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| author | David Brownell <dbrownell@users.sourceforge.net> | 2008-06-12 12:18:05 -0700 |
|---|---|---|
| committer | Haavard Skinnemoen <haavard.skinnemoen@atmel.com> | 2008-06-27 15:32:29 +0200 |
| commit | 7ef31e9c4e711bfb817a15b54e428e5c4a7c0032 (patch) | |
| tree | 672d3c41f57cda9f731c759a71b179fe9f80c61f /arch | |
| parent | d86d314f67191011e6f494f6517b8cbd7dd3dc39 (diff) | |
| download | linux-7ef31e9c4e711bfb817a15b54e428e5c4a7c0032.tar.gz linux-7ef31e9c4e711bfb817a15b54e428e5c4a7c0032.tar.bz2 linux-7ef31e9c4e711bfb817a15b54e428e5c4a7c0032.zip | |
avr32: improve NGW100 I2C/PMBus setup
Basic I2C initialization for the NGW100 board:
- Provide empty i2c device table. Daughtercards may add devices,
and the ATtiny24 could do stuff too.
- Set up EXTINT(3) so the ATtiny24 can interrupt the AP7000.
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Haavard Skinnemoen <haavard.skinnemoen@atmel.com>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/avr32/boards/atngw100/setup.c | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/arch/avr32/boards/atngw100/setup.c b/arch/avr32/boards/atngw100/setup.c index 00ce961c52a5..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> @@ -147,6 +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; @@ -172,12 +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); |