[PATCH 0/3] riscv: sophgo: add rtc support for CV1800B

[PATCH 0/3] riscv: sophgo: add rtc support for CV1800B

[Jingbao Qiu]

This series adds rtc controller support for Sophgo CV1800B.

Jingbao Qiu (3):
  dt-bindings: rtc: add binding for Sophgo CV1800B rtc controller
  rtc: add rtc controller support for Sophgo CV1800B SoC
  riscv: dts: sophgo: add rtc dt node for CV1800B

 .../bindings/rtc/sophgo,cv1800b-rtc.yaml      |  37 +++
 arch/riscv/boot/dts/sophgo/cv1800b.dtsi       |   8 +
 drivers/rtc/Kconfig                           |  10 +
 drivers/rtc/Makefile                          |   1 +
 drivers/rtc/rtc-cv1800b.c                     | 293 ++++++++++++++++++
 5 files changed, 349 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/rtc/sophgo,cv1800b-rtc.yaml
 create mode 100644 drivers/rtc/rtc-cv1800b.c

-- 
2.25.1

[PATCH 1/3] dt-bindings: rtc: add binding for Sophgo CV1800B rtc controller

[Jingbao Qiu]

Add devicetree binding for Sophgo CV1800B SoC rtc controller.

Signed-off-by: Jingbao Qiu <qiujingbao.dlmu@gmail.com>
---
 .../bindings/rtc/sophgo,cv1800b-rtc.yaml      | 37 +++++++++++++++++++
 1 file changed, 37 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/rtc/sophgo,cv1800b-rtc.yaml

diff --git a/Documentation/devicetree/bindings/rtc/sophgo,cv1800b-rtc.yaml b/Documentation/devicetree/bindings/rtc/sophgo,cv1800b-rtc.yaml
new file mode 100644
index 000000000000..fefb1e70c45c
--- /dev/null
+++ b/Documentation/devicetree/bindings/rtc/sophgo,cv1800b-rtc.yaml
@@ -0,0 +1,37 @@
+# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/rtc/sophgo,cv1800b-rtc.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Sophgo CV1800B SoC RTC Controller
+
+maintainers:
+  - Jingbao Qiu <qiujingbao.dlmu@gmail.com>
+
+properties:
+  compatible:
+    enum:
+      - sophgo,cv1800b-rtc
+  reg:
+    maxItems: 1
+
+  interrupts:
+    maxItems: 1
+
+required:
+  - compatible
+  - reg
+  - interrupts
+
+additionalProperties: false
+
+examples:
+  - |
+    rtc-controller@05026000{
+      compatible = "sophgo,cv800b-rtc";
+      reg = <0x05026000 0x1000>;
+      interrupts = <17 IRQ_TYPE_LEVEL_HIGH>;
+      interrupt-parent = <&plic0>;
+      clocks = <&osc>;
+    };
-- 
2.25.1

Re: [PATCH 1/3] dt-bindings: rtc: add binding for Sophgo CV1800B rtc controller

[Krzysztof Kozlowski]

On 21/11/2023 10:46, Jingbao Qiu wrote:
> Add devicetree binding for Sophgo CV1800B SoC rtc controller.

A nit, subject: drop second/last, redundant "binding for". The
"dt-bindings" prefix is already stating that these are bindings.

> 
> Signed-off-by: Jingbao Qiu <qiujingbao.dlmu@gmail.com>
> ---
>  .../bindings/rtc/sophgo,cv1800b-rtc.yaml      | 37 +++++++++++++++++++
>  1 file changed, 37 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/rtc/sophgo,cv1800b-rtc.yaml
> 
> diff --git a/Documentation/devicetree/bindings/rtc/sophgo,cv1800b-rtc.yaml b/Documentation/devicetree/bindings/rtc/sophgo,cv1800b-rtc.yaml
> new file mode 100644
> index 000000000000..fefb1e70c45c
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/rtc/sophgo,cv1800b-rtc.yaml
> @@ -0,0 +1,37 @@
> +# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/rtc/sophgo,cv1800b-rtc.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Sophgo CV1800B SoC RTC Controller

What is a RTC Controller? You have multiple RTCs there?

> +
> +maintainers:
> +  - Jingbao Qiu <qiujingbao.dlmu@gmail.com>
> +

Missing ref to rtc.yaml. Unless it is not applicable but then why?

> +properties:
> +  compatible:
> +    enum:
> +      - sophgo,cv1800b-rtc

Blank line

> +  reg:
> +    maxItems: 1
> +
> +  interrupts:
> +    maxItems: 1
> +
> +required:
> +  - compatible
> +  - reg
> +  - interrupts
> +
> +additionalProperties: false

unevaluatedProperties instead

> +
> +examples:
> +  - |
> +    rtc-controller@05026000{

The names is always "rtc", unless this is not RTC. If it isn't, please
add full description of the hardware.

> +      compatible = "sophgo,cv800b-rtc";
> +      reg = <0x05026000 0x1000>;
> +      interrupts = <17 IRQ_TYPE_LEVEL_HIGH>;
> +      interrupt-parent = <&plic0>;
> +      clocks = <&osc>;

Why do you send untested bindings? Review costs significant amount of
effort. Code was also not compiled? Warnings not fixed?

Best regards,
Krzysztof

Re: [PATCH 1/3] dt-bindings: rtc: add binding for Sophgo CV1800B rtc controller

[jingbao qiu]

On Tue, Nov 21, 2023 at 5:57 PM Krzysztof Kozlowski
<krzysztof.kozlowski@linaro.org> wrote:
>
> On 21/11/2023 10:46, Jingbao Qiu wrote:
> > Add devicetree binding for Sophgo CV1800B SoC rtc controller.
>
> A nit, subject: drop second/last, redundant "binding for". The
> "dt-bindings" prefix is already stating that these are bindings.

will fix.

>
> >
> > Signed-off-by: Jingbao Qiu <qiujingbao.dlmu@gmail.com>
> > ---
> >  .../bindings/rtc/sophgo,cv1800b-rtc.yaml      | 37 +++++++++++++++++++
> >  1 file changed, 37 insertions(+)
> >  create mode 100644 Documentation/devicetree/bindings/rtc/sophgo,cv1800b-rtc.yaml
> >
> > diff --git a/Documentation/devicetree/bindings/rtc/sophgo,cv1800b-rtc.yaml b/Documentation/devicetree/bindings/rtc/sophgo,cv1800b-rtc.yaml
> > new file mode 100644
> > index 000000000000..fefb1e70c45c
> > --- /dev/null
> > +++ b/Documentation/devicetree/bindings/rtc/sophgo,cv1800b-rtc.yaml
> > @@ -0,0 +1,37 @@
> > +# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
> > +%YAML 1.2
> > +---
> > +$id: http://devicetree.org/schemas/rtc/sophgo,cv1800b-rtc.yaml#
> > +$schema: http://devicetree.org/meta-schemas/core.yaml#
> > +
> > +title: Sophgo CV1800B SoC RTC Controller
>
> What is a RTC Controller? You have multiple RTCs there?
>

will drop "Controller", as I think RTC is not something like I2C, eMMC, USB,
which have the "controller <-> client/device" model.

