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Signed-off-by: Florin Leotescu Reviewed-by: Frank Li --- .../bindings/hwmon/microchip,emc2305.yaml | 113 ++++++++++++++++++ 1 file changed, 113 insertions(+) create mode 100644 Documentation/devicetree/bindings/hwmon/microchip,emc2305.yaml diff --git a/Documentation/devicetree/bindings/hwmon/microchip,emc2305.yaml b/Documentation/devicetree/bindings/hwmon/microchip,emc2305.yaml new file mode 100644 index 000000000000..e61ef97e63af --- /dev/null +++ b/Documentation/devicetree/bindings/hwmon/microchip,emc2305.yaml @@ -0,0 +1,113 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- + +$id: http://devicetree.org/schemas/hwmon/microchip,emc2305.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Microchip EMC2305 SMBus compliant PWM fan controller + +maintainers: + - Michael Shych + +description: + Microchip EMC2301/2/3/5 pwm controller which supports + up to five programmable fan control circuits. + +properties: + compatible: + oneOf: + - enum: + - microchip,emc2305 + - items: + - enum: + - microchip,emc2303 + - microchip,emc2302 + - microchip,emc2301 + - const: microchip,emc2305 + + reg: + maxItems: 1 + + '#address-cells': + const: 1 + + '#size-cells': + const: 0 + + '#pwm-cells': + const: 3 + description: | + Number of cells in a PWM specifier. + - cell 0: The PWM frequency + - cell 1: The PWM polarity: 0 or PWM_POLARITY_INVERTED + - cell 2: The PWM output config: + - 0 (Open-Drain) + - 1 (Push-Pull) + + +patternProperties: + '^fan@[0-4]$': + $ref: fan-common.yaml# + unevaluatedProperties: false + properties: + reg: + description: + The fan number used to determine the associated PWM channel. + + required: + - reg + - pwms + +required: + - compatible + - reg + +additionalProperties: false + +examples: + - | + #include + i2c { + #address-cells = <1>; + #size-cells = <0>; + + fan_controller: fan-controller@2f { + compatible = "microchip,emc2305"; + reg = <0x2f>; + #address-cells = <1>; + #size-cells = <0>; + #pwm-cells = <3>; + + fan@0 { + reg = <0x0>; + pwms = <&fan_controller 26000 PWM_POLARITY_INVERTED 1>; + #cooling-cells = <2>; + }; + + fan@1 { + reg = <0x1>; + pwms = <&fan_controller 26000 0 1>; + #cooling-cells = <2>; + }; + + fan@2 { + reg = <0x2>; + pwms = <&fan_controller 26000 0 1>; + #cooling-cells = <2>; + }; + + fan@3 { + reg = <0x3>; + pwms = <&fan_controller 26000 0 1>; + #cooling-cells = <2>; + }; + + fan@4 { + reg = <0x4>; + pwms = <&fan_controller 26000 0 1>; + #cooling-cells = <2>; + }; + }; + }; +... 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X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org From: Florin Leotescu Introduce OF support for Microchip emc2305 pwm fan controller. Signed-off-by: Florin Leotescu Reviewed-by: Frank Li --- drivers/hwmon/emc2305.c | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/drivers/hwmon/emc2305.c b/drivers/hwmon/emc2305.c index 4d39fbd83769..f8a4c76fcadd 100644 --- a/drivers/hwmon/emc2305.c +++ b/drivers/hwmon/emc2305.c @@ -607,9 +607,16 @@ static void emc2305_remove(struct i2c_client *client) emc2305_unset_tz(dev); } +static const struct of_device_id of_emc2305_match_table[] = { + { .compatible = "microchip,emc2305", }, + {}, +}; +MODULE_DEVICE_TABLE(of, of_emc2305_match_table); + static struct i2c_driver emc2305_driver = { .driver = { .name = "emc2305", + .of_match_table = of_emc2305_match_table, }, .probe = emc2305_probe, .remove = emc2305_remove, From patchwork Tue Mar 18 08:54:44 2025 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Florin Leotescu (OSS)" X-Patchwork-Id: 14020614 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 2713EC28B28 for ; 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Switch to devm_thermal_of_cooling_device_register to simplify the cleanup procedure, allowing the removal of emc2305_unset_tz and emc2305_remove, which are no longer needed. Signed-off-by: Florin Leotescu Reviewed-by: Frank Li --- drivers/hwmon/emc2305.c | 33 ++++----------------------------- 1 file changed, 4 insertions(+), 29 deletions(-) diff --git a/drivers/hwmon/emc2305.c b/drivers/hwmon/emc2305.c index f8a4c76fcadd..234c54956a4b 100644 --- a/drivers/hwmon/emc2305.c +++ b/drivers/hwmon/emc2305.c @@ -112,8 +112,6 @@ static char *emc2305_fan_name[] = { "emc2305_fan5", }; -static void emc2305_unset_tz(struct device *dev); - static int emc2305_get_max_channel(const struct emc2305_data *data) { return data->pwm_num; @@ -293,8 +291,9 @@ static int emc2305_set_single_tz(struct device *dev, int idx) pwm = data->pwm_min[cdev_idx]; data->cdev_data[cdev_idx].cdev = - thermal_cooling_device_register(emc2305_fan_name[idx], data, - &emc2305_cooling_ops); + devm_thermal_of_cooling_device_register(dev, dev->of_node, + emc2305_fan_name[idx], data, + &emc2305_cooling_ops); if (IS_ERR(data->cdev_data[cdev_idx].cdev)) { dev_err(dev, "Failed to register cooling device %s\n", emc2305_fan_name[idx]); @@ -332,24 +331,9 @@ static int emc2305_set_tz(struct device *dev) for (i = 0; i < data->pwm_num; i++) { ret = emc2305_set_single_tz(dev, i + 1); if (ret) - goto thermal_cooling_device_register_fail; + return ret; } return 0; - -thermal_cooling_device_register_fail: - emc2305_unset_tz(dev); - return ret; -} - -static void emc2305_unset_tz(struct device *dev) -{ - struct emc2305_data *data = dev_get_drvdata(dev); - int i; - - /* Unregister cooling device. */ - for (i = 0; i < EMC2305_PWM_MAX; i++) - if (data->cdev_data[i].cdev) - thermal_cooling_device_unregister(data->cdev_data[i].cdev); } static umode_t @@ -599,14 +583,6 @@ static int emc2305_probe(struct i2c_client *client) return 0; } -static void emc2305_remove(struct i2c_client *client) -{ - struct device *dev = &client->dev; - - if (IS_REACHABLE(CONFIG_THERMAL)) - emc2305_unset_tz(dev); -} - static const struct of_device_id of_emc2305_match_table[] = { { .compatible = "microchip,emc2305", }, {}, @@ -619,7 +595,6 @@ static struct i2c_driver emc2305_driver = { .of_match_table = of_emc2305_match_table, }, .probe = emc2305_probe, - .remove = emc2305_remove, .id_table = emc2305_ids, };