1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3  * Copyright 2020-2021 NXP
4  */
5 
6 #include <common.h>
7 #include <asm/io.h>
8 #include <asm/arch/imx-regs.h>
9 #include <asm/arch/iomux.h>
10 
11 static void *base = (void *)IOMUXC_BASE_ADDR;
12 static void *base_mports = (void *)(0x280A1000);
13 
14 /*
15  * configures a single pad in the iomuxer
16  */
imx8ulp_iomux_setup_pad(iomux_cfg_t pad)17 void imx8ulp_iomux_setup_pad(iomux_cfg_t pad)
18 {
19 	u32 mux_ctrl_ofs = (pad & MUX_CTRL_OFS_MASK) >> MUX_CTRL_OFS_SHIFT;
20 	u32 mux_mode = (pad & MUX_MODE_MASK) >> MUX_MODE_SHIFT;
21 	u32 sel_input_ofs =
22 		(pad & MUX_SEL_INPUT_OFS_MASK) >> MUX_SEL_INPUT_OFS_SHIFT;
23 	u32 sel_input =
24 		(pad & MUX_SEL_INPUT_MASK) >> MUX_SEL_INPUT_SHIFT;
25 	u32 pad_ctrl_ofs = mux_ctrl_ofs;
26 	u32 pad_ctrl = (pad & MUX_PAD_CTRL_MASK) >> MUX_PAD_CTRL_SHIFT;
27 
28 	if (mux_mode & IOMUX_CONFIG_MPORTS) {
29 		mux_mode &= ~IOMUX_CONFIG_MPORTS;
30 		base = base_mports;
31 	} else {
32 		base = (void *)IOMUXC_BASE_ADDR;
33 	}
34 
35 	__raw_writel(((mux_mode << IOMUXC_PCR_MUX_ALT_SHIFT) &
36 		     IOMUXC_PCR_MUX_ALT_MASK), base + mux_ctrl_ofs);
37 
38 	if (sel_input_ofs)
39 		__raw_writel((sel_input << IOMUXC_PSMI_IMUX_ALT_SHIFT), base + sel_input_ofs);
40 
41 	if (!(pad_ctrl & NO_PAD_CTRL))
42 		__raw_writel(((mux_mode << IOMUXC_PCR_MUX_ALT_SHIFT) &
43 			     IOMUXC_PCR_MUX_ALT_MASK) |
44 			     (pad_ctrl & (~IOMUXC_PCR_MUX_ALT_MASK)),
45 			     base + pad_ctrl_ofs);
46 }
47 
48 /* configures a list of pads within declared with IOMUX_PADS macro */
imx8ulp_iomux_setup_multiple_pads(iomux_cfg_t const * pad_list,u32 count)49 void imx8ulp_iomux_setup_multiple_pads(iomux_cfg_t const *pad_list, u32 count)
50 {
51 	iomux_cfg_t const *p = pad_list;
52 	int i;
53 
54 	for (i = 0; i < count; i++) {
55 		imx8ulp_iomux_setup_pad(*p);
56 		p++;
57 	}
58 }
59