Enable UART3 and UART5

Should I enable UART3 (/dev/ttymxc2) (pin 47,53) and UART5 (/dev/ttymxc4) (pin 48,49) on Udoo dual CS975REVD BD REVD

I modified the file Kernel_Unico/arch/arm/mach-mx6/board-mx6sdl_seco_UDOO.h of the las Git

disabled:

uart3

// MX6DL_PAD_EIM_D24__GPIO_3_24,
// MX6DL_PAD_EIM_D25__GPIO_3_25
// MX6DL_PAD_EIM_D24__GPIO_MODE,
// MX6DL_PAD_EIM_D25__GPIO_MODE,


uart5

// MX6DL_PAD_KEY_ROW1__GPIO_4_9, // pin 48
// MX6DL_PAD_KEY_COL1__GPIO_4_8, // pin 49
// MX6DL_PAD_KEY_COL1__GPIO_MODE,
// MX6DL_PAD_KEY_ROW1__GPIO_MODE,


enabled:

MX6DL_PAD_EIM_D24__UART3_TXD,
MX6DL_PAD_EIM_D25__UART3_RXD,
MX6DL_PAD_KEY_ROW1__UART5_RXD,
MX6DL_PAD_KEY_COL1__UART5_TXD,



modified the file Kernel_Unico/arch/arm/mach-mx6/board-mx6_seco_UDOO.c

static inline void mx6q_seco_UDOO_init_uart(void) {
imx6q_add_imx_uart(0, NULL);
imx6q_add_imx_uart(1, NULL);
imx6q_add_imx_uart(2, NULL);
imx6q_add_imx_uart(3, NULL);
imx6q_add_imx_uart(4, NULL);
}



at boot shows the following error:

[ 0.582020] > UDOO dual
[ 0.585793] > rev C Called set_gpios_direction
[ 0.590475] Test and set gpios directions and values by Gionji feat. Ekirei test
[ 0.613162] #### FAILED Eported gpio 8. error : -16
[ 0.618173] #### FAILED Eported gpio 7. error : -16


checked with dmesg and setserial


ubuntu@udoo:~$ dmesg | grep tty

[ 1.402802] imx-uart.0: ttymxc0 at MMIO 0x2020000 (irq = 58) is a IMX
[ 1.409832] imx-uart.1: ttymxc1 at MMIO 0x21e8000 (irq = 59) is a IMX
[ 1.416351] console [ttymxc1] enabled, bootconsole disabled
[ 1.428889] imx-uart.2: ttymxc2 at MMIO 0x21ec000 (irq = 60) is a IMX
[ 1.435894] imx-uart.3: ttymxc3 at MMIO 0x21f0000 (irq = 61) is a IMX
[ 1.442793] imx-uart.4: ttymxc4 at MMIO 0x21f4000 (irq = 62) is a IMX


ubuntu@udoo:~$ setserial -g /dev/ttymxc[01234]

/dev/ttymxc0: Permission denied
/dev/ttymxc1: Permission denied
/dev/ttymxc2, UART: undefined, Port: 0x0000, IRQ: 60
/dev/ttymxc3, UART: undefined, Port: 0x0000, IRQ: 61
/dev/ttymxc4, UART: undefined, Port: 0x0000, IRQ: 62


serial ports do not work.

To do some other changes?

Tanks

 

Hello,

The GPIO Errors not new, the GPIO Errors occur for the SPI Bus.

 

I had a similar problem.
/dev/ttymxc2 and /dev/ttymxc4 belonged to root.

Code:

$ ls -al /dev/ttymxc*
crw------- 1 root   root      207, 16 Jun 24 13:43 /dev/ttymxc0
crw------- 1 ubuntu tty       207, 17 Jun 24 14:05 /dev/ttymxc1
crw------- 1 root   root      207, 18 Jun 24 14:00 /dev/ttymxc2
crw-rw-r-- 1 root   intserial 207, 19 Jun 24 13:43 /dev/ttymxc3
crw------- 1 root   root      207, 20 Jun 24 14:00 /dev/ttymxc4

and so the normal user had no access to it ...

 

Regarding the permissions on UDOObuntu we used the file named /etc/udev/rules.d/10-imx.rules for the serial ttymxc3.
The other serials may be managed the same way.