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Diffstat (limited to 'arch/avr32/boards/atngw100/setup.c')
-rw-r--r--arch/avr32/boards/atngw100/setup.c29
1 files changed, 29 insertions, 0 deletions
diff --git a/arch/avr32/boards/atngw100/setup.c b/arch/avr32/boards/atngw100/setup.c
index a398be284966..a51bb9fb3c89 100644
--- a/arch/avr32/boards/atngw100/setup.c
+++ b/arch/avr32/boards/atngw100/setup.c
@@ -9,6 +9,8 @@
*/
#include <linux/clk.h>
#include <linux/etherdevice.h>
+#include <linux/irq.h>
+#include <linux/i2c.h>
#include <linux/i2c-gpio.h>
#include <linux/init.h>
#include <linux/linkage.h>
@@ -25,6 +27,13 @@
#include <asm/arch/init.h>
#include <asm/arch/portmux.h>
+/* Oscillator frequencies. These are board-specific */
+unsigned long at32_board_osc_rates[3] = {
+ [0] = 32768, /* 32.768 kHz on RTC osc */
+ [1] = 20000000, /* 20 MHz on osc0 */
+ [2] = 12000000, /* 12 MHz on osc1 */
+};
+
/* Initialized by bootloader-specific startup code. */
struct tag *bootloader_tags __initdata;
@@ -140,6 +149,10 @@ static struct platform_device i2c_gpio_device = {
},
};
+static struct i2c_board_info __initdata i2c_info[] = {
+ /* NOTE: original ATtiny24 firmware is at address 0x0b */
+};
+
static int __init atngw100_init(void)
{
unsigned i;
@@ -165,12 +178,28 @@ static int __init atngw100_init(void)
}
platform_device_register(&ngw_gpio_leds);
+ /* all these i2c/smbus pins should have external pullups for
+ * open-drain sharing among all I2C devices. SDA and SCL do;
+ * PB28/EXTINT3 doesn't; it should be SMBALERT# (for PMBus),
+ * but it's not available off-board.
+ */
+ at32_select_periph(GPIO_PIN_PB(28), 0, AT32_GPIOF_PULLUP);
at32_select_gpio(i2c_gpio_data.sda_pin,
AT32_GPIOF_MULTIDRV | AT32_GPIOF_OUTPUT | AT32_GPIOF_HIGH);
at32_select_gpio(i2c_gpio_data.scl_pin,
AT32_GPIOF_MULTIDRV | AT32_GPIOF_OUTPUT | AT32_GPIOF_HIGH);
platform_device_register(&i2c_gpio_device);
+ i2c_register_board_info(0, i2c_info, ARRAY_SIZE(i2c_info));
return 0;
}
postcore_initcall(atngw100_init);
+
+static int __init atngw100_arch_init(void)
+{
+ /* set_irq_type() after the arch_initcall for EIC has run, and
+ * before the I2C subsystem could try using this IRQ.
+ */
+ return set_irq_type(AT32_EXTINT(3), IRQ_TYPE_EDGE_FALLING);
+}
+arch_initcall(atngw100_arch_init);