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[212.204.172.199]) by smtp.gmail.com with ESMTPSA id w2sm39361075edb.4.2018.01.01.11.43.35 (version=TLS1_2 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Mon, 01 Jan 2018 11:43:35 -0800 (PST) From: Bryan O'Donoghue To: mturquette@baylibre.com, sboyd@codeaurora.org, linux-kernel@vger.kernel.org, linux-clk@vger.kernel.org Cc: Bryan O'Donoghue , Joachim Eastwood , linux-arm-kernel@lists.infradead.org Subject: [PATCH v3 20/34] clk: nxp: change lpc18xx_pll0_round_rate() return logic Date: Mon, 1 Jan 2018 19:42:59 +0000 Message-Id: <1514835793-1104-21-git-send-email-pure.logic@nexus-software.ie> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1514835793-1104-1-git-send-email-pure.logic@nexus-software.ie> References: <1514835793-1104-1-git-send-email-pure.logic@nexus-software.ie> Sender: linux-clk-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-clk@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP 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: Joachim Eastwood 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 --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;