[v3,5/9] dt-bindings: pinctrl: update bindings for MT7986 SoC
From: Sam Shih
Date: Tue Sep 14 2021 - 04:53:11 EST
This updates bindings for MT7986 pinctrl driver. The
difference of pinctrl between mt7986a and mt7986b is that pin-41 to pin-65
do not exist on mt7986b
Signed-off-by: Sam Shih <sam.shih@xxxxxxxxxxxx>
---
v3 : make mt7986 pinctrl bindings as a separate file
v2 : deleted the redundant description of mt7986a/mt7986b
---
.../pinctrl/mediatek,mt7986-pinctrl.txt | 300 ++++++++++++++++++
1 file changed, 300 insertions(+)
create mode 100644 Documentation/devicetree/bindings/pinctrl/mediatek,mt7986-pinctrl.txt
diff --git a/Documentation/devicetree/bindings/pinctrl/mediatek,mt7986-pinctrl.txt b/Documentation/devicetree/bindings/pinctrl/mediatek,mt7986-pinctrl.txt
new file mode 100644
index 000000000000..5805e53d5924
--- /dev/null
+++ b/Documentation/devicetree/bindings/pinctrl/mediatek,mt7986-pinctrl.txt
@@ -0,0 +1,300 @@
+* Mediatek MT7986 Pin Controller
+
+The Mediatek's Pin controller is used to control SoC pins.
+
+Required properties for the root node:
+ - compatible: Should be one of the following
+ "mediatek,mt7986a-pinctrl" for MT7986a SoC
+ "mediatek,mt7986b-pinctrl" for MT7986b SoC
+ - gpio-controller: Marks the device node as a GPIO controller.
+ - #gpio-cells: number of cells in GPIO specifier. Since the generic GPIO
+ binding is used, the amount of cells must be specified as 2. See the below
+ mentioned gpio binding representation for description of particular cells.
+ - gpio-ranges : gpio valid number range.
+ - reg: physical address base for gpio base registers. There are 8 GPIO
+ physical address base in mt8183.
+
+Optional properties:
+- reg-names: gpio base register names. There are 8 gpio base register
+ names in mt7986. They are "gpio_base", "iocfg_rt_base", "iocfg_rb_base",
+ "iocfg_lt_base", "iocfg_lb_base", "iocfg_tr_base", "iocfg_tl_base", "eint".
+- interrupt-controller: Marks the device node as an interrupt controller
+
+If the property interrupt-controller is defined, following property is required
+- interrupts : The interrupt outputs to gic.
+- #interrupt-cells: Should be two.
+
+Please refer to pinctrl-bindings.txt in this directory for details of the
+common pinctrl bindings used by client devices, including the meaning of the
+phrase "pin configuration node".
+
+MT7986 pin configuration nodes act as a container for an arbitrary number of
+subnodes. Each of these subnodes represents some desired configuration for a
+pin, a group, or a list of pins or groups. This configuration can include the
+mux function to select on those pin(s)/group(s), and various pin configuration
+parameters, such as pull-up, drive-strength, etc.
+
+We support 2 types of configuration nodes. Those nodes can be either pinmux
+nodes or pinconf nodes. Each configuration node can consist of multiple nodes
+describing the pinmux and pinconf options.
+
+The name of each subnode doesn't matter as long as it is unique; all subnodes
+should be enumerated and processed purely based on their content.
+
+== pinmux nodes content ==
+
+The following generic properties as defined in pinctrl-bindings.txt are valid
+to specify in a pinmux subnode:
+
+Required properties are:
+ - groups: An array of strings. Each string contains the name of a group.
+ Valid values for these names are listed below.
+ - function: A string containing the name of the function to mux to the
+ group. Valid values for function names are listed below.
+
+== pinconf nodes content ==
+
+The following generic properties as defined in pinctrl-bindings.txt are valid
+to specify in a pinconf subnode:
+
+Required properties are:
+ - pins: An array of strings. Each string contains the name of a pin.
+ Valid values for these names are listed below.
+ - groups: An array of strings. Each string contains the name of a group.
+ Valid values for these names are listed below.
+
+Optional properies are:
+ - GENERIC_PINCONFIG: is the generic pinconfig options to use, bias-disable,
+ bias-pull-down, bias-pull-up, input-enable, input-disable, output-low,
+ output-high, input-schmitt-enable, input-schmitt-disable
+ and drive-strength are valid.
+ Valid arguments for 'drive-strength': 2, 4, 6, 8, 10, 12, 14, 16 in mA.
+ - mediatek,pull-up-adv
+ Valid arguments for 'mediatek,pull-up-adv' are '0', '1', '2', '3'
+ Pull up setings for 2 pull resistors, R0 and R1. User can
+ configure those special pins. Valid arguments are described as below:
+ 0: (R1, R0) = (0, 0) which means R1 disabled and R0 disabled.
+ 1: (R1, R0) = (0, 1) which means R1 disabled and R0 enabled.
+ 2: (R1, R0) = (1, 0) which means R1 enabled and R0 disabled.
+ 3: (R1, R0) = (1, 1) which means R1 enabled and R0 enabled.
