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git.ipfire.org Git - people/ms/u-boot.git/blob - arch/arm/cpu/arm926ejs/mxs/iomux.c
2 * Copyright 2004-2006,2010 Freescale Semiconductor, Inc. All Rights Reserved.
3 * Copyright (C) 2008 by Sascha Hauer <kernel@pengutronix.de>
4 * Copyright (C) 2009 by Jan Weitzel Phytec Messtechnik GmbH,
7 * SPDX-License-Identifier: GPL-2.0+
11 #include <asm/errno.h>
13 #include <asm/arch/clock.h>
14 #include <asm/arch/iomux.h>
15 #include <asm/arch/imx-regs.h>
17 #if defined(CONFIG_MX23)
18 #define DRIVE_OFFSET 0x200
19 #define PULL_OFFSET 0x400
20 #elif defined(CONFIG_MX28)
21 #define DRIVE_OFFSET 0x300
22 #define PULL_OFFSET 0x600
24 #error "Please select CONFIG_MX23 or CONFIG_MX28"
28 * configures a single pad in the iomuxer
30 int mxs_iomux_setup_pad(iomux_cfg_t pad
)
33 void *iomux_base
= (void *)MXS_PINCTRL_BASE
;
34 struct mxs_register_32
*mxs_reg
;
38 ofs
+= PAD_BANK(pad
) * 0x20 + PAD_PIN(pad
) / 16 * 0x10;
39 bp
= PAD_PIN(pad
) % 16 * 2;
41 reg
= readl(iomux_base
+ ofs
);
43 reg
|= PAD_MUXSEL(pad
) << bp
;
44 writel(reg
, iomux_base
+ ofs
);
48 ofs
+= PAD_BANK(pad
) * 0x40 + PAD_PIN(pad
) / 8 * 0x10;
50 if (PAD_MA_VALID(pad
)) {
51 bp
= PAD_PIN(pad
) % 8 * 4;
53 reg
= readl(iomux_base
+ ofs
);
55 reg
|= PAD_MA(pad
) << bp
;
56 writel(reg
, iomux_base
+ ofs
);
59 if (PAD_VOL_VALID(pad
)) {
60 bp
= PAD_PIN(pad
) % 8 * 4 + 2;
61 mxs_reg
= (struct mxs_register_32
*)(iomux_base
+ ofs
);
63 writel(1 << bp
, &mxs_reg
->reg_set
);
65 writel(1 << bp
, &mxs_reg
->reg_clr
);
69 if (PAD_PULL_VALID(pad
)) {
71 ofs
+= PAD_BANK(pad
) * 0x10;
73 mxs_reg
= (struct mxs_register_32
*)(iomux_base
+ ofs
);
75 writel(1 << bp
, &mxs_reg
->reg_set
);
77 writel(1 << bp
, &mxs_reg
->reg_clr
);
83 int mxs_iomux_setup_multiple_pads(const iomux_cfg_t
*pad_list
, unsigned count
)
85 const iomux_cfg_t
*p
= pad_list
;
89 for (i
= 0; i
< count
; i
++) {
90 ret
= mxs_iomux_setup_pad(*p
);