[PATCH v6] hwmon: Add driver for STMicroelectronics PM6764 Voltage Regulator.

[PATCH v6] hwmon: Add driver for STMicroelectronics PM6764 Voltage Regulator.

[Charles Hsu]

The output voltage use the MFR_READ_VOUT 0xD4
Vout value returned is linear11.

Signed-off-by: Charles Hsu <hsu.yungteng@gmail.com>
---
v6:
 - Fix misspelling.
v5:
 - Add MAINTAINERS.
v4:
 - Add pm6764tr to Documentation/hwmon/index.rst.
v3:
 - Add Documentation(Documentation/hwmon/pm6764tr.rst).
 - Fix include order.
v2:
 - Fix formatting.
 - Remove pmbus_do_remove.
 - Change from .probe to .probe_new.
v1:
 - Initial patchset.
---
 Documentation/hwmon/index.rst    |  1 +
 Documentation/hwmon/pm6764tr.rst | 32 ++++++++++++++
 MAINTAINERS                      |  7 +++
 drivers/hwmon/pmbus/Kconfig      |  9 ++++
 drivers/hwmon/pmbus/Makefile     |  1 +
 drivers/hwmon/pmbus/pm6764tr.c   | 76 ++++++++++++++++++++++++++++++++
 6 files changed, 126 insertions(+)
 create mode 100644 Documentation/hwmon/pm6764tr.rst
 create mode 100644 drivers/hwmon/pmbus/pm6764tr.c

diff --git a/Documentation/hwmon/index.rst b/Documentation/hwmon/index.rst
index b797db738225..b3ed0047543b 100644
--- a/Documentation/hwmon/index.rst
+++ b/Documentation/hwmon/index.rst
@@ -144,6 +144,7 @@ Hardware Monitoring Kernel Drivers
    pc87360
    pc87427
    pcf8591
+   pm6764
    pmbus
    powr1220
    pxe1610
diff --git a/Documentation/hwmon/pm6764tr.rst b/Documentation/hwmon/pm6764tr.rst
new file mode 100644
index 000000000000..4681780d3f0d
--- /dev/null
+++ b/Documentation/hwmon/pm6764tr.rst
@@ -0,0 +1,32 @@
+.. SPDX-License-Identifier: GPL-2.0-only
+
+Kernel driver pm6764tr
+======================
+
+Supported chips:
+
+  * ST PM6764TR
+
+	Prefix: 'pm6764tr'
+
+	Addresses scanned: -
+
+	Datasheet: http://www.st.com/resource/en/data_brief/pm6764.pdf
+
+Authors:
+	<hsu.yungteng@gmail.com>
+
+Description:
+------------
+
+This driver supports the STMicroelectronics PM6764TR chip. The PM6764TR is a high
+performance digital controller designed to power Intel’s VR12.5 processors and memories.
+
+The device utilizes digital technology to implement all control and power management
+functions to provide maximum flexibility and performance. The NVM is embedded to store
+custom configurations. The PM6764TR device features up to 4-phase programmable operation.
+
+The PM6764TR supports power state transitions featuring VFDE, and programmable DPM
+maintaining the best efficiency over all loading conditions without compromising transient
+response. The device assures fast and independent protection against load overcurrent,
+under/overvoltage and feedback disconnections.
diff --git a/MAINTAINERS b/MAINTAINERS
index 2daa6ee673f7..0456a2101622 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -13893,6 +13893,13 @@ M:	Logan Gunthorpe <logang@deltatee.com>
 S:	Maintained
 F:	drivers/dma/plx_dma.c
 
+PM6764TR DRIVER
+M:	Charles Hsu	<hsu.yungteng@gmail.com>
+L:	linux-hwmon@vger.kernel.org
+S:	Maintained
+F:	Documentation/hwmon/pm6764tr.rst
+F:	drivers/hwmon/pmbus/pm6764tr.c
+
 PM-GRAPH UTILITY
 M:	"Todd E Brandt" <todd.e.brandt@linux.intel.com>
 L:	linux-pm@vger.kernel.org
diff --git a/drivers/hwmon/pmbus/Kconfig b/drivers/hwmon/pmbus/Kconfig
index a25faf69fce3..9c846facce9f 100644
--- a/drivers/hwmon/pmbus/Kconfig
+++ b/drivers/hwmon/pmbus/Kconfig
@@ -220,6 +220,15 @@ config SENSORS_MP2975
 	  This driver can also be built as a module. If so, the module will
 	  be called mp2975.
 
