thermal: sun8i: add thermal driver for H6/H5/H3/A64/A83T/R40
This patch adds the support for allwinner thermal sensor, within allwinner SoC. It will register sensors for thermal framework and use device tree to bind cooling device. Signed-off-by: Yangtao Li <tiny.windzz@gmail.com> Signed-off-by: Ondrej Jirman <megous@megous.com> Signed-off-by: Vasily Khoruzhick <anarsoul@gmail.com> Acked-by: Maxime Ripard <mripard@kernel.org>alistair/sunxi64-5.5-dsi
Yangtao Li
Alistair Francis
parent
d5226fa6db
commit
eea70dbdfd
|
|
@ -694,6 +694,14 @@ L: linux-crypto@vger.kernel.org
|
||||||
S: Maintained
|
S: Maintained
|
||||||
F: drivers/crypto/allwinner/
|
F: drivers/crypto/allwinner/
|
||||||
|
|
||||||
|
ALLWINNER THERMAL DRIVER
|
||||||
|
M: Vasily Khoruzhick <anarsoul@gmail.com>
|
||||||
|
M: Yangtao Li <tiny.windzz@gmail.com>
|
||||||
|
L: linux-pm@vger.kernel.org
|
||||||
|
S: Maintained
|
||||||
|
F: Documentation/devicetree/bindings/thermal/allwinner,sun8i-a83t-ths.yaml
|
||||||
|
F: drivers/thermal/sun8i_thermal.c
|
||||||
|
|
||||||
ALLWINNER VPU DRIVER
|
ALLWINNER VPU DRIVER
|
||||||
M: Maxime Ripard <mripard@kernel.org>
|
M: Maxime Ripard <mripard@kernel.org>
|
||||||
M: Paul Kocialkowski <paul.kocialkowski@bootlin.com>
|
M: Paul Kocialkowski <paul.kocialkowski@bootlin.com>
|
||||||
|
|
|
||||||
|
|
@ -263,6 +263,20 @@ config SPEAR_THERMAL
|
||||||
Enable this to plug the SPEAr thermal sensor driver into the Linux
|
Enable this to plug the SPEAr thermal sensor driver into the Linux
|
||||||
thermal framework.
|
thermal framework.
|
||||||
|
|
||||||
|
config SUN8I_THERMAL
|
||||||
|
tristate "Allwinner sun8i thermal driver"
|
||||||
|
depends on ARCH_SUNXI || COMPILE_TEST
|
||||||
|
depends on HAS_IOMEM
|
||||||
|
depends on NVMEM
|
||||||
|
depends on OF
|
||||||
|
depends on RESET_CONTROLLER
|
||||||
|
help
|
||||||
|
Support for the sun8i thermal sensor driver into the Linux thermal
|
||||||
|
framework.
|
||||||
|
|
||||||
|
To compile this driver as a module, choose M here: the
|
||||||
|
module will be called sun8i-thermal.
|
||||||
|
|
||||||
config ROCKCHIP_THERMAL
|
config ROCKCHIP_THERMAL
|
||||||
tristate "Rockchip thermal driver"
|
tristate "Rockchip thermal driver"
|
||||||
depends on ARCH_ROCKCHIP || COMPILE_TEST
|
depends on ARCH_ROCKCHIP || COMPILE_TEST
|
||||||
|
|
|
||||||
|
|
@ -31,6 +31,7 @@ thermal_sys-$(CONFIG_DEVFREQ_THERMAL) += devfreq_cooling.o
|
||||||
obj-y += broadcom/
|
obj-y += broadcom/
|
||||||
obj-$(CONFIG_THERMAL_MMIO) += thermal_mmio.o
|
obj-$(CONFIG_THERMAL_MMIO) += thermal_mmio.o
|
||||||
obj-$(CONFIG_SPEAR_THERMAL) += spear_thermal.o
|
obj-$(CONFIG_SPEAR_THERMAL) += spear_thermal.o
|
||||||
|
obj-$(CONFIG_SUN8I_THERMAL) += sun8i_thermal.o
|
||||||
obj-$(CONFIG_ROCKCHIP_THERMAL) += rockchip_thermal.o
|
obj-$(CONFIG_ROCKCHIP_THERMAL) += rockchip_thermal.o
|
||||||
obj-$(CONFIG_RCAR_THERMAL) += rcar_thermal.o
|
obj-$(CONFIG_RCAR_THERMAL) += rcar_thermal.o
|
||||||
obj-$(CONFIG_RCAR_GEN3_THERMAL) += rcar_gen3_thermal.o
|
obj-$(CONFIG_RCAR_GEN3_THERMAL) += rcar_gen3_thermal.o
|
||||||
|
|
|
||||||
|
|
@ -0,0 +1,639 @@
|
||||||
|
// SPDX-License-Identifier: GPL-2.0
|
||||||
|
