From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: MIME-Version: 1.0 Received: from mail-pf0-x244.google.com (mail-pf0-x244.google.com. [2607:f8b0:400e:c00::244]) by gmr-mx.google.com with ESMTPS id ui7si3849854pab.0.2016.01.04.10.31.39 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Mon, 04 Jan 2016 10:31:39 -0800 (PST) Received: by mail-pf0-x244.google.com with SMTP id 65so16354733pff.1 for ; Mon, 04 Jan 2016 10:31:39 -0800 (PST) From: Joshua Clayton To: Alexandre Belloni , Alessandro Zummo Cc: rtc-linux@googlegroups.com, linux-kernel@vger.kernel.org, Joshua Clayton Subject: [rtc-linux] [PATCH v2 3/8] rtc-pcf2123: clean up writes to the rtc chip Date: Mon, 4 Jan 2016 10:31:21 -0800 Message-Id: <82c777d8bdfba44a20358fb77e68a08f6dc55bab.1451929910.git.stillcompiling@gmail.com> In-Reply-To: References: In-Reply-To: <0000-cover-letter.patch> References: <0000-cover-letter.patch> Reply-To: rtc-linux@googlegroups.com Content-Type: text/plain; charset=UTF-8 List-ID: List-Post: , List-Help: , List-Archive: , List-Unsubscribe: , Add new functions pcf2123_write(), and pcf2123_write_reg(). Use named defines for the values being written. This improves modularity and readability, and reduces lines of code. Signed-off-by: Joshua Clayton --- drivers/rtc/rtc-pcf2123.c | 67 ++++++++++++++++++++++------------------------- 1 file changed, 32 insertions(+), 35 deletions(-) diff --git a/drivers/rtc/rtc-pcf2123.c b/drivers/rtc/rtc-pcf2123.c index 4c4b3fc..0f2ce45 100644 --- a/drivers/rtc/rtc-pcf2123.c +++ b/drivers/rtc/rtc-pcf2123.c @@ -140,6 +140,27 @@ static int pcf2123_read(struct device *dev, u8 reg, u8 *rxbuf, size_t size) return ret; } +static int pcf2123_write(struct device *dev, u8 *txbuf, size_t size) +{ + struct spi_device *spi = to_spi_device(dev); + int ret; + + txbuf[0] |= PCF2123_WRITE; + ret = spi_write(spi, txbuf, size); + pcf2123_delay_trec(); + + return ret; +} + +static int pcf2123_write_reg(struct device *dev, u8 reg, u8 val) +{ + u8 txbuf[2]; + + txbuf[0] = reg; + txbuf[1] = val; + return pcf2123_write(dev, txbuf, sizeof(txbuf)); +} + static ssize_t pcf2123_show(struct device *dev, struct device_attribute *attr, char *buffer) { @@ -163,9 +184,7 @@ static ssize_t pcf2123_show(struct device *dev, struct device_attribute *attr, static ssize_t pcf2123_store(struct device *dev, struct device_attribute *attr, const char *buffer, size_t count) { - struct spi_device *spi = to_spi_device(dev); struct pcf2123_sysfs_reg *r; - u8 txbuf[2]; unsigned long reg; unsigned long val; @@ -181,12 +200,9 @@ static ssize_t pcf2123_store(struct device *dev, struct device_attribute *attr, if (ret) return ret; - txbuf[0] = PCF2123_WRITE | reg; - txbuf[1] = val; - ret = spi_write(spi, txbuf, sizeof(txbuf)); + pcf2123_write_reg(dev, reg, val); if (ret < 0) return -EIO; - pcf2123_delay_trec(); return count; } @@ -220,7 +236,6 @@ static int pcf2123_rtc_read_time(struct device *dev, struct rtc_time *tm) static int pcf2123_rtc_set_time(struct device *dev, struct rtc_time *tm) { - struct spi_device *spi = to_spi_device(dev); u8 txbuf[8]; int