xref: /openbmc/linux/Documentation/devicetree/bindings/pinctrl/actions,s700-pinctrl.txt (revision 597473720f4dc69749542bfcfed4a927a43d935e)

Actions Semi S700 Pin Controller

This binding describes the pin controller found in the S700 SoC.

Required Properties:

- compatible:   Should be "actions,s700-pinctrl"
- reg:          Should contain the register base address and size of
		the pin controller.
- clocks:       phandle of the clock feeding the pin controller
- gpio-controller: Marks the device node as a GPIO controller.
- gpio-ranges: Specifies the mapping between gpio controller and
               pin-controller pins.
- #gpio-cells: Should be two. The first cell is the gpio pin number
		and the second cell is used for optional parameters.
- interrupt-controller: Marks the device node as an interrupt controller.
- #interrupt-cells: Specifies the number of cells needed to encode an
		interrupt.  Shall be set to 2.  The first cell
		defines the interrupt number, the second encodes
		the trigger flags described in
		bindings/interrupt-controller/interrupts.txt
- interrupts: The interrupt outputs from the controller. There is one GPIO
              interrupt per GPIO bank. The number of interrupts listed depends
              on the number of GPIO banks on the SoC. The interrupts must be
              ordered by bank, starting with bank 0.

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".

The 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 group(s), and various pin configuration
parameters, such as pull-up, drive strength, etc.

PIN CONFIGURATION NODES:

The name of each subnode is not important; all subnodes should be enumerated
and processed purely based on their content.

Each subnode only affects those parameters that are explicitly listed. In
other words, a subnode that lists a mux function but no pin configuration
parameters implies no information about any pin configuration parameters.
Similarly, a pin subnode that describes a pullup parameter implies no
information about e.g. the mux function.

Pinmux functions are available only for the pin groups while pinconf
parameters are available for both pin groups and individual pins.

The following generic properties as defined in pinctrl-bindings.txt are valid
to specify in a pin configuration subnode:

Required Properties:

- pins:		An array of strings, each string containing the name of a pin.
		These pins are used for selecting the pull control and schmitt
		trigger parameters. The following are the list of pins
		available:

		eth_txd0, eth_txd1, eth_txd2, eth_txd3, eth_txen, eth_rxer,
		eth_crs_dv, eth_rxd1, eth_rxd0, eth_rxd2, eth_rxd3, eth_ref_clk,
		eth_mdc, eth_mdio, sirq0, sirq1, sirq2, i2s_d0, i2s_bclk0,
		i2s_lrclk0, i2s_mclk0, i2s_d1, i2s_bclk1, i2s_lrclk1, i2s_mclk1,
		pcm1_in, pcm1_clk, pcm1_sync, pcm1_out, ks_in0, ks_in1, ks_in2,
		ks_in3, ks_out0, ks_out1, ks_out2, lvds_oep, lvds_oen, lvds_odp,
		lvds_odn, lvds_ocp, lvds_ocn, lvds_obp, lvds_obn, lvds_oap,
		lvds_oan, lvds_eep, lvds_een, lvds_edp, lvds_edn, lvds_ecp,
		lvds_ecn, lvds_ebp, lvds_ebn, lvds_eap, lvds_ean, lcd0_d18,
		lcd0_d2, dsi_dp3, dsi_dn3, dsi_dp1, dsi_dn1, dsi_cp, dsi_cn,
		dsi_dp0, dsi_dn0, dsi_dp2, dsi_dn2, sd0_d0, sd0_d1, sd0_d2,
		sd0_d3, sd1_d0, sd1_d1, sd1_d2, sd1_d3, sd0_cmd, sd0_clk,
		sd1_cmd, sd1_clk, spi0_ss, spi0_miso, uart0_rx, uart0_tx,
		uart2_rx, uart2_tx, uart2_rtsb, uart2_ctsb, uart3_rx, uart3_tx,
		uart3_rtsb, uart3_ctsb, i2c0_sclk, i2c0_sdata, i2c1_sclk,
		i2c1_sdata, i2c2_sdata, csi_dn0, csi_dp0, csi_dn1, csi_dp1,
		csi_cn, csi_cp, csi_dn2, csi_dp2, csi_dn3, csi_dp3,
		sensor0_pclk, sensor0_ckout, dnand_d0, dnand_d1, dnand_d2,
		dnand_d3, dnand_d4, dnand_d5, dnand_d6, dnand_d7, dnand_wrb,
		dnand_rdb, dnand_rdbn, dnand_dqs, dnand_dqsn, dnand_rb0,
		dnand_ale, dnand_cle, dnand_ceb0, dnand_ceb1, dnand_ceb2,
		dnand_ceb3, porb, clko_25m, bsel, pkg0, pkg1, pkg2, pkg3

