linux-kernel - [PATCH RFC v7 01/21] clk: divider: Correct parent clk round rate if no bestdiv is normally found

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <1419910451-15268-2-git-send-email-Ying.Liu@freescale.com>
Date:	Tue, 30 Dec 2014 11:33:51 +0800
From:	Liu Ying <Ying.Liu@...escale.com>
To:	<dri-devel@...ts.freedesktop.org>
CC:	<devicetree@...r.kernel.org>,
	<linux-arm-kernel@...ts.infradead.org>, <linux@....linux.org.uk>,
	<kernel@...gutronix.de>, <p.zabel@...gutronix.de>,
	<thierry.reding@...il.com>, <shawn.guo@...aro.org>,
	<mturquette@...aro.org>, <airlied@...ux.ie>, <andyshrk@...il.com>,
	<stefan.wahren@...e.com>, <a.hajda@...sung.com>,
	<linux-kernel@...r.kernel.org>
Subject: [PATCH RFC v7 01/21] clk: divider: Correct parent clk round rate if no bestdiv is normally found

If no best divider is normally found, we will try to use the maximum divider.
We should not set the parent clock rate to be 1Hz by force for being rounded.
Instead, we should take the maximum divider as a base and calculate a correct
parent clock rate for being rounded.

Signed-off-by: Liu Ying <Ying.Liu@...escale.com>
---
v6->v7:
 * None.

v5->v6:
 * None.

v4->v5:
 * None.

v3->v4:
 * None.

v2->v3:
 * None.

v1->v2:
 * None.

 drivers/clk/clk-divider.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/clk/clk-divider.c b/drivers/clk/clk-divider.c
index c0a842b..f641d4b 100644
--- a/drivers/clk/clk-divider.c
+++ b/drivers/clk/clk-divider.c
@@ -311,7 +311,8 @@ static int clk_divider_bestdiv(struct clk_hw *hw, unsigned long rate,
 
 	if (!bestdiv) {
 		bestdiv = _get_maxdiv(divider);
-		*best_parent_rate = __clk_round_rate(__clk_get_parent(hw->clk), 1);
+		*best_parent_rate = __clk_round_rate(__clk_get_parent(hw->clk),
+						MULT_ROUND_UP(rate, bestdiv));
 	}
 
 	return bestdiv;
-- 
2.1.0

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/