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linux-next/arch/arm/mach-mx5/board-mx51_efikamx.c
Shawn Guo b78d8e59a6 gpio/mxc: Change gpio-mxc into an upstanding gpio driver 
The patch makes necessary changes on gpio-mxc as below to turn it
into an upstanding gpio driver.

 * Add a list to save all mx2 ports references, so that
   mx2_gpio_irq_handler can walk through all interrupt status
   registers

 * Use readl/writel to replace mach-specific accessors
   __raw_readl/__raw_writel

 * Change mxc_gpio_init into mxc_gpio_probe function

 * Move "struct mxc_gpio_port" into gpio-mxc.c, as it needs not to
   be public at all, and also make some other cleanup on
   plat-mxc/include/mach/gpio.h at the same time

And the patch then migrates mach-imx and mach-mx5 to the updated
driver by adding corresponding platform devices.

Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
Acked-by: Olof Johansson <olof@lixom.net>
Acked-by: Sascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2011-06-06 10:01:19 -06:00

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/*
* Copyright (C) 2010 Linaro Limited
*
* based on code from the following
* Copyright 2009-2010 Freescale Semiconductor, Inc. All Rights Reserved.
* Copyright 2009-2010 Pegatron Corporation. All Rights Reserved.
* Copyright 2009-2010 Genesi USA, Inc. All Rights Reserved.
*
* The code contained herein is licensed under the GNU General Public
* License. You may obtain a copy of the GNU General Public License
* Version 2 or later at the following locations:
*
* http://www.opensource.org/licenses/gpl-license.html
* http://www.gnu.org/copyleft/gpl.html
*/
#include <linux/init.h>
#include <linux/platform_device.h>
#include <linux/i2c.h>
#include <linux/gpio.h>
#include <linux/leds.h>
#include <linux/input.h>
#include <linux/delay.h>
#include <linux/io.h>
#include <linux/spi/flash.h>
#include <linux/spi/spi.h>
#include <linux/mfd/mc13892.h>
#include <linux/regulator/machine.h>
#include <linux/regulator/consumer.h>
#include <mach/common.h>
#include <mach/hardware.h>
#include <mach/iomux-mx51.h>
#include <asm/irq.h>
#include <asm/setup.h>
#include <asm/mach-types.h>
#include <asm/mach/arch.h>
#include <asm/mach/time.h>
#include "devices-imx51.h"
#include "devices.h"
#include "efika.h"
#define EFIKAMX_PCBID0 IMX_GPIO_NR(3, 16)
#define EFIKAMX_PCBID1 IMX_GPIO_NR(3, 17)
#define EFIKAMX_PCBID2 IMX_GPIO_NR(3, 11)
#define EFIKAMX_BLUE_LED IMX_GPIO_NR(3, 13)
#define EFIKAMX_GREEN_LED IMX_GPIO_NR(3, 14)
#define EFIKAMX_RED_LED IMX_GPIO_NR(3, 15)
#define EFIKAMX_POWER_KEY IMX_GPIO_NR(2, 31)
/* board 1.1 doesn't have same reset gpio */
#define EFIKAMX_RESET1_1 IMX_GPIO_NR(3, 2)
#define EFIKAMX_RESET IMX_GPIO_NR(1, 4)
#define EFIKAMX_POWEROFF IMX_GPIO_NR(4, 13)
#define EFIKAMX_PMIC IMX_GPIO_NR(1, 6)
/* the pci ids pin have pull up. they're driven low according to board id */
#define MX51_PAD_PCBID0 IOMUX_PAD(0x518, 0x130, 3, 0x0, 0, PAD_CTL_PUS_100K_UP)
#define MX51_PAD_PCBID1 IOMUX_PAD(0x51C, 0x134, 3, 0x0, 0, PAD_CTL_PUS_100K_UP)
#define MX51_PAD_PCBID2 IOMUX_PAD(0x504, 0x128, 3, 0x0, 0, PAD_CTL_PUS_100K_UP)
#define MX51_PAD_PWRKEY IOMUX_PAD(0x48c, 0x0f8, 1, 0x0, 0, PAD_CTL_PUS_100K_UP | PAD_CTL_PKE)
static iomux_v3_cfg_t mx51efikamx_pads[] = {
/* board id */
MX51_PAD_PCBID0,
MX51_PAD_PCBID1,
MX51_PAD_PCBID2,
/* leds */
MX51_PAD_CSI1_D9__GPIO3_13,
MX51_PAD_CSI1_VSYNC__GPIO3_14,
MX51_PAD_CSI1_HSYNC__GPIO3_15,
/* power key */
MX51_PAD_PWRKEY,
/* reset */
MX51_PAD_DI1_PIN13__GPIO3_2,
MX51_PAD_GPIO1_4__GPIO1_4,
/* power off */
MX51_PAD_CSI2_VSYNC__GPIO4_13,
};
/* PCBID2 PCBID1 PCBID0 STATE
1 1 1 ER1:rev1.1
1 1 0 ER2:rev1.2
1 0 1 ER3:rev1.3
1 0 0 ER4:rev1.4
*/
static void __init mx51_efikamx_board_id(void)
{
int id;
/* things are taking time to settle */
msleep(150);
gpio_request(EFIKAMX_PCBID0, "pcbid0");
gpio_direction_input(EFIKAMX_PCBID0);
gpio_request(EFIKAMX_PCBID1, "pcbid1");
gpio_direction_input(EFIKAMX_PCBID1);
gpio_request(EFIKAMX_PCBID2, "pcbid2");
gpio_direction_input(EFIKAMX_PCBID2);
id = gpio_get_value(EFIKAMX_PCBID0);
