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[78.94.0.51]) by smtp.gmail.com with ESMTPSA id fn15-20020a05600c688f00b003b47ff307e1sm3133045wmb.31.2022.11.16.13.36.21 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 16 Nov 2022 13:36:21 -0800 (PST) From: Naresh Solanki X-Google-Original-From: Naresh Solanki To: devicetree@vger.kernel.org, Guenter Roeck , Jean Delvare , Rob Herring , Krzysztof Kozlowski , Naresh Solanki Cc: linux-kernel@vger.kernel.org, linux-hwmon@vger.kernel.org, Patrick Rudolph , Naresh Solanki Subject: [PATCH v6 1/3] dt-bindings: hwmon: fan: Add fan binding to schema Date: Wed, 16 Nov 2022 22:36:13 +0100 Message-Id: <20221116213615.1256297-2-Naresh.Solanki@9elements.com> X-Mailer: git-send-email 2.37.3 In-Reply-To: <20221116213615.1256297-1-Naresh.Solanki@9elements.com> References: <20221116213615.1256297-1-Naresh.Solanki@9elements.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.org Add common fan properties bindings to a schema. Bindings for fan controllers can reference the common schema for the fan child nodes: patternProperties: "^fan@[0-2]": type: object $ref: fan-common.yaml# Signed-off-by: Naresh Solanki --- .../devicetree/bindings/hwmon/fan-common.yaml | 42 +++++++++++++++++++ 1 file changed, 42 insertions(+) create mode 100644 Documentation/devicetree/bindings/hwmon/fan-common.yaml diff --git a/Documentation/devicetree/bindings/hwmon/fan-common.yaml b/Documentation/devicetree/bindings/hwmon/fan-common.yaml new file mode 100644 index 000000000000..1954882eed77 --- /dev/null +++ b/Documentation/devicetree/bindings/hwmon/fan-common.yaml @@ -0,0 +1,42 @@ +# SPDX-License-Identifier: GPL-2.0-or-later OR BSD-2-Clause +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/hwmon/fan-common.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Common fan properties + +maintainers: + - Naresh Solanki + +properties: + max-rpm: + description: + Max RPM supported by fan. + $ref: /schemas/types.yaml#/definitions/uint32 + + pulses-per-revolution: + description: + The number of pulse from fan sensor per revolution. + $ref: /schemas/types.yaml#/definitions/uint32 + + target-rpm: + description: + Target RPM the fan should be configured during driver probe. + $ref: /schemas/types.yaml#/definitions/uint32 + + pwms: + description: + PWM provider. + + label: + description: + Optional fan label + + fan-supply: + description: + Power supply for fan. + +additionalProperties: true + +... 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[78.94.0.51]) by smtp.gmail.com with ESMTPSA id fn15-20020a05600c688f00b003b47ff307e1sm3133045wmb.31.2022.11.16.13.36.23 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 16 Nov 2022 13:36:24 -0800 (PST) From: Naresh Solanki X-Google-Original-From: Naresh Solanki To: devicetree@vger.kernel.org, Guenter Roeck , Jean Delvare , Thierry Reding , =?utf-8?q?Uwe_Kleine-K=C3=B6nig?= Cc: linux-kernel@vger.kernel.org, linux-hwmon@vger.kernel.org, Patrick Rudolph , Naresh Solanki , Marcello Sylvester Bauer , linux-pwm@vger.kernel.org Subject: [PATCH v6 3/3] hwmon: (max6639) Change from pdata to dt configuration Date: Wed, 16 Nov 2022 22:36:15 +0100 Message-Id: <20221116213615.1256297-4-Naresh.Solanki@9elements.com> X-Mailer: git-send-email 2.37.3 In-Reply-To: <20221116213615.1256297-1-Naresh.Solanki@9elements.com> References: <20221116213615.1256297-1-Naresh.Solanki@9elements.