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[2620:137:e000::1:20]) by mx.google.com with ESMTP id l9-20020a170906794900b0078de4629958si8472448ejo.248.2022.10.31.03.37.45; Mon, 31 Oct 2022 03:38:11 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20; Authentication-Results: mx.google.com; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230205AbiJaKg6 (ORCPT + 99 others); Mon, 31 Oct 2022 06:36:58 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:52996 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230495AbiJaKgw (ORCPT ); Mon, 31 Oct 2022 06:36:52 -0400 Received: from twspam01.aspeedtech.com (twspam01.aspeedtech.com [211.20.114.71]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id CD482BC35 for ; Mon, 31 Oct 2022 03:36:49 -0700 (PDT) Received: from mail.aspeedtech.com ([192.168.0.24]) by twspam01.aspeedtech.com with ESMTP id 29VADXr3074631; Mon, 31 Oct 2022 18:13:33 +0800 (GMT-8) (envelope-from billy_tsai@aspeedtech.com) Received: from BillyTsai-pc.aspeed.com (192.168.2.149) by TWMBX02.aspeed.com (192.168.0.24) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Mon, 31 Oct 2022 18:36:39 +0800 From: Billy Tsai To: , , , , , , , , , , , , , , , , , Subject: [PATCH 3/3] hwmon: Add Aspeed ast2600 TACH support Date: Mon, 31 Oct 2022 18:38:08 +0800 Message-ID: <20221031103809.20225-4-billy_tsai@aspeedtech.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20221031103809.20225-1-billy_tsai@aspeedtech.com> References: <20221031103809.20225-1-billy_tsai@aspeedtech.com> MIME-Version: 1.0 X-Originating-IP: [192.168.2.149] X-ClientProxiedBy: TWMBX02.aspeed.com (192.168.0.24) To TWMBX02.aspeed.com (192.168.0.24) X-DNSRBL: X-MAIL: twspam01.aspeedtech.com 29VADXr3074631 X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00,SPF_HELO_NONE, SPF_PASS autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-getmail-retrieved-from-mailbox: =?utf-8?q?INBOX?= X-GMAIL-THRID: =?utf-8?q?1748199215132897883?= X-GMAIL-MSGID: =?utf-8?q?1748199215132897883?= This patch add the support of Tachometer which can use to monitor the frequency of the input. The tach supports up to 16 channels and it's part function of multi-function device "pwm-tach controller". Signed-off-by: Billy Tsai --- drivers/hwmon/Kconfig | 9 + drivers/hwmon/Makefile | 1 + drivers/hwmon/tach-aspeed-ast2600.c | 692 ++++++++++++++++++++++++++++ 3 files changed, 702 insertions(+) create mode 100644 drivers/hwmon/tach-aspeed-ast2600.c diff --git a/drivers/hwmon/Kconfig b/drivers/hwmon/Kconfig index fa2356398744..a84c15b73aa6 100644 --- a/drivers/hwmon/Kconfig +++ b/drivers/hwmon/Kconfig @@ -397,6 +397,15 @@ config SENSORS_ASPEED This driver can also be built as a module. If so, the module will be called aspeed_pwm_tacho. +config SENSORS_TACH_ASPEED_AST2600 + tristate "ASPEED ast2600 Tachometer support" + select REGMAP + help + This driver provides support for Aspeed ast2600 Tachometer. + + To compile this driver as a module, choose M here: the module + will be called tach-aspeed-ast2600. + config SENSORS_ATXP1 tristate "Attansic ATXP1 VID controller" depends on I2C diff --git a/drivers/hwmon/Makefile b/drivers/hwmon/Makefile index d2497b2644e6..7e2d708e93b8 100644 --- a/drivers/hwmon/Makefile +++ b/drivers/hwmon/Makefile @@ -51,6 +51,7 @@ obj-$(CONFIG_SENSORS_ARM_SCMI) += scmi-hwmon.o