61 lines
1.6 KiB
C
61 lines
1.6 KiB
C
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// SPDX-License-Identifier: GPL-2.0+
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/*
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* [partely copied from arch/arm/cpu/arm926ejs/at91/arm9260_devices.c]
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*
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* (C) Copyright 2011
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* Andreas Bießmann <andreas@biessmann.org>
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*
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* (C) Copyright 2007-2008
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* Stelian Pop <stelian@popies.net>
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* Lead Tech Design <www.leadtechdesign.com>
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*/
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#include <common.h>
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#include <asm/io.h>
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#include <asm/arch/at91_common.h>
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#include <asm/arch/clk.h>
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#include <asm/arch/gpio.h>
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/*
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* if CONFIG_AT91_GPIO_PULLUP ist set, keep pullups on on all
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* peripheral pins. Good to have if hardware is soldered optionally
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* or in case of SPI no slave is selected. Avoid lines to float
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* needlessly. Use a short local PUP define.
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*
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* Due to errata "TXD floats when CTS is inactive" pullups are always
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* on for TXD pins.
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*/
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#ifdef CONFIG_AT91_GPIO_PULLUP
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# define PUP CONFIG_AT91_GPIO_PULLUP
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#else
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# define PUP 0
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#endif
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void at91_serial0_hw_init(void)
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{
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at91_set_a_periph(AT91_PIO_PORTA, 17, 1); /* TXD0 */
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at91_set_a_periph(AT91_PIO_PORTA, 18, PUP); /* RXD0 */
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at91_periph_clk_enable(ATMEL_ID_USART0);
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}
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void at91_serial1_hw_init(void)
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{
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at91_set_a_periph(AT91_PIO_PORTB, 20, PUP); /* RXD1 */
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at91_set_a_periph(AT91_PIO_PORTB, 21, 1); /* TXD1 */
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at91_periph_clk_enable(ATMEL_ID_USART1);
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}
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void at91_serial2_hw_init(void)
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{
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at91_set_a_periph(AT91_PIO_PORTA, 22, PUP); /* RXD2 */
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at91_set_a_periph(AT91_PIO_PORTA, 23, 1); /* TXD2 */
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at91_periph_clk_enable(ATMEL_ID_USART2);
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}
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void at91_seriald_hw_init(void)
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{
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at91_set_a_periph(AT91_PIO_PORTA, 30, PUP); /* DRXD */
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at91_set_a_periph(AT91_PIO_PORTA, 31, 1); /* DTXD */
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/* writing SYS to PCER has no effect on AT91RM9200 */
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}
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