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platform: andes/ae350: Use fdt serial driver

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Andes UART is compatible with uart8250 driver. We can use
fdt_serial_init() as platform console init hook.

dts example:

  serial0: serial@f0300000 {
    compatible = "andestech,uart16550", "ns16550a";
    reg = <0x00000000 0xf0300000 0x00000000 0x00001000>;
    interrupts = <9 4>;
    interrupt-parent = <&plic0>;
    clock-frequency = <19660800>;
    current-speed = <38400>;
    reg-shift = <2>;
    reg-offset = <32>;
    reg-io-width = <4>;
    no-loopback-test = <1>;
  };

Signed-off-by: Yu Chien Peter Lin <peterlin@andestech.com>
Reviewed-by: Anup Patel <anup@brainfault.org>
This commit is contained in:
Yu Chien Peter Lin 2022-10-14 08:32:45 +08:00 • committed by Anup Patel
parent 9899b59beb
commit 88f58a3694
3 changed files with 4 additions and 22 deletions
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3
platform/andes/ae350/Kconfig
View file

@ -4,7 +4,8 @@ config PLATFORM_ANDES_AE350
bool
select FDT
select IRQCHIP_PLIC
select SERIAL_UART8250
select FDT_SERIAL
select FDT_SERIAL_UART8250
default y
if PLATFORM_ANDES_AE350

15
platform/andes/ae350/platform.c
View file

@ -18,7 +18,7 @@
#include <sbi_utils/fdt/fdt_helper.h>
#include <sbi_utils/fdt/fdt_fixup.h>
#include <sbi_utils/irqchip/plic.h>
#include <sbi_utils/serial/uart8250.h>
#include <sbi_utils/serial/fdt_serial.h>
#include "platform.h"
#include "plicsw.h"
#include "plmt.h"
@ -43,17 +43,6 @@ static int ae350_final_init(bool cold_boot)
return 0;
}
/* Initialize the platform console. */
static int ae350_console_init(void)
{
return uart8250_init(AE350_UART_ADDR,
AE350_UART_FREQUENCY,
AE350_UART_BAUDRATE,
AE350_UART_REG_SHIFT,
AE350_UART_REG_WIDTH,
AE350_UART_REG_OFFSET);
}
/* Initialize the platform interrupt controller for current HART. */
static int ae350_irqchip_init(bool cold_boot)
{
@ -155,7 +144,7 @@ static int ae350_vendor_ext_provider(long extid, long funcid,
const struct sbi_platform_operations platform_ops = {
.final_init = ae350_final_init,
.console_init = ae350_console_init,
.console_init = fdt_serial_init,
.irqchip_init = ae350_irqchip_init,

8
platform/andes/ae350/platform.h
View file

@ -22,14 +22,6 @@
#define AE350_L2C_ADDR 0xe0500000
#define AE350_UART_ADDR_OFFSET 0x20
#define AE350_UART_ADDR (0xf0300000 + AE350_UART_ADDR_OFFSET)
#define AE350_UART_FREQUENCY 19660800
#define AE350_UART_BAUDRATE 38400
#define AE350_UART_REG_SHIFT 2
#define AE350_UART_REG_WIDTH 0
#define AE350_UART_REG_OFFSET 0
/*Memory and Miscellaneous Registers*/
#define CSR_MILMB 0x7c0
#define CSR_MDLMB 0x7c1