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lib: utils/serial: Support multiple UART8250 devices

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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 <ganboing@gmail.com>
Reviewed-by: Anup Patel <anup@brainfault.org>
Link: https://lore.kernel.org/r/20251218104243.562667-7-ganboing@gmail.com
Signed-off-by: Anup Patel <anup@brainfault.org>
This commit is contained in:
Bo Gan
2025-12-18 02:42:42 -08:00
committed by Anup Patel
parent e5797e0688
commit fbff3a7e07
2 changed files with 75 additions and 45 deletions
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16
include/sbi_utils/serial/uart8250.h
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@@ -14,6 +14,22 @@
#define UART_CAP_UUE BIT(0) /* Check UUE capability for XScale PXA UARTs */
struct uart8250_device {
volatile char *base;
u32 in_freq;
u32 baudrate;
u32 reg_width;
u32 reg_shift;
};
int uart8250_device_getc(struct uart8250_device *dev);
void uart8250_device_putc(struct uart8250_device *dev, char ch);
void uart8250_device_init(struct uart8250_device *dev, unsigned long base,
u32 in_freq, u32 baudrate, u32 reg_shift,
u32 reg_width, u32 reg_offset, u32 caps);
int uart8250_init(unsigned long base, u32 in_freq, u32 baudrate, u32 reg_shift,
u32 reg_width, u32 reg_offset, u32 caps);