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Armadillo500 Add support for Seiko Instruments S-35390A rtc over i2c.

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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: Alberto Panizzo <maramaopercheseimorto@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
This commit is contained in:
Alberto Panizzo 2009-10-15 19:33:24 +02:00 committed by Sascha Hauer
parent e9a6c5d0c8
commit 2097abcb8c
1 changed files with 20 additions and 0 deletions
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20
arch/arm/mach-mx3/armadillo5x0.c
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@ -35,6 +35,7 @@
#include <linux/io.h>
#include <linux/input.h>
#include <linux/gpio_keys.h>
#include <linux/i2c.h>
#include <mach/hardware.h>
#include <asm/mach-types.h>
@ -104,6 +105,13 @@ static int armadillo5x0_pins[] = {
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 */
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 */
__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)