj_t *self = m_new_obj(bitbangio_spi_obj_t);
     self->base.type = &bitbangio_spi_type;
diff --git a/shared-bindings/busio/I2C.c b/shared-bindings/busio/I2C.c
index 618a5ad32..c89215acd 100644
--- a/shared-bindings/busio/I2C.c
+++ b/shared-bindings/busio/I2C.c
@@ -77,8 +77,8 @@ STATIC mp_obj_t busio_i2c_make_new(const mp_obj_type_t *type, size_t n_args, con
     mp_arg_val_t args[MP_ARRAY_SIZE(allowed_args)];
     mp_arg_parse_all(n_args, pos_args, kw_args, MP_ARRAY_SIZE(allowed_args), allowed_args, args);
 
-    const mcu_pin_obj_t* scl = validate_is_free_pin(args[ARG_scl].u_obj);
-    const mcu_pin_obj_t* sda = validate_is_free_pin(args[ARG_sda].u_obj);
+    const mcu_pin_obj_t* scl = validate_obj_is_free_pin(args[ARG_scl].u_obj);
+    const mcu_pin_obj_t* sda = validate_obj_is_free_pin(args[ARG_sda].u_obj);
 
     common_hal_busio_i2c_construct(self, scl, sda, args[ARG_frequency].u_int, args[ARG_timeout].u_int);
     return (mp_obj_t)self;
diff --git a/shared-bindings/busio/OneWire.c b/shared-bindings/busio/OneWire.c
index b28495096..022d6afcf 100644
--- a/shared-bindings/busio/OneWire.c
+++ b/shared-bindings/busio/OneWire.c
@@ -69,7 +69,7 @@ STATIC mp_obj_t busio_onewire_make_new(const mp_obj_type_t *type, size_t n_args,
     };
     mp_arg_val_t args[MP_ARRAY_SIZE(allowed_args)];
     mp_arg_parse_all(n_args, pos_args, kw_args, MP_ARRAY_SIZE(allowed_args), allowed_args, args);
-    const mcu_pin_obj_t* pin = validate_is_free_pin(args[ARG_pin].u_obj);
+    const mcu_pin_obj_t* pin = validate_obj_is_free_pin(args[ARG_pin].u_obj);
 
     busio_onewire_obj_t *self = m_new_obj(busio_onewire_obj_t);
     self->base.type = &busio_onewire_type;
diff --git a/shared-bindings/busio/SPI.c b/shared-bindings/busio/SPI.c
index ca84c0f24..043c1089d 100644
--- a/shared-bindings/busio/SPI.c
+++ b/shared-bindings/busio/SPI.c
@@ -90,9 +90,9 @@ STATIC mp_obj_t busio_spi_make_new(const mp_obj_type_t *type, size_t n_args, con
     mp_arg_val_t args[MP_ARRAY_SIZE(allowed_args)];
     mp_arg_parse_all(n_args, pos_args, kw_args, MP_ARRAY_SIZE(allowed_args), allowed_args, args);
 
-    const mcu_pin_obj_t* clock = validate_is_free_pin(args[ARG_clock].u_obj);
-    const mcu_pin_obj_t* mosi = validate_is_free_pin_or_none(args[ARG_MOSI].u_obj);
-    const mcu_pin_obj_t* miso = validate_is_free_pin_or_none(args[ARG_MISO].u_obj);
+    const mcu_pin_obj_t* clock = validate_obj_is_free_pin(args[ARG_clock].u_obj);
+    const mcu_pin_obj_t* mosi = validate_obj_is_free_pin_or_none(args[ARG_MOSI].u_obj);
+    const mcu_pin_obj_t* miso = validate_obj_is_free_pin_or_none(args[ARG_MISO].u_obj);
 
     common_hal_busio_spi_construct(self, clock, mosi, miso);
     return MP_OBJ_FROM_PTR(self);
diff --git a/shared-bindings/busio/UART.c b/shared-bindings/busio/UART.c
index ffa50fd7d..f231924d5 100644
--- a/shared-bindings/busio/UART.c
+++ b/shared-bindings/busio/UART.c
@@ -105,8 +105,8 @@ STATIC mp_obj_t busio_uart_make_new(const mp_obj_type_t *type, size_t n_args, co
     mp_arg_val_t args[MP_ARRAY_SIZE(allowed_args)];
     mp_arg_parse_all(n_args, pos_args, kw_args, MP_ARRAY_SIZE(allowed_args), allowed_args, args);
 
