From: "Opensource [Steve Twiss]" <[email protected]>
Dependencies required for DA9063 HWMON support.
Signed-off-by: Opensource [Steve Twiss] <[email protected]>
Directly set da9063->t_offset.
Let MFD probe succeed even if DA9063_REG_T_OFFSET cannot be read.
Signed-off-by: Vincent Pelletier <[email protected]>
---
Originally submitted by Steve Twiss in 2014:
https://marc.info/?l=linux-kernel&m=139560864709852&w=2
drivers/mfd/da9063-core.c | 8 ++++++++
include/linux/mfd/da9063/core.h | 3 +++
2 files changed, 11 insertions(+)
diff --git a/drivers/mfd/da9063-core.c b/drivers/mfd/da9063-core.c
index df407c3afce3..14c2a8df9ae3 100644
--- a/drivers/mfd/da9063-core.c
+++ b/drivers/mfd/da9063-core.c
@@ -197,6 +197,14 @@ int da9063_device_init(struct da9063 *da9063, unsigned int irq)
}
}
+ ret = regmap_read(da9063->regmap, DA9063_REG_T_OFFSET, &da9063->t_offset);
+ if (ret < 0) {
+ da9063->t_offset = 0;
+ dev_warn(da9063->dev,
+ "Temperature trimming value cannot be read (defaulting to 0)\n");
+ ret = 0;
+ }
+
return ret;
}
diff --git a/include/linux/mfd/da9063/core.h b/include/linux/mfd/da9063/core.h
index fa7a43f02f27..c0c57c6f6230 100644
--- a/include/linux/mfd/da9063/core.h
+++ b/include/linux/mfd/da9063/core.h
@@ -85,6 +85,9 @@ struct da9063 {
int chip_irq;
unsigned int irq_base;
struct regmap_irq_chip_data *regmap_irq;
+
+ /* Trimming */
+ int t_offset;
};
int da9063_device_init(struct da9063 *da9063, unsigned int irq);
--
2.32.0
From: "Opensource [Steve Twiss]" <[email protected]>
Add the HWMON driver for DA9063
Signed-off-by: Opensource [Steve Twiss] <[email protected]>
Simplify and modernise the code a bit.
Add minimal of_match_table.
Fix logic inversion in detecting conversion end.
Drop support for ADCIN: these are multi-purpose channels and must not
be reconfigured unless explicitly authorised by the board description.
Signed-off-by: Vincent Pelletier <[email protected]>
---
This patch depends on patch 1/3.
Originally submitted by Steve Twiss in 2014:
https://marc.info/?l=linux-kernel&m=139560868309857&w=2
drivers/hwmon/Kconfig | 10 +
drivers/hwmon/Makefile | 1 +
drivers/hwmon/da9063-hwmon.c | 287 +++++++++++++++++++++++++++
include/linux/mfd/da9063/registers.h | 34 ++++
4 files changed, 332 insertions(+)
create mode 100644 drivers/hwmon/da9063-hwmon.c
diff --git a/drivers/hwmon/Kconfig b/drivers/hwmon/Kconfig
index 87624902ea80..17244cfaa855 100644
--- a/drivers/hwmon/Kconfig
+++ b/drivers/hwmon/Kconfig
@@ -515,6 +515,16 @@ config SENSORS_DA9055
This driver can also be built as a module. If so, the module
will be called da9055-hwmon.
+config SENSORS_DA9063
+ tristate "Dialog Semiconductor DA9063"
+ depends on MFD_DA9063
+ help
+ If you say yes here you get support for the hardware
+ monitoring features of the DA9063 Power Management IC.
+
+ This driver can also be built as a module. If so, the module
+ will be called da9063-hwmon.
+
config SENSORS_I5K_AMB
tristate "FB-DIMM AMB temperature sensor on Intel 5000 series chipsets"
depends on PCI
diff --git a/drivers/hwmon/Makefile b/drivers/hwmon/Makefile
index 59e78bc212cf..6855711ed9ec 100644
--- a/drivers/hwmon/Makefile
+++ b/drivers/hwmon/Makefile
@@ -60,6 +60,7 @@ obj-$(CONFIG_SENSORS_CORSAIR_CPRO) += corsair-cpro.o
obj-$(CONFIG_SENSORS_CORSAIR_PSU) += corsair-psu.o
obj-$(CONFIG_SENSORS_DA9052_ADC)+= da9052-hwmon.o
obj-$(CONFIG_SENSORS_DA9055)+= da9055-hwmon.o
+obj-$(CONFIG_SENSORS_DA9063) += da9063-hwmon.o
obj-$(CONFIG_SENSORS_DELL_SMM) += dell-smm-hwmon.o
obj-$(CONFIG_SENSORS_DME1737) += dme1737.o
obj-$(CONFIG_SENSORS_DRIVETEMP) += drivetemp.o
diff --git a/drivers/hwmon/da9063-hwmon.c b/drivers/hwmon/da9063-hwmon.c
new file mode 100644
index 000000000000..35b5bb0290ca
--- /dev/null
+++ b/drivers/hwmon/da9063-hwmon.c
@@ -0,0 +1,287 @@
+/* da9063-hwmon.c - Hardware monitor support for DA9063
+ * Copyright (C) 2014 Dialog Semiconductor Ltd.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Library General Public License for more details.
