From: "Niklas Söderlund" <niklas.soderlund@ragnatech.se>
To: Geert Uytterhoeven <geert+renesas@glider.be>
Cc: Michael Turquette <mturquette@baylibre.com>,
Stephen Boyd <sboyd@kernel.org>,
linux-clk@vger.kernel.org, linux-renesas-soc@vger.kernel.org
Subject: Re: [PATCH v2 4/8] clk: renesas: rcar-gen3: Absorb cpg_sd_clock_calc_div()
Date: Sat, 31 Aug 2019 00:14:41 +0200 [thread overview]
Message-ID: <20190830221441.GT8479@bigcity.dyn.berto.se> (raw)
In-Reply-To: <20190830134515.11925-5-geert+renesas@glider.be>
Hi Geert,
Thanks for your work.
On 2019-08-30 15:45:11 +0200, Geert Uytterhoeven wrote:
> cpg_sd_clock_round_rate() is the sole caller of cpg_sd_clock_calc_div(),
> hence absorb the latter into the former.
>
> Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se>
> ---
> v2:
> - Split off from "clk: renesas: rcar-gen3: Switch SD clocks to
> .determine_rate()".
> ---
> drivers/clk/renesas/rcar-gen3-cpg.c | 19 +++++--------------
> 1 file changed, 5 insertions(+), 14 deletions(-)
>
> diff --git a/drivers/clk/renesas/rcar-gen3-cpg.c b/drivers/clk/renesas/rcar-gen3-cpg.c
> index 9f457411984b1ca4..12ea5c9a671de788 100644
> --- a/drivers/clk/renesas/rcar-gen3-cpg.c
> +++ b/drivers/clk/renesas/rcar-gen3-cpg.c
> @@ -309,15 +309,15 @@ static unsigned long cpg_sd_clock_recalc_rate(struct clk_hw *hw,
> clock->div_table[clock->cur_div_idx].div);
> }
>
> -static unsigned int cpg_sd_clock_calc_div(struct sd_clock *clock,
> - unsigned long rate,
> - unsigned long parent_rate)
> +static long cpg_sd_clock_round_rate(struct clk_hw *hw, unsigned long rate,
> + unsigned long *parent_rate)
> {
> unsigned long calc_rate, diff, diff_min = ULONG_MAX;
> + struct sd_clock *clock = to_sd_clock(hw);
> unsigned int i, best_div = 0;
>
> for (i = 0; i < clock->div_num; i++) {
> - calc_rate = DIV_ROUND_CLOSEST(parent_rate,
> + calc_rate = DIV_ROUND_CLOSEST(*parent_rate,
> clock->div_table[i].div);
> diff = calc_rate > rate ? calc_rate - rate : rate - calc_rate;
> if (diff < diff_min) {
> @@ -326,16 +326,7 @@ static unsigned int cpg_sd_clock_calc_div(struct sd_clock *clock,
> }
> }
>
> - return best_div;
> -}
> -
> -static long cpg_sd_clock_round_rate(struct clk_hw *hw, unsigned long rate,
> - unsigned long *parent_rate)
> -{
> - struct sd_clock *clock = to_sd_clock(hw);
> - unsigned int div = cpg_sd_clock_calc_div(clock, rate, *parent_rate);
> -
> - return DIV_ROUND_CLOSEST(*parent_rate, div);
> + return DIV_ROUND_CLOSEST(*parent_rate, best_div);
> }
>
> static int cpg_sd_clock_set_rate(struct clk_hw *hw, unsigned long rate,
> --
> 2.17.1
>
--
Regards,
Niklas Söderlund
next prev parent reply other threads:[~2019-08-30 22:14 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-08-30 13:45 [PATCH v2 0/8] clk: renesas: rcar-gen2/gen3: Switch to .determine_rate() Geert Uytterhoeven
2019-08-30 13:45 ` [PATCH v2 1/8] clk: renesas: rcar-gen2: Improve arithmetic divisions Geert Uytterhoeven
2019-08-30 21:42 ` Niklas Söderlund
2019-08-30 13:45 ` [PATCH v2 2/8] clk: renesas: rcar-gen3: " Geert Uytterhoeven
2019-08-30 21:57 ` Niklas Söderlund
2019-08-30 13:45 ` [PATCH v2 3/8] clk: renesas: rcar-gen3: Avoid double table iteration in SD .set_rate() Geert Uytterhoeven
2019-08-30 22:06 ` Niklas Söderlund
2019-08-30 13:45 ` [PATCH v2 4/8] clk: renesas: rcar-gen3: Absorb cpg_sd_clock_calc_div() Geert Uytterhoeven
2019-08-30 22:14 ` Niklas Söderlund [this message]
2019-08-30 13:45 ` [PATCH v2 5/8] clk: renesas: rcar-gen3: Loop to find best rate in cpg_sd_clock_round_rate() Geert Uytterhoeven
2019-08-30 22:23 ` Niklas Söderlund
2019-08-30 13:45 ` [PATCH v2 6/8] clk: renesas: rcar-gen2: Switch Z clock to .determine_rate() Geert Uytterhoeven
2019-08-30 13:45 ` [PATCH v2 7/8] clk: renesas: rcar-gen3: Switch Z clocks " Geert Uytterhoeven
2019-08-30 13:45 ` [PATCH v2 8/8] clk: renesas: rcar-gen3: Switch SD " Geert Uytterhoeven
2019-09-03 22:09 ` [PATCH v2 0/8] clk: renesas: rcar-gen2/gen3: Switch " Stephen Boyd
2019-09-04 6:51 ` Geert Uytterhoeven
2019-09-11 16:24 ` Stephen Boyd
2019-10-21 8:35 ` Geert Uytterhoeven
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