Mirrors/u-boot
1
0
Fork 0
mirror of https://source.denx.de/u-boot/u-boot.git synced 2026-06-13 15:03:58 +03:00
Code Issues Packages Projects Releases Wiki Activity

iMX28: Add PINMUX control

Browse Source 
Taken from Linux kernel with minor modifications:

commit bf985969e27b507f734435a99df8bf745a3dbb2b
Author: Shawn Guo <shawn.guo@freescale.com>
Date:   Mon Dec 20 22:57:43 2010 +0800

    ARM: mxs: Add iomux support

Signed-off-by: Marek Vasut <marek.vasut@gmail.com>
Cc: Stefano Babic <sbabic@denx.de>
Cc: Wolfgang Denk <wd@denx.de>
Cc: Detlev Zundel <dzu@denx.de>
This commit is contained in:
Marek Vasut
2011-11-08 23:18:11 +00:00
committed by Stefano Babic
parent be7e87e2dd
commit d91a672b6d
4 changed files with 815 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files

2
arch/arm/cpu/arm926ejs/mx28/Makefile
View File

@@ -25,7 +25,7 @@ include $(TOPDIR)/config.mk
LIB = $(obj)lib$(SOC).o
COBJS = clock.o mx28.o timer.o
COBJS = clock.o mx28.o iomux.o timer.o
SRCS := $(START:.o=.S) $(COBJS:.o=.c)
OBJS := $(addprefix $(obj),$(COBJS))

109
arch/arm/cpu/arm926ejs/mx28/iomux.c Normal file
View File

@@ -0,0 +1,109 @@
/*
* 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>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
* MA 02110-1301, USA.
*/
#include <common.h>
#include <asm/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 mx28_register *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 mx28_register *)(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 mx28_register *)(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;
}