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83d290c56f
When U-Boot started using SPDX tags we were among the early adopters and there weren't a lot of other examples to borrow from. So we picked the area of the file that usually had a full license text and replaced it with an appropriate SPDX-License-Identifier: entry. Since then, the Linux Kernel has adopted SPDX tags and they place it as the very first line in a file (except where shebangs are used, then it's second line) and with slightly different comment styles than us. In part due to community overlap, in part due to better tag visibility and in part for other minor reasons, switch over to that style. This commit changes all instances where we have a single declared license in the tag as both the before and after are identical in tag contents. There's also a few places where I found we did not have a tag and have introduced one. Signed-off-by: Tom Rini <trini@konsulko.com>
97 lines
2.1 KiB
C
97 lines
2.1 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Copyright 2004-2006,2010 Freescale Semiconductor, Inc. All Rights Reserved.
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* Copyright (C) 2008 by Sascha Hauer <kernel@pengutronix.de>
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* Copyright (C) 2009 by Jan Weitzel Phytec Messtechnik GmbH,
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* <armlinux@phytec.de>
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*/
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#include <common.h>
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#include <linux/errno.h>
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#include <asm/io.h>
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#include <asm/arch/clock.h>
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#include <asm/arch/iomux.h>
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#include <asm/arch/imx-regs.h>
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#if defined(CONFIG_MX23)
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#define DRIVE_OFFSET 0x200
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#define PULL_OFFSET 0x400
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#elif defined(CONFIG_MX28)
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#define DRIVE_OFFSET 0x300
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#define PULL_OFFSET 0x600
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#else
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#error "Please select CONFIG_MX23 or CONFIG_MX28"
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#endif
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/*
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* configures a single pad in the iomuxer
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*/
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int mxs_iomux_setup_pad(iomux_cfg_t pad)
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{
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u32 reg, ofs, bp, bm;
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void *iomux_base = (void *)MXS_PINCTRL_BASE;
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struct mxs_register_32 *mxs_reg;
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/* muxsel */
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ofs = 0x100;
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ofs += PAD_BANK(pad) * 0x20 + PAD_PIN(pad) / 16 * 0x10;
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bp = PAD_PIN(pad) % 16 * 2;
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bm = 0x3 << bp;
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reg = readl(iomux_base + ofs);
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reg &= ~bm;
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reg |= PAD_MUXSEL(pad) << bp;
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writel(reg, iomux_base + ofs);
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/* drive */
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ofs = DRIVE_OFFSET;
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ofs += PAD_BANK(pad) * 0x40 + PAD_PIN(pad) / 8 * 0x10;
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/* mA */
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if (PAD_MA_VALID(pad)) {
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bp = PAD_PIN(pad) % 8 * 4;
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bm = 0x3 << bp;
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reg = readl(iomux_base + ofs);
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reg &= ~bm;
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reg |= PAD_MA(pad) << bp;
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writel(reg, iomux_base + ofs);
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}
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/* vol */
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if (PAD_VOL_VALID(pad)) {
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bp = PAD_PIN(pad) % 8 * 4 + 2;
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mxs_reg = (struct mxs_register_32 *)(iomux_base + ofs);
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if (PAD_VOL(pad))
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writel(1 << bp, &mxs_reg->reg_set);
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else
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writel(1 << bp, &mxs_reg->reg_clr);
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}
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/* pull */
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if (PAD_PULL_VALID(pad)) {
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ofs = PULL_OFFSET;
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ofs += PAD_BANK(pad) * 0x10;
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bp = PAD_PIN(pad);
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mxs_reg = (struct mxs_register_32 *)(iomux_base + ofs);
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if (PAD_PULL(pad))
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writel(1 << bp, &mxs_reg->reg_set);
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else
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writel(1 << bp, &mxs_reg->reg_clr);
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}
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return 0;
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}
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int mxs_iomux_setup_multiple_pads(const iomux_cfg_t *pad_list, unsigned count)
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{
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const iomux_cfg_t *p = pad_list;
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int i;
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int ret;
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for (i = 0; i < count; i++) {
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ret = mxs_iomux_setup_pad(*p);
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if (ret)
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return ret;
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p++;
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}
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return 0;
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}
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