Add thermal driver for Sunplus.
Signed-off-by: Li-hao Kuo <[email protected]>
---
Changes in v9:
- Change the setting of compatible
- Mosdify the setting of remove funciton.
MAINTAINERS | 6 ++
drivers/thermal/Kconfig | 10 +++
drivers/thermal/Makefile | 1 +
drivers/thermal/sunplus_thermal.c | 139 ++++++++++++++++++++++++++++++++++++++
4 files changed, 156 insertions(+)
create mode 100644 drivers/thermal/sunplus_thermal.c
diff --git a/MAINTAINERS b/MAINTAINERS
index a6d3bd9..23bde07 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -19103,6 +19103,12 @@ S: Maintained
F: Documentation/devicetree/bindings/spi/spi-sunplus-sp7021.yaml
F: drivers/spi/spi-sunplus-sp7021.c
+SUNPLUS THERMAL DRIVER
+M: Li-hao Kuo <[email protected]>
+L: [email protected]
+S: Maintained
+F: drivers/thermal/sunplus_thermal.c
+
SUNPLUS UART DRIVER
M: Hammer Hsieh <[email protected]>
S: Maintained
diff --git a/drivers/thermal/Kconfig b/drivers/thermal/Kconfig
index 0e5cc94..c85e668 100644
--- a/drivers/thermal/Kconfig
+++ b/drivers/thermal/Kconfig
@@ -504,4 +504,14 @@ config KHADAS_MCU_FAN_THERMAL
If you say yes here you get support for the FAN controlled
by the Microcontroller found on the Khadas VIM boards.
+config SUNPLUS_THERMAL
+ tristate "Sunplus thermal drivers"
+ depends on SOC_SP7021 || COMPILE_TEST
+ help
+ This enable the Sunplus SP7021 thermal driver, which supports the primitive
+ temperature sensor embedded in Sunplus SP7021 SoC.
+
+ If you have a Sunplus SP7021 platform say Y here and enable this option
+ to have support for thermal management
+
endif
diff --git a/drivers/thermal/Makefile b/drivers/thermal/Makefile
index def8e1a..b603730 100644
--- a/drivers/thermal/Makefile
+++ b/drivers/thermal/Makefile
@@ -61,3 +61,4 @@ obj-$(CONFIG_UNIPHIER_THERMAL) += uniphier_thermal.o
obj-$(CONFIG_AMLOGIC_THERMAL) += amlogic_thermal.o
obj-$(CONFIG_SPRD_THERMAL) += sprd_thermal.o
obj-$(CONFIG_KHADAS_MCU_FAN_THERMAL) += khadas_mcu_fan.o
+obj-$(CONFIG_SUNPLUS_THERMAL) += sunplus_thermal.o
diff --git a/drivers/thermal/sunplus_thermal.c
b/drivers/thermal/sunplus_thermal.c
new file mode 100644
index 0000000..ed73a15
--- /dev/null
+++ b/drivers/thermal/sunplus_thermal.c
@@ -0,0 +1,139 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (c) Sunplus Inc.
+ * Author: Li-hao Kuo <[email protected]>
+ */
+
+#include <linux/bitfield.h>
+#include <linux/clk.h>
+#include <linux/delay.h>
+#include <linux/io.h>
+#include <linux/module.h>
+#include <linux/nvmem-consumer.h>
+#include <linux/platform_device.h>
+#include <linux/reset.h>
+#include <linux/thermal.h>
+
+#define ENABLE_THERMAL BIT(31)
+#define SP_THERMAL_MASK GENMASK(10, 0)
+
+#define TEMP_RATE 608
+#define TEMP_BASE 3500
+#define TEMP_OTP_BASE 1518
+
+#define SP_THERMAL_CTL0_REG 0x0000
+#define SP_THERMAL_STS0_REG 0x0030
+
+/* common data structures */
+struct sp_thermal_data {
+ struct thermal_zone_device *pcb_tz;
+ void __iomem *regs;
+ int *otp_temp0;
+};
+
+static int sunplus_get_otp_temp_coef(struct sp_thermal_data *sp_data,
struct device *dev)
+{
+ struct nvmem_cell *cell;
+ ssize_t otp_l;
+
+ cell = nvmem_cell_get(dev, "calib");
+ if (IS_ERR(cell))
+ return PTR_ERR(cell);
+
+ sp_data->otp_temp0 = nvmem_cell_read(cell, &otp_l);
+ nvmem_cell_put(cell);
+
+ if (*sp_data->otp_temp0 == 0)
+ *sp_data->otp_temp0 = TEMP_OTP_BASE;
+
+ return 0;
+}
+
+/*
+ * There is a thermal sensor instance for Sunplus Soc
+ * T_CODE is the ADC of the thermal sensor
+ * T_CODE : 11 digits in total
+ * When remanufacturing, the 35 degree T_CODE will be read and stored
in nvcell.
+ * otp_temp0 is the 35 degree T_CODE obtained from nvcell
+ * The function will get 35 degree T_CODE for thermal calibration.