+config SENSORS_PM6764TR
+	tristate "ST PM6764TR"
+	help
+	  If you say yes here you get hardware monitoring support for ST
+	  PM6764TR.
+
+	  This driver can also be built as a module. If so, the module will
+	  be called pm6764tr.
+
 config SENSORS_PXE1610
 	tristate "Infineon PXE1610"
 	help
diff --git a/drivers/hwmon/pmbus/Makefile b/drivers/hwmon/pmbus/Makefile
index 4c97ad0bd791..31ebdef5d4a6 100644
--- a/drivers/hwmon/pmbus/Makefile
+++ b/drivers/hwmon/pmbus/Makefile
@@ -25,6 +25,7 @@ obj-$(CONFIG_SENSORS_MAX31785)	+= max31785.o
 obj-$(CONFIG_SENSORS_MAX34440)	+= max34440.o
 obj-$(CONFIG_SENSORS_MAX8688)	+= max8688.o
 obj-$(CONFIG_SENSORS_MP2975)	+= mp2975.o
+obj-$(CONFIG_SENSORS_PM6764TR)	+= pm6764tr.o
 obj-$(CONFIG_SENSORS_PXE1610)	+= pxe1610.o
 obj-$(CONFIG_SENSORS_TPS40422)	+= tps40422.o
 obj-$(CONFIG_SENSORS_TPS53679)	+= tps53679.o
diff --git a/drivers/hwmon/pmbus/pm6764tr.c b/drivers/hwmon/pmbus/pm6764tr.c
new file mode 100644
index 000000000000..9531f370d7df
--- /dev/null
+++ b/drivers/hwmon/pmbus/pm6764tr.c
@@ -0,0 +1,76 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Hardware monitoring driver for STMicroelectronics digital controller PM6764TR
+ */
+
+#include <linux/err.h>
+#include <linux/i2c.h>
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/pmbus.h>
+#include "pmbus.h"
+
+#define PM6764TR_PMBUS_READ_VOUT	0xD4
+
+static int pm6764tr_read_word_data(struct i2c_client *client, int page, int reg)
+{
+	int ret;
+
+	switch (reg) {
+	case PMBUS_VIRT_READ_VMON:
+		ret = pmbus_read_word_data(client, page, PM6764TR_PMBUS_READ_VOUT);
+		break;
+	default:
+		ret = -ENODATA;
+		break;
+	}
+	return ret;
+}
+
+static struct pmbus_driver_info pm6764tr_info = {
+	.pages = 1,
+	.format[PSC_VOLTAGE_IN] = linear,
+	.format[PSC_VOLTAGE_OUT] = vid,
+	.format[PSC_TEMPERATURE] = linear,
+	.format[PSC_CURRENT_OUT] = linear,
+	.format[PSC_POWER] = linear,
+	.func[0] = PMBUS_HAVE_VIN | PMBUS_HAVE_IIN |  PMBUS_HAVE_PIN |
+		PMBUS_HAVE_IOUT | PMBUS_HAVE_POUT | PMBUS_HAVE_VMON |
+		PMBUS_HAVE_STATUS_IOUT | PMBUS_HAVE_STATUS_VOUT |
+		PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP,
+	.read_word_data = pm6764tr_read_word_data,
+};
+
+static int pm6764tr_probe(struct i2c_client *client,
+			  const struct i2c_device_id *id)
+{
+	return pmbus_do_probe(client, id, &pm6764tr_info);
+}
+
+static const struct i2c_device_id pm6764tr_id[] = {
+	{"pm6764tr", 0},
+	{}
+};
+MODULE_DEVICE_TABLE(i2c, pm6764tr_id);
+
+static const struct of_device_id pm6764tr_of_match[] = {
+	{.compatible = "st,pm6764tr"},
+	{}
+};
+
+/* This is the driver that will be inserted */
+static struct i2c_driver pm6764tr_driver = {
+	.driver = {
+		   .name = "pm6764tr",
+		   .of_match_table = of_match_ptr(pm6764tr_of_match),
+		   },
+	.probe_new = pm6764tr_probe,
+	.id_table = pm6764tr_id,
+};
+
+module_i2c_driver(pm6764tr_driver);
+
+MODULE_AUTHOR("Charles Hsu");
+MODULE_DESCRIPTION("PMBus driver for  ST PM6764TR");
+MODULE_LICENSE("GPL");
-- 
2.25.1

Re: [PATCH v6] hwmon: Add driver for STMicroelectronics PM6764 Voltage Regulator.