-    const mcu_pin_obj_t* rx = validate_is_free_pin_or_none(args[ARG_rx].u_obj);
-    const mcu_pin_obj_t* tx = validate_is_free_pin_or_none(args[ARG_tx].u_obj);
+    const mcu_pin_obj_t* rx = validate_obj_is_free_pin_or_none(args[ARG_rx].u_obj);
+    const mcu_pin_obj_t* tx = validate_obj_is_free_pin_or_none(args[ARG_tx].u_obj);
 
     if ( (tx == NULL) && (rx == NULL) ) {
         mp_raise_ValueError(translate("tx and rx cannot both be None"));
@@ -132,9 +132,9 @@ STATIC mp_obj_t busio_uart_make_new(const mp_obj_type_t *type, size_t n_args, co
     mp_float_t timeout = mp_obj_get_float(args[ARG_timeout].u_obj);
     validate_timeout(timeout);
 
-    const mcu_pin_obj_t* rts = validate_is_free_pin_or_none(args[ARG_rts].u_obj);
-    const mcu_pin_obj_t* cts = validate_is_free_pin_or_none(args[ARG_cts].u_obj);
-    const mcu_pin_obj_t* rs485_dir = validate_is_free_pin_or_none(args[ARG_rs485_dir].u_obj);
+    const mcu_pin_obj_t* rts = validate_obj_is_free_pin_or_none(args[ARG_rts].u_obj);
+    const mcu_pin_obj_t* cts = validate_obj_is_free_pin_or_none(args[ARG_cts].u_obj);
+    const mcu_pin_obj_t* rs485_dir = validate_obj_is_free_pin_or_none(args[ARG_rs485_dir].u_obj);
 
     const bool rs485_invert = args[ARG_rs485_invert].u_bool;
 
diff --git a/shared-bindings/digitalio/DigitalInOut.c b/shared-bindings/digitalio/DigitalInOut.c
index 1610c83f8..39da00cf7 100644
--- a/shared-bindings/digitalio/DigitalInOut.c
+++ b/shared-bindings/digitalio/DigitalInOut.c
@@ -68,7 +68,7 @@ STATIC mp_obj_t digitalio_digitalinout_make_new(const mp_obj_type_t *type,
     digitalio_digitalinout_obj_t *self = m_new_obj(digitalio_digitalinout_obj_t);
     self->base.type = &digitalio_digitalinout_type;
 
-    mcu_pin_obj_t *pin = validate_is_free_pin(args[0]);
+    mcu_pin_obj_t *pin = validate_obj_is_free_pin(args[0]);
     common_hal_digitalio_digitalinout_construct(self, pin);
 
     return MP_OBJ_FROM_PTR(self);
diff --git a/shared-bindings/displayio/Display.c b/shared-bindings/displayio/Display.c
index 9fa976b86..991c828be 100644
--- a/shared-bindings/displayio/Display.c
+++ b/shared-bindings/displayio/Display.c
@@ -141,7 +141,7 @@ STATIC mp_obj_t displayio_display_make_new(const mp_obj_type_t *type, size_t n_a
     mp_buffer_info_t bufinfo;
     mp_get_buffer_raise(args[ARG_init_sequence].u_obj, &bufinfo, MP_BUFFER_READ);
 
-    const mcu_pin_obj_t* backlight_pin = validate_is_free_pin_or_none(args[ARG_backlight_pin].u_obj);
+    const mcu_pin_obj_t* backlight_pin = validate_obj_is_free_pin_or_none(args[ARG_backlight_pin].u_obj);
 
     mp_float_t brightness = mp_obj_get_float(args[ARG_brightness].u_obj);
 
diff --git a/shared-bindings/displayio/EPaperDisplay.c b/shared-bindings/displayio/EPaperDisplay.c
index 60a3838a4..25a4a41e9 100644
--- a/shared-bindings/displayio/EPaperDisplay.c
+++ b/shared-bindings/displayio/EPaperDisplay.c
@@ -129,7 +129,7 @@ STATIC mp_obj_t displayio_epaperdisplay_make_new(const mp_obj_type_t *type, size
     mp_get_buffer_raise(args[ARG_stop_sequence].u_obj, &stop_bufinfo, MP_BUFFER_READ);
 
