From: Ludovic Desroches <ludovic.desroches@xxxxxxxxx>
As indicated in the datasheet, TWD and TWCK must not be programmed as
open-drain.
Signed-off-by: Ludovic Desroches <ludovic.desroches@xxxxxxxxx>
Acked-by: Nikolaus Voss <n.voss@xxxxxxxxxxx>
Acked-by: Nicolas Ferre <nicolas.ferre@xxxxxxxxx>
---
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 29188ef..50d3179 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);
--
1.7.11.3
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