From patchwork Fri Oct 9 15:44:56 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dmitry Baryshkov X-Patchwork-Id: 11826369 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 4AFAA139F for ; Fri, 9 Oct 2020 15:45:32 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 16F0E222EA for ; Fri, 9 Oct 2020 15:45:32 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=linaro.org header.i=@linaro.org header.b="gmSv64Oh" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2389461AbgJIPpa (ORCPT ); Fri, 9 Oct 2020 11:45:30 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:36996 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2389417AbgJIPpa (ORCPT ); Fri, 9 Oct 2020 11:45:30 -0400 Received: from mail-lf1-x141.google.com (mail-lf1-x141.google.com [IPv6:2a00:1450:4864:20::141]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 985CEC0613D7 for ; Fri, 9 Oct 2020 08:45:28 -0700 (PDT) Received: by mail-lf1-x141.google.com with SMTP id h6so11179435lfj.3 for ; Fri, 09 Oct 2020 08:45:28 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=Wfcq4WlxdUw+aTIQdd++nA2qY5PRN6cullgg/x9OXoE=; b=gmSv64OhMxwPTpvgr23ggvLXHV/aS9+HY/QsAL77dHFv/6UwXSyrrRP7sjPF+U4QOU dGlrKTpqHMH5QhCEpRCVwQHa64BwtPZhI3mzrucNlryIqWosvW0HTw0ihfFYJQ8jyknG HqTA8powBMsYUZ94ixaoN90nkv1wh0rpzXSiQy6DJLmyclOW/GCL7LGr5QN6RFWhdG8G 5kas+zfvc5RavWCx7tN0w7y39YgSkfibuL60/HXEVZZuLFsjnBZn+nQ/PwfsFSug3c/D +sVCw2HkpMVfReOvvO54twOEGo6JfnuIIc5aKY4GBE8vEn9nwvU6Whws/bA01199U1Ro mkYg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=Wfcq4WlxdUw+aTIQdd++nA2qY5PRN6cullgg/x9OXoE=; b=ji/GJvpVvQSa6zmLEiRBafXnPlfQrUQWTKsyW3kbaiY6bD5sDhfbCS+ml0uoODX6UF BcVgQwlNS1vjgbJD381fUoKZFO47w49b5dRs1ulfoqB1+aAYvkq7Lke8jetqM/RRWsi3 1MDOKaj3AcPkHEOnun51jyB25hxCrXJCnzcNcDPDfXayjuJ/lNU87A2B0apDZ2Ne9nuA GdIkNTCMLOD6ZVBbJbE2P1ntCW0uLyYDD3gS8VQjKIC5pHL0CFr/9Vu8JWrGgG/WHfZk MtEzb/Q1DkDpGpJnpmoC3rkb1iO4Yp0TXj6vb587OWWqaHvKLldrfh/AEEiFlxJfBYrA v11Q== X-Gm-Message-State: AOAM530NUMe0zg9Uy5/ObGuG+qFwbWNGMX9jI5D4XCMGwf1LJsgvCVv/ 3bK/3I4AXo/fUHvXlYKIoiCcXw== X-Google-Smtp-Source: ABdhPJxy+i63LFufwl1H7n0/0UU/TKcAIhZuYzMUvkhjNJqukpqklYOL7mOLdVEncNeYMnMu72HzKA== X-Received: by 2002:a19:8ad4:: with SMTP id m203mr4987329lfd.183.1602258326765; Fri, 09 Oct 2020 08:45:26 -0700 (PDT) Received: from eriador.lan ([188.162.65.231]) by smtp.gmail.com with ESMTPSA id r4sm1505597lfc.162.2020.10.09.08.45.24 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 09 Oct 2020 08:45:26 -0700 (PDT) From: Dmitry Baryshkov To: Andy Gross , Bjorn Andersson , Rob Herring , Zhang Rui , Daniel Lezcano , Amit Kucheria , Jonathan Cameron , Hartmut Knaack , Lars-Peter Clausen , Peter Meerwald-Stadler Cc: linux-arm-msm@vger.kernel.org, linux-pm@vger.kernel.org, devicetree@vger.kernel.org, linux-iio@vger.kernel.org, Manivannan Sadhasivam , Jishnu Prakash Subject: [PATCH v8 08/11] thermal: qcom: add support for adc-tm5 PMIC thermal monitor Date: Fri, 9 Oct 2020 18:44:56 +0300 Message-Id: <20201009154459.106189-9-dmitry.baryshkov@linaro.org> X-Mailer: git-send-email 2.28.0 In-Reply-To: <20201009154459.106189-1-dmitry.baryshkov@linaro.org> References: <20201009154459.106189-1-dmitry.baryshkov@linaro.