1*225f5eecSMinkyu Kang /* 2*225f5eecSMinkyu Kang * Copyright (C) 2012 Samsung Electronics 3*225f5eecSMinkyu Kang * Abhilash Kesavan <a.kesavan@samsung.com> 4*225f5eecSMinkyu Kang * 5*225f5eecSMinkyu Kang * SPDX-License-Identifier: GPL-2.0+ 6*225f5eecSMinkyu Kang */ 7*225f5eecSMinkyu Kang 8*225f5eecSMinkyu Kang #ifndef __ASM_ARM_ARCH_PINMUX_H 9*225f5eecSMinkyu Kang #define __ASM_ARM_ARCH_PINMUX_H 10*225f5eecSMinkyu Kang 11*225f5eecSMinkyu Kang #include "periph.h" 12*225f5eecSMinkyu Kang 13*225f5eecSMinkyu Kang /* 14*225f5eecSMinkyu Kang * Flags for setting specific configarations of peripherals. 15*225f5eecSMinkyu Kang * List will grow with support for more devices getting added. 16*225f5eecSMinkyu Kang */ 17*225f5eecSMinkyu Kang enum { 18*225f5eecSMinkyu Kang PINMUX_FLAG_NONE = 0x00000000, 19*225f5eecSMinkyu Kang 20*225f5eecSMinkyu Kang /* Flags for eMMC */ 21*225f5eecSMinkyu Kang PINMUX_FLAG_8BIT_MODE = 1 << 0, /* SDMMC 8-bit mode */ 22*225f5eecSMinkyu Kang 23*225f5eecSMinkyu Kang /* Flags for SROM controller */ 24*225f5eecSMinkyu Kang PINMUX_FLAG_BANK = 3 << 0, /* bank number (0-3) */ 25*225f5eecSMinkyu Kang PINMUX_FLAG_16BIT = 1 << 2, /* 16-bit width */ 26*225f5eecSMinkyu Kang }; 27*225f5eecSMinkyu Kang 28*225f5eecSMinkyu Kang /** 29*225f5eecSMinkyu Kang * Configures the pinmux for a particular peripheral. 30*225f5eecSMinkyu Kang * 31*225f5eecSMinkyu Kang * Each gpio can be configured in many different ways (4 bits on exynos) 32*225f5eecSMinkyu Kang * such as "input", "output", "special function", "external interrupt" 33*225f5eecSMinkyu Kang * etc. This function will configure the peripheral pinmux along with 34*225f5eecSMinkyu Kang * pull-up/down and drive strength. 35*225f5eecSMinkyu Kang * 36*225f5eecSMinkyu Kang * @param peripheral peripheral to be configured 37*225f5eecSMinkyu Kang * @param flags configure flags 38*225f5eecSMinkyu Kang * @return 0 if ok, -1 on error (e.g. unsupported peripheral) 39*225f5eecSMinkyu Kang */ 40*225f5eecSMinkyu Kang int exynos_pinmux_config(int peripheral, int flags); 41*225f5eecSMinkyu Kang 42*225f5eecSMinkyu Kang /** 43*225f5eecSMinkyu Kang * Decode the peripheral id using the interrpt numbers. 44*225f5eecSMinkyu Kang * 45*225f5eecSMinkyu Kang * @param blob Device tree blob 46*225f5eecSMinkyu Kang * @param node FDT I2C node to find 47*225f5eecSMinkyu Kang * @return peripheral id if ok, PERIPH_ID_NONE on error 48*225f5eecSMinkyu Kang */ 49*225f5eecSMinkyu Kang int pinmux_decode_periph_id(const void *blob, int node); 50*225f5eecSMinkyu Kang #endif 51