* [PATCH v4 0/3] hwmon: add initial NXP MC34VR500 PMIC monitoring support
@ 2023-01-18 12:30 Mario Kicherer
2023-01-18 12:30 ` [PATCH v4 1/3] dt-bindings: hwmon: add nxp,mc34vr500 Mario Kicherer
` (2 more replies)
0 siblings, 3 replies; 8+ messages in thread
From: Mario Kicherer @ 2023-01-18 12:30 UTC (permalink / raw)
To: linux-hwmon
Cc: jdelvare, linux, robh+dt, krzysztof.kozlowski+dt, corbet,
linux-doc, devicetree, Mario Kicherer
Add initial monitoring support for the MC34VR500 PMIC. In its current
state, input voltage and temperature alarms are reported to hwmon.
Changes since v3:
- added specific #includes
- use INTSENSE0 instead of INTSTAT0 register to query alarm status
- abort probe if hwmon_device_register fails
- fixed interrupt clear and unmask
- added device tree match id
- removed client from struct mc34vr500_data
- fixed commit messages
- fixed filename and node name in dtbinding
Changes since v2:
- split documentation and dt-bindings patch
Changes since v1:
- included required #defines directly in the C file
- removed separate header file
- removed #defines for unimplemented sensors
- removed error log output
- use hwmon_device_register_with_info API
- cleaned probe function
Mario Kicherer (3):
dt-bindings: hwmon: add nxp,mc34vr500
docs: hwmon: add docs for the NXP MC34VR500 PMIC
hwmon: add initial NXP MC34VR500 PMIC monitoring support
.../bindings/hwmon/nxp,mc34vr500.yaml | 36 +++
Documentation/hwmon/mc34vr500.rst | 30 ++
drivers/hwmon/Kconfig | 7 +
drivers/hwmon/Makefile | 1 +
drivers/hwmon/mc34vr500.c | 262 ++++++++++++++++++
5 files changed, 336 insertions(+)
create mode 100644 Documentation/devicetree/bindings/hwmon/nxp,mc34vr500.yaml
create mode 100644 Documentation/hwmon/mc34vr500.rst
create mode 100644 drivers/hwmon/mc34vr500.c
--
2.34.1
^ permalink raw reply [flat|nested] 8+ messages in thread
* [PATCH v4 1/3] dt-bindings: hwmon: add nxp,mc34vr500
2023-01-18 12:30 [PATCH v4 0/3] hwmon: add initial NXP MC34VR500 PMIC monitoring support Mario Kicherer
@ 2023-01-18 12:30 ` Mario Kicherer
2023-01-19 11:42 ` Krzysztof Kozlowski
2023-01-24 13:56 ` Guenter Roeck
2023-01-18 12:30 ` [PATCH v4 2/3] docs: hwmon: add docs for the NXP MC34VR500 PMIC Mario Kicherer
2023-01-18 12:30 ` [PATCH v4 3/3] hwmon: add initial NXP MC34VR500 PMIC monitoring support Mario Kicherer
2 siblings, 2 replies; 8+ messages in thread
From: Mario Kicherer @ 2023-01-18 12:30 UTC (permalink / raw)
To: linux-hwmon
Cc: jdelvare, linux, robh+dt, krzysztof.kozlowski+dt, corbet,
linux-doc, devicetree, Mario Kicherer
Add dt-bindings for the NXP MC34VR500 PMIC.
Signed-off-by: Mario Kicherer <dev@kicherer.org>
---
.../bindings/hwmon/nxp,mc34vr500.yaml | 36 +++++++++++++++++++
1 file changed, 36 insertions(+)
create mode 100644 Documentation/devicetree/bindings/hwmon/nxp,mc34vr500.yaml
diff --git a/Documentation/devicetree/bindings/hwmon/nxp,mc34vr500.yaml b/Documentation/devicetree/bindings/hwmon/nxp,mc34vr500.yaml
new file mode 100644
index 000000000000..306f67315835
--- /dev/null
+++ b/Documentation/devicetree/bindings/hwmon/nxp,mc34vr500.yaml
@@ -0,0 +1,36 @@
+# SPDX-License-Identifier: GPL-2.0-only or BSD-2-Clause
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/hwmon/nxp,mc34vr500.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: NXP MC34VR500 hwmon sensor
+
+maintainers:
+ - Mario Kicherer <dev@kicherer.org>
+
+properties:
+ compatible:
+ enum:
+ - nxp,mc34vr500
+
+ reg:
+ maxItems: 1
+
+required:
+ - compatible
+ - reg
+
+additionalProperties: false
+
+examples:
+ - |
+ i2c {
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ pmic@8 {
+ compatible = "nxp,mc34vr500";
+ reg = <0x08>;
+ };
+ };
--
2.34.1
^ permalink raw reply related [flat|nested] 8+ messages in thread
* [PATCH v4 2/3] docs: hwmon: add docs for the NXP MC34VR500 PMIC
2023-01-18 12:30 [PATCH v4 0/3] hwmon: add initial NXP MC34VR500 PMIC monitoring support Mario Kicherer
2023-01-18 12:30 ` [PATCH v4 1/3] dt-bindings: hwmon: add nxp,mc34vr500 Mario Kicherer
@ 2023-01-18 12:30 ` Mario Kicherer
2023-01-24 13:59 ` Guenter Roeck
2023-01-18 12:30 ` [PATCH v4 3/3] hwmon: add initial NXP MC34VR500 PMIC monitoring support Mario Kicherer
2 siblings, 1 reply; 8+ messages in thread
From: Mario Kicherer @ 2023-01-18 12:30 UTC (permalink / raw)
To: linux-hwmon
Cc: jdelvare, linux, robh+dt, krzysztof.kozlowski+dt, corbet,
linux-doc, devicetree, Mario Kicherer
[-- Warning: decoded text below may be mangled, UTF-8 assumed --]
[-- Attachment #1: Type: text/plain; charset=y, Size: 1403 bytes --]
Add documentation for the NXP MC34VR500 PMIC.