/*
|
||||||
|
* Thermal sensor driver for Allwinner SOC
|
||||||
|
* Copyright (C) 2019 Yangtao Li
|
||||||
|
*
|
||||||
|
* Based on the work of Icenowy Zheng <icenowy@aosc.io>
|
||||||
|
* Based on the work of Ondrej Jirman <megous@megous.com>
|
||||||
|
* Based on the work of Josef Gajdusek <atx@atx.name>
|
||||||
|
*/
|
||||||
|
|
||||||
|
#include <linux/clk.h>
|
||||||
|
#include <linux/device.h>
|
||||||
|
#include <linux/interrupt.h>
|
||||||
|
#include <linux/module.h>
|
||||||
|
#include <linux/nvmem-consumer.h>
|
||||||
|
#include <linux/of_device.h>
|
||||||
|
#include <linux/platform_device.h>
|
||||||
|
#include <linux/regmap.h>
|
||||||
|
#include <linux/reset.h>
|
||||||
|
#include <linux/slab.h>
|
||||||
|
#include <linux/thermal.h>
|
||||||
|
|
||||||
|
#define MAX_SENSOR_NUM 4
|
||||||
|
|
||||||
|
#define FT_TEMP_MASK GENMASK(11, 0)
|
||||||
|
#define TEMP_CALIB_MASK GENMASK(11, 0)
|
||||||
|
#define CALIBRATE_DEFAULT 0x800
|
||||||
|
|
||||||
|
#define SUN8I_THS_CTRL0 0x00
|
||||||
|
#define SUN8I_THS_CTRL2 0x40
|
||||||
|
#define SUN8I_THS_IC 0x44
|
||||||
|
#define SUN8I_THS_IS 0x48
|
||||||
|
#define SUN8I_THS_MFC 0x70
|
||||||
|
#define SUN8I_THS_TEMP_CALIB 0x74
|
||||||
|
#define SUN8I_THS_TEMP_DATA 0x80
|
||||||
|
|
||||||
|
#define SUN50I_THS_CTRL0 0x00
|
||||||
|
#define SUN50I_H6_THS_ENABLE 0x04
|
||||||
|
#define SUN50I_H6_THS_PC 0x08
|
||||||
|
#define SUN50I_H6_THS_DIC 0x10
|
||||||
|
#define SUN50I_H6_THS_DIS 0x20
|
||||||
|
#define SUN50I_H6_THS_MFC 0x30
|
||||||
|
#define SUN50I_H6_THS_TEMP_CALIB 0xa0
|
||||||
|
#define SUN50I_H6_THS_TEMP_DATA 0xc0
|
||||||
|
|
||||||
|
#define SUN8I_THS_CTRL0_T_ACQ0(x) (GENMASK(15, 0) & (x))
|
||||||
|
#define SUN8I_THS_CTRL2_T_ACQ1(x) ((GENMASK(15, 0) & (x)) << 16)
|
||||||
|
#define SUN8I_THS_DATA_IRQ_STS(x) BIT(x + 8)
|
||||||
|
|
||||||
|
#define SUN50I_THS_CTRL0_T_ACQ(x) ((GENMASK(15, 0) & (x)) << 16)
|
||||||
|
#define SUN50I_THS_FILTER_EN BIT(2)
|
||||||
|
#define SUN50I_THS_FILTER_TYPE(x) (GENMASK(1, 0) & (x))
|
||||||
|
#define SUN50I_H6_THS_PC_TEMP_PERIOD(x) ((GENMASK(19, 0) & (x)) << 12)
|
||||||
|
#define SUN50I_H6_THS_DATA_IRQ_STS(x) BIT(x)
|
||||||
|
|
||||||
|
/* millidegree celsius */
|
||||||
|
#define THS_EFUSE_CP_FT_MASK 0x3000
|
||||||
|
#define THS_EFUSE_CP_FT_BIT 12
|
||||||
|
#define THS_CALIBRATION_IN_FT 1
|
||||||
|
|
||||||
|
struct tsensor {
|
||||||
|
struct ths_device *tmdev;
|
||||||
|
struct thermal_zone_device *tzd;
|
||||||
|
int id;
|
||||||
|
};
|
||||||
|
|
||||||
|
struct ths_thermal_chip {
|
||||||
|
bool has_mod_clk;
|
||||||
|
bool has_bus_clk_reset;
|
||||||
|
int sensor_num;
|
||||||
|
int offset;
|
||||||
|
int scale;
|
||||||
|
int ft_deviation;
|
||||||
|
int temp_data_base;
|
||||||
|
int (*calibrate)(struct ths_device *tmdev,
|
||||||
|
u16 *caldata, int callen);
|
||||||
|
int (*init)(struct ths_device *tmdev);
|
||||||
|
int (*irq_ack)(struct ths_device *tmdev);
|
||||||
|
int (*calc_temp)(struct ths_device *tmdev,
|
||||||
|
int id, int reg);
|
||||||
|
};
|
||||||
|
|
||||||
|
struct ths_device {
|
||||||
|
const struct ths_thermal_chip *chip;
|
||||||
|
struct device *dev;
|
||||||
|