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.org max6639_platform_data is not used by any in-kernel driver and does not address the MAX6639 fans separately. Move to device tree configuration with explicit properties to configure each fan. Non-DT platform can still use this module with its default configuration. Signed-off-by: Marcello Sylvester Bauer Signed-off-by: Naresh Solanki --- drivers/hwmon/Kconfig | 1 + drivers/hwmon/max6639.c | 460 +++++++++++++++++++++----- include/linux/platform_data/max6639.h | 15 - 3 files changed, 387 insertions(+), 89 deletions(-) delete mode 100644 include/linux/platform_data/max6639.h diff --git a/drivers/hwmon/Kconfig b/drivers/hwmon/Kconfig index 3176c33af6c6..56d9004b7a38 100644 --- a/drivers/hwmon/Kconfig +++ b/drivers/hwmon/Kconfig @@ -1115,6 +1115,7 @@ config SENSORS_MAX6621 config SENSORS_MAX6639 tristate "Maxim MAX6639 sensor chip" depends on I2C + depends on PWM help If you say yes here you get support for the MAX6639 sensor chips. diff --git a/drivers/hwmon/max6639.c b/drivers/hwmon/max6639.c index 9b895402c80d..058d1a5c6082 100644 --- a/drivers/hwmon/max6639.c +++ b/drivers/hwmon/max6639.c @@ -19,7 +19,7 @@ #include #include #include -#include +#include /* Addresses to scan */ static const unsigned short normal_i2c[] = { 0x2c, 0x2e, 0x2f, I2C_CLIENT_END }; @@ -54,11 +54,18 @@ static const unsigned short normal_i2c[] = { 0x2c, 0x2e, 0x2f, I2C_CLIENT_END }; #define MAX6639_GCONFIG_PWM_FREQ_HI 0x08 #define MAX6639_FAN_CONFIG1_PWM 0x80 - +#define MAX6639_REG_FAN_CONFIG2a_PWM_POL 0x02 #define MAX6639_FAN_CONFIG3_THERM_FULL_SPEED 0x40 +#define MAX6639_FAN_CONFIG3_FREQ_MASK 0x03 +#define MAX6639_REG_TARGTDUTY_SLOT 120 +/* Tach supported range. This internally controls tach frequency */ static const int rpm_ranges[] = { 2000, 4000, 8000, 16000 }; +/* Supported PWM frequency */ +static const unsigned int freq_table[] = { 20, 33, 50, 100, 5000, 8333, 12500, + 25000 }; + #define FAN_FROM_REG(val, rpm_range) ((val) == 0 || (val) == 255 ? \ 0 : (rpm_ranges[rpm_range] * 30) / (val)) #define TEMP_LIMIT_TO_REG(val) clamp_val((val) / 1000, 0, 255) @@ -76,20 +83,24 @@ struct max6639_data { u16 temp[2]; /* Temperature, in 1/8 C, 0..255 C */ bool temp_fault[2]; /* Detected temperature diode failure */ u8 fan[2]; /* Register value: TACH count for fans >=30 */ + struct pwm_device *pwmd[2]; /* max6639 has two pwm device */ + u32 target_rpm[2]; + u32 max_rpm[2]; + u8 status; /* Detected channel alarms and fan failures */ /* Register values only written to */ - u8 pwm[2]; /* Register value: Duty cycle 0..120 */ u8 temp_therm[2]; /* THERM Temperature, 0..255 C (->_max) */ u8 temp_alert[2]; /* ALERT Temperature, 0..255 C (->_crit) */ u8 temp_ot[2]; /* OT Temperature, 0..255 C (->_emergency) */ /* Register values initialized only once */ - u8 ppr; /* Pulses per rotation 0..3 for 1..4 ppr */ - u8 rpm_range; /* Index in above rpm_ranges