1 /* 2 * Copyright (C) 2012 Samsung Electronics 3 * Abhilash Kesavan <a.kesavan@samsung.com> 4 * 5 * SPDX-License-Identifier: GPL-2.0+ 6 */ 7 8 #ifndef __ASM_ARM_ARCH_PINMUX_H 9 #define __ASM_ARM_ARCH_PINMUX_H 10 11 #include "periph.h" 12 13 /* 14 * Flags for setting specific configarations of peripherals. 15 * List will grow with support for more devices getting added. 16 */ 17 enum { 18 PINMUX_FLAG_NONE = 0x00000000, 19 20 /* Flags for eMMC */ 21 PINMUX_FLAG_8BIT_MODE = 1 << 0, /* SDMMC 8-bit mode */ 22 23 /* Flags for SROM controller */ 24 PINMUX_FLAG_BANK = 3 << 0, /* bank number (0-3) */ 25 PINMUX_FLAG_16BIT = 1 << 2, /* 16-bit width */ 26 27 /* Flags for I2C */ 28 PINMUX_FLAG_HS_MODE = 1 << 1, /* I2C High Speed Mode */ 29 }; 30 31 /** 32 * Configures the pinmux for a particular peripheral. 33 * 34 * Each gpio can be configured in many different ways (4 bits on exynos) 35 * such as "input", "output", "special function", "external interrupt" 36 * etc. This function will configure the peripheral pinmux along with 37 * pull-up/down and drive strength. 38 * 39 * @param peripheral peripheral to be configured 40 * @param flags configure flags 41 * @return 0 if ok, -1 on error (e.g. unsupported peripheral) 42 */ 43 int exynos_pinmux_config(int peripheral, int flags); 44 45 /** 46 * Decode the peripheral id using the interrpt numbers. 47 * 48 * @param blob Device tree blob 49 * @param node FDT I2C node to find 50 * @return peripheral id if ok, PERIPH_ID_NONE on error 51 */ 52 int pinmux_decode_periph_id(const void *blob, int node); 53 #endif 54