 
-    const mcu_pin_obj_t* busy_pin = validate_is_free_pin_or_none(args[ARG_busy_pin].u_obj);
+    const mcu_pin_obj_t* busy_pin = validate_obj_is_free_pin_or_none(args[ARG_busy_pin].u_obj);
 
     mp_int_t rotation = args[ARG_rotation].u_int;
     if (rotation % 90 != 0) {
diff --git a/shared-bindings/displayio/FourWire.c b/shared-bindings/displayio/FourWire.c
index f013cc18f..2cbceec48 100644
--- a/shared-bindings/displayio/FourWire.c
+++ b/shared-bindings/displayio/FourWire.c
@@ -73,9 +73,9 @@ STATIC mp_obj_t displayio_fourwire_make_new(const mp_obj_type_t *type, size_t n_
     mp_arg_val_t args[MP_ARRAY_SIZE(allowed_args)];
     mp_arg_parse_all(n_args, pos_args, kw_args, MP_ARRAY_SIZE(allowed_args), allowed_args, args);
 
-    mcu_pin_obj_t *command = validate_is_free_pin(args[ARG_command].u_obj);
-    mcu_pin_obj_t *chip_select = validate_is_free_pin(args[ARG_chip_select].u_obj);
-    mcu_pin_obj_t *reset = validate_is_free_pin_or_none(args[ARG_reset].u_obj);
+    mcu_pin_obj_t *command = validate_obj_is_free_pin(args[ARG_command].u_obj);
+    mcu_pin_obj_t *chip_select = validate_obj_is_free_pin(args[ARG_chip_select].u_obj);
+    mcu_pin_obj_t *reset = validate_obj_is_free_pin_or_none(args[ARG_reset].u_obj);
 
     displayio_fourwire_obj_t* self = NULL;
     mp_obj_t spi = args[ARG_spi_bus].u_obj;
diff --git a/shared-bindings/displayio/I2CDisplay.c b/shared-bindings/displayio/I2CDisplay.c
index 03779fba9..2e312aa14 100644
--- a/shared-bindings/displayio/I2CDisplay.c
+++ b/shared-bindings/displayio/I2CDisplay.c
@@ -69,7 +69,7 @@ STATIC mp_obj_t displayio_i2cdisplay_make_new(const mp_obj_type_t *type, size_t
     mp_arg_val_t args[MP_ARRAY_SIZE(allowed_args)];
     mp_arg_parse_all(n_args, pos_args, kw_args, MP_ARRAY_SIZE(allowed_args), allowed_args, args);
 
-    mcu_pin_obj_t *reset = validate_is_free_pin_or_none(args[ARG_reset].u_obj);
+    mcu_pin_obj_t *reset = validate_obj_is_free_pin_or_none(args[ARG_reset].u_obj);
 
     displayio_i2cdisplay_obj_t* self = NULL;
     mp_obj_t i2c = args[ARG_i2c_bus].u_obj;
diff --git a/shared-bindings/displayio/ParallelBus.c b/shared-bindings/displayio/ParallelBus.c
index 33a165af9..ea1753f31 100644
--- a/shared-bindings/displayio/ParallelBus.c
+++ b/shared-bindings/displayio/ParallelBus.c
@@ -76,12 +76,12 @@ STATIC mp_obj_t displayio_parallelbus_make_new(const mp_obj_type_t *type, size_t
     mp_arg_val_t args[MP_ARRAY_SIZE(allowed_args)];
     mp_arg_parse_all(n_args, pos_args, kw_args, MP_ARRAY_SIZE(allowed_args), allowed_args, args);
 
-    mcu_pin_obj_t *data0 = validate_is_free_pin(args[ARG_data0].u_obj);
-    mcu_pin_obj_t *command = validate_is_free_pin(args[ARG_command].u_obj);
-    mcu_pin_obj_t *chip_select = validate_is_free_pin(args[ARG_chip_select].u_obj);
-    mcu_pin_obj_t *write = validate_is_free_pin(args[ARG_write].u_obj);
-    mcu_pin_obj_t *read = validate_is_free_pin(args[ARG_read].u_obj);
-    mcu_pin_obj_t *reset = validate_is_free_pin(args[ARG_reset].u_obj);
+    mcu_pin_obj_t *data0 = validate_obj_is_free_pin(args[ARG_data0].u_obj);
+    mcu_pin_obj_t *command = validate_obj_is_free_pin(args[ARG_command].u_obj);
+    mcu_pin_obj_t *chip_select = validate_obj_is_free_pin(args[ARG_chip_select].u_obj);
+    mcu_pin_obj_t *write = validate_obj_is_free_pin(args[ARG_write].u_obj);
+    mcu_pin_obj_t *read = validate_obj_is_free_pin(args[ARG_read].u_obj);
+    mcu_pin_obj_t *reset = validate_obj_is_free_pin(args[ARG_reset].u_obj);
 