obj-$(CONFIG_SENSORS_ARM_SCPI) += scpi-hwmon.o obj-$(CONFIG_SENSORS_AS370) += as370-hwmon.o obj-$(CONFIG_SENSORS_ASC7621) += asc7621.o +obj-$(CONFIG_SENSORS_TACH_ASPEED_AST2600) += tach-aspeed-ast2600.o obj-$(CONFIG_SENSORS_ASPEED) += aspeed-pwm-tacho.o obj-$(CONFIG_SENSORS_ATXP1) += atxp1.o obj-$(CONFIG_SENSORS_AXI_FAN_CONTROL) += axi-fan-control.o diff --git a/drivers/hwmon/tach-aspeed-ast2600.c b/drivers/hwmon/tach-aspeed-ast2600.c new file mode 100644 index 000000000000..c5250ea8a16d --- /dev/null +++ b/drivers/hwmon/tach-aspeed-ast2600.c @@ -0,0 +1,692 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * Copyright (C) ASPEED Technology Inc. + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +/* The channel number of Aspeed tach controller */ +#define TACH_ASPEED_NR_TACHS 16 +/* TACH Control Register */ +#define TACH_ASPEED_CTRL(ch) (((ch) * 0x10) + 0x08) +#define TACH_ASPEED_IER BIT(31) +#define TACH_ASPEED_INVERS_LIMIT BIT(30) +#define TACH_ASPEED_LOOPBACK BIT(29) +#define TACH_ASPEED_ENABLE BIT(28) +#define TACH_ASPEED_DEBOUNCE_MASK GENMASK(27, 26) +#define TACH_ASPEED_DEBOUNCE_BIT (26) +#define TACH_ASPEED_IO_EDGE_MASK GENMASK(25, 24) +#define TACH_ASPEED_IO_EDGE_BIT (24) +#define TACH_ASPEED_CLK_DIV_T_MASK GENMASK(23, 20) +#define TACH_ASPEED_CLK_DIV_BIT (20) +#define TACH_ASPEED_THRESHOLD_MASK GENMASK(19, 0) +/* [27:26] */ +#define DEBOUNCE_3_CLK 0x00 +#define DEBOUNCE_2_CLK 0x01 +#define DEBOUNCE_1_CLK 0x02 +#define DEBOUNCE_0_CLK 0x03 +/* [25:24] */ +#define F2F_EDGES 0x00 +#define R2R_EDGES 0x01 +#define BOTH_EDGES 0x02 +/* [23:20] */ +/* divisor = 4 to the nth power, n = register value */ +#define DEFAULT_TACH_DIV 1024 +#define DIV_TO_REG(divisor) (ilog2(divisor) >> 1) + +/* TACH Status Register */ +#define TACH_ASPEED_STS(ch) (((ch) * 0x10) + 0x0C) + +/*PWM_TACH_STS */ +#define TACH_ASPEED_ISR BIT(31) +#define TACH_ASPEED_PWM_OUT BIT(25) +#define TACH_ASPEED_PWM_OEN BIT(24) +#define TACH_ASPEED_DEB_INPUT BIT(23) +#define TACH_ASPEED_RAW_INPUT BIT(22) +#define TACH_ASPEED_VALUE_UPDATE BIT(21) +#define TACH_ASPEED_FULL_MEASUREMENT BIT(20) +#define TACH_ASPEED_VALUE_MASK GENMASK(19, 0) +/********************************************************** + * Software setting + *********************************************************/ +#define DEFAULT_FAN_MIN_RPM 1000 +#define DEFAULT_FAN_PULSE_PR 2 +/* + * Add this value to avoid CPU consuming a lot of resources in waiting rpm + * updating. Assume the max rpm of fan is 60000, the fastest period of updating + * tach value will be equal to (1000000 * 2 * 60) / (2 * max_rpm) = 1000us. + */ +#define DEFAULT_FAN_MAX_RPM 60000 + +struct aspeed_tach_channel_params { + int limited_inverse; + u16 threshold; + u8 tach_edge; + u8 tach_debounce; + u8 pulse_pr; + u32 min_rpm; + u32 max_rpm; + u32 divisor; + u32 sample_period; /* unit is us */ + u32 polling_period; /* unit is us */ +}; + +struct aspeed_tach_data { + struct device *dev; + struct regmap *regmap; + struct clk *clk; + struct reset_control *reset; + bool tach_present[TACH_ASPEED_NR_TACHS]; + struct aspeed_tach_channel_params *tach_channel; + /* for hwmon */ + const struct attribute_group *groups[2]; +}; + +static void aspeed_update_tach_sample_period(struct aspeed_tach_data *priv, + u8 fan_tach_ch) +{ + u32 tach_period_us; + u8 pulse_pr = priv->tach_channel[fan_tach_ch].pulse_pr; + u32 