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| Broadcom BCM281xx Pin Controller
|
| This is a pin controller for the Broadcom BCM281xx SoC family, which includes
| BCM11130, BCM11140, BCM11351, BCM28145, and BCM28155 SoCs.
|
| === Pin Controller Node ===
|
| Required Properties:
|
| - compatible: Must be "brcm,bcm11351-pinctrl"
| - reg: Base address of the PAD Controller register block and the size
| of the block.
|
| For example, the following is the bare minimum node:
|
| pinctrl@35004800 {
| compatible = "brcm,bcm11351-pinctrl";
| reg = <0x35004800 0x430>;
| };
|
| As a pin controller device, in addition to the required properties, this node
| should also contain the pin configuration nodes that client devices reference,
| if any.
|
| === Pin Configuration Node ===
|
| Each pin configuration node is a sub-node of the pin controller node and is a
| container of an arbitrary number of subnodes, called pin group nodes in this
| document.
|
| Please refer to the pinctrl-bindings.txt in this directory for details of the
| common pinctrl bindings used by client devices, including the definition of a
| "pin configuration node".
|
| === Pin Group Node ===
|
| A pin group node specifies the desired pin mux and/or pin configuration for an
| arbitrary number of pins. The name of the pin group node is optional and not
| used.
|
| A pin group node only affects the properties specified in the node, and has no
| effect on any properties that are omitted.
|
| The pin group node accepts a subset of the generic pin config properties. For
| details generic pin config properties, please refer to pinctrl-bindings.txt
| and <include/linux/pinctrl/pinconfig-generic.h>.
|
| Each pin controlled by this pin controller belong to one of three types:
| Standard, I2C, and HDMI. Each type accepts a different set of pin config
| properties. A list of pins and their types is provided below.
|
| Required Properties (applicable to all pins):
|
| - pins: Multiple strings. Specifies the name(s) of one or more pins to
| be configured by this node.
|
| Optional Properties (for standard pins):
|
| - function: String. Specifies the pin mux selection. Values
| must be one of: "alt1", "alt2", "alt3", "alt4"
| - input-schmitt-enable: No arguments. Enable schmitt-trigger mode.
| - input-schmitt-disable: No arguments. Disable schmitt-trigger mode.
| - bias-pull-up: No arguments. Pull up on pin.
| - bias-pull-down: No arguments. Pull down on pin.
| - bias-disable: No arguments. Disable pin bias.
| - slew-rate: Integer. Meaning depends on configured pin mux:
| *_SCL or *_SDA:
| 0: Standard(100kbps)& Fast(400kbps) mode
| 1: Highspeed (3.4Mbps) mode
| IC_DM or IC_DP:
| 0: normal slew rate
| 1: fast slew rate
| Otherwise:
| 0: fast slew rate
| 1: normal slew rate
| - input-enable: No arguments. Enable input (does not affect
| output.)
| - input-disable: No arguments. Disable input (does not affect
| output.)
| - drive-strength: Integer. Drive strength in mA. Valid values are
| 2, 4, 6, 8, 10, 12, 14, 16 mA.
|
| Optional Properties (for I2C pins):
|
| - function: String. Specifies the pin mux selection. Values
| must be one of: "alt1", "alt2", "alt3", "alt4"
| - bias-pull-up: Integer. Pull up strength in Ohm. There are 3
| pull-up resisitors (1.2k, 1.8k, 2.7k) available
| in parallel for I2C pins, so the valid values
| are: 568, 720, 831, 1080, 1200, 1800, 2700 Ohm.
| - bias-disable: No arguments. Disable pin bias.
| - slew-rate: Integer. Meaning depends on configured pin mux:
| *_SCL or *_SDA:
| 0: Standard(100kbps)& Fast(400kbps) mode
| 1: Highspeed (3.4Mbps) mode
| IC_DM or IC_DP:
| 0: normal slew rate
| 1: fast slew rate
| Otherwise:
| 0: fast slew rate
| 1: normal slew rate
| - input-enable: No arguments. Enable input (does not affect
| output.)
| - input-disable: No arguments. Disable input (does not affect
| output.)