[Guenter Roeck]

On Fri, Dec 11, 2020 at 05:46:05PM +0800, Charles Hsu wrote:
> The output voltage use the MFR_READ_VOUT 0xD4
> Vout value returned is linear11.
> 
> Signed-off-by: Charles Hsu <hsu.yungteng@gmail.com>

I'll keep the patch I already applied, with all the _compile_
problems fixed. Please check out hwmon-next and submit follow-up
patches if needed.

Guenter

> ---
> v6:
>  - Fix misspelling.
> v5:
>  - Add MAINTAINERS.
> v4:
>  - Add pm6764tr to Documentation/hwmon/index.rst.
> v3:
>  - Add Documentation(Documentation/hwmon/pm6764tr.rst).
>  - Fix include order.
> v2:
>  - Fix formatting.
>  - Remove pmbus_do_remove.
>  - Change from .probe to .probe_new.
> v1:
>  - Initial patchset.
> ---
>  Documentation/hwmon/index.rst    |  1 +
>  Documentation/hwmon/pm6764tr.rst | 32 ++++++++++++++
>  MAINTAINERS                      |  7 +++
>  drivers/hwmon/pmbus/Kconfig      |  9 ++++
>  drivers/hwmon/pmbus/Makefile     |  1 +
>  drivers/hwmon/pmbus/pm6764tr.c   | 76 ++++++++++++++++++++++++++++++++
>  6 files changed, 126 insertions(+)
>  create mode 100644 Documentation/hwmon/pm6764tr.rst
>  create mode 100644 drivers/hwmon/pmbus/pm6764tr.c
> 
> diff --git a/Documentation/hwmon/index.rst b/Documentation/hwmon/index.rst
> index b797db738225..b3ed0047543b 100644
> --- a/Documentation/hwmon/index.rst
> +++ b/Documentation/hwmon/index.rst
> @@ -144,6 +144,7 @@ Hardware Monitoring Kernel Drivers
>     pc87360
>     pc87427
>     pcf8591
> +   pm6764
>     pmbus
>     powr1220
>     pxe1610
> diff --git a/Documentation/hwmon/pm6764tr.rst b/Documentation/hwmon/pm6764tr.rst
> new file mode 100644
> index 000000000000..4681780d3f0d
> --- /dev/null
> +++ b/Documentation/hwmon/pm6764tr.rst
> @@ -0,0 +1,32 @@
> +.. SPDX-License-Identifier: GPL-2.0-only
> +
> +Kernel driver pm6764tr
> +======================
> +
> +Supported chips:
> +
> +  * ST PM6764TR
> +
> +	Prefix: 'pm6764tr'
> +
> +	Addresses scanned: -
> +
> +	Datasheet: http://www.st.com/resource/en/data_brief/pm6764.pdf
> +
> +Authors:
> +	<hsu.yungteng@gmail.com>
> +
> +Description:
> +------------
> +
> +This driver supports the STMicroelectronics PM6764TR chip. The PM6764TR is a high
> +performance digital controller designed to power Intel’s VR12.5 processors and memories.
> +
> +The device utilizes digital technology to implement all control and power management
> +functions to provide maximum flexibility and performance. The NVM is embedded to store
> +custom configurations. The PM6764TR device features up to 4-phase programmable operation.
> +
> +The PM6764TR supports power state transitions featuring VFDE, and programmable DPM
> +maintaining the best efficiency over all loading conditions without compromising transient
> +response. The device assures fast and independent protection against load overcurrent,
> +under/overvoltage and feedback disconnections.
> diff --git a/MAINTAINERS b/MAINTAINERS
> index 2daa6ee673f7..0456a2101622 100644
> --- a/MAINTAINERS
> +++ b/MAINTAINERS
> @@ -13893,6 +13893,13 @@ M:	Logan Gunthorpe <logang@deltatee.com>
>  S:	Maintained
>  F:	drivers/dma/plx_dma.c
>  
> +PM6764TR DRIVER
> +M:	Charles Hsu	<hsu.yungteng@gmail.com>
> +L:	linux-hwmon@vger.kernel.org
> +S:	Maintained
> +F:	Documentation/hwmon/pm6764tr.rst
> +F:	drivers/hwmon/pmbus/pm6764tr.c
> +
>  PM-GRAPH UTILITY
>  M:	"Todd E Brandt" <todd.e.brandt@linux.intel.com>
>  L:	linux-pm@vger.kernel.org
> diff --git a/drivers/hwmon/pmbus/Kconfig b/drivers/hwmon/pmbus/Kconfig
> index a25faf69fce3..9c846facce9f 100644