     displayio_parallelbus_obj_t* self = NULL;
     for (uint8_t i = 0; i < CIRCUITPY_DISPLAY_LIMIT; i++) {
diff --git a/shared-bindings/frequencyio/FrequencyIn.c b/shared-bindings/frequencyio/FrequencyIn.c
index 349ef7e97..6743f8706 100644
--- a/shared-bindings/frequencyio/FrequencyIn.c
+++ b/shared-bindings/frequencyio/FrequencyIn.c
@@ -87,7 +87,7 @@ STATIC mp_obj_t frequencyio_frequencyin_make_new(const mp_obj_type_t *type, size
     mp_arg_val_t args[MP_ARRAY_SIZE(allowed_args)];
     mp_arg_parse_all(n_args, pos_args, kw_args, MP_ARRAY_SIZE(allowed_args), allowed_args, args);
 
-    mcu_pin_obj_t* pin = validate_is_free_pin(args[ARG_pin].u_obj);
+    mcu_pin_obj_t* pin = validate_obj_is_free_pin(args[ARG_pin].u_obj);
 
     const uint16_t capture_period = args[ARG_capture_period].u_int;
 
diff --git a/shared-bindings/i2cslave/I2CSlave.c b/shared-bindings/i2cslave/I2CSlave.c
index b7980d517..e28eb3f25 100644
--- a/shared-bindings/i2cslave/I2CSlave.c
+++ b/shared-bindings/i2cslave/I2CSlave.c
@@ -77,8 +77,8 @@ STATIC mp_obj_t i2cslave_i2c_slave_make_new(const mp_obj_type_t *type, size_t n_
     mp_arg_val_t args[MP_ARRAY_SIZE(allowed_args)];
     mp_arg_parse_all(n_args, pos_args, kw_args, MP_ARRAY_SIZE(allowed_args), allowed_args, args);
 
-    const mcu_pin_obj_t* scl = validate_is_free_pin(args[ARG_scl].u_obj);
-    const mcu_pin_obj_t* sda = validate_is_free_pin(args[ARG_sda].u_obj);
+    const mcu_pin_obj_t* scl = validate_obj_is_free_pin(args[ARG_scl].u_obj);
+    const mcu_pin_obj_t* sda = validate_obj_is_free_pin(args[ARG_sda].u_obj);
 
     mp_obj_iter_buf_t iter_buf;
     mp_obj_t iterable = mp_getiter(args[ARG_addresses].u_obj, &iter_buf);
diff --git a/shared-bindings/microcontroller/Pin.c b/shared-bindings/microcontroller/Pin.c
index ef8008827..67aecaf66 100644
--- a/shared-bindings/microcontroller/Pin.c
+++ b/shared-bindings/microcontroller/Pin.c
@@ -84,7 +84,7 @@ const mp_obj_type_t mcu_pin_type = {
     .print = mcu_pin_print
 };
 
-mcu_pin_obj_t *validate_is_pin(mp_obj_t obj) {
+mcu_pin_obj_t *validate_obj_is_pin(mp_obj_t obj) {
     if (!MP_OBJ_IS_TYPE(obj, &mcu_pin_type)) {
         mp_raise_TypeError_varg(translate("Expected a %q"), mcu_pin_type.name);
     }
@@ -92,25 +92,25 @@ mcu_pin_obj_t *validate_is_pin(mp_obj_t obj) {
 }
 
 // Validate that the obj is a pin or None. Return an mcu_pin_obj_t* or NULL, correspondingly.
-mcu_pin_obj_t *validate_is_pin_or_none(mp_obj_t obj) {
+mcu_pin_obj_t *validate_obj_is_pin_or_none(mp_obj_t obj) {
     if (obj == mp_const_none) {
         return NULL;
     }
-    return validate_is_pin(obj);
+    return validate_obj_is_pin(obj);
 }
 
-mcu_pin_obj_t *validate_is_free_pin(mp_obj_t obj) {
-    mcu_pin_obj_t *pin = validate_is_pin(obj);
+mcu_pin_obj_t *validate_obj_is_free_pin(mp_obj_t obj) {
+    mcu_pin_obj_t *pin = validate_obj_is_pin(obj);
     assert_pin_free(pin);
     return pin;
 }
 
