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charset="utf-8" Content-Transfer-Encoding: quoted-printable Message-Id: <20250120-rtc-v1-3-08c50830bac9@nxp.com> References: <20250120-rtc-v1-0-08c50830bac9@nxp.com> In-Reply-To: <20250120-rtc-v1-0-08c50830bac9@nxp.com> To: Sudeep Holla , Cristian Marussi , Shawn Guo , Sascha Hauer , Pengutronix Kernel Team , Fabio Estevam , Alexandre Belloni Cc: arm-scmi@vger.kernel.org, linux-arm-kernel@lists.infradead.org, imx@lists.linux.dev, linux-kernel@vger.kernel.org, linux-rtc@vger.kernel.org, Peng Fan X-Mailer: b4 0.14.2 X-Developer-Signature: v=1; a=ed25519-sha256; t=1737339953; l=7539; i=peng.fan@nxp.com; s=20230812; h=from:subject:message-id; bh=bmjnxEYUzAa6HVdDVruMYsPIBr6KAocDxz9TUR0lnWI=; b=YcnuPCTqDzMStsGS4pHEqTuj1IjTom/OT/HPgxVwZkJWxo4DM3jgTfZWjdfblgP9K1VIVBN1t /NrUI4e3joICLuXCNWslFEc3vER8ti2ysxPbTUjrUj5/ysQ7YrZ+bfh X-Developer-Key: i=peng.fan@nxp.com; a=ed25519; pk=I4sJg7atIT1g63H7bb5lDRGR2gJW14RKDD0wFL8TT1g= X-ClientProxiedBy: SG2P153CA0038.APCP153.PROD.OUTLOOK.COM (2603:1096:4:c6::7) To PAXPR04MB8459.eurprd04.prod.outlook.com (2603:10a6:102:1da::15) Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-MS-Exchange-MessageSentRepresentingType: 1 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: PAXPR04MB8459:EE_|AS8PR04MB8690:EE_ X-MS-Office365-Filtering-Correlation-Id: 9d2223e8-6a5b-4404-cc02-08dd38f9dda5 X-MS-Exchange-SharedMailbox-RoutingAgent-Processed: True X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|376014|7416014|52116014|366016|1800799024|38350700014; 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Take i.MX95 for example, i.MX95 SCMI BBM Protocol supports two RTCs for i.MX95 EVK board. Using 'rtc->dev.parent' causing driver not not able to know the exact RTC device. So introduce 'priv' and devm_rtc_allocate_device_priv for driver to set rtc device private information. Signed-off-by: Peng Fan --- drivers/rtc/class.c | 9 ++++++++- drivers/rtc/dev.c | 8 +++++--- drivers/rtc/interface.c | 16 ++++++++-------- drivers/rtc/proc.c | 2 +- include/linux/rtc.h | 2 ++ 5 files changed, 24 insertions(+), 13 deletions(-) diff --git a/drivers/rtc/class.c b/drivers/rtc/class.c index e31fa0ad127e9545afac745a621d4ccbcd5fca28..67413600785d806fe4da441483c= e1280357d8791 100644 --- a/drivers/rtc/class.c +++ b/drivers/rtc/class.c @@ -361,7 +361,7 @@ static void devm_rtc_release_device(void *res) put_device(&rtc->dev); } =20 -struct rtc_device *devm_rtc_allocate_device(struct device *dev) +struct rtc_device *devm_rtc_allocate_device_priv(struct device *dev, void = *priv) { struct rtc_device *rtc; int id, err; @@ -378,6 +378,7 @@ struct rtc_device *devm_rtc_allocate_device(struct devi= ce *dev) =20 rtc->id =3D id; rtc->dev.parent =3D dev; + rtc->priv =3D priv; err =3D devm_add_action_or_reset(dev, devm_rtc_release_device, rtc); if (err) return ERR_PTR(err); @@ -388,6 +389,12 @@ struct rtc_device *devm_rtc_allocate_device(struct dev= ice *dev) =20 return rtc; } +EXPORT_SYMBOL_GPL(devm_rtc_allocate_device_priv); + +struct rtc_device *devm_rtc_allocate_device(struct device *dev) +{ + return devm_rtc_allocate_device_priv(dev, NULL); +} EXPORT_SYMBOL_GPL(devm_rtc_allocate_device); =20 int __devm_rtc_register_device(struct module *owner, struct rtc_device *rt= c) diff --git a/drivers/rtc/dev.c b/drivers/rtc/dev.c index c4a3ab53dcd4b7280a3a2981fe842729603a1feb..e0e1a488b795645d7c9453490d6= cdba510cc5db5 100644 --- a/drivers/rtc/dev.c +++ b/drivers/rtc/dev.c @@ -410,7 +410,8 @@ static long rtc_dev_ioctl(struct file *file, } default: if (rtc->ops->param_get) - err =3D rtc->ops->param_get(rtc->dev.parent, ¶m); + err =3D rtc->ops->param_get(rtc->priv ? + &rtc->dev : rtc->dev.parent, ¶m); else err =3D -EINVAL; } @@ -440,7 +441,8 @@ static long rtc_dev_ioctl(struct file *file, =20 default: if (rtc->ops->param_set) - err =3D rtc->ops->param_set(rtc->dev.parent, ¶m); + err =3D rtc->ops->param_set(rtc->priv ? + &rtc->dev : rtc->dev.parent, ¶m); else err =3D -EINVAL; } @@ -450,7 +452,7 @@ static long rtc_dev_ioctl(struct file *file, default: /* Finally try the driver's ioctl interface */ if (ops->ioctl) { - err =3D ops->ioctl(rtc->dev.parent, cmd, arg); + err =3D ops->ioctl(rtc->priv ? &rtc->dev : rtc->dev.parent, cmd, arg); if (err =3D=3D -ENOIOCTLCMD) err =3D -ENOTTY; } else { diff --git a/drivers/rtc/interface.c b/drivers/rtc/interface.c index aaf76406cd7d7d2cfd5479fc1fc892fcb5efbb6b..06d51761900ee5d6cc3916d31d9= 07505c193c6ad 100644 --- a/drivers/rtc/interface.c +++ b/drivers/rtc/interface.c @@ -91,7 +91,7 @@ static int __rtc_read_time(struct rtc_device *rtc, struct= rtc_time *tm) err =3D -EINVAL; } else { memset(tm, 0, sizeof(struct rtc_time)); - err =3D rtc->ops->read_time(rtc->dev.parent, tm); + err =3D rtc->ops->read_time(rtc->priv ? &rtc->dev : rtc->dev.parent, tm); if (err < 0) { dev_dbg(&rtc->dev, "read_time: fail to read: %d\n", err); @@ -155,7 +155,7 @@ int rtc_set_time(struct rtc_device *rtc, struct rtc_tim= e *tm) if (!rtc->ops) err =3D -ENODEV; else if (rtc->ops->set_time) - err =3D rtc->ops->set_time(rtc->dev.parent, tm); + err =3D rtc->ops->set_time(rtc->priv ? &rtc->dev : rtc->dev.parent, tm); else err =3D -EINVAL; =20 @@ -200,7 +200,7 @@ static int rtc_read_alarm_internal(struct rtc_device *r= tc, alarm->time.tm_wday =3D -1; alarm->time.tm_yday =3D -1; alarm->time.tm_isdst =3D -1; - err =3D rtc->ops->read_alarm(rtc->dev.parent, alarm); + err =3D rtc->ops->read_alarm(rtc->priv ? &rtc->dev : rtc->dev.parent, al= arm); } =20 mutex_unlock(&rtc->ops_lock); @@ -441,7 +441,7 @@ static int __rtc_set_alarm(struct rtc_device *rtc, stru= ct rtc_wkalrm *alarm) else if (!test_bit(RTC_FEATURE_ALARM, rtc->features)) err =3D -EINVAL; else - err =3D rtc->ops->set_alarm(rtc->dev.parent, alarm); + err =3D rtc->ops->set_alarm(rtc->priv ? &rtc->dev : rtc->dev.parent, ala= rm); =20 trace_rtc_set_alarm(rtc_tm_to_time64(&alarm->time), err); return err; @@ -545,7 +545,7 @@ int rtc_alarm_irq_enable(struct rtc_device *rtc, unsign= ed int enabled) else if (!test_bit(RTC_FEATURE_ALARM, rtc->features) || !rtc->ops->alarm_= irq_enable) err =3D -EINVAL; else - err =3D rtc->ops->alarm_irq_enable(rtc->dev.parent, enabled); + err =3D rtc->ops->alarm_irq_enable(rtc->priv ? &rtc->dev : rtc->dev.pare= nt, enabled); =20 mutex_unlock(&rtc->ops_lock); =20 @@ -847,7 +847,7 @@ static void rtc_alarm_disable(struct rtc_device *rtc) if (!rtc->ops || !test_bit(RTC_FEATURE_ALARM, rtc->features) || !rtc->ops= ->alarm_irq_enable) return; =20 - rtc->ops->alarm_irq_enable(rtc->dev.parent, false); + rtc->ops->alarm_irq_enable(rtc->priv ? &rtc->dev : rtc->dev.parent, false= ); trace_rtc_alarm_irq_enable(0, 0); } =20 @@ -1049,7 +1049,7 @@ int rtc_read_offset(struct rtc_device *rtc, long *off= set) return -EINVAL; =20 mutex_lock(&rtc->ops_lock); - ret =3D rtc->ops->read_offset(rtc->dev.parent, offset); + ret =3D rtc->ops->read_offset(rtc->priv ? &rtc->dev : rtc->dev.parent, of= fset); mutex_unlock(&rtc->ops_lock); =20 trace_rtc_read_offset(*offset, ret); @@ -1084,7 +1084,7 @@ int rtc_set_offset(struct rtc_device *rtc, long offse= t) return -EINVAL; =20 mutex_lock(&rtc->ops_lock); - ret =3D rtc->ops->set_offset(rtc->dev.parent, offset); + ret =3D rtc->ops->set_offset(rtc->priv ? &rtc->dev : rtc->dev.parent, off= set); mutex_unlock(&rtc->ops_lock); =20 trace_rtc_set_offset(offset, ret); diff --git a/drivers/rtc/proc.c b/drivers/rtc/proc.c index cbcdbb19d848e78e6674bd626833151a99773ef0..94cc4f9d62b7867018d876f7933= 468fbd1552ffc 100644 --- a/drivers/rtc/proc.c +++ b/drivers/rtc/proc.c @@ -73,7 +73,7 @@ static int rtc_proc_show(struct seq_file *seq, void *offs= et) seq_printf(seq, "24hr\t\t: yes\n"); =20 if (ops->proc) - ops->proc(rtc->dev.parent, seq); + ops->proc(rtc->priv ? &rtc->dev : rtc->dev.parent, seq); =20 return 0; } diff --git a/include/linux/rtc.h b/include/linux/rtc.h index 3f4d315aaec9e641e35c1c86a522f2879bec19ba..a6f3c86a08e1e214062b2a68d9a= 6a437afb186b3 100644 --- a/include/linux/rtc.h +++ b/include/linux/rtc.h @@ -110,6 +110,7 @@ struct rtc_device { struct hrtimer pie_timer; /* sub second exp, so needs hrtimer */ int pie_enabled; struct work_struct irqwork; + void *priv; =20 /* * This offset specifies the update timing of the RTC. @@ -182,6 +183,7 @@ extern struct rtc_device *devm_rtc_device_register(stru= ct device *dev, const struct rtc_class_ops *ops, struct module *owner); struct rtc_device *devm_rtc_allocate_device(struct device *dev); +struct rtc_device *devm_rtc_allocate_device_priv(struct device *dev, void = *priv); int __devm_rtc_register_device(struct module *owner, struct rtc_device *rt= c); =20 extern int rtc_read_time(struct rtc_device *rtc, struct rtc_time *tm); --=20 2.37.1