table */ - + u8 ppr[2]; /* Pulses per rotation 0..3 for 1..4 ppr */ + u8 rpm_range[2]; /* Index in above rpm_ranges table */ /* Optional regulator for FAN supply */ struct regulator *reg; + /* max6639 pwm chip */ + struct pwm_chip chip; }; static struct max6639_data *max6639_update_device(struct device *dev) @@ -280,8 +291,12 @@ static ssize_t pwm_show(struct device *dev, struct device_attribute *dev_attr, { struct sensor_device_attribute *attr = to_sensor_dev_attr(dev_attr); struct max6639_data *data = dev_get_drvdata(dev); + struct pwm_state state; + + pwm_get_state(data->pwmd[attr->index], &state); + + return sprintf(buf, "%d\n", pwm_get_relative_duty_cycle(&state, 255)); - return sprintf(buf, "%d\n", data->pwm[attr->index] * 255 / 120); } static ssize_t pwm_store(struct device *dev, @@ -290,9 +305,9 @@ static ssize_t pwm_store(struct device *dev, { struct sensor_device_attribute *attr = to_sensor_dev_attr(dev_attr); struct max6639_data *data = dev_get_drvdata(dev); - struct i2c_client *client = data->client; unsigned long val; int res; + struct pwm_state state; res = kstrtoul(buf, 10, &val); if (res) @@ -300,12 +315,12 @@ static ssize_t pwm_store(struct device *dev, val = clamp_val(val, 0, 255); - mutex_lock(&data->update_lock); - data->pwm[attr->index] = (u8)(val * 120 / 255); - i2c_smbus_write_byte_data(client, - MAX6639_REG_TARGTDUTY(attr->index), - data->pwm[attr->index]); - mutex_unlock(&data->update_lock); + pwm_get_state(data->pwmd[attr->index], &state); + pwm_set_relative_duty_cycle(&state, val, 255); + res = pwm_apply_state(data->pwmd[attr->index], &state); + if (res) + return res; + return count; } @@ -319,7 +334,7 @@ static ssize_t fan_input_show(struct device *dev, return PTR_ERR(data); return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan[attr->index], - data->rpm_range)); + data->rpm_range[attr->index])); } static ssize_t alarm_show(struct device *dev, @@ -386,29 +401,41 @@ static struct attribute *max6639_attrs[] = { ATTRIBUTE_GROUPS(max6639); /* - * returns respective index in rpm_ranges table - * 1 by default on invalid range + * Get respective index in rpm_ranges table */ -static int rpm_range_to_reg(int range) +static int rpm_range_to_index(struct device *dev, u8 *index, int rpm) { - int i; - - for (i = 0; i < ARRAY_SIZE(rpm_ranges); i++) { - if (rpm_ranges[i] == range) - return i; + if (rpm < 0) + return -EINVAL; + + /* Set index based on chip support */ + switch (rpm) { + case 0 ... 2000: + *index = 0; + break; + case 2001 ... 4000: + *index = 1; + break; + case 4001 ... 8000: + *index = 2; + break; + case 8001 ... 16000: + *index = 3; + break; + default: + /* Use max range for higher RPM */ + dev_warn(dev, + "RPM higher than supported range. Default to 16000 RPM"); + *index = 3; } - - return 1; /* default: 4000 RPM */ + return 0; } static int max6639_init_client(struct i2c_client *client, struct max6639_data *data) { - struct max6639_platform_data *max6639_info = - dev_get_platdata(&client->dev); - int i; - int rpm_range = 1; /* default: 4000 RPM */ - int err; + int i, err; + struct pwm_state state; /* Reset chip to default values, see below for GCONFIG setup */ err = i2c_smbus_write_byte_data(client, MAX6639_REG_GCONFIG, @@ -416,51 +443,29 @@ static int max6639_init_client(struct i2c_client *client, if (err) goto exit; - /* Fans pulse per revolution is 2 by default */ - if (max6639_info && max6639_info->ppr > 0 && - max6639_info->ppr < 5) - data->ppr = max6639_info->ppr; - else - data->ppr = 2; - data->ppr -= 1; - - if (max6639_info) - rpm_range = rpm_range_to_reg(max6639_info->rpm_range); - data->rpm_range = rpm_range; - for (i = 0; i < 2; i++) { /* Set Fan pulse per revolution */ - err = i2c_smbus_write_byte_data(client, - MAX6639_REG_FAN_PPR(i), - data->ppr << 6); + err = i2c_smbus_write_byte_data(client, MAX6639_REG_FAN_PPR(i), + data->ppr[i] << 6); if (err) goto exit; /* Fans config PWM, RPM */ err = i2c_smbus_write_byte_data(client, - MAX6639_REG_FAN_CONFIG1(i), - MAX6639_FAN_CONFIG1_PWM | rpm_range); - if (err) - goto exit; - - /* Fans PWM polarity high by default */ - if (max6639_info && max6639_info->pwm_polarity == 0) - err = i2c_smbus_write_byte_data(client, - MAX6639_REG_FAN_CONFIG2a(i), 0x00); - else - err = i2c_smbus_write_byte_data(client, - MAX6639_REG_FAN_CONFIG2a(i), 0x02); + MAX6639_REG_FAN_CONFIG1(i), + MAX6639_FAN_CONFIG1_PWM | + data->rpm_range[i]); if (err) goto exit; /* - * /THERM full speed enable, + * /THERM full speed disable, * PWM frequency 25kHz, see also GCONFIG below */ err = i2c_smbus_write_byte_data(client, - MAX6639_REG_FAN_CONFIG3(i), - MAX6639_FAN_CONFIG3_THERM_FULL_SPEED | 0x03); + MAX6639_REG_FAN_CONFIG3(i), + 0x03); if (err) goto exit; @@ -469,31 +474,35 @@ static int max6639_init_client(struct i2c_client *client, data->temp_alert[i] = 90; data->temp_ot[i] = 100; err = i2c_smbus_write_byte_data(client, - MAX6639_REG_THERM_LIMIT(i), - data->temp_therm[i]); + MAX6639_REG_THERM_LIMIT(i), + data->temp_therm[i]); if (err) goto exit; err = i2c_smbus_write_byte_data(client, - MAX6639_REG_ALERT_LIMIT(i), - data->temp_alert[i]); + MAX6639_REG_ALERT_LIMIT(i), + data->temp_alert[i]); if (err) goto exit; err = i2c_smbus_write_byte_data(client, - MAX6639_REG_OT_LIMIT(i), data->temp_ot[i]); + MAX6639_REG_OT_LIMIT(i), + data->temp_ot[i]); if (err) goto exit; - /* PWM 120/120 (i.e. 100%) */ - data->pwm[i] = 120; - err = i2c_smbus_write_byte_data(client, - MAX6639_REG_TARGTDUTY(i), data->pwm[i]); + /* Configure PWM controller */ + pwm_get_state(data->pwmd[i], &state); + pwm_set_relative_duty_cycle(&state, data->target_rpm[i], + data->max_rpm[i]); + err = pwm_apply_state(data->pwmd[i], &state); if (err) goto exit; + } /* Start monitoring */ err = i2c_smbus_write_byte_data(client, MAX6639_REG_GCONFIG, MAX6639_GCONFIG_DISABLE_TIMEOUT | MAX6639_GCONFIG_CH2_LOCAL | MAX6639_GCONFIG_PWM_FREQ_HI); + exit: return err; } @@ -524,12 +533,276 @@ static void max6639_regulator_disable(void *data) regulator_disable(data); } +static int max6639_probe_child_from_dt(struct i2c_client *client, + struct device_node *child, + struct max6639_data *data) + +{ + struct device *dev = &client->dev; + u32 i, maxrpm; + int val, err; + + err = of_property_read_u32(child, "reg", &i); + if (err) { + dev_err(dev, "missing reg property of %pOFn\n", child); + return