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[v3,20/34] clk: nxp: change lpc18xx_pll0_round_rate() return logic

Message ID 1514835793-1104-21-git-send-email-pure.logic@nexus-software.ie (mailing list archive)
State Rejected, archived
Headers show

Commit Message

Bryan O'Donoghue Jan. 1, 2018, 7:42 p.m. UTC 
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@nexus-software.ie>
Cc: Michael Turquette <mturquette@baylibre.com>
Cc: Stephen Boyd <sboyd@codeaurora.org>
Cc: Joachim Eastwood <manabian@gmail.com>
Cc: linux-clk@vger.kernel.org
Cc: linux-arm-kernel@lists.infradead.org
Cc: linux-kernel@vger.kernel.org
---
 drivers/clk/nxp/clk-lpc18xx-cgu.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)
diff mbox

Patch

diff --git a/drivers/clk/nxp/clk-lpc18xx-cgu.c b/drivers/clk/nxp/clk-lpc18xx-cgu.c
index e08bad9..396d4f7 100644
--- a/drivers/clk/nxp/clk-lpc18xx-cgu.c
+++ b/drivers/clk/nxp/clk-lpc18xx-cgu.c
@@ -381,13 +381,13 @@  static unsigned long lpc18xx_pll0_round_rate(struct clk_hw *hw,
 
 	if (*prate < rate) {
 		pr_warn("%s: pll dividers not supported\n", __func__);
-		return -EINVAL;
+		return 0;
 	}
 
 	m = DIV_ROUND_UP_ULL(*prate, rate * 2);
 	if (m <= 0 && m > LPC18XX_PLL0_MSEL_MAX) {
 		pr_warn("%s: unable to support rate %lu\n", __func__, rate);
-		return -EINVAL;
+		return 0;
 	}
 
 	return 2 * *prate * m;