min_rpm = priv->tach_channel[fan_tach_ch].min_rpm; + + /* + * min(Tach input clock) = (PulsePR * minRPM) / 60 + * max(Tach input period) = 60 / (PulsePR * minRPM) + * Tach sample period > 2 * max(Tach input period) = (2*60) / (PulsePR * minRPM) + */ + tach_period_us = (USEC_PER_SEC * 2 * 60) / (pulse_pr * min_rpm); + /* Add the margin (about 1.5) of tach sample period to avoid sample miss */ + tach_period_us = (tach_period_us * 1500) >> 10; + dev_dbg(priv->dev, "tach%d sample period = %dus", fan_tach_ch, tach_period_us); + priv->tach_channel[fan_tach_ch].sample_period = tach_period_us; +} + +static void aspeed_update_tach_polling_period(struct aspeed_tach_data *priv, + u8 fan_tach_ch) +{ + u32 tach_period_us; + u8 pulse_pr = priv->tach_channel[fan_tach_ch].pulse_pr; + u32 max_rpm = priv->tach_channel[fan_tach_ch].max_rpm; + + tach_period_us = (USEC_PER_SEC * 2 * 60) / (pulse_pr * max_rpm); + dev_dbg(priv->dev, "tach%d polling period = %dus", fan_tach_ch, tach_period_us); + priv->tach_channel[fan_tach_ch].polling_period = tach_period_us; +} + +static void aspeed_tach_ch_enable(struct aspeed_tach_data *priv, u8 tach_ch, + bool enable) +{ + if (enable) + regmap_set_bits(priv->regmap, TACH_ASPEED_CTRL(tach_ch), + TACH_ASPEED_ENABLE); + else + regmap_clear_bits(priv->regmap, TACH_ASPEED_CTRL(tach_ch), + TACH_ASPEED_ENABLE); +} + +static int aspeed_get_fan_tach_ch_rpm(struct aspeed_tach_data *priv, + u8 fan_tach_ch) +{ + u32 raw_data, tach_div, val; + unsigned long clk_source; + u64 rpm; + int ret; + + /* Restart the Tach channel to guarantee the value is fresh */ + aspeed_tach_ch_enable(priv, fan_tach_ch, false); + aspeed_tach_ch_enable(priv, fan_tach_ch, true); + ret = regmap_read_poll_timeout( + priv->regmap, TACH_ASPEED_STS(fan_tach_ch), val, + (val & TACH_ASPEED_FULL_MEASUREMENT) && + (val & TACH_ASPEED_VALUE_UPDATE), + priv->tach_channel[fan_tach_ch].polling_period, + priv->tach_channel[fan_tach_ch].sample_period); + + if (ret) { + /* return 0 if we didn't get an answer because of timeout*/ + if (ret == -ETIMEDOUT) + return 0; + else + return ret; + } + + raw_data = val & TACH_ASPEED_VALUE_MASK; + /* + * We need the mode to determine if the raw_data is double (from + * counting both edges). + */ + if (priv->tach_channel[fan_tach_ch].tach_edge == BOTH_EDGES) + raw_data <<= 1; + + tach_div = raw_data * (priv->tach_channel[fan_tach_ch].divisor) * + (priv->tach_channel[fan_tach_ch].pulse_pr); + + clk_source = clk_get_rate(priv->clk); + dev_dbg(priv->dev, "clk %ld, raw_data %d , tach_div %d\n", clk_source, + raw_data, tach_div); + + if (tach_div == 0) + return -EDOM; + + rpm = (u64)clk_source * 60; + do_div(rpm, tach_div); + + return rpm; +} + +static ssize_t fan_show(struct device *dev, struct device_attribute *attr, + char *buf) +{ + struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); + int index = sensor_attr->index; + int rpm; + struct aspeed_tach_data *priv = dev_get_drvdata(dev); + + rpm = aspeed_get_fan_tach_ch_rpm(priv, index); + if (rpm < 0) + return rpm; + + return sprintf(buf, "%d\n", rpm); +} + +static umode_t fan_dev_is_visible(struct kobject *kobj, struct attribute *a, + int index) +{ + struct device *dev = container_of(kobj, struct device, kobj); + struct aspeed_tach_data *priv = dev_get_drvdata(dev); + + if (!priv->tach_present[index % TACH_ASPEED_NR_TACHS]) + return 0; + return a->mode; +} + +static SENSOR_DEVICE_ATTR_RO(fan1_input, fan, 0); +static SENSOR_DEVICE_ATTR_RO(fan2_input, fan, 1); +static SENSOR_DEVICE_ATTR_RO(fan3_input, fan, 2); +static SENSOR_DEVICE_ATTR_RO(fan4_input, fan, 3); +static SENSOR_DEVICE_ATTR_RO(fan5_input, fan, 4); +static SENSOR_DEVICE_ATTR_RO(fan6_input, fan, 5); +static SENSOR_DEVICE_ATTR_RO(fan7_input, fan, 6); +static SENSOR_DEVICE_ATTR_RO(fan8_input, fan, 7); +static SENSOR_DEVICE_ATTR_RO(fan9_input, fan, 8); +static SENSOR_DEVICE_ATTR_RO(fan10_input, fan, 9); +static SENSOR_DEVICE_ATTR_RO(fan11_input, fan, 10); +static SENSOR_DEVICE_ATTR_RO(fan12_input, fan, 11); +static SENSOR_DEVICE_ATTR_RO(fan13_input, fan, 12); +static SENSOR_DEVICE_ATTR_RO(fan14_input, fan, 13); +static SENSOR_DEVICE_ATTR_RO(fan15_input, fan, 14); +static SENSOR_DEVICE_ATTR_RO(fan16_input, fan, 15); + +static ssize_t fan_max_show(struct device *dev, struct device_attribute *attr, + char *buf) +{ + struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); + int index = sensor_attr->index; + struct aspeed_tach_data *priv = dev_get_drvdata(dev); + u32 max_rpm = priv->tach_channel[index].max_rpm; + + return sprintf(buf, "%d\n", max_rpm); +} + +static ssize_t fan_max_store(struct device *dev, struct device_attribute *attr, + const char *buf, size_t count) +{ + struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); + int index = sensor_attr->index; + struct aspeed_tach_data *priv = dev_get_drvdata(dev); + long max_rpm; + int ret; + + ret = kstrtoul(buf, 10, &max_rpm); + if (ret < 0) + return ret; + + priv->tach_channel[index].max_rpm = max_rpm; + aspeed_update_tach_polling_period(priv, index); + return count; +} + +static SENSOR_DEVICE_ATTR_RW(fan1_max, fan_max, 0); +static SENSOR_DEVICE_ATTR_RW(fan2_max, fan_max, 1); +static SENSOR_DEVICE_ATTR_RW(fan3_max, fan_max, 2); +static SENSOR_DEVICE_ATTR_RW(fan4_max, fan_max, 3); +static SENSOR_DEVICE_ATTR_RW(fan5_max, fan_max, 4); +static SENSOR_DEVICE_ATTR_RW(fan6_max, fan_max, 5); +static SENSOR_DEVICE_ATTR_RW(fan7_max, fan_max, 6); +static SENSOR_DEVICE_ATTR_RW(fan8_max, fan_max, 7); +static SENSOR_DEVICE_ATTR_RW(fan9_max, fan_max, 8); +static SENSOR_DEVICE_ATTR_RW(fan10_max, fan_max, 9); +static SENSOR_DEVICE_ATTR_RW(fan11_max, fan_max, 10); +static SENSOR_DEVICE_ATTR_RW(fan12_max, fan_max, 11); +static SENSOR_DEVICE_ATTR_RW(fan13_max, fan_max, 12); +static SENSOR_DEVICE_ATTR_RW(fan14_max, fan_max, 13); +static SENSOR_DEVICE_ATTR_RW(fan15_max, fan_max, 14); +static SENSOR_DEVICE_ATTR_RW(fan16_max, fan_max, 15); + +static ssize_t fan_min_show(struct device *dev, struct device_attribute *attr, + char *buf) +{ + struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); + int index = sensor_attr->index; + struct aspeed_tach_data *priv = dev_get_drvdata(dev); + u32 min_rpm = priv->tach_channel[index].min_rpm; + + return sprintf(buf, "%d\n", min_rpm); +} + +static ssize_t fan_min_store(struct device *dev, struct device_attribute *attr, + const char *buf, size_t count) +{ + struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); + int index = sensor_attr->index; + struct aspeed_tach_data *priv = dev_get_drvdata(dev); + long min_rpm; + int ret; + + ret = kstrtoul(buf, 10, &min_rpm); + if (ret < 0) + return