Signed-off-by: Mario Kicherer <dev@kicherer.org>
---
Documentation/hwmon/mc34vr500.rst | 30 ++++++++++++++++++++++++++++++
1 file changed, 30 insertions(+)
create mode 100644 Documentation/hwmon/mc34vr500.rst
diff --git a/Documentation/hwmon/mc34vr500.rst b/Documentation/hwmon/mc34vr500.rst
new file mode 100644
index 000000000000..c9e3b44fb04f
--- /dev/null
+++ b/Documentation/hwmon/mc34vr500.rst
@@ -0,0 +1,30 @@
+Kernel driver mc34vr500
+=======================
+
+Supported Chips:
+
+ * NXP MC34VR500
+
+ Prefix: 'mc34vr500'
+
+ Datasheet: https://www.nxp.com/docs/en/data-sheet/MC34VR500.pdf
+
+Author: Mario Kicherer <dev@kicherer.org>
+
+Description
+-----------
+
+This driver implements initial support for the NXP MC34VR500 PMIC. The MC34VR500
+monitors the temperature, input voltage and output currents and provides
+corresponding alarms. For the temperature, the chip can send interrupts if
+the temperature rises above one of the following values: 110°, 120°, 125° and
+130° Celsius. For the input voltage, an interrupt is sent when the voltage
+drops below 2.8V.
+
+Currently, this driver only implements the input voltage and temperature
+alarms. The interrupts are mapped as follows:
+
+<= 2.8V -> in0_min_alarm
+>110°c -> temp1_max_alarm
+>120°c -> temp1_crit_alarm
+>130°c -> temp1_emergency_alarm
--
2.34.1
^ permalink raw reply related [flat|nested] 8+ messages in thread
* [PATCH v4 3/3] hwmon: add initial NXP MC34VR500 PMIC monitoring support
2023-01-18 12:30 [PATCH v4 0/3] hwmon: add initial NXP MC34VR500 PMIC monitoring support Mario Kicherer
2023-01-18 12:30 ` [PATCH v4 1/3] dt-bindings: hwmon: add nxp,mc34vr500 Mario Kicherer
2023-01-18 12:30 ` [PATCH v4 2/3] docs: hwmon: add docs for the NXP MC34VR500 PMIC Mario Kicherer
@ 2023-01-18 12:30 ` Mario Kicherer
2023-01-24 14:00 ` Guenter Roeck
2 siblings, 1 reply; 8+ messages in thread
From: Mario Kicherer @ 2023-01-18 12:30 UTC (permalink / raw)
To: linux-hwmon
Cc: jdelvare, linux, robh+dt, krzysztof.kozlowski+dt, corbet,
linux-doc, devicetree, Mario Kicherer
Add initial monitoring support for the MC34VR500 PMIC. In its current
state, input voltage and temperature alarms are reported to hwmon.
Datasheet:
- https://www.nxp.com/docs/en/data-sheet/MC34VR500.pdf
Signed-off-by: Mario Kicherer <dev@kicherer.org>
---
drivers/hwmon/Kconfig | 7 +
drivers/hwmon/Makefile | 1 +
drivers/hwmon/mc34vr500.c | 262 ++++++++++++++++++++++++++++++++++++++
3 files changed, 270 insertions(+)
create mode 100644 drivers/hwmon/mc34vr500.c
diff --git a/drivers/hwmon/Kconfig b/drivers/hwmon/Kconfig
index 3176c33af6c6..69d4c1609494 100644
--- a/drivers/hwmon/Kconfig
+++ b/drivers/hwmon/Kconfig
@@ -1166,6 +1166,13 @@ config SENSORS_MAX31790
This driver can also be built as a module. If so, the module
will be called max31790.
+config SENSORS_MC34VR500
+ tristate "NXP MC34VR500 hardware monitoring driver"
+ depends on I2C
+ help
+ If you say yes here you get support for the temperature and input
+ voltage sensors of the NXP MC34VR500.