err; + } + + if (i >= 2) { + dev_err(dev, "invalid reg %d of %pOFn\n", i, child); + return -EINVAL; + } + + err = of_property_read_u32(child, "pulses-per-revolution", &val); + if (err) { + dev_err(dev, "missing pulses-per-revolution property of %pOFn", + child); + return err; + } + + if (val < 0 || val > 5) { + dev_err(dev, "invalid pulses-per-revolution %d of %pOFn\n", val, + child); + return -EINVAL; + } + data->ppr[i] = val; + + err = of_property_read_u32(child, "max-rpm", &maxrpm); + if (err) { + dev_err(dev, "missing max-rpm property of %pOFn\n", child); + return err; + } + + err = rpm_range_to_index(dev, &data->rpm_range[i], maxrpm); + if (err) { + dev_err(dev, "invalid max-rpm %d of %pOFn\n", maxrpm, child); + return err; + } + data->max_rpm[i] = maxrpm; + + err = of_property_read_u32(child, "target-rpm", &val); + /* Use provided target RPM else default to maxrpm */ + if (!err) + data->target_rpm[i] = val; + else + data->target_rpm[i] = maxrpm; + + /* Get pwms property for PWM control */ + data->pwmd[i] = devm_fwnode_pwm_get(dev, &child->fwnode, NULL); + + if (!IS_ERR(data->pwmd[i])) + return 0; + + if (PTR_ERR(data->pwmd[i]) == -EPROBE_DEFER) + return PTR_ERR(data->pwmd[i]); + + dev_dbg(dev, "Using chip default PWM"); + data->pwmd[i] = pwm_request_from_chip(&data->chip, i, NULL); + if (!IS_ERR(data->pwmd[i])) + return 0; + + dev_dbg(dev, "Failed to configure pwm for fan %d", i); + return PTR_ERR_OR_ZERO(data->pwmd[i]); +} + +static int max6639_probe_from_dt(struct i2c_client *client, + struct max6639_data *data) +{ + struct device *dev = &client->dev; + const struct device_node *np = dev->of_node; + struct device_node *child; + int err; + + /* Compatible with non-DT platforms */ + if (!np) + return 0; + + for_each_child_of_node(np, child) { + if (strcmp(child->name, "fan")) + continue; + + err = max6639_probe_child_from_dt(client, child, data); + if (err) { + of_node_put(child); + return err; + } + } + + return 0; +} + +static struct max6639_data *to_max6639_pwm(struct pwm_chip *chip) +{ + return container_of(chip, struct max6639_data, chip); +} + +static void max6639_pwm_get_state(struct pwm_chip *chip, + struct pwm_device *pwm, + struct pwm_state *state) +{ + + struct max6639_data *data = to_max6639_pwm(chip); + struct i2c_client *client = data->client; + int value, i = pwm->hwpwm, x; + unsigned int freq; + + mutex_lock(&data->update_lock); + + value = i2c_smbus_read_byte_data(client, MAX6639_REG_FAN_CONFIG1(i)); + if (value < 0) + goto abort; + + if (value & MAX6639_FAN_CONFIG1_PWM) { + state->enabled = true; + + /* Determine frequency from respective registers */ + value = i2c_smbus_read_byte_data(client, + MAX6639_REG_FAN_CONFIG3(i)); + if (value < 0) + goto abort; + x = value & MAX6639_FAN_CONFIG3_FREQ_MASK; + + value = i2c_smbus_read_byte_data(client, MAX6639_REG_GCONFIG); + if (value < 0) + goto abort; + if (value & MAX6639_GCONFIG_PWM_FREQ_HI) + x |= 0x4; + x &= 0x7; + freq = freq_table[x]; + + state->period = DIV_ROUND_UP(NSEC_PER_SEC, freq); + + value = i2c_smbus_read_byte_data(client, + MAX6639_REG_TARGTDUTY(i)); + if (value < 0) + goto abort; + /* max6639 supports 