diff options
| author | Albert ARIBAUD <albert.u.boot@aribaud.net> | 2015-02-24 07:59:38 +0100 |
|---|---|---|
| committer | Albert ARIBAUD <albert.u.boot@aribaud.net> | 2015-02-24 07:59:38 +0100 |
| commit | e1cc4d31f889428a4ca73120951389c756404184 (patch) | |
| tree | 4a2028c750e19f5d36d0aa7545bda7cbacea9dd4 /arch/arm/mach-at91/arm920t/at91rm9200_devices.c | |
| parent | 23d184d2fbc805bdd9fb41f2370cdce04a7894af (diff) | |
| parent | 38dac81b3d0e777f301ca98100bfbcab01d616c2 (diff) | |
Merge remote-tracking branch 'u-boot/master' into 'u-boot-arm/master'
Diffstat (limited to 'arch/arm/mach-at91/arm920t/at91rm9200_devices.c')
| -rw-r--r-- | arch/arm/mach-at91/arm920t/at91rm9200_devices.c | 67 |
1 files changed, 67 insertions, 0 deletions
diff --git a/arch/arm/mach-at91/arm920t/at91rm9200_devices.c b/arch/arm/mach-at91/arm920t/at91rm9200_devices.c new file mode 100644 index 0000000000..fc54327c0d --- /dev/null +++ b/arch/arm/mach-at91/arm920t/at91rm9200_devices.c @@ -0,0 +1,67 @@ +/* + * [partely copied from arch/arm/cpu/arm926ejs/at91/arm9260_devices.c] + * + * (C) Copyright 2011 + * Andreas Bießmann <andreas.devel@googlemail.com> + * + * (C) Copyright 2007-2008 + * Stelian Pop <stelian@popies.net> + * Lead Tech Design <www.leadtechdesign.com> + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#include <common.h> +#include <asm/io.h> +#include <asm/arch/at91_common.h> +#include <asm/arch/at91_pmc.h> +#include <asm/arch/gpio.h> + +/* + * if CONFIG_AT91_GPIO_PULLUP ist set, keep pullups on on all + * peripheral pins. Good to have if hardware is soldered optionally + * or in case of SPI no slave is selected. Avoid lines to float + * needlessly. Use a short local PUP define. + * + * Due to errata "TXD floats when CTS is inactive" pullups are always + * on for TXD pins. + */ +#ifdef CONFIG_AT91_GPIO_PULLUP +# define PUP CONFIG_AT91_GPIO_PULLUP +#else +# define PUP 0 +#endif + +void at91_serial0_hw_init(void) +{ + at91_pmc_t *pmc = (at91_pmc_t *)ATMEL_BASE_PMC; + + at91_set_a_periph(AT91_PIO_PORTA, 17, 1); /* TXD0 */ + at91_set_a_periph(AT91_PIO_PORTA, 18, PUP); /* RXD0 */ + writel(1 << ATMEL_ID_USART0, &pmc->pcer); +} + +void at91_serial1_hw_init(void) +{ + at91_pmc_t *pmc = (at91_pmc_t *)ATMEL_BASE_PMC; + + at91_set_a_periph(AT91_PIO_PORTB, 20, PUP); /* RXD1 */ + at91_set_a_periph(AT91_PIO_PORTB, 21, 1); /* TXD1 */ + writel(1 << ATMEL_ID_USART1, &pmc->pcer); +} + +void at91_serial2_hw_init(void) +{ + at91_pmc_t *pmc = (at91_pmc_t *)ATMEL_BASE_PMC; + + at91_set_a_periph(AT91_PIO_PORTA, 22, PUP); /* RXD2 */ + at91_set_a_periph(AT91_PIO_PORTA, 23, 1); /* TXD2 */ + writel(1 << ATMEL_ID_USART2, &pmc->pcer); +} + +void at91_seriald_hw_init(void) +{ + at91_set_a_periph(AT91_PIO_PORTA, 30, PUP); /* DRXD */ + at91_set_a_periph(AT91_PIO_PORTA, 31, 1); /* DTXD */ + /* writing SYS to PCER has no effect on AT91RM9200 */ +} |