+
config SENSORS_MCP3021
tristate "Microchip MCP3021 and compatibles"
depends on I2C
diff --git a/drivers/hwmon/Makefile b/drivers/hwmon/Makefile
index e2e4e87b282f..4bef13d16c66 100644
--- a/drivers/hwmon/Makefile
+++ b/drivers/hwmon/Makefile
@@ -149,6 +149,7 @@ obj-$(CONFIG_SENSORS_MAX6650) += max6650.o
obj-$(CONFIG_SENSORS_MAX6697) += max6697.o
obj-$(CONFIG_SENSORS_MAX31790) += max31790.o
obj-$(CONFIG_SENSORS_MC13783_ADC)+= mc13783-adc.o
+obj-$(CONFIG_SENSORS_MC34VR500) += mc34vr500.o
obj-$(CONFIG_SENSORS_MCP3021) += mcp3021.o
obj-$(CONFIG_SENSORS_TC654) += tc654.o
obj-$(CONFIG_SENSORS_TPS23861) += tps23861.o
diff --git a/drivers/hwmon/mc34vr500.c b/drivers/hwmon/mc34vr500.c
new file mode 100644
index 000000000000..b14daa999a2e
--- /dev/null
+++ b/drivers/hwmon/mc34vr500.c
@@ -0,0 +1,262 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * An hwmon driver for the NXP MC34VR500 PMIC
+ *
+ * Author: Mario Kicherer <dev@kicherer.org>
+ */
+
+#include <linux/bits.h>
+#include <linux/dev_printk.h>
+#include <linux/device.h>
+#include <linux/err.h>
+#include <linux/errno.h>
+#include <linux/hwmon.h>
+#include <linux/i2c.h>
+#include <linux/interrupt.h>
+#include <linux/irqreturn.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/regmap.h>
+
+#define MC34VR500_I2C_ADDR 0x08
+#define MC34VR500_DEVICEID_VALUE 0x14
+
+/* INTSENSE0 */
+#define ENS_BIT BIT(0)
+#define LOWVINS_BIT BIT(1)
+#define THERM110S_BIT BIT(2)
+#define THERM120S_BIT BIT(3)
+#define THERM125S_BIT BIT(4)
+#define THERM130S_BIT BIT(5)
+
+#define MC34VR500_DEVICEID 0x00
+
+#define MC34VR500_SILICONREVID 0x03
+#define MC34VR500_FABID 0x04
+#define MC34VR500_INTSTAT0 0x05
+#define MC34VR500_INTMASK0 0x06
+#define MC34VR500_INTSENSE0 0x07
+
+struct mc34vr500_data {
+ struct device *hwmon_dev;
+ struct regmap *regmap;
+};
+
+static irqreturn_t mc34vr500_process_interrupt(int irq, void *userdata)
+{
+ struct mc34vr500_data *data = (struct mc34vr500_data *)userdata;
+ unsigned int reg;
+ int ret;
+
+ ret = regmap_read(data->regmap, MC34VR500_INTSTAT0, ®);
+ if (ret < 0)
+ return IRQ_HANDLED;
+
+ if (reg) {
+ if (reg & LOWVINS_BIT)
+ hwmon_notify_event(data->hwmon_dev, hwmon_in,
+ hwmon_in_min_alarm, 0);
+
+ if (reg & THERM110S_BIT)
+ hwmon_notify_event(data->hwmon_dev, hwmon_temp,
+ hwmon_temp_max_alarm, 0);
+
+ if (reg & THERM120S_BIT)
+ hwmon_notify_event(data->hwmon_dev, hwmon_temp,
+ hwmon_temp_crit_alarm, 0);
+
+ if (reg & THERM130S_BIT)
+ hwmon_notify_event(data->hwmon_dev, hwmon_temp,
+ hwmon_temp_emergency_alarm, 0);
+
+ /* write 1 to clear */
+ regmap_write(data->regmap, MC34VR500_INTSTAT0, LOWVINS_BIT |
+ THERM110S_BIT | THERM120S_BIT | THERM130S_BIT);
+ }
+
+ return IRQ_HANDLED;
+}
+
+static umode_t mc34vr500_is_visible(const void *data,
+ enum hwmon_sensor_types type,
+ u32 attr, int channel)
+{
+ switch (attr) {
+ case hwmon_in_min_alarm:
+ case hwmon_temp_max_alarm:
+ case hwmon_temp_crit_alarm:
+ case hwmon_temp_emergency_alarm:
+ return 0444;
+ default:
+ break;
+ }
+
+ return 0;
+}
+
+static int mc34vr500_alarm_read(struct mc34vr500_data *data, int index,
+ long *val)
+{
+ unsigned int reg;
+ int ret;
+
+ ret = regmap_read(data->regmap, MC34VR500_INTSENSE0, ®);
+ if (ret < 0)
+ return ret;
+
+ *val = !!(reg & index);
+
+ return 0;
+}
+
+static int mc34vr500_read(struct device *dev, enum hwmon_sensor_types type,
+ u32 attr, int channel, long *val)
+{
+ struct mc34vr500_data *data = dev_get_drvdata(dev);
+
+ switch (type) {
+ case hwmon_in:
+ switch (attr) {
+ case hwmon_in_min_alarm:
+ return mc34vr500_alarm_read(data, LOWVINS_BIT, val);
+ default:
+ return -EOPNOTSUPP;
+ }
+ case hwmon_temp:
+ switch (attr) {
+ case hwmon_temp_max_alarm:
+ return mc34vr500_alarm_read(data, THERM110S_BIT, val);
+ case hwmon_temp_crit_alarm:
+ return mc34vr500_alarm_read(data, THERM120S_BIT, val);
+ case hwmon_temp_emergency_alarm:
+ return mc34vr500_alarm_read(data, THERM130S_BIT, val);
+ default:
+ return -EOPNOTSUPP;
+ }
+ default:
+ return -EOPNOTSUPP;
+ }
+}
+
+static const struct hwmon_channel_info *mc34vr500_info[] = {
+ HWMON_CHANNEL_INFO(in, HWMON_I_MIN_ALARM),
+ HWMON_CHANNEL_INFO(temp, HWMON_T_MAX_ALARM | HWMON_T_CRIT_ALARM
+ | HWMON_T_EMERGENCY_ALARM),
+ NULL,
+};
+
+static const struct hwmon_ops mc34vr500_hwmon_ops = {
+ .is_visible = mc34vr500_is_visible,
+ .read = mc34vr500_read,
+};
+
+static const struct hwmon_chip_info mc34vr500_chip_info = {
+ .ops = &mc34vr500_hwmon_ops,
+ .info = mc34vr500_info,
+};
+
+static const struct regmap_config mc34vr500_regmap_config = {
+ .reg_bits = 8,
+ .val_bits = 8,
+ .max_register = MC34VR500_INTSENSE0,
+};
+
+static int mc34vr500_probe(struct i2c_client *client)
+{
+ struct device *dev = &client->dev;
+ struct mc34vr500_data *data;
+ struct device *hwmon_dev;
+ int ret;
+ unsigned int reg, revid, fabid;
+ struct regmap *regmap;
+
+ regmap = devm_regmap_init_i2c(client, &mc34vr500_regmap_config);
+ if (IS_ERR(regmap))
+ return PTR_ERR(regmap);
+
+ data = devm_kzalloc(dev, sizeof(struct mc34vr500_data), GFP_KERNEL);
+ if (!data)
+ return -ENOMEM;
+
+ data->regmap = regmap;
+
+ ret = regmap_read(regmap, MC34VR500_DEVICEID, ®);
+ if (ret < 0)
+ return ret;
+
+ if (reg != MC34VR500_DEVICEID_VALUE)
+ return -ENODEV;
+
+ ret = regmap_read(regmap, MC34VR500_SILICONREVID, &revid);
+ if (ret < 0)
+ return ret;
+
+ ret = regmap_read(regmap, MC34VR500_FABID, &fabid);
+ if (ret < 0)
+ return ret;
+
+ dev_dbg(dev, "mc34vr500: revid 0x%x fabid 0x%x\n", revid, fabid);
+
+ hwmon_dev = devm_hwmon_device_register_with_info(dev, client->name,
+ data,
+ &mc34vr500_chip_info,
+ NULL);
+ if (IS_ERR(hwmon_dev))
+ return PTR_ERR(hwmon_dev);
+
+ data->hwmon_dev = hwmon_dev;
+
+ if (client->irq) {
+ ret = devm_request_threaded_irq(dev, client->irq, NULL,
+ mc34vr500_process_interrupt,
+ IRQF_TRIGGER_RISING |
+ IRQF_ONESHOT |
+ IRQF_SHARED,
+ dev_name(dev), data);
+ if (ret)
+ return ret;
+
+ /* write 1 to clear interrupts */
+ ret = regmap_write(regmap, MC34VR500_INTSTAT0, LOWVINS_BIT |
+ THERM110S_BIT | THERM120S_BIT |
+ THERM130S_BIT);
+ if (ret)
+ return ret;
+
+ /* unmask interrupts */
+ ret = regmap_write(regmap, MC34VR500_INTMASK0,
+ ~(LOWVINS_BIT | THERM110S_BIT |
+ THERM120S_BIT | THERM130S_BIT));
+ if (ret)
+ return ret;
+ }
+
+ return 0;
+}
+
+static const struct i2c_device_id mc34vr500_id[] = {
+ { "mc34vr500", 0 },
+};
+
+MODULE_DEVICE_TABLE(i2c, mc34vr500_id);
+
+static const struct of_device_id __maybe_unused mc34vr500_of_match[] = {
+ { .compatible = "nxp,mc34vr500" },
+};
+MODULE_DEVICE_TABLE(of, mc34vr500_of_match);
+
+static struct i2c_driver mc34vr500_driver = {
+ .driver = {
+ .name = "mc34vr500",
+ .of_match_table = of_match_ptr(mc34vr500_of_match),
+ },
+ .probe_new = mc34vr500_probe,
+ .id_table = mc34vr500_id,
+};
+
+module_i2c_driver(mc34vr500_driver);
+
+MODULE_AUTHOR("Mario Kicherer <dev@kicherer.org>");
+
+MODULE_DESCRIPTION("MC34VR500 driver");
+MODULE_LICENSE("GPL");
--
2.34.1
^ permalink raw reply related [flat|nested] 8+ messages in thread
* Re: [PATCH v4 1/3] dt-bindings: hwmon: add nxp,mc34vr500
2023-01-18 12:30 ` [PATCH v4 1/3] dt-bindings: hwmon: add nxp,mc34vr500 Mario Kicherer
@ 2023-01-19 11:42 ` Krzysztof Kozlowski
2023-01-24 13:56 ` Guenter Roeck
1 sibling, 0 replies; 8+ messages in thread
From: Krzysztof Kozlowski @ 2023-01-19 11:42 UTC (permalink / raw)
To: Mario Kicherer, linux-hwmon
Cc: jdelvare, linux, robh+dt, krzysztof.kozlowski+dt, corbet,
linux-doc, devicetree
On 18/01/2023 13:30, Mario Kicherer wrote:
> Add dt-bindings for the NXP MC34VR500 PMIC.
