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5136f99b9a
It is generally inefficient to iterate over trip indices and call thermal_zone_get_trip() every time to get the struct thermal_trip corresponding to the given trip index, so modify the Tegra thermal drivers to use thermal_zone_for_each_trip() for walking trips. Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> Reviewed-by: Lukasz Luba <lukasz.luba@arm.com> Link: https://patch.msgid.link/1819430.VLH7GnMWUR@rjwysocki.net [ rjw: Dropped an unused local variable ] Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
679 lines
18 KiB
C
679 lines
18 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* Tegra30 SoC Thermal Sensor driver
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*
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* Based on downstream HWMON driver from NVIDIA.
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* Copyright (C) 2011 NVIDIA Corporation
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*
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* Author: Dmitry Osipenko <digetx@gmail.com>
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* Copyright (C) 2021 GRATE-DRIVER project
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*/
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#include <linux/bitfield.h>
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#include <linux/clk.h>
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#include <linux/delay.h>
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#include <linux/errno.h>
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#include <linux/interrupt.h>
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#include <linux/io.h>
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#include <linux/iopoll.h>
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#include <linux/math.h>
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#include <linux/module.h>
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#include <linux/of.h>
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#include <linux/platform_device.h>
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#include <linux/pm.h>
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#include <linux/reset.h>
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#include <linux/slab.h>
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#include <linux/thermal.h>
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#include <linux/types.h>
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#include <soc/tegra/fuse.h>
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#include "../thermal_hwmon.h"
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#define TSENSOR_SENSOR0_CONFIG0 0x0
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#define TSENSOR_SENSOR0_CONFIG0_SENSOR_STOP BIT(0)
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#define TSENSOR_SENSOR0_CONFIG0_HW_FREQ_DIV_EN BIT(1)
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#define TSENSOR_SENSOR0_CONFIG0_THERMAL_RST_EN BIT(2)
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#define TSENSOR_SENSOR0_CONFIG0_DVFS_EN BIT(3)
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#define TSENSOR_SENSOR0_CONFIG0_INTR_OVERFLOW_EN BIT(4)
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#define TSENSOR_SENSOR0_CONFIG0_INTR_HW_FREQ_DIV_EN BIT(5)
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#define TSENSOR_SENSOR0_CONFIG0_INTR_THERMAL_RST_EN BIT(6)
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#define TSENSOR_SENSOR0_CONFIG0_M GENMASK(23, 8)
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#define TSENSOR_SENSOR0_CONFIG0_N GENMASK(31, 24)
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#define TSENSOR_SENSOR0_CONFIG1 0x8
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#define TSENSOR_SENSOR0_CONFIG1_TH1 GENMASK(15, 0)
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#define TSENSOR_SENSOR0_CONFIG1_TH2 GENMASK(31, 16)
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#define TSENSOR_SENSOR0_CONFIG2 0xc
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#define TSENSOR_SENSOR0_CONFIG2_TH3 GENMASK(15, 0)
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#define TSENSOR_SENSOR0_STATUS0 0x18
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#define TSENSOR_SENSOR0_STATUS0_STATE GENMASK(2, 0)
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#define TSENSOR_SENSOR0_STATUS0_INTR BIT(8)
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#define TSENSOR_SENSOR0_STATUS0_CURRENT_VALID BIT(9)
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#define TSENSOR_SENSOR0_TS_STATUS1 0x1c
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#define TSENSOR_SENSOR0_TS_STATUS1_CURRENT_COUNT GENMASK(31, 16)
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#define TEGRA30_FUSE_TEST_PROG_VER 0x28
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#define TEGRA30_FUSE_TSENSOR_CALIB 0x98
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#define TEGRA30_FUSE_TSENSOR_CALIB_LOW GENMASK(15, 0)
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#define TEGRA30_FUSE_TSENSOR_CALIB_HIGH GENMASK(31, 16)
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#define TEGRA30_FUSE_SPARE_BIT 0x144
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struct tegra_tsensor;
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struct tegra_tsensor_calibration_data {
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int a, b, m, n, p, r;
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};
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struct tegra_tsensor_channel {
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void __iomem *regs;
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unsigned int id;
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struct tegra_tsensor *ts;
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struct thermal_zone_device *tzd;
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};
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struct tegra_tsensor {
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void __iomem *regs;
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bool swap_channels;
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struct clk *clk;
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struct device *dev;
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struct reset_control *rst;
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struct tegra_tsensor_channel ch[2];
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struct tegra_tsensor_calibration_data calib;