> --- a/drivers/hwmon/pmbus/Kconfig
> +++ b/drivers/hwmon/pmbus/Kconfig
> @@ -220,6 +220,15 @@ config SENSORS_MP2975
>  	  This driver can also be built as a module. If so, the module will
>  	  be called mp2975.
>  
> +config SENSORS_PM6764TR
> +	tristate "ST PM6764TR"
> +	help
> +	  If you say yes here you get hardware monitoring support for ST
> +	  PM6764TR.
> +
> +	  This driver can also be built as a module. If so, the module will
> +	  be called pm6764tr.
> +
>  config SENSORS_PXE1610
>  	tristate "Infineon PXE1610"
>  	help
> diff --git a/drivers/hwmon/pmbus/Makefile b/drivers/hwmon/pmbus/Makefile
> index 4c97ad0bd791..31ebdef5d4a6 100644
> --- a/drivers/hwmon/pmbus/Makefile
> +++ b/drivers/hwmon/pmbus/Makefile
> @@ -25,6 +25,7 @@ obj-$(CONFIG_SENSORS_MAX31785)	+= max31785.o
>  obj-$(CONFIG_SENSORS_MAX34440)	+= max34440.o
>  obj-$(CONFIG_SENSORS_MAX8688)	+= max8688.o
>  obj-$(CONFIG_SENSORS_MP2975)	+= mp2975.o
> +obj-$(CONFIG_SENSORS_PM6764TR)	+= pm6764tr.o
>  obj-$(CONFIG_SENSORS_PXE1610)	+= pxe1610.o
>  obj-$(CONFIG_SENSORS_TPS40422)	+= tps40422.o
>  obj-$(CONFIG_SENSORS_TPS53679)	+= tps53679.o
> diff --git a/drivers/hwmon/pmbus/pm6764tr.c b/drivers/hwmon/pmbus/pm6764tr.c
> new file mode 100644
> index 000000000000..9531f370d7df
> --- /dev/null
> +++ b/drivers/hwmon/pmbus/pm6764tr.c
> @@ -0,0 +1,76 @@
> +// SPDX-License-Identifier: GPL-2.0+
> +/*
> + * Hardware monitoring driver for STMicroelectronics digital controller PM6764TR
> + */
> +
> +#include <linux/err.h>
> +#include <linux/i2c.h>
> +#include <linux/init.h>
> +#include <linux/kernel.h>
> +#include <linux/module.h>
> +#include <linux/pmbus.h>
> +#include "pmbus.h"
> +
> +#define PM6764TR_PMBUS_READ_VOUT	0xD4
> +
> +static int pm6764tr_read_word_data(struct i2c_client *client, int page, int reg)
> +{
> +	int ret;
> +
> +	switch (reg) {
> +	case PMBUS_VIRT_READ_VMON:
> +		ret = pmbus_read_word_data(client, page, PM6764TR_PMBUS_READ_VOUT);
> +		break;
> +	default:
> +		ret = -ENODATA;
> +		break;
> +	}
> +	return ret;
> +}
> +
> +static struct pmbus_driver_info pm6764tr_info = {
> +	.pages = 1,
> +	.format[PSC_VOLTAGE_IN] = linear,
> +	.format[PSC_VOLTAGE_OUT] = vid,
> +	.format[PSC_TEMPERATURE] = linear,
> +	.format[PSC_CURRENT_OUT] = linear,
> +	.format[PSC_POWER] = linear,
> +	.func[0] = PMBUS_HAVE_VIN | PMBUS_HAVE_IIN |  PMBUS_HAVE_PIN |
> +		PMBUS_HAVE_IOUT | PMBUS_HAVE_POUT | PMBUS_HAVE_VMON |
> +		PMBUS_HAVE_STATUS_IOUT | PMBUS_HAVE_STATUS_VOUT |
> +		PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP,
> +	.read_word_data = pm6764tr_read_word_data,
> +};
> +
> +static int pm6764tr_probe(struct i2c_client *client,
> +			  const struct i2c_device_id *id)
> +{
> +	return pmbus_do_probe(client, id, &pm6764tr_info);
> +}
> +
> +static const struct i2c_device_id pm6764tr_id[] = {
> +	{"pm6764tr", 0},
> +	{}
> +};
> +MODULE_DEVICE_TABLE(i2c, pm6764tr_id);
> +
> +static const struct of_device_id pm6764tr_of_match[] = {
> +	{.compatible = "st,pm6764tr"},
> +	{}
> +};
> +
> +/* This is the driver that will be inserted */
> +static struct i2c_driver pm6764tr_driver = {
> +	.driver = {
> +		   .name = "pm6764tr",
> +		   .of_match_table = of_match_ptr(pm6764tr_of_match),
> +		   },
> +	.probe_new = pm6764tr_probe,
> +	.id_table = pm6764tr_id,
> +};
> +
> +module_i2c_driver(pm6764tr_driver);
> +
> +MODULE_AUTHOR("Charles Hsu");
> +MODULE_DESCRIPTION("PMBus driver for  ST PM6764TR");
> +MODULE_LICENSE("GPL");

Re: [PATCH v6] hwmon: Add driver for STMicroelectronics PM6764 Voltage Regulator.

