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Message-ID: <AM0PR04MB4211CEA77AB034B5DCF71FE2802D0@AM0PR04MB4211.eurprd04.prod.outlook.com>
Date: Tue, 9 Apr 2019 03:25:10 +0000
From: Aisheng Dong <aisheng.dong@....com>
To: Anson Huang <anson.huang@....com>,
"robh+dt@...nel.org" <robh+dt@...nel.org>,
"mark.rutland@....com" <mark.rutland@....com>,
"shawnguo@...nel.org" <shawnguo@...nel.org>,
"s.hauer@...gutronix.de" <s.hauer@...gutronix.de>,
"kernel@...gutronix.de" <kernel@...gutronix.de>,
"festevam@...il.com" <festevam@...il.com>,
"a.zummo@...ertech.it" <a.zummo@...ertech.it>,
"alexandre.belloni@...tlin.com" <alexandre.belloni@...tlin.com>,
"ulf.hansson@...aro.org" <ulf.hansson@...aro.org>,
"sboyd@...nel.org" <sboyd@...nel.org>, Peng Fan <peng.fan@....com>,
Daniel Baluta <daniel.baluta@....com>,
"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
"linux-arm-kernel@...ts.infradead.org"
<linux-arm-kernel@...ts.infradead.org>,
"linux-rtc@...r.kernel.org" <linux-rtc@...r.kernel.org>
CC: dl-linux-imx <linux-imx@....com>
Subject: RE: [PATCH V6 4/4] rtc: imx-sc: add rtc alarm support
> From: Anson Huang
> Sent: Tuesday, April 9, 2019 10:44 AM
> Subject: [PATCH V6 4/4] rtc: imx-sc: add rtc alarm support
>
> Add i.MX system controller RTC alarm support, the RTC alarm 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
> alarm. When RTC alarm fires, system controller will generate a common MU
> irq event and notify system controller RTC driver to handle the irq event.
>
> Signed-off-by: Anson Huang <Anson.Huang@....com>
> ---
> Changes since V5:
> - move the irq alarm enable RPC to imx-scu-irq driver, and rtc driver just
> call the
> API to enable/disable alarm.
> ---
> drivers/rtc/rtc-imx-sc.c | 84
> ++++++++++++++++++++++++++++++++++++++++++++++++
> 1 file changed, 84 insertions(+)
>
> diff --git a/drivers/rtc/rtc-imx-sc.c b/drivers/rtc/rtc-imx-sc.c index
> 19642bf..3eb4db0 100644
> --- a/drivers/rtc/rtc-imx-sc.c
> +++ b/drivers/rtc/rtc-imx-sc.c
> @@ -3,6 +3,7 @@
> * Copyright 2018 NXP.
> */
>
> +#include <dt-bindings/firmware/imx/rsrc.h>
> #include <linux/arm-smccc.h>
> #include <linux/firmware/imx/sci.h>
> #include <linux/module.h>
> @@ -11,11 +12,15 @@
> #include <linux/rtc.h>
>
> #define IMX_SC_TIMER_FUNC_GET_RTC_SEC1970 9
> +#define IMX_SC_TIMER_FUNC_SET_RTC_ALARM 8
> #define IMX_SC_TIMER_FUNC_SET_RTC_TIME 6
>
> #define IMX_SIP_SRTC 0xC2000002
> #define IMX_SIP_SRTC_SET_TIME 0x0
>
> +#define SC_IRQ_GROUP_RTC 2
> +#define SC_IRQ_RTC 1
> +
> static struct imx_sc_ipc *rtc_ipc_handle; static struct rtc_device
> *imx_sc_rtc;
>
> @@ -24,6 +29,16 @@ struct imx_sc_msg_timer_get_rtc_time {
> u32 time;
> } __packed;
>
> +struct imx_sc_msg_timer_rtc_set_alarm {
> + struct imx_sc_rpc_msg hdr;
> + u16 year;
> + u8 mon;
> + u8 day;
> + u8 hour;
> + u8 min;
> + u8 sec;
> +} __packed;
> +
> static int imx_sc_rtc_read_time(struct device *dev, struct rtc_time *tm) {
> struct imx_sc_msg_timer_get_rtc_time msg; @@ -60,9 +75,74 @@ static
> int imx_sc_rtc_set_time(struct device *dev, struct rtc_time *tm)
> return res.a0;
> }
>
> +static int imx_sc_rtc_alarm_irq_enable(struct device *dev, unsigned int
> +enable) {
> + imx_scu_irq_enable(SC_IRQ_GROUP_RTC, SC_IRQ_RTC, enable);
> +
> + return 0;
> +}
> +
> +static int imx_sc_rtc_read_alarm(struct device *dev, struct rtc_wkalrm
> +*alrm) {
I still think here needs a doc explain why needs this and why it's safe to do that.