ret; + + priv->tach_channel[index].min_rpm = min_rpm; + aspeed_update_tach_sample_period(priv, index); + return count; +} + +static SENSOR_DEVICE_ATTR_RW(fan1_min, fan_min, 0); +static SENSOR_DEVICE_ATTR_RW(fan2_min, fan_min, 1); +static SENSOR_DEVICE_ATTR_RW(fan3_min, fan_min, 2); +static SENSOR_DEVICE_ATTR_RW(fan4_min, fan_min, 3); +static SENSOR_DEVICE_ATTR_RW(fan5_min, fan_min, 4); +static SENSOR_DEVICE_ATTR_RW(fan6_min, fan_min, 5); +static SENSOR_DEVICE_ATTR_RW(fan7_min, fan_min, 6); +static SENSOR_DEVICE_ATTR_RW(fan8_min, fan_min, 7); +static SENSOR_DEVICE_ATTR_RW(fan9_min, fan_min, 8); +static SENSOR_DEVICE_ATTR_RW(fan10_min, fan_min, 9); +static SENSOR_DEVICE_ATTR_RW(fan11_min, fan_min, 10); +static SENSOR_DEVICE_ATTR_RW(fan12_min, fan_min, 11); +static SENSOR_DEVICE_ATTR_RW(fan13_min, fan_min, 12); +static SENSOR_DEVICE_ATTR_RW(fan14_min, fan_min, 13); +static SENSOR_DEVICE_ATTR_RW(fan15_min, fan_min, 14); +static SENSOR_DEVICE_ATTR_RW(fan16_min, fan_min, 15); + +static ssize_t fan_pulse_show(struct device *dev, struct device_attribute *attr, + char *buf) +{ + struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); + int index = sensor_attr->index; + struct aspeed_tach_data *priv = dev_get_drvdata(dev); + u32 pulse_pr = priv->tach_channel[index].pulse_pr; + + return sprintf(buf, "%d\n", pulse_pr); +} + +static ssize_t fan_pulse_store(struct device *dev, struct device_attribute *attr, + const char *buf, size_t count) +{ + struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); + int index = sensor_attr->index; + struct aspeed_tach_data *priv = dev_get_drvdata(dev); + long pulse_pr; + int ret; + + ret = kstrtoul(buf, 10, &pulse_pr); + if (ret < 0) + return ret; + + priv->tach_channel[index].pulse_pr = pulse_pr; + aspeed_update_tach_sample_period(priv, index); + return count; +} + +static SENSOR_DEVICE_ATTR_RW(fan1_pulse, fan_pulse, 0); +static SENSOR_DEVICE_ATTR_RW(fan2_pulse, fan_pulse, 1); +static SENSOR_DEVICE_ATTR_RW(fan3_pulse, fan_pulse, 2); +static SENSOR_DEVICE_ATTR_RW(fan4_pulse, fan_pulse, 3); +static SENSOR_DEVICE_ATTR_RW(fan5_pulse, fan_pulse, 4); +static SENSOR_DEVICE_ATTR_RW(fan6_pulse, fan_pulse, 5); +static SENSOR_DEVICE_ATTR_RW(fan7_pulse, fan_pulse, 6); +static SENSOR_DEVICE_ATTR_RW(fan8_pulse, fan_pulse, 7); +static SENSOR_DEVICE_ATTR_RW(fan9_pulse, fan_pulse, 8); +static SENSOR_DEVICE_ATTR_RW(fan10_pulse, fan_pulse, 9); +static SENSOR_DEVICE_ATTR_RW(fan11_pulse, fan_pulse, 10); +static SENSOR_DEVICE_ATTR_RW(fan12_pulse, fan_pulse, 11); +static SENSOR_DEVICE_ATTR_RW(fan13_pulse, fan_pulse, 12); +static SENSOR_DEVICE_ATTR_RW(fan14_pulse, fan_pulse, 13); +static SENSOR_DEVICE_ATTR_RW(fan15_pulse, fan_pulse, 14); +static SENSOR_DEVICE_ATTR_RW(fan16_pulse, fan_pulse, 15); + +static ssize_t fan_div_show(struct device *dev, struct device_attribute *attr, + char *buf) +{ + struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); + int index = sensor_attr->index; + struct aspeed_tach_data *priv = dev_get_drvdata(dev); + u32 divisor, val = priv->tach_channel[index].divisor; + + regmap_read(priv->regmap, TACH_ASPEED_CTRL(index), &val); + divisor = FIELD_GET(TACH_ASPEED_CLK_DIV_T_MASK, val); + divisor = 1 << (divisor << 1); + + return sprintf(buf, "%d\n", divisor); +} + +static ssize_t fan_div_store(struct device *dev, struct device_attribute *attr, + const char *buf, size_t count) +{ + struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); + int index = sensor_attr->index; + struct aspeed_tach_data *priv = dev_get_drvdata(dev); + long divisor; + int ret; + + ret = kstrtoul(buf, 10, &divisor); + if (ret < 0) + return ret; + + if ((is_power_of_2(divisor) && !