On a mx28evk with a sgtl5000 codec we notice a loud 'click' sound  to happen
5 seconds after the end of a playback.

The SMALL_POP bit should fix this, but its definition is incorrect:
according to the sgtl5000 manual it is bit 0 of CHIP_REF_CTRL register, not
bit 1.

Fix the definition accordingly and enable the bit as intended per the code
comment.

After applying this change, no loud 'click' sound is heard after playback
Signed-off-by: NFabio Estevam <fabio.estevam@freescale.com>
Signed-off-by: NMark Brown <broonie@kernel.org>
Cc: stable@vger.kernel.org

SGTL5000_PLL_FRAC_DIV_MASK is used to mask bits 0-10 (11 bits in total) of
register CHIP_PLL_CTRL, so fix the mask to accomodate all this bit range.
Reported-by: NOskar Schirmer <oskar@scara.com>
Signed-off-by: NFabio Estevam <fabio.estevam@freescale.com>
Signed-off-by: NMark Brown <broonie@linaro.org>
Cc: stable@vger.kernel.org

The list below the comment relates to sgtl5000 registers addresses, so change
the comment to improve the description.
Signed-off-by: NFabio Estevam <fabio.estevam@freescale.com>
Signed-off-by: NMark Brown <broonie@opensource.wolfsonmicro.com>

According to the datasheet:
CHIP_MIC_CTRL 0x002A

BITS[9:8] BIAS_RESISTOR
        0x0 = Powerd off
        0x1 = 2.0 kohm
        0x2 = 4.0 kohm
        0x3 = 8.0 kohm

Thus SGTL5000_BIAS_R_MASK should be defined as 0x0300 instead of 0x0200.
Signed-off-by: NAxel Lin <axel.lin@gmail.com>
Acked-by: NWolfram Sang <w.sang@pengutronix.de>
Acked-by: NLiam Girdwood <lrg@ti.com>
Signed-off-by: NMark Brown <broonie@opensource.wolfsonmicro.com>

Remove unnecessary headers:
 - mach/hardware.h in sgtl5000.c
 - linux/i2c.h in sgtl5000.h
Signed-off-by: NZeng Zhaoming <b32542@freescale.com>
Signed-off-by: NMark Brown <broonie@opensource.wolfsonmicro.com>

Add Freescale SGTL5000 codec support.
Supported features:
 - line-in and mic input
 - headphone and line-out output
 - line-in bypass ADC and DAC to headphone
 - 16, 20, 24, 32 bit audio
 - 8 ~ 96k sample rates
Signed-off-by: NZeng Zhaoming <zhaoming.zeng@freescale.com>
Acked-by: NLiam Girdwood <lrg@slimlogic.co.uk>
Signed-off-by: NMark Brown <broonie@opensource.wolfsonmicro.com>