Commit 6b61a83b authored by vikram pandita's avatar vikram pandita Committed by Tony Lindgren
Browse files

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: default avatarVikram Pandita <vikram.pandita@ti.com>
Signed-off-by: default avatarTony Lindgren <tony@atomide.com>
parent 62d0b336

arch/arm/mach-omap2/board-zoom-peripherals.c

100644 → 100755
+2 −2
Original line number Diff line number Diff line
@@ -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);

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