(ilog2(divisor) % 2))) { + priv->tach_channel[index].divisor = divisor; + regmap_write_bits(priv->regmap, TACH_ASPEED_CTRL(index), + TACH_ASPEED_CLK_DIV_T_MASK, + DIV_TO_REG(priv->tach_channel[index].divisor) + << TACH_ASPEED_CLK_DIV_BIT); + } else { + dev_err(dev, + "fan_div value %ld not supported. Only support power of 4\n", + divisor); + return -EINVAL; + } + + return count; +} + +static SENSOR_DEVICE_ATTR_RW(fan1_div, fan_div, 0); +static SENSOR_DEVICE_ATTR_RW(fan2_div, fan_div, 1); +static SENSOR_DEVICE_ATTR_RW(fan3_div, fan_div, 2); +static SENSOR_DEVICE_ATTR_RW(fan4_div, fan_div, 3); +static SENSOR_DEVICE_ATTR_RW(fan5_div, fan_div, 4); +static SENSOR_DEVICE_ATTR_RW(fan6_div, fan_div, 5); +static SENSOR_DEVICE_ATTR_RW(fan7_div, fan_div, 6); +static SENSOR_DEVICE_ATTR_RW(fan8_div, fan_div, 7); +static SENSOR_DEVICE_ATTR_RW(fan9_div, fan_div, 8); +static SENSOR_DEVICE_ATTR_RW(fan10_div, fan_div, 9); +static SENSOR_DEVICE_ATTR_RW(fan11_div, fan_div, 10); +static SENSOR_DEVICE_ATTR_RW(fan12_div, fan_div, 11); +static SENSOR_DEVICE_ATTR_RW(fan13_div, fan_div, 12); +static SENSOR_DEVICE_ATTR_RW(fan14_div, fan_div, 13); +static SENSOR_DEVICE_ATTR_RW(fan15_div, fan_div, 14); +static SENSOR_DEVICE_ATTR_RW(fan16_div, fan_div, 15); + +static struct attribute *fan_dev_attrs[] = { + &sensor_dev_attr_fan1_input.dev_attr.attr, + &sensor_dev_attr_fan2_input.dev_attr.attr, + &sensor_dev_attr_fan3_input.dev_attr.attr, + &sensor_dev_attr_fan4_input.dev_attr.attr, + &sensor_dev_attr_fan5_input.dev_attr.attr, + &sensor_dev_attr_fan6_input.dev_attr.attr, + &sensor_dev_attr_fan7_input.dev_attr.attr, + &sensor_dev_attr_fan8_input.dev_attr.attr, + &sensor_dev_attr_fan9_input.dev_attr.attr, + &sensor_dev_attr_fan10_input.dev_attr.attr, + &sensor_dev_attr_fan11_input.dev_attr.attr, + &sensor_dev_attr_fan12_input.dev_attr.attr, + &sensor_dev_attr_fan13_input.dev_attr.attr, + &sensor_dev_attr_fan14_input.dev_attr.attr, + &sensor_dev_attr_fan15_input.dev_attr.attr, + &sensor_dev_attr_fan16_input.dev_attr.attr, + + &sensor_dev_attr_fan1_max.dev_attr.attr, + &sensor_dev_attr_fan2_max.dev_attr.attr, + &sensor_dev_attr_fan3_max.dev_attr.attr, + &sensor_dev_attr_fan4_max.dev_attr.attr, + &sensor_dev_attr_fan5_max.dev_attr.attr, + &sensor_dev_attr_fan6_max.dev_attr.attr, + &sensor_dev_attr_fan7_max.dev_attr.attr, + &sensor_dev_attr_fan8_max.dev_attr.attr, + &sensor_dev_attr_fan9_max.dev_attr.attr, + &sensor_dev_attr_fan10_max.dev_attr.attr, + &sensor_dev_attr_fan11_max.dev_attr.attr, + &sensor_dev_attr_fan12_max.dev_attr.attr, + &sensor_dev_attr_fan13_max.dev_attr.attr, + &sensor_dev_attr_fan14_max.dev_attr.attr, + &sensor_dev_attr_fan15_max.dev_attr.attr, + &sensor_dev_attr_fan16_max.dev_attr.attr, + + &sensor_dev_attr_fan1_min.dev_attr.attr, + &sensor_dev_attr_fan2_min.dev_attr.attr, + &sensor_dev_attr_fan3_min.dev_attr.attr, + &sensor_dev_attr_fan4_min.dev_attr.attr, + &sensor_dev_attr_fan5_min.dev_attr.attr, + &sensor_dev_attr_fan6_min.dev_attr.attr, + &sensor_dev_attr_fan7_min.dev