 // Validate that the obj is a free pin or None. Return an mcu_pin_obj_t* or NULL, correspondingly.
-mcu_pin_obj_t *validate_is_free_pin_or_none(mp_obj_t obj) {
+mcu_pin_obj_t *validate_obj_is_free_pin_or_none(mp_obj_t obj) {
     if (obj == mp_const_none) {
         return NULL;
     }
-    mcu_pin_obj_t *pin = validate_is_pin(obj);
+    mcu_pin_obj_t *pin = validate_obj_is_pin(obj);
     assert_pin_free(pin);
     return pin;
 }
diff --git a/shared-bindings/microcontroller/Pin.h b/shared-bindings/microcontroller/Pin.h
index 2b4083827..4f29322a0 100644
--- a/shared-bindings/microcontroller/Pin.h
+++ b/shared-bindings/microcontroller/Pin.h
@@ -33,10 +33,10 @@
 // Type object used in Python. Should be shared between ports.
 extern const mp_obj_type_t mcu_pin_type;
 
-mcu_pin_obj_t *validate_is_pin(mp_obj_t obj);
-mcu_pin_obj_t *validate_is_pin_or_none(mp_obj_t obj);
-mcu_pin_obj_t *validate_is_free_pin(mp_obj_t obj);
-mcu_pin_obj_t *validate_is_free_pin_or_none(mp_obj_t obj);
+mcu_pin_obj_t *validate_obj_is_pin(mp_obj_t obj);
+mcu_pin_obj_t *validate_obj_is_pin_or_none(mp_obj_t obj);
+mcu_pin_obj_t *validate_obj_is_free_pin(mp_obj_t obj);
+mcu_pin_obj_t *validate_obj_is_free_pin_or_none(mp_obj_t obj);
 
 void assert_pin_free(const mcu_pin_obj_t* pin);
 
diff --git a/shared-bindings/ps2io/Ps2.c b/shared-bindings/ps2io/Ps2.c
index f5aa70907..89ed0a76c 100644
--- a/shared-bindings/ps2io/Ps2.c
+++ b/shared-bindings/ps2io/Ps2.c
@@ -78,8 +78,8 @@ STATIC mp_obj_t ps2io_ps2_make_new(const mp_obj_type_t *type, size_t n_args, con
     mp_arg_val_t args[MP_ARRAY_SIZE(allowed_args)];
     mp_arg_parse_all(n_args, pos_args, kw_args, MP_ARRAY_SIZE(allowed_args), allowed_args, args);
 
-    const mcu_pin_obj_t* clkpin = validate_is_free_pin(args[ARG_clkpin].u_obj);
-    const mcu_pin_obj_t* datapin = validate_is_free_pin(args[ARG_datapin].u_obj);
+    const mcu_pin_obj_t* clkpin = validate_obj_is_free_pin(args[ARG_clkpin].u_obj);
+    const mcu_pin_obj_t* datapin = validate_obj_is_free_pin(args[ARG_datapin].u_obj);
 
     ps2io_ps2_obj_t *self = m_new_obj(ps2io_ps2_obj_t);
     self->base.type = &ps2io_ps2_type;
diff --git a/shared-bindings/pulseio/PWMOut.c b/shared-bindings/pulseio/PWMOut.c
index d04b469c1..2491a5c3f 100644
--- a/shared-bindings/pulseio/PWMOut.c
+++ b/shared-bindings/pulseio/PWMOut.c
@@ -96,7 +96,7 @@ STATIC mp_obj_t pulseio_pwmout_make_new(const mp_obj_type_t *type, size_t n_args
     mp_arg_val_t parsed_args[MP_ARRAY_SIZE(allowed_args)];
     mp_arg_parse_all(n_args, args, kw_args, MP_ARRAY_SIZE(allowed_args), allowed_args, parsed_args);
 