> > +
> > +maintainers:
> > +  - Jingbao Qiu <qiujingbao.dlmu@gmail.com>
> > +
>
> Missing ref to rtc.yaml. Unless it is not applicable but then why?

ok, I should ref this file.

>
> > +properties:
> > +  compatible:
> > +    enum:
> > +      - sophgo,cv1800b-rtc
>
> Blank line

ok

>
> > +  reg:
> > +    maxItems: 1
> > +
> > +  interrupts:
> > +    maxItems: 1
> > +
> > +required:
> > +  - compatible
> > +  - reg
> > +  - interrupts
> > +
> > +additionalProperties: false
>
> unevaluatedProperties instead

will fix .

>
> > +
> > +examples:
> > +  - |
> > +    rtc-controller@05026000{
>
> The names is always "rtc", unless this is not RTC. If it isn't, please
> add full description of the hardware.

I will use "rtc" replace "rtc-controller" .

>
> > +      compatible = "sophgo,cv800b-rtc";
> > +      reg = <0x05026000 0x1000>;
> > +      interrupts = <17 IRQ_TYPE_LEVEL_HIGH>;
> > +      interrupt-parent = <&plic0>;
> > +      clocks = <&osc>;
>
> Why do you send untested bindings? Review costs significant amount of
> effort. Code was also not compiled? Warnings not fixed?

I will check it.
Leading 0 and referencing issues will be fixed.

>
> Best regards,
> Krzysztof
>

I'm sorry for taking so long to reply.
I took a few days off due to being infected with the flu.
Thank you again for your patient reply.

Best regards,
Jingbao Qiu

Re: [PATCH 1/3] dt-bindings: rtc: add binding for Sophgo CV1800B rtc controller

[Rob Herring]

On Tue, 21 Nov 2023 17:46:40 +0800, Jingbao Qiu wrote:
> Add devicetree binding for Sophgo CV1800B SoC rtc controller.
> 
> Signed-off-by: Jingbao Qiu <qiujingbao.dlmu@gmail.com>
> ---
>  .../bindings/rtc/sophgo,cv1800b-rtc.yaml      | 37 +++++++++++++++++++
>  1 file changed, 37 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/rtc/sophgo,cv1800b-rtc.yaml
> 

My bot found errors running 'make DT_CHECKER_FLAGS=-m dt_binding_check'
on your patch (DT_CHECKER_FLAGS is new in v5.13):

yamllint warnings/errors:

dtschema/dtc warnings/errors:
Error: Documentation/devicetree/bindings/rtc/sophgo,cv1800b-rtc.example.dts:27.28-29 syntax error
FATAL ERROR: Unable to parse input tree
make[2]: *** [scripts/Makefile.lib:419: Documentation/devicetree/bindings/rtc/sophgo,cv1800b-rtc.example.dtb] Error 1
make[2]: *** Waiting for unfinished jobs....
make[1]: *** [/builds/robherring/dt-review-ci/linux/Makefile:1424: dt_binding_check] Error 2
make: *** [Makefile:234: __sub-make] Error 2

doc reference errors (make refcheckdocs):

See https://patchwork.ozlabs.org/project/devicetree-bindings/patch/20231121094642.2973795-2-qiujingbao.dlmu@gmail.com

The base for the series is generally the latest rc1. A different dependency
should be noted in *this* patch.

If you already ran 'make dt_binding_check' and didn't see the above
error(s), then make sure 'yamllint' is installed and dt-schema is up to
date:

pip3 install dtschema --upgrade

Please check and re-submit after running the above command yourself. Note
that DT_SCHEMA_FILES can be set to your schema file to speed up checking
your schema. However, it must be unset to test all examples with your schema.

[PATCH 2/3] rtc: add rtc controller support for Sophgo CV1800B SoC

[Jingbao Qiu]

Implement the RTC driver for CV1800B, which able to provide time and
alarm functionality.

Signed-off-by: Jingbao Qiu <qiujingbao.dlmu@gmail.com>
---
 drivers/rtc/Kconfig       |  10 ++
 drivers/rtc/Makefile      |   1 +
 drivers/rtc/rtc-cv1800b.c | 293 ++++++++++++++++++++++++++++++++++++++
 3 files changed, 304 insertions(+)
 create mode 100644 drivers/rtc/rtc-cv1800b.c

diff --git a/drivers/rtc/Kconfig b/drivers/rtc/Kconfig
index 3814e0845e77..2089cceea38c 100644
--- a/drivers/rtc/Kconfig
+++ b/drivers/rtc/Kconfig
@@ -1103,6 +1103,16 @@ config RTC_DRV_DS2404
 	  This driver can also be built as a module. If so, the module
 	  will be called rtc-ds2404.
 
