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- // SPDX-License-Identifier: GPL-2.0+
- /*
- * Copyright 2004-2006,2010 Freescale Semiconductor, Inc. All Rights Reserved.
- * Copyright (C) 2008 by Sascha Hauer <kernel@pengutronix.de>
- * Copyright (C) 2009 by Jan Weitzel Phytec Messtechnik GmbH,
- * <armlinux@phytec.de>
- */
- #include <common.h>
- #include <linux/errno.h>
- #include <asm/io.h>
- #include <asm/arch/clock.h>
- #include <asm/arch/iomux.h>
- #include <asm/arch/imx-regs.h>
- #if defined(CONFIG_MX23)
- #define DRIVE_OFFSET 0x200
- #define PULL_OFFSET 0x400
- #elif defined(CONFIG_MX28)
- #define DRIVE_OFFSET 0x300
- #define PULL_OFFSET 0x600
- #else
- #error "Please select CONFIG_MX23 or CONFIG_MX28"
- #endif
- /*
- * configures a single pad in the iomuxer
- */
- int mxs_iomux_setup_pad(iomux_cfg_t pad)
- {
- u32 reg, ofs, bp, bm;
- void *iomux_base = (void *)MXS_PINCTRL_BASE;
- struct mxs_register_32 *mxs_reg;
- /* muxsel */
- ofs = 0x100;
- ofs += PAD_BANK(pad) * 0x20 + PAD_PIN(pad) / 16 * 0x10;
- bp = PAD_PIN(pad) % 16 * 2;
- bm = 0x3 << bp;
- reg = readl(iomux_base + ofs);
- reg &= ~bm;
- reg |= PAD_MUXSEL(pad) << bp;
- writel(reg, iomux_base + ofs);
- /* drive */
- ofs = DRIVE_OFFSET;
- ofs += PAD_BANK(pad) * 0x40 + PAD_PIN(pad) / 8 * 0x10;
- /* mA */
- if (PAD_MA_VALID(pad)) {
- bp = PAD_PIN(pad) % 8 * 4;
- bm = 0x3 << bp;
- reg = readl(iomux_base + ofs);
- reg &= ~bm;
- reg |= PAD_MA(pad) << bp;
- writel(reg, iomux_base + ofs);
- }
- /* vol */
- if (PAD_VOL_VALID(pad)) {
- bp = PAD_PIN(pad) % 8 * 4 + 2;
- mxs_reg = (struct mxs_register_32 *)(iomux_base + ofs);
- if (PAD_VOL(pad))
- writel(1 << bp, &mxs_reg->reg_set);
- else
- writel(1 << bp, &mxs_reg->reg_clr);
- }
- /* pull */
- if (PAD_PULL_VALID(pad)) {
- ofs = PULL_OFFSET;
- ofs += PAD_BANK(pad) * 0x10;
- bp = PAD_PIN(pad);
- mxs_reg = (struct mxs_register_32 *)(iomux_base + ofs);
- if (PAD_PULL(pad))
- writel(1 << bp, &mxs_reg->reg_set);
- else
- writel(1 << bp, &mxs_reg->reg_clr);
- }
- return 0;
- }
- int mxs_iomux_setup_multiple_pads(const iomux_cfg_t *pad_list, unsigned count)
- {
- const iomux_cfg_t *p = pad_list;
- int i;
- int ret;
- for (i = 0; i < count; i++) {
- ret = mxs_iomux_setup_pad(*p);
- if (ret)
- return ret;
- p++;
- }
- return 0;
- }
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