Hi, I'm trying to bring up UART1 on my custom board, and have followed the various advice on the board about UART1 configuration:
I've edited serial.h with:
#define DAVINCI_UART1_BASE (IO_PHYS + 0x106000)
I've edited the dm365.c to add:
{
.mapbase = DAVINCI_UART1_BASE,
.irq = IRQ_UARTINT1,
.flags = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST | UPF_IOREMAP,
.iotype = UPIO_MEM,
.regshift = 2,
},
and
static struct clk uart1_clk = {
.name = "uart1",
.parent = &pll1_sysclk4,
.lpsc = DAVINCI_LPSC_UART1,
};
and
CLK(NULL, "uart1", &uart1_clk),
and I've setup pinmux for my board's alternate UART1 pinout:
MUX_CFG(DM365, UART1_TXD, 3, 29, 3, 3, false) // GPIO 25 : UART1_TXD
MUX_CFG(DM365, UART1_RXD, 4, 14, 3, 3, false) // GPIO 34 : UART1_RXD
and I've altered the board config:
static struct davinci_uart_config uart_config __initdata = {
.enabled_uarts = 0x03, //enable two uarts
};
when i run this kernel, and a write a bunch of data to /dev/ttyS1, here's cat /proc/tty/driver/serial
serinfo:1.0 driver revision:
0: uart:16550A mmio:0x01C20000 irq:40 tx:1545 rx:155 RTS|CTS|DTR|DSR
1: uart:16550A mmio:0x01D06000 irq:41 tx:623250 rx:0 CTS|DSR
You can see that the driver thinks its transmitted a lot of bytes... But there's nothing coming out of pin UART1_TXD, I've checked with a scope.
Anything I'm missing? What to try next?
Regards,
Mitch