120 slots only */ + state->duty_cycle = mul_u64_u32_div(state->period, value, 120); + + value = i2c_smbus_read_byte_data(client, + MAX6639_REG_FAN_CONFIG2a(i)); + if (value < 0) + goto abort; + value &= MAX6639_REG_FAN_CONFIG2a_PWM_POL; + state->polarity = (value != 0); + } else + state->enabled = false; + +abort: + mutex_unlock(&data->update_lock); + +} + +static int max6639_pwm_apply(struct pwm_chip *chip, struct pwm_device *pwm, + const struct pwm_state *state) +{ + struct max6639_data *data = to_max6639_pwm(chip); + struct i2c_client *client = data->client; + int value = 0, i = pwm->hwpwm, x; + unsigned int freq; + struct pwm_state cstate; + + cstate = pwm->state; + + mutex_lock(&data->update_lock); + + if (state->period != cstate.period) { + /* Configure frequency */ + freq = DIV_ROUND_UP_ULL(NSEC_PER_SEC, state->period); + /* Chip supports limited number of frequency */ + for (x = 0; x < sizeof(freq_table); x++) + if (freq <= freq_table[x]) + break; + + value = i2c_smbus_read_byte_data(client, + MAX6639_REG_FAN_CONFIG3(i)); + if (value < 0) + goto abort; + value &= ~MAX6639_FAN_CONFIG3_FREQ_MASK; + value |= (x & MAX6639_FAN_CONFIG3_FREQ_MASK); + value = i2c_smbus_write_byte_data(client, + MAX6639_REG_FAN_CONFIG3(i), + value); + + value = i2c_smbus_read_byte_data(client, MAX6639_REG_GCONFIG); + if (value < 0) + goto abort; + + if (x >> 2) + value &= ~MAX6639_GCONFIG_PWM_FREQ_HI; + else + value |= MAX6639_GCONFIG_PWM_FREQ_HI; + value = i2c_smbus_write_byte_data(client, MAX6639_REG_GCONFIG, + value); + if (value < 0) + goto abort; + } + + /* Configure dutycycle */ + if (state->duty_cycle != cstate.duty_cycle || + state->period != cstate.period) { + value = DIV_ROUND_DOWN_ULL( + state->duty_cycle * MAX6639_REG_TARGTDUTY_SLOT, + state->period); + value = i2c_smbus_write_byte_data(client, + MAX6639_REG_TARGTDUTY(i), + value); + if (value < 0) + goto abort; + } + + /* Configure polarity */ + if (state->polarity != cstate.polarity) { + value = i2c_smbus_read_byte_data(client, + MAX6639_REG_FAN_CONFIG2a(i)); + if (value < 0) + goto abort; + if (state->polarity == PWM_POLARITY_NORMAL) + value |= MAX6639_REG_FAN_CONFIG2a_PWM_POL; + else + value &= ~MAX6639_REG_FAN_CONFIG2a_PWM_POL; + value = i2c_smbus_write_byte_data(client, + MAX6639_REG_FAN_CONFIG2a(i), + value); + if (value < 0) + goto abort; + } + + if (state->enabled == cstate.enabled) + goto abort; + + value = i2c_smbus_read_byte_data(client, MAX6639_REG_FAN_CONFIG1(i)); + if (value < 0) + goto abort; + if (state->enabled) + value |= MAX6639_FAN_CONFIG1_PWM; + else + value &= ~MAX6639_FAN_CONFIG1_PWM; + + value = i2c_smbus_write_byte_data(client, MAX6639_REG_FAN_CONFIG1(i), + value); + if (value < 0) + goto abort; + value = 0; + +abort: + mutex_unlock(&data->update_lock); + + return value; +} + +static const struct pwm_ops max6639_pwm_ops = { + .apply = max6639_pwm_apply, + .get_state = max6639_pwm_get_state, + .owner = THIS_MODULE, +}; + static int max6639_probe(struct i2c_client *client) { struct device *dev = &client->dev; struct max6639_data *data; struct device *hwmon_dev; - int err; + int err, i; data = devm_kzalloc(dev, sizeof(struct