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-iio@vger.kernel.org Add support for Thermal Monitoring part of PMIC5. This part is closely coupled with ADC, using it's channels directly. ADC-TM support generating interrupts on ADC value crossing low or high voltage bounds, which is used to support thermal trip points. Signed-off-by: Dmitry Baryshkov --- drivers/iio/adc/qcom-vadc-common.c | 62 +++ drivers/thermal/qcom/Kconfig | 11 + drivers/thermal/qcom/Makefile | 1 + drivers/thermal/qcom/qcom-spmi-adc-tm5.c | 619 +++++++++++++++++++++++ include/linux/iio/adc/qcom-vadc-common.h | 3 + 5 files changed, 696 insertions(+) create mode 100644 drivers/thermal/qcom/qcom-spmi-adc-tm5.c diff --git a/drivers/iio/adc/qcom-vadc-common.c b/drivers/iio/adc/qcom-vadc-common.c index ee94774b72e6..8ceefb079712 100644 --- a/drivers/iio/adc/qcom-vadc-common.c +++ b/drivers/iio/adc/qcom-vadc-common.c @@ -376,6 +376,42 @@ static int qcom_vadc_map_voltage_temp(const struct vadc_map_pt *pts, return 0; } +static s32 qcom_vadc_map_temp_voltage(const struct vadc_map_pt *pts, + u32 tablesize, int input) +{ + bool descending = 1; + u32 i = 0; + + /* Check if table is descending or ascending */ + if (tablesize > 1) { + if (pts[0].y < pts[1].y) + descending = 0; + } + + while (i < tablesize) { + if (descending && pts[i].y < input) { + /* table entry is less than measured*/ + /* value and table is descending, stop */ + break; + } else if ((!descending) && pts[i].y > input) { + /* table entry is greater than measured*/ + /*value and table is ascending, stop */ + break; + } + i++; + } + + if (i == 0) + return pts[0].x; + if (i == tablesize) + return pts[tablesize - 1].x; + + /* result is between search_index and search_index-1 */ + /* interpolate linearly */ + return fixp_linear_interpolate(pts[i - 1].y, pts[i - 1].x, + pts[i].y, pts[i].x, input); +} + static void qcom_vadc_scale_calib(const struct vadc_linear_graph *calib_graph, u16 adc_code, bool absolute, @@ -473,6 +509,19 @@ static int qcom_vadc_scale_chg_temp(const struct vadc_linear_graph *calib_graph, return 0; } +static u16 qcom_vadc_scale_voltage_code(int voltage, + const struct vadc_prescale_ratio *prescale, + const u32 full_scale_code_volt, + unsigned int factor) +{ + s64 volt = voltage, adc_vdd_ref_mv = 1875; + + volt *= prescale->num * factor * full_scale_code_volt; + volt = div64_s64(volt, (s64)prescale->den * adc_vdd_ref_mv * 1000); + + return volt; +} + static int qcom_vadc_scale_code_voltage_factor(u16 adc_code, const struct vadc_prescale_ratio *prescale, const struct adc5_data *data, @@ -657,6 +706,19 @@ int qcom_vadc_scale(enum vadc_scale_fn_type scaletype, } EXPORT_SYMBOL(qcom_vadc_scale); +u16 qcom_adc_tm5_temp_volt_scale(unsigned int prescale_ratio, + u32 full_scale_code_volt, int temp) +{ + const struct vadc_prescale_ratio *prescale = &adc5_prescale_ratios[prescale_ratio]; + s32 voltage; + + voltage = qcom_vadc_map_temp_voltage(adcmap_100k_104ef_104fb_1875_vref, + ARRAY_SIZE(adcmap_100k_104ef_104fb_1875_vref), + temp); + return