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};
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static int tegra_tsensor_hw_enable(const struct tegra_tsensor *ts)
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{
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u32 val;
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int err;
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err = reset_control_assert(ts->rst);
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if (err) {
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dev_err(ts->dev, "failed to assert hardware reset: %d\n", err);
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return err;
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}
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err = clk_prepare_enable(ts->clk);
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if (err) {
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dev_err(ts->dev, "failed to enable clock: %d\n", err);
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return err;
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}
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fsleep(1000);
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err = reset_control_deassert(ts->rst);
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if (err) {
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dev_err(ts->dev, "failed to deassert hardware reset: %d\n", err);
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goto disable_clk;
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}
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/*
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* Sensors are enabled after reset by default, but not gauging
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* until clock counter is programmed.
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*
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* M: number of reference clock pulses after which every
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* temperature / voltage measurement is made
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*
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* N: number of reference clock counts for which the counter runs
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*/
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val = FIELD_PREP(TSENSOR_SENSOR0_CONFIG0_M, 12500);
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val |= FIELD_PREP(TSENSOR_SENSOR0_CONFIG0_N, 255);
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/* apply the same configuration to both channels */
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writel_relaxed(val, ts->regs + 0x40 + TSENSOR_SENSOR0_CONFIG0);
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writel_relaxed(val, ts->regs + 0x80 + TSENSOR_SENSOR0_CONFIG0);
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return 0;
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disable_clk:
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clk_disable_unprepare(ts->clk);
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return err;
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}
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static int tegra_tsensor_hw_disable(const struct tegra_tsensor *ts)
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{
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int err;
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err = reset_control_assert(ts->rst);
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if (err) {
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dev_err(ts->dev, "failed to assert hardware reset: %d\n", err);
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return err;
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}
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clk_disable_unprepare(ts->clk);
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return 0;
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}
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static void devm_tegra_tsensor_hw_disable(void *data)
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{
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const struct tegra_tsensor *ts = data;
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tegra_tsensor_hw_disable(ts);
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}
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static int tegra_tsensor_get_temp(struct thermal_zone_device *tz, int *temp)
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{
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const struct tegra_tsensor_channel *tsc = thermal_zone_device_priv(tz);
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const struct tegra_tsensor *ts = tsc->ts;
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int err, c1, c2, c3, c4, counter;
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u32 val;
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/*
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* Counter will be invalid if hardware is misprogrammed or not enough
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* time passed since the time when sensor was enabled.
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*/
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err = readl_relaxed_poll_timeout(tsc->regs + TSENSOR_SENSOR0_STATUS0, val,
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val & TSENSOR_SENSOR0_STATUS0_CURRENT_VALID,
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21 * USEC_PER_MSEC,
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21 * USEC_PER_MSEC * 50);
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if (err) {
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dev_err_once(ts->dev, "ch%u: counter invalid\n", tsc->id);
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return err;
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}
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val = readl_relaxed(tsc->regs + TSENSOR_SENSOR0_TS_STATUS1);
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counter = FIELD_GET(TSENSOR_SENSOR0_TS_STATUS1_CURRENT_COUNT, val);
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/*
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* This shouldn't happen with a valid counter status, nevertheless
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* lets verify the value since it's in a separate (from status)
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* register.