+config RTC_DRV_CV1800B
+	tristate "Sophgo CV1800B RTC"
+	depends on ARCH_SOPHGO || COMPILE_TEST
+	help
+	  If you say yes here you will get support for the
+	  RTC of the Sophgo CV1800B SOC.
+
+	  This depend on ARCH_SOPHGO and COMPILE_TEST. Please
+	  first config that.
+
 config RTC_DRV_DA9052
 	tristate "Dialog DA9052/DA9053 RTC"
 	depends on PMIC_DA9052
diff --git a/drivers/rtc/Makefile b/drivers/rtc/Makefile
index 7b03c3abfd78..3717d7ec8a4e 100644
--- a/drivers/rtc/Makefile
+++ b/drivers/rtc/Makefile
@@ -42,6 +42,7 @@ obj-$(CONFIG_RTC_DRV_CADENCE)	+= rtc-cadence.o
 obj-$(CONFIG_RTC_DRV_CMOS)	+= rtc-cmos.o
 obj-$(CONFIG_RTC_DRV_CPCAP)	+= rtc-cpcap.o
 obj-$(CONFIG_RTC_DRV_CROS_EC)	+= rtc-cros-ec.o
+obj-$(CONFIG_RTC_DRV_CV1800B)	+= rtc-cv1800b.o
 obj-$(CONFIG_RTC_DRV_DA9052)	+= rtc-da9052.o
 obj-$(CONFIG_RTC_DRV_DA9055)	+= rtc-da9055.o
 obj-$(CONFIG_RTC_DRV_DA9063)	+= rtc-da9063.o
diff --git a/drivers/rtc/rtc-cv1800b.c b/drivers/rtc/rtc-cv1800b.c
new file mode 100644
index 000000000000..d56132de30bb
--- /dev/null
+++ b/drivers/rtc/rtc-cv1800b.c
@@ -0,0 +1,293 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * rtc-cv1800b.c: RTC driver for Sophgo CV1800B RTC
+ *
+ * Author: Jingbao Qiu <qiujingbao.dlmu@gmail.com>
+ */
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/platform_device.h>
+#include <linux/rtc.h>
+#include <linux/clk.h>
+#include <linux/delay.h>
+
+#define RTC_ANA_CALIB                 0x000
+#define RTC_SEC_PULSE_GEN             0x004
+#define RTC_ALARM_TIME                0x008
+#define RTC_ALARM_ENABLE              0x00c
+#define RTC_SET_SEC_CNTR_VALUE        0x010
+#define RTC_SET_SEC_CNTR_TRIG         0x014
+#define RTC_SEC_CNTR_VALUE            0x018
+#define RTC_INFO0                     0x01c
+#define RTC_INFO1                     0x020
+#define RTC_INFO2                     0x024
+#define RTC_INFO3                     0x028
+#define RTC_NOPOR_INFO0               0x02c
+#define RTC_NOPOR_INFO1               0x030
+#define RTC_NOPOR_INFO2               0x034
+#define RTC_NOPOR_INFO3               0x038
+#define RTC_DB_PWR_VBAT_DET           0x040
+#define RTC_DB_BUTTON1                0x048
+#define RTC_DB_PWR_ON                 0x04c
+#define RTC_7SEC_RESET                0x050
+#define RTC_THM_SHDN_AUTO_REBOOT      0x064
+#define RTC_POR_DB_MAGIC_KEY          0x068
+#define RTC_DB_SEL_PWR                0x06c
+#define RTC_UP_SEQ0                   0x070
+#define RTC_UP_SEQ1                   0x074
+#define RTC_UP_SEQ2                   0x078
+#define RTC_UP_SEQ3                   0x07c
+#define RTC_UP_IF_EN                  0x080
+#define RTC_UP_RSTN                   0x084
+#define RTC_UP_MAX                    0x088
+#define RTC_DN_SEQ0                   0x090
+#define RTC_DN_SEQ1                   0x094
+#define RTC_DN_SEQ2                   0x098
+#define RTC_DN_SEQ3                   0x09c
+#define RTC_DN_IF_EN                  0x0a0
+#define RTC_DN_RSTN                   0x0a4
+#define RTC_DN_MAX                    0x0a8
+#define RTC_PWR_CYC_MAX               0x0b0
+#define RTC_WARM_RST_MAX              0x0b4
+#define RTC_EN_7SEC_RST               0x0b8
+#define RTC_EN_PWR_WAKEUP             0x0bc
+#define RTC_EN_SHDN_REQ               0x0c0
+#define RTC_EN_THM_SHDN               0x0c4
+#define RTC_EN_PWR_CYC_REQ            0x0c8
+#define RTC_EN_WARM_RST_REQ           0x0cc
+#define RTC_EN_PWR_VBAT_DET           0x0d0
+#define FSM_STATE                     0x0d4
+#define RTC_EN_WDG_RST_REQ            0x0e0
+#define RTC_EN_SUSPEND_REQ            0x0e4
+#define RTC_DB_REQ_WDG_RST            0x0e8
+#define RTC_DB_REQ_SUSPEND            0x0ec
+#define RTC_PG_REG                    0x0f0
+#define RTC_ST_ON_REASON              0x0f8
+#define RTC_ST_OFF_REASON             0x0fc
+#define RTC_EN_WAKEUP_REQ             0x120
+#define RTC_PWR_WAKEUP_POLARITY       0x128
+#define RTC_DB_SEL_REQ                0x130
+#define RTC_PWR_DET_SEL               0x140
+
+#define REG_DISABLE_FUN               0x00UL
+#define REG_ENABLE_FUN                BIT(0)
+#define ACTIVATE_RTC_POR_DB_MAGIC_KEY 0x5af0
+#define INIT_LOAD_TIME                0xff
+
+struct cv1800b_rtc_priv {
+	struct rtc_device *rtc_dev;
+	void __iomem *core_map;
+	struct clk *clk;
+	int irq;
+};
+
+static int cv1800b_rtc_alarm_irq_enable(struct device *dev,
+					unsigned int enabled)
+{
+	struct cv1800b_rtc_priv *data = dev_get_drvdata(dev);
+
+	if (enabled)
+		writel_relaxed(REG_ENABLE_FUN, data->core_map + RTC_ALARM_ENABLE);
+	else
+		writel_relaxed(REG_DISABLE_FUN,
+			       data->core_map + RTC_ALARM_ENABLE);
+
+	return 0;
+}
+
+static int cv1800b_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alrm)
+{
+	struct cv1800b_rtc_priv *data = dev_get_drvdata(dev);
+	unsigned long time = rtc_tm_to_time64(&alrm->time);
+
+	writel_relaxed(time, data->core_map + RTC_ALARM_TIME);
+
+	cv1800b_rtc_alarm_irq_enable(dev, 1);
+
+	return 0;
+}
+
+static int cv1800b_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alrm)
+{
+	u32 alrm_time, now_time;
+	struct cv1800b_rtc_priv *data = dev_get_drvdata(dev);
+
+	alrm_time = readl(data->core_map + RTC_ALARM_TIME);
+	now_time = readl(data->core_map + RTC_SEC_CNTR_VALUE);
+	rtc_time64_to_tm(alrm_time, &alrm->time);
+	alrm->pending = now_time > alrm_time ? 1 : 0;
+	alrm->enabled = readl(data->core_map + RTC_ALARM_ENABLE);
+
+	return 0;
+}
+
+static int cv1800b_rtc_softinit(struct cv1800b_rtc_priv *dev)
+{
+	u32 timeout = 20;
+
+	writel(ACTIVATE_RTC_POR_DB_MAGIC_KEY,
+	       dev->core_map + RTC_POR_DB_MAGIC_KEY);
+	writel(INIT_LOAD_TIME, dev->core_map + RTC_SET_SEC_CNTR_VALUE);
+	writel(REG_DISABLE_FUN, dev->core_map + RTC_SET_SEC_CNTR_TRIG);
+
+	while (readl(dev->core_map + RTC_SEC_CNTR_VALUE) == INIT_LOAD_TIME
+	       && timeout--)
+		udelay(5);
+
+	if (!timeout)
+		return -1;
+	return 0;
+}
+
+static int cv1800b_rtc_read_time(struct device *dev, struct rtc_time *tm)
+{
+	struct cv1800b_rtc_priv *data = dev_get_drvdata(dev);
+	u32 time = 0;
+
+	if (!data)
+		return -1;
+
+	time = readl_relaxed(data->core_map + RTC_SEC_CNTR_VALUE);
+	rtc_time64_to_tm(time, tm);
+
+	return 0;
+}
+
+static int cv1800b_rtc_set_time(struct device *dev, struct rtc_time *tm)
+{
+	unsigned long time = rtc_tm_to_time64(tm);
+	struct cv1800b_rtc_priv *data = dev_get_drvdata(dev);
+
+	if (!data)
+		return -1;
+
+	writel(time, data->core_map + RTC_SET_SEC_CNTR_VALUE);
+	writel(REG_ENABLE_FUN, data->core_map + RTC_SET_SEC_CNTR_TRIG);
+
+	return 0;
+}
+
+static irqreturn_t cv1800b_rtc_irq_handler(int irq, void *dev_id)
+{
+	struct device *dev = dev_id;
+	struct cv1800b_rtc_priv *data = dev_get_drvdata(dev);
+
+	if (!data)
+		return -1;
+	writel(REG_DISABLE_FUN, data->core_map + RTC_ALARM_ENABLE);
+
+	return IRQ_HANDLED;
+}
+
+static const struct rtc_class_ops cv800b_rtc_ops = {
+	.read_time = cv1800b_rtc_read_time,
+	.set_time = cv1800b_rtc_set_time,
+	.read_alarm = cv1800b_rtc_read_alarm,
+	.set_alarm = cv1800b_rtc_set_alarm,
+	.alarm_irq_enable = cv1800b_rtc_alarm_irq_enable,
+};
+
+static int cv1800b_rtc_probe(struct platform_device *pdev)
+{
+	struct cv1800b_rtc_priv *rtc;
+	struct resource *res;
+	int ret;
+
+	rtc = devm_kzalloc(&pdev->dev, sizeof(*rtc), GFP_KERNEL);
+	if (!rtc)
+		return -ENOMEM;
+
+	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	if (!res) {
+		ret = -ENODEV;
+		goto err;
+	}
+
+	rtc->core_map = devm_ioremap_resource(&pdev->dev, res);
+	if (IS_ERR(rtc->core_map)) {
+		ret = PTR_ERR(rtc->core_map);
+		goto err;
+	}
+
+	rtc->irq = platform_get_irq(pdev, 0);
+	platform_set_drvdata(pdev, rtc);
+	if (rtc->irq < 0) {
+		ret = -EINVAL;
+		goto err;
+	}
+
+	ret =
+	    devm_request_irq(&pdev->dev, rtc->irq, cv1800b_rtc_irq_handler,
+			     IRQF_SHARED, "rtc alarm", &pdev->dev);
+	if (ret)
+		goto err;
+
+	rtc->clk = devm_clk_get(&pdev->dev, NULL);
+	if (IS_ERR(rtc->clk)) {
+		dev_err(&pdev->dev, "no clock");
+		ret = PTR_ERR(rtc->clk);
+		goto err;
+	}
+	ret = clk_prepare_enable(rtc->clk);
+	if (ret)
+		goto err;
+	ret = cv1800b_rtc_softinit(rtc);
+	if (ret)
+		goto err;
+	cv1800b_rtc_alarm_irq_enable(&pdev->dev, 1);
+	rtc->rtc_dev = devm_rtc_allocate_device(&pdev->dev);
+	if (IS_ERR(rtc->rtc_dev)) {
+		ret = PTR_ERR(rtc->rtc_dev);
+		goto err;
+	}
+	rtc->rtc_dev->range_max = U32_MAX;
+	rtc->rtc_dev->ops = &cv800b_rtc_ops;
+
+	return rtc_register_device(rtc->rtc_dev);
+err:
+	return dev_err_probe(&pdev->dev, ret, "Failed to init cv1800b rtc\n");
+}
+
+static int __maybe_unused cv1800b_rtc_suspend_noirq(struct device *dev)
+{
+	struct cv1800b_rtc_priv *data = dev_get_drvdata(dev);
+
+	clk_disable_unprepare(data->clk);
+
+	return 0;
+}
+
+static int __maybe_unused cv1800b_rtc_resume_noirq(struct device *dev)
+{
+	struct cv1800b_rtc_priv *data = dev_get_drvdata(dev);
+
+	clk_prepare_enable(data->clk);
+
+	return 0;
+}
+
+static const struct dev_pm_ops cv1800b_rtc_pm_ops = {
+	SET_NOIRQ_SYSTEM_SLEEP_PM_OPS(cv1800b_rtc_suspend_noirq,
+				      cv1800b_rtc_resume_noirq)
+};
+
+static const struct of_device_id cv1800b_dt_ids[] = {
+	{ .compatible = "sophgo,cv800b-rtc" },
+	{ /* sentinel */ }
+};
+
+MODULE_DEVICE_TABLE(of, cv1800b_dt_ids);
+
+static struct platform_driver cv1800b_rtc_driver = {
+	.driver = {
+		   .name = "sophgo-cv800b-rtc",
+		   .pm = &cv1800b_rtc_pm_ops,
+		   .of_match_table = cv1800b_dt_ids,
+		    },
+	.probe = cv1800b_rtc_probe,
+};
+
+module_platform_driver(cv1800b_rtc_driver);
+MODULE_AUTHOR("Jingbao Qiu");
+MODULE_DESCRIPTION("Sophgo CV1800B RTC Driver");
+MODULE_LICENSE("GPL");
-- 
2.25.1

