Commit 11e38e11 authored by Peter Ujfalusi's avatar Peter Ujfalusi Committed by Lee Jones
Browse files

mfd: twl6040: Select i2c fast mode as default with regmap patch 



All boards using twl6040 configures the i2c bus to 400KHz. While twl6040's
defaults to normal mode (100KHz). So far twl6040 has no problem with i2c
communication in this configuration it is safer to select fast i2c mode.

Signed-off-by: default avatarPeter Ujfalusi <peter.ujfalusi@ti.com>
Signed-off-by: default avatarLee Jones <lee.jones@linaro.org>
parent 02d02728

drivers/mfd/twl6040.c

+7 −2
Original line number Diff line number Diff line
@@ -87,8 +87,13 @@ static struct reg_default twl6040_defaults[] = { 
};



static struct reg_default twl6040_patch[] = {

	/* Select I2C bus access to dual access registers */

	{ TWL6040_REG_ACCCTL, 0x09 },

	/*

	 * Select I2C bus access to dual access registers

	 * Interrupt register is cleared on read

	 * Select fast mode for i2c (400KHz)

	 */

	{ TWL6040_REG_ACCCTL,

		TWL6040_I2CSEL | TWL6040_INTCLRMODE | TWL6040_I2CMODE(1) },

};

include/linux/mfd/twl6040.h

+1 −0
Original line number Diff line number Diff line
@@ -157,6 +157,7 @@ 
#define TWL6040_I2CSEL			0x01

#define TWL6040_RESETSPLIT		0x04

#define TWL6040_INTCLRMODE		0x08

#define TWL6040_I2CMODE(x)		((x & 0x3) << 4)



/* STATUS (0x2E) fields */

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