linux-kernel - [PATCH 10/33] clk: bcm: iproc: change iproc_asiu_clk_round

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Date:   Sat, 30 Dec 2017 01:12:49 +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, Ray Jui <rjui@...adcom.com>,
        Scott Branden <sbranden@...adcom.com>,
        Jon Mason <jonmason@...adcom.com>,
        bcm-kernel-feedback-list@...adcom.com,
        linux-arm-kernel@...ts.infradead.org
Subject: [PATCH 10/33] clk: bcm: iproc: change iproc_asiu_clk_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: Ray Jui <rjui@...adcom.com>
Cc: Scott Branden <sbranden@...adcom.com>
Cc: Jon Mason <jonmason@...adcom.com>
Cc: bcm-kernel-feedback-list@...adcom.com
Cc: linux-clk@...r.kernel.org
Cc: linux-arm-kernel@...ts.infradead.org
Cc: linux-kernel@...r.kernel.org
---
 drivers/clk/bcm/clk-iproc-asiu.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/clk/bcm/clk-iproc-asiu.c b/drivers/clk/bcm/clk-iproc-asiu.c
index ae40d08..f89872e 100644
--- a/drivers/clk/bcm/clk-iproc-asiu.c
+++ b/drivers/clk/bcm/clk-iproc-asiu.c
@@ -115,7 +115,7 @@ static unsigned long iproc_asiu_clk_round_rate(struct clk_hw *hw,
 	unsigned int div;
 
 	if (rate == 0 || *parent_rate == 0)
-		return -EINVAL;
+		return 0;
 
 	if (rate == *parent_rate)
 		return *parent_rate;
-- 
2.7.4