struct regmap *regmap;
|
||||||
|
struct reset_control *reset;
|
||||||
|
struct clk *bus_clk;
|
||||||
|
struct clk *mod_clk;
|
||||||
|
struct tsensor sensor[MAX_SENSOR_NUM];
|
||||||
|
u32 cp_ft_flag;
|
||||||
|
};
|
||||||
|
|
||||||
|
/* Temp Unit: millidegree Celsius */
|
||||||
|
static int sun8i_ths_calc_temp(struct ths_device *tmdev,
|
||||||
|
int id, int reg)
|
||||||
|
{
|
||||||
|
return tmdev->chip->offset - (reg * tmdev->chip->scale / 10);
|
||||||
|
}
|
||||||
|
|
||||||
|
static int sun50i_h5_calc_temp(struct ths_device *tmdev,
|
||||||
|
int id, int reg)
|
||||||
|
{
|
||||||
|
if (reg >= 0x500)
|
||||||
|
return -1191 * reg / 10 + 223000;
|
||||||
|
else if (!id)
|
||||||
|
return -1452 * reg / 10 + 259000;
|
||||||
|
else
|
||||||
|
return -1590 * reg / 10 + 276000;
|
||||||
|
}
|
||||||
|
|
||||||
|
static int sun8i_ths_get_temp(void *data, int *temp)
|
||||||
|
{
|
||||||
|
struct tsensor *s = data;
|
||||||
|
struct ths_device *tmdev = s->tmdev;
|
||||||
|
int val = 0;
|
||||||
|
|
||||||
|
regmap_read(tmdev->regmap, tmdev->chip->temp_data_base +
|
||||||
|
0x4 * s->id, &val);
|
||||||
|
|
||||||
|
/* ths have no data yet */
|
||||||
|
if (!val)
|
||||||
|
return -EAGAIN;
|
||||||
|
|
||||||
|
*temp = tmdev->chip->calc_temp(tmdev, s->id, val);
|
||||||
|
/*
|
||||||
|
* According to the original sdk, there are some platforms(rarely)
|
||||||
|
* that add a fixed offset value after calculating the temperature
|
||||||
|
* value. We can't simply put it on the formula for calculating the
|
||||||
|
* temperature above, because the formula for calculating the
|
||||||
|
* temperature above is also used when the sensor is calibrated. If
|
||||||
|
* do this, the correct calibration formula is hard to know.
|
||||||
|
*/
|
||||||
|
*temp += tmdev->chip->ft_deviation;
|
||||||
|
|
||||||
|
return 0;
|
||||||
|
}
|
||||||
|
|
||||||
|
static const struct thermal_zone_of_device_ops ths_ops = {
|
||||||
|
.get_temp = sun8i_ths_get_temp,
|
||||||
|
};
|
||||||
|
|
||||||
|
static const struct regmap_config config = {
|
||||||
|
.reg_bits = 32,
|
||||||
|
.val_bits = 32,
|
||||||
|
.reg_stride = 4,
|
||||||
|
.fast_io = true,
|
||||||
|
.max_register = 0xfc,
|
||||||
|
};
|
||||||
|
|
||||||
|
static int sun8i_h3_irq_ack(struct ths_device *tmdev)
|
||||||
|
{
|
||||||
|
int i, state, ret = 0;
|
||||||
|
|
||||||
|
regmap_read(tmdev->regmap, SUN8I_THS_IS, &state);
|
||||||
|
|
||||||
|
for (i = 0; i < tmdev->chip->sensor_num; i++) {
|
||||||
|
if (state & SUN8I_THS_DATA_IRQ_STS(i)) {
|
||||||
|
regmap_write(tmdev->regmap, SUN8I_THS_IS,
|
||||||
|
SUN8I_THS_DATA_IRQ_STS(i));
|
||||||
|
ret |= BIT(i);
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
return ret;
|
||||||
|
}
|
||||||
|
|
||||||
|
static int sun50i_h6_irq_ack(struct ths_device *tmdev)
|
||||||
|
{
|
||||||
|
int i, state, ret = 0;
|
||||||
|
|
||||||
|
regmap_read(tmdev->regmap, SUN50I_H6_THS_DIS, &state);
|
||||||
|
|
||||||
|
for (i = 0; i < tmdev->chip->sensor_num; i++) {
|
||||||
|
if (state & SUN50I_H6_THS_DATA_IRQ_STS(i)) {
|
||||||
|
regmap_write(tmdev->regmap, SUN50I_H6_THS_DIS,
|
||||||
|
SUN50I_H6_THS_DATA_IRQ_STS(i));
|
