From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933803AbcLGX1w (ORCPT ); Wed, 7 Dec 2016 18:27:52 -0500 Received: from mail-wm0-f67.google.com ([74.125.82.67]:33534 "EHLO mail-wm0-f67.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S933758AbcLGX1t (ORCPT ); Wed, 7 Dec 2016 18:27:49 -0500 From: Emil Bartczak To: a.zummo@towertech.it Cc: alexandre.belloni@free-electrons.com, rtc-linux@googlegroups.com, linux-kernel@vger.kernel.org, Emil Bartczak Subject: [PATCH v2 1/6] rtc: mcp795: use bcd2bin/bin2bcd. Date: Thu, 8 Dec 2016 00:27:37 +0100 Message-Id: <943d1f040287db44d7bf674eb959c707d056c31c.1481151278.git.emilbart@gmail.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: References: In-Reply-To: References: Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Change rtc-mcp795.c to use the bcd2bin/bin2bcd functions. This change fixes the wrong conversion of month value from binary to BCD (missing right shift operation for 10 month). Signed-off-by: Emil Bartczak --- drivers/rtc/rtc-mcp795.c | 25 +++++++++++++------------ 1 file changed, 13 insertions(+), 12 deletions(-) diff --git a/drivers/rtc/rtc-mcp795.c b/drivers/rtc/rtc-mcp795.c index 4021fd0..0389ee0 100644 --- a/drivers/rtc/rtc-mcp795.c +++ b/drivers/rtc/rtc-mcp795.c @@ -21,6 +21,7 @@ #include #include #include +#include /* MCP795 Instructions, see datasheet table 3-1 */ #define MCP795_EEREAD 0x03 @@ -104,16 +105,16 @@ static int mcp795_set_time(struct device *dev, struct rtc_time *tim) if (ret) return ret; - data[0] = (data[0] & 0x80) | ((tim->tm_sec / 10) << 4) | (tim->tm_sec % 10); - data[1] = (data[1] & 0x80) | ((tim->tm_min / 10) << 4) | (tim->tm_min % 10); - data[2] = ((tim->tm_hour / 10) << 4) | (tim->tm_hour % 10); - data[4] = ((tim->tm_mday / 10) << 4) | ((tim->tm_mday) % 10); - data[5] = (data[5] & 0x10) | (tim->tm_mon / 10) | (tim->tm_mon % 10); + data[0] = (data[0] & 0x80) | bin2bcd(tim->tm_sec); + data[1] = (data[1] & 0x80) | bin2bcd(tim->tm_min); + data[2] = bin2bcd(tim->tm_hour); + data[4] = bin2bcd(tim->tm_mday); + data[5] = (data[5] & 0x10) | bin2bcd(tim->tm_mon); if (tim->tm_year > 100) tim->tm_year -= 100; - data[6] = ((tim->tm_year / 10) << 4) | (tim->tm_year % 10); + data[6] = bin2bcd(tim->tm_year); ret = mcp795_rtcc_write(dev, 0x01, data, sizeof(data)); @@ -137,12 +138,12 @@ static int mcp795_read_time(struct device *dev, struct rtc_time *tim) if (ret) return ret; - tim->tm_sec = ((data[0] & 0x70) >> 4) * 10 + (data[0] & 0x0f); - tim->tm_min = ((data[1] & 0x70) >> 4) * 10 + (data[1] & 0x0f); - tim->tm_hour = ((data[2] & 0x30) >> 4) * 10 + (data[2] & 0x0f); - tim->tm_mday = ((data[4] & 0x30) >> 4) * 10 + (data[4] & 0x0f); - tim->tm_mon = ((data[5] & 0x10) >> 4) * 10 + (data[5] & 0x0f); - tim->tm_year = ((data[6] & 0xf0) >> 4) * 10 + (data[6] & 0x0f) + 100; /* Assume we are in 20xx */ + tim->tm_sec = bcd2bin(data[0] & 0x7F); + tim->tm_min = bcd2bin(data[1] & 0x7F); + tim->tm_hour = bcd2bin(data[2] & 0x3F); + tim->tm_mday = bcd2bin(data[4] & 0x3F); + tim->tm_mon = bcd2bin(data[5] & 0x1F); + tim->tm_year = bcd2bin(data[6]) + 100; /* Assume we are in 20xx */ dev_dbg(dev, "Read from mcp795: %04d-%02d-%02d %02d:%02d:%02d\n", tim->tm_year + 1900, tim->tm_mon, tim->tm_mday, -- 2.7.4