ret; @@ -231,15 +246,12 @@ static int pcf2123_rtc_set_time(struct device *dev, struct rtc_time *tm) tm->tm_mday, tm->tm_mon, tm->tm_year, tm->tm_wday); /* Stop the counter first */ - txbuf[0] = PCF2123_WRITE | PCF2123_REG_CTRL1; - txbuf[1] = 0x20; - ret = spi_write(spi, txbuf, 2); + ret = pcf2123_write_reg(dev, PCF2123_REG_CTRL1, CTRL1_STOP); if (ret < 0) return ret; - pcf2123_delay_trec(); /* Set the new time */ - txbuf[0] = PCF2123_WRITE | PCF2123_REG_SC; + txbuf[0] = PCF2123_REG_SC; txbuf[1] = bin2bcd(tm->tm_sec & 0x7F); txbuf[2] = bin2bcd(tm->tm_min & 0x7F); txbuf[3] = bin2bcd(tm->tm_hour & 0x3F); @@ -248,18 +260,14 @@ static int pcf2123_rtc_set_time(struct device *dev, struct rtc_time *tm) txbuf[6] = bin2bcd((tm->tm_mon + 1) & 0x1F); /* rtc mn 1-12 */ txbuf[7] = bin2bcd(tm->tm_year < 100 ? tm->tm_year : tm->tm_year - 100); - ret = spi_write(spi, txbuf, sizeof(txbuf)); + ret = pcf2123_write(dev, txbuf, sizeof(txbuf)); if (ret < 0) return ret; - pcf2123_delay_trec(); /* Start the counter */ - txbuf[0] = PCF2123_WRITE | PCF2123_REG_CTRL1; - txbuf[1] = 0x00; - ret = spi_write(spi, txbuf, 2); + ret = pcf2123_write_reg(dev, PCF2123_REG_CTRL1, CTRL1_CLEAR); if (ret < 0) return ret; - pcf2123_delay_trec(); return 0; } @@ -273,7 +281,7 @@ static int pcf2123_probe(struct spi_device *spi) { struct rtc_device *rtc; struct pcf2123_plat_data *pdata; - u8 txbuf[2], rxbuf[2]; + u8 rxbuf[2]; int ret, i; pdata = devm_kzalloc(&spi->dev, sizeof(struct pcf2123_plat_data), @@ -283,24 +291,16 @@ static int pcf2123_probe(struct spi_device *spi) spi->dev.platform_data = pdata; /* Send a software reset command */ - txbuf[0] = PCF2123_WRITE | PCF2123_REG_CTRL1; - txbuf[1] = 0x58; - dev_dbg(&spi->dev, "resetting RTC (0x%02X 0x%02X)\n", - txbuf[0], txbuf[1]); - ret = spi_write(spi, txbuf, 2 * sizeof(u8)); + dev_dbg(&spi->dev, "resetting RTC\n"); + ret = pcf2123_write_reg(&spi->dev, PCF2123_REG_CTRL1, CTRL1_SW_RESET); if (ret < 0) goto kfree_exit; - pcf2123_delay_trec(); /* Stop the counter */ - txbuf[0] = PCF2123_WRITE | PCF2123_REG_CTRL1; - txbuf[1] = 0x20; - dev_dbg(&spi->dev, "stopping RTC (0x%02X 0x%02X)\n", - txbuf[0], txbuf[1]); - ret = spi_write(spi, txbuf, 2 * sizeof(u8)); + dev_dbg(&spi->dev, "stopping RTC\n"); + ret = pcf2123_write_reg(&spi->dev, PCF2123_REG_CTRL1, CTRL1_STOP); if (ret < 0) goto kfree_exit; - pcf2123_delay_trec(); /* See if the counter was actually stopped */ dev_dbg(&spi->dev, "checking for presence of RTC\n"); @@ -321,12 +321,9 @@ static int pcf2123_probe(struct spi_device *spi) (spi->max_speed_hz + 500) / 1000); /* Start the counter */ - txbuf[0] = PCF2123_WRITE | PCF2123_REG_CTRL1; - txbuf[1] = 0x00; - ret = spi_write(spi, txbuf, sizeof(txbuf)); + ret = pcf2123_write_reg(&spi->dev, PCF2123_REG_CTRL1, CTRL1_CLEAR); if (ret < 0) goto kfree_exit; - pcf2123_delay_trec(); /* Finalize the initialization */ rtc = devm_rtc_device_register(&spi->dev, pcf2123_driver.driver.name, -- 2.5.0 -- -- You received this message because you are subscribed to "rtc-linux". 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