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*/
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if (counter == 0xffff) {
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dev_err_once(ts->dev, "ch%u: counter overflow\n", tsc->id);
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return -EINVAL;
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}
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/*
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* temperature = a * counter + b
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* temperature = m * (temperature ^ 2) + n * temperature + p
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*/
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c1 = DIV_ROUND_CLOSEST(ts->calib.a * counter + ts->calib.b, 1000000);
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c1 = c1 ?: 1;
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c2 = DIV_ROUND_CLOSEST(ts->calib.p, c1);
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c3 = c1 * ts->calib.m;
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c4 = ts->calib.n;
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*temp = DIV_ROUND_CLOSEST(c1 * (c2 + c3 + c4), 1000);
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return 0;
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}
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static int tegra_tsensor_temp_to_counter(const struct tegra_tsensor *ts, int temp)
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{
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int c1, c2;
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c1 = DIV_ROUND_CLOSEST(ts->calib.p - temp * 1000, ts->calib.m);
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c2 = -ts->calib.r - int_sqrt(ts->calib.r * ts->calib.r - c1);
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return DIV_ROUND_CLOSEST(c2 * 1000000 - ts->calib.b, ts->calib.a);
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}
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static int tegra_tsensor_set_trips(struct thermal_zone_device *tz, int low, int high)
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{
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const struct tegra_tsensor_channel *tsc = thermal_zone_device_priv(tz);
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const struct tegra_tsensor *ts = tsc->ts;
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u32 val;
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/*
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* TSENSOR doesn't trigger interrupt on the "low" temperature breach,
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* hence bail out if high temperature is unspecified.
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*/
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if (high == INT_MAX)
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return 0;
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val = readl_relaxed(tsc->regs + TSENSOR_SENSOR0_CONFIG1);
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val &= ~TSENSOR_SENSOR0_CONFIG1_TH1;
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high = tegra_tsensor_temp_to_counter(ts, high);
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val |= FIELD_PREP(TSENSOR_SENSOR0_CONFIG1_TH1, high);
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writel_relaxed(val, tsc->regs + TSENSOR_SENSOR0_CONFIG1);
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return 0;
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}
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static const struct thermal_zone_device_ops ops = {
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.get_temp = tegra_tsensor_get_temp,
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.set_trips = tegra_tsensor_set_trips,
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};
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static bool
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tegra_tsensor_handle_channel_interrupt(const struct tegra_tsensor *ts,
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unsigned int id)
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{
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const struct tegra_tsensor_channel *tsc = &ts->ch[id];
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u32 val;
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val = readl_relaxed(tsc->regs + TSENSOR_SENSOR0_STATUS0);
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writel_relaxed(val, tsc->regs + TSENSOR_SENSOR0_STATUS0);
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if (FIELD_GET(TSENSOR_SENSOR0_STATUS0_STATE, val) == 5)
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dev_err_ratelimited(ts->dev, "ch%u: counter overflowed\n", id);
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if (!FIELD_GET(TSENSOR_SENSOR0_STATUS0_INTR, val))
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return false;
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thermal_zone_device_update(tsc->tzd, THERMAL_EVENT_UNSPECIFIED);
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return true;
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}
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static irqreturn_t tegra_tsensor_isr(int irq, void *data)
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{
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const struct tegra_tsensor *ts = data;
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bool handled = false;
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unsigned int i;
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for (i = 0; i < ARRAY_SIZE(ts->ch); i++)
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handled |= tegra_tsensor_handle_channel_interrupt(ts, i);
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return handled ? IRQ_HANDLED : IRQ_NONE;
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}
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static int tegra_tsensor_disable_hw_channel(const struct tegra_tsensor *ts,
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unsigned int id)
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{
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const struct tegra_tsensor_channel *tsc = &ts->ch[id];
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struct thermal_zone_device *tzd = tsc->tzd;
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u32 val;
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int err;
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if (!tzd)
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goto stop_channel;
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err = thermal_zone_device_disable(tzd);
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if (err) {
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dev_err(ts->dev, "ch%u: failed to disable zone: %d\n", id, err);
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return err;
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}
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stop_channel:
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/* stop channel gracefully */
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val = readl_relaxed(tsc->regs + TSENSOR_SENSOR0_CONFIG0);
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val |= FIELD_PREP(TSENSOR_SENSOR0_CONFIG0_SENSOR_STOP, 1);
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writel_relaxed(val, tsc->regs + TSENSOR_SENSOR0_CONFIG0);
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return 0;
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}
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struct trip_temps {
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int hot_trip;
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int crit_trip;
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};
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static int tegra_tsensor_get_trips_cb(struct thermal_trip *trip, void *arg)
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{
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struct trip_temps *temps = arg;
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if (trip->type == THERMAL_TRIP_HOT)
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temps->hot_trip = trip->temperature;
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else if (trip->type == THERMAL_TRIP_CRITICAL)
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temps->crit_trip = trip->temperature;
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return 0;
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}
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static void tegra_tsensor_get_hw_channel_trips(struct thermal_zone_device *tzd,
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struct trip_temps *temps)
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{
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/*
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* 90C is the maximal critical temperature of all Tegra30 SoC variants,
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* use it for the default trip if unspecified in a device-tree.
