Re: [PATCH v7 2/5] platform: arm64: Add driver for EC found on Qualcomm reference devices

[Anvesh Jain P <anvesh.p@oss.qualcomm.com>]

On 3/27/2026 5:20 PM, Ilpo Järvinen wrote:
> On Fri, 27 Mar 2026, Anvesh Jain P wrote:
> 
>> From: Sibi Sankar <sibi.sankar@oss.qualcomm.com>
>>
>> Add Embedded controller driver support for Hamoa/Purwa/Glymur qualcomm
>> reference boards. It handles fan control, temperature sensors, access
>> to EC state changes and supports reporting suspend entry/exit to the
>> EC.
>>
>> Co-developed-by: Maya Matuszczyk <maccraft123mc@gmail.com>
>> Signed-off-by: Maya Matuszczyk <maccraft123mc@gmail.com>
>> Signed-off-by: Sibi Sankar <sibi.sankar@oss.qualcomm.com>
>> Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>
>> Acked-by: Konrad Dybcio <konrad.dybcio@oss.qualcomm.com>
>> Co-developed-by: Anvesh Jain P <anvesh.p@oss.qualcomm.com>
>> Signed-off-by: Anvesh Jain P <anvesh.p@oss.qualcomm.com>
>> ---
>>  MAINTAINERS                            |   8 +
>>  drivers/platform/arm64/Kconfig         |  12 +
>>  drivers/platform/arm64/Makefile        |   1 +
>>  drivers/platform/arm64/qcom-hamoa-ec.c | 451 +++++++++++++++++++++++++++++++++
>>  4 files changed, 472 insertions(+)
>>
>> diff --git a/MAINTAINERS b/MAINTAINERS
>> index 30ca84404976..536dfd9adff4 100644
>> --- a/MAINTAINERS
>> +++ b/MAINTAINERS
>> @@ -21804,6 +21804,14 @@ F:	Documentation/devicetree/bindings/misc/qcom,fastrpc.yaml
>>  F:	drivers/misc/fastrpc.c
>>  F:	include/uapi/misc/fastrpc.h
>>  
>> +QUALCOMM HAMOA EMBEDDED CONTROLLER DRIVER
>> +M:	Anvesh Jain P <anvesh.p@oss.qualcomm.com>
>> +M:	Sibi Sankar <sibi.sankar@oss.qualcomm.com>
>> +L:	linux-arm-msm@vger.kernel.org
>> +S:	Maintained
>> +F:	Documentation/devicetree/bindings/embedded-controller/qcom,hamoa-ec.yaml
>> +F:	drivers/platform/arm64/qcom-hamoa-ec.c
>> +
>>  QUALCOMM HEXAGON ARCHITECTURE
>>  M:	Brian Cain <brian.cain@oss.qualcomm.com>
>>  L:	linux-hexagon@vger.kernel.org
>> diff --git a/drivers/platform/arm64/Kconfig b/drivers/platform/arm64/Kconfig
>> index 10f905d7d6bf..025cdf091f9e 100644
>> --- a/drivers/platform/arm64/Kconfig
>> +++ b/drivers/platform/arm64/Kconfig
>> @@ -90,4 +90,16 @@ config EC_LENOVO_THINKPAD_T14S
>>  
>>  	  Say M or Y here to include this support.
>>  
>> +config EC_QCOM_HAMOA
>> +	tristate "Embedded Controller driver for Qualcomm Hamoa/Glymur reference devices"
>> +	depends on ARCH_QCOM || COMPILE_TEST
>> +	depends on I2C
>> +	help
>> +	  Say M or Y here to enable the Embedded Controller driver for Qualcomm
>> +	  Snapdragon-based Hamoa/Glymur reference devices. The driver handles fan
>> +	  control, temperature sensors, access to EC state changes and supports
>> +	  reporting suspend entry/exit to the EC.
>> +
>> +	  This driver currently supports Hamoa/Purwa/Glymur reference devices.
