linux-kernel - Re: [v2,7/8] clk: divider: read-only divider can propagate rate change

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Date:   Mon, 19 Feb 2018 11:30:38 -0600
From:   David Lechner <david@...hnology.com>
To:     Jerome Brunet <jbrunet@...libre.com>,
        Michael Turquette <mturquette@...libre.com>,
        Stephen Boyd <sboyd@...nel.org>
Cc:     linux-clk@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [v2,7/8] clk: divider: read-only divider can propagate rate
 change

On 02/14/2018 07:43 AM, Jerome Brunet wrote:
> When a divider clock has CLK_DIVIDER_READ_ONLY set, it means that the
> register shall be left un-touched, but it does not mean the clock
> should stop rate propagation if CLK_SET_RATE_PARENT is set
> 
> This is properly handled in qcom clk-regmap-divider but it was not in
> the generic divider
> 
> To fix this situation, introduce a new helper function
> divider_ro_round_rate, on the same model as divider_round_rate.
> 
> Fixes: e6d5e7d90be9 ("clk-divider: Fix READ_ONLY when divider > 1")
> Signed-off-by: Jerome Brunet <jbrunet@...libre.com>
> ---

Working for me with the davinci clk drivers I am developing.

Tested-By: David Lechner <david@...hnology.com>