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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-08-07 13:11:27 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-08-07 13:11:27 +0000
commit34996e42f82bfd60bc2c191e5cae3c6ab233ec6c (patch)
tree62db60558cbf089714b48daeabca82bf2b20b20e /drivers/thermal/sun8i_thermal.c
parentAdding debian version 6.8.12-1. (diff)
downloadlinux-34996e42f82bfd60bc2c191e5cae3c6ab233ec6c.tar.xz
linux-34996e42f82bfd60bc2c191e5cae3c6ab233ec6c.zip
Merging upstream version 6.9.7.
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'drivers/thermal/sun8i_thermal.c')
-rw-r--r--drivers/thermal/sun8i_thermal.c139
1 files changed, 116 insertions, 23 deletions
diff --git a/drivers/thermal/sun8i_thermal.c b/drivers/thermal/sun8i_thermal.c
index 6a8e386dbc..3203d8bd13 100644
--- a/drivers/thermal/sun8i_thermal.c
+++ b/drivers/thermal/sun8i_thermal.c
@@ -15,6 +15,7 @@
#include <linux/module.h>
#include <linux/nvmem-consumer.h>
#include <linux/of.h>
+#include <linux/of_platform.h>
#include <linux/platform_device.h>
#include <linux/regmap.h>
#include <linux/reset.h>
@@ -50,7 +51,8 @@
#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_CTRL0_T_ACQ(x) (GENMASK(15, 0) & ((x) - 1))
+#define SUN50I_THS_CTRL0_T_SAMPLE_PER(x) ((GENMASK(15, 0) & ((x) - 1)) << 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)
@@ -65,6 +67,7 @@ struct tsensor {
struct ths_thermal_chip {
bool has_mod_clk;
bool has_bus_clk_reset;
+ bool needs_sram;
int sensor_num;
int offset;
int scale;
@@ -82,12 +85,16 @@ struct ths_device {
const struct ths_thermal_chip *chip;
struct device *dev;
struct regmap *regmap;
+ struct regmap_field *sram_regmap_field;
struct reset_control *reset;
struct clk *bus_clk;
struct clk *mod_clk;
struct tsensor sensor[MAX_SENSOR_NUM];
};
+/* The H616 needs to have a bit 16 in the SRAM control register cleared. */
+static const struct reg_field sun8i_ths_sram_reg_field = REG_FIELD(0x0, 16, 16);
+
/* Temp Unit: millidegree Celsius */
static int sun8i_ths_calc_temp(struct ths_device *tmdev,
int id, int reg)
@@ -188,6 +195,9 @@ static irqreturn_t sun8i_irq_thread(int irq, void *data)
int i;
for_each_set_bit(i, &irq_bitmap, tmdev->chip->sensor_num) {
+ /* We allow some zones to not register. */
+ if (IS_ERR(tmdev->sensor[i].tzd))
+ continue;
thermal_zone_device_update(tmdev->sensor[i].tzd,
THERMAL_EVENT_UNSPECIFIED);
}
@@ -221,16 +231,21 @@ static int sun50i_h6_ths_calibrate(struct ths_device *tmdev,
struct device *dev = tmdev->dev;
int i, ft_temp;
- if (!caldata[0] || callen < 2 + 2 * tmdev->chip->sensor_num)
+ if (!caldata[0])
return -EINVAL;
/*
* efuse layout:
*
- * 0 11 16 32
- * +-------+-------+-------+
- * |temp| |sensor0|sensor1|
- * +-------+-------+-------+
+ * 0 11 16 27 32 43 48 57
+ * +----------+-----------+-----------+-----------+
+ * | temp | |sensor0| |sensor1| |sensor2| |
+ * +----------+-----------+-----------+-----------+
+ * ^ ^ ^
+ * | | |
+ * | | sensor3[11:8]
+ * | sensor3[7:4]
+ * sensor3[3:0]
*
* The calibration data on the H6 is the ambient temperature and
* sensor values that are filled during the factory test stage.