qcom_vadc_scale_voltage_code(voltage, prescale, full_scale_code_volt, 1000); +} +EXPORT_SYMBOL(qcom_adc_tm5_temp_volt_scale); + int qcom_adc5_hw_scale(enum vadc_scale_fn_type scaletype, unsigned int prescale_ratio, const struct adc5_data *data, diff --git a/drivers/thermal/qcom/Kconfig b/drivers/thermal/qcom/Kconfig index aa9c1d80fae4..8d5ac2df26dc 100644 --- a/drivers/thermal/qcom/Kconfig +++ b/drivers/thermal/qcom/Kconfig @@ -10,6 +10,17 @@ config QCOM_TSENS Also able to set threshold temperature for both hot and cold and update when a threshold is reached. +config QCOM_SPMI_ADC_TM5 + tristate "Qualcomm SPMI PMIC Thermal Monitor ADC5" + depends on OF && SPMI && IIO + select REGMAP_SPMI + select QCOM_VADC_COMMON + help + This enables the thermal driver for the ADC thermal monitoring + device. It shows up as a thermal zone with multiple trip points. + Thermal client sets threshold temperature for both warm and cool and + gets updated when a threshold is reached. + config QCOM_SPMI_TEMP_ALARM tristate "Qualcomm SPMI PMIC Temperature Alarm" depends on OF && SPMI && IIO diff --git a/drivers/thermal/qcom/Makefile b/drivers/thermal/qcom/Makefile index ec86eef7f6a6..252ea7d9da0b 100644 --- a/drivers/thermal/qcom/Makefile +++ b/drivers/thermal/qcom/Makefile @@ -3,4 +3,5 @@ obj-$(CONFIG_QCOM_TSENS) += qcom_tsens.o qcom_tsens-y += tsens.o tsens-v2.o tsens-v1.o tsens-v0_1.o \ tsens-8960.o +obj-$(CONFIG_QCOM_SPMI_ADC_TM5) += qcom-spmi-adc-tm5.o obj-$(CONFIG_QCOM_SPMI_TEMP_ALARM) += qcom-spmi-temp-alarm.o diff --git a/drivers/thermal/qcom/qcom-spmi-adc-tm5.c b/drivers/thermal/qcom/qcom-spmi-adc-tm5.c new file mode 100644 index 000000000000..9e4d5ae5fe33 --- /dev/null +++ b/drivers/thermal/qcom/qcom-spmi-adc-tm5.c @@ -0,0 +1,619 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Copyright (c) 2012-2020, The Linux Foundation. All rights reserved. + * Copyright (c) 2020 Linaro Limited + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#define ADC5_MAX_CHANNEL 0xc0 +#define ADC_TM5_NUM_CHANNELS 8 + +#define ADC_TM5_STATUS_LOW 0x0a + +#define ADC_TM5_STATUS_HIGH 0x0b + +#define ADC_TM5_NUM_BTM 0x0f + +#define ADC_TM5_ADC_DIG_PARAM 0x42 + +#define ADC_TM5_FAST_AVG_CTL (ADC_TM5_ADC_DIG_PARAM + 1) +#define ADC_TM5_FAST_AVG_EN BIT(7) + +#define ADC_TM5_MEAS_INTERVAL_CTL (ADC_TM5_ADC_DIG_PARAM + 2) +#define ADC_TM5_TIMER1 3 /* 3.9ms */ + +#define ADC_TM5_MEAS_INTERVAL_CTL2 (ADC_TM5_ADC_DIG_PARAM + 3) +#define ADC_TM5_MEAS_INTERVAL_CTL2_MASK 0xf0 +#define ADC_TM5_TIMER2 10 /* 1 second */ +#define ADC_TM5_MEAS_INTERVAL_CTL3_MASK 0xf +#define ADC_TM5_TIMER3 4 /* 4 second */ + +#define ADC_TM_EN_CTL1 0x46 +#define ADC_TM_EN BIT(7) +#define ADC_TM_CONV_REQ 0x47 +#define ADC_TM_CONV_REQ_EN BIT(7) + +#define ADC_TM5_M_CHAN_BASE 0x60 + +#define ADC_TM5_M_ADC_CH_SEL_CTL(n) (ADC_TM5_M_CHAN_BASE + ((n) * 8) + 0) +#define ADC_TM5_M_LOW_THR0(n) (ADC_TM5_M_CHAN_BASE + ((n) * 8) + 1) +#define ADC_TM5_M_LOW_THR1(n) (ADC_TM5_M_CHAN_BASE + ((n) * 8) + 2) +#define ADC_TM5_M_HIGH_THR0(n) (ADC_TM5_M_CHAN_BASE + ((n) * 8) + 3) +#define ADC_TM5_M_HIGH_THR1(n) (ADC_TM5_M_CHAN_BASE + ((n) * 8) + 4) +#define ADC_TM5_M_MEAS_INTERVAL_CTL(n) (ADC_TM5_M_CHAN_BASE + ((n) * 8) + 5) +#define ADC_TM5_M_CTL(n) (ADC_TM5_M_CHAN_BASE + ((n) * 8) + 6) +#define ADC_TM5_M_CTL_HW_SETTLE_DELAY_MASK 0xf +#define ADC_TM5_M_CTL_CAL_SEL_MASK 0x30 +#define ADC_TM5_M_CTL_CAL_VAL 0x40 +#define ADC_TM5_M_EN(n) (ADC_TM5_M_CHAN_BASE + ((n) * 8) + 7) +#define ADC_TM5_M_MEAS_EN BIT(7) +#define ADC_TM5_M_HIGH_THR_INT_EN BIT(1) +#define ADC_TM5_M_LOW_THR_INT_EN BIT(0) + +enum adc5_timer_select { + ADC5_TIMER_SEL_1 = 0, + ADC5_TIMER_SEL_2, + ADC5_TIMER_SEL_3, + ADC5_TIMER_SEL_NONE, +}; + +struct adc_tm5_data { + const u32 full_scale_code_volt; + unsigned int *decimation; + unsigned int *hw_settle; +}; + +enum adc_tm5_cal_method { + ADC_TM5_NO_CAL = 0, + ADC_TM5_RATIOMETRIC_CAL, + ADC_TM5_ABSOLUTE_CAL +}; + +struct adc_tm5_chip; + +/** + * struct adc_tm5_channel - ADC Thermal Monitoring channel data. + * @channel: channel number. + * @adc_channel: corresponding ADC channel number. + * @cal_method: calibration method. + * @prescale: channel scaling performed on the input signal. + * @hw_settle_time: the time between AMUX being configured and the + * start of conversion. + * @iio: IIO channel instance used by this channel. + * @chip: ADC TM chip instance. + * @tzd: thermal zone device used by this channel. + */ +struct adc_tm5_channel { + unsigned int channel; + unsigned int adc_channel; + enum adc_tm5_cal_method cal_method; + unsigned int prescale; + unsigned int hw_settle_time; + struct iio_channel *iio; + struct adc_tm5_chip *chip; + struct thermal_zone_device *tzd; +}; + +/** + * struct adc_tm5_chip - ADC Thermal Monitoring properties + * @regmap: SPMI ADC5 Thermal Monitoring peripheral register map field. + * @dev: SPMI ADC5 device. + * @data: software configuration data. + * @channels: array of ADC TM channel data. + * @nchannels: amount of channels defined/allocated + * @decimation: sampling rate supported for the channel. + * @avg_samples: ability to provide single result from the ADC + * that is an average of multiple measurements. + * @base: base address of TM registers. + */ +struct adc_tm5_chip { + struct regmap *regmap; + struct device *dev; + const struct adc_tm5_data *data; + struct adc_tm5_channel *channels; + unsigned int nchannels; + unsigned int decimation; + unsigned int avg_samples; + u16 base; +}; + +static const struct adc_tm5_data adc_tm5_data_pmic = { + .full_scale_code_volt = 0x70e4, + .decimation = (unsigned int []) { 250, 420, 840 }, + .hw_settle = (unsigned int []) { 15, 100, 200, 300, 400, 500, 600, 700, + 1000, 2000, 4000, 8000, 16000, 32000, + 64000, 128000 }, +}; + +static int adc_tm5_read(struct adc_tm5_chip *adc_tm, u16 offset, u8 *data, int len) +{ + return regmap_bulk_read(adc_tm->regmap, adc_tm->base + offset, data, len); +} + +static int adc_tm5_write(struct adc_tm5_chip *adc_tm, u16 offset, u8 *data, int len) +{ + return regmap_bulk_write(adc_tm->regmap, adc_tm->base + offset, data, len); +} + +static int adc_tm5_reg_update(struct adc_tm5_chip *adc_tm, u16 offset, u8 mask, u8 val) +{ + return