[kernel test robot]

[-- Attachment #1: Type: text/plain, Size: 5241 bytes --]

Hi Charles,

I love your patch! Yet something to improve:

[auto build test ERROR on linux/master]
[also build test ERROR on linus/master v5.10]
[cannot apply to hwmon/hwmon-next next-20201215]
[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]

url:    https://github.com/0day-ci/linux/commits/Charles-Hsu/hwmon-Add-driver-for-STMicroelectronics-PM6764-Voltage-Regulator/20201211-175428
base:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git 09162bc32c880a791c6c0668ce0745cf7958f576
config: x86_64-randconfig-a012-20201215 (attached as .config)
compiler: clang version 12.0.0 (https://github.com/llvm/llvm-project a29ecca7819a6ed4250d3689b12b1f664bb790d7)
reproduce (this is a W=1 build):
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # install x86_64 cross compiling tool for clang build
        # apt-get install binutils-x86-64-linux-gnu
        # https://github.com/0day-ci/linux/commit/b03a990fad3a963b4dd9801a24c2e4acae91d2cf
        git remote add linux-review https://github.com/0day-ci/linux
        git fetch --no-tags linux-review Charles-Hsu/hwmon-Add-driver-for-STMicroelectronics-PM6764-Voltage-Regulator/20201211-175428
        git checkout b03a990fad3a963b4dd9801a24c2e4acae91d2cf
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=x86_64 

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>

All errors (new ones prefixed by >>):

>> drivers/hwmon/pmbus/pm6764tr.c:22:68: error: too few arguments to function call, expected 4, have 3
                   ret = pmbus_read_word_data(client, page, PM6764TR_PMBUS_READ_VOUT);
                         ~~~~~~~~~~~~~~~~~~~~                                       ^
   drivers/hwmon/pmbus/pmbus.h:479:5: note: 'pmbus_read_word_data' declared here
   int pmbus_read_word_data(struct i2c_client *client, int page, int phase,
       ^
>> drivers/hwmon/pmbus/pm6764tr.c:42:20: error: incompatible function pointer types initializing 'int (*)(struct i2c_client *, int, int, int)' with an expression of type 'int (struct i2c_client *, int, int)' [-Werror,-Wincompatible-function-pointer-types]
           .read_word_data = pm6764tr_read_word_data,
                             ^~~~~~~~~~~~~~~~~~~~~~~
>> drivers/hwmon/pmbus/pm6764tr.c:48:36: error: too many arguments to function call, expected 2, have 3
           return pmbus_do_probe(client, id, &pm6764tr_info);
                  ~~~~~~~~~~~~~~             ^~~~~~~~~~~~~~
   drivers/hwmon/pmbus/pmbus.h:492:5: note: 'pmbus_do_probe' declared here
   int pmbus_do_probe(struct i2c_client *client, struct pmbus_driver_info *info);
       ^
>> drivers/hwmon/pmbus/pm6764tr.c:68:15: error: incompatible function pointer types initializing 'int (*)(struct i2c_client *)' with an expression of type 'int (struct i2c_client *, const struct i2c_device_id *)' [-Werror,-Wincompatible-function-pointer-types]
           .probe_new = pm6764tr_probe,
                        ^~~~~~~~~~~~~~
   4 errors generated.

