| Joachim Eastwood | a9ed9eb | 2015-04-28 00:14:09 +0200 | [diff] [blame^] | 1 | NXP LPC18xx/43xx SCU pin controller Device Tree Bindings |
| 2 | -------------------------------------------------------- |
| 3 | |
| 4 | Required properties: |
| 5 | - compatible : Should be "nxp,lpc1850-scu" |
| 6 | - reg : Address and length of the register set for the device |
| 7 | - clocks : Clock specifier (see clock bindings for details) |
| 8 | |
| 9 | The lpc1850-scu driver uses the generic pin multiplexing and generic pin |
| 10 | configuration documented in pinctrl-bindings.txt. |
| 11 | |
| 12 | The following generic nodes are supported: |
| 13 | - function |
| 14 | - pins |
| 15 | - bias-disable |
| 16 | - bias-pull-up |
| 17 | - bias-pull-down |
| 18 | - drive-strength |
| 19 | - input-enable |
| 20 | - input-disable |
| 21 | - input-schmitt-enable |
| 22 | - input-schmitt-disable |
| 23 | - slew-rate |
| 24 | |
| 25 | Not all pins support all properties so either refer to the NXP 1850/4350 |
| 26 | user manual or the pin table in the pinctrl-lpc18xx driver for supported |
| 27 | pin properties. |
| 28 | |
| 29 | Example: |
| 30 | pinctrl: pinctrl@40086000 { |
| 31 | compatible = "nxp,lpc1850-scu"; |
| 32 | reg = <0x40086000 0x1000>; |
| 33 | clocks = <&ccu1 CLK_CPU_SCU>; |
| 34 | |
| 35 | i2c0_pins: i2c0-pins { |
| 36 | i2c0_pins_cfg { |
| 37 | pins = "i2c0_scl", "i2c0_sda"; |
| 38 | function = "i2c0"; |
| 39 | input-enable; |
| 40 | }; |
| 41 | }; |
| 42 | |
| 43 | uart0_pins: uart0-pins { |
| 44 | uart0_rx_cfg { |
| 45 | pins = "pf_11"; |
| 46 | function = "uart0"; |
| 47 | bias-disable; |
| 48 | input-enable; |
| 49 | }; |
| 50 | |
| 51 | uart0_tx_cfg { |
| 52 | pins = "pf_10"; |
| 53 | function = "uart0"; |
| 54 | bias-disable; |
| 55 | }; |
| 56 | }; |
| 57 | }; |