From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id A1552C433FE for ; Wed, 10 Nov 2021 14:14:50 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 875A0610CF for ; Wed, 10 Nov 2021 14:14:50 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232201AbhKJORg (ORCPT ); Wed, 10 Nov 2021 09:17:36 -0500 Received: from smtp2.axis.com ([195.60.68.18]:1369 "EHLO smtp2.axis.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232140AbhKJORe (ORCPT ); Wed, 10 Nov 2021 09:17:34 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=axis.com; q=dns/txt; s=axis-central1; t=1636553687; x=1668089687; h=from:to:cc:subject:date:message-id:mime-version: content-transfer-encoding; bh=UY7psuy2ya+gdc/YToDbQCyYhSN3kpAe6lpC4hUBjm4=; b=etQ9ZWGlek81gNV7wcZhEBoSSVsi0t7FRKe9HCH7vV6Ed1+k+uSP/KYB gPb3Oy7PYrHLedMfmG0EgG8/r1cFwkgL1MLt7azLiNgF2sdFBqFflcyaP a3QYXEHngNQtD+62PmwR8IPYSjHEhfcQsYIOsN0ecYLiyeL3QgXOV1hxi tKejolMlM11yaIMfNGdqgiH7uKIezJCl9WOYdccKzyF/+ca4SIBaQCjxf nFnKpnj9NGALZZ3mPmBQZfKGd6yCr08W69U97FbEvvzhFqxihZv3FCL/e VgeGPfPrvolNYV6bu9I7IxDGrVUqepoHycQ7vH1uashkLkzJCtw4+TKpL A==; From: Camel Guo To: Alessandro Zummo , Alexandre Belloni CC: , Camel Guo , , Subject: [PATCH v2] rtc: rs5c372: Add RTC_VL_READ, RTC_VL_CLR ioctls Date: Wed, 10 Nov 2021 15:14:42 +0100 Message-ID: <20211110141442.9603-1-camel.guo@axis.com> X-Mailer: git-send-email 2.20.1 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Camel Guo In order to make it possible to get battery voltage status, this commit adds RTC_VL_READ, RTC_VL_CLR ioctl commands to rtc-rs5c372. Signed-off-by: Camel Guo --- v2: Set RTC_VL_BACKUP_LOW if VDET is set. Do not clear PON, XSTP in RTC_VL_CLR ioctl drivers/rtc/rtc-rs5c372.c | 60 +++++++++++++++++++++++++++++++++++++++ 1 file changed, 60 insertions(+) diff --git a/drivers/rtc/rtc-rs5c372.c b/drivers/rtc/rtc-rs5c372.c index 80980414890c..4ab8718d9360 100644 --- a/drivers/rtc/rtc-rs5c372.c +++ b/drivers/rtc/rtc-rs5c372.c @@ -485,6 +485,65 @@ static int rs5c372_rtc_proc(struct device *dev, struct seq_file *seq) #define rs5c372_rtc_proc NULL #endif +#ifdef CONFIG_RTC_INTF_DEV +static int rs5c372_ioctl(struct device *dev, unsigned int cmd, unsigned long arg) +{ + struct rs5c372 *rs5c = i2c_get_clientdata(to_i2c_client(dev)); + unsigned char ctrl2; + int addr; + unsigned int flags; + + dev_dbg(dev, "%s: cmd=%x\n", __func__, cmd); + + addr = RS5C_ADDR(RS5C_REG_CTRL2); + ctrl2 = i2c_smbus_read_byte_data(rs5c->client, addr); + + switch (cmd) { + case RTC_VL_READ: + flags = 0; + + switch (rs5c->type) { + case rtc_r2025sd: + case rtc_r2221tl: + if ((rs5c->type == rtc_r2025sd && !(ctrl2 & R2x2x_CTRL2_XSTP)) || + (rs5c->type == rtc_r2221tl && (ctrl2 & R2x2x_CTRL2_XSTP))) { + flags |= RTC_VL_DATA_INVALID; + } + if (ctrl2 & R2x2x_CTRL2_VDET) + flags |= RTC_VL_BACKUP_LOW; + break; + default: + if (ctrl2 & RS5C_CTRL2_XSTP) + flags |= RTC_VL_DATA_INVALID; + break; + } + + return put_user(flags, (unsigned int __user *)arg); + case RTC_VL_CLR: + /* clear VDET bit */ + switch (rs5c->type) { + case rtc_r2025sd: + case rtc_r2221tl: + ctrl2 &= ~R2x2x_CTRL2_VDET; + default: + break; + } + + if (i2c_smbus_write_byte_data(rs5c->client, addr, ctrl2) < 0) { + dev_dbg(&rs5c->client->dev, "%s: write error in line %i\n", + __func__, __LINE__); + return -EIO; + } + return 0; + default: + return -ENOIOCTLCMD; + } + return 0; +} +#else +#define rs5c372_ioctl NULL +#endif + static const struct rtc_class_ops rs5c372_rtc_ops = { .proc = rs5c372_rtc_proc, .read_time = rs5c372_rtc_read_time, @@ -492,6 +551,7 @@ static const struct rtc_class_ops rs5c372_rtc_ops = { .read_alarm = rs5c_read_alarm, .set_alarm = rs5c_set_alarm, .alarm_irq_enable = rs5c_rtc_alarm_irq_enable, + .ioctl = rs5c372_ioctl, }; #if IS_ENABLED(CONFIG_RTC_INTF_SYSFS) -- 2.20.1