>> +
>>  endif # ARM64_PLATFORM_DEVICES
>> diff --git a/drivers/platform/arm64/Makefile b/drivers/platform/arm64/Makefile
>> index 60c131cff6a1..7681be4a46e9 100644
>> --- a/drivers/platform/arm64/Makefile
>> +++ b/drivers/platform/arm64/Makefile
>> @@ -9,3 +9,4 @@ obj-$(CONFIG_EC_ACER_ASPIRE1)	+= acer-aspire1-ec.o
>>  obj-$(CONFIG_EC_HUAWEI_GAOKUN)	+= huawei-gaokun-ec.o
>>  obj-$(CONFIG_EC_LENOVO_YOGA_C630) += lenovo-yoga-c630.o
>>  obj-$(CONFIG_EC_LENOVO_THINKPAD_T14S) += lenovo-thinkpad-t14s.o
>> +obj-$(CONFIG_EC_QCOM_HAMOA) += qcom-hamoa-ec.o
>> diff --git a/drivers/platform/arm64/qcom-hamoa-ec.c b/drivers/platform/arm64/qcom-hamoa-ec.c
>> new file mode 100644
>> index 000000000000..0f883130ac9a
>> --- /dev/null
>> +++ b/drivers/platform/arm64/qcom-hamoa-ec.c
>> @@ -0,0 +1,451 @@
>> +// SPDX-License-Identifier: GPL-2.0-only
>> +/*
>> + * Copyright (c) 2024 Maya Matuszczyk <maccraft123mc@gmail.com>
>> + * Copyright (c) Qualcomm Technologies, Inc. and/or its subsidiaries.
>> + */
>> +
>> +#include <linux/bitfield.h>
>> +#include <linux/bits.h>
>> +#include <linux/device.h>
>> +#include <linux/err.h>
>> +#include <linux/i2c.h>
>> +#include <linux/interrupt.h>
>> +#include <linux/kernel.h>
>> +#include <linux/module.h>
>> +#include <linux/pm.h>
>> +#include <linux/slab.h>
>> +#include <linux/thermal.h>
>> +
>> +#define EC_SCI_EVT_READ_CMD	0x05
>> +#define EC_FW_VERSION_CMD	0x0e
>> +#define EC_MODERN_STANDBY_CMD	0x23
>> +#define EC_FAN_DBG_CONTROL_CMD	0x30
>> +#define EC_SCI_EVT_CONTROL_CMD	0x35
>> +#define EC_THERMAL_CAP_CMD	0x42
>> +
>> +#define EC_FW_VERSION_RESP_LEN	4
>> +#define EC_THERMAL_CAP_RESP_LEN	3
>> +#define EC_FAN_DEBUG_CMD_LEN	6
>> +#define EC_FAN_SPEED_DATA_SIZE	4
>> +
>> +#define EC_MODERN_STANDBY_ENTER	0x01
>> +#define EC_MODERN_STANDBY_EXIT	0x00
>> +
>> +#define EC_FAN_DEBUG_MODE_OFF   0
>> +#define EC_FAN_DEBUG_MODE_ON    BIT(0)
> 
> Add include for BIT().
>

Added <linux/bits.h> in v6 to address this.