||||||
|
ret |= BIT(i);
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
return ret;
|
||||||
|
}
|
||||||
|
|
||||||
|
static irqreturn_t sun8i_irq_thread(int irq, void *data)
|
||||||
|
{
|
||||||
|
struct ths_device *tmdev = data;
|
||||||
|
int i, state;
|
||||||
|
|
||||||
|
state = tmdev->chip->irq_ack(tmdev);
|
||||||
|
|
||||||
|
for (i = 0; i < tmdev->chip->sensor_num; i++) {
|
||||||
|
if (state & BIT(i))
|
||||||
|
thermal_zone_device_update(tmdev->sensor[i].tzd,
|
||||||
|
THERMAL_EVENT_UNSPECIFIED);
|
||||||
|
}
|
||||||
|
|
||||||
|
return IRQ_HANDLED;
|
||||||
|
}
|
||||||
|
|
||||||
|
static int sun8i_h3_ths_calibrate(struct ths_device *tmdev,
|
||||||
|
u16 *caldata, int callen)
|
||||||
|
{
|
||||||
|
int i;
|
||||||
|
|
||||||
|
if (!caldata[0] || callen < 2 * tmdev->chip->sensor_num)
|
||||||
|
return -EINVAL;
|
||||||
|
|
||||||
|
for (i = 0; i < tmdev->chip->sensor_num; i++) {
|
||||||
|
int offset = (i % 2) << 4;
|
||||||
|
|
||||||
|
regmap_update_bits(tmdev->regmap,
|
||||||
|
SUN8I_THS_TEMP_CALIB + (4 * (i >> 1)),
|
||||||
|
0xfff << offset,
|
||||||
|
caldata[i] << offset);
|
||||||
|
}
|
||||||
|
|
||||||
|
return 0;
|
||||||
|
}
|
||||||
|
|
||||||
|
static int sun50i_h6_ths_calibrate(struct ths_device *tmdev,
|
||||||
|
u16 *caldata, int callen)
|
||||||
|
{
|
||||||
|
struct device *dev = tmdev->dev;
|
||||||
|
int i, ft_temp;
|
||||||
|
|
||||||
|
if (!caldata[0] || callen < 2 + 2 * tmdev->chip->sensor_num)
|
||||||
|
return -EINVAL;
|
||||||
|
|
||||||
|
/*
|
||||||
|
* efuse layout:
|
||||||
|
*
|
||||||
|
* 0 11 16 32
|
||||||
|
* +-------+-------+-------+
|
||||||
|
* |temp| |sensor0|sensor1|
|
||||||
|
* +-------+-------+-------+
|
||||||
|
*
|
||||||
|
* The calibration data on the H6 is the ambient temperature and
|
||||||
|
* sensor values that are filled during the factory test stage.
|
||||||
|
*
|
||||||
|
* The unit of stored FT temperature is 0.1 degreee celusis.
|
||||||
|
*
|
||||||
|
* We need to calculate a delta between measured and caluclated
|
||||||
|
* register values and this will become a calibration offset.
|
||||||
|
*/
|
||||||
|
ft_temp = (caldata[0] & FT_TEMP_MASK) * 100;
|
||||||
|
tmdev->cp_ft_flag = (caldata[0] & THS_EFUSE_CP_FT_MASK)
|
||||||
|
>> THS_EFUSE_CP_FT_BIT;
|
||||||
|
|
||||||
|
for (i = 0; i < tmdev->chip->sensor_num; i++) {
|
||||||
|
int sensor_reg = caldata[i + 1];
|
||||||
|
int cdata, offset;
|
||||||
|
int sensor_temp = tmdev->chip->calc_temp(tmdev, i, sensor_reg);
|
||||||
|
|
||||||
|
/*
|
||||||
|
* Calibration data is CALIBRATE_DEFAULT - (calculated
|
||||||
|
* temperature from sensor reading at factory temperature
|
||||||
|
* minus actual factory temperature) * 14.88 (scale from
|
||||||
|
* temperature to register values)
|
||||||
|
*/
|
||||||
|
cdata = CALIBRATE_DEFAULT -
|
||||||
|
((sensor_temp - ft_temp) * 10 / tmdev->chip->scale);
|
||||||
|
if (cdata & ~TEMP_CALIB_MASK) {
|
||||||
|
/*
|
||||||
|
* Calibration value more than 12-bit, but calibration
|
||||||
|
* register is 12-bit. In this case, ths hardware can
|
||||||
|
* still work without calibration, although the data
|
||||||
|
* won't be so accurate.