|
| Optional Properties (for HDMI pins):
|
| - function: String. Specifies the pin mux selection. Values
| must be one of: "alt1", "alt2", "alt3", "alt4"
| - slew-rate: Integer. Controls slew rate.
| 0: Standard(100kbps)& Fast(400kbps) mode
| 1: Highspeed (3.4Mbps) mode
| - input-enable: No arguments. Enable input (does not affect
| output.)
| - input-disable: No arguments. Disable input (does not affect
| output.)
|
| Example:
| // pin controller node
| pinctrl@35004800 {
| compatible = "brcm,bcm11351-pinctrl";
| reg = <0x35004800 0x430>;
|
| // pin configuration node
| dev_a_default: dev_a_active {
| //group node defining 1 standard pin
| grp_1 {
| pins = "std_pin1";
| function = "alt1";
| input-schmitt-enable;
| bias-disable;
| slew-rate = <1>;
| drive-strength = <4>;
| };
|
| // group node defining 2 I2C pins
| grp_2 {
| pins = "i2c_pin1", "i2c_pin2";
| function = "alt2";
| bias-pull-up = <720>;
| input-enable;
| };
|
| // group node defining 2 HDMI pins
| grp_3 {
| pins = "hdmi_pin1", "hdmi_pin2";
| function = "alt3";
| slew-rate = <1>;
| };
|
| // other pin group nodes
| ...
| };
|
| // other pin configuration nodes
| ...
| };
|
| In the example above, "dev_a_active" is a pin configuration node with a number
| of sub-nodes. In the pin group node "grp_1", one pin, "std_pin1", is defined in
| the "pins" property. Thus, the remaining properties in the "grp_1" node applies
| only to this pin, including the following settings:
| - setting pinmux to "alt1"
| - enabling schmitt-trigger (hystersis) mode
| - disabling pin bias
| - setting the slew-rate to 1
| - setting the drive strength to 4 mA
| Note that neither "input-enable" nor "input-disable" was specified - the pinctrl
| subsystem will therefore leave this property unchanged from whatever state it
| was in before applying these changes.
|
| The "pins" property in the pin group node "grp_2" specifies two pins -
| "i2c_pin1" and "i2c_pin2"; the remaining properties in this pin group node,
| therefore, applies to both of these pins. The properties include:
| - setting pinmux to "alt2"
| - setting pull-up resistance to 720 Ohm (ie. enabling 1.2k and 1.8k resistors
| in parallel)
| - enabling both pins' input
| "slew-rate" is not specified in this pin group node, so the slew-rate for these
| pins are left as-is.
|
| Finally, "grp_3" defines two HDMI pins. The following properties are applied to
| both pins:
| - setting pinmux to "alt3"
| - setting slew-rate to 1; for HDMI pins, this corresponds to the 3.4 Mbps
| Highspeed mode
| The input is neither enabled or disabled, and is left untouched.
|
| === Pin Names and Type ===
|
| The following are valid pin names and their pin types:
|
| "adcsync", Standard
| "bat_rm", Standard
| "bsc1_scl", I2C
| "bsc1_sda", I2C
| "bsc2_scl", I2C
| "bsc2_sda", I2C
| "classgpwr", Standard
| "clk_cx8", Standard
| "clkout_0", Standard
| "clkout_1", Standard
| "clkout_2", Standard
| "clkout_3", Standard
| "clkreq_in_0", Standard
| "clkreq_in_1", Standard
| "cws_sys_req1", Standard
| "cws_sys_req2", Standard
