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Commit 2097abcb authored by Alberto Panizzo's avatar Alberto Panizzo Committed by Sascha Hauer
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Armadillo500 Add support for Seiko Instruments S-35390A rtc over i2c. 



The RTC chip Seiko Instruments S-35390A is connected to the Application
Processor over the second bus i2c with the hard coded address 0x30.

Signed-off-by: default avatarAlberto Panizzo <maramaopercheseimorto@gmail.com>
Signed-off-by: default avatarSascha Hauer <s.hauer@pengutronix.de>
parent e9a6c5d0

arch/arm/mach-mx3/armadillo5x0.c

+20 −0
Original line number Original line Diff line number Diff line
@@ -35,6 +35,7 @@ 
#include <linux/io.h>

#include <linux/io.h>

#include <linux/input.h>

#include <linux/input.h>

#include <linux/gpio_keys.h>

#include <linux/gpio_keys.h>

#include <linux/i2c.h>





#include <mach/hardware.h>

#include <mach/hardware.h>

#include <asm/mach-types.h>

#include <asm/mach-types.h>
@@ -104,6 +105,13 @@ static int armadillo5x0_pins[] = { 
	MX31_PIN_CSPI2_MISO__SDA,

	MX31_PIN_CSPI2_MISO__SDA,

};

};





/* RTC over I2C*/

#define ARMADILLO5X0_RTC_GPIO	IOMUX_TO_GPIO(MX31_PIN_SRXD4)



static struct i2c_board_info armadillo5x0_i2c_rtc = {

	I2C_BOARD_INFO("s35390a", 0x30),

};



/* GPIO BUTTONS */

/* GPIO BUTTONS */

static struct gpio_keys_button armadillo5x0_buttons[] = {

static struct gpio_keys_button armadillo5x0_buttons[] = {

	{

	{
@@ -373,6 +381,18 @@ static void __init armadillo5x0_init(void) 




	/* set NAND page size to 2k if not configured via boot mode pins */

	/* set NAND page size to 2k if not configured via boot mode pins */

	__raw_writel(__raw_readl(MXC_CCM_RCSR) | (1 << 30), MXC_CCM_RCSR);

	__raw_writel(__raw_readl(MXC_CCM_RCSR) | (1 << 30), MXC_CCM_RCSR);



	/* RTC */

	/* Get RTC IRQ and register the chip */

	if (gpio_request(ARMADILLO5X0_RTC_GPIO, "rtc") == 0) {

		if (gpio_direction_input(ARMADILLO5X0_RTC_GPIO) == 0)

			armadillo5x0_i2c_rtc.irq = gpio_to_irq(ARMADILLO5X0_RTC_GPIO);

		else

			gpio_free(ARMADILLO5X0_RTC_GPIO);

	}

	if (armadillo5x0_i2c_rtc.irq == 0)

		pr_warning("armadillo5x0_init: failed to get RTC IRQ\n");

	i2c_register_board_info(1, &armadillo5x0_i2c_rtc, 1);

}

}





static void __init armadillo5x0_timer_init(void)

static void __init armadillo5x0_timer_init(void)