linux-kernel - Re: [alsa-devel] [RFC PATCH 16/40] soundwire: cadence_master: improve startup sequence with link hw

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Date:   Fri, 26 Jul 2019 09:11:03 -0500
From:   Pierre-Louis Bossart <pierre-louis.bossart@...ux.intel.com>
To:     Guennadi Liakhovetski <guennadi.liakhovetski@...ux.intel.com>
Cc:     alsa-devel@...a-project.org, tiwai@...e.de,
        gregkh@...uxfoundation.org, linux-kernel@...r.kernel.org,
        vkoul@...nel.org, broonie@...nel.org,
        srinivas.kandagatla@...aro.org, jank@...ence.com,
        slawomir.blauciak@...el.com, Sanyog Kale <sanyog.r.kale@...el.com>
Subject: Re: [alsa-devel] [RFC PATCH 16/40] soundwire: cadence_master: improve
 startup sequence with link hw_reset


>> +static int do_reset(struct sdw_cdns *cdns)
>> +{
>> +	int ret;
>> +
>> +	/* program maximum length reset to be safe */
>> +	cdns_updatel(cdns, CDNS_MCP_CONTROL,
>> +		     CDNS_MCP_CONTROL_RST_DELAY,
>> +		     CDNS_MCP_CONTROL_RST_DELAY);
>> +
>> +	/* use hardware generated reset */
>> +	cdns_updatel(cdns, CDNS_MCP_CONTROL,
>> +		     CDNS_MCP_CONTROL_HW_RST,
>> +		     CDNS_MCP_CONTROL_HW_RST);
>> +
>> +	/* enable bus operations with clock and data */
>> +	cdns_updatel(cdns, CDNS_MCP_CONFIG,
>> +		     CDNS_MCP_CONFIG_OP,
>> +		     CDNS_MCP_CONFIG_OP_NORMAL);
>> +
>> +	/* commit changes */
>> +	ret = cdns_update_config(cdns);
>> +
>> +	return ret;
> 
> +	return cdns_update_config(cdns);
> 
> and remove the "ret" variable.

Yes, it's the same issue as previously reported. will fix.