Re: [PATCH 2/3] rtc: add rtc controller support for Sophgo CV1800B SoC

[Krzysztof Kozlowski]

On 21/11/2023 10:46, Jingbao Qiu wrote:
> Implement the RTC driver for CV1800B, which able to provide time and
> alarm functionality.
> 
> Signed-off-by: Jingbao Qiu <qiujingbao.dlmu@gmail.com>
> ---
>  drivers/rtc/Kconfig       |  10 ++
>  drivers/rtc/Makefile      |   1 +
>  drivers/rtc/rtc-cv1800b.c | 293 ++++++++++++++++++++++++++++++++++++++
>  3 files changed, 304 insertions(+)
>  create mode 100644 drivers/rtc/rtc-cv1800b.c

Bindings were not tested, so I assume you did not compile the code
either. Please confirm that you fixed all warnings pointed out by W=1
builds, smatch and sparse. All of them.

> 
> diff --git a/drivers/rtc/Kconfig b/drivers/rtc/Kconfig
> index 3814e0845e77..2089cceea38c 100644
> --- a/drivers/rtc/Kconfig
> +++ b/drivers/rtc/Kconfig
> @@ -1103,6 +1103,16 @@ config RTC_DRV_DS2404
>  	  This driver can also be built as a module. If so, the module
>  	  will be called rtc-ds2404.
>  
> +config RTC_DRV_CV1800B
> +	tristate "Sophgo CV1800B RTC"
> +	depends on ARCH_SOPHGO || COMPILE_TEST
> +	help
> +	  If you say yes here you will get support for the
> +	  RTC of the Sophgo CV1800B SOC.
> +
> +	  This depend on ARCH_SOPHGO and COMPILE_TEST. Please
> +	  first config that.

...

> +static int cv1800b_rtc_probe(struct platform_device *pdev)
> +{
> +	struct cv1800b_rtc_priv *rtc;
> +	struct resource *res;
> +	int ret;
> +
> +	rtc = devm_kzalloc(&pdev->dev, sizeof(*rtc), GFP_KERNEL);
> +	if (!rtc)
> +		return -ENOMEM;
> +
> +	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
> +	if (!res) {
> +		ret = -ENODEV;
> +		goto err;
> +	}
> +
> +	rtc->core_map = devm_ioremap_resource(&pdev->dev, res);

Use helper combining these two calls.

