Hello John, I did as you said i.e., changed the number of UARTS to 3 in the /ti-davinci/arch/arm/defconfig file. And I recompiled the kernel. But its still the same issue....
The output of /proc/tty/driver/serial is serinfo:1.0 driver revision: 0: uart:16550A mmio:0x01C20000 irq:40 tx:2175 rx:96 RTS|CTS|DTR|DSR 1: uart:unknown port:00000000 irq:0 Also there is no /dev/ttyS2 at all in the dev folder. And the UART2 is definitely enabled in the Pimux registers. the output of /proc/pinmux is PINMUX0 = 0x80030c1f 31 AEAW Number of address bits enabled on the AEMIF - 22 1 AECS4 Enable AEMIF ECS4 chip select 1 AECS5 Enable AEMIF ECS5 chip select 0 VLYNQWD Sets VLYNQ data width 0 VLSCREN Enable VLYNQ SCRUN pin function 0 VLYNQEN Enable VLYNQ module pins 1 HDIREN Enable ATADIR DIR output on GPIO42/SPI_EN1 1 ATAEN Enable ATA module pins 0 RGB666 Enable VideoOut extended RGB666 mode outputs on GIOs 0 RGB888 Enable VideoOut extended RGB888 mode outputs on GIOs 0 LOEEN Enable LCD_OE pin function on GPIO0 0 LFLDEN Enable LCD_FIELD pin function on GPIO1 0 CWEN Enable CCD _C_WEN function on GPIO3/B0 0 CFLDEN Enable CCD C_FIELD pin function on GPIO4/R0 1 EMACEN Enable EMAC and MDIO function on default GPIO3V[0:16] pins. PINMUX1 = 0x0000048d 1 UART0 Enable UART0 on GPIO[35:36] 0 UART1 Enable UART1 on ATA DMACK and DMARQ 1 UART2 Enable UART2 1 U2FLO Enable UART2 flow control on Upper CCD/Chroma signals 0 PWM0 Enable PWM0 on GPIO45 0 PWM1 Enable PWM1 on GPIO46/R2 0 PWM2 Enable PWM2 on GPIO47/B2 1 I2C Enable I2C on GPIO[43:44] 0 SPI Enable SPI on GPIO[37,39,40,41,42] 0 MSTK Enable Memory Stick/MMC/SD 1 McBSP Enable McBSP function on default GPIO[29:34] pins 0 CLK0 Enable CLKOUT0 on GPIO48 0 CLK1 Enable CLKOUT1 on GPIO49 0 TIMIN Enable TIM_IN on GPIO49 / CLKOUT1 Also during bootup i notice the following sequence. Doesnt make sense to me... Serial: 8250/16550 driver $Revision: 1.90 $ 2 ports, IRQ sharing disabled Registering platform device 'serial8250'. Parent at platform ttyS0 at MMIO 0x1c20000 (irq = 40) is a 16550A It still says it has only 2 ports... How could that happen..... I'm still clueless as to what went wrong... Can you figure it out... Thanks, Preetham John Ronald Taneza <[EMAIL PROTECTED]> wrote: > Also now I'm facing a new problem: > > I've made the changes as recommended by the mailing list in board-evm.c > serial.c and clock.c as shown by this link: > http://www.mail-archive.com/[EMAIL PROTECTED] om/msg02308.html > > But i'm still not able to enable UART2. Is there anything extra that must be done. In .config, you must set #uarts to 3: CONFIG_SERIAL_8250_NR_UARTS=3 Also, the uart ports are /dev/ttySx, ex. /dev/ttyS2 for uart2. Lastly, verify that uart2 is enabled in pinmux. Check /proc/pinmux. -Ronald Send instant messages to your online friends http://uk.messenger.yahoo.com
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