// 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; }