+ - mediatek,pull-down-adv
+ Valid arguments for 'mediatek,pull-down-adv' are '0', '1', '2', '3'
+ Pull down settings for 2 pull resistors, R0 and R1. User can
+ configure those special pins. Valid arguments are described as below:
+ 0: (R1, R0) = (0, 0) which means R1 disabled and R0 disabled.
+ 1: (R1, R0) = (0, 1) which means R1 disabled and R0 enabled.
+ 2: (R1, R0) = (1, 0) which means R1 enabled and R0 disabled.
+ 3: (R1, R0) = (1, 1) which means R1 enabled and R0 enabled.
+ - mediatek,tdsel: An integer describing the steps for output level shifter duty
+ cycle when asserted (high pulse width adjustment). Valid arguments are from 0
+ to 15.
+ - mediatek,rdsel: An integer describing the steps for input level shifter duty
+ cycle when asserted (high pulse width adjustment). Valid arguments are from 0
+ to 63.
+
+== Valid values for pins, function and groups on MT7986a and MT7986b ==
+
+Valid values for pins are:
+pins can be referenced via the pin names as the below table shown and the
+related physical number is also put ahead of those names which helps cross
+references to pins between groups to know whether pins assignment conflict
+happens among devices try to acquire those available pins.
+
+There is no PIN 41 to PIN 65 on mt7686b, you can only use those pins on mt7986a.
+
+ Pin #: Valid values for pins
+ -----------------------------
+ PIN 0: "SYS_WATCHDOG"
+ PIN 1: "WF2G_LED"
+ PIN 2: "WF5G_LED"
+ PIN 3: "I2C_SCL"
+ PIN 4: "I2C_SDA"
+ PIN 5: "GPIO_0"
+ PIN 6: "GPIO_1"
+ PIN 7: "GPIO_2"
+ PIN 8: "GPIO_3"
+ PIN 9: "GPIO_4"
+ PIN 10: "GPIO_5"
+ PIN 11: "GPIO_6"
+ PIN 12: "GPIO_7"
+ PIN 13: "GPIO_8"
+ PIN 14: "GPIO_9"
+ PIN 15: "GPIO_10"
+ PIN 16: "GPIO_11"
+ PIN 17: "GPIO_12"
+ PIN 18: "GPIO_13"
+ PIN 19: "GPIO_14"
+ PIN 20: "GPIO_15"
+ PIN 21: "PWM0"
+ PIN 22: "PWM1"
+ PIN 23: "SPI0_CLK"
+ PIN 24: "SPI0_MOSI"
+ PIN 25: "SPI0_MISO"
+ PIN 26: "SPI0_CS"
+ PIN 27: "SPI0_HOLD"
+ PIN 28: "SPI0_WP"
+ PIN 29: "SPI1_CLK"
+ PIN 30: "SPI1_MOSI"
+ PIN 31: "SPI1_MISO"
+ PIN 32: "SPI1_CS"
+ PIN 33: "SPI2_CLK"
+ PIN 34: "SPI2_MOSI"
+ PIN 35: "SPI2_MISO"
+ PIN 36: "SPI2_CS"
+ PIN 37: "SPI2_HOLD"
+ PIN 38: "SPI2_WP"
+ PIN 39: "UART0_RXD"
+ PIN 40: "UART0_TXD"
+ PIN 41: "PCIE_PERESET_N"
+ PIN 42: "UART1_RXD"
+ PIN 43: "UART1_TXD"
+ PIN 44: "UART1_CTS"
+ PIN 45: "UART1_RTS"
+ PIN 46: "UART2_RXD"
+ PIN 47: "UART2_TXD"
+ PIN 48: "UART2_CTS"
+ PIN 49: "UART2_RTS"
+ PIN 50: "EMMC_DATA_0"
+ PIN 51: "EMMC_DATA_1"
+ PIN 52: "EMMC_DATA_2"
+ PIN 53: "EMMC_DATA_3"
+ PIN 54: "EMMC_DATA_4"
+ PIN 55: "EMMC_DATA_5"
+ PIN 56: "EMMC_DATA_6"
+ PIN 57: "EMMC_DATA_7"
+ PIN 58: "EMMC_CMD"
+ PIN 59: "EMMC_CK"
+ PIN 60: "EMMC_DSL"
+ PIN 61: "EMMC_RSTB"
+ PIN 62: "PCM_DTX"
+ PIN 63: "PCM_DRX"
+ PIN 64: "PCM_CLK"
+ PIN 65: "PCM_FS"
+ PIN 66: "MT7531_INT"
+ PIN 67: "SMI_MDC"
+ PIN 68: "SMI_MDIO"
+ PIN 69: "WF0_DIG_RESETB"
+ PIN 70: "WF0_CBA_RESETB"
+ PIN 71: "WF0_XO_REQ"
+ PIN 72: "WF0_TOP_CLK"
+ PIN 73: "WF0_TOP_DATA"
+ PIN 74: "WF0_HB1"
+ PIN 75: "WF0_HB2"
+ PIN 76: "WF0_HB3"
+ PIN 77: "WF0_HB4"
+ PIN 78: "WF0_HB0"
+ PIN 79: "WF0_HB0_B"
+ PIN 80: "WF0_HB5"
+ PIN 81: "WF0_HB6"
+ PIN 82: "WF0_HB7"
+ PIN 83: "WF0_HB8"
+ PIN 84: "WF0_HB9"
+ PIN 85: "WF0_HB10"
+ PIN 86: "WF1_DIG_RESETB"
+ PIN 87: "WF1_CBA_RESETB"
+ PIN 88: "WF1_XO_REQ"
+ PIN 89: "WF1_TOP_CLK"
+ PIN 90: "WF1_TOP_DATA"
+ PIN 91: "WF1_HB1"
+ PIN 92: "WF1_HB2"
+ PIN 93: "WF1_HB3"
+ PIN 94: "WF1_HB4"
+ PIN 95: "WF1_HB0"
+ PIN 96: "WF1_HB0_B"
+ PIN 97: "WF1_HB5"
+ PIN 98: "WF1_HB6"
+ PIN 99: "WF1_HB7"
+ PIN 100: "WF1_HB8"
+
+Valid values for function are:
+ "audio, "emmc", "eth", "i2c", "wifi", "led", "flash", "pcie",
+ "pwm", "spi", "uart", "watchdog"
+
+There is no "audio", "pcie" functions on mt7986b, you can only use those
+functions on mt7986a.
