On Wed, Sep 11, 2019 at 06:25:29PM +0800, shifu0...@thundersoft.com wrote:

> +++ b/sound/soc/codecs/tas2770.c
> @@ -0,0 +1,954 @@
> +/*
> + * SPDX-License-Identifier: GPL-2.0
> + *
> + * ALSA SoC Texas Instruments TAS2770 20-W Digital Input Mono Class-D
> + * Audio Amplifier with Speaker I/V Sense
> + *
> + * Copyright (C) 2016-2017 Texas Instruments Incorporated - 
> http://www.ti.com/
> + *   Author: Tracy Yi <tracy...@ti.com>
> + *   Shi Fu <shifu0...@thundersoft.com>
> + */

This is a C style comment not a C++ style comment.

> +static int tas2770_regmap_read(struct tas2770_priv *tas2770,
> +                     unsigned int reg, unsigned int *value)
> +{
> +     int result = 0;
> +     int retry_count = TAS2770_I2C_RETRY_COUNT;
> +
> +     while (retry_count--) {
> +             result = snd_soc_component_read(tas2770->component, reg,
> +                     value);
> +             if (!result)
> +                     break;
> +
> +             msleep(20);
> +     }
> +     if (!retry_count)
> +             return -ETIMEDOUT;

This appears to be the same as the previous version?  It looks
like we still have code to hande the device randomly resetting
underneath the driver - like I said we really need to understand
why that's being done, I'd strongly suggest splitting that code
out into a separate patch so we can review the base driver and
hopefully merge it while we discuss this reboot support.

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