diff options
Diffstat (limited to 'arch/arm/cpu/tegra124-common/funcmux.c')
| -rw-r--r-- | arch/arm/cpu/tegra124-common/funcmux.c | 69 | 
1 files changed, 69 insertions, 0 deletions
diff --git a/arch/arm/cpu/tegra124-common/funcmux.c b/arch/arm/cpu/tegra124-common/funcmux.c new file mode 100644 index 000000000..d19fda06c --- /dev/null +++ b/arch/arm/cpu/tegra124-common/funcmux.c @@ -0,0 +1,69 @@ +/* + * (C) Copyright 2013 + * NVIDIA Corporation <www.nvidia.com> + * + * SPDX-License-Identifier:     GPL-2.0+ + */ + +/* Tegra124 high-level function multiplexing */ + +#include <common.h> +#include <asm/arch/clock.h> +#include <asm/arch/funcmux.h> +#include <asm/arch/pinmux.h> + +int funcmux_select(enum periph_id id, int config) +{ +	int bad_config = config != FUNCMUX_DEFAULT; + +	switch (id) { +	case PERIPH_ID_UART4: +		switch (config) { +		case FUNCMUX_UART4_GPIO: /* TXD,RXD,CTS,RTS */ +			pinmux_set_func(PINGRP_GPIO_PJ7, PMUX_FUNC_UARTD); +			pinmux_set_func(PINGRP_GPIO_PB0, PMUX_FUNC_UARTD); +			pinmux_set_func(PINGRP_GPIO_PB1, PMUX_FUNC_UARTD); +			pinmux_set_func(PINGRP_GPIO_PK7, PMUX_FUNC_UARTD); + +			pinmux_set_io(PINGRP_GPIO_PJ7, PMUX_PIN_OUTPUT); +			pinmux_set_io(PINGRP_GPIO_PB0, PMUX_PIN_INPUT); +			pinmux_set_io(PINGRP_GPIO_PB1, PMUX_PIN_INPUT); +			pinmux_set_io(PINGRP_GPIO_PK7, PMUX_PIN_OUTPUT); + +			pinmux_tristate_disable(PINGRP_GPIO_PJ7); +			pinmux_tristate_disable(PINGRP_GPIO_PB0); +			pinmux_tristate_disable(PINGRP_GPIO_PB1); +			pinmux_tristate_disable(PINGRP_GPIO_PK7); +			break; +		} +		break; + +	case PERIPH_ID_UART1: +		switch (config) { +		case FUNCMUX_UART1_KBC: +			pinmux_set_func(PINGRP_KB_ROW9, PMUX_FUNC_UARTA); +			pinmux_set_func(PINGRP_KB_ROW10, PMUX_FUNC_UARTA); + +			pinmux_set_io(PINGRP_KB_ROW9, PMUX_PIN_OUTPUT); +			pinmux_set_io(PINGRP_KB_ROW10, PMUX_PIN_INPUT); + +			pinmux_tristate_disable(PINGRP_KB_ROW9); +			pinmux_tristate_disable(PINGRP_KB_ROW10); +			break; +		} +		break; + +	/* Add other periph IDs here as needed */ + +	default: +		debug("%s: invalid periph_id %d", __func__, id); +		return -1; +	} + +	if (bad_config) { +		debug("%s: invalid config %d for periph_id %d", __func__, +		      config, id); +		return -1; +	} +	return 0; +}  |