linux-kernel - [PATCH v11 4/4] G45 TWI: remove open drain setting for twi function gpios

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Date:	Tue, 8 Nov 2011 12:11:03 +0100
From:	Nikolaus Voss <n.voss@...nmann.de>
To:	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
	linux-i2c@...r.kernel.org
Cc:	nicolas.ferre@...el.com, ben-linux@...ff.org, balbi@...com,
	h.feurstein@...il.com, rmallon@...il.com, adrian.yanes@...to.fi,
	ludovic.desroches@...el.com, carsten.behling@...z-fricke.com
Subject: [PATCH v11 4/4] G45 TWI: remove open drain setting for twi function
 gpios

The G45 datasheets explicitly states that setting the open drain property
on peripheral function gpios is not allowed. (How about other A91 chips?)

Signed-off-by: Nikolaus Voss <n.voss@...nmann.de>
---
 arch/arm/mach-at91/at91sam9g45_devices.c |    6 ------
 1 file changed, 6 deletions(-)

diff --git a/arch/arm/mach-at91/at91sam9g45_devices.c b/arch/arm/mach-at91/at91sam9g45_devices.c
index eec5eb6..2134663 100644
--- a/arch/arm/mach-at91/at91sam9g45_devices.c
+++ b/arch/arm/mach-at91/at91sam9g45_devices.c
@@ -686,18 +686,12 @@ void __init at91_add_device_i2c(short i2c_id, struct i2c_board_info *devices, in
 	/* pins used for TWI interface */
 	if (i2c_id == 0) {
 		at91_set_A_periph(AT91_PIN_PA20, 0);		/* TWD */
-		at91_set_multi_drive(AT91_PIN_PA20, 1);
-
 		at91_set_A_periph(AT91_PIN_PA21, 0);		/* TWCK */
-		at91_set_multi_drive(AT91_PIN_PA21, 1);
 
 		platform_device_register(&at91sam9g45_twi0_device);
 	} else {
 		at91_set_A_periph(AT91_PIN_PB10, 0);		/* TWD */
-		at91_set_multi_drive(AT91_PIN_PB10, 1);
-
 		at91_set_A_periph(AT91_PIN_PB11, 0);		/* TWCK */
-		at91_set_multi_drive(AT91_PIN_PB11, 1);
 
 		platform_device_register(&at91sam9g45_twi1_device);
 	}
-- 
1.7.9.5

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