>
> Signed-off-by: Mario Kicherer <dev@kicherer.org>
> ---
> .../bindings/hwmon/nxp,mc34vr500.yaml | 36 +++++++++++++++++++
> 1 file changed, 36 insertions(+)
> create mode 100644 Documentation/devicetree/bindings/hwmon/nxp,mc34vr500.yaml
>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Best regards,
Krzysztof
^ permalink raw reply [flat|nested] 8+ messages in thread
* Re: [PATCH v4 1/3] dt-bindings: hwmon: add nxp,mc34vr500
2023-01-18 12:30 ` [PATCH v4 1/3] dt-bindings: hwmon: add nxp,mc34vr500 Mario Kicherer
2023-01-19 11:42 ` Krzysztof Kozlowski
@ 2023-01-24 13:56 ` Guenter Roeck
1 sibling, 0 replies; 8+ messages in thread
From: Guenter Roeck @ 2023-01-24 13:56 UTC (permalink / raw)
To: Mario Kicherer
Cc: linux-hwmon, jdelvare, robh+dt, krzysztof.kozlowski+dt, corbet,
linux-doc, devicetree
On Wed, Jan 18, 2023 at 01:30:17PM +0100, Mario Kicherer wrote:
> Add dt-bindings for the NXP MC34VR500 PMIC.
>
> Signed-off-by: Mario Kicherer <dev@kicherer.org>
> Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Applied th hwmon-next.
Thanks,
Guenter
> ---
> .../bindings/hwmon/nxp,mc34vr500.yaml | 36 +++++++++++++++++++
> 1 file changed, 36 insertions(+)
> create mode 100644 Documentation/devicetree/bindings/hwmon/nxp,mc34vr500.yaml
>
> diff --git a/Documentation/devicetree/bindings/hwmon/nxp,mc34vr500.yaml b/Documentation/devicetree/bindings/hwmon/nxp,mc34vr500.yaml
> new file mode 100644
> index 000000000000..306f67315835
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/hwmon/nxp,mc34vr500.yaml
> @@ -0,0 +1,36 @@
> +# SPDX-License-Identifier: GPL-2.0-only or BSD-2-Clause
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/hwmon/nxp,mc34vr500.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: NXP MC34VR500 hwmon sensor
> +
> +maintainers:
> + - Mario Kicherer <dev@kicherer.org>
> +
> +properties:
> + compatible:
> + enum:
> + - nxp,mc34vr500
> +
> + reg:
> + maxItems: 1
> +
> +required:
> + - compatible
> + - reg
> +
> +additionalProperties: false
> +
> +examples:
> + - |
> + i2c {
> + #address-cells = <1>;
> + #size-cells = <0>;
> +
> + pmic@8 {
> + compatible = "nxp,mc34vr500";
> + reg = <0x08>;
> + };
> + };
^ permalink raw reply [flat|nested] 8+ messages in thread
* Re: [PATCH v4 2/3] docs: hwmon: add docs for the NXP MC34VR500 PMIC
2023-01-18 12:30 ` [PATCH v4 2/3] docs: hwmon: add docs for the NXP MC34VR500 PMIC Mario Kicherer
@ 2023-01-24 13:59 ` Guenter Roeck
0 siblings, 0 replies; 8+ messages in thread
From: Guenter Roeck @ 2023-01-24 13:59 UTC (permalink / raw)
To: Mario Kicherer
Cc: linux-hwmon, jdelvare, robh+dt, krzysztof.kozlowski+dt, corbet,
linux-doc, devicetree
On Wed, Jan 18, 2023 at 01:30:18PM +0100, Mario Kicherer wrote:
> Add documentation for the NXP MC34VR500 PMIC.
>
> Signed-off-by: Mario Kicherer <dev@kicherer.org>
Checkpatch notes that the SPDX license identifier is missing.
I copied the one from the source (SPDX-License-Identifier:
GPL-2.0-or-later). If this is not what you want, please let me know
and/or resubmit with the desired license identifier.