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/err.h>
+#include <linux/delay.h>
+#include <linux/init.h>
+#include <linux/slab.h>
+#include <linux/string.h>
+#include <linux/platform_device.h>
+#include <linux/hwmon.h>
+#include <linux/hwmon-sysfs.h>
+#include <linux/regmap.h>
+#include <linux/mfd/da9063/core.h>
+#include <linux/mod_devicetable.h>
+
+#define DA9063_ADC_RES (1 << (DA9063_ADC_RES_L_BITS + DA9063_ADC_RES_M_BITS))
+#define DA9063_ADC_MAX (DA9063_ADC_RES - 1)
+#define DA9063_2V5 2500
+#define DA9063_5V0 5000
+#define DA9063_5V5 5500
+#define DA9063_TJUNC_M -398
+#define DA9063_TJUNC_O 330000
+#define DA9063_VBBAT_M 2048
+
+enum da9063_adc {
+ DA9063_CHAN_VSYS = DA9063_ADC_MUX_VSYS,
+ DA9063_CHAN_ADCIN1 = DA9063_ADC_MUX_ADCIN1,
+ DA9063_CHAN_ADCIN2 = DA9063_ADC_MUX_ADCIN2,
+ DA9063_CHAN_ADCIN3 = DA9063_ADC_MUX_ADCIN3,
+ DA9063_CHAN_TJUNC = DA9063_ADC_MUX_T_SENSE,
+ DA9063_CHAN_VBBAT = DA9063_ADC_MUX_VBBAT,
+ DA9063_CHAN_LDO_G1 = DA9063_ADC_MUX_LDO_G1,
+ DA9063_CHAN_LDO_G2 = DA9063_ADC_MUX_LDO_G2,
+ DA9063_CHAN_LDO_G3 = DA9063_ADC_MUX_LDO_G3
+};
+
+struct da9063_hwmon {
+ struct da9063 *da9063;
+ struct mutex hwmon_mutex;
+ struct completion adc_ready;
+ signed char tjunc_offset;
+};
+
+static int da9063_adc_convert(struct da9063_hwmon *hwmon, int channel,
+ int *value)
+{
+ int val = *value;
+ int ret = 0;
+
+ switch (channel) {
+ case DA9063_CHAN_VSYS:
+ val = ((DA9063_5V5 - DA9063_2V5) * val) / DA9063_ADC_MAX +
+ DA9063_2V5;
+ break;
+ case DA9063_CHAN_TJUNC:
+ val -= hwmon->tjunc_offset;
+ val = DA9063_TJUNC_M * val + DA9063_TJUNC_O;
+ break;
+ case DA9063_CHAN_VBBAT:
+ val = (DA9063_5V0 * val) / DA9063_ADC_MAX;
+ break;
+ default:
+ ret = -EINVAL;
+ goto err_convert;
+ }
+
+ *value = val;
+err_convert:
+ return ret;
+}
+
+
+static int da9063_adc_manual_read(struct da9063_hwmon *hwmon, int channel)
+{
+ int ret;
+ unsigned char val;
+ unsigned char data[2];
+ int adc_man;
+
+ mutex_lock(&hwmon->hwmon_mutex);
+
+ init_completion(&hwmon->adc_ready);
+
+ val = (channel & DA9063_ADC_MUX_MASK) | DA9063_ADC_MAN;
+ ret = regmap_update_bits(hwmon->da9063->regmap, DA9063_REG_ADC_MAN,
+ DA9063_ADC_MUX_MASK | DA9063_ADC_MAN, val);
+ if (ret < 0)
+ goto err_mread;
+
+ ret = wait_for_completion_timeout(&hwmon->adc_ready,
+ msecs_to_jiffies(1000));
+ if (ret == 0) {
+ ret = -ETIMEDOUT;
+ goto err_mread;
+ }
+
+ ret = regmap_read(hwmon->da9063->regmap, DA9063_REG_ADC_MAN, &adc_man);
+ if (ret < 0)
+ goto err_mread;
+
+ /* data value is not ready */
+ if (adc_man & DA9063_ADC_MAN) {
+ ret = -EINVAL;
+ goto err_mread;
+ }
+
+ ret = regmap_bulk_read(hwmon->da9063->regmap,
+ DA9063_REG_ADC_RES_L, data, 2);
+ if (ret < 0)
+ goto err_mread;
+
+ ret = (data[0] & DA9063_ADC_RES_L_MASK) >> DA9063_ADC_RES_L_SHIFT;
+ ret |= data[1] << DA9063_ADC_RES_L_BITS;
+err_mread:
+ mutex_unlock(&hwmon->hwmon_mutex);
+ return ret;
+}
+
+static irqreturn_t da9063_hwmon_irq_handler(int irq, void *irq_data)
+{
+ struct da9063_hwmon *hwmon = irq_data;
+ complete(&hwmon->adc_ready);
+ return IRQ_HANDLED;
+}
+
+static ssize_t da9063_adc_show(struct device *dev,
+ struct device_attribute *devattr, char *buf)
+{
+ struct da9063_hwmon *hwmon = dev_get_drvdata(dev);
+ int channel = to_sensor_dev_attr(devattr)->index;
+ int val;
+ int ret;
+
+ switch (channel) {
+ case DA9063_CHAN_VSYS:
+ case DA9063_CHAN_TJUNC:
+ case DA9063_CHAN_VBBAT:
+ /* fallthrough for internal measures */
+ val = da9063_adc_manual_read(hwmon, channel);
+ if (val < 0) {
+ dev_err(dev, "ADC read error %d\n", val);
+ return val;
+ }
+ break;
+
+ default:
+ /* error case */
+ ret = -EINVAL;
+ goto err_read;
+ }
+
+ ret = da9063_adc_convert(hwmon, channel, &val);
+ if (ret < 0) {
+ dev_err(dev, "Failed to convert ADC value %d\n", ret);
+ goto err_read;
+ }
+
+ return sprintf(buf, "%d\n", val);
+err_read:
+ return ret;
+}
+
+
+static ssize_t da9063_label_show(struct device *dev,
+ struct device_attribute *devattr, char *buf)
+{
+ int channel = to_sensor_dev_attr(devattr)->index;
+ char *label;
+
+ switch (channel) {
+ case DA9063_CHAN_VSYS:
+ label = "VSYS";
+ break;
+ case DA9063_CHAN_TJUNC:
+ label = "TJUNC";
+ break;
+ case DA9063_CHAN_VBBAT:
