From mboxrd@z Thu Jan 1 00:00:00 1970 From: tony@atomide.com (Tony Lindgren) Date: Tue, 13 Oct 2009 17:14:30 -0700 Subject: [PATCH 4/6] omap: RX-51: Drop I2C-1 speed to 2200 In-Reply-To: <20091014001233.6116.84749.stgit@localhost> References: <20091014001233.6116.84749.stgit@localhost> Message-ID: <20091014001430.6116.52257.stgit@localhost> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org From: Aaro Koskinen The I2C-1 bus frequency on RX-51 should be 2.2 MHz. The speed is limited by TWL5030/GAIA; a higher speed could lead to errors on the interface. The maximum speed depends on the system clock for GAIA: 2.2 MHz (if 19.2 MHz), 2.4 MHz (26 MHz) or 2.9 MHz (38.4 MHz). Signed-off-by: Aaro Koskinen Signed-off-by: Tony Lindgren --- arch/arm/mach-omap2/board-rx51-peripherals.c | 2 +- 1 files changed, 1 insertions(+), 1 deletions(-) diff --git a/arch/arm/mach-omap2/board-rx51-peripherals.c b/arch/arm/mach-omap2/board-rx51-peripherals.c index c1af532..2b0eb1b 100644 --- a/arch/arm/mach-omap2/board-rx51-peripherals.c +++ b/arch/arm/mach-omap2/board-rx51-peripherals.c @@ -444,7 +444,7 @@ static int __init rx51_i2c_init(void) rx51_twldata.vaux3 = &rx51_vaux3_cam; rx51_twldata.vmmc2 = &rx51_vmmc2; } - omap_register_i2c_bus(1, 2600, rx51_peripherals_i2c_board_info_1, + omap_register_i2c_bus(1, 2200, rx51_peripherals_i2c_board_info_1, ARRAY_SIZE(rx51_peripherals_i2c_board_info_1)); omap_register_i2c_bus(2, 100, NULL, 0); omap_register_i2c_bus(3, 400, NULL, 0);