From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752039Ab0HUMaw (ORCPT ); Sat, 21 Aug 2010 08:30:52 -0400 Received: from comal.ext.ti.com ([198.47.26.152]:47020 "EHLO comal.ext.ti.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752009Ab0HUMat (ORCPT ); Sat, 21 Aug 2010 08:30:49 -0400 From: hvaibhav@ti.com To: linux-kernel@vger.kernel.org Cc: akpm@linux-foundation.org, byron.bbradley@gmail.com, linux-omap@vger.kernel.org, felipe.balbi@nokia.com, Vaibhav Hiremath Subject: [PATCH-V2 3/3] RTC:s35390a: Add update_irq (per Min interrupt) support Date: Sat, 21 Aug 2010 18:00:29 +0530 Message-Id: <1282393829-7326-4-git-send-email-hvaibhav@ti.com> X-Mailer: git-send-email 1.6.2.4 In-Reply-To: References: Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Vaibhav Hiremath S35390A RTC supports per minute steady interrupt, after configuration device steadily keeps on generating interrupts every minute. So add related RTC API's - - update_irq_enable Signed-off-by: Vaibhav Hiremath --- drivers/rtc/rtc-s35390a.c | 32 ++++++++++++++++++++++++++++++++ 1 files changed, 32 insertions(+), 0 deletions(-) diff --git a/drivers/rtc/rtc-s35390a.c b/drivers/rtc/rtc-s35390a.c index d8d59d7..34c9c47 100644 --- a/drivers/rtc/rtc-s35390a.c +++ b/drivers/rtc/rtc-s35390a.c @@ -390,6 +390,35 @@ static int s35390a_rtc_set_irq_freq(struct device *dev, int freq) return s35390a_set_irq_freq(to_i2c_client(dev), freq); } +static int s35390a_update_irq_enable(struct i2c_client *client, + unsigned enabled) +{ + struct s35390a *s35390a = i2c_get_clientdata(client); + char buf[1]; + + if (s35390a_get_reg(s35390a, S35390A_CMD_STATUS2, buf, sizeof(buf)) < 0) + return -EIO; + + /* This chip returns the bits of each byte in reverse order */ + buf[0] = bitrev8(buf[0]); + + buf[0] &= ~S35390A_INT1_MODE_MASK; + if (enabled) + buf[0] |= S35390A_INT1_MODE_PMIN_STDY; + else + buf[0] |= S35390A_INT1_MODE_NOINTR; + + /* This chip expects the bits of each byte in reverse order */ + buf[0] = bitrev8(buf[0]); + + return s35390a_set_reg(s35390a, S35390A_CMD_STATUS2, buf, sizeof(buf)); +} + +static int s35390a_rtc_update_irq_enable(struct device *dev, unsigned enabled) +{ + return s35390a_update_irq_enable(to_i2c_client(dev), enabled); +} + static irqreturn_t s35390a_irq_thread(int irq, void *handle) { char buf[1]; @@ -406,6 +435,8 @@ static irqreturn_t s35390a_irq_thread(int irq, void *handle) if (buf[0] & BIT(2)) { rtc_update_irq(s35390a->rtc, 1, RTC_IRQF | RTC_AF); s35390a_alarm_irq_enable(client, 0); + } else if (buf[0] & BIT(1)) { + rtc_update_irq(s35390a->rtc, 1, RTC_IRQF | RTC_UF); } else if (buf[0] & BIT(0)) { rtc_update_irq(s35390a->rtc, 1, RTC_IRQF | RTC_PF); } @@ -422,6 +453,7 @@ static const struct rtc_class_ops s35390a_rtc_ops = { .read_alarm = s35390a_rtc_read_alarm, .irq_set_freq = s35390a_rtc_set_irq_freq, .irq_set_state = s35390a_rtc_freq_irq_enable, + .update_irq_enable = s35390a_rtc_update_irq_enable, }; static struct i2c_driver s35390a_driver; -- 1.6.2.4