+ * TEMP_RATE is the Sunplus thermal temperature slope.
+ */
+
+static int sp_thermal_get_sensor_temp(void *data, int *temp)
+{
+ struct sp_thermal_data *sp_data = data;
+ int t_code;
+
+ t_code = readl(sp_data->regs + SP_THERMAL_STS0_REG);
+ t_code = FIELD_GET(SP_THERMAL_MASK, t_code);
+ *temp = ((*sp_data->otp_temp0 - t_code) * 10000 / TEMP_RATE) + TEMP_BASE;
+ *temp *= 10;
+ return 0;
+}
+
+static const struct thermal_zone_of_device_ops sp_of_thermal_ops = {
+ .get_temp = sp_thermal_get_sensor_temp,
+};
+
+static int sunplus_thermal_probe(struct platform_device *pdev)
+{
+ struct sp_thermal_data *sp_data;
+ int ret;
+
+ sp_data = devm_kzalloc(&pdev->dev, sizeof(*sp_data), GFP_KERNEL);
+ if (!sp_data)
+ return -ENOMEM;
+
+ sp_data->regs = devm_platform_ioremap_resource(pdev, 0);
+ if (IS_ERR(sp_data->regs)) {
+ dev_err(&pdev->dev, "resource get fail\n");
+ return PTR_ERR(sp_data->regs);
+ }
+
+ writel(ENABLE_THERMAL, sp_data->regs + SP_THERMAL_CTL0_REG);
+
+ platform_set_drvdata(pdev, sp_data);
+ ret = sunplus_get_otp_temp_coef(sp_data, &pdev->dev);
+ if (ret)
+ return ret;
+
+ sp_data->pcb_tz = devm_thermal_zone_of_sensor_register(&pdev->dev,
+ 0,
+ sp_data, &sp_of_thermal_ops);
+
+ if (IS_ERR(sp_data->pcb_tz)) {
+ ret = PTR_ERR(sp_data->pcb_tz);
+ dev_err(dev, "Failed to register tsensor: %d\n", ret);
+ return ret;
+ }
+
+ return ret;
+}
+
+static int sunplus_thermal_remove(struct platform_device *pdev)
+{
+ struct sp_thermal_data *sp_data = platform_get_drvdata(pdev);
+
+ thermal_zone_of_sensor_unregister(&pdev->dev, sp_data->pcb_tz);
+ return 0;
+}
+
+static const struct of_device_id of_sunplus_thermal_ids[] = {
+ { .compatible = "sunplus,sp7021-thermal" },
+ { /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(of, of_sunplus_thermal_ids);
+
+static struct platform_driver sunplus_thermal_driver = {
+ .probe = sunplus_thermal_probe,
+ .remove = sunplus_thermal_remove,
+ .driver = {
+ .name = "sunplus-thermal",
+ .of_match_table = of_sunplus_thermal_ids,
+ },
+};
+module_platform_driver(sunplus_thermal_driver);
+
+MODULE_AUTHOR("Li-hao Kuo <[email protected]>");
+MODULE_DESCRIPTION("Thermal driver for Sunplus SoC");
+MODULE_LICENSE("GPL");
--
2.7.4
Hi--
On 6/9/22 18:32, 郭力豪 wrote:
> diff --git a/drivers/thermal/Kconfig b/drivers/thermal/Kconfig
> index 0e5cc94..c85e668 100644
> --- a/drivers/thermal/Kconfig
> +++ b/drivers/thermal/Kconfig
> @@ -504,4 +504,14 @@ config KHADAS_MCU_FAN_THERMAL
> If you say yes here you get support for the FAN controlled
> by the Microcontroller found on the Khadas VIM boards.
>
> +config SUNPLUS_THERMAL
> + tristate "Sunplus thermal drivers"
> + depends on SOC_SP7021 || COMPILE_TEST
> + help
> + This enable the Sunplus SP7021 thermal driver, which supports the primitive
> + temperature sensor embedded in Sunplus SP7021 SoC.
> +
> + If you have a Sunplus SP7021 platform say Y here and enable this option
> + to have support for thermal management
End the sentence above with a period ('.').
And the indentation here is all messed up.
See Documentation/process/coding-style.rst:
10) Kconfig configuration files
-------------------------------
For all of the Kconfig* configuration files throughout the source tree,
the indentation is somewhat different. Lines under a ``config`` definition
are indented with one tab, while help text is indented an additional two
spaces.
> +
> endif
--
~Randy
On 10/06/2022 05:19, Randy Dunlap wrote:
> Hi--
>
> On 6/9/22 18:32, 郭力豪 wrote:
>> diff --git a/drivers/thermal/Kconfig b/drivers/thermal/Kconfig
>> index 0e5cc94..c85e668 100644
>> --- a/drivers/thermal/Kconfig
>> +++ b/drivers/thermal/Kconfig
>> @@ -504,4 +504,14 @@ config KHADAS_MCU_FAN_THERMAL
>> If you say yes here you get support for the FAN controlled
>> by the Microcontroller found on the Khadas VIM boards.
