Pinout_UP_Core_Plus

Pin Map (100-pin header)

Linux GPIO	Description	Pin	Pin	Description	Linux GPIO
	5V	01	02	5V
	5V	03	04	5V
	5V	05	06	5V
	5V	07	08	5V
	Ground	09	10	Ground
349	PMU_RSTBTN_N	11	12	LPSS_UART1_RTS	478
348	PMU_PWRBTN_N	13	14	LPSS_UART1_CTS	479
350	PM_SLP_S3#_3P3	15	16	LPSS_UART1_TXD	477
339	PCIE_CLKREQ3#	17	18	LPSS_UART1_RXD	476
270	PCIE_WAKE3_N	19	20	Ground
	Ground	21	22	CPU_prog_JTAG_TDO	459
422	SIO_SPI_0_TXD	23	24	CPU_prog_JTAG_TMS	458
421	SIO_SPI_0_RXD	25	26	HDMI1_CEC_D	455
418	SIO_SPI_0_CLK	27	28	CPU_prog_JTAG_TCK	457
419	SIO_SPI_0_FS0	29	30	CPU_prog_JTAG_TDI	456
420	SIO_SPI_0_FS1	31	32	ISH_GPIO_0	326
	Ground	33	34	ISH_GPIO_1	327
304	LPC_R_AD0	35	36	ISH_GPIO_2	328
305	LPC_R_AD1	37	38	ISH_GPIO_3	329
306	LPC_R_AD2	39	40	ISH_GPIO_4	330
307	LPC_R_AD3	41	42	ISH_GPIO_5	331
	Ground	43	44	ISH_GPIO_6	332
401	AVS_I2S2_MCLK	45	46	PWM0	474
403	AVS_I2S2_WS_SYNC	47	48	PWM1	475
404	AVS_I2S2_SDI	49	50	Ground
405	AVS_I2S2_SDO	51	52	I2C_SDA6	322
	Ground	53	54	I2C_SCL6	323
	PCIE_P5_USB3_P2_TXP	55	56	Ground
	PCIE_P5_USB3_P2_TXN	57	58	AVS_I2S2_BCLK	402
	Ground	59	60	BT_HOST_WAKE	452
	PCIE_P5_USB3_P2_RXP	61	62	Ground
	PCIE_P5_USB3_P2_RXN	63	64	USB2_DP2
	Ground	65	66	USB2_DN2
	PCIE_REFCLK3_P	67	68	Ground
	PCIE_REFCLK3_N	69	70	nSTATUS	483
	Ground	71	72	Ground
310	I2C_SDA0	73	74	ISH_GPIO_7	333
311	I2C_SCL0	75	76	ISH_GPIO_8	334
	Ground	77	78	ISH_GPIO_9	335
312	I2C_SDA1	79	80	ISH_GPIO_10	462
313	I2C_SCL1	81	82	ISH_GPIO_11	463
	Ground	83	84	ISH_GPIO_12	464
436	GPIO_2	85	86	ISH_GPIO_13	465
437	GPIO_3	87	88	ISH_GPIO_14	466
	Ground	89	90	PMIC_IRQ_N	467
309	LPC_FRAME_R	91	92	FPGA_CLR	439
302	LPC_R_CLKOUT0	93	94	Ground
308	LPC_CLKRU_N	95	96	FPGA_OE	505
301	INT_SERIRQ_R	97	98	FPGA_RST	506
453	CONFIG_SEL	99	100	FPGA_fw_reload	461

SPI Ports

SPI device nodes in Linux can be identified as follows:

 $ ls /sys/bus/pci/devices/0000\:00\:19.*/pxa2xx-spi.*/spi_master/ | grep spi
 /sys/bus/pci/devices/0000:00:19.0/pxa2xx-spi.10/spi_master/:
 spi1
 /sys/bus/pci/devices/0000:00:19.2/pxa2xx-spi.11/spi_master/:
 spi3

Installing ACPI overrides to enable SPI in userspace

By default, no SPI device is created for user access by default. To enable access to SPI from userspace you should add an ACPI override on the kernel

1. Download this zip file and uncompress it

2. Enter in the extracted directory and type in a terminal:
   $ sudo ./install_hooks && sudo acpi-add spidev*

3. Reboot the system

Now you should see the SPI devices under /dev

 $ ls /dev/spi*
 /dev/spidev1.0  /dev/spidev1.1