ASoC: sgtl5000: Disable internal PLL early

To handle the soft reboot case, the internal PLL must be
disabled in SGTL5000_CHIP_CLK_CTRL before clearing bits
SGTL5000_VCOAMP_POWERUP and SGTL5000_PLL_POWERUP in
register SGTL5000_CHIP_ANA_POWER.

Signed-off-by: Eric Nelson <eric@nelint.com>
Signed-off-by: Clemens Gruber <clemens.gruber@pqgruber.com>
Tested-by: Fabio Estevam <fabio.estevam@nxp.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

2 files changed, 9 insertions, 1 deletions

diff --git a/sound/soc/codecs/sgtl5000.c b/sound/soc/codecs/sgtl5000.c
index 42f2eb62664e..0916bb46ccf2 100644
--- a/sound/soc/codecs/sgtl5000.c
+++ b/sound/soc/codecs/sgtl5000.c
@@ -38,7 +38,6 @@
 /* default value of sgtl5000 registers */
 static const struct reg_default sgtl5000_reg_defaults[] = {
         { SGTL5000_CHIP_DIG_POWER,              0x0000 },
-        { SGTL5000_CHIP_CLK_CTRL,               0x0008 },
         { SGTL5000_CHIP_I2S_CTRL,               0x0010 },
         { SGTL5000_CHIP_SSS_CTRL,               0x0010 },
         { SGTL5000_CHIP_ADCDAC_CTRL,            0x020c },
@@ -1279,6 +1278,14 @@ static int sgtl5000_i2c_probe(struct i2c_client *client,
         dev_info(&client->dev, "sgtl5000 revision 0x%x\n", rev);
         sgtl5000->revision = rev;
 
+        /* reconfigure the clocks in case we're using the PLL */
+        ret = regmap_write(sgtl5000->regmap,
+                           SGTL5000_CHIP_CLK_CTRL,
+                           SGTL5000_CHIP_CLK_CTRL_DEFAULT);
+        if (ret)
+                dev_err(&client->dev,
+                        "Error %d initializing CHIP_CLK_CTRL\n", ret);
+
         /* Follow section 2.2.1.1 of AN3663 */
         ana_pwr = SGTL5000_ANA_POWER_DEFAULT;
         if (sgtl5000->num_supplies <= VDDD) {
diff --git a/sound/soc/codecs/sgtl5000.h b/sound/soc/codecs/sgtl5000.h
index 1be82379c689..22f3442af982 100644
--- a/sound/soc/codecs/sgtl5000.h
+++ b/sound/soc/codecs/sgtl5000.h
@@ -92,6 +92,7 @@
 /*
  * SGTL5000_CHIP_CLK_CTRL
  */
+#define SGTL5000_CHIP_CLK_CTRL_DEFAULT          0x0008
 #define SGTL5000_RATE_MODE_MASK                 0x0030
 #define SGTL5000_RATE_MODE_SHIFT                4
 #define SGTL5000_RATE_MODE_WIDTH                2