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*/
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temps->hot_trip = 85000;
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temps->crit_trip = 90000;
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thermal_zone_for_each_trip(tzd, tegra_tsensor_get_trips_cb, temps);
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/* clamp hardware trips to the calibration limits */
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temps->hot_trip = clamp(temps->hot_trip, 25000, 90000);
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/*
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* Kernel will perform a normal system shut down if it will
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* see that critical temperature is breached, hence set the
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* hardware limit by 5C higher in order to allow system to
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* shut down gracefully before sending signal to the Power
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* Management controller.
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*/
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temps->crit_trip = clamp(temps->crit_trip + 5000, 25000, 90000);
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}
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static int tegra_tsensor_enable_hw_channel(const struct tegra_tsensor *ts,
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unsigned int id)
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{
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const struct tegra_tsensor_channel *tsc = &ts->ch[id];
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struct thermal_zone_device *tzd = tsc->tzd;
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struct trip_temps temps = { 0 };
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int err;
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u32 val;
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if (!tzd) {
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val = readl_relaxed(tsc->regs + TSENSOR_SENSOR0_CONFIG0);
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val &= ~TSENSOR_SENSOR0_CONFIG0_SENSOR_STOP;
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writel_relaxed(val, tsc->regs + TSENSOR_SENSOR0_CONFIG0);
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return 0;
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}
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tegra_tsensor_get_hw_channel_trips(tzd, &temps);
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dev_info_once(ts->dev, "ch%u: PMC emergency shutdown trip set to %dC\n",
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id, DIV_ROUND_CLOSEST(temps.crit_trip, 1000));
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temps.hot_trip = tegra_tsensor_temp_to_counter(ts, temps.hot_trip);
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temps.crit_trip = tegra_tsensor_temp_to_counter(ts, temps.crit_trip);
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/* program LEVEL2 counter threshold */
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val = readl_relaxed(tsc->regs + TSENSOR_SENSOR0_CONFIG1);
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val &= ~TSENSOR_SENSOR0_CONFIG1_TH2;
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val |= FIELD_PREP(TSENSOR_SENSOR0_CONFIG1_TH2, temps.hot_trip);
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writel_relaxed(val, tsc->regs + TSENSOR_SENSOR0_CONFIG1);
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/* program LEVEL3 counter threshold */
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val = readl_relaxed(tsc->regs + TSENSOR_SENSOR0_CONFIG2);
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val &= ~TSENSOR_SENSOR0_CONFIG2_TH3;
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val |= FIELD_PREP(TSENSOR_SENSOR0_CONFIG2_TH3, temps.crit_trip);
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writel_relaxed(val, tsc->regs + TSENSOR_SENSOR0_CONFIG2);
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/*
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* Enable sensor, emergency shutdown, interrupts for level 1/2/3
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* breaches and counter overflow condition.
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*
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* Disable DIV2 throttle for now since we need to figure out how
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* to integrate it properly with the thermal framework.
