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kernel-ark/arch/arm/mach-mxs/mach-mx23evk.c
Fabio Estevam c7dae1812a ARM: mxs/mach-mx2[38]evk: Set the initial value on gpio_request_one 
Current code does not set the GPIO value to zero as mentioned in the comment.

Fix it by setting the initial GPIO value to zero.

Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
LAKML-Reference: 1301427910-31726-1-git-send-email-fabio.estevam@freescale.com
[ukleinek: squashed two patches together fixing both boards at once]
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
2011-05-19 13:11:10 +02:00

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/*
* Copyright 2010 Freescale Semiconductor, Inc. All Rights Reserved.
*
* 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.
*/
#include <linux/delay.h>
#include <linux/platform_device.h>
#include <linux/gpio.h>
#include <linux/irq.h>
#include <asm/mach-types.h>
#include <asm/mach/arch.h>
#include <asm/mach/time.h>
#include <mach/common.h>
#include <mach/iomux-mx23.h>
#include "devices-mx23.h"
#define MX23EVK_LCD_ENABLE MXS_GPIO_NR(1, 18)
#define MX23EVK_BL_ENABLE MXS_GPIO_NR(1, 28)
#define MX23EVK_MMC0_WRITE_PROTECT MXS_GPIO_NR(1, 30)
#define MX23EVK_MMC0_SLOT_POWER MXS_GPIO_NR(1, 29)
static const iomux_cfg_t mx23evk_pads[] __initconst = {
/* duart */
MX23_PAD_PWM0__DUART_RX | MXS_PAD_CTRL,
MX23_PAD_PWM1__DUART_TX | MXS_PAD_CTRL,
/* auart */
MX23_PAD_AUART1_RX__AUART1_RX | MXS_PAD_CTRL,
MX23_PAD_AUART1_TX__AUART1_TX | MXS_PAD_CTRL,
MX23_PAD_AUART1_CTS__AUART1_CTS | MXS_PAD_CTRL,
MX23_PAD_AUART1_RTS__AUART1_RTS | MXS_PAD_CTRL,
/* mxsfb (lcdif) */
MX23_PAD_LCD_D00__LCD_D00 | MXS_PAD_CTRL,
MX23_PAD_LCD_D01__LCD_D01 | MXS_PAD_CTRL,
MX23_PAD_LCD_D02__LCD_D02 | MXS_PAD_CTRL,
MX23_PAD_LCD_D03__LCD_D03 | MXS_PAD_CTRL,
MX23_PAD_LCD_D04__LCD_D04 | MXS_PAD_CTRL,
MX23_PAD_LCD_D05__LCD_D05 | MXS_PAD_CTRL,
MX23_PAD_LCD_D06__LCD_D06 | MXS_PAD_CTRL,
MX23_PAD_LCD_D07__LCD_D07 | MXS_PAD_CTRL,
MX23_PAD_LCD_D08__LCD_D08 | MXS_PAD_CTRL,
MX23_PAD_LCD_D09__LCD_D09 | MXS_PAD_CTRL,
MX23_PAD_LCD_D10__LCD_D10 | MXS_PAD_CTRL,
MX23_PAD_LCD_D11__LCD_D11 | MXS_PAD_CTRL,
MX23_PAD_LCD_D12__LCD_D12 | MXS_PAD_CTRL,
MX23_PAD_LCD_D13__LCD_D13 | MXS_PAD_CTRL,
MX23_PAD_LCD_D14__LCD_D14 | MXS_PAD_CTRL,
MX23_PAD_LCD_D15__LCD_D15 | MXS_PAD_CTRL,
MX23_PAD_LCD_D16__LCD_D16 | MXS_PAD_CTRL,
MX23_PAD_LCD_D17__LCD_D17 | MXS_PAD_CTRL,
MX23_PAD_GPMI_D08__LCD_D18 | MXS_PAD_CTRL,
MX23_PAD_GPMI_D09__LCD_D19 | MXS_PAD_CTRL,
MX23_PAD_GPMI_D10__LCD_D20 | MXS_PAD_CTRL,
MX23_PAD_GPMI_D11__LCD_D21 | MXS_PAD_CTRL,
MX23_PAD_GPMI_D12__LCD_D22 | MXS_PAD_CTRL,
MX23_PAD_GPMI_D13__LCD_D23 | MXS_PAD_CTRL,
MX23_PAD_LCD_VSYNC__LCD_VSYNC | MXS_PAD_CTRL,
MX23_PAD_LCD_HSYNC__LCD_HSYNC | MXS_PAD_CTRL,
MX23_PAD_LCD_DOTCK__LCD_DOTCK | MXS_PAD_CTRL,
MX23_PAD_LCD_ENABLE__LCD_ENABLE | MXS_PAD_CTRL,
/* LCD panel enable */
MX23_PAD_LCD_RESET__GPIO_1_18 | MXS_PAD_CTRL,
/* backlight control */
MX23_PAD_PWM2__GPIO_1_28 | MXS_PAD_CTRL,
/* mmc */