>>
>> +config SUNPLUS_THERMAL
>> + tristate "Sunplus thermal drivers"
>> + depends on SOC_SP7021 || COMPILE_TEST
>> + help
>> + This enable the Sunplus SP7021 thermal driver, which supports the primitive
>> + temperature sensor embedded in Sunplus SP7021 SoC.
>> +
>> + If you have a Sunplus SP7021 platform say Y here and enable this option
>> + to have support for thermal management
>
> End the sentence above with a period ('.').
>
> And the indentation here is all messed up.
> See Documentation/process/coding-style.rst:
>
It's not only this one. Entire file has wrong indentation.
Best regards,
Krzysztof
I'm sorry for the wrong indentation problem, it was caused by a wrong setting in the mail server.I will fix it in the next patch.
> -----Original Message-----
> From: Krzysztof Kozlowski <[email protected]>
> Sent: Friday, June 10, 2022 6:30 PM
> To: Randy Dunlap <[email protected]>; 郭力豪 <[email protected]>; [email protected];
> Daniel Lezcano <[email protected]>; [email protected]; [email protected];
> [email protected]; [email protected]; [email protected];
> [email protected]
> Cc: Lh Kuo 郭力豪 <[email protected]>; Wells Lu 呂芳騰 <[email protected]>
> Subject: Re: [PATCH v9 1/2] thermal: Add thermal driver for Sunplus
>
> On 10/06/2022 05:19, Randy Dunlap wrote:
> > Hi--
> >
> > On 6/9/22 18:32, 郭力豪 wrote:
> >> diff --git a/drivers/thermal/Kconfig b/drivers/thermal/Kconfig index
> >> 0e5cc94..c85e668 100644
> >> --- a/drivers/thermal/Kconfig
> >> +++ b/drivers/thermal/Kconfig
> >> @@ -504,4 +504,14 @@ config KHADAS_MCU_FAN_THERMAL
> >> If you say yes here you get support for the FAN controlled
> >> by the Microcontroller found on the Khadas VIM boards.
> >>
> >> +config SUNPLUS_THERMAL
> >> + tristate "Sunplus thermal drivers"
> >> + depends on SOC_SP7021 || COMPILE_TEST help
> >> + This enable the Sunplus SP7021 thermal driver, which supports the primitive
> >> + temperature sensor embedded in Sunplus SP7021 SoC.
> >> +
> >> + If you have a Sunplus SP7021 platform say Y here and enable this option
> >> + to have support for thermal management
> >
> > End the sentence above with a period ('.').
> >
> > And the indentation here is all messed up.
> > See Documentation/process/coding-style.rst:
> >
>
> It's not only this one. Entire file has wrong indentation.
>
> Best regards,
> Krzysztof
I'm sorry for the wrong indentation problem, it was caused by a wrong setting in the mail server.I will fix it in the next patch.
> -----Original Message-----
> From: Randy Dunlap <[email protected]>
> Sent: Friday, June 10, 2022 11:20 AM
> To: 郭力豪 <[email protected]>; [email protected]; [email protected]; Daniel Lezcano
> <[email protected]>; [email protected]; [email protected]; [email protected];
> [email protected]; [email protected]; [email protected]
> Cc: Lh Kuo 郭力豪 <[email protected]>; Wells Lu 呂芳騰 <[email protected]>
> Subject: Re: [PATCH v9 1/2] thermal: Add thermal driver for Sunplus
>
> Hi--
>
> On 6/9/22 18:32, 郭力豪 wrote:
> > diff --git a/drivers/thermal/Kconfig b/drivers/thermal/Kconfig index
> > 0e5cc94..c85e668 100644
> > --- a/drivers/thermal/Kconfig
> > +++ b/drivers/thermal/Kconfig
> > @@ -504,4 +504,14 @@ config KHADAS_MCU_FAN_THERMAL
> > If you say yes here you get support for the FAN controlled
> > by the Microcontroller found on the Khadas VIM boards.
> >
> > +config SUNPLUS_THERMAL
> > + tristate "Sunplus thermal drivers"
> > + depends on SOC_SP7021 || COMPILE_TEST help
> > + This enable the Sunplus SP7021 thermal driver, which supports the primitive
> > + temperature sensor embedded in Sunplus SP7021 SoC.
> > +
> > + If you have a Sunplus SP7021 platform say Y here and enable this option
> > + to have support for thermal management
>
> End the sentence above with a period ('.').
>
> And the indentation here is all messed up.
> See Documentation/process/coding-style.rst:
>
> 10) Kconfig configuration files
> -------------------------------
>
> For all of the Kconfig* configuration files throughout the source tree, the indentation is somewhat
> different. Lines under a ``config`` definition are indented with one tab, while help text is indented an
> additional two spaces.
>
>
> > +
> > endif
>
> --
> ~Randy