projects / people / ms / u-boot.git / blame
| Commit | Line | Data |
|---|---|---|
| 52f69f81 VZ |
1 | /* |
| 2 | * Copyright (C) 2011 by Vladimir Zapolskiy <vz@mleia.com> | |
| 3 | * | |
| 1a459660 | 4 | * SPDX-License-Identifier: GPL-2.0+ |
| 52f69f81 VZ |
5 | */ |
| 6 | ||
| 7 | #include <common.h> | |
| 8 | #include <asm/arch/cpu.h> | |
| 9 | #include <asm/arch/clk.h> | |
| 10 | #include <asm/arch/uart.h> | |
| 11 | #include <asm/io.h> | |
| 12 | ||
| 13 | static struct clk_pm_regs *clk = (struct clk_pm_regs *)CLK_PM_BASE; | |
| 14 | static struct uart_ctrl_regs *ctrl = (struct uart_ctrl_regs *)UART_CTRL_BASE; | |
| 15 | ||
| 16 | void lpc32xx_uart_init(unsigned int uart_id) | |
| 17 | { | |
| 18 | if (uart_id < 1 || uart_id > 7) | |
| 19 | return; | |
| 20 | ||
| 21 | /* Disable loopback mode, if it is set by S1L bootloader */ | |
| 22 | clrbits_le32(&ctrl->loop, | |
| 23 | UART_LOOPBACK(CONFIG_SYS_LPC32XX_UART)); | |
| 24 | ||
| 25 | if (uart_id < 3 || uart_id > 6) | |
| 26 | return; | |
| 27 | ||
| 28 | /* Enable UART system clock */ | |
| 29 | setbits_le32(&clk->uartclk_ctrl, CLK_UART(uart_id)); | |
| 30 | ||
| 31 | /* Set UART into autoclock mode */ | |
| 32 | clrsetbits_le32(&ctrl->clkmode, | |
| 33 | UART_CLKMODE_MASK(uart_id), | |
| 34 | UART_CLKMODE_AUTO(uart_id)); | |
| 35 | ||
| 36 | /* Bypass pre-divider of UART clock */ | |
| 37 | writel(CLK_UART_X_DIV(1) | CLK_UART_Y_DIV(1), | |
| 38 | &clk->u3clk + (uart_id - 3)); | |
| 39 | } |