From: Anson Huang <anson.huang@nxp.com>
To: "a.zummo@towertech.it" <a.zummo@towertech.it>,
"alexandre.belloni@bootlin.com" <alexandre.belloni@bootlin.com>,
"shawnguo@kernel.org" <shawnguo@kernel.org>,
"s.hauer@pengutronix.de" <s.hauer@pengutronix.de>,
"kernel@pengutronix.de" <kernel@pengutronix.de>,
Fabio Estevam <fabio.estevam@nxp.com>,
"linux-rtc@vger.kernel.org" <linux-rtc@vger.kernel.org>,
"linux-arm-kernel@lists.infradead.org"
<linux-arm-kernel@lists.infradead.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
Cc: dl-linux-imx <linux-imx@nxp.com>
Subject: [PATCH] rtc: imx-sc: add rtc set time support
Date: Tue, 22 Jan 2019 03:29:24 +0000 [thread overview]
Message-ID: <1548127476-7958-1-git-send-email-Anson.Huang@nxp.com> (raw)
This patch adds i.MX system controller RTC set time support, the
RTC set time is implemented via SIP(silicon provider) runtime
service call and ARM-Trusted-Firmware will communicate with system
controller via MU(message unit) IPC to set RTC time.
Signed-off-by: Anson Huang <Anson.Huang@nxp.com>
---
drivers/rtc/rtc-imx-sc.c | 19 +++++++++++++++++++
1 file changed, 19 insertions(+)
diff --git a/drivers/rtc/rtc-imx-sc.c b/drivers/rtc/rtc-imx-sc.c
index 7ff0854..60570a2 100644
--- a/drivers/rtc/rtc-imx-sc.c
+++ b/drivers/rtc/rtc-imx-sc.c
@@ -3,6 +3,7 @@
* Copyright 2018 NXP.
*/
+#include <linux/arm-smccc.h>
#include <linux/firmware/imx/sci.h>
#include <linux/module.h>
#include <linux/of.h>
@@ -12,6 +13,9 @@
#define IMX_SC_TIMER_FUNC_GET_RTC_SEC1970 9
#define IMX_SC_TIMER_FUNC_SET_RTC_TIME 6
+#define IMX_SIP_SRTC 0xC2000002
+#define IMX_SIP_SRTC_SET_TIME 0x0
+
static struct imx_sc_ipc *rtc_ipc_handle;
static struct rtc_device *imx_sc_rtc;
@@ -42,8 +46,23 @@ static int imx_sc_rtc_read_time(struct device *dev, struct rtc_time *tm)
return 0;
}
+static int imx_sc_rtc_set_time(struct device *dev, struct rtc_time *tm)
+{
+ struct arm_smccc_res res;
+
+ /* pack 2 time parameters into 1 register, 16 bits for each */
+ arm_smccc_smc(IMX_SIP_SRTC, IMX_SIP_SRTC_SET_TIME,
+ ((tm->tm_year + 1900) << 16) | (tm->tm_mon + 1),
+ (tm->tm_mday << 16) | tm->tm_hour,
+ (tm->tm_min << 16) | tm->tm_sec,
+ 0, 0, 0, &res);
+
+ return res.a0;
+}
+
static const struct rtc_class_ops imx_sc_rtc_ops = {
.read_time = imx_sc_rtc_read_time,
+ .set_time = imx_sc_rtc_set_time,
};
static int imx_sc_rtc_probe(struct platform_device *pdev)
--
2.7.4
next reply other threads:[~2019-01-22 3:29 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-01-22 3:29 Anson Huang [this message]
2019-02-07 19:46 ` [PATCH] rtc: imx-sc: add rtc set time support Alexandre Belloni
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=1548127476-7958-1-git-send-email-Anson.Huang@nxp.com \
--to=anson.huang@nxp.com \
--cc=a.zummo@towertech.it \
--cc=alexandre.belloni@bootlin.com \
--cc=fabio.estevam@nxp.com \
--cc=kernel@pengutronix.de \
--cc=linux-arm-kernel@lists.infradead.org \
--cc=linux-imx@nxp.com \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-rtc@vger.kernel.org \
--cc=s.hauer@pengutronix.de \
--cc=shawnguo@kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).