projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| d2d13ed0 YRDR |
1 | Broadcom Northstar2 IOMUX Controller |
| 2 | ||
| 3 | The Northstar2 IOMUX controller supports group based mux configuration. There | |
| 4 | are some individual pins that support modifying the pinconf parameters. | |
| 5 | ||
| 6 | Required properties: | |
| 7 | ||
| 8 | - compatible: | |
| 9 | Must be "brcm,ns2-pinmux" | |
| 10 | ||
| 11 | - reg: | |
| 12 | Define the base and range of the I/O address space that contains the | |
| 13 | Northstar2 IOMUX and pin configuration registers. | |
| 14 | ||
| 15 | Properties in sub nodes: | |
| 16 | ||
| 17 | - function: | |
| 18 | The mux function to select | |
| 19 | ||
| 20 | - groups: | |
| 21 | The list of groups to select with a given function | |
| 22 | ||
| 23 | - pins: | |
| 24 | List of pin names to change configuration | |
| 25 | ||
| 26 | The generic properties bias-disable, bias-pull-down, bias-pull-up, | |
| 27 | drive-strength, slew-rate, input-enable, input-disable are supported | |
| 28 | for some individual pins listed at the end. | |
| 29 | ||
| 30 | For more details, refer to | |
| 31 | Documentation/devicetree/bindings/pinctrl/pinctrl-bindings.txt | |
| 32 | ||
| 33 | For example: | |
| 34 | ||
| 35 | pinctrl: pinctrl@6501d130 { | |
| 36 | compatible = "brcm,ns2-pinmux"; | |
| 37 | reg = <0x6501d130 0x08>, | |
| 38 | <0x660a0028 0x04>, | |
| 39 | <0x660009b0 0x40>; | |
| 40 | ||
| 41 | pinctrl-names = "default"; | |
| 42 | pinctrl-0 = <&nand_sel &uart3_rx &sdio0_d4>; | |
| 43 | ||
| 44 | /* Select nand function */ | |
| 45 | nand_sel: nand_sel { | |
| 46 | function = "nand"; | |
| 47 | groups = "nand_grp"; | |
| 48 | }; | |
| 49 | ||
| 50 | /* Pull up the uart3 rx pin */ | |
| 51 | uart3_rx: uart3_rx { | |
| 52 | pins = "uart3_sin"; | |
| 53 | bias-pull-up; | |
| 54 | }; | |
| 55 | ||
| 56 | /* Set the drive strength of sdio d4 pin */ | |
| 57 | sdio0_d4: sdio0_d4 { | |
| 58 | pins = "sdio0_data4"; | |
| 59 | drive-strength = <8>; | |
| 60 | }; | |
| 61 | }; | |
| 62 | ||
| 63 | List of supported functions and groups in Northstar2: | |
| 64 | ||
| 65 | "nand": "nand_grp" | |
| 66 | ||
| 67 | "nor": "nor_data_grp", "nor_adv_grp", "nor_addr_0_3_grp", "nor_addr_4_5_grp", | |
| 68 | "nor_addr_6_7_grp", "nor_addr_8_9_grp", "nor_addr_10_11_grp", | |
| 69 | "nor_addr_12_15_grp" | |
| 70 | ||
| 71 | "gpio": "gpio_0_1_grp", "gpio_2_5_grp", "gpio_6_7_grp", "gpio_8_9_grp", | |
| 72 | "gpio_10_11_grp", "gpio_12_13_grp", "gpio_14_17_grp", "gpio_18_19_grp", | |
| 73 | "gpio_20_21_grp", "gpio_22_23_grp", "gpio_24_25_grp", "gpio_26_27_grp", | |
| 74 | "gpio_28_29_grp", "gpio_30_31_grp" | |
| 75 | ||
| 76 | "pcie": "pcie_ab1_clk_wak_grp", "pcie_a3_clk_wak_grp", "pcie_b3_clk_wak_grp", | |
| 77 | "pcie_b2_clk_wak_grp", "pcie_a2_clk_wak_grp" | |
| 78 | ||
| 79 | "uart0": "uart0_modem_grp", "uart0_rts_cts_grp", "uart0_in_out_grp" | |
| 80 | ||
| 81 | "uart1": "uart1_ext_clk_grp", "uart1_dcd_dsr_grp", "uart1_ri_dtr_grp", | |
| 82 | "uart1_rts_cts_grp", "uart1_in_out_grp" | |
| 83 | ||
| 84 | "uart2": "uart2_rts_cts_grp" | |
| 85 | ||
| 86 | "pwm": "pwm_0_grp", "pwm_1_grp", "pwm_2_grp", "pwm_3_grp" | |
| 87 | ||
| 88 | ||
| 89 | List of pins that support pinconf parameters: | |
| 90 | ||
| 91 | "qspi_wp", "qspi_hold", "qspi_cs", "qspi_sck", "uart3_sin", "uart3_sout", | |
| 92 | "qspi_mosi", "qspi_miso", "spi0_fss", "spi0_rxd", "spi0_txd", "spi0_sck", | |
| 93 | "spi1_fss", "spi1_rxd", "spi1_txd", "spi1_sck", "sdio0_data7", | |
| 94 | "sdio0_emmc_rst", "sdio0_led_on", "sdio0_wp", "sdio0_data3", "sdio0_data4", | |
| 95 | "sdio0_data5", "sdio0_data6", "sdio0_cmd", "sdio0_data0", "sdio0_data1", | |
| 96 | "sdio0_data2", "sdio1_led_on", "sdio1_wp", "sdio0_cd_l", "sdio0_clk", | |
| 97 | "sdio1_data5", "sdio1_data6", "sdio1_data7", "sdio1_emmc_rst", "sdio1_data1", | |
| 98 | "sdio1_data2", "sdio1_data3", "sdio1_data4", "sdio1_cd_l", "sdio1_clk", | |
| 99 | "sdio1_cmd", "sdio1_data0", "ext_mdio_0", "ext_mdc_0", "usb3_p1_vbus_ppc", | |
| 100 | "usb3_p1_overcurrent", "usb3_p0_vbus_ppc", "usb3_p0_overcurrent", | |
| 101 | "usb2_presence_indication", "usb2_vbus_present", "usb2_vbus_ppc", | |
| 102 | "usb2_overcurrent", "sata_led1", "sata_led0" |