| "cws_sys_req3", Standard
| "digmic1_clk", Standard
| "digmic1_dq", Standard
| "digmic2_clk", Standard
| "digmic2_dq", Standard
| "gpen13", Standard
| "gpen14", Standard
| "gpen15", Standard
| "gpio00", Standard
| "gpio01", Standard
| "gpio02", Standard
| "gpio03", Standard
| "gpio04", Standard
| "gpio05", Standard
| "gpio06", Standard
| "gpio07", Standard
| "gpio08", Standard
| "gpio09", Standard
| "gpio10", Standard
| "gpio11", Standard
| "gpio12", Standard
| "gpio13", Standard
| "gpio14", Standard
| "gps_pablank", Standard
| "gps_tmark", Standard
| "hdmi_scl", HDMI
| "hdmi_sda", HDMI
| "ic_dm", Standard
| "ic_dp", Standard
| "kp_col_ip_0", Standard
| "kp_col_ip_1", Standard
| "kp_col_ip_2", Standard
| "kp_col_ip_3", Standard
| "kp_row_op_0", Standard
| "kp_row_op_1", Standard
| "kp_row_op_2", Standard
| "kp_row_op_3", Standard
| "lcd_b_0", Standard
| "lcd_b_1", Standard
| "lcd_b_2", Standard
| "lcd_b_3", Standard
| "lcd_b_4", Standard
| "lcd_b_5", Standard
| "lcd_b_6", Standard
| "lcd_b_7", Standard
| "lcd_g_0", Standard
| "lcd_g_1", Standard
| "lcd_g_2", Standard
| "lcd_g_3", Standard
| "lcd_g_4", Standard
| "lcd_g_5", Standard
| "lcd_g_6", Standard
| "lcd_g_7", Standard
| "lcd_hsync", Standard
| "lcd_oe", Standard
| "lcd_pclk", Standard
| "lcd_r_0", Standard
| "lcd_r_1", Standard
| "lcd_r_2", Standard
| "lcd_r_3", Standard
| "lcd_r_4", Standard
| "lcd_r_5", Standard
| "lcd_r_6", Standard
| "lcd_r_7", Standard
| "lcd_vsync", Standard
| "mdmgpio0", Standard
| "mdmgpio1", Standard
| "mdmgpio2", Standard
| "mdmgpio3", Standard
| "mdmgpio4", Standard
| "mdmgpio5", Standard
| "mdmgpio6", Standard
| "mdmgpio7", Standard
| "mdmgpio8", Standard
| "mphi_data_0", Standard
| "mphi_data_1", Standard
| "mphi_data_2", Standard
| "mphi_data_3", Standard
| "mphi_data_4", Standard
| "mphi_data_5", Standard
| "mphi_data_6", Standard
| "mphi_data_7", Standard
| "mphi_data_8", Standard
| "mphi_data_9", Standard
| "mphi_data_10", Standard
| "mphi_data_11", Standard
| "mphi_data_12", Standard
| "mphi_data_13", Standard
| "mphi_data_14", Standard
| "mphi_data_15", Standard
| "mphi_ha0", Standard
| "mphi_hat0", Standard
| "mphi_hat1", Standard
| "mphi_hce0_n", Standard
| "mphi_hce1_n", Standard
| "mphi_hrd_n", Standard
| "mphi_hwr_n", Standard
| "mphi_run0", Standard
| "mphi_run1", Standard
| "mtx_scan_clk", Standard
| "mtx_scan_data", Standard
| "nand_ad_0", Standard
| "nand_ad_1", Standard
| "nand_ad_2", Standard
| "nand_ad_3", Standard
| "nand_ad_4", Standard
| "nand_ad_5", Standard
| "nand_ad_6", Standard
| "nand_ad_7", Standard
| "nand_ale", Standard
| "nand_cen_0", Standard
| "nand_cen_1", Standard
| "nand_cle", Standard
| "nand_oen", Standard
| "nand_rdy_0", Standard
| "nand_rdy_1", Standard
| "nand_wen", Standard
| "nand_wp", Standard
| "pc1", Standard
| "pc2", Standard
| "pmu_int", Standard
| "pmu_scl", I2C
| "pmu_sda", I2C
| "rfst2g_mtsloten3g", Standard
| "rgmii_0_rx_ctl", Standard
| "rgmii_0_rxc", Standard
| "rgmii_0_rxd_0", Standard
| "rgmii_0_rxd_1", Standard
| "rgmii_0_rxd_2", Standard
