rp2040: Add spi0_gpio4_gpio3_gpio2 bus to support fysetc PITB V2 (#6683)

The Fysetc PITB V2 board uses a spi bus config that is supported by the
RP2040 chip, but not klipper, so this adds the relevant config to the file
to allow you to run the tmc5160's on the board via hardware SPI.  This
resolves the issue of software spi not working on this board, which I
was unable to fully understand.

I have also seen other users encounter similar bus config issues with
the rp2040 setting up things like accelerometers and such with this
pin layout.

As requested, this also uses the new convention for spi bus naming, while
maintaining the old bus names for compatibility.

Signed-off-by: Jessica Hunt <[email protected]>

src/rp2040/spi.c

@@ -11,6 +11,26 @@
 #include "hardware/structs/spi.h" // spi_hw_t
 #include "hardware/regs/resets.h" // RESETS_RESET_SPI*_BITS
 
+
+DECL_ENUMERATION("spi_bus", "spi0_gpio0_gpio3_gpio2", 0);
+DECL_CONSTANT_STR("BUS_PINS_spi0_gpio0_gpio3_gpio2", "gpio0,gpio3,gpio2");
+DECL_ENUMERATION("spi_bus", "spi0_gpio4_gpio7_gpio6", 1);
+DECL_CONSTANT_STR("BUS_PINS_spi0_gpio4_gpio7_gpio6", "gpio4,gpio7,gpio6");
+DECL_ENUMERATION("spi_bus", "spi0_gpio16_gpio19_gpio18", 2);
+DECL_CONSTANT_STR("BUS_PINS_spi0_gpio16_gpio19_gpio18", "gpio16,gpio19,gpio18");
+DECL_ENUMERATION("spi_bus", "spi0_gpio20_gpio23_gpio22", 3);
+DECL_CONSTANT_STR("BUS_PINS_spi0_gpio20_gpio23_gpio22", "gpio20,gpio23,gpio22");
+DECL_ENUMERATION("spi_bus", "spi0_gpio4_gpio3_gpio2", 4);
+DECL_CONSTANT_STR("BUS_PINS_spi0_gpio4_gpio3_gpio2", "gpio4,gpio3,gpio2");
+
+DECL_ENUMERATION("spi_bus", "spi1_gpio8_gpio11_gpio10", 5);
+DECL_CONSTANT_STR("BUS_PINS_spi1_gpio8_gpio11_gpio10", "gpio8,gpio11,gpio10");
+DECL_ENUMERATION("spi_bus", "spi1_gpio12_gpio15_gpio14", 6);
+DECL_CONSTANT_STR("BUS_PINS_spi1_gpio12_gpio15_gpio14", "gpio12,gpio15,gpio14");
+DECL_ENUMERATION("spi_bus", "spi1_gpio24_gpio27_gpio26", 7);
+DECL_CONSTANT_STR("BUS_PINS_spi1_gpio24_gpio27_gpio26", "gpio24,gpio27,gpio26");
+
+//Deprecated "spi0a" style mappings
 DECL_ENUMERATION("spi_bus", "spi0a", 0);
 DECL_CONSTANT_STR("BUS_PINS_spi0a", "gpio0,gpio3,gpio2");
 DECL_ENUMERATION("spi_bus", "spi0b", 1);
@@ -20,11 +40,11 @@ DECL_CONSTANT_STR("BUS_PINS_spi0c", "gpio16,gpio19,gpio18");
 DECL_ENUMERATION("spi_bus", "spi0d", 3);
 DECL_CONSTANT_STR("BUS_PINS_spi0d", "gpio20,gpio23,gpio22");
 
-DECL_ENUMERATION("spi_bus", "spi1a", 4);
+DECL_ENUMERATION("spi_bus", "spi1a", 5);
 DECL_CONSTANT_STR("BUS_PINS_spi1a", "gpio8,gpio11,gpio10");
-DECL_ENUMERATION("spi_bus", "spi1b", 5);
+DECL_ENUMERATION("spi_bus", "spi1b", 6);
 DECL_CONSTANT_STR("BUS_PINS_spi1b", "gpio12,gpio15,gpio14");
-DECL_ENUMERATION("spi_bus", "spi1c", 6);
+DECL_ENUMERATION("spi_bus", "spi1c", 7);
 DECL_CONSTANT_STR("BUS_PINS_spi1c", "gpio24,gpio27,gpio26");
 
 struct spi_info {
@@ -38,6 +58,7 @@ static const struct spi_info spi_bus[] = {
     {spi0_hw, 4,  7,  6,  RESETS_RESET_SPI0_BITS},
     {spi0_hw, 16, 19, 18, RESETS_RESET_SPI0_BITS},
     {spi0_hw, 20, 23, 22, RESETS_RESET_SPI0_BITS},
+    {spi0_hw, 4,  3,  2,  RESETS_RESET_SPI0_BITS},
 
     {spi1_hw, 8,  11, 10, RESETS_RESET_SPI1_BITS},
     {spi1_hw, 12, 15, 14, RESETS_RESET_SPI1_BITS},