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omap3: zoom: Drop i2c-1 speed to 2400 

The I2C-1 bus frequency on zoom2/zoom3/sdp3630 should be 2.4 MHz.
The speed is limited by TWL5030/GAIA; a higher speed could lead to errors
on the interface.

The maximum I2C speed depends on the system clock for GAIA:
2.2 MHz (sys-clk = 19.2 MHz)
2.4 MHz (sys-clk = 26 MHz)
2.9 MHz (sys-clk = 38.4 MHz)

For Zoom2/Zoom3/SDP3630 the system clock is 26Mhz
and hence choose 2.4Mhz for I2C1 bus speed

Signed-off-by: Vikram Pandita <vikram.pandita@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
This commit is contained in:
vikram pandita 2009-11-22 10:11:31 -08:00 committed by Tony Lindgren
parent 62d0b336d4
commit 6b61a83b31
1 changed files with 2 additions and 2 deletions
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4
arch/arm/mach-omap2/board-zoom-peripherals.c Normal file → Executable file
View File

@ -243,7 +243,7 @@ static struct twl4030_platform_data zoom_twldata = {
static struct i2c_board_info __initdata zoom_i2c_boardinfo[] = {
{
I2C_BOARD_INFO("twl4030", 0x48),
I2C_BOARD_INFO("twl5030", 0x48),
.flags = I2C_CLIENT_WAKE,
.irq = INT_34XX_SYS_NIRQ,
.platform_data = &zoom_twldata,
@ -252,7 +252,7 @@ static struct i2c_board_info __initdata zoom_i2c_boardinfo[] = {
static int __init omap_i2c_init(void)
{
omap_register_i2c_bus(1, 2600, zoom_i2c_boardinfo,
omap_register_i2c_bus(1, 2400, zoom_i2c_boardinfo,
ARRAY_SIZE(zoom_i2c_boardinfo));
omap_register_i2c_bus(2, 400, NULL, 0);
omap_register_i2c_bus(3, 400, NULL, 0);