|
||||||
|
*/
|
||||||
|
dev_warn(dev, "sensor%d is not calibrated.\n", i);
|
||||||
|
continue;
|
||||||
|
}
|
||||||
|
|
||||||
|
offset = (i % 2) * 16;
|
||||||
|
regmap_update_bits(tmdev->regmap,
|
||||||
|
SUN50I_H6_THS_TEMP_CALIB + (i / 2 * 4),
|
||||||
|
0xfff << offset,
|
||||||
|
cdata << offset);
|
||||||
|
}
|
||||||
|
|
||||||
|
return 0;
|
||||||
|
}
|
||||||
|
|
||||||
|
static int sun8i_ths_calibrate(struct ths_device *tmdev)
|
||||||
|
{
|
||||||
|
struct nvmem_cell *calcell;
|
||||||
|
struct device *dev = tmdev->dev;
|
||||||
|
u16 *caldata;
|
||||||
|
size_t callen;
|
||||||
|
int ret = 0;
|
||||||
|
|
||||||
|
calcell = devm_nvmem_cell_get(dev, "calibration");
|
||||||
|
if (IS_ERR(calcell)) {
|
||||||
|
if (PTR_ERR(calcell) == -EPROBE_DEFER)
|
||||||
|
return -EPROBE_DEFER;
|
||||||
|
/*
|
||||||
|
* Even if the external calibration data stored in sid is
|
||||||
|
* not accessible, the THS hardware can still work, although
|
||||||
|
* the data won't be so accurate.
|
||||||
|
*
|
||||||
|
* The default value of calibration register is 0x800 for
|
||||||
|
* every sensor, and the calibration value is usually 0x7xx
|
||||||
|
* or 0x8xx, so they won't be away from the default value
|
||||||
|
* for a lot.
|
||||||
|
*
|
||||||
|
* So here we do not return error if the calibartion data is
|
||||||
|
* not available, except the probe needs deferring.
|
||||||
|
*/
|
||||||
|
goto out;
|
||||||
|
}
|
||||||
|
|
||||||
|
caldata = nvmem_cell_read(calcell, &callen);
|
||||||
|
if (IS_ERR(caldata)) {
|
||||||
|
ret = PTR_ERR(caldata);
|
||||||
|
goto out;
|
||||||
|
}
|
||||||
|
|
||||||
|
tmdev->chip->calibrate(tmdev, caldata, callen);
|
||||||
|
|
||||||
|
kfree(caldata);
|
||||||
|
out:
|
||||||
|
return ret;
|
||||||
|
}
|
||||||
|
|
||||||
|
static int sun8i_ths_resource_init(struct ths_device *tmdev)
|
||||||
|
{
|
||||||
|
struct device *dev = tmdev->dev;
|
||||||
|
struct platform_device *pdev = to_platform_device(dev);
|
||||||
|
void __iomem *base;
|
||||||
|
int ret;
|
||||||
|
|
||||||
|
base = devm_platform_ioremap_resource(pdev, 0);
|
||||||
|
if (IS_ERR(base))
|
||||||
|
return PTR_ERR(base);
|
||||||
|
|
||||||
|
tmdev->regmap = devm_regmap_init_mmio(dev, base, &config);
|
||||||
|
if (IS_ERR(tmdev->regmap))
|
||||||
|
return PTR_ERR(tmdev->regmap);
|
||||||
|
|
||||||
|
if (tmdev->chip->has_bus_clk_reset) {
|
||||||
|
tmdev->reset = devm_reset_control_get(dev, 0);
|
||||||
|
if (IS_ERR(tmdev->reset))
|
||||||
|
return PTR_ERR(tmdev->reset);
|
||||||
|
|
||||||
|
tmdev->bus_clk = devm_clk_get(&pdev->dev, "bus");
|
||||||
|
if (IS_ERR(tmdev->bus_clk))
|
||||||
|
return PTR_ERR(tmdev->bus_clk);
|
||||||
|
}
|
||||||
|
|
||||||
|
if (tmdev->chip->has_mod_clk) {
|
||||||
|
tmdev->mod_clk = devm_clk_get(&pdev->dev, "mod");
|
||||||
|
if (IS_ERR(tmdev->mod_clk))
|
||||||
|
return PTR_ERR(tmdev->mod_clk);
|
||||||
|
}
|
||||||
|
|
||||||
|
ret = reset_control_deassert(tmdev->reset);
|
||||||
|
if (ret)
|
||||||
|
return ret;
|
||||||
|
|
||||||
|
ret = clk_prepare_enable(tmdev->bus_clk);
|
||||||
|
if (ret)
|
||||||
|
goto assert_reset;
|
