forked from Minki/linux
2432cff0fc
This patch declares regulators for the efikamx. Use it also to power off the efikamx. Unfortunately, on the efikamx to2 boards, this doesn't work but they allow to power off by setting GPIO 4 13 to high level instead of powering off through the mc13892. Signed-off-by: Arnaud Patard <arnaud.patard@rtp-net.org> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
298 lines
7.2 KiB
C
298 lines
7.2 KiB
C
/*
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* Copyright (C) 2010 Linaro Limited
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*
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* based on code from the following
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* Copyright 2009-2010 Freescale Semiconductor, Inc. All Rights Reserved.
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* Copyright 2009-2010 Pegatron Corporation. All Rights Reserved.
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* Copyright 2009-2010 Genesi USA, Inc. All Rights Reserved.
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*
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* The code contained herein is licensed under the GNU General Public
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* License. You may obtain a copy of the GNU General Public License
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* Version 2 or later at the following locations:
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*
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* http://www.opensource.org/licenses/gpl-license.html
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* http://www.gnu.org/copyleft/gpl.html
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*/
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#include <linux/init.h>
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#include <linux/platform_device.h>
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#include <linux/i2c.h>
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#include <linux/gpio.h>
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#include <linux/leds.h>
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#include <linux/input.h>
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#include <linux/delay.h>
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#include <linux/io.h>
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#include <linux/fsl_devices.h>
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#include <linux/spi/flash.h>
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#include <linux/spi/spi.h>
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#include <linux/mfd/mc13892.h>
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#include <linux/regulator/machine.h>
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#include <linux/regulator/consumer.h>
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#include <mach/common.h>
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#include <mach/hardware.h>
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#include <mach/iomux-mx51.h>
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#include <mach/i2c.h>
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#include <mach/mxc_ehci.h>
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#include <asm/irq.h>
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#include <asm/setup.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/time.h>
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#include "devices-imx51.h"
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#include "devices.h"
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#include "efika.h"
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#define EFIKAMX_PCBID0 IMX_GPIO_NR(3, 16)
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#define EFIKAMX_PCBID1 IMX_GPIO_NR(3, 17)
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#define EFIKAMX_PCBID2 IMX_GPIO_NR(3, 11)
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#define EFIKAMX_BLUE_LED IMX_GPIO_NR(3, 13)
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#define EFIKAMX_GREEN_LED IMX_GPIO_NR(3, 14)
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#define EFIKAMX_RED_LED IMX_GPIO_NR(3, 15)
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#define EFIKAMX_POWER_KEY IMX_GPIO_NR(2, 31)
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/* board 1.1 doesn't have same reset gpio */
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#define EFIKAMX_RESET1_1 IMX_GPIO_NR(3, 2)
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#define EFIKAMX_RESET IMX_GPIO_NR(1, 4)
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#define EFIKAMX_POWEROFF IMX_GPIO_NR(4, 13)
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#define EFIKAMX_PMIC IMX_GPIO_NR(1, 6)
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/* the pci ids pin have pull up. they're driven low according to board id */
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#define MX51_PAD_PCBID0 IOMUX_PAD(0x518, 0x130, 3, 0x0, 0, PAD_CTL_PUS_100K_UP)
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#define MX51_PAD_PCBID1 IOMUX_PAD(0x51C, 0x134, 3, 0x0, 0, PAD_CTL_PUS_100K_UP)
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#define MX51_PAD_PCBID2 IOMUX_PAD(0x504, 0x128, 3, 0x0, 0, PAD_CTL_PUS_100K_UP)
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#define MX51_PAD_PWRKEY IOMUX_PAD(0x48c, 0x0f8, 1, 0x0, 0, PAD_CTL_PUS_100K_UP | PAD_CTL_PKE)
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static iomux_v3_cfg_t mx51efikamx_pads[] = {
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/* board id */
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MX51_PAD_PCBID0,
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MX51_PAD_PCBID1,
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MX51_PAD_PCBID2,
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/* leds */
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MX51_PAD_CSI1_D9__GPIO3_13,
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MX51_PAD_CSI1_VSYNC__GPIO3_14,
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MX51_PAD_CSI1_HSYNC__GPIO3_15,
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/* power key */
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MX51_PAD_PWRKEY,
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/* reset */
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MX51_PAD_DI1_PIN13__GPIO3_2,
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MX51_PAD_GPIO1_4__GPIO1_4,
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/* power off */
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MX51_PAD_CSI2_VSYNC__GPIO4_13,
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};
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/* PCBID2 PCBID1 PCBID0 STATE
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1 1 1 ER1:rev1.1
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1 1 0 ER2:rev1.2
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1 0 1 ER3:rev1.3
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1 0 0 ER4:rev1.4
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*/
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static void __init mx51_efikamx_board_id(void)
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{
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int id;
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/* things are taking time to settle */
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msleep(150);
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gpio_request(EFIKAMX_PCBID0, "pcbid0");
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gpio_direction_input(EFIKAMX_PCBID0);
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gpio_request(EFIKAMX_PCBID1, "pcbid1");
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gpio_direction_input(EFIKAMX_PCBID1);
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gpio_request(EFIKAMX_PCBID2, "pcbid2");
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gpio_direction_input(EFIKAMX_PCBID2);
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id = gpio_get_value(EFIKAMX_PCBID0);
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id |= gpio_get_value(EFIKAMX_PCBID1) << 1;
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id |= gpio_get_value(EFIKAMX_PCBID2) << 2;
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switch (id) {
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case 7:
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system_rev = 0x11;
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break;
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case 6:
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system_rev = 0x12;
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break;
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case 5:
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system_rev = 0x13;
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break;
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case 4:
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system_rev = 0x14;
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break;
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default:
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system_rev = 0x10;
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break;
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}
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if ((system_rev == 0x10)
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|| (system_rev == 0x12)
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|| (system_rev == 0x14)) {
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printk(KERN_WARNING
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"EfikaMX: Unsupported board revision 1.%u!\n",
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system_rev & 0xf);
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}
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}
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static struct gpio_led mx51_efikamx_leds[] = {
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{
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.name = "efikamx:green",
