diff options
Diffstat (limited to 'components/drivers/serial/device/8250/early.c')
| -rw-r--r-- | components/drivers/serial/device/8250/early.c | 32 |
1 files changed, 30 insertions, 2 deletions
diff --git a/components/drivers/serial/device/8250/early.c b/components/drivers/serial/device/8250/early.c index 75fdb17873..7da1b61806 100644 --- a/components/drivers/serial/device/8250/early.c +++ b/components/drivers/serial/device/8250/early.c @@ -143,8 +143,36 @@ static rt_err_t common_early_setup(struct rt_fdt_earlycon *con, const char *opti RT_FDT_EARLYCON_EXPORT(bcm2835aux, "uart8250", "brcm,bcm2835-aux-uart", common_early_setup); RT_FDT_EARLYCON_EXPORT(tegra20, "uart8250", "nvidia,tegra20-uart", common_early_setup); RT_FDT_EARLYCON_EXPORT(dw8250, "uart8250", "snps,dw-apb-uart", common_early_setup); -RT_FDT_EARLYCON_EXPORT(ns16550a, "uart8250", "ns16550a", common_early_setup); -RT_FDT_EARLYCON_EXPORT(ns16550, "uart8250", "ns16550", common_early_setup); + +static rt_err_t ns16550_early_setup(struct rt_fdt_earlycon *con, const char *options) +{ + rt_uint32_t width = 1; + struct serial8250 *serial = &early_serial8250; + + common_init(serial, con); + serial->regshift = 0; + fdt_getprop_u32(con->fdt, con->nodeoffset, "reg-shift", &serial->regshift, RT_NULL); + fdt_getprop_u32(con->fdt, con->nodeoffset, "reg-io-width", &width, RT_NULL); + + switch (width) + { + case 1: + serial->iotype = PORT_MMIO; + break; + case 2: + serial->iotype = PORT_MMIO16; + break; + case 4: + serial->iotype = PORT_MMIO32; + break; + default: + return -RT_EINVAL; + } + + return serial8250_early_fdt_setup(serial, con, options); +} +RT_FDT_EARLYCON_EXPORT(ns16550a, "uart8250", "ns16550a", ns16550_early_setup); +RT_FDT_EARLYCON_EXPORT(ns16550, "uart8250", "ns16550", ns16550_early_setup); #ifdef RT_USING_8250_OMAP static rt_err_t omap8250_early_setup(struct rt_fdt_earlycon *con, const char *options) |