opensbi.git/include/sbi_utils/serial, branch master

lib: utils/serial: Add support for Altera JTAG UART

2026-02-20T11:20:35Z

Altera provides a JTAG UART core that provides virtual UART over JTAG and can coexist with their virtual JTAG. [1] This core has already been supported by Linux and the programming interface has always been stable. Add support for it to OpenSBI to ease JTAG prototype bringing up. The driver follows the device tree binding in mainline Linux. [2] [1] https://docs.altera.com/r/docs/683130/25.3/embedded-peripherals-ip-user-guide/jtag-uart-core [2] https://github.com/torvalds/linux/blob/v6.19-rc1/Documentation/devicetree/bindings/serial/altr%2Cjuart-1.0.yaml Signed-off-by: Icenowy Zheng Reviewed-by: Anup Patel Link: https://lore.kernel.org/r/20260104065506.70182-1-zhengxingda@iscas.ac.cn Signed-off-by: Anup Patel

lib: utils/serial: Support multiple UART8250 devices

2025-12-21T15:32:44Z

Previously we assume only 1 UART8250 instance can be used. Now we support multiple instances by introducing counterpart functions to putc/getc/init which take an extra *dev parameter, and name them as uart8250_device_xyz() The original functions without the *dev parameter will operate on the default instance exactly the same as before, so no changes on the caller is required. Note: uart8250_device_init only does device initialization without the console registration logic. Signed-off-by: Bo Gan Reviewed-by: Anup Patel Link: https://lore.kernel.org/r/20251218104243.562667-7-ganboing@gmail.com Signed-off-by: Anup Patel

lib: utils/serial: Add PXA UARTs support

2025-03-27T14:50:05Z

The PXA variant of the uart8250 adds the UART Unit Enable bit (UUE) that needs to be set to enable the XScale PXA UART. And it is required for some RISC-V SoCs like the Spacemit K1 that implement the PXA UART. This introduces the "intel,xscale-uart" compatible to handle setting the UUE bit. Signed-off-by: Junhui Liu Reviewed-by: Anup Patel Link: https://lore.kernel.org/r/20250327-pxa-uart-support-v2-1-c4400c1fcd0b@pigmoral.tech Signed-off-by: Anup Patel

inclue: sbi_utils: Cleanup int vs bool in semihosting_init() definitions

2024-12-21T15:51:59Z

This is needed for a future patches to enable the new C23 language dialect. Signed-off-by: Michael Neuling Reviewed-by: Anup Patel

lib: utils/serial: Use fdt_driver for initialization

2024-11-28T12:22:58Z

The serial driver subsystem does not need any extra data, so it can use `struct fdt_driver` directly. The generic fdt_serial_init() first attempts to match the chosen stdout device, and upon failure matches the first available serial device in the DT. It is a fatal error if no such device is found. This matches the behavior of fdt_driver_init_one(). Signed-off-by: Samuel Holland Reviewed-by: Anup Patel

lib: utils/serial: Pass the FDT to fdt_serial_init()

2024-08-24T07:33:01Z

Indicate that this function does not modify the FDT blob, and deduplicate the call to fdt_get_address(). Signed-off-by: Samuel Holland Reviewed-by: Andrew Jones Reviewed-by: Anup Patel

lib: utils/serial: Constify FDT pointers in parsing functions

2024-08-24T07:32:46Z

Indicate that none of these functions modify the devicetree by constifying the parameter type. Signed-off-by: Samuel Holland Reviewed-by: Andrew Jones Reviewed-by: Anup Patel

lib: utils: serial: Add Renesas SCIF driver

2022-12-12T13:20:26Z

Add Renesas SCIF driver. Based on a patch in the BSP by Takeki Hamada Link: https://github.com/renesas-rz/rz_opensbi/commits/work/OpenSBI-PMA Signed-off-by: Lad Prabhakar Reviewed-by: Anup Patel

lib: utils/serial: add semihosting support

2022-09-13T12:54:42Z

We add RISC-V semihosting based serial console for JTAG based early debugging. The RISC-V semihosting specification is available at: https://github.com/riscv/riscv-semihosting-spec/blob/main/riscv-semihosting-spec.adoc Signed-off-by: Anup Patel Signed-off-by: Kautuk Consul Reviewed-by: Anup Patel

lib: utils: serial: Add Cadence UART driver

2022-08-23T03:10:17Z

Add Cadence UART driver Signed-off-by: Jun Liang Tan Signed-off-by: Wei Liang Lim Reviewed-by: Andrew Jones Reviewed-by: Anup Patel