||||||
|
|
||||||
|
ret = clk_set_rate(tmdev->mod_clk, 24000000);
|
||||||
|
if (ret)
|
||||||
|
goto bus_disable;
|
||||||
|
|
||||||
|
ret = clk_prepare_enable(tmdev->mod_clk);
|
||||||
|
if (ret)
|
||||||
|
goto bus_disable;
|
||||||
|
|
||||||
|
ret = sun8i_ths_calibrate(tmdev);
|
||||||
|
if (ret)
|
||||||
|
goto mod_disable;
|
||||||
|
|
||||||
|
return 0;
|
||||||
|
|
||||||
|
mod_disable:
|
||||||
|
clk_disable_unprepare(tmdev->mod_clk);
|
||||||
|
bus_disable:
|
||||||
|
clk_disable_unprepare(tmdev->bus_clk);
|
||||||
|
assert_reset:
|
||||||
|
reset_control_assert(tmdev->reset);
|
||||||
|
|
||||||
|
return ret;
|
||||||
|
}
|
||||||
|
|
||||||
|
static int sun8i_h3_thermal_init(struct ths_device *tmdev)
|
||||||
|
{
|
||||||
|
int val;
|
||||||
|
|
||||||
|
/* average over 4 samples */
|
||||||
|
regmap_write(tmdev->regmap, SUN8I_THS_MFC,
|
||||||
|
SUN50I_THS_FILTER_EN |
|
||||||
|
SUN50I_THS_FILTER_TYPE(1));
|
||||||
|
/*
|
||||||
|
* clkin = 24MHz
|
||||||
|
* filter_samples = 4
|
||||||
|
* period = 0.25s
|
||||||
|
*
|
||||||
|
* x = period * clkin / 4096 / filter_samples - 1
|
||||||
|
* = 365
|
||||||
|
*/
|
||||||
|
val = GENMASK(7 + tmdev->chip->sensor_num, 8);
|
||||||
|
regmap_write(tmdev->regmap, SUN8I_THS_IC,
|
||||||
|
SUN50I_H6_THS_PC_TEMP_PERIOD(365) | val);
|
||||||
|
/*
|
||||||
|
* T_acq = 20us
|
||||||
|
* clkin = 24MHz
|
||||||
|
*
|
||||||
|
* x = T_acq * clkin - 1
|
||||||
|
* = 479
|
||||||
|
*/
|
||||||
|
regmap_write(tmdev->regmap, SUN8I_THS_CTRL0,
|
||||||
|
SUN8I_THS_CTRL0_T_ACQ0(479));
|
||||||
|
val = GENMASK(tmdev->chip->sensor_num - 1, 0);
|
||||||
|
regmap_write(tmdev->regmap, SUN8I_THS_CTRL2,
|
||||||
|
SUN8I_THS_CTRL2_T_ACQ1(479) | val);
|
||||||
|
|
||||||
|
return 0;
|
||||||
|
}
|
||||||
|
|
||||||
|
/*
|
||||||
|
* Without this undocummented value, the returned temperatures would
|
||||||
|
* be higher than real ones by about 20C.
|
||||||
|
*/
|
||||||
|
#define SUN50I_H6_CTRL0_UNK 0x0000002f
|
||||||
|
|
||||||
|
static int sun50i_h6_thermal_init(struct ths_device *tmdev)
|
||||||
|
{
|
||||||
|
int val;
|
||||||
|
|
||||||
|
/*
|
||||||
|
* T_acq = 20us
|
||||||
|
* clkin = 24MHz
|
||||||
|
*
|
||||||
|
* x = T_acq * clkin - 1
|
||||||
|
* = 479
|
||||||
|
*/
|
||||||
|
regmap_write(tmdev->regmap, SUN50I_THS_CTRL0,
|
||||||
|
SUN50I_H6_CTRL0_UNK | SUN50I_THS_CTRL0_T_ACQ(479));
|
||||||
|
/* average over 4 samples */
|
||||||
|
regmap_write(tmdev->regmap, SUN50I_H6_THS_MFC,
|
||||||
|
SUN50I_THS_FILTER_EN |
|
||||||
|
SUN50I_THS_FILTER_TYPE(1));
|
||||||
|
/*
|
||||||
|
* clkin = 24MHz
|
||||||
|
* filter_samples = 4
|
||||||
|
* period = 0.25s
|
||||||
|
*
|
||||||
|
* x = period * clkin / 4096 / filter_samples - 1
|
||||||
|
* = 365
|
||||||
|
*/
|
||||||
|
regmap_write(tmdev->regmap, SUN50I_H6_THS_PC,
|
||||||
|
SUN50I_H6_THS_PC_TEMP_PERIOD(365));
|
||||||
|
/* enable sensor */
|
||||||
|
val = GENMASK(tmdev->chip->sensor_num - 1, 0);
|
||||||
|
regmap_write(tmdev->regmap, SUN50I_H6_THS_ENABLE, val);
|
||||||
|
/* thermal data interrupt enable */
|
||||||
|
val = GENMASK(tmdev->chip->sensor_num - 1, 0);
|
