diff options
| -rw-r--r-- | drivers/serial/Kconfig | 11 | ||||
| -rw-r--r-- | drivers/serial/ns16550.c | 44 |
2 files changed, 55 insertions, 0 deletions
diff --git a/drivers/serial/Kconfig b/drivers/serial/Kconfig index 2a50771a27..0f0e92df07 100644 --- a/drivers/serial/Kconfig +++ b/drivers/serial/Kconfig @@ -195,6 +195,17 @@ config ROCKCHIP_SERIAL your board config header. The clock input is automatically set to use the oscillator (24MHz). +config NS16550_SERIAL + bool "NS16550 UART or compatible" + depends on DM_SERIAL + help + Support NS16550 UART or compatible with driver model. This can be + enabled in the device tree with the correct input clock frequency. + If the input clock frequency is not defined in the device tree, + the macro CONFIG_SYS_NS16550_CLK defined in a legacy board header + file will be used. It can be a constant or a function to get clock, + eg, get_serial_clock(). + config SANDBOX_SERIAL bool "Sandbox UART support" depends on SANDBOX diff --git a/drivers/serial/ns16550.c b/drivers/serial/ns16550.c index 8d028de46a..f0a9aac62a 100644 --- a/drivers/serial/ns16550.c +++ b/drivers/serial/ns16550.c @@ -56,6 +56,10 @@ DECLARE_GLOBAL_DATA_PTR; #ifdef CONFIG_DM_SERIAL +#ifndef CONFIG_SYS_NS16550_CLK +#define CONFIG_SYS_NS16550_CLK 0 +#endif + static inline void serial_out_shift(void *addr, int shift, int value) { #ifdef CONFIG_SYS_NS16550_PORT_MAPPED @@ -400,6 +404,15 @@ int ns16550_serial_ofdata_to_platdata(struct udevice *dev) plat->base = addr; plat->reg_shift = fdtdec_get_int(gd->fdt_blob, dev->of_offset, "reg-shift", 1); +#ifdef CONFIG_NS16550_SERIAL + plat->clock = fdtdec_get_int(gd->fdt_blob, dev->of_offset, + "clock-frequency", + CONFIG_SYS_NS16550_CLK); + if (!plat->clock) { + debug("ns16550 clock not defined\n"); + return -EINVAL; + } +#endif /* CONFIG_NS16550_SERIAL */ return 0; } @@ -411,4 +424,35 @@ const struct dm_serial_ops ns16550_serial_ops = { .getc = ns16550_serial_getc, .setbrg = ns16550_serial_setbrg, }; + +#ifdef CONFIG_NS16550_SERIAL +#if CONFIG_IS_ENABLED(OF_CONTROL) +static const struct udevice_id ns16550_serial_ids[] = { + { .compatible = "ns16550" }, + { .compatible = "ns16550a" }, + { .compatible = "nvidia,tegra20-uart" }, + { .compatible = "snps,dw-apb-uart" }, + { .compatible = "ti,omap2-uart" }, + { .compatible = "ti,omap3-uart" }, + { .compatible = "ti,omap4-uart" }, + { .compatible = "ti,am3352-uart" }, + { .compatible = "ti,am4372-uart" }, + { .compatible = "ti,dra742-uart" }, + {} +}; +#endif + +U_BOOT_DRIVER(ns16550_serial) = { + .name = "ns16550_serial", + .id = UCLASS_SERIAL, +#if CONFIG_IS_ENABLED(OF_CONTROL) + .of_match = ns16550_serial_ids, + .ofdata_to_platdata = ns16550_serial_ofdata_to_platdata, + .platdata_auto_alloc_size = sizeof(struct ns16550_platdata), +#endif + .priv_auto_alloc_size = sizeof(struct NS16550), + .probe = ns16550_serial_probe, + .ops = &ns16550_serial_ops, +}; +#endif /* CONFIG_NS16550_SERIAL */ #endif /* CONFIG_DM_SERIAL */ |