Thanks,
Guenter
> ---
> Documentation/hwmon/mc34vr500.rst | 30 ++++++++++++++++++++++++++++++
> 1 file changed, 30 insertions(+)
> create mode 100644 Documentation/hwmon/mc34vr500.rst
>
> diff --git a/Documentation/hwmon/mc34vr500.rst b/Documentation/hwmon/mc34vr500.rst
> new file mode 100644
> index 000000000000..c9e3b44fb04f
> --- /dev/null
> +++ b/Documentation/hwmon/mc34vr500.rst
> @@ -0,0 +1,30 @@
> +Kernel driver mc34vr500
> +=======================
> +
> +Supported Chips:
> +
> + * NXP MC34VR500
> +
> + Prefix: 'mc34vr500'
> +
> + Datasheet: https://www.nxp.com/docs/en/data-sheet/MC34VR500.pdf
> +
> +Author: Mario Kicherer <dev@kicherer.org>
> +
> +Description
> +-----------
> +
> +This driver implements initial support for the NXP MC34VR500 PMIC. The MC34VR500
> +monitors the temperature, input voltage and output currents and provides
> +corresponding alarms. For the temperature, the chip can send interrupts if
> +the temperature rises above one of the following values: 110°, 120°, 125° and
> +130° Celsius. For the input voltage, an interrupt is sent when the voltage
> +drops below 2.8V.
> +
> +Currently, this driver only implements the input voltage and temperature
> +alarms. The interrupts are mapped as follows:
> +
> +<= 2.8V -> in0_min_alarm
> +>110°c -> temp1_max_alarm
> +>120°c -> temp1_crit_alarm
> +>130°c -> temp1_emergency_alarm
^ permalink raw reply [flat|nested] 8+ messages in thread
* Re: [PATCH v4 3/3] hwmon: add initial NXP MC34VR500 PMIC monitoring support
2023-01-18 12:30 ` [PATCH v4 3/3] hwmon: add initial NXP MC34VR500 PMIC monitoring support Mario Kicherer
@ 2023-01-24 14:00 ` Guenter Roeck
0 siblings, 0 replies; 8+ messages in thread
From: Guenter Roeck @ 2023-01-24 14:00 UTC (permalink / raw)
To: Mario Kicherer
Cc: linux-hwmon, jdelvare, robh+dt, krzysztof.kozlowski+dt, corbet,
linux-doc, devicetree
On Wed, Jan 18, 2023 at 01:30:19PM +0100, Mario Kicherer wrote:
> Add initial monitoring support for the MC34VR500 PMIC. In its current
> state, input voltage and temperature alarms are reported to hwmon.
>
> Datasheet:
> - https://www.nxp.com/docs/en/data-sheet/MC34VR500.pdf
>
> Signed-off-by: Mario Kicherer <dev@kicherer.org>
Applied to hwmon-next.
Thanks,
Guenter
> ---
> drivers/hwmon/Kconfig | 7 +
> drivers/hwmon/Makefile | 1 +
> drivers/hwmon/mc34vr500.c | 262 ++++++++++++++++++++++++++++++++++++++
> 3 files changed, 270 insertions(+)
> create mode 100644 drivers/hwmon/mc34vr500.c
>
> diff --git a/drivers/hwmon/Kconfig b/drivers/hwmon/Kconfig
> index 3176c33af6c6..69d4c1609494 100644
> --- a/drivers/hwmon/Kconfig
> +++ b/drivers/hwmon/Kconfig
> @@ -1166,6 +1166,13 @@ config SENSORS_MAX31790
> This driver can also be built as a module. If so, the module
> will be called max31790.
>
> +config SENSORS_MC34VR500
> + tristate "NXP MC34VR500 hardware monitoring driver"
> + depends on I2C
> + help
> + If you say yes here you get support for the temperature and input
> + voltage sensors of the NXP MC34VR500.
> +
> config SENSORS_MCP3021
> tristate "Microchip MCP3021 and compatibles"
> depends on I2C
> diff --git a/drivers/hwmon/Makefile b/drivers/hwmon/Makefile
> index e2e4e87b282f..4bef13d16c66 100644
> --- a/drivers/hwmon/Makefile
> +++ b/drivers/hwmon/Makefile
> @@ -149,6 +149,7 @@ obj-$(CONFIG_SENSORS_MAX6650) += max6650.o
> obj-$(CONFIG_SENSORS_MAX6697) += max6697.o
> obj-$(CONFIG_SENSORS_MAX31790) += max31790.o
> obj-$(CONFIG_SENSORS_MC13783_ADC)+= mc13783-adc.o
> +obj-$(CONFIG_SENSORS_MC34VR500) += mc34vr500.o
> obj-$(CONFIG_SENSORS_MCP3021) += mcp3021.o
> obj-$(CONFIG_SENSORS_TC654) += tc654.o
> obj-$(CONFIG_SENSORS_TPS23861) += tps23861.o
> diff --git a/drivers/hwmon/mc34vr500.c b/drivers/hwmon/mc34vr500.c
> new file mode 100644
> index 000000000000..b14daa999a2e
