diff options
| author |   Alberto Panizzo <maramaopercheseimorto@gmail.com> | 2009-10-15 19:33:24 +0200 |
|---|---|---|
| committer |   Sascha Hauer <s.hauer@pengutronix.de> | 2009-11-14 10:29:13 +0100 |
| commit | 2097abcb8c5a1ccd8c126f6680df28ff6b6b96d0 (patch) | |
| tree | 40beecbd55c84468aa42ae8bebd0b7851b8abb97 /arch/arm/mach-mx3 | |
| parent | Armadillo500 Add i2c second bus support. (diff) | |
| download | linux-dev-2097abcb8c5a1ccd8c126f6680df28ff6b6b96d0.tar.xz linux-dev-2097abcb8c5a1ccd8c126f6680df28ff6b6b96d0.zip | |
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>
Diffstat (limited to 'arch/arm/mach-mx3')
| -rw-r--r-- | arch/arm/mach-mx3/armadillo5x0.c | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/arch/arm/mach-mx3/armadillo5x0.c b/arch/arm/mach-mx3/armadillo5x0.c index fa973e40329e..54aab401dbdf 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) |