diff options
Diffstat (limited to 'src/cpu/samsung/exynos5420/pinmux.h')
-rw-r--r-- | src/cpu/samsung/exynos5420/pinmux.h | 55 |
1 files changed, 55 insertions, 0 deletions
diff --git a/src/cpu/samsung/exynos5420/pinmux.h b/src/cpu/samsung/exynos5420/pinmux.h new file mode 100644 index 000000000000..c94b6eb9a149 --- /dev/null +++ b/src/cpu/samsung/exynos5420/pinmux.h @@ -0,0 +1,55 @@ +/* + * This file is part of the coreboot project. + * + * Copyright (C) 2012 Samsung Electronics + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; version 2 of the License. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA + */ + +#ifndef CPU_SAMSUNG_EXYNOS5420_PINMUX_H +#define CPU_SAMSUNG_EXYNOS5420_PINMUX_H + +#include "periph.h" + +enum { + PINMUX_FLAG_NONE = 0x00000000, + + /* Flags for eMMC */ + PINMUX_FLAG_8BIT_MODE = 1 << 0, /* SDMMC 8-bit mode */ + + /* + * Flags for SPI. + */ + PINMUX_FLAG_SLAVE_MODE = 1 << 0, /* Slave mode */ + + /* Flags for SROM controller */ + PINMUX_FLAG_BANK = 3 << 0, /* bank number (0-3) */ + PINMUX_FLAG_16BIT = 1 << 2, /* 16-bit width */ +}; + +/** + * Configures the pinmux for a particular peripheral. + * + * Each gpio can be configured in many different ways (4 bits on exynos) + * such as "input", "output", "special function", "external interrupt" + * etc. This function will configure the peripheral pinmux along with + * pull-up/down and drive strength. + * + * @param peripheral peripheral to be configured + * @param flags configure flags + * @return 0 if ok, -1 on error (e.g. unsupported peripheral) + */ +int exynos_pinmux_config(enum periph_id peripheral, int flags); + +#endif |