Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit 7ef31e9c authored by David Brownell's avatar David Brownell Committed by Haavard Skinnemoen
Browse files

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: default avatarDavid Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: default avatarHaavard Skinnemoen <haavard.skinnemoen@atmel.com>
parent d86d314f

arch/avr32/boards/atngw100/setup.c

+22 −0
Original line number Diff line number Diff line
@@ -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);