[PATCH v2 31/34] clk: at91: change round_rate() return logic

[Bryan O'Donoghue]

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.lo...@nexus-software.ie>
Cc: Boris Brezillon <boris.brezil...@free-electrons.com>
Cc: Michael Turquette <mturque...@baylibre.com>
Cc: Stephen Boyd <sb...@codeaurora.org>
Cc: Quentin Schulz <quentin.sch...@free-electrons.com>
Cc: linux-...@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
---
 drivers/clk/at91/clk-audio-pll.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/clk/at91/clk-audio-pll.c b/drivers/clk/at91/clk-audio-pll.c
index 56227cb..48231e3 100644
--- a/drivers/clk/at91/clk-audio-pll.c
+++ b/drivers/clk/at91/clk-audio-pll.c
@@ -278,7 +278,7 @@ static unsigned long clk_audio_pll_pad_round_rate(struct 
clk_hw *hw,
                                                  unsigned long *parent_rate)
 {
        struct clk_hw *pclk = clk_hw_get_parent(hw);
-       long best_rate = -EINVAL;
+       unsigned long best_rate = 0;
        unsigned long best_parent_rate;
        unsigned long tmp_qd;
        u32 div;
@@ -330,7 +330,7 @@ static unsigned long clk_audio_pll_pmc_round_rate(struct 
clk_hw *hw,
                                                  unsigned long *parent_rate)
 {
        struct clk_hw *pclk = clk_hw_get_parent(hw);
-       long best_rate = -EINVAL;
+       unsigned long best_rate = 0;
        unsigned long best_parent_rate = 0;
        u32 tmp_qd = 0, div;
        long tmp_rate;
-- 
2.7.4