||||||
|
regmap_write(tmdev->regmap, SUN50I_H6_THS_DIC, val);
|
||||||
|
|
||||||
|
return 0;
|
||||||
|
}
|
||||||
|
|
||||||
|
static int sun8i_ths_register(struct ths_device *tmdev)
|
||||||
|
{
|
||||||
|
int i;
|
||||||
|
|
||||||
|
for (i = 0; i < tmdev->chip->sensor_num; i++) {
|
||||||
|
tmdev->sensor[i].tmdev = tmdev;
|
||||||
|
tmdev->sensor[i].id = i;
|
||||||
|
tmdev->sensor[i].tzd =
|
||||||
|
devm_thermal_zone_of_sensor_register(tmdev->dev,
|
||||||
|
i,
|
||||||
|
&tmdev->sensor[i],
|
||||||
|
&ths_ops);
|
||||||
|
if (IS_ERR(tmdev->sensor[i].tzd))
|
||||||
|
return PTR_ERR(tmdev->sensor[i].tzd);
|
||||||
|
}
|
||||||
|
|
||||||
|
return 0;
|
||||||
|
}
|
||||||
|
|
||||||
|
static int sun8i_ths_probe(struct platform_device *pdev)
|
||||||
|
{
|
||||||
|
struct ths_device *tmdev;
|
||||||
|
struct device *dev = &pdev->dev;
|
||||||
|
int ret, irq;
|
||||||
|
|
||||||
|
tmdev = devm_kzalloc(dev, sizeof(*tmdev), GFP_KERNEL);
|
||||||
|
if (!tmdev)
|
||||||
|
return -ENOMEM;
|
||||||
|
|
||||||
|
tmdev->dev = dev;
|
||||||
|
tmdev->chip = of_device_get_match_data(&pdev->dev);
|
||||||
|
if (!tmdev->chip)
|
||||||
|
return -EINVAL;
|
||||||
|
|
||||||
|
platform_set_drvdata(pdev, tmdev);
|
||||||
|
|
||||||
|
ret = sun8i_ths_resource_init(tmdev);
|
||||||
|
if (ret)
|
||||||
|
return ret;
|
||||||
|
|
||||||
|
irq = platform_get_irq(pdev, 0);
|
||||||
|
if (irq < 0)
|
||||||
|
return irq;
|
||||||
|
|
||||||
|
ret = tmdev->chip->init(tmdev);
|
||||||
|
if (ret)
|
||||||
|
return ret;
|
||||||
|
|
||||||
|
ret = sun8i_ths_register(tmdev);
|
||||||
|
if (ret)
|
||||||
|
return ret;
|
||||||
|
|
||||||
|
/*
|
||||||
|
* Avoid entering the interrupt handler, the thermal device is not
|
||||||
|
* registered yet, we deffer the registration of the interrupt to
|
||||||
|
* the end.
|
||||||
|
*/
|
||||||
|
ret = devm_request_threaded_irq(dev, irq, NULL,
|
||||||
|
sun8i_irq_thread,
|
||||||
|
IRQF_ONESHOT, "ths", tmdev);
|
||||||
|
if (ret)
|
||||||
|
return ret;
|
||||||
|
|
||||||
|
return 0;
|
||||||
|
}
|
||||||
|
|
||||||
|
static int sun8i_ths_remove(struct platform_device *pdev)
|
||||||
|
{
|
||||||
|
struct ths_device *tmdev = platform_get_drvdata(pdev);
|
||||||
|
|
||||||
|
clk_disable_unprepare(tmdev->mod_clk);
|
||||||
|
clk_disable_unprepare(tmdev->bus_clk);
|
||||||
|
reset_control_assert(tmdev->reset);
|
||||||
|
|
||||||
|
return 0;
|
||||||
|
}
|
||||||
|
|
||||||
|
static const struct ths_thermal_chip sun8i_a83t_ths = {
|
||||||
|
.sensor_num = 3,
|
||||||
|
.scale = 705,
|
||||||
|
.offset = 191668,
|
||||||
|
.temp_data_base = SUN8I_THS_TEMP_DATA,
|
||||||
|
.calibrate = sun8i_h3_ths_calibrate,
|
||||||
|
.init = sun8i_h3_thermal_init,
|
||||||
|
.irq_ack = sun8i_h3_irq_ack,
|
||||||
|
.calc_temp = sun8i_ths_calc_temp,
|
||||||
|
};
|
||||||
|
|
||||||
|
static const struct ths_thermal_chip sun8i_h3_ths = {
|
||||||
|
.sensor_num = 1,
|
||||||
|
.scale = 1211,
|
||||||
|
.offset = 217000,
|
||||||
|
.has_mod_clk = true,
|
||||||
|
.has_bus_clk_reset = true,
|
||||||
|
.temp_data_base = SUN8I_THS_TEMP_DATA,
|
||||||
|
.calibrate = sun8i_h3_ths_calibrate,
