From 94e734655fbe294c50d304547cae033e87ec229e Mon Sep 17 00:00:00 2001 From: Ludovic Desroches Date: Wed, 12 Sep 2012 08:42:13 +0200 Subject: [PATCH] ARM: at91: do not configure at91sam9g10 twi pio as open-drain As indicated in the datasheet, TWD and TWCK must not be programmed as open-drain. Signed-off-by: Ludovic Desroches Acked-by: Nikolaus Voss Acked-by: Nicolas Ferre Signed-off-by: Wolfram Sang --- arch/arm/mach-at91/at91sam9261_devices.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/arch/arm/mach-at91/at91sam9261_devices.c b/arch/arm/mach-at91/at91sam9261_devices.c index 29188ef7422b..50d317940f5a 100644 --- a/arch/arm/mach-at91/at91sam9261_devices.c +++ b/arch/arm/mach-at91/at91sam9261_devices.c @@ -327,16 +327,16 @@ void __init at91_add_device_i2c(struct i2c_board_info *devices, int nr_devices) /* IP version is not the same on 9261 and g10 */ if (cpu_is_at91sam9g10()) { at91sam9261_twi_device.name = "i2c-at91sam9g10"; + /* I2C PIO must not be configured as open-drain on this chip */ } else { at91sam9261_twi_device.name = "i2c-at91sam9261"; + at91_set_multi_drive(AT91_PIN_PA7, 1); + at91_set_multi_drive(AT91_PIN_PA8, 1); } /* pins used for TWI interface */ at91_set_A_periph(AT91_PIN_PA7, 0); /* TWD */ - at91_set_multi_drive(AT91_PIN_PA7, 1); - at91_set_A_periph(AT91_PIN_PA8, 0); /* TWCK */ - at91_set_multi_drive(AT91_PIN_PA8, 1); i2c_register_board_info(0, devices, nr_devices); platform_device_register(&at91sam9261_twi_device); -- 2.30.2