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.default_trigger = "default-on",
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.gpio = EFIKAMX_GREEN_LED,
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},
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{
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.name = "efikamx:red",
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.default_trigger = "ide-disk",
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.gpio = EFIKAMX_RED_LED,
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},
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{
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.name = "efikamx:blue",
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.default_trigger = "mmc0",
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.gpio = EFIKAMX_BLUE_LED,
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},
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};
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static struct gpio_led_platform_data mx51_efikamx_leds_data = {
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.leds = mx51_efikamx_leds,
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.num_leds = ARRAY_SIZE(mx51_efikamx_leds),
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};
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static struct platform_device mx51_efikamx_leds_device = {
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.name = "leds-gpio",
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.id = -1,
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.dev = {
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.platform_data = &mx51_efikamx_leds_data,
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},
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};
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static struct gpio_keys_button mx51_efikamx_powerkey[] = {
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{
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.code = KEY_POWER,
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.gpio = EFIKAMX_POWER_KEY,
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.type = EV_PWR,
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.desc = "Power Button (CM)",
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.wakeup = 1,
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.debounce_interval = 10, /* ms */
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},
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};
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static const struct gpio_keys_platform_data mx51_efikamx_powerkey_data __initconst = {
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.buttons = mx51_efikamx_powerkey,
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.nbuttons = ARRAY_SIZE(mx51_efikamx_powerkey),
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};
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void mx51_efikamx_reset(void)
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{
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if (system_rev == 0x11)
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gpio_direction_output(EFIKAMX_RESET1_1, 0);
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else
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gpio_direction_output(EFIKAMX_RESET, 0);
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}
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static struct regulator *pwgt1, *pwgt2, *coincell;
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static void mx51_efikamx_power_off(void)
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{
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if (!IS_ERR(coincell))
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regulator_disable(coincell);
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if (!IS_ERR(pwgt1) && !IS_ERR(pwgt2)) {
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regulator_disable(pwgt2);
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regulator_disable(pwgt1);
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}
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gpio_direction_output(EFIKAMX_POWEROFF, 1);
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}
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static int __init mx51_efikamx_power_init(void)
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{
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if (machine_is_mx51_efikamx()) {
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pwgt1 = regulator_get(NULL, "pwgt1");
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pwgt2 = regulator_get(NULL, "pwgt2");
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if (!IS_ERR(pwgt1) && !IS_ERR(pwgt2)) {
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regulator_enable(pwgt1);
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regulator_enable(pwgt2);
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}
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gpio_request(EFIKAMX_POWEROFF, "poweroff");
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pm_power_off = mx51_efikamx_power_off;
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/* enable coincell charger. maybe need a small power driver ? */
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coincell = regulator_get(NULL, "coincell");
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if (!IS_ERR(coincell)) {
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regulator_set_voltage(coincell, 3000000, 3000000);
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regulator_enable(coincell);
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}
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regulator_has_full_constraints();
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}
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return 0;
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}
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late_initcall(mx51_efikamx_power_init);
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static void __init mx51_efikamx_init(void)
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{
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mxc_iomux_v3_setup_multiple_pads(mx51efikamx_pads,
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ARRAY_SIZE(mx51efikamx_pads));
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efika_board_common_init();
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mx51_efikamx_board_id();
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/* on < 1.2 boards both SD controllers are used */
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if (system_rev < 0x12) {
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imx51_add_sdhci_esdhc_imx(1, NULL);
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mx51_efikamx_leds[2].default_trigger = "mmc1";
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}
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platform_device_register(&mx51_efikamx_leds_device);
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imx51_add_gpio_keys(&mx51_efikamx_powerkey_data);
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if (system_rev == 0x11) {
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gpio_request(EFIKAMX_RESET1_1, "reset");
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gpio_direction_output(EFIKAMX_RESET1_1, 1);
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} else {
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gpio_request(EFIKAMX_RESET, "reset");
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gpio_direction_output(EFIKAMX_RESET, 1);
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}
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/*
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* enable wifi by default only on mx
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* sb and mx have same wlan pin but the value to enable it are
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* different :/
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*/
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gpio_request(EFIKA_WLAN_EN, "wlan_en");
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gpio_direction_output(EFIKA_WLAN_EN, 0);
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msleep(10);
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gpio_request(EFIKA_WLAN_RESET, "wlan_rst");
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gpio_direction_output(EFIKA_WLAN_RESET, 0);
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msleep(10);
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gpio_set_value(EFIKA_WLAN_RESET, 1);
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}
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static void __init mx51_efikamx_timer_init(void)
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{
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mx51_clocks_init(32768, 24000000, 22579200, 24576000);
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}
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static struct sys_timer mx51_efikamx_timer = {
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.init = mx51_efikamx_timer_init,
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};
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MACHINE_START(MX51_EFIKAMX, "Genesi EfikaMX nettop")
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/* Maintainer: Amit Kucheria <amit.kucheria@linaro.org> */
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.boot_params = MX51_PHYS_OFFSET + 0x100,
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.map_io = mx51_map_io,
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.init_early = imx51_init_early,
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.init_irq = mx51_init_irq,
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.timer = &mx51_efikamx_timer,
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.init_machine = mx51_efikamx_init,
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MACHINE_END
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