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 
28 /**
29  * Configures the pinmux for a particular peripheral.
30  *
31  * Each gpio can be configured in many different ways (4 bits on exynos)
32  * such as "input", "output", "special function", "external interrupt"
33  * etc. This function will configure the peripheral pinmux along with
34  * pull-up/down and drive strength.
35  *
36  * @param peripheral	peripheral to be configured
37  * @param flags		configure flags
38  * @return 0 if ok, -1 on error (e.g. unsupported peripheral)
39  */
40 int exynos_pinmux_config(int peripheral, int flags);
41 
42 /**
43  * Decode the peripheral id using the interrpt numbers.
44  *
45  * @param blob  Device tree blob
46  * @param node  FDT I2C node to find
47  * @return peripheral id if ok, PERIPH_ID_NONE on error
48  */
49 int pinmux_decode_periph_id(const void *blob, int node);
50 #endif
51