_attr.attr, + &sensor_dev_attr_fan8_min.dev_attr.attr, + &sensor_dev_attr_fan9_min.dev_attr.attr, + &sensor_dev_attr_fan10_min.dev_attr.attr, + &sensor_dev_attr_fan11_min.dev_attr.attr, + &sensor_dev_attr_fan12_min.dev_attr.attr, + &sensor_dev_attr_fan13_min.dev_attr.attr, + &sensor_dev_attr_fan14_min.dev_attr.attr, + &sensor_dev_attr_fan15_min.dev_attr.attr, + &sensor_dev_attr_fan16_min.dev_attr.attr, + + &sensor_dev_attr_fan1_div.dev_attr.attr, + &sensor_dev_attr_fan2_div.dev_attr.attr, + &sensor_dev_attr_fan3_div.dev_attr.attr, + &sensor_dev_attr_fan4_div.dev_attr.attr, + &sensor_dev_attr_fan5_div.dev_attr.attr, + &sensor_dev_attr_fan6_div.dev_attr.attr, + &sensor_dev_attr_fan7_div.dev_attr.attr, + &sensor_dev_attr_fan8_div.dev_attr.attr, + &sensor_dev_attr_fan9_div.dev_attr.attr, + &sensor_dev_attr_fan10_div.dev_attr.attr, + &sensor_dev_attr_fan11_div.dev_attr.attr, + &sensor_dev_attr_fan12_div.dev_attr.attr, + &sensor_dev_attr_fan13_div.dev_attr.attr, + &sensor_dev_attr_fan14_div.dev_attr.attr, + &sensor_dev_attr_fan15_div.dev_attr.attr, + &sensor_dev_attr_fan16_div.dev_attr.attr, + + &sensor_dev_attr_fan1_pulse.dev_attr.attr, + &sensor_dev_attr_fan2_pulse.dev_attr.attr, + &sensor_dev_attr_fan3_pulse.dev_attr.attr, + &sensor_dev_attr_fan4_pulse.dev_attr.attr, + &sensor_dev_attr_fan5_pulse.dev_attr.attr, + &sensor_dev_attr_fan6_pulse.dev_attr.attr, + &sensor_dev_attr_fan7_pulse.dev_attr.attr, + &sensor_dev_attr_fan8_pulse.dev_attr.attr, + &sensor_dev_attr_fan9_pulse.dev_attr.attr, + &sensor_dev_attr_fan10_pulse.dev_attr.attr, + &sensor_dev_attr_fan11_pulse.dev_attr.attr, + &sensor_dev_attr_fan12_pulse.dev_attr.attr, + &sensor_dev_attr_fan13_pulse.dev_attr.attr, + &sensor_dev_attr_fan14_pulse.dev_attr.attr, + &sensor_dev_attr_fan15_pulse.dev_attr.attr, + &sensor_dev_attr_fan16_pulse.dev_attr.attr, + NULL +}; + +static const struct attribute_group fan_dev_group = { + .attrs = fan_dev_attrs, + .is_visible = fan_dev_is_visible, +}; + +static void aspeed_create_fan_tach_channel(struct aspeed_tach_data *priv, + u32 tach_ch) +{ + priv->tach_present[tach_ch] = true; + priv->tach_channel[tach_ch].limited_inverse = 0; + regmap_write_bits(priv->regmap, TACH_ASPEED_CTRL(tach_ch), + TACH_ASPEED_INVERS_LIMIT, + priv->tach_channel[tach_ch].limited_inverse ? + TACH_ASPEED_INVERS_LIMIT : + 0); + + priv->tach_channel[tach_ch].tach_debounce = DEBOUNCE_3_CLK; + regmap_write_bits(priv->regmap, TACH_ASPEED_CTRL(tach_ch), + TACH_ASPEED_DEBOUNCE_MASK, + priv->tach_channel[tach_ch].tach_debounce + << TACH_ASPEED_DEBOUNCE_BIT); + + priv->tach_channel[tach_ch].tach_edge = F2F_EDGES; + regmap_write_bits(priv->regmap, TACH_ASPEED_CTRL(tach_ch), + TACH_ASPEED_IO_EDGE_MASK, + priv->tach_channel[tach_ch].tach_edge + << TACH_ASPEED_IO_EDGE_BIT); + + priv->tach_channel[tach_ch].divisor = DEFAULT_TACH_DIV; + regmap_write_bits(priv->regmap, TACH_ASPEED_CTRL(tach_ch), + TACH_ASPEED_CLK_DIV_T_MASK, + DIV_TO_REG(priv->tach_channel[tach_ch].divisor) + << TACH_ASPEED_CLK_DIV_BIT); + + priv->tach_channel[tach_ch].threshold = 0; + regmap_write_bits(priv->regmap, TACH_ASPEED_CTRL(tach_ch), + TACH_ASPEED_THRESHOLD_MASK, + priv->tach_channel[tach_ch].threshold); + + priv->tach_channel[tach_ch].pulse_pr = DEFAULT_FAN_PULSE_PR; + priv->tach_channel[tach_ch].min_rpm = DEFAULT_FAN_MIN_RPM; + aspeed_update_tach_sample_period(priv, tach_ch); + + priv->tach_channel[tach_ch].max_rpm = DEFAULT_FAN_MAX_RPM; + aspeed_update_tach_polling_period(priv, tach_ch); + + aspeed_tach_ch_enable(priv, tach_ch, true); +} + +static int aspeed_tach_create_fan(struct device *dev, struct device_node *child, + struct aspeed_tach_data *priv) +{ + u32 tach_channel; + int ret; + + ret = of_property_read_u32(child, "reg", &tach_channel); + if (ret) + return ret; + + aspeed_create_fan_tach_channel(priv, tach_channel); + + return 0; +} + +static int aspeed_tach_probe(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + struct device_node *np, *child; + struct aspeed_tach_data *priv; + struct device *hwmon; + struct platform_device *parent_dev; + int ret; + + np = dev->parent->of_node; + if (!of_device_is_compatible(np, "aspeed,ast2600-pwm-tach")) + return dev_err_probe(dev, -ENODEV, + "Unsupported tach device binding\n"); + + priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL); + if (!priv) + return -ENOMEM; + priv->dev = &pdev->dev; + priv->tach_channel = + devm_kzalloc(dev, + TACH_ASPEED_NR_TACHS * sizeof(*priv->tach_channel), + GFP_KERNEL); + + priv->regmap = syscon_node_to_regmap(np); + if (IS_ERR(priv->regmap)) { + dev_err(priv->dev, "Couldn't get regmap\n"); + return -ENODEV; + } + parent_dev = of_find_device_by_node(np); + priv->clk = devm_clk_get(&parent_dev->dev, 0); + if (IS_ERR(priv->clk)) + return dev_err_probe(dev, PTR_ERR(priv->clk), + "Couldn't get clock\n"); + + priv->reset = devm_reset_control_get_shared(&parent_dev->dev, NULL); + if (IS_ERR(priv->reset)) + return dev_err_probe(dev, PTR_ERR(priv->reset), + "Couldn't get reset control\n"); + + ret = clk_prepare_enable(priv->clk); + if (ret) + return dev_err_probe(dev, ret, "Couldn't enable clock\n"); + + ret = reset_control_deassert(priv->reset); + if (ret) { + dev_err_probe(dev, ret, "Couldn't deassert reset control\n"); + goto err_disable_clk; + } + for_each_child_of_node(dev->of_node, child) { + ret = aspeed_tach_create_fan(dev, child, priv); + if (ret) { + of_node_put(child); + goto err_assert_reset; + } + } + + priv->groups[0] = &fan_dev_group; + priv->groups[1] = NULL; + hwmon = devm_hwmon_device_register_with_groups(dev, "aspeed_tach", priv, + priv->groups); + ret = PTR_ERR_OR_ZERO(hwmon); + if (ret) { + dev_err_probe(dev, ret, "Failed to register hwmon device\n"); + goto err_assert_reset; + } + platform_set_drvdata(pdev, priv); + return 0; +err_assert_reset: + reset_control_assert(priv->reset); +err_disable_clk: + clk_disable_unprepare(priv->clk); + return ret; +} + +static int aspeed_tach_remove(struct platform_device *pdev) +{ + struct aspeed_tach_data *priv = platform_get_drvdata(pdev); + + reset_control_assert(priv->reset); + clk_disable_unprepare(priv->clk); + + return 0; +} + +static const struct of_device_id of_stach_match_table[] = { + { + .compatible = "aspeed,ast2600-tach", + }, + {}, +}; +MODULE_DEVICE_TABLE(of, of_stach_match_table); + +static struct platform_driver aspeed_tach_driver = { + .probe = aspeed_tach_probe, + .remove = aspeed_tach_remove, + .driver = { + .name = "aspeed_tach", + .of_match_table = of_stach_match_table, + }, +}; + +module_platform_driver(aspeed_tach_driver); + +MODULE_AUTHOR("Billy Tsai "); +MODULE_DESCRIPTION("Aspeed ast2600 TACH device driver"); +MODULE_LICENSE("GPL v2"); +