59 lines
1.6 KiB
C
59 lines
1.6 KiB
C
/*
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*
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* arch/arm/mach-u300/padmux.c
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*
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*
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* Copyright (C) 2009 ST-Ericsson AB
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* License terms: GNU General Public License (GPL) version 2
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* U300 PADMUX functions
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* Author: Linus Walleij <linus.walleij@stericsson.com>
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*
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*/
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#include <linux/io.h>
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#include <linux/err.h>
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#include <mach/u300-regs.h>
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#include <mach/syscon.h>
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#include "padmux.h"
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/* Set the PAD MUX to route the MMC reader correctly to GPIO0. */
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void pmx_set_mission_mode_mmc(void)
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{
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u16 val;
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val = readw(U300_SYSCON_VBASE + U300_SYSCON_PMC1LR);
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val &= ~U300_SYSCON_PMC1LR_MMCSD_MASK;
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writew(val, U300_SYSCON_VBASE + U300_SYSCON_PMC1LR);
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val = readw(U300_SYSCON_VBASE + U300_SYSCON_PMC1HR);
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val &= ~U300_SYSCON_PMC1HR_APP_GPIO_1_MASK;
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val |= U300_SYSCON_PMC1HR_APP_GPIO_1_MMC;
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writew(val, U300_SYSCON_VBASE + U300_SYSCON_PMC1HR);
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}
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void pmx_set_mission_mode_spi(void)
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{
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u16 val;
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/* Set up padmuxing so the SPI port and its chipselects are active */
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val = readw(U300_SYSCON_VBASE + U300_SYSCON_PMC1HR);
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/*
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* Activate the SPI port (disable the use of these pins for generic
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* GPIO, DSP, AAIF
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*/
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val &= ~U300_SYSCON_PMC1HR_APP_SPI_2_MASK;
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val |= U300_SYSCON_PMC1HR_APP_SPI_2_SPI;
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/*
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* Use GPIO pin SPI CS1 for CS1 actually (it can be used for other
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* things also)
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*/
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val &= ~U300_SYSCON_PMC1HR_APP_SPI_CS_1_MASK;
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val |= U300_SYSCON_PMC1HR_APP_SPI_CS_1_SPI;
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/*
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* Use GPIO pin SPI CS2 for CS2 actually (it can be used for other
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* things also)
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*/
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val &= ~U300_SYSCON_PMC1HR_APP_SPI_CS_2_MASK;
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val |= U300_SYSCON_PMC1HR_APP_SPI_CS_2_SPI;
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writew(val, U300_SYSCON_VBASE + U300_SYSCON_PMC1HR);
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}
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