linux-kernel - [PATCH 17/33] clk: mvebu: change dove_round

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Message-Id: <1514596392-22270-18-git-send-email-pure.logic@nexus-software.ie>
Date:   Sat, 30 Dec 2017 01:12:56 +0000
From:   Bryan O'Donoghue <pure.logic@...us-software.ie>
To:     mturquette@...libre.com, sboyd@...eaurora.org,
        linux-kernel@...r.kernel.org, linux-clk@...r.kernel.org
Cc:     pure.logic@...us-software.ie,
        Russell King <rmk+kernel@....linux.org.uk>
Subject: [PATCH 17/33] clk: mvebu: change dove_round_rate() return logic

This patch updates the round_rate() logic here to return zero instead of a
negative number on error.

In conjunction with higher-level changes associated with acting on the
return value of clk_ops->round_rate() it is then possible to have
clk_ops->round_rate() return values from 1 Hz to ULONG_MAX Hz instead of
the current limitation of 1 Hz to LONG_MAX Hz.

Signed-off-by: Bryan O'Donoghue <pure.logic@...us-software.ie>
Cc: Michael Turquette <mturquette@...libre.com>
Cc: Stephen Boyd <sboyd@...eaurora.org>
Cc: linux-clk@...r.kernel.org
Cc: linux-kernel@...r.kernel.org
Cc: Russell King <rmk+kernel@....linux.org.uk>
---
 drivers/clk/mvebu/dove-divider.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/clk/mvebu/dove-divider.c b/drivers/clk/mvebu/dove-divider.c
index 234ba0a..7704b5e 100644
--- a/drivers/clk/mvebu/dove-divider.c
+++ b/drivers/clk/mvebu/dove-divider.c
@@ -117,7 +117,7 @@ static unsigned long dove_round_rate(struct clk_hw *hw, unsigned long rate,
 
 	divider = dove_calc_divider(dc, rate, parent_rate, false);
 	if (divider < 0)
-		return divider;
+		return 0;
 
 	rate = DIV_ROUND_CLOSEST(parent_rate, divider);
 
-- 
2.7.4