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[103.229.18.19]) by smtp.gmail.com with ESMTPSA id d9443c01a7336-2b242765b0csm172865905ad.50.2026.03.31.23.47.48 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Tue, 31 Mar 2026 23:47:54 -0700 (PDT) Message-ID: <078095b1-02f4-4ffd-827a-341a282dfbdd@oss.qualcomm.com> Date: Wed, 1 Apr 2026 12:17:47 +0530 Precedence: bulk X-Mailing-List: linux-arm-msm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v7 2/5] platform: arm64: Add driver for EC found on Qualcomm reference devices To: Akhil P Oommen , Sibi Sankar , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Hans de Goede , =?UTF-8?Q?Ilpo_J=C3=A4rvinen?= , Bryan O'Donoghue , Bjorn Andersson , Konrad Dybcio , Randy Dunlap Cc: linux-arm-msm@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, platform-driver-x86@vger.kernel.org, Maya Matuszczyk , Dmitry Baryshkov , Konrad Dybcio References: <20260327-add-driver-for-ec-v7-0-7684c915e42c@oss.qualcomm.com> <20260327-add-driver-for-ec-v7-2-7684c915e42c@oss.qualcomm.com> <0b7b8415-7039-4bad-8079-ea3280891f68@oss.qualcomm.com> Content-Language: en-US From: Anvesh Jain P In-Reply-To: <0b7b8415-7039-4bad-8079-ea3280891f68@oss.qualcomm.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwNDAxMDA1OCBTYWx0ZWRfX+SsQC+mwZkHw FzsxoRIRHcmUdkVf7k8oJXrpaA5y36h1f6erZW6nJtMx2Y98DI0g5HjuwcOGlMey5jFNnECTdBd EVN4l4BpyC4MfbXVqe/GldmFa07fMIPmBaLmXSCFGvX3sFetbcT86JHRDo+fW/hxmQFmyPvQ3UT KZV9nL4u+9SC3ptuMCafAcunYV6mJoaU7GDGOtQmUVsEeGxrpCb669Uuq5Xn4SoBFw8eWB2gmMN DBCt4xVlaS+K6XIoz8nAij3OUagAm6vG0bE9zGjs/vMk3jzPpsBxotUmsSTBSGSQfIl2KmYrvJS d61fMlQ33az9QhLyKoFKbs+E/YAKoczyyA3q2X6LVBUovrUBWEfCXrgyej3B8iq/4W8wgJXyJZB tQe9ZCtDqy9+nS7kj175+11Umg3+Kq7iiaVecpTqhJHTldRTcxreCuGS1TSAq/425bBpm3Rc4fx 2lc5WsaC4+AiNrPmGMA== X-Authority-Analysis: v=2.4 cv=G4ER0tk5 c=1 sm=1 tr=0 ts=69ccbf9c cx=c_pps a=IZJwPbhc+fLeJZngyXXI0A==:117 a=Ou0eQOY4+eZoSc0qltEV5Q==:17 a=IkcTkHD0fZMA:10 a=A5OVakUREuEA:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=u7WPNUs3qKkmUXheDGA7:22 a=_K5XuSEh1TEqbUxoQ0s3:22 a=EUspDBNiAAAA:8 a=pGLkceISAAAA:8 a=VwQbUJbxAAAA:8 a=IocnhmzPMY9-xWXTdeIA:9 a=3ZKOabzyN94A:10 a=QEXdDO2ut3YA:10 a=uG9DUKGECoFWVXl0Dc02:22 X-Proofpoint-GUID: hqAinXHb93NMqNqKnHAlCJESVOlLt9ak X-Proofpoint-ORIG-GUID: hqAinXHb93NMqNqKnHAlCJESVOlLt9ak X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1143,Hydra:6.1.51,FMLib:17.12.100.49 definitions=2026-04-01_02,2026-03-31_02,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 lowpriorityscore=0 bulkscore=0 clxscore=1015 priorityscore=1501 malwarescore=0 adultscore=0 impostorscore=0 spamscore=0 phishscore=0 suspectscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2603050001 definitions=main-2604010058 On 3/31/2026 9:07 PM, Akhil P Oommen wrote: > On 3/27/2026 3:38 PM, Anvesh Jain P wrote: >> From: Sibi Sankar >> >> 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 >> Signed-off-by: Maya Matuszczyk >> Signed-off-by: Sibi Sankar >> Reviewed-by: Dmitry Baryshkov >> Acked-by: Konrad Dybcio >> Co-developed-by: Anvesh Jain P >> Signed-off-by: Anvesh Jain P >> --- >> 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 >> +M: Sibi Sankar >> +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 >> 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 > > Enable this in arm64 defconfig? > > Anyway, for the whole series: > > Tested-by: Akhil P Oommen > > Nice work. I have been looking for a way to force fan always ON since > Hamoa. :) > > -Akhil. > > Thanks for Testing this! Will add it in v8. Regarding enabling in arm64 defconfig — that's a good point. I'll add a patch to the series enabling EC_QCOM_HAMOA in the arm64 defconfig in next respin once consensus is achieved. Glad the fan control is useful! -- Anvesh >> + 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 >> + * Copyright (c) Qualcomm Technologies, Inc. and/or its subsidiaries. >> + */ >> + >> +#include >> +#include >> +#include >> +#include >> +#include >> +#include >> +#include >> +#include >> +#include >> +#include >> +#include >> + >> +#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) >> +#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 | >> + * | | | 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", >> + 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"); >> >