>> +#define EC_FAN_ON               BIT(1)
>> +#define EC_FAN_DEBUG_TYPE_PWM   BIT(2)
>> +#define EC_MAX_FAN_CNT		2
>> +#define EC_FAN_NAME_SIZE	20
>> +#define EC_FAN_MAX_PWM		255
>> +
>> +enum qcom_ec_sci_events {
>> +	EC_FAN1_STATUS_CHANGE_EVT = 0x30,
>> +	EC_FAN2_STATUS_CHANGE_EVT,
>> +	EC_FAN1_SPEED_CHANGE_EVT,
>> +	EC_FAN2_SPEED_CHANGE_EVT,
>> +	EC_NEW_LUT_SET_EVT,
>> +	EC_FAN_PROFILE_SWITCH_EVT,
>> +	EC_THERMISTOR_1_THRESHOLD_CROSS_EVT,
>> +	EC_THERMISTOR_2_THRESHOLD_CROSS_EVT,
>> +	EC_THERMISTOR_3_THRESHOLD_CROSS_EVT,
>> +	/* Reserved: 0x39 - 0x3c/0x3f */
>> +	EC_RECOVERED_FROM_RESET_EVT = 0x3d,
>> +};
>> +
>> +struct qcom_ec_version {
>> +	u8 main_version;
>> +	u8 sub_version;
>> +	u8 test_version;
>> +};
>> +
>> +struct qcom_ec_thermal_cap {
>> +#define EC_THERMAL_FAN_CNT(x)		(FIELD_GET(GENMASK(1, 0), (x)))
>> +#define EC_THERMAL_FAN_TYPE(x)		(FIELD_GET(GENMASK(4, 2), (x)))
>> +#define EC_THERMAL_THERMISTOR_MASK(x)	(FIELD_GET(GENMASK(7, 0), (x)))
>> +	u8 fan_cnt;
>> +	u8 fan_type;
>> +	u8 thermistor_mask;
>> +};
>> +
>> +struct qcom_ec_cooling_dev {
>> +	struct thermal_cooling_device *cdev;
>> +	struct device *parent_dev;
>> +	u8 fan_id;
>> +	u8 state;
>> +};
>> +
>> +struct qcom_ec {
>> +	struct qcom_ec_cooling_dev *ec_cdev;
>> +	struct qcom_ec_thermal_cap thermal_cap;
>> +	struct qcom_ec_version version;
>> +	struct i2c_client *client;
>> +};
>> +
>> +static int qcom_ec_read(struct qcom_ec *ec, u8 cmd, u8 resp_len, u8 *resp)
>> +{
>> +	int ret;
>> +
>> +	ret = i2c_smbus_read_i2c_block_data(ec->client, cmd, resp_len, resp);
>> +
>> +	if (ret < 0)
>> +		return ret;
>> +	else if (ret == 0 || ret == 0xff)
>> +		return -EOPNOTSUPP;
>> +
>> +	if (resp[0] >= resp_len)
>> +		return -EINVAL;
>> +
>> +	return 0;
>> +}
>> +
>> +/*
>> + * EC Device Firmware Version:
>> + *
>> + * Read Response:
>> + * ----------------------------------------------------------------------
>> + * | Offset	| Name		| Description				|
>> + * ----------------------------------------------------------------------
>> + * | 0x00	| Byte count	| Number of bytes in response		|
>> + * |		|		| (excluding byte count)		|
>> + * ----------------------------------------------------------------------
>> + * | 0x01	| Test-version	| Test-version of EC firmware		|
>> + * ----------------------------------------------------------------------
>> + * | 0x02	| Sub-version	| Sub-version of EC firmware		|
>> + * ----------------------------------------------------------------------
>> + * | 0x03	| Main-version	| Main-version of EC firmware		|
>> + * ----------------------------------------------------------------------
>> + *
>> + */
>> +static int qcom_ec_read_fw_version(struct device *dev)
>> +{
>> +	struct i2c_client *client = to_i2c_client(dev);
>> +	struct qcom_ec *ec = i2c_get_clientdata(client);
>> +	struct qcom_ec_version *version = &ec->version;
>> +	u8 resp[EC_FW_VERSION_RESP_LEN];
>> +	int ret;
>> +
>> +	ret = qcom_ec_read(ec, EC_FW_VERSION_CMD, EC_FW_VERSION_RESP_LEN, resp);
>> +	if (ret < 0)
>> +		return ret;
>> +
>> +	version->main_version = resp[3];
>> +	version->sub_version = resp[2];
>> +	version->test_version = resp[1];
>> +
>> +	dev_dbg(dev, "EC Version %d.%d.%d\n",
>> +		version->main_version, version->sub_version, version->test_version);
>> +
>> +	return 0;
>> +}
>> +
>> +/*
>> + * EC Device Thermal Capabilities:
>> + *
>> + * Read Response:
>> + * ------------------------------------------------------------------------------
>> + * | Offset		| Name		| Description				|
>> + * ------------------------------------------------------------------------------
>> + * | 0x00		| Byte count	| Number of bytes in response		|
>> + * |			|		| (excluding byte count)		|
>> + * ------------------------------------------------------------------------------
>> + * | 0x02 (LSB)	| EC Thermal	| Bit 0-1: Number of fans		|
>> + * | 0x3		| Capabilities	| Bit 2-4: Type of fan			|
> 
> 0x03 ?