MX23_PAD_SSP1_DATA0__SSP1_DATA0 |
(MXS_PAD_8MA | MXS_PAD_3V3 | MXS_PAD_PULLUP),
MX23_PAD_SSP1_DATA1__SSP1_DATA1 |
(MXS_PAD_8MA | MXS_PAD_3V3 | MXS_PAD_PULLUP),
MX23_PAD_SSP1_DATA2__SSP1_DATA2 |
(MXS_PAD_8MA | MXS_PAD_3V3 | MXS_PAD_PULLUP),
MX23_PAD_SSP1_DATA3__SSP1_DATA3 |
(MXS_PAD_8MA | MXS_PAD_3V3 | MXS_PAD_PULLUP),
MX23_PAD_GPMI_D08__SSP1_DATA4 |
(MXS_PAD_8MA | MXS_PAD_3V3 | MXS_PAD_PULLUP),
MX23_PAD_GPMI_D09__SSP1_DATA5 |
(MXS_PAD_8MA | MXS_PAD_3V3 | MXS_PAD_PULLUP),
MX23_PAD_GPMI_D10__SSP1_DATA6 |
(MXS_PAD_8MA | MXS_PAD_3V3 | MXS_PAD_PULLUP),
MX23_PAD_GPMI_D11__SSP1_DATA7 |
(MXS_PAD_8MA | MXS_PAD_3V3 | MXS_PAD_PULLUP),
MX23_PAD_SSP1_CMD__SSP1_CMD |
(MXS_PAD_8MA | MXS_PAD_3V3 | MXS_PAD_PULLUP),
MX23_PAD_SSP1_DETECT__SSP1_DETECT |
(MXS_PAD_8MA | MXS_PAD_3V3 | MXS_PAD_NOPULL),
MX23_PAD_SSP1_SCK__SSP1_SCK |
(MXS_PAD_8MA | MXS_PAD_3V3 | MXS_PAD_NOPULL),
/* write protect */
MX23_PAD_PWM4__GPIO_1_30 |
(MXS_PAD_4MA | MXS_PAD_3V3 | MXS_PAD_NOPULL),
/* slot power enable */
MX23_PAD_PWM3__GPIO_1_29 |
(MXS_PAD_4MA | MXS_PAD_3V3 | MXS_PAD_NOPULL),
};
/* mxsfb (lcdif) */
static struct fb_videomode mx23evk_video_modes[] = {
{
.name = "Samsung-LMS430HF02",
.refresh = 60,
.xres = 480,
.yres = 272,
.pixclock = 108096, /* picosecond (9.2 MHz) */
.left_margin = 15,
.right_margin = 8,
.upper_margin = 12,
.lower_margin = 4,
.hsync_len = 1,
.vsync_len = 1,
.sync = FB_SYNC_DATA_ENABLE_HIGH_ACT |
FB_SYNC_DOTCLK_FAILING_ACT,
},
};
static const struct mxsfb_platform_data mx23evk_mxsfb_pdata __initconst = {
.mode_list = mx23evk_video_modes,
.mode_count = ARRAY_SIZE(mx23evk_video_modes),
.default_bpp = 32,
.ld_intf_width = STMLCDIF_24BIT,
};
static struct mxs_mmc_platform_data mx23evk_mmc_pdata __initdata = {
.wp_gpio = MX23EVK_MMC0_WRITE_PROTECT,
.flags = SLOTF_8_BIT_CAPABLE,
};
static void __init mx23evk_init(void)
{
int ret;
mxs_iomux_setup_multiple_pads(mx23evk_pads, ARRAY_SIZE(mx23evk_pads));
mx23_add_duart();
mx23_add_auart0();
/* power on mmc slot by writing 0 to the gpio */
ret = gpio_request_one(MX23EVK_MMC0_SLOT_POWER, GPIOF_OUT_INIT_LOW,
"mmc0-slot-power");
if (ret)
pr_warn("failed to request gpio mmc0-slot-power: %d\n", ret);
mx23_add_mxs_mmc(0, &mx23evk_mmc_pdata);
ret = gpio_request_one(MX23EVK_LCD_ENABLE, GPIOF_DIR_OUT, "lcd-enable");
if (ret)
pr_warn("failed to request gpio lcd-enable: %d\n", ret);
else
gpio_set_value(MX23EVK_LCD_ENABLE, 1);
ret = gpio_request_one(MX23EVK_BL_ENABLE, GPIOF_DIR_OUT, "bl-enable");
if (ret)
pr_warn("failed to request gpio bl-enable: %d\n", ret);
else
gpio_set_value(MX23EVK_BL_ENABLE, 1);
mx23_add_mxsfb(&mx23evk_mxsfb_pdata);
}
static void __init mx23evk_timer_init(void)
{
mx23_clocks_init();
}
static struct sys_timer mx23evk_timer = {
.init = mx23evk_timer_init,
};
MACHINE_START(MX23EVK, "Freescale MX23 EVK")
/* Maintainer: Freescale Semiconductor, Inc. */
.map_io = mx23_map_io,
.init_irq = mx23_init_irq,
.init_machine = mx23evk_init,
.timer = &mx23evk_timer,
MACHINE_END
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