Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751416AbdL3BSc (ORCPT ); Fri, 29 Dec 2017 20:18:32 -0500 Received: from mail-wm0-f65.google.com ([74.125.82.65]:34984 "EHLO mail-wm0-f65.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751111AbdL3BNb (ORCPT ); Fri, 29 Dec 2017 20:13:31 -0500 X-Google-Smtp-Source: ACJfBoshIce/tfmG/G3GbS0gIbs4pV9B5ldrOf3t7fl/eaQG9GYxY3nLc89q2t+z0aWycRTQbxlcSw== From: "Bryan O'Donoghue" To: mturquette@baylibre.com, sboyd@codeaurora.org, linux-kernel@vger.kernel.org, linux-clk@vger.kernel.org Cc: pure.logic@nexus-software.ie, Shawn Guo Subject: [PATCH 18/33] clk: mxs: change clk_frac_round_rate() return logic Date: Sat, 30 Dec 2017 01:12:57 +0000 Message-Id: <1514596392-22270-19-git-send-email-pure.logic@nexus-software.ie> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1514596392-22270-1-git-send-email-pure.logic@nexus-software.ie> References: <1514596392-22270-1-git-send-email-pure.logic@nexus-software.ie> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1335 Lines: 42 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 Cc: Michael Turquette Cc: Stephen Boyd Cc: linux-clk@vger.kernel.org Cc: linux-kernel@vger.kernel.org Cc: Shawn Guo --- drivers/clk/mxs/clk-frac.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/clk/mxs/clk-frac.c b/drivers/clk/mxs/clk-frac.c index f57281f..9debf86 100644 --- a/drivers/clk/mxs/clk-frac.c +++ b/drivers/clk/mxs/clk-frac.c @@ -59,7 +59,7 @@ static unsigned long clk_frac_round_rate(struct clk_hw *hw, unsigned long rate, u64 tmp, tmp_rate, result; if (rate > parent_rate) - return -EINVAL; + return 0; tmp = rate; tmp <<= frac->width; @@ -67,7 +67,7 @@ static unsigned long clk_frac_round_rate(struct clk_hw *hw, unsigned long rate, div = tmp; if (!div) - return -EINVAL; + return 0; tmp_rate = (u64)parent_rate * div; result = tmp_rate >> frac->width; -- 2.7.4