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*
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* Thermal levels supported by hardware:
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*
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* Level 0 = cold
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* Level 1 = passive cooling (cpufreq DVFS)
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* Level 2 = passive cooling assisted by hardware (DIV2)
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* Level 3 = emergency shutdown assisted by hardware (PMC)
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*/
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val = readl_relaxed(tsc->regs + TSENSOR_SENSOR0_CONFIG0);
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val &= ~TSENSOR_SENSOR0_CONFIG0_SENSOR_STOP;
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val |= FIELD_PREP(TSENSOR_SENSOR0_CONFIG0_DVFS_EN, 1);
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val |= FIELD_PREP(TSENSOR_SENSOR0_CONFIG0_HW_FREQ_DIV_EN, 0);
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val |= FIELD_PREP(TSENSOR_SENSOR0_CONFIG0_THERMAL_RST_EN, 1);
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val |= FIELD_PREP(TSENSOR_SENSOR0_CONFIG0_INTR_OVERFLOW_EN, 1);
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val |= FIELD_PREP(TSENSOR_SENSOR0_CONFIG0_INTR_HW_FREQ_DIV_EN, 1);
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val |= FIELD_PREP(TSENSOR_SENSOR0_CONFIG0_INTR_THERMAL_RST_EN, 1);
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writel_relaxed(val, tsc->regs + TSENSOR_SENSOR0_CONFIG0);
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err = thermal_zone_device_enable(tzd);
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if (err) {
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dev_err(ts->dev, "ch%u: failed to enable zone: %d\n", id, err);
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return err;
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}
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return 0;
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}
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static bool tegra_tsensor_fuse_read_spare(unsigned int spare)
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{
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u32 val = 0;
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tegra_fuse_readl(TEGRA30_FUSE_SPARE_BIT + spare * 4, &val);
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return !!val;
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}
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static int tegra_tsensor_nvmem_setup(struct tegra_tsensor *ts)
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{
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u32 i, ate_ver = 0, cal = 0, t1_25C = 0, t2_90C = 0;
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int err, c1_25C, c2_90C;
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err = tegra_fuse_readl(TEGRA30_FUSE_TEST_PROG_VER, &ate_ver);
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if (err) {
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dev_err_probe(ts->dev, err, "failed to get ATE version\n");
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return err;
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}
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if (ate_ver < 8) {
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dev_info(ts->dev, "unsupported ATE version: %u\n", ate_ver);
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return -ENODEV;
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}
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/*
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* We have two TSENSOR channels in a two different spots on SoC.
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* Second channel provides more accurate data on older SoC versions,
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* use it as a primary channel.
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*/
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if (ate_ver <= 21) {
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dev_info_once(ts->dev,
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"older ATE version detected, channels remapped\n");