> +	if (IS_ERR(rtc->core_map)) {
> +		ret = PTR_ERR(rtc->core_map);
> +		goto err;
> +	}
> +
> +	rtc->irq = platform_get_irq(pdev, 0);
> +	platform_set_drvdata(pdev, rtc);

Your code has random order. First you get IRQ, then you check its value,
then you go further.

> +	if (rtc->irq < 0) {
> +		ret = -EINVAL;
> +		goto err;
> +	}
> +
> +	ret =
> +	    devm_request_irq(&pdev->dev, rtc->irq, cv1800b_rtc_irq_handler,

Wrong wrapping.

> +			     IRQF_SHARED, "rtc alarm", &pdev->dev);

Why shared?

> +	if (ret)
> +		goto err;
> +
> +	rtc->clk = devm_clk_get(&pdev->dev, NULL);
> +	if (IS_ERR(rtc->clk)) {
> +		dev_err(&pdev->dev, "no clock");

This code is not ready for upstream. There are multiple things wrong here.

First, syntax is return dev_err_probe.

Second, you do not have clocks and you do not allow them! Just open your
binding.

Third, use wrapper - devm_clk_get_enable or something like that.


> +		ret = PTR_ERR(rtc->clk);
> +		goto err;
> +	}

Blank line.

> +	ret = clk_prepare_enable(rtc->clk);
> +	if (ret)
> +		goto err;

Blank line.

> +	ret = cv1800b_rtc_softinit(rtc);
> +	if (ret)
> +		goto err;
> +	cv1800b_rtc_alarm_irq_enable(&pdev->dev, 1);
> +	rtc->rtc_dev = devm_rtc_allocate_device(&pdev->dev);
> +	if (IS_ERR(rtc->rtc_dev)) {
> +		ret = PTR_ERR(rtc->rtc_dev);
> +		goto err;
> +	}
> +	rtc->rtc_dev->range_max = U32_MAX;
> +	rtc->rtc_dev->ops = &cv800b_rtc_ops;
> +
> +	return rtc_register_device(rtc->rtc_dev);
> +err:
> +	return dev_err_probe(&pdev->dev, ret, "Failed to init cv1800b rtc\n");

Drop, just return.

Best regards,
Krzysztof

Re: [PATCH 2/3] rtc: add rtc controller support for Sophgo CV1800B SoC

[jingbao qiu]

On Tue, Nov 21, 2023 at 6:01 PM Krzysztof Kozlowski
<krzysztof.kozlowski@linaro.org> wrote:
>
> On 21/11/2023 10:46, Jingbao Qiu wrote:
> > Implement the RTC driver for CV1800B, which able to provide time and
> > alarm functionality.
> >
> > Signed-off-by: Jingbao Qiu <qiujingbao.dlmu@gmail.com>
> > ---
> >  drivers/rtc/Kconfig       |  10 ++
> >  drivers/rtc/Makefile      |   1 +
> >  drivers/rtc/rtc-cv1800b.c | 293 ++++++++++++++++++++++++++++++++++++++
> >  3 files changed, 304 insertions(+)
> >  create mode 100644 drivers/rtc/rtc-cv1800b.c
>
> Bindings were not tested, so I assume you did not compile the code
> either. Please confirm that you fixed all warnings pointed out by W=1
> builds, smatch and sparse. All of them.

 will test & fix in next version

>
> >
> > diff --git a/drivers/rtc/Kconfig b/drivers/rtc/Kconfig
> > index 3814e0845e77..2089cceea38c 100644
> > --- a/drivers/rtc/Kconfig
> > +++ b/drivers/rtc/Kconfig
> > @@ -1103,6 +1103,16 @@ config RTC_DRV_DS2404
> >         This driver can also be built as a module. If so, the module
> >         will be called rtc-ds2404.
> >
> > +config RTC_DRV_CV1800B
> > +     tristate "Sophgo CV1800B RTC"
> > +     depends on ARCH_SOPHGO || COMPILE_TEST
> > +     help
> > +       If you say yes here you will get support for the
> > +       RTC of the Sophgo CV1800B SOC.
> > +
> > +       This depend on ARCH_SOPHGO and COMPILE_TEST. Please
> > +       first config that.
>
> ...
>
> > +static int cv1800b_rtc_probe(struct platform_device *pdev)
> > +{
> > +     struct cv1800b_rtc_priv *rtc;
> > +     struct resource *res;
> > +     int ret;
> > +
> > +     rtc = devm_kzalloc(&pdev->dev, sizeof(*rtc), GFP_KERNEL);
> > +     if (!rtc)
> > +             return -ENOMEM;
> > +
> > +     res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
> > +     if (!res) {
> > +             ret = -ENODEV;
> > +             goto err;
> > +     }
> > +
> > +     rtc->core_map = devm_ioremap_resource(&pdev->dev, res);
>
> Use helper combining these two calls.

Ok, will use devm_platform_ioremap_resource() to replace it.

>
> > +     if (IS_ERR(rtc->core_map)) {
> > +             ret = PTR_ERR(rtc->core_map);
> > +             goto err;
> > +     }
> > +
> > +     rtc->irq = platform_get_irq(pdev, 0);
> > +     platform_set_drvdata(pdev, rtc);
>
> Your code has random order. First you get IRQ, then you check its value,
> then you go further.

ok

>
> > +     if (rtc->irq < 0) {
> > +             ret = -EINVAL;
> > +             goto err;
> > +     }
> > +
> > +     ret =
> > +         devm_request_irq(&pdev->dev, rtc->irq, cv1800b_rtc_irq_handler,
>
> Wrong wrapping.

ok

>
> > +                          IRQF_SHARED, "rtc alarm", &pdev->dev);
>
> Why shared?

ok

>
> > +     if (ret)
> > +             goto err;
> > +
> > +     rtc->clk = devm_clk_get(&pdev->dev, NULL);
> > +     if (IS_ERR(rtc->clk)) {
> > +             dev_err(&pdev->dev, "no clock");
>
> This code is not ready for upstream. There are multiple things wrong here.
>
> First, syntax is return dev_err_probe.
>
> Second, you do not have clocks and you do not allow them! Just open your
> binding.

I'm not fully understanding here, can you elaborate more?
as there is clocks info like this in the dt-bindings:
 clocks = <&osc>;

>
> Third, use wrapper - devm_clk_get_enable or something like that.

I will use devm_clk_get_enabled() to replace it.

>
>
> > +             ret = PTR_ERR(rtc->clk);
> > +             goto err;
> > +     }
>
> Blank line.

ok

>
> > +     ret = clk_prepare_enable(rtc->clk);
> > +     if (ret)
> > +             goto err;
>
> Blank line.

ok

>
> > +     ret = cv1800b_rtc_softinit(rtc);
> > +     if (ret)
> > +             goto err;
> > +     cv1800b_rtc_alarm_irq_enable(&pdev->dev, 1);
> > +     rtc->rtc_dev = devm_rtc_allocate_device(&pdev->dev);
> > +     if (IS_ERR(rtc->rtc_dev)) {
> > +             ret = PTR_ERR(rtc->rtc_dev);
> > +             goto err;
> > +     }
> > +     rtc->rtc_dev->range_max = U32_MAX;
> > +     rtc->rtc_dev->ops = &cv800b_rtc_ops;
> > +
> > +     return rtc_register_device(rtc->rtc_dev);

I find the commet of devm_rtc_device_register wirte
“This function is deprecated, use devm_rtc_allocate_device and
rtc_register_device instead”
but all of code about this, they all use devm_rtc_device_register
function. So which one do you suggest I use?