> --- /dev/null
> +++ b/drivers/hwmon/mc34vr500.c
> @@ -0,0 +1,262 @@
> +// SPDX-License-Identifier: GPL-2.0-or-later
> +/*
> + * An hwmon driver for the NXP MC34VR500 PMIC
> + *
> + * Author: Mario Kicherer <dev@kicherer.org>
> + */
> +
> +#include <linux/bits.h>
> +#include <linux/dev_printk.h>
> +#include <linux/device.h>
> +#include <linux/err.h>
> +#include <linux/errno.h>
> +#include <linux/hwmon.h>
> +#include <linux/i2c.h>
> +#include <linux/interrupt.h>
> +#include <linux/irqreturn.h>
> +#include <linux/module.h>
> +#include <linux/of.h>
> +#include <linux/regmap.h>
> +
> +#define MC34VR500_I2C_ADDR 0x08
> +#define MC34VR500_DEVICEID_VALUE 0x14
> +
> +/* INTSENSE0 */
> +#define ENS_BIT BIT(0)
> +#define LOWVINS_BIT BIT(1)
> +#define THERM110S_BIT BIT(2)
> +#define THERM120S_BIT BIT(3)
> +#define THERM125S_BIT BIT(4)
> +#define THERM130S_BIT BIT(5)
> +
> +#define MC34VR500_DEVICEID 0x00
> +
> +#define MC34VR500_SILICONREVID 0x03
> +#define MC34VR500_FABID 0x04
> +#define MC34VR500_INTSTAT0 0x05
> +#define MC34VR500_INTMASK0 0x06
> +#define MC34VR500_INTSENSE0 0x07
> +
> +struct mc34vr500_data {
> + struct device *hwmon_dev;
> + struct regmap *regmap;
> +};
> +
> +static irqreturn_t mc34vr500_process_interrupt(int irq, void *userdata)
> +{
> + struct mc34vr500_data *data = (struct mc34vr500_data *)userdata;
> + unsigned int reg;
> + int ret;
> +
> + ret = regmap_read(data->regmap, MC34VR500_INTSTAT0, ®);
> + if (ret < 0)
> + return IRQ_HANDLED;
> +
> + if (reg) {
> + if (reg & LOWVINS_BIT)
> + hwmon_notify_event(data->hwmon_dev, hwmon_in,
> + hwmon_in_min_alarm, 0);
> +
> + if (reg & THERM110S_BIT)
> + hwmon_notify_event(data->hwmon_dev, hwmon_temp,
> + hwmon_temp_max_alarm, 0);
> +
> + if (reg & THERM120S_BIT)
> + hwmon_notify_event(data->hwmon_dev, hwmon_temp,
> + hwmon_temp_crit_alarm, 0);
> +
> + if (reg & THERM130S_BIT)
> + hwmon_notify_event(data->hwmon_dev, hwmon_temp,
> + hwmon_temp_emergency_alarm, 0);
> +
> + /* write 1 to clear */
> + regmap_write(data->regmap, MC34VR500_INTSTAT0, LOWVINS_BIT |
> + THERM110S_BIT | THERM120S_BIT | THERM130S_BIT);
> + }
> +
> + return IRQ_HANDLED;
> +}
> +
> +static umode_t mc34vr500_is_visible(const void *data,
> + enum hwmon_sensor_types type,
> + u32 attr, int channel)
> +{
> + switch (attr) {
> + case hwmon_in_min_alarm:
> + case hwmon_temp_max_alarm:
> + case hwmon_temp_crit_alarm:
> + case hwmon_temp_emergency_alarm:
> + return 0444;
> + default:
> + break;
> + }
> +
> + return 0;
> +}
> +
> +static int mc34vr500_alarm_read(struct mc34vr500_data *data, int index,
> + long *val)
> +{
> + unsigned int reg;
> + int ret;
> +
> + ret = regmap_read(data->regmap, MC34VR500_INTSENSE0, ®);
> + if (ret < 0)
> + return ret;
> +
> + *val = !!(reg & index);
> +
> + return 0;
> +}
> +
> +static int mc34vr500_read(struct device *dev, enum hwmon_sensor_types type,
> + u32 attr, int channel, long *val)
> +{
> + struct mc34vr500_data *data = dev_get_drvdata(dev);
> +
> + switch (type) {
> + case hwmon_in:
> + switch (attr) {
> + case hwmon_in_min_alarm:
> + return mc34vr500_alarm_read(data, LOWVINS_BIT, val);
> + default:
> + return -EOPNOTSUPP;
> + }
> + case hwmon_temp:
> + switch (attr) {
> + case hwmon_temp_max_alarm:
> + return mc34vr500_alarm_read(data, THERM110S_BIT, val);
> + case hwmon_temp_crit_alarm:
> + return mc34vr500_alarm_read(data, THERM120S_BIT, val);
> + case hwmon_temp_emergency_alarm:
> + return mc34vr500_alarm_read(data, THERM130S_BIT, val);
> + default:
> + return -EOPNOTSUPP;
> + }
> + default:
> + return -EOPNOTSUPP;
> + }
> +}
> +
> +static const struct hwmon_channel_info *mc34vr500_info[] = {
> + HWMON_CHANNEL_INFO(in, HWMON_I_MIN_ALARM),
> + HWMON_CHANNEL_INFO(temp, HWMON_T_MAX_ALARM | HWMON_T_CRIT_ALARM