-    const mcu_pin_obj_t *pin = validate_is_free_pin(parsed_args[ARG_pin].u_obj);
+    const mcu_pin_obj_t *pin = validate_obj_is_free_pin(parsed_args[ARG_pin].u_obj);
 
     uint16_t duty_cycle = parsed_args[ARG_duty_cycle].u_int;
     uint32_t frequency = parsed_args[ARG_frequency].u_int;
diff --git a/shared-bindings/pulseio/PulseIn.c b/shared-bindings/pulseio/PulseIn.c
index dbab253af..6c01a4c17 100644
--- a/shared-bindings/pulseio/PulseIn.c
+++ b/shared-bindings/pulseio/PulseIn.c
@@ -90,7 +90,7 @@ STATIC mp_obj_t pulseio_pulsein_make_new(const mp_obj_type_t *type, size_t n_arg
     };
     mp_arg_val_t args[MP_ARRAY_SIZE(allowed_args)];
     mp_arg_parse_all(n_args, pos_args, kw_args, MP_ARRAY_SIZE(allowed_args), allowed_args, args);
-    const mcu_pin_obj_t* pin = validate_is_free_pin(args[ARG_pin].u_obj);
+    const mcu_pin_obj_t* pin = validate_obj_is_free_pin(args[ARG_pin].u_obj);
 
     pulseio_pulsein_obj_t *self = m_new_obj(pulseio_pulsein_obj_t);
     self->base.type = &pulseio_pulsein_type;
diff --git a/shared-bindings/rotaryio/IncrementalEncoder.c b/shared-bindings/rotaryio/IncrementalEncoder.c
index 78dccacb5..058241d24 100644
--- a/shared-bindings/rotaryio/IncrementalEncoder.c
+++ b/shared-bindings/rotaryio/IncrementalEncoder.c
@@ -73,8 +73,8 @@ STATIC mp_obj_t rotaryio_incrementalencoder_make_new(const mp_obj_type_t *type,
     mp_arg_val_t args[MP_ARRAY_SIZE(allowed_args)];
     mp_arg_parse_all(n_args, pos_args, kw_args, MP_ARRAY_SIZE(allowed_args), allowed_args, args);
 
-    const mcu_pin_obj_t* pin_a = validate_is_free_pin(args[ARG_pin_a].u_obj);
-    const mcu_pin_obj_t* pin_b = validate_is_free_pin(args[ARG_pin_b].u_obj);
+    const mcu_pin_obj_t* pin_a = validate_obj_is_free_pin(args[ARG_pin_a].u_obj);
+    const mcu_pin_obj_t* pin_b = validate_obj_is_free_pin(args[ARG_pin_b].u_obj);
 
     rotaryio_incrementalencoder_obj_t *self = m_new_obj(rotaryio_incrementalencoder_obj_t);
     self->base.type = &rotaryio_incrementalencoder_type;
diff --git a/shared-bindings/touchio/TouchIn.c b/shared-bindings/touchio/TouchIn.c
index 5eadb2cc4..db53ec1bc 100644
--- a/shared-bindings/touchio/TouchIn.c
+++ b/shared-bindings/touchio/TouchIn.c
@@ -66,7 +66,7 @@ STATIC mp_obj_t touchio_touchin_make_new(const mp_obj_type_t *type,
     mp_arg_check_num(n_args, kw_args, 1, 1, false);
 
     // 1st argument is the pin
-    const mcu_pin_obj_t *pin = validate_is_free_pin(args[0]);
+    const mcu_pin_obj_t *pin = validate_obj_is_free_pin(args[0]);
 
     touchio_touchin_obj_t *self = m_new_obj(touchio_touchin_obj_t);
     self->base.type = &touchio_touchin_type;
diff --git a/shared-bindings/wiznet/wiznet5k.c b/shared-bindings/wiznet/wiznet5k.c
index 1b7f76e12..786978bfe 100644
--- a/shared-bindings/wiznet/wiznet5k.c
+++ b/shared-bindings/wiznet/wiznet5k.c
@@ -78,8 +78,8 @@ STATIC mp_obj_t wiznet5k_make_new(const mp_obj_type_t *type, size_t n_args, cons
     mp_arg_val_t args[MP_ARRAY_SIZE(allowed_args)];
     mp_arg_parse_all(n_args, pos_args, kw_args, MP_ARRAY_SIZE(allowed_args), allowed_args, args);
     // TODO check type of ARG_spi?
-    const mcu_pin_obj_t *cs = validate_is_free_pin(args[ARG_cs].u_obj);
-    const mcu_pin_obj_t *rst = validate_is_free_pin_or_none(args[ARG_rst].u_obj);
+    const mcu_pin_obj_t *cs = validate_obj_is_free_pin(args[ARG_cs].u_obj);
+    const mcu_pin_obj_t *rst = validate_obj_is_free_pin_or_none(args[ARG_rst].u_obj);
 
     mp_obj_t ret = wiznet5k_create(args[ARG_spi].u_obj, cs, rst);
     if (args[ARG_dhcp].u_bool) wiznet5k_start_dhcp();