> > +err:
> > +     return dev_err_probe(&pdev->dev, ret, "Failed to init cv1800b rtc\n");
>
> Drop, just return.

ok

>
> Best regards,
> Krzysztof
>

Best regards,
Jingbao Qiu

Re: [PATCH 2/3] rtc: add rtc controller support for Sophgo CV1800B SoC

[Krzysztof Kozlowski]

On 28/11/2023 14:22, jingbao qiu wrote:
>>> +     if (ret)
>>> +             goto err;
>>> +
>>> +     rtc->clk = devm_clk_get(&pdev->dev, NULL);
>>> +     if (IS_ERR(rtc->clk)) {
>>> +             dev_err(&pdev->dev, "no clock");
>>
>> This code is not ready for upstream. There are multiple things wrong here.
>>
>> First, syntax is return dev_err_probe.
>>
>> Second, you do not have clocks and you do not allow them! Just open your
>> binding.
> 
> I'm not fully understanding here, can you elaborate more?

That the syntax is dev_err_probe() or that you do not have clocks?


> as there is clocks info like this in the dt-bindings:
>  clocks = <&osc>;

Really?

Point me to the line in your patch:

+properties:
+  compatible:
+    enum:
+      - sophgo,cv1800b-rtc
+  reg:
+    maxItems: 1
+
+  interrupts:
+    maxItems: 1
+
+required:
+  - compatible
+  - reg
+  - interrupts

Where are the clocks?


Best regards,
Krzysztof

Re: [PATCH 2/3] rtc: add rtc controller support for Sophgo CV1800B SoC

[jingbao qiu]

On Tue, Nov 28, 2023 at 9:59 PM Krzysztof Kozlowski
<krzysztof.kozlowski@linaro.org> wrote:
>
> On 28/11/2023 14:22, jingbao qiu wrote:
> >>> +     if (ret)
> >>> +             goto err;
> >>> +
> >>> +     rtc->clk = devm_clk_get(&pdev->dev, NULL);
> >>> +     if (IS_ERR(rtc->clk)) {
> >>> +             dev_err(&pdev->dev, "no clock");
> >>
> >> This code is not ready for upstream. There are multiple things wrong here.
> >>
> >> First, syntax is return dev_err_probe.
> >>
> >> Second, you do not have clocks and you do not allow them! Just open your
> >> binding.
> >
> > I'm not fully understanding here, can you elaborate more?
>
> That the syntax is dev_err_probe() or that you do not have clocks?
>
>
> > as there is clocks info like this in the dt-bindings:
> >  clocks = <&osc>;
>
> Really?
>
> Point me to the line in your patch:
>
> +properties:
> +  compatible:
> +    enum:
> +      - sophgo,cv1800b-rtc
> +  reg:
> +    maxItems: 1
> +
> +  interrupts:
> +    maxItems: 1
> +
> +required:
> +  - compatible
> +  - reg
> +  - interrupts
>
> Where are the clocks?

I will fix properties.

>
>
> Best regards,
> Krzysztof
>

Best regards,
Jingbao Qiu

Re: [PATCH 2/3] rtc: add rtc controller support for Sophgo CV1800B SoC

[Alexandre Belloni]

On 28/11/2023 21:22:52+0800, jingbao qiu wrote:
> >
> > > +     ret = cv1800b_rtc_softinit(rtc);
> > > +     if (ret)
> > > +             goto err;
> > > +     cv1800b_rtc_alarm_irq_enable(&pdev->dev, 1);
> > > +     rtc->rtc_dev = devm_rtc_allocate_device(&pdev->dev);
> > > +     if (IS_ERR(rtc->rtc_dev)) {
> > > +             ret = PTR_ERR(rtc->rtc_dev);
> > > +             goto err;
> > > +     }
> > > +     rtc->rtc_dev->range_max = U32_MAX;
> > > +     rtc->rtc_dev->ops = &cv800b_rtc_ops;
> > > +
> > > +     return rtc_register_device(rtc->rtc_dev);
> 
> I find the commet of devm_rtc_device_register wirte
> “This function is deprecated, use devm_rtc_allocate_device and
> rtc_register_device instead”
> but all of code about this, they all use devm_rtc_device_register

They don't, they use devm_rtc_register_device

> function. So which one do you suggest I use?
> 
> > > +err:
> > > +     return dev_err_probe(&pdev->dev, ret, "Failed to init cv1800b rtc\n");
> >
> > Drop, just return.
> 
> ok
> 
> >
> > Best regards,
> > Krzysztof
> >
> 
> Best regards,
> Jingbao Qiu

-- 
Alexandre Belloni, co-owner and COO, Bootlin
Embedded Linux and Kernel engineering
https://bootlin.com

Re: [PATCH 2/3] rtc: add rtc controller support for Sophgo CV1800B SoC

[kernel test robot]

Hi Jingbao,

kernel test robot noticed the following build errors:

[auto build test ERROR on abelloni/rtc-next]
[also build test ERROR on linus/master v6.7-rc2 next-20231121]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch#_base_tree_information]

url:    https://github.com/intel-lab-lkp/linux/commits/Jingbao-Qiu/dt-bindings-rtc-add-binding-for-Sophgo-CV1800B-rtc-controller/20231121-174927
base:   https://git.kernel.org/pub/scm/linux/kernel/git/abelloni/linux.git rtc-next
patch link:    https://lore.kernel.org/r/20231121094642.2973795-3-qiujingbao.dlmu%40gmail.com
patch subject: [PATCH 2/3] rtc: add rtc controller support for Sophgo CV1800B SoC
config: parisc-allmodconfig (https://download.01.org/0day-ci/archive/20231122/202311220129.aOYelwJQ-lkp@intel.com/config)
compiler: hppa-linux-gcc (GCC) 13.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20231122/202311220129.aOYelwJQ-lkp@intel.com/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202311220129.aOYelwJQ-lkp@intel.com/