+ label = "VBBAT";
+ break;
+ default:
+ label = "UNKNOWN";
+ }
+
+ return sprintf(buf, "%s\n", label);
+}
+
+static SENSOR_DEVICE_ATTR_RO(in0_input,
+ da9063_adc, DA9063_CHAN_VSYS);
+static SENSOR_DEVICE_ATTR_RO(in0_label,
+ da9063_label, DA9063_CHAN_VSYS);
+
+static SENSOR_DEVICE_ATTR_RO(in4_input,
+ da9063_adc, DA9063_CHAN_VBBAT);
+static SENSOR_DEVICE_ATTR_RO(in4_label,
+ da9063_label, DA9063_CHAN_VBBAT);
+
+static SENSOR_DEVICE_ATTR_RO(temp1_input,
+ da9063_adc, DA9063_CHAN_TJUNC);
+static SENSOR_DEVICE_ATTR_RO(temp1_label,
+ da9063_label, DA9063_CHAN_TJUNC);
+
+static struct attribute *da9063_attrs[] = {
+ &sensor_dev_attr_in0_input.dev_attr.attr,
+ &sensor_dev_attr_in0_label.dev_attr.attr,
+ &sensor_dev_attr_in4_input.dev_attr.attr,
+ &sensor_dev_attr_in4_label.dev_attr.attr,
+ &sensor_dev_attr_temp1_input.dev_attr.attr,
+ &sensor_dev_attr_temp1_label.dev_attr.attr,
+ NULL
+};
+
+ATTRIBUTE_GROUPS(da9063);
+
+static int da9063_hwmon_probe(struct platform_device *pdev)
+{
+ struct da9063 *da9063 = dev_get_drvdata(pdev->dev.parent);
+ struct da9063_hwmon *hwmon;
+ struct device *hwmon_dev;
+ int irq;
+ int ret;
+
+ hwmon = devm_kzalloc(&pdev->dev, sizeof(struct da9063_hwmon),
+ GFP_KERNEL);
+ if (!hwmon)
+ return -ENOMEM;
+
+ mutex_init(&hwmon->hwmon_mutex);
+ init_completion(&hwmon->adc_ready);
+ hwmon->da9063 = da9063;
+
+ irq = platform_get_irq_byname(pdev, DA9063_DRVNAME_HWMON);
+ if (irq < 0)
+ return irq;
+
+ ret = devm_request_threaded_irq(&pdev->dev, irq, NULL,
+ da9063_hwmon_irq_handler,
+ IRQF_TRIGGER_LOW | IRQF_ONESHOT,
+ "HWMON", hwmon);
+ if (ret) {
+ dev_err(&pdev->dev, "Failed to request IRQ.\n");
+ return ret;
+ }
+
+ platform_set_drvdata(pdev, hwmon);
+
+ /* set trim temperature offset to value read at startup */
+ hwmon->tjunc_offset = (signed char)hwmon->da9063->t_offset;
+
+ hwmon_dev = devm_hwmon_device_register_with_groups(&pdev->dev,
+ "da9063",
+ hwmon, da9063_groups);
+
+ return PTR_ERR_OR_ZERO(hwmon_dev);
+}
+
+static const struct of_device_id da9063_dt_ids[] = {
+ { .compatible = DA9063_DRVNAME_HWMON, },
+ { }
+};
+MODULE_DEVICE_TABLE(of, da9063_dt_ids);
+
+static struct platform_driver da9063_hwmon_driver = {
+ .probe = da9063_hwmon_probe,
+ .driver = {
+ .name = DA9063_DRVNAME_HWMON,
+ .of_match_table = da9063_dt_ids,
+ },
+};
+module_platform_driver(da9063_hwmon_driver);
+
+MODULE_DESCRIPTION("Hardware monitor support device driver for Dialog DA9063");
+MODULE_AUTHOR("S Twiss <[email protected]>");
+MODULE_LICENSE("GPL v2");
+MODULE_ALIAS("platform:" DA9063_DRVNAME_HWMON);
diff --git a/include/linux/mfd/da9063/registers.h b/include/linux/mfd/da9063/registers.h
index 6e0f66a2e727..297631ddda39 100644
--- a/include/linux/mfd/da9063/registers.h
+++ b/include/linux/mfd/da9063/registers.h
@@ -512,6 +512,7 @@
/* DA9063_REG_GPIO_0_1 (addr=0x15) */
#define DA9063_GPIO0_PIN_MASK 0x03
+#define DA9063_GPIO0_PIN_MASK_SHIFT 0
#define DA9063_GPIO0_PIN_ADCIN1 0x00
#define DA9063_GPIO0_PIN_GPI 0x01
#define DA9063_GPIO0_PIN_GPO_OD 0x02
@@ -523,6 +524,7 @@
#define DA9063_GPIO0_TYPE_GPO_VDD_IO2 0x04
#define DA9063_GPIO0_NO_WAKEUP 0x08
#define DA9063_GPIO1_PIN_MASK 0x30
+#define DA9063_GPIO1_PIN_MASK_SHIFT 4
#define DA9063_GPIO1_PIN_ADCIN2_COMP 0x00
#define DA9063_GPIO1_PIN_GPI 0x10
#define DA9063_GPIO1_PIN_GPO_OD 0x20
@@ -536,6 +538,7 @@
/* DA9063_REG_GPIO_2_3 (addr=0x16) */
#define DA9063_GPIO2_PIN_MASK 0x03
+#define DA9063_GPIO2_PIN_MASK_SHIFT 0
#define DA9063_GPIO2_PIN_ADCIN3 0x00
#define DA9063_GPIO2_PIN_GPI 0x01
#define DA9063_GPIO2_PIN_GPO_PSS 0x02
@@ -851,6 +854,7 @@
#define DA9063_VSYS_VAL_BASE 0x00
/* DA9063_REG_ADC_RES_L (addr=0x37) */
+#define DA9063_ADC_RES_L_SHIFT 6
#define DA9063_ADC_RES_L_BITS 2
#define DA9063_ADC_RES_L_MASK 0xC0
@@ -1014,6 +1018,36 @@
#define DA9063_GPIO_DIM 0x80
#define DA9063_GPIO_PWM_MASK 0x7F
+/* DA9063_REG_ADC_CFG (addr=0xC9) */
+#define DA9063_REG_ADCIN1_CUR_MASK 0x03
+#define DA9063_REG_ADCIN1_CUR_SHIFT 0
+#define DA9063_ADCIN1_CUR_1UA 0x00
+#define DA9063_ADCIN1_CUR_2UA 0x01
+#define DA9063_ADCIN1_CUR_10UA 0x02
+#define DA9063_ADCIN1_CUR_40UA 0x03
+#define DA9063_REG_ADCIN2_CUR_MASK 0x0C
+#define DA9063_REG_ADCIN2_CUR_SHIFT 2
