From mboxrd@z Thu Jan 1 00:00:00 1970 From: Stephen Boyd Subject: Re: [PATCH v2 1/2] tty: serial: msm: Add mask value for UART_DM registers Date: Wed, 08 Apr 2015 16:31:52 -0700 Message-ID: <5525BA68.7060602@codeaurora.org> References: <1428499733-21963-1-git-send-email-gpramod@codeaurora.org> Mime-Version: 1.0 Content-Type: text/plain; charset=windows-1252 Content-Transfer-Encoding: 7bit Return-path: Received: from smtp.codeaurora.org ([198.145.29.96]:33166 "EHLO smtp.codeaurora.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753681AbbDHXby (ORCPT ); Wed, 8 Apr 2015 19:31:54 -0400 In-Reply-To: <1428499733-21963-1-git-send-email-gpramod@codeaurora.org> Sender: linux-arm-msm-owner@vger.kernel.org List-Id: linux-arm-msm@vger.kernel.org To: Pramod Gurav , linux-arm-msm@vger.kernel.org, linux-serial@vger.kernel.org, linux-kernel@vger.kernel.org Cc: gregkh@linuxfoundation.org, bryanh@codeaurora.org, jslaby@suse.cz On 04/08/15 06:28, Pramod Gurav wrote: > diff --git a/drivers/tty/serial/msm_serial.c b/drivers/tty/serial/msm_serial.c > index b73889c..4c1e9ea 100644 > --- a/drivers/tty/serial/msm_serial.c > +++ b/drivers/tty/serial/msm_serial.c > @@ -432,8 +432,13 @@ static int msm_set_baud_rate(struct uart_port *port, unsigned int baud) > /* RX stale watermark */ > rxstale = entry->rxstale; > watermark = UART_IPR_STALE_LSB & rxstale; > - watermark |= UART_IPR_RXSTALE_LAST; > - watermark |= UART_IPR_STALE_TIMEOUT_MSB & (rxstale << 2); > + if (msm_port->is_uartdm) > + watermark |= UART_DM_IPR_STALE_TIMEOUT_MSB & (rxstale << 2); > + else { > + watermark |= UART_IPR_RXSTALE_LAST; > + watermark |= UART_IPR_STALE_TIMEOUT_MSB & (rxstale << 2); > + } > + > msm_write(port, watermark, UART_IPR); > This could be written like so: if (msm_port->is_uartdm) { mask = UART_DM_IPR_STALE_TIMEOUT_MSB; } else { watermark |= UART_IPR_RXSTALE_LAST; mask = UART_IPR_STALE_TIMEOUT_MSB; } watermark |= mask & (rxstale << 2); so that we don't duplicate the rfr_level << 2 part. > /* set RX watermark */ > @@ -496,9 +501,15 @@ static int msm_startup(struct uart_port *port) > > /* set automatic RFR level */ > data = msm_read(port, UART_MR1); > - data &= ~UART_MR1_AUTO_RFR_LEVEL1; > + if (msm_port->is_uartdm) { > + data &= ~UART_DM_MR1_AUTO_RFR_LEVEL1; > + data |= UART_DM_MR1_AUTO_RFR_LEVEL1 & (rfr_level << 2); > + } else { > + data &= ~UART_MR1_AUTO_RFR_LEVEL1; > + data |= UART_MR1_AUTO_RFR_LEVEL1 & (rfr_level << 2); > + } > + > data &= ~UART_MR1_AUTO_RFR_LEVEL0; > - data |= UART_MR1_AUTO_RFR_LEVEL1 & (rfr_level << 2); > data |= UART_MR1_AUTO_RFR_LEVEL0 & rfr_level; > msm_write(port, data, UART_MR1); > return 0; This could be written like so: if (msm_port->is_uartdm) mask = UART_DM_MR1_AUTO_RFR_LEVEL1; else mask = UART_MR1_AUTO_RFR_LEVE1; data &= ~mask; data &= ~UART_MR1_AUTO_RFR_LEVEL0; data |= mask & (rfr_level << 2); data |= UART_MR1_AUTO_RFR_LEVEL0 & rfr_level; so that we don't duplicate the rfr_level << 2 part. -- Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum, a Linux Foundation Collaborative Project