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ts->swap_channels = true;
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}
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err = tegra_fuse_readl(TEGRA30_FUSE_TSENSOR_CALIB, &cal);
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if (err) {
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dev_err(ts->dev, "failed to get calibration data: %d\n", err);
|
|
return err;
|
|
}
|
|
|
|
/* get calibrated counter values for 25C/90C thresholds */
|
|
c1_25C = FIELD_GET(TEGRA30_FUSE_TSENSOR_CALIB_LOW, cal);
|
|
c2_90C = FIELD_GET(TEGRA30_FUSE_TSENSOR_CALIB_HIGH, cal);
|
|
|
|
/* and calibrated temperatures corresponding to the counter values */
|
|
for (i = 0; i < 7; i++) {
|
|
t1_25C |= tegra_tsensor_fuse_read_spare(14 + i) << i;
|
|
t1_25C |= tegra_tsensor_fuse_read_spare(21 + i) << i;
|
|
|
|
t2_90C |= tegra_tsensor_fuse_read_spare(0 + i) << i;
|
|
t2_90C |= tegra_tsensor_fuse_read_spare(7 + i) << i;
|
|
}
|
|
|
|
if (c2_90C - c1_25C <= t2_90C - t1_25C) {
|
|
dev_err(ts->dev, "invalid calibration data: %d %d %u %u\n",
|
|
c2_90C, c1_25C, t2_90C, t1_25C);
|
|
return -EINVAL;
|
|
}
|
|
|
|
/* all calibration coefficients are premultiplied by 1000000 */
|
|
|
|
ts->calib.a = DIV_ROUND_CLOSEST((t2_90C - t1_25C) * 1000000,
|
|
(c2_90C - c1_25C));
|
|
|
|
ts->calib.b = t1_25C * 1000000 - ts->calib.a * c1_25C;
|
|
|
|
if (tegra_sku_info.revision == TEGRA_REVISION_A01) {
|
|
ts->calib.m = -2775;
|
|
ts->calib.n = 1338811;
|
|
ts->calib.p = -7300000;
|
|
} else {
|
|
ts->calib.m = -3512;
|
|
ts->calib.n = 1528943;
|
|
ts->calib.p = -11100000;
|
|
}
|
|
|
|
/* except the coefficient of a reduced quadratic equation */
|
|
ts->calib.r = DIV_ROUND_CLOSEST(ts->calib.n, ts->calib.m * 2);
|
|
|
|
dev_info_once(ts->dev,
|
|
"calibration: %d %d %u %u ATE ver: %u SoC rev: %u\n",
|
|
c2_90C, c1_25C, t2_90C, t1_25C, ate_ver,
|
|
tegra_sku_info.revision);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int tegra_tsensor_register_channel(struct tegra_tsensor *ts,
|
|
unsigned int id)
|
|
{
|
|
struct tegra_tsensor_channel *tsc = &ts->ch[id];
|
|
unsigned int hw_id = ts->swap_channels ? !id : id;
|
|
|
|
tsc->ts = ts;
|
|
tsc->id = id;
|
|
tsc->regs = ts->regs + 0x40 * (hw_id + 1);
|
|
|
|
tsc->tzd = devm_thermal_of_zone_register(ts->dev, id, tsc, &ops);
|
|
if (IS_ERR(tsc->tzd)) {
|
|
if (PTR_ERR(tsc->tzd) != -ENODEV)
|
|
return dev_err_probe(ts->dev, PTR_ERR(tsc->tzd),
|
|
"failed to register thermal zone\n");
|
|
|
|
/*
|
|
* It's okay if sensor isn't assigned to any thermal zone
|
|
* in a device-tree.
|
|
*/
|
|
tsc->tzd = NULL;
|
|
return 0;
|
|
}
|
|
|
|
devm_thermal_add_hwmon_sysfs(ts->dev, tsc->tzd);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int tegra_tsensor_probe(struct platform_device *pdev)
|
|
{
|
|
struct tegra_tsensor *ts;
|
|
unsigned int i;
|
|
int err, irq;
|
|
|
|
ts = devm_kzalloc(&pdev->dev, sizeof(*ts), GFP_KERNEL);
|
|
if (!ts)
|
|
return -ENOMEM;
|
|
|
|
irq = platform_get_irq(pdev, 0);
|
|
if (irq < 0)
|
|
return irq;
|
|
|
|
ts->dev = &pdev->dev;
|
|
platform_set_drvdata(pdev, ts);
|
|
|
|
ts->regs = devm_platform_ioremap_resource(pdev, 0);
|
|
if (IS_ERR(ts->regs))
|
|
return PTR_ERR(ts->regs);
|
|
|
|
ts->clk = devm_clk_get(&pdev->dev, NULL);
|
|
if (IS_ERR(ts->clk))
|
|
return dev_err_probe(&pdev->dev, PTR_ERR(ts->clk),
|
|
"failed to get clock\n");
|
|
|
|
ts->rst = devm_reset_control_get_exclusive(&pdev->dev, NULL);
|
|
if (IS_ERR(ts->rst))
|
|
return dev_err_probe(&pdev->dev, PTR_ERR(ts->rst),
|
|
"failed to get reset control\n");
|
|
|
|
err = tegra_tsensor_nvmem_setup(ts);
|
|
if (err)
|
|
return err;
|
|
|
|
err = tegra_tsensor_hw_enable(ts);
|
|
if (err)
|
|
return err;
|
|
|
|
err = devm_add_action_or_reset(&pdev->dev,
|
|
devm_tegra_tsensor_hw_disable,
|
|
ts);
|
|
if (err)
|
|
return err;
|
|
|
|
for (i = 0; i < ARRAY_SIZE(ts->ch); i++) {
|
|
err = tegra_tsensor_register_channel(ts, i);
|
|
if (err)
|
|
return err;
|
|
}
|
|
|
|
/*
|
|
* Enable the channels before setting the interrupt so
|
|
* set_trips() can not be called while we are setting up the
|
|
* register TSENSOR_SENSOR0_CONFIG1. With this we close a
|
|
* potential race window where we are setting up the TH2 and
|
|
* the temperature hits TH1 resulting to an update of the
|
|
* TSENSOR_SENSOR0_CONFIG1 register in the ISR.
