linux-kernel - Re: [PATCH v1 1/4] clk: iproc: Allow iproc pll to runtime calculate vco parameters

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Message-ID: <20171228225711.GT7997@codeaurora.org>
Date:   Thu, 28 Dec 2017 14:57:11 -0800
From:   Stephen Boyd <sboyd@...eaurora.org>
To:     Lori Hikichi <lori.hikichi@...adcom.com>
Cc:     Michael Turquette <mturquette@...libre.com>,
        Ray Jui <rjui@...adcom.com>,
        Scott Branden <sbranden@...adcom.com>,
        Jon Mason <jonmason@...adcom.com>,
        bcm-kernel-feedback-list@...adcom.com, linux-clk@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        Simran Rai <ssimran@...adcom.com>
Subject: Re: [PATCH v1 1/4] clk: iproc: Allow iproc pll to runtime calculate
 vco parameters

On 08/14, Lori Hikichi wrote:
> Add the ability for the iproc pll to calculate the pll parameters at
> runtime instead of only using predefined tables. This ability allows
> the clock users to select from the full range of vco frequencies.
> The old method of table based programming is retained so that existing
> users will retain expected behavior. The flag IPROC_CLK_PLL_CALC_PARAM
> will need to be set to enable the new runtime calculation method.
> Currently, this is only being enabled for the audio pll.
> 
> This feature also revealed a problem with the driver using the
> round_rate api.  The round_rate api does not allow for frequencies larger
> than 2^31 to be returned.  Those large frequencies are interpreted as an
> error code. Therefore, we are moving to the determine_rate api which
> solves this problem.
> 
> Signed-off-by: Simran Rai <ssimran@...adcom.com>
> Signed-off-by: Lori Hikichi <lori.hikichi@...adcom.com>
> ---

Applied to clk-next

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