id |= gpio_get_value(EFIKAMX_PCBID1) << 1;
id |= gpio_get_value(EFIKAMX_PCBID2) << 2;
switch (id) {
case 7:
system_rev = 0x11;
break;
case 6:
system_rev = 0x12;
break;
case 5:
system_rev = 0x13;
break;
case 4:
system_rev = 0x14;
break;
default:
system_rev = 0x10;
break;
}
if ((system_rev == 0x10)
|| (system_rev == 0x12)
|| (system_rev == 0x14)) {
printk(KERN_WARNING
"EfikaMX: Unsupported board revision 1.%u!\n",
system_rev & 0xf);
}
}
static struct gpio_led mx51_efikamx_leds[] = {
{
.name = "efikamx:green",
.default_trigger = "default-on",
.gpio = EFIKAMX_GREEN_LED,
},
{
.name = "efikamx:red",
.default_trigger = "ide-disk",
.gpio = EFIKAMX_RED_LED,
},
{
.name = "efikamx:blue",
.default_trigger = "mmc0",
.gpio = EFIKAMX_BLUE_LED,
},
};
static struct gpio_led_platform_data mx51_efikamx_leds_data = {
.leds = mx51_efikamx_leds,
.num_leds = ARRAY_SIZE(mx51_efikamx_leds),
};
static struct platform_device mx51_efikamx_leds_device = {
.name = "leds-gpio",
.id = -1,
.dev = {
.platform_data = &mx51_efikamx_leds_data,
},
};
static struct gpio_keys_button mx51_efikamx_powerkey[] = {
{
.code = KEY_POWER,
.gpio = EFIKAMX_POWER_KEY,
.type = EV_PWR,
.desc = "Power Button (CM)",
.wakeup = 1,
.debounce_interval = 10, /* ms */
},
};
static const struct gpio_keys_platform_data mx51_efikamx_powerkey_data __initconst = {
.buttons = mx51_efikamx_powerkey,
.nbuttons = ARRAY_SIZE(mx51_efikamx_powerkey),
};
void mx51_efikamx_reset(void)
{
if (system_rev == 0x11)
gpio_direction_output(EFIKAMX_RESET1_1, 0);
else
gpio_direction_output(EFIKAMX_RESET, 0);
}
static struct regulator *pwgt1, *pwgt2, *coincell;
static void mx51_efikamx_power_off(void)
{
if (!IS_ERR(coincell))
regulator_disable(coincell);
if (!IS_ERR(pwgt1) && !IS_ERR(pwgt2)) {
regulator_disable(pwgt2);
regulator_disable(pwgt1);
}
gpio_direction_output(EFIKAMX_POWEROFF, 1);
}
static int __init mx51_efikamx_power_init(void)
{
if (machine_is_mx51_efikamx()) {
pwgt1 = regulator_get(NULL, "pwgt1");
pwgt2 = regulator_get(NULL, "pwgt2");
if (!IS_ERR(pwgt1) && !IS_ERR(pwgt2)) {
regulator_enable(pwgt1);
regulator_enable(pwgt2);
}
gpio_request(EFIKAMX_POWEROFF, "poweroff");
pm_power_off = mx51_efikamx_power_off;
/* enable coincell charger. maybe need a small power driver ? */
coincell = regulator_get(NULL, "coincell");
if (!IS_ERR(coincell)) {
regulator_set_voltage(coincell, 3000000, 3000000);
regulator_enable(coincell);
}
regulator_has_full_constraints();
}
return 0;
}
late_initcall(mx51_efikamx_power_init);
static void __init mx51_efikamx_init(void)
{
imx51_soc_init();
mxc_iomux_v3_setup_multiple_pads(mx51efikamx_pads,
ARRAY_SIZE(mx51efikamx_pads));
efika_board_common_init();
mx51_efikamx_board_id();
/* on < 1.2 boards both SD controllers are used */
if (system_rev < 0x12) {
imx51_add_sdhci_esdhc_imx(1, NULL);
mx51_efikamx_leds[2].default_trigger = "mmc1";
}
platform_device_register(&mx51_efikamx_leds_device);
imx_add_gpio_keys(&mx51_efikamx_powerkey_data);
if (system_rev == 0x11) {
gpio_request(EFIKAMX_RESET1_1, "reset");
gpio_direction_output(EFIKAMX_RESET1_1, 1);
} else {
gpio_request(EFIKAMX_RESET, "reset");
gpio_direction_output(EFIKAMX_RESET, 1);
}
/*
* enable wifi by default only on mx
* sb and mx have same wlan pin but the value to enable it are
* different :/
*/
gpio_request(EFIKA_WLAN_EN, "wlan_en");
gpio_direction_output(EFIKA_WLAN_EN, 0);
msleep(10);
gpio_request(EFIKA_WLAN_RESET, "wlan_rst");
gpio_direction_output(EFIKA_WLAN_RESET, 0);
msleep(10);
gpio_set_value(EFIKA_WLAN_RESET, 1);
}
static void __init mx51_efikamx_timer_init(void)
{
mx51_clocks_init(32768, 24000000, 22579200, 24576000);
}
static struct sys_timer mx51_efikamx_timer = {
.init = mx51_efikamx_timer_init,
};
MACHINE_START(MX51_EFIKAMX, "Genesi EfikaMX nettop")
/* Maintainer: Amit Kucheria <amit.kucheria@linaro.org> */
.boot_params = MX51_PHYS_OFFSET + 0x100,
.map_io = mx51_map_io,
.init_early = imx51_init_early,
.init_irq = mx51_init_irq,
.timer = &mx51_efikamx_timer,
.init_machine = mx51_efikamx_init,
MACHINE_END
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