|
|
*/
|
|
for (i = 0; i < ARRAY_SIZE(ts->ch); i++) {
|
|
err = tegra_tsensor_enable_hw_channel(ts, i);
|
|
if (err)
|
|
return err;
|
|
}
|
|
|
|
err = devm_request_threaded_irq(&pdev->dev, irq, NULL,
|
|
tegra_tsensor_isr, IRQF_ONESHOT,
|
|
"tegra_tsensor", ts);
|
|
if (err)
|
|
return dev_err_probe(&pdev->dev, err,
|
|
"failed to request interrupt\n");
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int __maybe_unused tegra_tsensor_suspend(struct device *dev)
|
|
{
|
|
struct tegra_tsensor *ts = dev_get_drvdata(dev);
|
|
unsigned int i;
|
|
int err;
|
|
|
|
for (i = 0; i < ARRAY_SIZE(ts->ch); i++) {
|
|
err = tegra_tsensor_disable_hw_channel(ts, i);
|
|
if (err)
|
|
goto enable_channel;
|
|
}
|
|
|
|
err = tegra_tsensor_hw_disable(ts);
|
|
if (err)
|
|
goto enable_channel;
|
|
|
|
return 0;
|
|
|
|
enable_channel:
|
|
while (i--)
|
|
tegra_tsensor_enable_hw_channel(ts, i);
|
|
|
|
return err;
|
|
}
|
|
|
|
static int __maybe_unused tegra_tsensor_resume(struct device *dev)
|
|
{
|
|
struct tegra_tsensor *ts = dev_get_drvdata(dev);
|
|
unsigned int i;
|
|
int err;
|
|
|
|
err = tegra_tsensor_hw_enable(ts);
|
|
if (err)
|
|
return err;
|
|
|
|
for (i = 0; i < ARRAY_SIZE(ts->ch); i++) {
|
|
err = tegra_tsensor_enable_hw_channel(ts, i);
|
|
if (err)
|
|
return err;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct dev_pm_ops tegra_tsensor_pm_ops = {
|
|
SET_NOIRQ_SYSTEM_SLEEP_PM_OPS(tegra_tsensor_suspend,
|
|
tegra_tsensor_resume)
|
|
};
|
|
|
|
static const struct of_device_id tegra_tsensor_of_match[] = {
|
|
{ .compatible = "nvidia,tegra30-tsensor", },
|
|
{},
|
|
};
|
|
MODULE_DEVICE_TABLE(of, tegra_tsensor_of_match);
|
|
|
|
static struct platform_driver tegra_tsensor_driver = {
|
|
.probe = tegra_tsensor_probe,
|
|
.driver = {
|
|
.name = "tegra30-tsensor",
|
|
.of_match_table = tegra_tsensor_of_match,
|
|
.pm = &tegra_tsensor_pm_ops,
|
|
},
|
|
};
|
|
module_platform_driver(tegra_tsensor_driver);
|
|
|
|
MODULE_DESCRIPTION("NVIDIA Tegra30 Thermal Sensor driver");
|
|
MODULE_AUTHOR("Dmitry Osipenko <digetx@gmail.com>");
|
|
MODULE_LICENSE("GPL");
|