All errors (new ones prefixed by >>):

   drivers/rtc/rtc-cv1800b.c: In function 'cv1800b_rtc_probe':
>> drivers/rtc/rtc-cv1800b.c:246:16: error: implicit declaration of function 'rtc_register_device'; did you mean 'devm_rtc_register_device'? [-Werror=implicit-function-declaration]
     246 |         return rtc_register_device(rtc->rtc_dev);
         |                ^~~~~~~~~~~~~~~~~~~
         |                devm_rtc_register_device
   cc1: some warnings being treated as errors


vim +246 drivers/rtc/rtc-cv1800b.c

   189	
   190	static int cv1800b_rtc_probe(struct platform_device *pdev)
   191	{
   192		struct cv1800b_rtc_priv *rtc;
   193		struct resource *res;
   194		int ret;
   195	
   196		rtc = devm_kzalloc(&pdev->dev, sizeof(*rtc), GFP_KERNEL);
   197		if (!rtc)
   198			return -ENOMEM;
   199	
   200		res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
   201		if (!res) {
   202			ret = -ENODEV;
   203			goto err;
   204		}
   205	
   206		rtc->core_map = devm_ioremap_resource(&pdev->dev, res);
   207		if (IS_ERR(rtc->core_map)) {
   208			ret = PTR_ERR(rtc->core_map);
   209			goto err;
   210		}
   211	
   212		rtc->irq = platform_get_irq(pdev, 0);
   213		platform_set_drvdata(pdev, rtc);
   214		if (rtc->irq < 0) {
   215			ret = -EINVAL;
   216			goto err;
   217		}
   218	
   219		ret =
   220		    devm_request_irq(&pdev->dev, rtc->irq, cv1800b_rtc_irq_handler,
   221				     IRQF_SHARED, "rtc alarm", &pdev->dev);
   222		if (ret)
   223			goto err;
   224	
   225		rtc->clk = devm_clk_get(&pdev->dev, NULL);
   226		if (IS_ERR(rtc->clk)) {
   227			dev_err(&pdev->dev, "no clock");
   228			ret = PTR_ERR(rtc->clk);
   229			goto err;
   230		}
   231		ret = clk_prepare_enable(rtc->clk);
   232		if (ret)
   233			goto err;
   234		ret = cv1800b_rtc_softinit(rtc);
   235		if (ret)
   236			goto err;
   237		cv1800b_rtc_alarm_irq_enable(&pdev->dev, 1);
   238		rtc->rtc_dev = devm_rtc_allocate_device(&pdev->dev);
   239		if (IS_ERR(rtc->rtc_dev)) {
   240			ret = PTR_ERR(rtc->rtc_dev);
   241			goto err;
   242		}
   243		rtc->rtc_dev->range_max = U32_MAX;
   244		rtc->rtc_dev->ops = &cv800b_rtc_ops;
   245	
 > 246		return rtc_register_device(rtc->rtc_dev);
   247	err:
   248		return dev_err_probe(&pdev->dev, ret, "Failed to init cv1800b rtc\n");
   249	}
   250	

-- 
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki

Re: [PATCH 2/3] rtc: add rtc controller support for Sophgo CV1800B SoC

[kernel test robot]

Hi Jingbao,

kernel test robot noticed the following build errors:

[auto build test ERROR on abelloni/rtc-next]
[also build test ERROR on linus/master v6.7-rc2 next-20231121]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch#_base_tree_information]

url:    https://github.com/intel-lab-lkp/linux/commits/Jingbao-Qiu/dt-bindings-rtc-add-binding-for-Sophgo-CV1800B-rtc-controller/20231121-174927
base:   https://git.kernel.org/pub/scm/linux/kernel/git/abelloni/linux.git rtc-next
patch link:    https://lore.kernel.org/r/20231121094642.2973795-3-qiujingbao.dlmu%40gmail.com
patch subject: [PATCH 2/3] rtc: add rtc controller support for Sophgo CV1800B SoC
config: sparc-allmodconfig (https://download.01.org/0day-ci/archive/20231122/202311220645.2hOquYn6-lkp@intel.com/config)
compiler: sparc64-linux-gcc (GCC) 13.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20231122/202311220645.2hOquYn6-lkp@intel.com/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202311220645.2hOquYn6-lkp@intel.com/

All errors (new ones prefixed by >>):

   drivers/rtc/rtc-cv1800b.c: In function 'cv1800b_rtc_alarm_irq_enable':
>> drivers/rtc/rtc-cv1800b.c:90:17: error: implicit declaration of function 'writel_relaxed' [-Werror=implicit-function-declaration]
      90 |                 writel_relaxed(REG_ENABLE_FUN, data->core_map + RTC_ALARM_ENABLE);
         |                 ^~~~~~~~~~~~~~
   drivers/rtc/rtc-cv1800b.c: In function 'cv1800b_rtc_read_alarm':
>> drivers/rtc/rtc-cv1800b.c:115:21: error: implicit declaration of function 'readl' [-Werror=implicit-function-declaration]
     115 |         alrm_time = readl(data->core_map + RTC_ALARM_TIME);
         |                     ^~~~~
   drivers/rtc/rtc-cv1800b.c: In function 'cv1800b_rtc_softinit':
>> drivers/rtc/rtc-cv1800b.c:128:9: error: implicit declaration of function 'writel' [-Werror=implicit-function-declaration]
     128 |         writel(ACTIVATE_RTC_POR_DB_MAGIC_KEY,
         |         ^~~~~~
   drivers/rtc/rtc-cv1800b.c: In function 'cv1800b_rtc_read_time':
>> drivers/rtc/rtc-cv1800b.c:150:16: error: implicit declaration of function 'readl_relaxed' [-Werror=implicit-function-declaration]
     150 |         time = readl_relaxed(data->core_map + RTC_SEC_CNTR_VALUE);
         |                ^~~~~~~~~~~~~
   drivers/rtc/rtc-cv1800b.c: In function 'cv1800b_rtc_probe':
   drivers/rtc/rtc-cv1800b.c:246:16: error: implicit declaration of function 'rtc_register_device'; did you mean 'devm_rtc_register_device'? [-Werror=implicit-function-declaration]
     246 |         return rtc_register_device(rtc->rtc_dev);
         |                ^~~~~~~~~~~~~~~~~~~
         |                devm_rtc_register_device
   cc1: some warnings being treated as errors


