diff options
Diffstat (limited to 'drivers/tty')
| -rw-r--r-- | drivers/tty/serial/apbuart.c | 24 |
1 files changed, 7 insertions, 17 deletions
diff --git a/drivers/tty/serial/apbuart.c b/drivers/tty/serial/apbuart.c index 12d4e7ca53c..19a943693e4 100644 --- a/drivers/tty/serial/apbuart.c +++ b/drivers/tty/serial/apbuart.c @@ -598,24 +598,12 @@ static struct platform_driver grlib_apbuart_of_driver = { static int grlib_apbuart_configure(void) { - struct device_node *np, *rp; - const u32 *prop; - int freq_khz, line = 0; - - /* Get bus frequency */ - rp = of_find_node_by_path("/"); - if (!rp) - return -ENODEV; - rp = of_get_next_child(rp, NULL); - if (!rp) - return -ENODEV; - prop = of_get_property(rp, "clock-frequency", NULL); - if (!prop) - return -ENODEV; - freq_khz = *prop; + struct device_node *np; + int line = 0; for_each_matching_node(np, apbuart_match) { const int *ampopts; + const u32 *freq_hz; const struct amba_prom_registers *regs; struct uart_port *port; unsigned long addr; @@ -624,8 +612,10 @@ static int grlib_apbuart_configure(void) if (ampopts && (*ampopts == 0)) continue; /* Ignore if used by another OS instance */ regs = of_get_property(np, "reg", NULL); + /* Frequency of APB Bus is frequency of UART */ + freq_hz = of_get_property(np, "freq", NULL); - if (!regs) + if (!regs || !freq_hz || (*freq_hz == 0)) continue; grlib_apbuart_nodes[line] = np; @@ -641,7 +631,7 @@ static int grlib_apbuart_configure(void) port->ops = &grlib_apbuart_ops; port->flags = UPF_BOOT_AUTOCONF; port->line = line; - port->uartclk = freq_khz * 1000; + port->uartclk = *freq_hz; port->fifosize = apbuart_scan_fifo_size((struct uart_port *) port, line); line++; |