From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751806AbdGBMYk (ORCPT ); Sun, 2 Jul 2017 08:24:40 -0400 Received: from mail-pg0-f67.google.com ([74.125.83.67]:34415 "EHLO mail-pg0-f67.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751611AbdGBMYi (ORCPT ); Sun, 2 Jul 2017 08:24:38 -0400 Date: Sun, 2 Jul 2017 20:24:26 +0800 From: Lynn Lei To: sudipm.mukherjee@gmail.com Cc: teddy.wang@siliconmotion.com, gregkh@linuxfoundation.org, linux-fbdev@vger.kernel.org, devel@driverdev.osuosl.org, linux-kernel@vger.kernel.org Subject: [PATCH] staging: sm750fb: refactor the clock frequency calculation method Message-ID: <20170702122426.GA17561@lynnl.wit> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org speed up calculation by merging two divisions into one. Signed-off-by: Lynn Lei --- drivers/staging/sm750fb/ddk750_chip.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/staging/sm750fb/ddk750_chip.c b/drivers/staging/sm750fb/ddk750_chip.c index c51761221131..5970c3792f27 100644 --- a/drivers/staging/sm750fb/ddk750_chip.c +++ b/drivers/staging/sm750fb/ddk750_chip.c @@ -44,7 +44,7 @@ static unsigned int get_mxclk_freq(void) OD = (pll_reg & PLL_CTRL_OD_MASK) >> PLL_CTRL_OD_SHIFT; POD = (pll_reg & PLL_CTRL_POD_MASK) >> PLL_CTRL_POD_SHIFT; - return DEFAULT_INPUT_CLOCK * M / N / (1 << OD) / (1 << POD); + return DEFAULT_INPUT_CLOCK * M / N / (1 << (OD + POD)); } /* -- 2.13.2