> + | HWMON_T_EMERGENCY_ALARM),
> + NULL,
> +};
> +
> +static const struct hwmon_ops mc34vr500_hwmon_ops = {
> + .is_visible = mc34vr500_is_visible,
> + .read = mc34vr500_read,
> +};
> +
> +static const struct hwmon_chip_info mc34vr500_chip_info = {
> + .ops = &mc34vr500_hwmon_ops,
> + .info = mc34vr500_info,
> +};
> +
> +static const struct regmap_config mc34vr500_regmap_config = {
> + .reg_bits = 8,
> + .val_bits = 8,
> + .max_register = MC34VR500_INTSENSE0,
> +};
> +
> +static int mc34vr500_probe(struct i2c_client *client)
> +{
> + struct device *dev = &client->dev;
> + struct mc34vr500_data *data;
> + struct device *hwmon_dev;
> + int ret;
> + unsigned int reg, revid, fabid;
> + struct regmap *regmap;
> +
> + regmap = devm_regmap_init_i2c(client, &mc34vr500_regmap_config);
> + if (IS_ERR(regmap))
> + return PTR_ERR(regmap);
> +
> + data = devm_kzalloc(dev, sizeof(struct mc34vr500_data), GFP_KERNEL);
> + if (!data)
> + return -ENOMEM;
> +
> + data->regmap = regmap;
> +
> + ret = regmap_read(regmap, MC34VR500_DEVICEID, ®);
> + if (ret < 0)
> + return ret;
> +
> + if (reg != MC34VR500_DEVICEID_VALUE)
> + return -ENODEV;
> +
> + ret = regmap_read(regmap, MC34VR500_SILICONREVID, &revid);
> + if (ret < 0)
> + return ret;
> +
> + ret = regmap_read(regmap, MC34VR500_FABID, &fabid);
> + if (ret < 0)
> + return ret;
> +
> + dev_dbg(dev, "mc34vr500: revid 0x%x fabid 0x%x\n", revid, fabid);
> +
> + hwmon_dev = devm_hwmon_device_register_with_info(dev, client->name,
> + data,
> + &mc34vr500_chip_info,
> + NULL);
> + if (IS_ERR(hwmon_dev))
> + return PTR_ERR(hwmon_dev);
> +
> + data->hwmon_dev = hwmon_dev;
> +
> + if (client->irq) {
> + ret = devm_request_threaded_irq(dev, client->irq, NULL,
> + mc34vr500_process_interrupt,
> + IRQF_TRIGGER_RISING |
> + IRQF_ONESHOT |
> + IRQF_SHARED,
> + dev_name(dev), data);
> + if (ret)
> + return ret;
> +
> + /* write 1 to clear interrupts */
> + ret = regmap_write(regmap, MC34VR500_INTSTAT0, LOWVINS_BIT |
> + THERM110S_BIT | THERM120S_BIT |
> + THERM130S_BIT);
> + if (ret)
> + return ret;
> +
> + /* unmask interrupts */
> + ret = regmap_write(regmap, MC34VR500_INTMASK0,
> + ~(LOWVINS_BIT | THERM110S_BIT |
> + THERM120S_BIT | THERM130S_BIT));
> + if (ret)
> + return ret;
> + }
> +
> + return 0;
> +}
> +
> +static const struct i2c_device_id mc34vr500_id[] = {
> + { "mc34vr500", 0 },
> +};
> +
> +MODULE_DEVICE_TABLE(i2c, mc34vr500_id);
> +
> +static const struct of_device_id __maybe_unused mc34vr500_of_match[] = {
> + { .compatible = "nxp,mc34vr500" },
> +};
> +MODULE_DEVICE_TABLE(of, mc34vr500_of_match);
> +
> +static struct i2c_driver mc34vr500_driver = {
> + .driver = {
> + .name = "mc34vr500",
> + .of_match_table = of_match_ptr(mc34vr500_of_match),
> + },
> + .probe_new = mc34vr500_probe,
> + .id_table = mc34vr500_id,
> +};
> +
> +module_i2c_driver(mc34vr500_driver);
> +
> +MODULE_AUTHOR("Mario Kicherer <dev@kicherer.org>");
> +
> +MODULE_DESCRIPTION("MC34VR500 driver");
> +MODULE_LICENSE("GPL");
^ permalink raw reply [flat|nested] 8+ messages in thread
end of thread, other threads:[~2023-01-24 14:01 UTC | newest]
Thread overview: 8+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2023-01-18 12:30 [PATCH v4 0/3] hwmon: add initial NXP MC34VR500 PMIC monitoring support Mario Kicherer
2023-01-18 12:30 ` [PATCH v4 1/3] dt-bindings: hwmon: add nxp,mc34vr500 Mario Kicherer
2023-01-19 11:42 ` Krzysztof Kozlowski
2023-01-24 13:56 ` Guenter Roeck
2023-01-18 12:30 ` [PATCH v4 2/3] docs: hwmon: add docs for the NXP MC34VR500 PMIC Mario Kicherer
2023-01-24 13:59 ` Guenter Roeck
2023-01-18 12:30 ` [PATCH v4 3/3] hwmon: add initial NXP MC34VR500 PMIC monitoring support Mario Kicherer
2023-01-24 14:00 ` Guenter Roeck
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