| "rgmii_0_rxd_3", Standard
| "rgmii_0_tx_ctl", Standard
| "rgmii_0_txc", Standard
| "rgmii_0_txd_0", Standard
| "rgmii_0_txd_1", Standard
| "rgmii_0_txd_2", Standard
| "rgmii_0_txd_3", Standard
| "rgmii_1_rx_ctl", Standard
| "rgmii_1_rxc", Standard
| "rgmii_1_rxd_0", Standard
| "rgmii_1_rxd_1", Standard
| "rgmii_1_rxd_2", Standard
| "rgmii_1_rxd_3", Standard
| "rgmii_1_tx_ctl", Standard
| "rgmii_1_txc", Standard
| "rgmii_1_txd_0", Standard
| "rgmii_1_txd_1", Standard
| "rgmii_1_txd_2", Standard
| "rgmii_1_txd_3", Standard
| "rgmii_gpio_0", Standard
| "rgmii_gpio_1", Standard
| "rgmii_gpio_2", Standard
| "rgmii_gpio_3", Standard
| "rtxdata2g_txdata3g1", Standard
| "rtxen2g_txdata3g2", Standard
| "rxdata3g0", Standard
| "rxdata3g1", Standard
| "rxdata3g2", Standard
| "sdio1_clk", Standard
| "sdio1_cmd", Standard
| "sdio1_data_0", Standard
| "sdio1_data_1", Standard
| "sdio1_data_2", Standard
| "sdio1_data_3", Standard
| "sdio4_clk", Standard
| "sdio4_cmd", Standard
| "sdio4_data_0", Standard
| "sdio4_data_1", Standard
| "sdio4_data_2", Standard
| "sdio4_data_3", Standard
| "sim_clk", Standard
| "sim_data", Standard
| "sim_det", Standard
| "sim_resetn", Standard
| "sim2_clk", Standard
| "sim2_data", Standard
| "sim2_det", Standard
| "sim2_resetn", Standard
| "sri_c", Standard
| "sri_d", Standard
| "sri_e", Standard
| "ssp_extclk", Standard
| "ssp0_clk", Standard
| "ssp0_fs", Standard
| "ssp0_rxd", Standard
| "ssp0_txd", Standard
| "ssp2_clk", Standard
| "ssp2_fs_0", Standard
| "ssp2_fs_1", Standard
| "ssp2_fs_2", Standard
| "ssp2_fs_3", Standard
| "ssp2_rxd_0", Standard
| "ssp2_rxd_1", Standard
| "ssp2_txd_0", Standard
| "ssp2_txd_1", Standard
| "ssp3_clk", Standard
| "ssp3_fs", Standard
| "ssp3_rxd", Standard
| "ssp3_txd", Standard
| "ssp4_clk", Standard
| "ssp4_fs", Standard
| "ssp4_rxd", Standard
| "ssp4_txd", Standard
| "ssp5_clk", Standard
| "ssp5_fs", Standard
| "ssp5_rxd", Standard
| "ssp5_txd", Standard
| "ssp6_clk", Standard
| "ssp6_fs", Standard
| "ssp6_rxd", Standard
| "ssp6_txd", Standard
| "stat_1", Standard
| "stat_2", Standard
| "sysclken", Standard
| "traceclk", Standard
| "tracedt00", Standard
| "tracedt01", Standard
| "tracedt02", Standard
| "tracedt03", Standard
| "tracedt04", Standard
| "tracedt05", Standard
| "tracedt06", Standard
| "tracedt07", Standard
| "tracedt08", Standard
| "tracedt09", Standard
| "tracedt10", Standard
| "tracedt11", Standard
| "tracedt12", Standard
| "tracedt13", Standard
| "tracedt14", Standard
| "tracedt15", Standard
| "txdata3g0", Standard
| "txpwrind", Standard
| "uartb1_ucts", Standard
| "uartb1_urts", Standard
| "uartb1_urxd", Standard
| "uartb1_utxd", Standard
| "uartb2_urxd", Standard
| "uartb2_utxd", Standard
| "uartb3_ucts", Standard
| "uartb3_urts", Standard
| "uartb3_urxd", Standard
| "uartb3_utxd", Standard
| "uartb4_ucts", Standard
| "uartb4_urts", Standard
| "uartb4_urxd", Standard
| "uartb4_utxd", Standard
| "vc_cam1_scl", I2C
| "vc_cam1_sda", I2C
| "vc_cam2_scl", I2C
| "vc_cam2_sda", I2C
| "vc_cam3_scl", I2C
| "vc_cam3_sda", I2C
|
|