+#define DA9063_ADCIN2_CUR_1UA 0x00
+#define DA9063_ADCIN2_CUR_2UA 0x01
+#define DA9063_ADCIN2_CUR_10UA 0x02
+#define DA9063_ADCIN2_CUR_40UA 0x03
+#define DA9063_REG_ADCIN3_CUR_MASK 0x10
+#define DA9063_REG_ADCIN3_CUR_SHIFT 4
+#define DA9063_ADCIN3_CUR_10UA 0x00
+#define DA9063_ADCIN3_CUR_40UA 0x01
+#define DA9063_REG_ADCIN1_DEB_MASK 0x20
+#define DA9063_REG_ADCIN1_DEB_SHIFT 5
+#define DA9063_ADCIN1_DEB_OFF 0x00
+#define DA9063_ADCIN1_DEB_ON 0x01
+#define DA9063_REG_ADCIN2_DEB_MASK 0x40
+#define DA9063_REG_ADCIN2_DEB_SHIFT 6
+#define DA9063_ADCIN2_DEB_OFF 0x00
+#define DA9063_ADCIN2_DEB_ON 0x01
+#define DA9063_REG_ADCIN3_DEB_MASK 0x80
+#define DA9063_REG_ADCIN3_DEB_SHIFT 7
+#define DA9063_ADCIN3_DEB_OFF 0x00
+#define DA9063_ADCIN3_DEB_ON 0x01
+
/* DA9063_REG_CONFIG_H (addr=0x10D) */
#define DA9063_PWM_CLK_MASK 0x01
#define DA9063_PWM_CLK_PWM2MHZ 0x00
--
2.32.0
From: "Opensource [Steve Twiss]" <[email protected]>
Addition of HWMON documentation for the DA9063 driver.
Signed-off-by: Opensource [Steve Twiss] <[email protected]>
Updated temperature formula, as of datasheet rev 2.3.
Signed-off-by: Vincent Pelletier <[email protected]>
---
Originally submitted by Steve Twiss in 2014:
https://marc.info/?l=linux-kernel&m=139560868209856&w=2
Documentation/hwmon/da9063 | 67 ++++++++++++++++++++++++++++++++++++++
1 file changed, 67 insertions(+)
create mode 100644 Documentation/hwmon/da9063
diff --git a/Documentation/hwmon/da9063 b/Documentation/hwmon/da9063
new file mode 100644
index 000000000000..879f1d0fb3e4
--- /dev/null
+++ b/Documentation/hwmon/da9063
@@ -0,0 +1,67 @@
+
+Kernel driver da9063-hwmon
+==========================
+
+Supported chips:
+ * Dialog Semiconductor DA9063 PMIC
+ Prefix: 'da9063'
+ Datasheet:
+ http://www.dialog-semiconductor.com/products/power-management/DA9063
+
+Authors: S Twiss <[email protected]>
+
+Description
+-----------
+
+The DA9063 PMIC provides a general purpose ADC with 10 bits of resolution.
+It uses track and hold circuitry with an analogue input multiplexer which
+allows the conversion of up to 9 different inputs.
+
+ Channel 0: VSYS_RES measurement of the system VDD (2.5 - 5.5V)
+ Channel 1: ADCIN1_RES high impedance input (0 - 2.5V)
+ Channel 2: ADCIN2_RES high impedance input (0 - 2.5V)
+ Channel 3: ADCIN3_RES high impedance input (0 - 2.5V)
+ Channel 4: Tjunc measurement of internal temperature sensor
+ Channel 5: VBBAT measurement of the backup battery voltage (0 - 5.0V)
+ Channel 6: N/A Reserved
+ Channel 7: N/A Reserved
+ Channel 8: MON1_RES group 1 internal regulators voltage (0 - 5.0V)
+ Channel 9: MON2_RES group 2 internal regulators voltage (0 - 5.0V)
+ Channel 10: MON3_RES group 3 internal regulators voltage (0 - 5.0V)
+
+The MUX selects from and isolates the 9 inputs and presents the channel to
+be measured to the ADC input. When selected, an input amplifier on the VSYS
+channel subtracts the VDDCORE reference voltage and scales the signal to the
+correct value for the ADC.
+
+The analog ADC includes current sources at ADC_IN1, ADC_IN2 and ADC_IN3 to
+support resistive measurements.
+
+Channels 1, 2 and 3 current source capability can be set through the ADC
+thresholds ADC_CFG register and values for ADCIN1_CUR, ADCIN2_CUR and
+ADCIN3_CUR. Settings for ADCIN1_CUR and ADCIN2_CUR are 1.0, 2.0, 10 and
+40 micro Amps. The setting for ADCIN3_CUR is 10 micro Amps.
+
+Voltage Monitoring
+------------------
+
+The manual measurement allows monitoring of the system voltage VSYS, the
+auxiliary channels ADCIN1, ADCIN2 and ADCIN3, and a VBBAT measurement of
+the backup battery voltage (0 - 5.0V). The manual measurements store 10
+bits of ADC resolution.
+
+The manual ADC measurements attributes described above are supported by
+the driver.
+
+The automatic ADC measurement is not supported by the driver.
+
+Temperature Monitoring
+----------------------
+
+Channel 4 (Tjunc) will be used to measure the output of the internal
+temperature sensor. The ADC measurement result and the T_OFFSET value can
+be used by the host to calculate the internal junction temperature
+
+ Tjunc = -0.398 * (ADC - T_OFFSET) + 330;
+
+The junction temperature attribute is supported by the driver.