+
+Valid values for groups are:
+additional data is put followingly with valid value allowing us to know which
+applicable function and which relevant pins (in pin#) are able applied for that
+group.
+
+There is no "pcie_pereset", "uart1", "uart2" "emmc_51", "pcm", and "i2s" groups
+on mt7986b, you can only use those groups on mt7986a.
+
+ Valid value function pins (in pin#)
+ -------------------------------------------------------------------------
+ "watchdog" "watchdog" 0
+ "wifi_led" "led" 1, 2
+ "i2c" "i2c" 3, 4
+ "uart1_0" "uart" 7, 8, 9, 10
+ "pcie_clk" "pcie" 9
+ "pcie_wake" "pcie" 10
+ "spi1_0" "spi" 11, 12, 13, 14
+ "pwm1_1" "pwm" 20,
+ "pwm0" "pwm" 21,
+ "pwm1_0" "pwm" 22,
+ "snfi" "flash" 23, 24, 25, 26, 27, 28
+ "spi1_2" "spi" 29, 30, 31, 32
+ "emmc_45" "emmc" 22, 23, 24, 25, 26, 27,
+ 28, 29, 30, 31, 32
+ "spi1_1" "spi" 23, 24, 25, 26
+ "uart1_2" "uart" 29, 30, 31, 32
+ "uart1_1" "uart" 23, 24, 25, 26
+ "uart2_0" "uart" 29, 30, 31, 32
+ "spi0" "spi" 33, 34, 35, 36
+ "spi0_wp_hold" "spi" 37, 38
+ "uart1_3_rx_tx" "uart" 35, 36
+ "uart1_3_cts_rts" "uart" 37, 38
+ "uart2_1" "uart" 33, 34, 35, 36
+ "spi1_3" "spi" 33, 34, 35, 36
+ "uart0" "uart" 39, 40
+ "pcie_pereset" "pcie" 41
+ "uart1" "uart" 42, 43, 44, 45
+ "uart2" "uart" 46, 47, 48, 49
+ "emmc_51" "emmc" 50, 51, 52, 53, 54, 55,
+ 56, 57, 57, 59, 60, 61
+ "pcm" "audio" 62, 63, 64, 65
+ "i2s" "audio" 62, 63, 64, 65
+ "switch_int" "eth" 66
+ "mdc_mdio" "eth" 67
+
+Example:
+
+{
+ pio: pinctrl@1001f000 {
+ compatible = "mediatek,mt7986a-pinctrl";
+ reg = <0 0x1001f000 0 0x1000>,
+ <0 0x11c30000 0 0x1000>,
+ <0 0x11c40000 0 0x1000>,
+ <0 0x11e20000 0 0x1000>,
+ <0 0x11e30000 0 0x1000>,
+ <0 0x11f00000 0 0x1000>,
+ <0 0x11f10000 0 0x1000>,
+ <0 0x1000b000 0 0x1000>;
+ reg-names = "gpio_base", "iocfg_rt_base", "iocfg_rb_base",
+ "iocfg_lt_base", "iocfg_lb_base", "iocfg_tr_base",
+ "iocfg_tl_base", "eint";
+ gpio-controller;
+ #gpio-cells = <2>;
+ gpio-ranges = <&pio 0 0 100>;
+ interrupt-controller;
+ interrupts = <GIC_SPI 225 IRQ_TYPE_LEVEL_HIGH>;
+ interrupt-parent = <&gic>;
+ #interrupt-cells = <2>;
+
+ uart1_pins: uart1-pins-42-to-45 {
+ mux {
+ function = "uart";
+ groups = "uart1";
+ };
+ };
+
+ uart2_pins: uart1-pins-46-to-49 {
+ mux {
+ function = "uart";
+ groups = "uart2";
+ };
+ };
+ ...
+ };
+}
--
2.29.2