|
||||||
|
.init = sun8i_h3_thermal_init,
|
||||||
|
.irq_ack = sun8i_h3_irq_ack,
|
||||||
|
.calc_temp = sun8i_ths_calc_temp,
|
||||||
|
};
|
||||||
|
|
||||||
|
static const struct ths_thermal_chip sun8i_r40_ths = {
|
||||||
|
.sensor_num = 3,
|
||||||
|
.offset = 251086,
|
||||||
|
.scale = 1130,
|
||||||
|
.has_mod_clk = true,
|
||||||
|
.has_bus_clk_reset = true,
|
||||||
|
.temp_data_base = SUN8I_THS_TEMP_DATA,
|
||||||
|
.calibrate = sun8i_h3_ths_calibrate,
|
||||||
|
.init = sun8i_h3_thermal_init,
|
||||||
|
.irq_ack = sun8i_h3_irq_ack,
|
||||||
|
.calc_temp = sun8i_ths_calc_temp,
|
||||||
|
};
|
||||||
|
|
||||||
|
static const struct ths_thermal_chip sun50i_a64_ths = {
|
||||||
|
.sensor_num = 3,
|
||||||
|
.offset = 253890,
|
||||||
|
.scale = 1170,
|
||||||
|
.has_mod_clk = true,
|
||||||
|
.has_bus_clk_reset = true,
|
||||||
|
.temp_data_base = SUN8I_THS_TEMP_DATA,
|
||||||
|
.calibrate = sun8i_h3_ths_calibrate,
|
||||||
|
.init = sun8i_h3_thermal_init,
|
||||||
|
.irq_ack = sun8i_h3_irq_ack,
|
||||||
|
.calc_temp = sun8i_ths_calc_temp,
|
||||||
|
};
|
||||||
|
|
||||||
|
static const struct ths_thermal_chip sun50i_h5_ths = {
|
||||||
|
.sensor_num = 2,
|
||||||
|
.has_mod_clk = true,
|
||||||
|
.has_bus_clk_reset = true,
|
||||||
|
.temp_data_base = SUN8I_THS_TEMP_DATA,
|
||||||
|
.calibrate = sun8i_h3_ths_calibrate,
|
||||||
|
.init = sun8i_h3_thermal_init,
|
||||||
|
.irq_ack = sun8i_h3_irq_ack,
|
||||||
|
.calc_temp = sun50i_h5_calc_temp,
|
||||||
|
};
|
||||||
|
|
||||||
|
static const struct ths_thermal_chip sun50i_h6_ths = {
|
||||||
|
.sensor_num = 2,
|
||||||
|
.has_bus_clk_reset = true,
|
||||||
|
.ft_deviation = 7000,
|
||||||
|
.offset = 187744,
|
||||||
|
.scale = 672,
|
||||||
|
.temp_data_base = SUN50I_H6_THS_TEMP_DATA,
|
||||||
|
.calibrate = sun50i_h6_ths_calibrate,
|
||||||
|
.init = sun50i_h6_thermal_init,
|
||||||
|
.irq_ack = sun50i_h6_irq_ack,
|
||||||
|
.calc_temp = sun8i_ths_calc_temp,
|
||||||
|
};
|
||||||
|
|
||||||
|
static const struct of_device_id of_ths_match[] = {
|
||||||
|
{ .compatible = "allwinner,sun8i-a83t-ths", .data = &sun8i_a83t_ths },
|
||||||
|
{ .compatible = "allwinner,sun8i-h3-ths", .data = &sun8i_h3_ths },
|
||||||
|
{ .compatible = "allwinner,sun8i-r40-ths", .data = &sun8i_r40_ths },
|
||||||
|
{ .compatible = "allwinner,sun50i-a64-ths", .data = &sun50i_a64_ths },
|
||||||
|
{ .compatible = "allwinner,sun50i-h5-ths", .data = &sun50i_h5_ths },
|
||||||
|
{ .compatible = "allwinner,sun50i-h6-ths", .data = &sun50i_h6_ths },
|
||||||
|
{ /* sentinel */ },
|
||||||
|
};
|
||||||
|
MODULE_DEVICE_TABLE(of, of_ths_match);
|
||||||
|
|
||||||
|
static struct platform_driver ths_driver = {
|
||||||
|
.probe = sun8i_ths_probe,
|
||||||
|
.remove = sun8i_ths_remove,
|
||||||
|
.driver = {
|
||||||
|
.name = "sun8i-thermal",
|
||||||
|
.of_match_table = of_ths_match,
|
||||||
|
},
|
||||||
|
};
|
||||||
|
module_platform_driver(ths_driver);
|
||||||
|
|
||||||
|
MODULE_DESCRIPTION("Thermal sensor driver for Allwinner SOC");
|
||||||
|
MODULE_LICENSE("GPL v2");
|
||||||
Loading…
Reference in New Issue