--
2.32.0
On 7/5/21 5:01 PM, Vincent Pelletier wrote:
> From: "Opensource [Steve Twiss]" <[email protected]>
>
> Addition of HWMON documentation for the DA9063 driver.
>
> Signed-off-by: Opensource [Steve Twiss] <[email protected]>
>
> Updated temperature formula, as of datasheet rev 2.3.
>
> Signed-off-by: Vincent Pelletier <[email protected]>
> ---
> Originally submitted by Steve Twiss in 2014:
> https://marc.info/?l=linux-kernel&m=139560868209856&w=2
>
> Documentation/hwmon/da9063 | 67 ++++++++++++++++++++++++++++++++++++++
Documentation is now in .rst format.
> 1 file changed, 67 insertions(+)
> create mode 100644 Documentation/hwmon/da9063
>
> diff --git a/Documentation/hwmon/da9063 b/Documentation/hwmon/da9063
> new file mode 100644
> index 000000000000..879f1d0fb3e4
> --- /dev/null
> +++ b/Documentation/hwmon/da9063
> @@ -0,0 +1,67 @@
> +
> +Kernel driver da9063-hwmon
> +==========================
> +
> +Supported chips:
> + * Dialog Semiconductor DA9063 PMIC
> + Prefix: 'da9063'
> + Datasheet:
> + http://www.dialog-semiconductor.com/products/power-management/DA9063
> +
> +Authors: S Twiss <[email protected]>
> +
> +Description
> +-----------
> +
> +The DA9063 PMIC provides a general purpose ADC with 10 bits of resolution.
> +It uses track and hold circuitry with an analogue input multiplexer which
> +allows the conversion of up to 9 different inputs.
> +
> + Channel 0: VSYS_RES measurement of the system VDD (2.5 - 5.5V)
> + Channel 1: ADCIN1_RES high impedance input (0 - 2.5V)
> + Channel 2: ADCIN2_RES high impedance input (0 - 2.5V)
> + Channel 3: ADCIN3_RES high impedance input (0 - 2.5V)
> + Channel 4: Tjunc measurement of internal temperature sensor
> + Channel 5: VBBAT measurement of the backup battery voltage (0 - 5.0V)
> + Channel 6: N/A Reserved
> + Channel 7: N/A Reserved
> + Channel 8: MON1_RES group 1 internal regulators voltage (0 - 5.0V)
> + Channel 9: MON2_RES group 2 internal regulators voltage (0 - 5.0V)
> + Channel 10: MON3_RES group 3 internal regulators voltage (0 - 5.0V)
> +
> +The MUX selects from and isolates the 9 inputs and presents the channel to
> +be measured to the ADC input. When selected, an input amplifier on the VSYS
> +channel subtracts the VDDCORE reference voltage and scales the signal to the
> +correct value for the ADC.
> +
> +The analog ADC includes current sources at ADC_IN1, ADC_IN2 and ADC_IN3 to
> +support resistive measurements.
> +
> +Channels 1, 2 and 3 current source capability can be set through the ADC
> +thresholds ADC_CFG register and values for ADCIN1_CUR, ADCIN2_CUR and
> +ADCIN3_CUR. Settings for ADCIN1_CUR and ADCIN2_CUR are 1.0, 2.0, 10 and
> +40 micro Amps. The setting for ADCIN3_CUR is 10 micro Amps.
> +
> +Voltage Monitoring
> +------------------
> +
> +The manual measurement allows monitoring of the system voltage VSYS, the
> +auxiliary channels ADCIN1, ADCIN2 and ADCIN3, and a VBBAT measurement of
> +the backup battery voltage (0 - 5.0V). The manual measurements store 10
> +bits of ADC resolution.
> +
> +The manual ADC measurements attributes described above are supported by
> +the driver.
> +
> +The automatic ADC measurement is not supported by the driver.
> +
> +Temperature Monitoring
> +----------------------
> +
> +Channel 4 (Tjunc) will be used to measure the output of the internal
> +temperature sensor. The ADC measurement result and the T_OFFSET value can
> +be used by the host to calculate the internal junction temperature
> +
> + Tjunc = -0.398 * (ADC - T_OFFSET) + 330;
> +
> +The junction temperature attribute is supported by the driver.
>
On 7/5/21 5:01 PM, Vincent Pelletier wrote:
> From: "Opensource [Steve Twiss]" <[email protected]>
>
> Add the HWMON driver for DA9063
>
> Signed-off-by: Opensource [Steve Twiss] <[email protected]>
>
> Simplify and modernise the code a bit.
> Add minimal of_match_table.
> Fix logic inversion in detecting conversion end.
> Drop support for ADCIN: these are multi-purpose channels and must not
> be reconfigured unless explicitly authorised by the board description.
>
> Signed-off-by: Vincent Pelletier <[email protected]>
> ---
> This patch depends on patch 1/3.
> Originally submitted by Steve Twiss in 2014:
> https://marc.info/?l=linux-kernel&m=139560868309857&w=2
>
> drivers/hwmon/Kconfig | 10 +
> drivers/hwmon/Makefile | 1 +
> drivers/hwmon/da9063-hwmon.c | 287 +++++++++++++++++++++++++++
> include/linux/mfd/da9063/registers.h | 34 ++++
> 4 files changed, 332 insertions(+)
> create mode 100644 drivers/hwmon/da9063-hwmon.c
>
> diff --git a/drivers/hwmon/Kconfig b/drivers/hwmon/Kconfig
> index 87624902ea80..17244cfaa855 100644
> --- a/drivers/hwmon/Kconfig
> +++ b/drivers/hwmon/Kconfig
> @@ -515,6 +515,16 @@ config SENSORS_DA9055
> This driver can also be built as a module. If so, the module
> will be called da9055-hwmon.