max6639_data), GFP_KERNEL); if (!data) @@ -537,11 +810,23 @@ static int max6639_probe(struct i2c_client *client) data->client = client; + /* Add PWM controller of max6639 */ + data->chip.dev = dev; + data->chip.ops = &max6639_pwm_ops; + data->chip.npwm = 2; + + err = devm_pwmchip_add(dev, &data->chip); + if (err < 0) { + return dev_err_probe(dev, err, "failed to add PWM chip\n"); + } + data->reg = devm_regulator_get_optional(dev, "fan"); if (IS_ERR(data->reg)) { - if (PTR_ERR(data->reg) != -ENODEV) - return PTR_ERR(data->reg); - + if (PTR_ERR(data->reg) != -ENODEV) { + err = (int)PTR_ERR(data->reg); + return dev_err_probe(dev, err, + "Failed looking up fan supply\n"); + } data->reg = NULL; } else { /* Spin up fans */ @@ -560,6 +845,22 @@ static int max6639_probe(struct i2c_client *client) mutex_init(&data->update_lock); + /* Below are defaults leter overridden by DT properties */ + for (i = 0; i < 2; i++) { + /* 4000 RPM */ + data->rpm_range[i] = 1; + data->ppr[i] = 2; + /* Max. temp. 80C/90C/100C */ + data->temp_therm[i] = 80; + data->temp_alert[i] = 90; + data->temp_ot[i] = 100; + } + + /* Probe from DT to get configuration */ + err = max6639_probe_from_dt(client, data); + if (err) + return err; + /* Initialize the max6639 chip */ err = max6639_init_client(client, data); if (err < 0) @@ -571,6 +872,7 @@ static int max6639_probe(struct i2c_client *client) return PTR_ERR_OR_ZERO(hwmon_dev); } +#if IS_ENABLED(CONFIG_PM_SLEEP) static int max6639_suspend(struct device *dev) { struct i2c_client *client = to_i2c_client(dev); @@ -608,6 +910,7 @@ static int max6639_resume(struct device *dev) return i2c_smbus_write_byte_data(client, MAX6639_REG_GCONFIG, ret & ~MAX6639_GCONFIG_STANDBY); } +#endif static const struct i2c_device_id max6639_id[] = { {"max6639", 0}, @@ -616,13 +919,22 @@ static const struct i2c_device_id max6639_id[] = { MODULE_DEVICE_TABLE(i2c, max6639_id); -static DEFINE_SIMPLE_DEV_PM_OPS(max6639_pm_ops, max6639_suspend, max6639_resume); +#ifdef CONFIG_OF +static const struct of_device_id maxim_of_platform_match[] = { + {.compatible = "maxim,max6639"}, + {}, +}; +MODULE_DEVICE_TABLE(of, maxim_of_platform_match); +#endif + +static SIMPLE_DEV_PM_OPS(max6639_pm_ops, max6639_suspend, max6639_resume); static struct i2c_driver max6639_driver = { .class = I2C_CLASS_HWMON, .driver = { .name = "max6639", .pm = pm_sleep_ptr(&max6639_pm_ops), + .of_match_table = of_match_ptr(maxim_of_platform_match), }, .probe_new = max6639_probe, .id_table = max6639_id, diff --git a/include/linux/platform_data/max6639.h b/include/linux/platform_data/max6639.h deleted file mode 100644 index 65bfdb4fdc15..000000000000 --- a/include/linux/platform_data/max6639.h +++ /dev/null @@ -1,15 +0,0 @@ -/* SPDX-License-Identifier: GPL-2.0 */ -#ifndef _LINUX_MAX6639_H -#define _LINUX_MAX6639_H - -#include - -/* platform data for the MAX6639 temperature sensor and fan control */ - -struct max6639_platform_data { - bool pwm_polarity; /* Polarity low (0) or high (1, default) */ - int ppr; /* Pulses per rotation 1..4 (default == 2) */ - int rpm_range; /* 2000, 4000 (default), 8000 or 16000 */ -}; - -#endif /* _LINUX_MAX6639_H */