From: Samuel Holland <samuel@sholland.org>
To: Chen-Yu Tsai <wens@csie.org>, Jernej Skrabec <jernej.skrabec@gmail.com>
Cc: Samuel Holland <samuel@sholland.org>,
Michael Turquette <mturquette@baylibre.com>,
Stephen Boyd <sboyd@kernel.org>,
linux-arm-kernel@lists.infradead.org, linux-clk@vger.kernel.org,
linux-kernel@vger.kernel.org, linux-sunxi@lists.linux.dev
Subject: [PATCH] clk: sunxi-ng: mp: Avoid computing the rate twice
Date: Tue, 9 Aug 2022 20:40:24 -0500 [thread overview]
Message-ID: <20220810014024.27568-1-samuel@sholland.org> (raw)
ccu_mp_find_best() already computes a best_rate at the same time as the
best m and p factors. Return it so the caller does not need to duplicate
the division.
Signed-off-by: Samuel Holland <samuel@sholland.org>
---
drivers/clk/sunxi-ng/ccu_mp.c | 11 ++++++-----
1 file changed, 6 insertions(+), 5 deletions(-)
diff --git a/drivers/clk/sunxi-ng/ccu_mp.c b/drivers/clk/sunxi-ng/ccu_mp.c
index 57cf2d615148..cc94a694cb67 100644
--- a/drivers/clk/sunxi-ng/ccu_mp.c
+++ b/drivers/clk/sunxi-ng/ccu_mp.c
@@ -10,9 +10,9 @@
#include "ccu_gate.h"
#include "ccu_mp.h"
-static void ccu_mp_find_best(unsigned long parent, unsigned long rate,
- unsigned int max_m, unsigned int max_p,
- unsigned int *m, unsigned int *p)
+static unsigned long ccu_mp_find_best(unsigned long parent, unsigned long rate,
+ unsigned int max_m, unsigned int max_p,
+ unsigned int *m, unsigned int *p)
{
unsigned long best_rate = 0;
unsigned int best_m = 0, best_p = 0;
@@ -35,6 +35,8 @@ static void ccu_mp_find_best(unsigned long parent, unsigned long rate,
*m = best_m;
*p = best_p;
+
+ return best_rate;
}
static unsigned long ccu_mp_find_best_with_parent_adj(struct clk_hw *hw,
@@ -109,8 +111,7 @@ static unsigned long ccu_mp_round_rate(struct ccu_mux_internal *mux,
max_p = cmp->p.max ?: 1 << ((1 << cmp->p.width) - 1);
if (!clk_hw_can_set_rate_parent(&cmp->common.hw)) {
- ccu_mp_find_best(*parent_rate, rate, max_m, max_p, &m, &p);
- rate = *parent_rate / p / m;
+ rate = ccu_mp_find_best(*parent_rate, rate, max_m, max_p, &m, &p);
} else {
rate = ccu_mp_find_best_with_parent_adj(hw, parent_rate, rate,
max_m, max_p);
--
2.35.1
next reply other threads:[~2022-08-10 1:41 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-08-10 1:40 Samuel Holland [this message]
2022-08-14 10:02 ` [PATCH] clk: sunxi-ng: mp: Avoid computing the rate twice Jernej Škrabec
2022-08-15 17:26 ` Stephen Boyd
2022-12-31 17:21 ` Samuel Holland
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