>
> +config SENSORS_DA9063
> + tristate "Dialog Semiconductor DA9063"
> + depends on MFD_DA9063
> + help
> + If you say yes here you get support for the hardware
> + monitoring features of the DA9063 Power Management IC.
> +
> + This driver can also be built as a module. If so, the module
> + will be called da9063-hwmon.
> +
> config SENSORS_I5K_AMB
> tristate "FB-DIMM AMB temperature sensor on Intel 5000 series chipsets"
> depends on PCI
> diff --git a/drivers/hwmon/Makefile b/drivers/hwmon/Makefile
> index 59e78bc212cf..6855711ed9ec 100644
> --- a/drivers/hwmon/Makefile
> +++ b/drivers/hwmon/Makefile
> @@ -60,6 +60,7 @@ obj-$(CONFIG_SENSORS_CORSAIR_CPRO) += corsair-cpro.o
> obj-$(CONFIG_SENSORS_CORSAIR_PSU) += corsair-psu.o
> obj-$(CONFIG_SENSORS_DA9052_ADC)+= da9052-hwmon.o
> obj-$(CONFIG_SENSORS_DA9055)+= da9055-hwmon.o
> +obj-$(CONFIG_SENSORS_DA9063) += da9063-hwmon.o
> obj-$(CONFIG_SENSORS_DELL_SMM) += dell-smm-hwmon.o
> obj-$(CONFIG_SENSORS_DME1737) += dme1737.o
> obj-$(CONFIG_SENSORS_DRIVETEMP) += drivetemp.o
> diff --git a/drivers/hwmon/da9063-hwmon.c b/drivers/hwmon/da9063-hwmon.c
> new file mode 100644
> index 000000000000..35b5bb0290ca
> --- /dev/null
> +++ b/drivers/hwmon/da9063-hwmon.c
> @@ -0,0 +1,287 @@
> +/* da9063-hwmon.c - Hardware monitor support for DA9063
> + * Copyright (C) 2014 Dialog Semiconductor Ltd.
> + *
> + * This library is free software; you can redistribute it and/or
> + * modify it under the terms of the GNU Library General Public
> + * License as published by the Free Software Foundation; either
> + * version 2 of the License, or (at your option) any later version.
> + *
> + * This library is distributed in the hope that it will be useful,
> + * but WITHOUT ANY WARRANTY; without even the implied warranty of
> + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
> + * Library General Public License for more details.
> + */
> +
> +#include <linux/kernel.h>
> +#include <linux/module.h>
> +#include <linux/err.h>
> +#include <linux/delay.h>
> +#include <linux/init.h>
> +#include <linux/slab.h>
> +#include <linux/string.h>
> +#include <linux/platform_device.h>
> +#include <linux/hwmon.h>
> +#include <linux/hwmon-sysfs.h>
> +#include <linux/regmap.h>
> +#include <linux/mfd/da9063/core.h>
> +#include <linux/mod_devicetable.h>
> +
Alphabetic include file order, please.
> +#define DA9063_ADC_RES (1 << (DA9063_ADC_RES_L_BITS + DA9063_ADC_RES_M_BITS))
> +#define DA9063_ADC_MAX (DA9063_ADC_RES - 1)
> +#define DA9063_2V5 2500
> +#define DA9063_5V0 5000
> +#define DA9063_5V5 5500
> +#define DA9063_TJUNC_M -398
> +#define DA9063_TJUNC_O 330000
> +#define DA9063_VBBAT_M 2048
> +
> +enum da9063_adc {
> + DA9063_CHAN_VSYS = DA9063_ADC_MUX_VSYS,
> + DA9063_CHAN_ADCIN1 = DA9063_ADC_MUX_ADCIN1,
> + DA9063_CHAN_ADCIN2 = DA9063_ADC_MUX_ADCIN2,
> + DA9063_CHAN_ADCIN3 = DA9063_ADC_MUX_ADCIN3,
> + DA9063_CHAN_TJUNC = DA9063_ADC_MUX_T_SENSE,
> + DA9063_CHAN_VBBAT = DA9063_ADC_MUX_VBBAT,
> + DA9063_CHAN_LDO_G1 = DA9063_ADC_MUX_LDO_G1,
> + DA9063_CHAN_LDO_G2 = DA9063_ADC_MUX_LDO_G2,
> + DA9063_CHAN_LDO_G3 = DA9063_ADC_MUX_LDO_G3
> +};
> +
> +struct da9063_hwmon {
> + struct da9063 *da9063;
> + struct mutex hwmon_mutex;
> + struct completion adc_ready;
> + signed char tjunc_offset;
> +};
> +
> +static int da9063_adc_convert(struct da9063_hwmon *hwmon, int channel,
> + int *value)
> +{
> + int val = *value;
> + int ret = 0;
> +
> + switch (channel) {
> + case DA9063_CHAN_VSYS:
> + val = ((DA9063_5V5 - DA9063_2V5) * val) / DA9063_ADC_MAX +
> + DA9063_2V5;
> + break;
> + case DA9063_CHAN_TJUNC:
> + val -= hwmon->tjunc_offset;
> + val = DA9063_TJUNC_M * val + DA9063_TJUNC_O;
> + break;
> + case DA9063_CHAN_VBBAT:
> + val = (DA9063_5V0 * val) / DA9063_ADC_MAX;
> + break;
> + default:
> + ret = -EINVAL;
> + goto err_convert;
> + }
> +
> + *value = val;
> +err_convert:
> + return ret;
> +}
> +
> +
> +static int da9063_adc_manual_read(struct da9063_hwmon *hwmon, int channel)
> +{
> + int ret;
> + unsigned char val;
> + unsigned char data[2];
> + int adc_man;
> +
> + mutex_lock(&hwmon->hwmon_mutex);
> +
> + init_completion(&hwmon->adc_ready);
> +
> + val = (channel & DA9063_ADC_MUX_MASK) | DA9063_ADC_MAN;
> + ret = regmap_update_bits(hwmon->da9063->regmap, DA9063_REG_ADC_MAN,
> + DA9063_ADC_MUX_MASK | DA9063_ADC_MAN, val);
> + if (ret < 0)
> + goto err_mread;
> +