regmap_write_bits(adc_tm->regmap, adc_tm->base + offset, mask, val); +} + +static irqreturn_t adc_tm5_isr(int irq, void *data) +{ + struct adc_tm5_chip *chip = data; + u8 status_low, status_high, ctl; + int ret = 0, i = 0; + + ret = adc_tm5_read(chip, ADC_TM5_STATUS_LOW, &status_low, sizeof(status_low)); + if (unlikely(ret)) { + dev_err(chip->dev, "read status low failed with %d\n", ret); + return IRQ_HANDLED; + } + + ret = adc_tm5_read(chip, ADC_TM5_STATUS_HIGH, &status_high, sizeof(status_high)); + if (unlikely(ret)) { + dev_err(chip->dev, "read status high failed with %d\n", ret); + return IRQ_HANDLED; + } + + for (i = 0; i < chip->nchannels; i++) { + bool upper_set = false, lower_set = false; + unsigned int ch = chip->channels[i].channel; + + if (!chip->channels[i].tzd) { + dev_err_once(chip->dev, "thermal device not found\n"); + continue; + } + + ret = adc_tm5_read(chip, ADC_TM5_M_EN(ch), &ctl, sizeof(ctl)); + if (unlikely(ret)) { + dev_err(chip->dev, "ctl read failed with %d\n", ret); + continue; + } + + if (!(ctl & ADC_TM5_M_MEAS_EN)) + continue; + + lower_set = (status_low & BIT(ch)) && + (ctl & ADC_TM5_M_LOW_THR_INT_EN); + + upper_set = (status_high & BIT(ch)) && + (ctl & ADC_TM5_M_HIGH_THR_INT_EN); + + if (upper_set || lower_set) + thermal_zone_device_update(chip->channels[i].tzd, + THERMAL_EVENT_UNSPECIFIED); + } + + return IRQ_HANDLED; +} + +static int adc_tm5_get_temp(void *data, int *temp) +{ + struct adc_tm5_channel *channel = data; + int ret; + + if (!channel || !channel->iio) + return -EINVAL; + + ret = iio_read_channel_processed(channel->iio, temp); + if (ret < 0) + return ret; + + return 0; +} + +static int adc_tm5_disable_channel(struct adc_tm5_channel *channel) +{ + struct adc_tm5_chip *chip = channel->chip; + unsigned int reg = ADC_TM5_M_EN(channel->channel); + + return adc_tm5_reg_update(chip, reg, + ADC_TM5_M_MEAS_EN | + ADC_TM5_M_HIGH_THR_INT_EN | + ADC_TM5_M_LOW_THR_INT_EN, + 0); +} + +static int adc_tm5_enable(struct adc_tm5_chip *chip) +{ + int ret = 0; + u8 data = 0; + + data = ADC_TM_EN; + ret = adc_tm5_write(chip, ADC_TM_EN_CTL1, &data, sizeof(data)); + if (ret < 0) { + pr_err("adc-tm enable failed\n"); + return ret; + } + + data = ADC_TM_CONV_REQ_EN; + ret = adc_tm5_write(chip, ADC_TM_CONV_REQ, &data, sizeof(data)); + if (ret < 0) { + pr_err("adc-tm request conversion failed\n"); + return ret; + } + + return ret; +} + +static int adc_tm5_configure(struct adc_tm5_channel *channel, int low_temp, int high_temp) +{ + struct adc_tm5_chip *chip = channel->chip; + u8 buf[8]; + u16 reg = ADC_TM5_M_ADC_CH_SEL_CTL(channel->channel); + int ret = 0; + + ret = adc_tm5_read(chip, reg, buf, sizeof(buf)); + if (ret) { + dev_err(chip->dev, "block read failed with %d\n", ret); + return ret; + } + + /* Update ADC channel select */ + buf[0] = channel->adc_channel; + + /* Warm temperature corresponds to low voltage threshold */ + if (high_temp != INT_MAX) { + u16 adc_code = qcom_adc_tm5_temp_volt_scale(channel->prescale, + chip->data->full_scale_code_volt, high_temp); + + buf[1] = adc_code & 0xff; + buf[2] = adc_code >> 