vim +22 drivers/hwmon/pmbus/pm6764tr.c

    15	
    16	static int pm6764tr_read_word_data(struct i2c_client *client, int page, int reg)
    17	{
    18		int ret;
    19	
    20		switch (reg) {
    21		case PMBUS_VIRT_READ_VMON:
  > 22			ret = pmbus_read_word_data(client, page, PM6764TR_PMBUS_READ_VOUT);
    23			break;
    24		default:
    25			ret = -ENODATA;
    26			break;
    27		}
    28		return ret;
    29	}
    30	
    31	static struct pmbus_driver_info pm6764tr_info = {
    32		.pages = 1,
    33		.format[PSC_VOLTAGE_IN] = linear,
    34		.format[PSC_VOLTAGE_OUT] = vid,
    35		.format[PSC_TEMPERATURE] = linear,
    36		.format[PSC_CURRENT_OUT] = linear,
    37		.format[PSC_POWER] = linear,
    38		.func[0] = PMBUS_HAVE_VIN | PMBUS_HAVE_IIN |  PMBUS_HAVE_PIN |
    39			PMBUS_HAVE_IOUT | PMBUS_HAVE_POUT | PMBUS_HAVE_VMON |
    40			PMBUS_HAVE_STATUS_IOUT | PMBUS_HAVE_STATUS_VOUT |
    41			PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP,
  > 42		.read_word_data = pm6764tr_read_word_data,
    43	};
    44	
    45	static int pm6764tr_probe(struct i2c_client *client,
    46				  const struct i2c_device_id *id)
    47	{
  > 48		return pmbus_do_probe(client, id, &pm6764tr_info);
    49	}
    50	
    51	static const struct i2c_device_id pm6764tr_id[] = {
    52		{"pm6764tr", 0},
    53		{}
    54	};
    55	MODULE_DEVICE_TABLE(i2c, pm6764tr_id);
    56	
    57	static const struct of_device_id pm6764tr_of_match[] = {
    58		{.compatible = "st,pm6764tr"},
    59		{}
    60	};
    61	
    62	/* This is the driver that will be inserted */
    63	static struct i2c_driver pm6764tr_driver = {
    64		.driver = {
    65			   .name = "pm6764tr",
    66			   .of_match_table = of_match_ptr(pm6764tr_of_match),
    67			   },
  > 68		.probe_new = pm6764tr_probe,
    69		.id_table = pm6764tr_id,
    70	};
    71	

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org

[-- Attachment #2: .config.gz --]
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Re: [PATCH v6] hwmon: Add driver for STMicroelectronics PM6764 Voltage Regulator

[Guenter Roeck]

On Thu, Dec 03, 2020 at 01:30:30PM +0000, hsu.yungteng@outlook.com wrote:
> Add the pmbus driver for the STMicroelectronics pm6764 voltage regulator.
> 
> the output voltage use the MFR_READ_VOUT 0xD4
> vout value returned is linear11
> 

checkpatch --strict reports:

total: 3 errors, 7 warnings, 2 checks, 160 lines checked

This includes (again) "ERROR: patch seems to be corrupt",
as well as various formatting problems. Some of those
suggest more corruptions. As far as I can see, tabs were
replaced with spaces.