Otherwise:
Reviewed-by: Dong Aisheng <aisheng.dong@....com>
> + return 0;
> +}
> +
> +static int imx_sc_rtc_set_alarm(struct device *dev, struct rtc_wkalrm
> +*alrm) {
> + struct imx_sc_msg_timer_rtc_set_alarm msg;
> + struct imx_sc_rpc_msg *hdr = &msg.hdr;
> + int ret;
> + struct rtc_time *alrm_tm = &alrm->time;
> +
> + hdr->ver = IMX_SC_RPC_VERSION;
> + hdr->svc = IMX_SC_RPC_SVC_TIMER;
> + hdr->func = IMX_SC_TIMER_FUNC_SET_RTC_ALARM;
> + hdr->size = 3;
> +
> + msg.year = alrm_tm->tm_year + 1900;
> + msg.mon = alrm_tm->tm_mon + 1;
> + msg.day = alrm_tm->tm_mday;
> + msg.hour = alrm_tm->tm_hour;
> + msg.min = alrm_tm->tm_min;
> + msg.sec = alrm_tm->tm_sec;
> +
> + ret = imx_scu_call_rpc(rtc_ipc_handle, &msg, true);
> + if (ret) {
> + dev_err(dev, "set rtc alarm failed, ret %d\n", ret);
> + return ret;
> + }
> +
> + ret = imx_sc_rtc_alarm_irq_enable(dev, alrm->enabled);
> + if (ret) {
> + dev_err(dev, "enable rtc alarm failed, ret %d\n", ret);
> + return ret;
> + }
> +
> + return 0;
> +}
> +
> static const struct rtc_class_ops imx_sc_rtc_ops = {
> .read_time = imx_sc_rtc_read_time,
> .set_time = imx_sc_rtc_set_time,
> + .read_alarm = imx_sc_rtc_read_alarm,
> + .set_alarm = imx_sc_rtc_set_alarm,
> + .alarm_irq_enable = imx_sc_rtc_alarm_irq_enable, };
> +
> +static int imx_sc_rtc_alarm_sc_notify(struct notifier_block *nb,
> + unsigned long event, void *group)
Not necessary to have such a long function name.
Imx_sc_rtc_alarm_notify() should be ok
Regards
Dong Aisheng
> +{
> + /* ignore non-rtc irq */
> + if (!((event & SC_IRQ_RTC) && (*(u8 *)group == SC_IRQ_GROUP_RTC)))
> + return 0;
> +
> + rtc_update_irq(imx_sc_rtc, 1, RTC_IRQF | RTC_AF);
> +
> + return 0;
> +}
> +
> +static struct notifier_block imx_sc_rtc_alarm_sc_notifier = {
> + .notifier_call = imx_sc_rtc_alarm_sc_notify,
> };
>
> static int imx_sc_rtc_probe(struct platform_device *pdev) @@ -73,6 +153,8
> @@ static int imx_sc_rtc_probe(struct platform_device *pdev)
> if (ret)
> return ret;
>
> + device_init_wakeup(&pdev->dev, true);
> +
> imx_sc_rtc = devm_rtc_allocate_device(&pdev->dev);
> if (IS_ERR(imx_sc_rtc))
> return PTR_ERR(imx_sc_rtc);
> @@ -87,6 +169,8 @@ static int imx_sc_rtc_probe(struct platform_device
> *pdev)
> return ret;
> }
>
> + imx_scu_irq_register_notifier(&imx_sc_rtc_alarm_sc_notifier);
> +
> return 0;
> }
>
> --
> 2.7.4
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