topic Re: mx53 and mc34708 wakeup in i.MX Processors

mx53 and mc34708 wakeup

alexeym — Thu, 23 May 2013 04:00:35 GMT

Hello all,

I've got custom mx53 board based on mx53 loco with mc34708 power and last 2.6.35 kernel from freescale git.

My MC34708 PMIC_INT connected to CSI0_DAT10 and muxed as gpio 5_28.

How to get power button to work?

AFAIK TZIC workaround needs to be used only for da9053 boards.

Some code below:

#if defined(CONFIG_KEYBOARD_GPIO) || defined(CONFIG_KEYBOARD_GPIO_MODULE)

#define GPIO_BUTTON(gpio_num, ev_code, act_low, descr, wake) \

{ \

.gpio = gpio_num, \

.type = EV_KEY, \

.code = ev_code, \

.active_low = act_low, \

.desc = "btn " descr, \

.wakeup = wake, \

}

static struct gpio_keys_button loco_buttons[] = {

GPIO_BUTTON(MX53_nONKEY, KEY_POWER, 1, "power", 0),

};

static struct gpio_keys_platform_data loco_button_data = {

.buttons = loco_buttons,

.nbuttons = ARRAY_SIZE(loco_buttons),

};

static struct platform_device loco_button_device = {

.name = "gpio-keys",

.id = -1,

.num_resources = 0,

.dev = {

.platform_data = &loco_button_data,

}

};

static void __init loco_add_device_buttons(void)

{

platform_device_register(&loco_button_device);

}

#else

static void __init loco_add_device_buttons(void) {}

#endif

static void mxc_register_powerkey(pwrkey_callback pk_cb)

{

pmic_event_callback_t power_key_event;

power_key_event.param = (void *)1;

power_key_event.func = (void *)pk_cb;

pmic_event_subscribe(EVENT_PWRONI, power_key_event);

}

static int mxc_pwrkey_getstatus(int id)

{

int sense;

pmic_read_reg(REG_INT_SENSE1, &sense, 0xffffffff);

if (sense & (1 << 3))

return 0;

return 1;

}

static struct power_key_platform_data pwrkey_data = {

.key_value = KEY_F4,

.register_pwrkey = mxc_register_powerkey,

.get_key_status = mxc_pwrkey_getstatus,

};

//-------- init

mc34708_int = MX53_PAD_CSI0_DAT10__GPIO5_28;

mx53_loco_mc34708_irq = (4*32 + 28);

mxc_iomux_v3_setup_pad(mc34708_int);

gpio_request(mx53_loco_mc34708_irq, "pmic-int");

gpio_direction_input(mx53_loco_mc34708_irq);

mx53_loco_init_mc34708(mx53_loco_mc34708_irq);

dvfs_core_data.reg_id = "SW1A";

tve_data.dac_reg = "VDAC";

bus_freq_data.gp_reg_id = "SW1A";

bus_freq_data.lp_reg_id = "SW2";

mxc_register_device(&mxc_powerkey_device, &pwrkey_data);

mxc_register_device(&pm_device, &loco_pm_data);

loco_add_device_buttons();

I can wakeup board thru USB, but cannot use button.

I even can't check gpio thru terminal:

echo 156 > sys/class/gpio/export

-bash: echo: write error: Device or resource busy

What's wrong with my configuration?

Re: mx53 and mc34708 wakeup

weidong_sun — Thu, 23 May 2013 06:44:50 GMT

hello,alexeym,

I did it based on mc34708+i.mx53, please add the following:

/*Maybe you have these 4 lines in your BSP*/

#define TZIC_WAKEUP0_OFFSET (0x0E00)

#define TZIC_WAKEUP1_OFFSET (0x0E04)

#define TZIC_WAKEUP2_OFFSET (0x0E08)

#define TZIC_WAKEUP3_OFFSET (0x0E0C)

/*Use GPIO1_8 to control wakeup and sleep*/

#define GPIO1_8_18_IRQ_BIT (0x1<<18)

....

/*Following code should be adjusted*/

static void pad_tzic_irq_wakeup(void)
{
void __iomem *tzic_base;
tzic_base = ioremap(MX53_TZIC_BASE_ADDR, SZ_4K);
if (NULL == tzic_base) {
pr_err("fail to map MX53_TZIC_BASE_ADDR\n");
return;
}
__raw_writel(0, tzic_base + TZIC_WAKEUP0_OFFSET);
__raw_writel(0, tzic_base + TZIC_WAKEUP2_OFFSET);
__raw_writel(0, tzic_base + TZIC_WAKEUP3_OFFSET);

__raw_writel(GPIO1_8_18_IRQ_BIT, tzic_base + TZIC_WAKEUP1_OFFSET);
iounmap(tzic_base);
pr_info("TZIC irq is wakeup-enabled\n");
}

static void pad_suspend_enter(void)
{
pad_tzic_irq_wakeup();
}

static void pad_suspend_exit(void)
{

/*add your suppend exit code*/
printk(KERN_INFO "GPIO1_8 irq is to wakeup system\n");
}

static struct mxc_pm_platform_data pad_pm_data = {
.suspend_enter = pad_suspend_enter,
.suspend_exit = pad_suspend_exit,
};

....

/*following is your above code */

.....

<Note: accroding to reference manul ,the interrupt number of GPIO_1 signal0~signal15 is 50, we can calculate wakeup bit in TZIC, see page 4622, 32x1+18 = 50, so we can find wakeup bit : No.18 bit in WAKEUP1 register. >

See attachment, for you as a reference. But you should notice that you can't clear wakeup source of USB. In my code ,I cleaned it.

Weidong

Re: mx53 and mc34708 wakeup

alexeym — Mon, 27 May 2013 00:31:22 GMT

Sorry, that was hardware problem, everything works fine. Thanks for your help anyway!