diff options
Diffstat (limited to 'arch/arm/include/asm/arch-uniphier/debug-uart.S')
| -rw-r--r-- | arch/arm/include/asm/arch-uniphier/debug-uart.S | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/arch/arm/include/asm/arch-uniphier/debug-uart.S b/arch/arm/include/asm/arch-uniphier/debug-uart.S new file mode 100644 index 0000000..af55fee --- /dev/null +++ b/arch/arm/include/asm/arch-uniphier/debug-uart.S @@ -0,0 +1,24 @@ +/* + * Copyright (C) 2014 Panasonic Corporation + * Author: Masahiro Yamada <yamada.m@jp.panasonic.com> + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#include <linux/serial_reg.h> + +#if !defined(CONFIG_DEBUG_SEMIHOSTING) +#include CONFIG_DEBUG_LL_INCLUDE +#endif + +#define BAUDRATE 115200 +#define DIV_ROUND(x, d) (((x) + ((d) / 2)) / (d)) +#define DIVISOR DIV_ROUND(UART_CLK, 16 * BAUDRATE) + + .macro init_debug_uart, ra, rb, rc + addruart \ra, \rb, \rc + mov \rb, #UART_LCR_WLEN8 + strb \rb, [\ra, #0x11] + ldr \rb, =DIVISOR + str \rb, [\ra, #0x24] + .endm |