> + ret = wait_for_completion_timeout(&hwmon->adc_ready,
> + msecs_to_jiffies(1000));
> + if (ret == 0) {
> + ret = -ETIMEDOUT;
> + goto err_mread;
> + }
> +
> + ret = regmap_read(hwmon->da9063->regmap, DA9063_REG_ADC_MAN, &adc_man);
> + if (ret < 0)
> + goto err_mread;
> +
> + /* data value is not ready */
> + if (adc_man & DA9063_ADC_MAN) {
> + ret = -EINVAL;
> + goto err_mread;
> + }
> +
> + ret = regmap_bulk_read(hwmon->da9063->regmap,
> + DA9063_REG_ADC_RES_L, data, 2);
> + if (ret < 0)
> + goto err_mread;
> +
> + ret = (data[0] & DA9063_ADC_RES_L_MASK) >> DA9063_ADC_RES_L_SHIFT;
> + ret |= data[1] << DA9063_ADC_RES_L_BITS;
> +err_mread:
> + mutex_unlock(&hwmon->hwmon_mutex);
> + return ret;
> +}
> +
> +static irqreturn_t da9063_hwmon_irq_handler(int irq, void *irq_data)
> +{
> + struct da9063_hwmon *hwmon = irq_data;
> + complete(&hwmon->adc_ready);
> + return IRQ_HANDLED;
> +}
> +
> +static ssize_t da9063_adc_show(struct device *dev,
> + struct device_attribute *devattr, char *buf)
> +{
> + struct da9063_hwmon *hwmon = dev_get_drvdata(dev);
> + int channel = to_sensor_dev_attr(devattr)->index;
> + int val;
> + int ret;
> +
> + switch (channel) {
> + case DA9063_CHAN_VSYS:
> + case DA9063_CHAN_TJUNC:
> + case DA9063_CHAN_VBBAT:
> + /* fallthrough for internal measures */
> + val = da9063_adc_manual_read(hwmon, channel);
> + if (val < 0) {
> + dev_err(dev, "ADC read error %d\n", val);
> + return val;
> + }
> + break;
> +
> + default:
> + /* error case */
> + ret = -EINVAL;
> + goto err_read;
goto to return statement is unnecessary (and inconsistent).
> + }
> +
> + ret = da9063_adc_convert(hwmon, channel, &val);
> + if (ret < 0) {
> + dev_err(dev, "Failed to convert ADC value %d\n", ret);
> + goto err_read;
> + }
> +
> + return sprintf(buf, "%d\n", val);
> +err_read:
> + return ret;
> +}
> +
> +
> +static ssize_t da9063_label_show(struct device *dev,
> + struct device_attribute *devattr, char *buf)
> +{
> + int channel = to_sensor_dev_attr(devattr)->index;
> + char *label;
> +
> + switch (channel) {
> + case DA9063_CHAN_VSYS:
> + label = "VSYS";
> + break;
> + case DA9063_CHAN_TJUNC:
> + label = "TJUNC";
> + break;
> + case DA9063_CHAN_VBBAT:
> + label = "VBBAT";
> + break;
> + default:
> + label = "UNKNOWN";
> + }
> +
> + return sprintf(buf, "%s\n", label);
> +}
> +
> +static SENSOR_DEVICE_ATTR_RO(in0_input,
> + da9063_adc, DA9063_CHAN_VSYS);
> +static SENSOR_DEVICE_ATTR_RO(in0_label,
> + da9063_label, DA9063_CHAN_VSYS);
> +
> +static SENSOR_DEVICE_ATTR_RO(in4_input,
> + da9063_adc, DA9063_CHAN_VBBAT);
> +static SENSOR_DEVICE_ATTR_RO(in4_label,
> + da9063_label, DA9063_CHAN_VBBAT);
> +
> +static SENSOR_DEVICE_ATTR_RO(temp1_input,
> + da9063_adc, DA9063_CHAN_TJUNC);
> +static SENSOR_DEVICE_ATTR_RO(temp1_label,
> + da9063_label, DA9063_CHAN_TJUNC);
> +
> +static struct attribute *da9063_attrs[] = {
> + &sensor_dev_attr_in0_input.dev_attr.attr,
> + &sensor_dev_attr_in0_label.dev_attr.attr,
> + &sensor_dev_attr_in4_input.dev_attr.attr,
> + &sensor_dev_attr_in4_label.dev_attr.attr,
> + &sensor_dev_attr_temp1_input.dev_attr.attr,
> + &sensor_dev_attr_temp1_label.dev_attr.attr,
> + NULL
> +};
> +
> +ATTRIBUTE_GROUPS(da9063);
> +
> +static int da9063_hwmon_probe(struct platform_device *pdev)
> +{
> + struct da9063 *da9063 = dev_get_drvdata(pdev->dev.parent);
> + struct da9063_hwmon *hwmon;
> + struct device *hwmon_dev;
> + int irq;
> + int ret;
> +
> + hwmon = devm_kzalloc(&pdev->dev, sizeof(struct da9063_hwmon),
> + GFP_KERNEL);
> + if (!hwmon)
> + return -ENOMEM;
> +
> + mutex_init(&hwmon->hwmon_mutex);
> + init_completion(&hwmon->adc_ready);
> + hwmon->da9063 = da9063;
> +
> + irq = platform_get_irq_byname(pdev, DA9063_DRVNAME_HWMON);
> + if (irq < 0)
> + return irq;
> +
> + ret = devm_request_threaded_irq(&pdev->dev, irq, NULL,
> + da9063_hwmon_irq_handler,
> + IRQF_TRIGGER_LOW | IRQF_ONESHOT,
> + "HWMON", hwmon);
> + if (ret) {
> + dev_err(&pdev->dev, "Failed to request IRQ.\n");
> + return ret;
> + }
> +
> + platform_set_drvdata(pdev, hwmon);
> +
> + /* set trim temperature offset to value read at startup */
> + hwmon->tjunc_offset = (signed char)hwmon->da9063->t_offset;
> +
> + hwmon_dev = devm_hwmon_device_register_with_groups(&pdev->dev,
> + "da9063",
> + hwmon, da9063_groups);
New hwmon drivers must use [devm_]hwmon_device_register_with_info()
to register the hwmon device.
