linux-kernel - Re: [PATCH v2 08/13] net: ethernet: ti: cpts: move dt props parsing to cpts driver

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Message-ID: <b4503f15-6927-9b09-7cb0-ce1c8a8c4f59@ti.com>
Date:   Tue, 29 Nov 2016 09:54:26 -0600
From:   Grygorii Strashko <grygorii.strashko@...com>
To:     Richard Cochran <richardcochran@...il.com>
CC:     "David S. Miller" <davem@...emloft.net>, <netdev@...r.kernel.org>,
        Mugunthan V N <mugunthanvnm@...com>,
        Sekhar Nori <nsekhar@...com>, <linux-kernel@...r.kernel.org>,
        <linux-omap@...r.kernel.org>, Rob Herring <robh+dt@...nel.org>,
        <devicetree@...r.kernel.org>,
        Murali Karicheri <m-karicheri2@...com>,
        Wingman Kwok <w-kwok2@...com>
Subject: Re: [PATCH v2 08/13] net: ethernet: ti: cpts: move dt props parsing
 to cpts driver



On 11/29/2016 04:11 AM, Richard Cochran wrote:
> On Mon, Nov 28, 2016 at 05:03:32PM -0600, Grygorii Strashko wrote:
>> +static int cpts_of_parse(struct cpts *cpts, struct device_node *node)
>> +{
>> +	int ret = -EINVAL;
>> +	u32 prop;
>> +
>> +	if (of_property_read_u32(node, "cpts_clock_mult", &prop))
>> +		goto  of_error;
>> +	cpts->cc_mult = prop;
> 
> Why not set cc.mult here at the same time?

The same reason as in prev patch - cpts->cc_mult is original/initial mult
value loaded from DT (or calculated), while cc.mult is dynamic value
which can be changed as part of freq adjustment.

> 
>> +
>> +	if (of_property_read_u32(node, "cpts_clock_shift", &prop))
>> +		goto  of_error;
>> +	cpts->cc.shift = prop;
>> +
>> +	return 0;
>> +
>> +of_error:
>> +	dev_err(cpts->dev, "CPTS: Missing property in the DT.\n");
>> +	return ret;
>> +}
> 


-- 
regards,
-grygorii