linux-kernel - Re: [PATCH 2/6] net: ethernet: ti: cpts: add support for ext rftclk selection

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Message-ID: <1f0c1579-7b9a-49a4-c3b4-79c40051b9fd@ti.com>
Date:   Tue, 6 Dec 2016 14:40:48 -0600
From:   Grygorii Strashko <grygorii.strashko@...com>
To:     Richard Cochran <richardcochran@...il.com>
CC:     Murali Karicheri <m-karicheri2@...com>,
        "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>, Wingman Kwok <w-kwok2@...com>,
        <linux-clk@...r.kernel.org>
Subject: Re: [PATCH 2/6] net: ethernet: ti: cpts: add support for ext rftclk
 selection



On 12/06/2016 02:25 PM, Richard Cochran wrote:
> On Tue, Dec 06, 2016 at 01:39:40PM -0600, Grygorii Strashko wrote:
>> I come with below RFC patch. if no objection I'll move forward with it.
> 
> Thanks for following through with this!
> 
> The am335x will also need the MUX in its clock tree, won't it?
> 

Not exactly. I do not see CPTS_RFTCLK_SEL register in trm, but looks like
it's already implemented in am335 clock tree:
	cpsw_cpts_rft_clk: cpsw_cpts_rft_clk@520 {
		#clock-cells = <0>;
		compatible = "ti,mux-clock";
		clocks = <&dpll_core_m5_ck>, <&dpll_core_m4_ck>;
		reg = <0x0520>;
	};

and ssigned-clock-xx can be used to change parent in board file:

&cpsw_cpts_rft_clk {
assigned-clocks = <&cpsw_cpts_rft_clk>;
assigned-clock-parents = <&dpll_core_m4_ck>;
};


-- 
regards,
-grygorii