From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: MIME-Version: 1.0 Received: from mail-pf0-x241.google.com (mail-pf0-x241.google.com. [2607:f8b0:400e:c00::241]) by gmr-mx.google.com with ESMTPS id p88si8636056pfi.0.2016.01.04.10.31.40 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Mon, 04 Jan 2016 10:31:40 -0800 (PST) Received: by mail-pf0-x241.google.com with SMTP id 78so20481790pfw.0 for ; Mon, 04 Jan 2016 10:31:40 -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 4/8] rtc-pcf2123: refactor chip reset into a function Date: Mon, 4 Jan 2016 10:31:22 -0800 Message-Id: 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: , Refactor chip reset items into its own function, isolating it from the rest of the device probe. Subsequent commits will avoid calling this code. Signed-off-by: Joshua Clayton --- drivers/rtc/rtc-pcf2123.c | 64 ++++++++++++++++++++++++++--------------------- 1 file changed, 36 insertions(+), 28 deletions(-) diff --git a/drivers/rtc/rtc-pcf2123.c b/drivers/rtc/rtc-pcf2123.c index 0f2ce45..2d886d4 100644 --- a/drivers/rtc/rtc-pcf2123.c +++ b/drivers/rtc/rtc-pcf2123.c @@ -272,6 +272,40 @@ static int pcf2123_rtc_set_time(struct device *dev, struct rtc_time *tm) return 0; } +static int pcf2123_reset(struct device *dev) +{ + int ret; + u8 rxbuf[2]; + + ret = pcf2123_write_reg(dev, PCF2123_REG_CTRL1, CTRL1_SW_RESET); + if (ret < 0) + return ret; + + /* Stop the counter */ + dev_dbg(dev, "stopping RTC\n"); + ret = pcf2123_write_reg(dev, PCF2123_REG_CTRL1, CTRL1_STOP); + if (ret < 0) + return ret; + + /* See if the counter was actually stopped */ + dev_dbg(dev, "checking for presence of RTC\n"); + ret = pcf2123_read(dev, PCF2123_REG_CTRL1, rxbuf, sizeof(rxbuf)); + if (ret < 0) + return ret; + + dev_dbg(dev, "received data from RTC (0x%02X 0x%02X)\n", + rxbuf[0], rxbuf[1]); + if (!(rxbuf[0] & CTRL1_STOP)) + return -ENODEV; + + /* Start the counter */ + ret = pcf2123_write_reg(dev, PCF2123_REG_CTRL1, CTRL1_CLEAR); + if (ret < 0) + return ret; + + return 0; +} + static const struct rtc_class_ops pcf2123_rtc_ops = { .read_time = pcf2123_rtc_read_time, .set_time = pcf2123_rtc_set_time, @@ -281,7 +315,6 @@ static int pcf2123_probe(struct spi_device *spi) { struct rtc_device *rtc; struct pcf2123_plat_data *pdata; - u8 rxbuf[2]; int ret, i; pdata = devm_kzalloc(&spi->dev, sizeof(struct pcf2123_plat_data), @@ -290,29 +323,9 @@ static int pcf2123_probe(struct spi_device *spi) return -ENOMEM; spi->dev.platform_data = pdata; - /* Send a software reset command */ - 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; - - /* Stop the counter */ - dev_dbg(&spi->dev, "stopping RTC\n"); - ret = pcf2123_write_reg(&spi->dev, PCF2123_REG_CTRL1, CTRL1_STOP); - if (ret < 0) - goto kfree_exit; - - /* See if the counter was actually stopped */ - dev_dbg(&spi->dev, "checking for presence of RTC\n"); - ret = pcf2123_read(&spi->dev, PCF2123_REG_CTRL1, rxbuf, sizeof(rxbuf)); - dev_dbg(&spi->dev, "received data from RTC (0x%02X 0x%02X)\n", - rxbuf[0], rxbuf[1]); - if (ret < 0) - goto kfree_exit; - - if (!(rxbuf[0] & 0x20)) { + ret = pcf2123_reset(&spi->dev); + if (ret < 0) { dev_err(&spi->dev, "chip not found\n"); - ret = -ENODEV; goto kfree_exit; } @@ -320,11 +333,6 @@ static int pcf2123_probe(struct spi_device *spi) dev_info(&spi->dev, "spiclk %u KHz.\n", (spi->max_speed_hz + 500) / 1000); - /* Start the counter */ - ret = pcf2123_write_reg(&spi->dev, PCF2123_REG_CTRL1, CTRL1_CLEAR); - if (ret < 0) - goto kfree_exit; - /* Finalize the initialization */ rtc = devm_rtc_device_register(&spi->dev, pcf2123_driver.driver.name, &pcf2123_rtc_ops, THIS_MODULE); -- 2.5.0 -- -- You received this message because you are subscribed to "rtc-linux". Membership options at http://groups.google.com/group/rtc-linux . Please read http://groups.google.com/group/rtc-linux/web/checklist before submitting a driver. --- You received this message because you are subscribed to the Google Groups "rtc-linux" group. To unsubscribe from this group and stop receiving emails from it, send an email to rtc-linux+unsubscribe@googlegroups.com. For more options, visit https://groups.google.com/d/optout.