Guenter

> Signed-off-by: Charles Hsu <hsu.yungteng@gmail.com>
> ---
> v6:
>  - Fix misspelling.
> v5:
>  - Add MAINTAINERS.
>  - Add a reference into trivial-devices.yaml.
> v4:
>  - Add pm6764tr to Documentation/hwmon/index.rst.
> v3:
>  - Add Documentation(Documentation/hwmon/pm6764tr.rst).
>  - Fix include order.
> v2:
>  - Fix formatting.
>  - Remove pmbus_do_remove.
>  - Change from .probe to .probe_new.
> v1:
>  - Initial patchset.
> ---
>  Documentation/hwmon/index.rst    |  1 +
>  Documentation/hwmon/pm6764tr.rst | 32 ++++++++++++++
>  MAINTAINERS                      |  7 +++
>  drivers/hwmon/pmbus/Kconfig      |  9 ++++
>  drivers/hwmon/pmbus/Makefile     |  1 +
>  drivers/hwmon/pmbus/pm6764tr.c   | 76 ++++++++++++++++++++++++++++++++
>  6 files changed, 126 insertions(+)
>  create mode 100644 Documentation/hwmon/pm6764tr.rst
>  create mode 100644 drivers/hwmon/pmbus/pm6764tr.c
> 
> diff --git a/Documentation/hwmon/index.rst b/Documentation/hwmon/index.rst
> index b797db738225..1bbd05e41de4 100644
> --- a/Documentation/hwmon/index.rst
> +++ b/Documentation/hwmon/index.rst
> @@ -144,6 +144,7 @@ Hardware Monitoring Kernel Drivers
>     pc87360
>     pc87427
>     pcf8591
> +   pm6764tr
>     pmbus
>     powr1220
>     pxe1610
> diff --git a/Documentation/hwmon/pm6764tr.rst b/Documentation/hwmon/pm6764tr.rst
> new file mode 100644
> index 000000000000..a1fb8fea2326
> --- /dev/null
> +++ b/Documentation/hwmon/pm6764tr.rst
> @@ -0,0 +1,32 @@
> +.. SPDX-License-Identifier: GPL-2.0-only
> +
> +Kernel driver pm6764tr
> +======================
> +
> +Supported chips:
> +
> +  * ST PM6764TR
> +
> +    Prefix: 'pm6764tr'
> +
> +    Addresses scanned: -
> +
> +    Datasheet: http://www.st.com/resource/en/data_brief/pm6764.pdf
> +
> +Authors:
> +       <hsu.yungteng@gmail.com>
> +
> +Description:
> +------------
> +
> +This driver supports the STMicroelectronics PM6764TR chip. The PM6764TR is a high
> +performance digital controller designed to power Intel’s VR12.5 processors and memories.
> +
> +The device utilizes digital technology to implement all control and power management
> +functions to provide maximum flexibility and performance. The NVM is embedded to store
> +custom configurations. The PM6764TR device features up to 4-phase programmable operation.
> +
> +The PM6764TR supports power state transitions featuring VFDE, and programmable DPM
> +maintaining the best efficiency over all loading conditions without compromising transient
> +response. The device assures fast and independent protection against load overcurrent,
> +under/overvoltage and feedback disconnections.
> diff --git a/MAINTAINERS b/MAINTAINERS
> index 94ac10a153c7..a3fea132c4ed 100644
> --- a/MAINTAINERS
> +++ b/MAINTAINERS
> @@ -13904,6 +13904,13 @@ M:     Logan Gunthorpe <logang@deltatee.com>
>  S:      Maintained
>  F:      drivers/dma/plx_dma.c
>  
> +PM6764TR DRIVER
> +M:     Charles Hsu     <hsu.yungteng@gmail.com>
> +L:     linux-hwmon@vger.kernel.org
> +S:     Maintained
> +F:     Documentation/hwmon/pm6764tr.rst
> +F:     drivers/hwmon/pmbus/pm6764tr.c
> +
>  PM-GRAPH UTILITY
>  M:      "Todd E Brandt" <todd.e.brandt@linux.intel.com>
>  L:      linux-pm@vger.kernel.org
> diff --git a/drivers/hwmon/pmbus/Kconfig b/drivers/hwmon/pmbus/Kconfig
> index a25faf69fce3..9c846facce9f 100644
> --- a/drivers/hwmon/pmbus/Kconfig
> +++ b/drivers/hwmon/pmbus/Kconfig
> @@ -220,6 +220,15 @@ config SENSORS_MP2975
>            This driver can also be built as a module. If so, the module will
>            be called mp2975.
>  
> +config SENSORS_PM6764TR
> +       tristate "ST PM6764TR"
> +       help
> +         If you say yes here you get hardware monitoring support for ST
> +         PM6764TR.
> +
> +         This driver can also be built as a module. If so, the module will
> +         be called pm6764tr.
> +
>  config SENSORS_PXE1610
>          tristate "Infineon PXE1610"
>          help
> diff --git a/drivers/hwmon/pmbus/Makefile b/drivers/hwmon/pmbus/Makefile
> index 4c97ad0bd791..31ebdef5d4a6 100644
> --- a/drivers/hwmon/pmbus/Makefile
> +++ b/drivers/hwmon/pmbus/Makefile
> @@ -25,6 +25,7 @@ obj-$(CONFIG_SENSORS_MAX31785)        += max31785.o
>  obj-$(CONFIG_SENSORS_MAX34440)  += max34440.o
>  obj-$(CONFIG_SENSORS_MAX8688)   += max8688.o
>  obj-$(CONFIG_SENSORS_MP2975)    += mp2975.o
> +obj-$(CONFIG_SENSORS_PM6764TR) += pm6764tr.o
>  obj-$(CONFIG_SENSORS_PXE1610)   += pxe1610.o
>  obj-$(CONFIG_SENSORS_TPS40422)  += tps40422.o
>  obj-$(CONFIG_SENSORS_TPS53679)  += tps53679.o
> diff --git a/drivers/hwmon/pmbus/pm6764tr.c b/drivers/hwmon/pmbus/pm6764tr.c
> new file mode 100644
> index 000000000000..70747c21c66e
> --- /dev/null
> +++ b/drivers/hwmon/pmbus/pm6764tr.c
> @@ -0,0 +1,76 @@
> +// SPDX-License-Identifier: GPL-2.0+
> +/*
> + * Hardware monitoring driver for STMicroelectronics digital controller PM6764TR
> + */
> +
> +#include <linux/err.h>
> +#include <linux/i2c.h>
> +#include <linux/init.h>
> +#include <linux/kernel.h>
> +#include <linux/module.h>
> +#include <linux/pmbus.h>
> +#include "pmbus.h"
> +
> +#define PM6764TR_PMBUS_READ_VOUT       0xD4
> +
> +static int pm6764tr_read_word_data(struct i2c_client *client, int page, int reg)
> +{
> +       int ret;
> +
> +       switch (reg) {
> +       case PMBUS_VIRT_READ_VMON:
> +               ret = pmbus_read_word_data(client, page, PM6764TR_PMBUS_READ_VOUT);
> +               break;
> +       default:
> +               ret = -ENODATA;
> +               break;
> +       }
> +       return ret;
> +}
> +
> +static struct pmbus_driver_info pm6764tr_info = {
> +       .pages = 1,
> +       .format[PSC_VOLTAGE_IN] = linear,
> +       .format[PSC_VOLTAGE_OUT] = vid,
> +       .format[PSC_TEMPERATURE] = linear,
> +       .format[PSC_CURRENT_OUT] = linear,
> +       .format[PSC_POWER] = linear,
> +       .func[0] = PMBUS_HAVE_VIN | PMBUS_HAVE_IIN |  PMBUS_HAVE_PIN |
> +           PMBUS_HAVE_IOUT | PMBUS_HAVE_POUT | PMBUS_HAVE_VMON |
> +               PMBUS_HAVE_STATUS_IOUT | PMBUS_HAVE_STATUS_VOUT |
> +               PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP,
> +       .read_word_data = pm6764tr_read_word_data,
> +};
> +
> +static int pm6764tr_probe(struct i2c_client *client,
> +                         const struct i2c_device_id *id)
> +{
> +       return pmbus_do_probe(client, id, &pm6764tr_info);
> +}
> +
> +static const struct i2c_device_id pm6764tr_id[] = {
> +       {"pm6764tr", 0},
> +       {}
> +};
> +MODULE_DEVICE_TABLE(i2c, pm6764tr_id);
> +
> +static const struct of_device_id pm6764tr_of_match[] = {
> +       {.compatible = "st,pm6764tr"},
> +       {}
> +};
> +
> +/* This is the driver that will be inserted */
> +static struct i2c_driver pm6764tr_driver = {
> +       .driver = {
> +                  .name = "pm6764tr",
> +                  .of_match_table = of_match_ptr(pm6764tr_of_match),
> +                  },
> +       .probe_new = pm6764tr_probe,
> +       .id_table = pm6764tr_id,
> +};
> +
> +module_i2c_driver(pm6764tr_driver);
> +
> +MODULE_AUTHOR("Charles Hsu");
> +MODULE_DESCRIPTION("PMBus driver for  ST PM6764TR");
> +MODULE_LICENSE("GPL");
> --
> 2.25.1

