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4ed9bb2184
The change moves some of peripheral registrations and initializations (all peripherals dependent on GPIOs) from .init_machine to .init_late level, this allows to safely shift the shared GPIO controller driver initialization level after init level of i.MX IOMUXC driver. Signed-off-by: Vladimir Zapolskiy <vz@mleia.com> Signed-off-by: Shawn Guo <shawnguo@kernel.org>
164 lines
4.3 KiB
C
164 lines
4.3 KiB
C
/*
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* LogicPD i.MX31 SOM-LV development board support
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*
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* Copyright (c) 2009 Daniel Mack <daniel@caiaq.de>
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*
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* based on code for other MX31 boards,
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*
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* Copyright 2005-2007 Freescale Semiconductor
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* Copyright (c) 2009 Alberto Panizzo <maramaopercheseimorto@gmail.com>
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* Copyright (C) 2009 Valentin Longchamp, EPFL Mobots group
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#include <linux/kernel.h>
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#include <linux/types.h>
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#include <linux/init.h>
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#include <linux/gpio.h>
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#include <linux/leds.h>
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#include <linux/platform_device.h>
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#include <asm/mach-types.h>
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#include <asm/mach/arch.h>
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#include <asm/mach/map.h>
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#include "board-mx31lite.h"
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#include "common.h"
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#include "devices-imx31.h"
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#include "hardware.h"
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#include "iomux-mx3.h"
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/*
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* This file contains board-specific initialization routines for the
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* LogicPD i.MX31 SOM-LV development board, aka 'LiteKit'.
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* If you design an own baseboard for the module, use this file as base
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* for support code.
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*/
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static unsigned int litekit_db_board_pins[] __initdata = {
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/* SDHC1 */
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MX31_PIN_SD1_DATA0__SD1_DATA0,
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MX31_PIN_SD1_DATA1__SD1_DATA1,
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MX31_PIN_SD1_DATA2__SD1_DATA2,
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MX31_PIN_SD1_DATA3__SD1_DATA3,
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MX31_PIN_SD1_CLK__SD1_CLK,
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MX31_PIN_SD1_CMD__SD1_CMD,
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};
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/* MMC */
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static int gpio_det, gpio_wp;
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#define MMC_PAD_CFG (PAD_CTL_DRV_MAX | PAD_CTL_SRE_FAST | PAD_CTL_HYS_CMOS | \
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PAD_CTL_ODE_CMOS)
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static int mxc_mmc1_get_ro(struct device *dev)
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{
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return gpio_get_value(IOMUX_TO_GPIO(MX31_PIN_GPIO1_6));
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}
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static int mxc_mmc1_init(struct device *dev,
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irq_handler_t detect_irq, void *data)
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{
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int ret;
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gpio_det = IOMUX_TO_GPIO(MX31_PIN_DCD_DCE1);
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gpio_wp = IOMUX_TO_GPIO(MX31_PIN_GPIO1_6);
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mxc_iomux_set_pad(MX31_PIN_SD1_DATA0,
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MMC_PAD_CFG | PAD_CTL_PUE_PUD | PAD_CTL_100K_PU);
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mxc_iomux_set_pad(MX31_PIN_SD1_DATA1,
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MMC_PAD_CFG | PAD_CTL_PUE_PUD | PAD_CTL_100K_PU);
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mxc_iomux_set_pad(MX31_PIN_SD1_DATA2,
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MMC_PAD_CFG | PAD_CTL_PUE_PUD | PAD_CTL_100K_PU);
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mxc_iomux_set_pad(MX31_PIN_SD1_DATA3,
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MMC_PAD_CFG | PAD_CTL_PUE_PUD | PAD_CTL_100K_PU);
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mxc_iomux_set_pad(MX31_PIN_SD1_CMD,
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MMC_PAD_CFG | PAD_CTL_PUE_PUD | PAD_CTL_100K_PU);
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mxc_iomux_set_pad(MX31_PIN_SD1_CLK, MMC_PAD_CFG);
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ret = gpio_request(gpio_det, "MMC detect");
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if (ret)
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return ret;
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ret = gpio_request(gpio_wp, "MMC w/p");
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if (ret)
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goto exit_free_det;
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gpio_direction_input(gpio_det);
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gpio_direction_input(gpio_wp);
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ret = request_irq(gpio_to_irq(IOMUX_TO_GPIO(MX31_PIN_DCD_DCE1)),
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detect_irq,
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IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING,
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"MMC detect", data);
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if (ret)
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goto exit_free_wp;
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return 0;
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exit_free_wp:
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gpio_free(gpio_wp);
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exit_free_det:
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gpio_free(gpio_det);
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return ret;
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}
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static void mxc_mmc1_exit(struct device *dev, void *data)
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{
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gpio_free(gpio_det);
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gpio_free(gpio_wp);
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free_irq(gpio_to_irq(IOMUX_TO_GPIO(MX31_PIN_DCD_DCE1)), data);
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}
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static const struct imxmmc_platform_data mmc_pdata __initconst = {
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.get_ro = mxc_mmc1_get_ro,
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.init = mxc_mmc1_init,
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.exit = mxc_mmc1_exit,
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};
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/* GPIO LEDs */
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static const struct gpio_led litekit_leds[] __initconst = {
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{
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.name = "GPIO0",
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.gpio = IOMUX_TO_GPIO(MX31_PIN_COMPARE),
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.active_low = 1,
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.default_state = LEDS_GPIO_DEFSTATE_OFF,
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},
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{
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.name = "GPIO1",
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.gpio = IOMUX_TO_GPIO(MX31_PIN_CAPTURE),
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.active_low = 1,
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.default_state = LEDS_GPIO_DEFSTATE_OFF,
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}
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};
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static const struct gpio_led_platform_data
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litekit_led_platform_data __initconst = {
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.leds = litekit_leds,
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.num_leds = ARRAY_SIZE(litekit_leds),
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};
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void __init mx31lite_db_init(void)
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{
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mxc_iomux_setup_multiple_pins(litekit_db_board_pins,
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ARRAY_SIZE(litekit_db_board_pins),
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"development board pins");
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imx31_add_mxc_mmc(0, &mmc_pdata);
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gpio_led_register_device(-1, &litekit_led_platform_data);
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imx31_add_imx2_wdt();
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imx31_add_mxc_rtc();
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}
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