>

Typo, Will fix to 0x03 in next respin.

>> + * |			|		| Bit 5-6: Reserved			|
>> + * |			|		| Bit 7: Data Valid/Invalid		|
>> + * |			|		|	 (Valid - 1, Invalid - 0)	|
>> + * |			|		| Bit 8-15: Thermistor 0 - 7 presence	|
>> + * |			|		|	    (1 present, 0 absent)	|
>> + * ------------------------------------------------------------------------------
>> + *
>> + */
>> +static int qcom_ec_thermal_capabilities(struct device *dev)
>> +{
>> +	struct i2c_client *client = to_i2c_client(dev);
>> +	struct qcom_ec *ec = i2c_get_clientdata(client);
>> +	struct qcom_ec_thermal_cap *cap = &ec->thermal_cap;
>> +	u8 resp[EC_THERMAL_CAP_RESP_LEN];
>> +	int ret;
>> +
>> +	ret = qcom_ec_read(ec, EC_THERMAL_CAP_CMD, EC_THERMAL_CAP_RESP_LEN, resp);
>> +	if (ret < 0)
>> +		return ret;
>> +
>> +	cap->fan_cnt = min(EC_MAX_FAN_CNT, EC_THERMAL_FAN_CNT(resp[1]));
>> +	cap->fan_type = EC_THERMAL_FAN_TYPE(resp[1]);
>> +	cap->thermistor_mask = EC_THERMAL_THERMISTOR_MASK(resp[2]);
>> +
>> +	dev_dbg(dev, "Fan count: %d Fan Type: %d Thermistor Mask: %x\n",
> 
> Please add include for dev_dbg().
> 
> It seems you've missed at least some of my comments to v5, please recheck
> those comments. I won't look further for now.
> 
> --
>  i.
>

Added <linux/device.h> for dev_dbg() in v6, will include
<linux/dev_printk.h> as well in in v8. That said, all your v5 comments
have been addressed, here is a summary of what was fixed:

- Add <linux/bits.h> for BIT()
- Add <linux/err.h> for IS_ERR()
- Switch thermistor mask format specifier from %d to %x
- Add missing braces
- Remove empty line within variable declarations
- Change loop counter i to unsigned int
- Replace snprintf() with scnprintf()
- Use sizeof(name) instead of the EC_FAN_NAME_SIZE macro directly
- Condense devm_thermal_of_cooling_device_register() to 2 lines

Apologies if it appeared otherwise. If anything was missed, please do
point it out and I will address it in the next respin.