vim +/writel_relaxed +90 drivers/rtc/rtc-cv1800b.c

    83	
    84	static int cv1800b_rtc_alarm_irq_enable(struct device *dev,
    85						unsigned int enabled)
    86	{
    87		struct cv1800b_rtc_priv *data = dev_get_drvdata(dev);
    88	
    89		if (enabled)
  > 90			writel_relaxed(REG_ENABLE_FUN, data->core_map + RTC_ALARM_ENABLE);
    91		else
    92			writel_relaxed(REG_DISABLE_FUN,
    93				       data->core_map + RTC_ALARM_ENABLE);
    94	
    95		return 0;
    96	}
    97	
    98	static int cv1800b_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alrm)
    99	{
   100		struct cv1800b_rtc_priv *data = dev_get_drvdata(dev);
   101		unsigned long time = rtc_tm_to_time64(&alrm->time);
   102	
   103		writel_relaxed(time, data->core_map + RTC_ALARM_TIME);
   104	
   105		cv1800b_rtc_alarm_irq_enable(dev, 1);
   106	
   107		return 0;
   108	}
   109	
   110	static int cv1800b_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alrm)
   111	{
   112		u32 alrm_time, now_time;
   113		struct cv1800b_rtc_priv *data = dev_get_drvdata(dev);
   114	
 > 115		alrm_time = readl(data->core_map + RTC_ALARM_TIME);
   116		now_time = readl(data->core_map + RTC_SEC_CNTR_VALUE);
   117		rtc_time64_to_tm(alrm_time, &alrm->time);
   118		alrm->pending = now_time > alrm_time ? 1 : 0;
   119		alrm->enabled = readl(data->core_map + RTC_ALARM_ENABLE);
   120	
   121		return 0;
   122	}
   123	
   124	static int cv1800b_rtc_softinit(struct cv1800b_rtc_priv *dev)
   125	{
   126		u32 timeout = 20;
   127	
 > 128		writel(ACTIVATE_RTC_POR_DB_MAGIC_KEY,
   129		       dev->core_map + RTC_POR_DB_MAGIC_KEY);
   130		writel(INIT_LOAD_TIME, dev->core_map + RTC_SET_SEC_CNTR_VALUE);
   131		writel(REG_DISABLE_FUN, dev->core_map + RTC_SET_SEC_CNTR_TRIG);
   132	
   133		while (readl(dev->core_map + RTC_SEC_CNTR_VALUE) == INIT_LOAD_TIME
   134		       && timeout--)
   135			udelay(5);
   136	
   137		if (!timeout)
   138			return -1;
   139		return 0;
   140	}
   141	
   142	static int cv1800b_rtc_read_time(struct device *dev, struct rtc_time *tm)
   143	{
   144		struct cv1800b_rtc_priv *data = dev_get_drvdata(dev);
   145		u32 time = 0;
   146	
   147		if (!data)
   148			return -1;
   149	
 > 150		time = readl_relaxed(data->core_map + RTC_SEC_CNTR_VALUE);
   151		rtc_time64_to_tm(time, tm);
   152	
   153		return 0;
   154	}
   155	

-- 
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki

[PATCH 3/3] riscv: dts: sophgo: add rtc dt node for CV1800B

[Jingbao Qiu]

Add the rtc device tree node to CV1800B SoC.

Signed-off-by: Jingbao Qiu <qiujingbao.dlmu@gmail.com>
---
 arch/riscv/boot/dts/sophgo/cv1800b.dtsi | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/arch/riscv/boot/dts/sophgo/cv1800b.dtsi b/arch/riscv/boot/dts/sophgo/cv1800b.dtsi
index df40e87ee063..89411c75b89a 100644
--- a/arch/riscv/boot/dts/sophgo/cv1800b.dtsi
+++ b/arch/riscv/boot/dts/sophgo/cv1800b.dtsi
@@ -119,5 +119,13 @@ clint: timer@74000000 {
 			reg = <0x74000000 0x10000>;
 			interrupts-extended = <&cpu0_intc 3>, <&cpu0_intc 7>;
 		};
+
+		rtc: rtc-controller@05026000 {
+			compatible = "sophgo,cv800b-rtc";
+			reg = <0x05026000 0x1000>;
+			interrupts = <17 IRQ_TYPE_LEVEL_HIGH>;
+			interrupt-parent = <&plic>;
+			clocks = <&osc>;
+		};
 	};
 };
-- 
2.25.1

Re: [PATCH 3/3] riscv: dts: sophgo: add rtc dt node for CV1800B

[Krzysztof Kozlowski]

On 21/11/2023 10:46, Jingbao Qiu wrote:
> Add the rtc device tree node to CV1800B SoC.
> 
> Signed-off-by: Jingbao Qiu <qiujingbao.dlmu@gmail.com>
> ---
>  arch/riscv/boot/dts/sophgo/cv1800b.dtsi | 8 ++++++++
>  1 file changed, 8 insertions(+)
> 
> diff --git a/arch/riscv/boot/dts/sophgo/cv1800b.dtsi b/arch/riscv/boot/dts/sophgo/cv1800b.dtsi
> index df40e87ee063..89411c75b89a 100644
> --- a/arch/riscv/boot/dts/sophgo/cv1800b.dtsi
> +++ b/arch/riscv/boot/dts/sophgo/cv1800b.dtsi
> @@ -119,5 +119,13 @@ clint: timer@74000000 {
>  			reg = <0x74000000 0x10000>;
>  			interrupts-extended = <&cpu0_intc 3>, <&cpu0_intc 7>;
>  		};
> +
> +		rtc: rtc-controller@05026000 {
> +			compatible = "sophgo,cv800b-rtc";
> +			reg = <0x05026000 0x1000>;
> +			interrupts = <17 IRQ_TYPE_LEVEL_HIGH>;
> +			interrupt-parent = <&plic>;
> +			clocks = <&osc>;
> +		};

It does not look like you tested the DTS against bindings. Please run
`make dtbs_check W=1` (see
Documentation/devicetree/bindings/writing-schema.rst or
https://www.linaro.org/blog/tips-and-tricks-for-validating-devicetree-sources-with-the-devicetree-schema/
for instructions).

Best regards,
Krzysztof

Re: [PATCH 3/3] riscv: dts: sophgo: add rtc dt node for CV1800B

[jingbao qiu]

On Tue, Nov 21, 2023 at 6:00 PM Krzysztof Kozlowski
<krzysztof.kozlowski@linaro.org> wrote:
>
> On 21/11/2023 10:46, Jingbao Qiu wrote:
> > Add the rtc device tree node to CV1800B SoC.
> >
> > Signed-off-by: Jingbao Qiu <qiujingbao.dlmu@gmail.com>
> > ---
> >  arch/riscv/boot/dts/sophgo/cv1800b.dtsi | 8 ++++++++
> >  1 file changed, 8 insertions(+)
> >
> > diff --git a/arch/riscv/boot/dts/sophgo/cv1800b.dtsi b/arch/riscv/boot/dts/sophgo/cv1800b.dtsi
> > index df40e87ee063..89411c75b89a 100644
> > --- a/arch/riscv/boot/dts/sophgo/cv1800b.dtsi
> > +++ b/arch/riscv/boot/dts/sophgo/cv1800b.dtsi
> > @@ -119,5 +119,13 @@ clint: timer@74000000 {
> >                       reg = <0x74000000 0x10000>;
> >                       interrupts-extended = <&cpu0_intc 3>, <&cpu0_intc 7>;
> >               };
> > +
> > +             rtc: rtc-controller@05026000 {
> > +                     compatible = "sophgo,cv800b-rtc";
> > +                     reg = <0x05026000 0x1000>;
> > +                     interrupts = <17 IRQ_TYPE_LEVEL_HIGH>;
> > +                     interrupt-parent = <&plic>;
> > +                     clocks = <&osc>;
> > +             };
>
> It does not look like you tested the DTS against bindings. Please run
> `make dtbs_check W=1` (see
> Documentation/devicetree/bindings/writing-schema.rst or
> https://www.linaro.org/blog/tips-and-tricks-for-validating-devicetree-sources-with-the-devicetree-schema/
> for instructions).

I will check it.

>
> Best regards,
> Krzysztof
>

Best regards,
Jingbao Qiu