- groups:       An array of strings, each string containing the name of a pin
                group. These pin groups are used for selecting the pinmux
                functions.
		rgmii_txd23_mfp, rgmii_rxd2_mfp, rgmii_rxd3_mfp, lcd0_d18_mfp,
		rgmii_txd01_mfp, rgmii_txd0_mfp, rgmii_txd1_mfp, rgmii_txen_mfp,
		rgmii_rxen_mfp, rgmii_rxd1_mfp, rgmii_rxd0_mfp, rgmii_ref_clk_mfp,
		i2s_d0_mfp, i2s_pcm1_mfp, i2s0_pcm0_mfp, i2s1_pcm0_mfp,
		i2s_d1_mfp, ks_in2_mfp, ks_in1_mfp, ks_in0_mfp, ks_in3_mfp,
		ks_out0_mfp, ks_out1_mfp, ks_out2_mfp, lvds_o_pn_mfp, dsi_dn0_mfp,
		dsi_dp2_mfp, lcd0_d2_mfp, dsi_dp3_mfp, dsi_dn3_mfp, dsi_dp0_mfp,
		lvds_ee_pn_mfp, uart2_rx_tx_mfp, spi0_i2c_pcm_mfp, dsi_dnp1_cp_d2_mfp,
		dsi_dnp1_cp_d17_mfp, lvds_e_pn_mfp, dsi_dn2_mfp, uart2_rtsb_mfp,
		uart2_ctsb_mfp, uart3_rtsb_mfp, uart3_ctsb_mfp, sd0_d0_mfp, sd0_d1_mfp,
		sd0_d2_d3_mfp, sd1_d0_d3_mfp, sd0_cmd_mfp, sd0_clk_mfp, sd1_cmd_mfp,
		uart0_rx_mfp, clko_25m_mfp, csi_cn_cp_mfp, sens0_ckout_mfp, uart0_tx_mfp,
		i2c0_mfp, csi_dn_dp_mfp, sen0_pclk_mfp, pcm1_in_mfp, pcm1_clk_mfp,
		pcm1_sync_mfp, pcm1_out_mfp, dnand_data_wr_mfp, dnand_acle_ce0_mfp,
		nand_ceb2_mfp, nand_ceb3_mfp

		These pin groups are used for selecting the drive strength
		parameters.

		sirq_drv, rgmii_txd23_drv, rgmii_rxd23_drv, rgmii_txd01_txen_drv,
		rgmii_rxer_drv, rgmii_crs_drv, rgmii_rxd10_drv, rgmii_ref_clk_drv,
		smi_mdc_mdio_drv, i2s_d0_drv, i2s_bclk0_drv, i2s3_drv, i2s13_drv,
		pcm1_drv, ks_in_drv, ks_out_drv, lvds_all_drv, lcd_d18_d2_drv,
		dsi_all_drv, sd0_d0_d3_drv, sd0_cmd_drv, sd0_clk_drv, spi0_all_drv,
		uart0_rx_drv, uart0_tx_drv, uart2_all_drv, i2c0_all_drv, i2c12_all_drv,
		sens0_pclk_drv, sens0_ckout_drv, uart3_all_drv

- function:	An array of strings, each string containing the name of the
		pinmux functions. These functions can only be selected by
		the corresponding pin groups. The following are the list of
		pinmux functions available:

		nor, eth_rgmii, eth_sgmii, spi0, spi1, spi2, spi3, seNs0, sens1,
		uart0, uart1, uart2, uart3, uart4, uart5, uart6, i2s0, i2s1,
		pcm1, pcm0, ks, jtag, pwm0, pwm1, pwm2, pwm3, pwm4, pwm5, p0,
		sd0, sd1, sd2, i2c0, i2c1, i2c2, i2c3, dsi, lvds, usb30,
		clko_25m, mipi_csi, nand, spdif, sirq0, sirq1, sirq2, bt, lcd0

Optional Properties:

- bias-pull-down: No arguments. The specified pins should be configured as
		pull down.
- bias-pull-up:   No arguments. The specified pins should be configured as
		pull up.
- input-schmitt-enable: No arguments: Enable schmitt trigger for the specified
		pins
- input-schmitt-disable: No arguments: Disable schmitt trigger for the specified
		pins
- drive-strength: Integer. Selects the drive strength for the specified
		pins in mA.
		Valid values are:
		<2>
		<4>
		<8>
		<12>

Example:

	pinctrl: pinctrl@e01b0000 {
		compatible = "actions,s700-pinctrl";
		reg = <0x0 0xe01b0000 0x0 0x1000>;
		clocks = <&cmu CLK_GPIO>;
		gpio-controller;
		gpio-ranges = <&pinctrl 0 0 136>;
		#gpio-cells = <2>;
		interrupt-controller;
		#interrupt-cells = <2>;
                interrupts = <GIC_SPI 36 IRQ_TYPE_LEVEL_HIGH>,
                             <GIC_SPI 37 IRQ_TYPE_LEVEL_HIGH>,
                             <GIC_SPI 38 IRQ_TYPE_LEVEL_HIGH>,
                             <GIC_SPI 39 IRQ_TYPE_LEVEL_HIGH>,
                             <GIC_SPI 40 IRQ_TYPE_LEVEL_HIGH>;

		uart3-default: uart3-default {
			pinmux {
				groups = "uart3_rtsb_mfp", "uart3_ctsb_mfp";
				function = "uart3";
			};
			pinconf {
				groups = "uart3_all_drv";
				drive-strength = <2>;
			};
		};
	};