>> +		cap->fan_cnt, cap->fan_type, cap->thermistor_mask);
>> +
>> +	return 0;
>> +}
>> +
>> +static irqreturn_t qcom_ec_irq(int irq, void *data)
>> +{
>> +	struct qcom_ec *ec = data;
>> +	struct device *dev = &ec->client->dev;
>> +	int val;
>> +
>> +	val = i2c_smbus_read_byte_data(ec->client, EC_SCI_EVT_READ_CMD);
>> +	if (val < 0) {
>> +		dev_err_ratelimited(dev, "Failed to read EC SCI Event: %d\n", val);
>> +		return IRQ_HANDLED;
>> +	}
>> +
>> +	switch (val) {
>> +	case EC_FAN1_STATUS_CHANGE_EVT:
>> +		dev_dbg_ratelimited(dev, "Fan1 status changed\n");
>> +		break;
>> +	case EC_FAN2_STATUS_CHANGE_EVT:
>> +		dev_dbg_ratelimited(dev, "Fan2 status changed\n");
>> +		break;
>> +	case EC_FAN1_SPEED_CHANGE_EVT:
>> +		dev_dbg_ratelimited(dev, "Fan1 speed crossed low/high trip point\n");
>> +		break;
>> +	case EC_FAN2_SPEED_CHANGE_EVT:
>> +		dev_dbg_ratelimited(dev, "Fan2 speed crossed low/high trip point\n");
>> +		break;
>> +	case EC_NEW_LUT_SET_EVT:
>> +		dev_dbg_ratelimited(dev, "New LUT set\n");
>> +		break;
>> +	case EC_FAN_PROFILE_SWITCH_EVT:
>> +		dev_dbg_ratelimited(dev, "FAN Profile switched\n");
>> +		break;
>> +	case EC_THERMISTOR_1_THRESHOLD_CROSS_EVT:
>> +		dev_dbg_ratelimited(dev, "Thermistor 1 threshold crossed\n");
>> +		break;
>> +	case EC_THERMISTOR_2_THRESHOLD_CROSS_EVT:
>> +		dev_dbg_ratelimited(dev, "Thermistor 2 threshold crossed\n");
>> +		break;
>> +	case EC_THERMISTOR_3_THRESHOLD_CROSS_EVT:
>> +		dev_dbg_ratelimited(dev, "Thermistor 3 threshold crossed\n");
>> +		break;
>> +	case EC_RECOVERED_FROM_RESET_EVT:
>> +		dev_dbg_ratelimited(dev, "EC recovered from reset\n");
>> +		break;
>> +	default:
>> +		dev_notice_ratelimited(dev, "Unknown EC event: %d\n", val);
>> +		break;
>> +	}
>> +
>> +	return IRQ_HANDLED;
>> +}
>> +
>> +static int qcom_ec_sci_evt_control(struct device *dev, bool enable)
>> +{
>> +	struct i2c_client *client = to_i2c_client(dev);
>> +
>> +	return i2c_smbus_write_byte_data(client, EC_SCI_EVT_CONTROL_CMD, !!enable);
>> +}
>> +
>> +static int qcom_ec_fan_get_max_state(struct thermal_cooling_device *cdev, unsigned long *state)
>> +{
>> +	*state = EC_FAN_MAX_PWM;
>> +
>> +	return 0;
>> +}
>> +
>> +static int qcom_ec_fan_get_cur_state(struct thermal_cooling_device *cdev, unsigned long *state)
>> +{
>> +	struct qcom_ec_cooling_dev *ec_cdev = cdev->devdata;
>> +
>> +	*state = ec_cdev->state;
>> +
>> +	return 0;
>> +}
>> +
>> +/*
>> + * Fan Debug control command:
>> + *
>> + * Command Payload:
>> + * --------------------------------------------------------------------------------------
>> + * | Offset		| Name		| Description					|
>> + * --------------------------------------------------------------------------------------
>> + * | 0x00		| Command	| Fan control command				|
>> + * --------------------------------------------------------------------------------------
>> + * | 0x01		| Fan ID	| 0x1 : Fan 1					|
>> + * |			|		| 0x2 : Fan 2					|
>> + * --------------------------------------------------------------------------------------
