diff options
| author | Gabriel Somlo <gsomlo@gmail.com> | 2021-11-16 14:17:04 -0500 |
|---|---|---|
| committer | Anup Patel <anup@brainfault.org> | 2021-11-18 13:22:02 +0530 |
| commit | 52af6e4b52d0ea1d687121bfba0954c2621d2629 (patch) | |
| tree | 4e075754ccc1d9271fcf38988dec820a06de0c61 /lib/utils/serial/fdt_serial_litex.c | |
| parent | d335a178d8cfdf2ed13af70fe385f7e38162e171 (diff) | |
lib: utils: Add LiteX UART support
Add support for the UART provided by the LiteX SoC
framework (https://github.com/enjoy-digital/litex),
based on its FDT info (described in the Linux tree at
Documentation/devicetree/bindings/serial/litex,liteuart.yaml).
Signed-off-by: Gabriel Somlo <gsomlo@gmail.com>
Reviewed-by: Xiang W <wxjstz@126.com>
Reviewed-by: Anup Patel <anup.patel@wdc.com>
Diffstat (limited to 'lib/utils/serial/fdt_serial_litex.c')
| -rw-r--r-- | lib/utils/serial/fdt_serial_litex.c | 39 |
1 files changed, 39 insertions, 0 deletions
diff --git a/lib/utils/serial/fdt_serial_litex.c b/lib/utils/serial/fdt_serial_litex.c new file mode 100644 index 0000000..3b3b306 --- /dev/null +++ b/lib/utils/serial/fdt_serial_litex.c @@ -0,0 +1,39 @@ +/* + * SPDX-License-Identifier: BSD-2-Clause + * + * Copyright (c) 2021 Gabriel Somlo + * + * Authors: + * Gabriel Somlo <gsomlo@gmail.com> + */ + +#include <sbi/sbi_error.h> +#include <sbi_utils/fdt/fdt_helper.h> +#include <sbi_utils/serial/fdt_serial.h> +#include <sbi_utils/serial/litex-uart.h> + +static int serial_litex_init(void *fdt, int nodeoff, + const struct fdt_match *match) +{ + uint64_t reg_addr, reg_size; + int rc; + + if (nodeoff < 0 || !fdt) + return SBI_ENODEV; + + rc = fdt_get_node_addr_size(fdt, nodeoff, 0, ®_addr, ®_size); + if (rc < 0 || !reg_addr || !reg_size) + return SBI_ENODEV; + + return litex_uart_init(reg_addr); +} + +static const struct fdt_match serial_litex_match[] = { + { .compatible = "litex,liteuart" }, + { }, +}; + +struct fdt_serial fdt_serial_litex = { + .match_table = serial_litex_match, + .init = serial_litex_init +}; |