Re: [PATCH v6] hwmon: Add driver for STMicroelectronics PM6764 Voltage Regulator

[Guenter Roeck]

On Thu, Dec 03, 2020 at 08:34:32PM +0800, Charles wrote:
[ ... ]
> 
> It's really weird. I sent a mail to myself, and it looks good.
> @@ -220,6 +220,15 @@ config SENSORS_MP2975
>  	  This driver can also be built as a module. If so, the module will
>  	  be called mp2975.
> +config SENSORS_PM6764TR
> 
But the above doesn't look good. The empty line is again missing.
It looks like your e-mail system manipulates/modifies the message
and removes that line.

> I have applied my patch with "git am", and it did work.
> Applying: Add-driver-for-STMicroelectronics-PM6764-Voltage-Regulator
> 
> I think I should use another e-mail system.

That may be a good idea. FWIW, I use msmtp, and git send-email.

Thanks,
Guenter

Re: [PATCH v6] hwmon: Add driver for STMicroelectronics PM6764 Voltage Regulator

[Charles]

On 3/12/2020 下午11:48, Guenter Roeck wrote:
> On Thu, Dec 03, 2020 at 08:34:32PM +0800, Charles wrote:
> [ ... ]
>> It's really weird. I sent a mail to myself, and it looks good.
>> @@ -220,6 +220,15 @@ config SENSORS_MP2975
>>   	  This driver can also be built as a module. If so, the module will
>>   	  be called mp2975.
>> +config SENSORS_PM6764TR
>>
> But the above doesn't look good. The empty line is again missing.
> It looks like your e-mail system manipulates/modifies the message
> and removes that line.
>
>> I have applied my patch with "git am", and it did work.
>> Applying: Add-driver-for-STMicroelectronics-PM6764-Voltage-Regulator
>>
>> I think I should use another e-mail system.
> That may be a good idea. FWIW, I use msmtp, and git send-email.
>
> Thanks,
> Guenter

I will try this way to send my patch, thank you.

Charles