>> + * | 0x02		| Byte count = 4| Size of data to set fan speed			|
>> + * --------------------------------------------------------------------------------------
>> + * | 0x03		| Mode		| Bit 0: Debug Mode On/Off (0 - OFF, 1 - ON )	|
>> + * |			|		| Bit 1: Fan On/Off (0 - Off, 1 - ON)		|
>> + * |			|		| Bit 2: Debug Type (0 - RPM, 1 - PWM)		|
>> + * --------------------------------------------------------------------------------------
>> + * | 0x04 (LSB)	| Speed in RPM	| RPM value, if mode selected is RPM		|
>> + * | 0x05		|		|						|
>> + * --------------------------------------------------------------------------------------
>> + * | 0x06		| Speed in PWM	| PWM value, if mode selected is PWM (0 - 255)	|
>> + * ______________________________________________________________________________________
>> + *
>> + */
>> +static int qcom_ec_fan_debug_mode_off(struct qcom_ec_cooling_dev *ec_cdev)
>> +{
>> +	struct device *dev = ec_cdev->parent_dev;
>> +	struct i2c_client *client = to_i2c_client(dev);
>> +	u8 request[6] = { ec_cdev->fan_id, EC_FAN_SPEED_DATA_SIZE,
>> +			  EC_FAN_DEBUG_MODE_OFF, 0, 0, 0 };
>> +	int ret;
>> +
>> +	ret = i2c_smbus_write_i2c_block_data(client, EC_FAN_DBG_CONTROL_CMD,
>> +					     sizeof(request), request);
>> +	if (ret) {
>> +		dev_err(dev, "Failed to turn off fan%d debug mode: %d\n",
>> +			ec_cdev->fan_id, ret);
>> +	}
>> +
>> +	return ret;
>> +}
>> +
>> +static int qcom_ec_fan_set_cur_state(struct thermal_cooling_device *cdev, unsigned long state)
>> +{
>> +	struct qcom_ec_cooling_dev *ec_cdev = cdev->devdata;
>> +	struct device *dev = ec_cdev->parent_dev;
>> +	struct i2c_client *client = to_i2c_client(dev);
>> +	u8 request[6] = { ec_cdev->fan_id, EC_FAN_SPEED_DATA_SIZE,
>> +			  EC_FAN_DEBUG_MODE_ON | EC_FAN_ON | EC_FAN_DEBUG_TYPE_PWM,
>> +			  0, 0, state };
>> +	int ret;
>> +
>> +	ret = i2c_smbus_write_i2c_block_data(client, EC_FAN_DBG_CONTROL_CMD,
>> +					     sizeof(request), request);
>> +	if (ret) {
>> +		dev_err(dev, "Failed to set fan pwm: %d\n", ret);
>> +		return ret;
>> +	}
>> +
>> +	ec_cdev->state = state;
>> +
>> +	return 0;
>> +}
>> +
>> +static const struct thermal_cooling_device_ops qcom_ec_thermal_ops = {
>> +	.get_max_state = qcom_ec_fan_get_max_state,
>> +	.get_cur_state = qcom_ec_fan_get_cur_state,
>> +	.set_cur_state = qcom_ec_fan_set_cur_state,
>> +};
>> +
>> +static int qcom_ec_resume(struct device *dev)
>> +{
>> +	struct i2c_client *client = to_i2c_client(dev);
>> +
>> +	return i2c_smbus_write_byte_data(client, EC_MODERN_STANDBY_CMD,
>> +					 EC_MODERN_STANDBY_ENTER);
>> +}
>> +
>> +static int qcom_ec_suspend(struct device *dev)
>> +{
>> +	struct i2c_client *client = to_i2c_client(dev);
>> +
>> +	return i2c_smbus_write_byte_data(client, EC_MODERN_STANDBY_CMD,
>> +					 EC_MODERN_STANDBY_EXIT);
>> +}
>> +
>> +static int qcom_ec_probe(struct i2c_client *client)
>> +{
>> +	struct device *dev = &client->dev;
>> +	struct qcom_ec *ec;
>> +	unsigned int i;
>> +	int ret;
>> +
>> +	ec = devm_kzalloc(dev, sizeof(*ec), GFP_KERNEL);