> +
> + return PTR_ERR_OR_ZERO(hwmon_dev);
> +}
> +
> +static const struct of_device_id da9063_dt_ids[] = {
> + { .compatible = DA9063_DRVNAME_HWMON, },
> + { }
> +};
> +MODULE_DEVICE_TABLE(of, da9063_dt_ids);
> +
> +static struct platform_driver da9063_hwmon_driver = {
> + .probe = da9063_hwmon_probe,
> + .driver = {
> + .name = DA9063_DRVNAME_HWMON,
> + .of_match_table = da9063_dt_ids,
> + },
> +};
> +module_platform_driver(da9063_hwmon_driver);
> +
> +MODULE_DESCRIPTION("Hardware monitor support device driver for Dialog DA9063");
> +MODULE_AUTHOR("S Twiss <[email protected]>");
> +MODULE_LICENSE("GPL v2");
> +MODULE_ALIAS("platform:" DA9063_DRVNAME_HWMON);
> diff --git a/include/linux/mfd/da9063/registers.h b/include/linux/mfd/da9063/registers.h
This isn't appropriate as part of the hwmon driver.
> index 6e0f66a2e727..297631ddda39 100644
> --- a/include/linux/mfd/da9063/registers.h
> +++ b/include/linux/mfd/da9063/registers.h
> @@ -512,6 +512,7 @@
>
> /* DA9063_REG_GPIO_0_1 (addr=0x15) */
> #define DA9063_GPIO0_PIN_MASK 0x03
> +#define DA9063_GPIO0_PIN_MASK_SHIFT 0
> #define DA9063_GPIO0_PIN_ADCIN1 0x00
> #define DA9063_GPIO0_PIN_GPI 0x01
> #define DA9063_GPIO0_PIN_GPO_OD 0x02
> @@ -523,6 +524,7 @@
> #define DA9063_GPIO0_TYPE_GPO_VDD_IO2 0x04
> #define DA9063_GPIO0_NO_WAKEUP 0x08
> #define DA9063_GPIO1_PIN_MASK 0x30
> +#define DA9063_GPIO1_PIN_MASK_SHIFT 4
> #define DA9063_GPIO1_PIN_ADCIN2_COMP 0x00
> #define DA9063_GPIO1_PIN_GPI 0x10
> #define DA9063_GPIO1_PIN_GPO_OD 0x20
> @@ -536,6 +538,7 @@
>
> /* DA9063_REG_GPIO_2_3 (addr=0x16) */
> #define DA9063_GPIO2_PIN_MASK 0x03
> +#define DA9063_GPIO2_PIN_MASK_SHIFT 0
> #define DA9063_GPIO2_PIN_ADCIN3 0x00
> #define DA9063_GPIO2_PIN_GPI 0x01
> #define DA9063_GPIO2_PIN_GPO_PSS 0x02
> @@ -851,6 +854,7 @@
> #define DA9063_VSYS_VAL_BASE 0x00
>
> /* DA9063_REG_ADC_RES_L (addr=0x37) */
> +#define DA9063_ADC_RES_L_SHIFT 6
> #define DA9063_ADC_RES_L_BITS 2
> #define DA9063_ADC_RES_L_MASK 0xC0
>
> @@ -1014,6 +1018,36 @@
> #define DA9063_GPIO_DIM 0x80
> #define DA9063_GPIO_PWM_MASK 0x7F
>
> +/* DA9063_REG_ADC_CFG (addr=0xC9) */
> +#define DA9063_REG_ADCIN1_CUR_MASK 0x03
> +#define DA9063_REG_ADCIN1_CUR_SHIFT 0
> +#define DA9063_ADCIN1_CUR_1UA 0x00
> +#define DA9063_ADCIN1_CUR_2UA 0x01
> +#define DA9063_ADCIN1_CUR_10UA 0x02
> +#define DA9063_ADCIN1_CUR_40UA 0x03
> +#define DA9063_REG_ADCIN2_CUR_MASK 0x0C
> +#define DA9063_REG_ADCIN2_CUR_SHIFT 2
> +#define DA9063_ADCIN2_CUR_1UA 0x00
> +#define DA9063_ADCIN2_CUR_2UA 0x01
> +#define DA9063_ADCIN2_CUR_10UA 0x02
> +#define DA9063_ADCIN2_CUR_40UA 0x03
> +#define DA9063_REG_ADCIN3_CUR_MASK 0x10
> +#define DA9063_REG_ADCIN3_CUR_SHIFT 4
> +#define DA9063_ADCIN3_CUR_10UA 0x00
> +#define DA9063_ADCIN3_CUR_40UA 0x01
> +#define DA9063_REG_ADCIN1_DEB_MASK 0x20
> +#define DA9063_REG_ADCIN1_DEB_SHIFT 5
> +#define DA9063_ADCIN1_DEB_OFF 0x00
> +#define DA9063_ADCIN1_DEB_ON 0x01
> +#define DA9063_REG_ADCIN2_DEB_MASK 0x40
> +#define DA9063_REG_ADCIN2_DEB_SHIFT 6
> +#define DA9063_ADCIN2_DEB_OFF 0x00
> +#define DA9063_ADCIN2_DEB_ON 0x01
> +#define DA9063_REG_ADCIN3_DEB_MASK 0x80
> +#define DA9063_REG_ADCIN3_DEB_SHIFT 7
> +#define DA9063_ADCIN3_DEB_OFF 0x00
> +#define DA9063_ADCIN3_DEB_ON 0x01
> +
> /* DA9063_REG_CONFIG_H (addr=0x10D) */
> #define DA9063_PWM_CLK_MASK 0x01
> #define DA9063_PWM_CLK_PWM2MHZ 0x00
>