@@ -243,9 +258,16 @@ static int sun50i_h6_ths_calibrate(struct ths_device *tmdev,
ft_temp = (caldata[0] & FT_TEMP_MASK) * 100;
for (i = 0; i < tmdev->chip->sensor_num; i++) {
- int sensor_reg = caldata[i + 1] & TEMP_CALIB_MASK;
- int cdata, offset;
- int sensor_temp = tmdev->chip->calc_temp(tmdev, i, sensor_reg);
+ int sensor_reg, sensor_temp, cdata, offset;
+
+ if (i == 3)
+ sensor_reg = (caldata[1] >> 12)
+ | ((caldata[2] >> 12) << 4)
+ | ((caldata[3] >> 12) << 8);
+ else
+ sensor_reg = caldata[i + 1] & TEMP_CALIB_MASK;
+
+ sensor_temp = tmdev->chip->calc_temp(tmdev, i, sensor_reg);
/*
* Calibration data is CALIBRATE_DEFAULT - (calculated
@@ -324,6 +346,34 @@ static void sun8i_ths_reset_control_assert(void *data)
reset_control_assert(data);
}
+static struct regmap *sun8i_ths_get_sram_regmap(struct device_node *node)
+{
+ struct device_node *sram_node;
+ struct platform_device *sram_pdev;
+ struct regmap *regmap = NULL;
+
+ sram_node = of_parse_phandle(node, "allwinner,sram", 0);
+ if (!sram_node)
+ return ERR_PTR(-ENODEV);
+
+ sram_pdev = of_find_device_by_node(sram_node);
+ if (!sram_pdev) {
+ /* platform device might not be probed yet */
+ regmap = ERR_PTR(-EPROBE_DEFER);
+ goto out_put_node;
+ }
+
+ /* If no regmap is found then the other device driver is at fault */
+ regmap = dev_get_regmap(&sram_pdev->dev, NULL);
+ if (!regmap)
+ regmap = ERR_PTR(-EINVAL);
+
+ platform_device_put(sram_pdev);
+out_put_node:
+ of_node_put(sram_node);
+ return regmap;
+}
+
static int sun8i_ths_resource_init(struct ths_device *tmdev)
{
struct device *dev = tmdev->dev;
@@ -368,6 +418,19 @@ static int sun8i_ths_resource_init(struct ths_device *tmdev)
if (ret)
return ret;
+ if (tmdev->chip->needs_sram) {
+ struct regmap *regmap;
+
+ regmap = sun8i_ths_get_sram_regmap(dev->of_node);
+ if (IS_ERR(regmap))
+ return PTR_ERR(regmap);
+ tmdev->sram_regmap_field = devm_regmap_field_alloc(dev,
+ regmap,
+ sun8i_ths_sram_reg_field);
+ if (IS_ERR(tmdev->sram_regmap_field))
+ return PTR_ERR(tmdev->sram_regmap_field);
+ }
+
ret = sun8i_ths_calibrate(tmdev);
if (ret)
return ret;
@@ -410,25 +473,31 @@ static int sun8i_h3_thermal_init(struct ths_device *tmdev)
return 0;
}
-/*
- * Without this undocumented 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;
+ /* The H616 needs to have a bit in the SRAM control register cleared. */
+ if (tmdev->sram_regmap_field)
+ regmap_field_write(tmdev->sram_regmap_field, 0);
+
/*
- * T_acq = 20us
- * clkin = 24MHz
- *
- * x = T_acq * clkin - 1
- * = 479
+ * The manual recommends an overall sample frequency of 50 KHz (20us,
+ * 480 cycles at 24 MHz), which provides plenty of time for both the
+ * acquisition time (>24 cycles) and the actual conversion time
+ * (>14 cycles).
+ * The lower half of the CTRL register holds the "acquire time", in
+ * clock cycles, which the manual recommends to be 2us:
+ * 24MHz * 2us = 48 cycles.
+ * The high half of THS_CTRL encodes the sample frequency, in clock
+ * cycles: 24MHz * 20us = 480 cycles.
+ * This is explained in the H616 manual, but apparently wrongly
+ * described in the H6 manual, although the BSP code does the same
+ * for both SoCs.
*/
regmap_write(tmdev->regmap, SUN50I_THS_CTRL0,
- SUN50I_H6_CTRL0_UNK | SUN50I_THS_CTRL0_T_ACQ(479));
+ SUN50I_THS_CTRL0_T_ACQ(48) |
+ SUN50I_THS_CTRL0_T_SAMPLE_PER(480));
/* average over 4 samples */
regmap_write(tmdev->regmap, SUN50I_H6_THS_MFC,
SUN50I_THS_FILTER_EN |
@@ -465,8 +534,17 @@ static int sun8i_ths_register(struct ths_device *tmdev)
i,
&tmdev->sensor[i],
&ths_ops);
- if (IS_ERR(tmdev->sensor[i].tzd))
- return PTR_ERR(tmdev->sensor[i].tzd);
+
+ /*
+ * If an individual zone fails to register for reasons
+ * other than probe deferral (eg, a bad DT) then carry
+ * on, other zones might register successfully.
+ */
+ if (IS_ERR(tmdev->sensor[i].tzd)) {
+ if (PTR_ERR(tmdev->sensor[i].tzd) == -EPROBE_DEFER)
+ return PTR_ERR(tmdev->sensor[i].tzd);
+ continue;
+ }
devm_thermal_add_hwmon_sysfs(tmdev->dev, tmdev->sensor[i].tzd);
}
@@ -618,6 +696,20 @@ static const struct ths_thermal_chip sun20i_d1_ths = {
.calc_temp = sun8i_ths_calc_temp,
};
+static const struct ths_thermal_chip sun50i_h616_ths = {
+ .sensor_num = 4,
+ .has_bus_clk_reset = true,
+ .needs_sram = true,
+ .ft_deviation = 8000,
+ .offset = 263655,
+ .scale = 810,
+ .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 },
@@ -627,6 +719,7 @@ static const struct of_device_id of_ths_match[] = {
{ .compatible = "allwinner,sun50i-h5-ths", .data = &sun50i_h5_ths },
{ .compatible = "allwinner,sun50i-h6-ths", .data = &sun50i_h6_ths },
{ .compatible = "allwinner,sun20i-d1-ths", .data = &sun20i_d1_ths },
+ { .compatible = "allwinner,sun50i-h616-ths", .data = &sun50i_h616_ths },
{ /* sentinel */ },
};
MODULE_DEVICE_TABLE(of, of_ths_match);