>> +	if (!ec)
>> +		return -ENOMEM;
>> +
>> +	ec->client = client;
>> +
>> +	ret = devm_request_threaded_irq(dev, client->irq, NULL, qcom_ec_irq,
>> +					IRQF_ONESHOT, "qcom_ec", ec);
>> +	if (ret < 0)
>> +		return ret;
>> +
>> +	i2c_set_clientdata(client, ec);
>> +
>> +	ret = qcom_ec_read_fw_version(dev);
>> +	if (ret < 0)
>> +		return dev_err_probe(dev, ret, "Failed to read EC firmware version\n");
>> +
>> +	ret = qcom_ec_sci_evt_control(dev, true);
>> +	if (ret < 0)
>> +		return dev_err_probe(dev, ret, "Failed to enable SCI events\n");
>> +
>> +	ret = qcom_ec_thermal_capabilities(dev);
>> +	if (ret < 0)
>> +		return dev_err_probe(dev, ret, "Failed to read thermal capabilities\n");
>> +
>> +	if (ec->thermal_cap.fan_cnt == 0) {
>> +		dev_warn(dev, FW_BUG "Failed to get fan count, firmware update required\n");
>> +		return 0;
>> +	}
>> +
>> +	ec->ec_cdev = devm_kcalloc(dev, ec->thermal_cap.fan_cnt, sizeof(*ec->ec_cdev), GFP_KERNEL);
>> +	if (!ec->ec_cdev)
>> +		return -ENOMEM;
>> +
>> +	for (i = 0; i < ec->thermal_cap.fan_cnt; i++) {
>> +		struct qcom_ec_cooling_dev *ec_cdev = &ec->ec_cdev[i];
>> +		char name[EC_FAN_NAME_SIZE];
>> +
>> +		scnprintf(name, sizeof(name), "qcom_ec_fan_%u", i);
>> +		ec_cdev->fan_id = i + 1;
>> +		ec_cdev->parent_dev = dev;
>> +
>> +		ec_cdev->cdev = devm_thermal_of_cooling_device_register(dev, NULL, name, ec_cdev,
>> +									&qcom_ec_thermal_ops);
>> +		if (IS_ERR(ec_cdev->cdev)) {
>> +			return dev_err_probe(dev, PTR_ERR(ec_cdev->cdev),
>> +					     "Failed to register fan%d cooling device\n", i);
>> +		}
>> +	}
>> +
>> +	return 0;
>> +}
>> +
>> +static void qcom_ec_remove(struct i2c_client *client)
>> +{
>> +	struct qcom_ec *ec = i2c_get_clientdata(client);
>> +	struct device *dev = &client->dev;
>> +	int ret;
>> +
>> +	ret = qcom_ec_sci_evt_control(dev, false);
>> +	if (ret < 0)
>> +		dev_err(dev, "Failed to disable SCI events: %d\n", ret);
>> +
>> +	for (int i = 0; i < ec->thermal_cap.fan_cnt; i++) {
>> +		struct qcom_ec_cooling_dev *ec_cdev = &ec->ec_cdev[i];
>> +
>> +		qcom_ec_fan_debug_mode_off(ec_cdev);
>> +	}
>> +}
>> +
>> +static const struct of_device_id qcom_ec_of_match[] = {
>> +	{ .compatible = "qcom,hamoa-crd-ec" },
>> +	{}
>> +};
>> +MODULE_DEVICE_TABLE(of, qcom_ec_of_match);
>> +
>> +static const struct i2c_device_id qcom_ec_i2c_id_table[] = {
>> +	{ "qcom-hamoa-ec", },
>> +	{}
>> +};
>> +MODULE_DEVICE_TABLE(i2c, qcom_ec_i2c_id_table);
>> +
>> +static DEFINE_SIMPLE_DEV_PM_OPS(qcom_ec_pm_ops,
>> +		qcom_ec_suspend,
>> +		qcom_ec_resume);
>> +
>> +static struct i2c_driver qcom_ec_i2c_driver = {
>> +	.driver = {
>> +		.name = "qcom-hamoa-ec",
>> +		.of_match_table = qcom_ec_of_match,
>> +		.pm = &qcom_ec_pm_ops
>> +	},
>> +	.probe = qcom_ec_probe,
>> +	.remove = qcom_ec_remove,
>> +	.id_table = qcom_ec_i2c_id_table,
>> +};
>> +module_i2c_driver(qcom_ec_i2c_driver);
>> +
>> +MODULE_DESCRIPTION("QCOM Hamoa Embedded Controller");
>> +MODULE_LICENSE("GPL");
>>
>>

-- 
Best Regards,
Anvesh