8; + buf[7] |= ADC_TM5_M_LOW_THR_INT_EN; + } else { + buf[7] &= ~ADC_TM5_M_LOW_THR_INT_EN; + } + + /* Cool temperature corresponds to high voltage threshold */ + if (low_temp != -INT_MAX) { + u16 adc_code = qcom_adc_tm5_temp_volt_scale(channel->prescale, + chip->data->full_scale_code_volt, low_temp); + + buf[3] = adc_code & 0xff; + buf[4] = adc_code >> 8; + buf[7] |= ADC_TM5_M_HIGH_THR_INT_EN; + } else { + buf[7] &= ~ADC_TM5_M_HIGH_THR_INT_EN; + } + + /* Update timer select */ + buf[5] = ADC5_TIMER_SEL_2; + + /* Set calibration select, hw_settle delay */ + buf[6] &= ~ADC_TM5_M_CTL_HW_SETTLE_DELAY_MASK; + buf[6] |= FIELD_PREP(ADC_TM5_M_CTL_HW_SETTLE_DELAY_MASK, channel->hw_settle_time); + buf[6] &= ~ADC_TM5_M_CTL_CAL_SEL_MASK; + buf[6] |= FIELD_PREP(ADC_TM5_M_CTL_CAL_SEL_MASK, channel->cal_method); + + buf[7] |= ADC_TM5_M_MEAS_EN; + + ret = adc_tm5_write(chip, reg, buf, sizeof(buf)); + if (ret) { + dev_err(chip->dev, "buf write failed\n"); + return ret; + } + + return adc_tm5_enable(chip); +} + +static int adc_tm5_set_trips(void *data, int low_temp, int high_temp) +{ + struct adc_tm5_channel *channel = data; + struct adc_tm5_chip *chip; + int ret; + + if (!channel) + return -EINVAL; + + chip = channel->chip; + dev_dbg(chip->dev, "%d:low_temp(mdegC):%d, high_temp(mdegC):%d\n", + channel->channel, low_temp, high_temp); + + if (high_temp == INT_MAX && low_temp <= -INT_MAX) + ret = adc_tm5_disable_channel(channel); + else + ret = adc_tm5_configure(channel, low_temp, high_temp); + + return ret; +} + +static struct thermal_zone_of_device_ops adc_tm5_ops = { + .get_temp = adc_tm5_get_temp, + .set_trips = adc_tm5_set_trips, +}; + +static int adc_tm5_register_tzd(struct adc_tm5_chip *adc_tm) +{ + unsigned int i; + struct thermal_zone_device *tzd; + + for (i = 0; i < adc_tm->nchannels; i++) { + adc_tm->channels[i].chip = adc_tm; + + tzd = devm_thermal_zone_of_sensor_register(adc_tm->dev, + adc_tm->channels[i].channel, + &adc_tm->channels[i], + &adc_tm5_ops); + if (IS_ERR(tzd)) { + dev_err(adc_tm->dev, "Error registering TZ zone:%ld for channel:%d\n", + PTR_ERR(tzd), adc_tm->channels[i].channel); + continue; + } + adc_tm->channels[i].tzd = tzd; + } + + return 0; +} + +static int adc_tm5_init(struct adc_tm5_chip *chip) +{ + u8 buf[4], channels_available; + int ret; + unsigned int i; + + ret = adc_tm5_read(chip, ADC_TM5_NUM_BTM, + &channels_available, sizeof(channels_available)); + if (ret) { + dev_err(chip->dev, "read failed for BTM channels\n"); + return ret; + } + + /* Select decimation */ + buf[0] = chip->decimation; + + /* Select number of samples in fast average mode */ + buf[1] = chip->avg_samples | ADC_TM5_FAST_AVG_EN; + + /* Select timer1 */ + buf[2] = ADC_TM5_TIMER1; + + /* Select timer2 and timer3 */ + buf[3] = FIELD_PREP(ADC_TM5_MEAS_INTERVAL_CTL2_MASK, ADC_TM5_TIMER2) | + FIELD_PREP(ADC_TM5_MEAS_INTERVAL_CTL3_MASK, ADC_TM5_TIMER3); + + ret = adc_tm5_write(chip, ADC_TM5_ADC_DIG_PARAM, buf, sizeof(buf)); + if (ret) + dev_err(chip->dev, "block write failed with %d\n", ret); + + for (i = 0; i < chip->nchannels; i++) { + if (chip->channels[i].channel >= channels_available) { + dev_err(chip->dev, "Invalid channel %d\n", chip->channels[i].channel); + return -EINVAL; + } + } + + return ret; +} + +static int adc_tm5_get_dt_channel_data(struct adc_tm5_chip *adc_tm, + struct adc_tm5_channel *channel, + struct device_node *node) +{ + const char *name = node->name; + u32 chan, value, varr[2]; + int ret; + struct device *dev = adc_tm->dev; + struct of_phandle_args args; + + ret = of_property_read_u32(node, "reg", &chan); + if (ret) { + dev_err(dev, "%s: invalid channel number (%d)\n", name, ret); + return ret; + } + + if (chan >= ADC_TM5_NUM_CHANNELS) { + dev_err(dev, "%s: invalid channel number %d\n", name, chan); + return -EINVAL; + } + + /* the channel has DT description */ + channel->channel = chan; + + /* + * We are tied to PMIC's ADC controller, which always use single + * argument for channel number. So don't bother parsing + * #io-channel-cells, just enforce cell_count = 1. + */ + ret = of_parse_phandle_with_fixed_args(node, "io-channels", 1, 0, &args); + if (ret < 0) { + dev_err(dev, "%s: invalid ADC channel number %d: %d\n", name, chan, ret); + return ret; + } + of_node_put(args.np); + + if (args.args_count != 1 || args.args[0] >= ADC5_MAX_CHANNEL) { + dev_err(dev, "%s: invalid ADC channel number %d\n", name, chan); + return ret; + } + channel->adc_channel = args.args[0]; + + channel->iio = devm_of_iio_channel_get_by_name(adc_tm->dev, node, NULL); + if (IS_ERR(channel->iio)) { + ret = PTR_ERR(channel->iio); + channel->iio = NULL; + if (ret != -EPROBE_DEFER) + dev_err(dev, "%s: error getting channel: %d\n", name, ret); + return ret; + } + + ret = of_property_read_u32_array(node, "qcom,pre-scaling", varr, 2); + if (!ret) { + ret = qcom_adc5_prescaling_from_dt(varr[0], varr[1]); + if (ret < 0) { + dev_err(dev, "%s: invalid pre-scaling <%d %d>\n", + name, varr[0], varr[1]); + return ret; + } + channel->prescale = ret; + } else { + /* 1:1 prescale is index 0 */ + channel->prescale = 0; + } + + ret = of_property_read_u32(node, "qcom,hw-settle-time-us", &value); + if (!ret) { + ret = qcom_adc5_hw_settle_time_from_dt(value, adc_tm->data->hw_settle); + if (ret < 0) { + dev_err(dev, "%s invalid hw-settle-time-us %d us\n", + name, value); + return ret; + } + channel->hw_settle_time = ret; + } else { + channel->hw_settle_time = VADC_DEF_HW_SETTLE_TIME; + } + + if (of_property_read_bool(node, "qcom,ratiometric")) + channel->cal_method = ADC_TM5_RATIOMETRIC_CAL; + else + channel->cal_method = ADC_TM5_ABSOLUTE_CAL; + + return 0; +} + +static int adc_tm5_get_dt_data(struct adc_tm5_chip *adc_tm, struct device_node *node) +{ + struct adc_tm5_channel *channels; + struct device_node *child; + u32 value; + int ret; + struct device *dev = adc_tm->dev; + + adc_tm->nchannels = of_get_available_child_count(node); + if (!adc_tm->nchannels) + return -EINVAL; + + adc_tm->channels = devm_kcalloc(dev, adc_tm->nchannels, + sizeof(*adc_tm->channels), GFP_KERNEL); + if (!adc_tm->channels) + return -ENOMEM; + + channels = adc_tm->channels; + + adc_tm->data = of_device_get_match_data(dev); + if (!adc_tm->data) + adc_tm->data = &adc_tm5_data_pmic; + + ret = of_property_read_u32(node, "qcom,decimation", &value); + if (!ret) { + ret = qcom_adc5_decimation_from_dt(value, adc_tm->data->decimation); + if (ret < 0) { + dev_err(dev, "invalid decimation %d\n", value); + return ret; + } + adc_tm->decimation = ret; + } else { + adc_tm->decimation = ADC5_DECIMATION_DEFAULT; + } + + ret = of_property_read_u32(node, "qcom,avg-samples", &value); + if (!ret) { + ret = qcom_adc5_avg_samples_from_dt(value); + if (ret < 0) { + dev_err(dev, "invalid avg-samples %d\n", value); + return ret; + } + adc_tm->avg_samples = ret; + } else { + adc_tm->avg_samples = VADC_DEF_AVG_SAMPLES; + } + + for_each_available_child_of_node(node, child) { + ret = adc_tm5_get_dt_channel_data(adc_tm, channels, child); + if (ret) { + of_node_put(child); + return ret; + } + + channels++; + } + + return 0; +} + +static int adc_tm5_probe(struct platform_device *pdev) +{ + struct device_node *node = pdev->dev.of_node; + struct device *dev = &pdev->dev; + struct adc_tm5_chip *adc_tm; + struct regmap *regmap; + int ret, irq; + u32 reg; + + regmap = dev_get_regmap(dev->parent, NULL); + if (!regmap) + return -ENODEV; + + ret = of_property_read_u32(node, "reg", ®); + if (ret) + return ret; + + adc_tm = devm_kzalloc(&pdev->dev, sizeof(*adc_tm), GFP_KERNEL); + if (!adc_tm) + return -ENOMEM; + + adc_tm->regmap = regmap; + adc_tm->dev = dev; + adc_tm->base = reg; + + irq = platform_get_irq(pdev, 0); + if (irq < 0) { + dev_err(dev, "get_irq failed: %d\n", irq); + return irq; + } + + ret = adc_tm5_get_dt_data(adc_tm, node); + if (ret) { + dev_err(dev, "get dt data failed: %d\n", ret); + return ret; + } + + ret = adc_tm5_init(adc_tm); + if (ret) { + dev_err(dev, "adc-tm init failed\n"); + return ret; + } + + ret = adc_tm5_register_tzd(adc_tm); + if (ret) { + dev_err(dev, "tzd register failed\n"); + return ret; + } + + return devm_request_threaded_irq(dev, irq, NULL, adc_tm5_isr, + IRQF_ONESHOT, "pm-adc-tm5", adc_tm); +} + +static const struct of_device_id adc_tm5_match_table[] = { + { + .compatible = "qcom,spmi-adc-tm5", + .data = &adc_tm5_data_pmic, + }, + { } +}; +MODULE_DEVICE_TABLE(of, adc_tm5_match_table); + +static struct platform_driver adc_tm5_driver = { + .driver = { + .name = "qcom-spmi-adc-tm5", + .of_match_table = adc_tm5_match_table, + }, + .probe = adc_tm5_probe, +}; +module_platform_driver(adc_tm5_driver); + +MODULE_DESCRIPTION("SPMI PMIC Thermal Monitor ADC driver"); +MODULE_LICENSE("GPL v2"); diff --git a/include/linux/iio/adc/qcom-vadc-common.h b/include/linux/iio/adc/qcom-vadc-common.h index 03a9119edc71..041d1397995e 100644 --- a/include/linux/iio/adc/qcom-vadc-common.h +++ b/include/linux/iio/adc/qcom-vadc-common.h @@ -174,6 +174,9 @@ int qcom_adc5_hw_scale(enum vadc_scale_fn_type scaletype, const struct adc5_data *data, u16 adc_code, int *result_mdec); +u16 qcom_adc_tm5_temp_volt_scale(unsigned int prescale_ratio, + u32 full_scale_code_volt, int temp); + int qcom_adc5_prescaling_from_dt(u32 num, u32 den); int qcom_adc5_hw_settle_time_from_dt(u32 value, const unsigned int *hw_settle);