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authorAlberto Panizzo <maramaopercheseimorto@gmail.com>2009-10-15 19:33:24 +0200
committerSascha Hauer <s.hauer@pengutronix.de>2009-11-14 10:29:13 +0100
commit2097abcb8c5a1ccd8c126f6680df28ff6b6b96d0 (patch)
tree40beecbd55c84468aa42ae8bebd0b7851b8abb97
parente9a6c5d0c8c3f7f4d4ed5c5b1514327d58b76df3 (diff)
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: Alberto Panizzo <maramaopercheseimorto@gmail.com> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
-rw-r--r--arch/arm/mach-mx3/armadillo5x0.c20
1 files changed, 20 insertions, 0 deletions
diff --git a/arch/arm/mach-mx3/armadillo5x0.c b/arch/arm/mach-mx3/armadillo5x0.c
index fa973e40329..54aab401dbd 100644
--- a/arch/arm/mach-mx3/armadillo5x0.c
+++ b/arch/arm/mach-mx3/armadillo5x0.c
@@ -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)