| /* SPDX-License-Identifier: GPL-2.0+ */ |
| /* |
| * Copyright (C) 2012 Samsung Electronics |
| * Abhilash Kesavan <a.kesavan@samsung.com> |
| */ |
| |
| #ifndef __ASM_ARM_ARCH_PINMUX_H |
| #define __ASM_ARM_ARCH_PINMUX_H |
| |
| #include "periph.h" |
| |
| /* |
| * Flags for setting specific configarations of peripherals. |
| * List will grow with support for more devices getting added. |
| */ |
| enum { |
| PINMUX_FLAG_NONE = 0x00000000, |
| |
| /* Flags for eMMC */ |
| PINMUX_FLAG_8BIT_MODE = 1 << 0, /* SDMMC 8-bit mode */ |
| |
| /* Flags for SROM controller */ |
| PINMUX_FLAG_BANK = 3 << 0, /* bank number (0-3) */ |
| PINMUX_FLAG_16BIT = 1 << 2, /* 16-bit width */ |
| |
| /* Flags for I2C */ |
| PINMUX_FLAG_HS_MODE = 1 << 1, /* I2C High Speed Mode */ |
| }; |
| |
| /** |
| * 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(int peripheral, int flags); |
| |
| /** |
| * Decode the peripheral id using the interrpt numbers. |
| * |
| * @param blob Device tree blob |
| * @param node FDT I2C node to find |
| * @return peripheral id if ok, PERIPH_ID_NONE on error |
| */ |
| int pinmux_decode_periph_id(const void *blob, int node); |
| #endif |
