The aim of this document is to explain how to setup pins of SP7350 in device-tree source. SP7350 has 106 general purpose IO (GPIO) pins which are multiplexed with other special functions, like eMMC device, SPI-NOR flash, SPI-NAND flash, Ethernet PHY (RGMII or RMII interface), UART, I2C pins, and etc.
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GPIO # | Power domain | Type | Pin name | Power-supply |
0 - 19 | Main | 1.8V GPIO | G_MX0 - G_MX19 | VDDPST18_GPIO |
20 | 1.8V/3.0V DVIO | G_MX20 | VDDPST3018_DVIO_2 | |
21 - 27 | G_MX21 - G_MX27 | VDDPST3018_DVIO_1 | ||
28 - 37 | G_MX28 - G_MX37 | VDDPST3018_DVIO_2 | ||
38 - 43 | G_MX38 - G_MX43 | AVDDIO_3018_SD | ||
44 - 49 | G_MX44 - G_MX49 | AVDDIO_3018_SDIO | ||
50 - 59 | CM4 (AO) | AO_MX0 - AO_MX9 | VDDPST3018_DVIO_AO_1 | |
60 - 69 | AO_MX10 - AO_MX19 | VDDPST3018_DVIO_AO_2 | ||
70 - 79 | AO_MX20 - AO_MX29 | VDDPST3018_DVIO_AO_3 | ||
80 - 98 | 1.8V GPIO | AO_MX30 - AO_MX48 | VDDPST18_GPIO_AO | |
99 - 105 | IV_MX0 - IV_MX6 |
Voltage Mode Select
Beyond configuring the 1.8V or 3.0V power to supply pins of a DVIO group in circuit boards (hardware), setting up the voltage mode select (ms control) control-bits is crucial for the normal operation of IO pins. The following properties configure voltage mode select control-bits in the Device Tree Source (DTS) file:
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| Code Block | ||
|---|---|---|
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u3phy0: uphy@f80bd000 {
:
:
pinctrl-names = "default";
pinctrl-0 = <&typec_pins, &extra_gpio_pins>;
typec-gpios = <&pctl 98 GPIO_ACTIVE_HIGH>;
:
:
}; |
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