1 /* SPDX-License-Identifier: GPL-2.0+ */ 2 /* 3 * Copyright (C) 2012 Samsung Electronics 4 * Abhilash Kesavan <a.kesavan@samsung.com> 5 */ 6 7 #ifndef __ASM_ARM_ARCH_PINMUX_H 8 #define __ASM_ARM_ARCH_PINMUX_H 9 10 #include "periph.h" 11 12 /* 13 * Flags for setting specific configarations of peripherals. 14 * List will grow with support for more devices getting added. 15 */ 16 enum { 17 PINMUX_FLAG_NONE = 0x00000000, 18 19 /* Flags for eMMC */ 20 PINMUX_FLAG_8BIT_MODE = 1 << 0, /* SDMMC 8-bit mode */ 21 22 /* Flags for SROM controller */ 23 PINMUX_FLAG_BANK = 3 << 0, /* bank number (0-3) */ 24 PINMUX_FLAG_16BIT = 1 << 2, /* 16-bit width */ 25 }; 26 27 /** 28 * Configures the pinmux for a particular peripheral. 29 * 30 * Each gpio can be configured in many different ways (4 bits on exynos) 31 * such as "input", "output", "special function", "external interrupt" 32 * etc. This function will configure the peripheral pinmux along with 33 * pull-up/down and drive strength. 34 * 35 * @param peripheral peripheral to be configured 36 * @param flags configure flags 37 * @return 0 if ok, -1 on error (e.g. unsupported peripheral) 38 */ 39 int exynos_pinmux_config(int peripheral, int flags); 40 41 /** 42 * Decode the peripheral id using the interrpt numbers. 43 * 44 * @param blob Device tree blob 45 * @param node FDT I2C node to find 46 * @return peripheral id if ok, PERIPH_ID_NONE on error 47 */ 48 int pinmux_decode_periph_id(const void *blob, int node); 49 #endif 50