linux-kernel - [PATCH v3 32/34] clk: ARC: change hsdk_pll_round

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Date:   Mon,  1 Jan 2018 19:43:11 +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:     Bryan O'Donoghue <pure.logic@...us-software.ie>,
        Eugeniy Paltsev <Eugeniy.Paltsev@...opsys.com>
Subject: [PATCH v3 32/34] clk: ARC: change hsdk_pll_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: Eugeniy Paltsev <Eugeniy.Paltsev@...opsys.com>
Cc: Michael Turquette <mturquette@...libre.com>
Cc: Stephen Boyd <sboyd@...eaurora.org>
Cc: linux-clk@...r.kernel.org
Cc: linux-kernel@...r.kernel.org
---
 drivers/clk/clk-hsdk-pll.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/clk/clk-hsdk-pll.c b/drivers/clk/clk-hsdk-pll.c
index 62c8e18..7bff5e3 100644
--- a/drivers/clk/clk-hsdk-pll.c
+++ b/drivers/clk/clk-hsdk-pll.c
@@ -201,7 +201,7 @@ static unsigned long hsdk_pll_round_rate(struct clk_hw *hw, unsigned long rate,
 	const struct hsdk_pll_cfg *pll_cfg = clk->pll_devdata->pll_cfg;
 
 	if (pll_cfg[0].rate == 0)
-		return -EINVAL;
+		return 0;
 
 	best_rate = pll_cfg[0].rate;
 
-- 
2.7.4