Re: [PATCH 08/16] iio: adc: sun4i-gpadc-iio: rework: add interrupt support
From: Philipp Rossak
Date: Sun Jan 28 2018 - 08:49:09 EST
On 28.01.2018 10:06, Jonathan Cameron wrote:
On Fri, 26 Jan 2018 16:19:33 +0100
Philipp Rossak <embed3d@xxxxxxxxx> wrote:
This patch rewors the driver to support interrupts for the thermal part
of the sensor.
This is only available for the newer sensor (currently H3 and A83T).
The interrupt will be trigerd on data available and triggers the update
for the thermal sensors. All newer sensors have different amount of
sensors and different interrupts for each device the reset of the
interrupts need to be done different
For the newer sensors is the autosuspend disabled.
Signed-off-by: Philipp Rossak <embed3d@xxxxxxxxx>
Really minor point inline, otherwise this looks fine to me.
Acked-by: Jonathan Cameron <jonathan.cameron@xxxxxxxxxx>
---
drivers/iio/adc/sun4i-gpadc-iio.c | 68 +++++++++++++++++++++++++++++++++++----
include/linux/mfd/sun4i-gpadc.h | 33 +++++++++++++++++++
2 files changed, 95 insertions(+), 6 deletions(-)
diff --git a/drivers/iio/adc/sun4i-gpadc-iio.c b/drivers/iio/adc/sun4i-gpadc-iio.c
index 7b12666cdd9e..77e07f042730 100644
--- a/drivers/iio/adc/sun4i-gpadc-iio.c
+++ b/drivers/iio/adc/sun4i-gpadc-iio.c
@@ -78,11 +78,14 @@ struct gpadc_data {
u32 ctrl2_map;
u32 sensor_en_map;
u32 filter_map;
+ u32 irq_clear_map;
+ u32 irq_control_map;
bool has_bus_clk;
bool has_bus_rst;
bool has_mod_clk;
int sensor_count;
bool supports_nvmem;
+ bool support_irq;
};
static const struct gpadc_data sun4i_gpadc_data = {
@@ -97,6 +100,7 @@ static const struct gpadc_data sun4i_gpadc_data = {
.sample_end = sun4i_gpadc_sample_end,
.sensor_count = 1,
.supports_nvmem = false,
+ .support_irq = false,
};
static const struct gpadc_data sun5i_gpadc_data = {
@@ -111,6 +115,7 @@ static const struct gpadc_data sun5i_gpadc_data = {
.sample_end = sun4i_gpadc_sample_end,
.sensor_count = 1,
.supports_nvmem = false,
+ .support_irq = false,
};
static const struct gpadc_data sun6i_gpadc_data = {
@@ -125,6 +130,7 @@ static const struct gpadc_data sun6i_gpadc_data = {
.sample_end = sun4i_gpadc_sample_end,
.sensor_count = 1,
.supports_nvmem = false,
+ .support_irq = false,
};
static const struct gpadc_data sun8i_a33_gpadc_data = {
@@ -136,6 +142,7 @@ static const struct gpadc_data sun8i_a33_gpadc_data = {
.sample_end = sun4i_gpadc_sample_end,
.sensor_count = 1,
.supports_nvmem = false,
+ .support_irq = false,
};
struct sun4i_gpadc_iio {
@@ -339,6 +346,11 @@ static int sun4i_gpadc_temp_read(struct iio_dev *indio_dev, int *val,
return 0;
}
+ if (info->data->support_irq) {
+ regmap_read(info->regmap, info->data->temp_data[sensor], val);
+ return 0;
+ }
+
return sun4i_gpadc_read(indio_dev, 0, val, info->temp_data_irq);
}
@@ -436,6 +448,17 @@ static irqreturn_t sun4i_gpadc_fifo_data_irq_handler(int irq, void *dev_id)
return IRQ_HANDLED;
}
+static irqreturn_t sunxi_irq_thread(int irq, void *data)
+{
+ struct sun4i_gpadc_iio *info = data;
+
+ regmap_write(info->regmap, SUNXI_THS_STAT, info->data->irq_clear_map);
+
+ thermal_zone_device_update(info->tzd, THERMAL_EVENT_TEMP_SAMPLE);
+
+ return IRQ_HANDLED;
+}
+
static int sun4i_gpadc_sample_end(struct sun4i_gpadc_iio *info)
{
/* Disable the ADC on IP */
@@ -448,6 +471,8 @@ static int sun4i_gpadc_sample_end(struct sun4i_gpadc_iio *info)
static int sunxi_ths_sample_end(struct sun4i_gpadc_iio *info)
{
+ /* Disable ths interrupt*/
Space before */
^^ Ok, I will rework that.
+ regmap_write(info->regmap, SUNXI_THS_INTC, 0x0);
/* Disable temperature sensor */
regmap_write(info->regmap, SUNXI_THS_CTRL2, 0x0);
@@ -509,9 +534,15 @@ static int sunxi_ths_sample_start(struct sun4i_gpadc_iio *info)
regmap_write(info->regmap, SUNXI_THS_CTRL2,
info->data->ctrl2_map);
+ regmap_write(info->regmap, SUNXI_THS_STAT,
+ info->data->irq_clear_map);
+
regmap_write(info->regmap, SUNXI_THS_FILTER,
info->data->filter_map);
+ regmap_write(info->regmap, SUNXI_THS_INTC,
+ info->data->irq_control_map);
+
regmap_read(info->regmap, SUNXI_THS_CTRL2, &value);
regmap_write(info->regmap, SUNXI_THS_CTRL2,
@@ -625,12 +656,29 @@ static int sun4i_gpadc_probe_dt(struct platform_device *pdev,
struct nvmem_cell *cell;
ssize_t cell_size;
u64 *cell_data;
+ int irq;
info->data = of_device_get_match_data(&pdev->dev);
if (!info->data)
return -ENODEV;
- info->no_irq = true;
+ if (info->data->support_irq) {
+ /* only the new versions of ths support right now irqs */
+ irq = platform_get_irq(pdev, 0);
+ if (irq < 0) {
+ dev_err(&pdev->dev, "failed to get IRQ: %d\n", irq);
+ return irq;
+ }
+
+ ret = devm_request_threaded_irq(&pdev->dev, irq, NULL,
+ sunxi_irq_thread, IRQF_ONESHOT,
+ dev_name(&pdev->dev), info);
+ if (ret)
+ return ret;
+
+ } else
+ info->no_irq = true;
+
indio_dev->num_channels = ARRAY_SIZE(sun8i_a33_gpadc_channels);
indio_dev->channels = sun8i_a33_gpadc_channels;
@@ -840,11 +888,13 @@ static int sun4i_gpadc_probe(struct platform_device *pdev)
if (ret)
return ret;
- pm_runtime_set_autosuspend_delay(&pdev->dev,
- SUN4I_GPADC_AUTOSUSPEND_DELAY);
- pm_runtime_use_autosuspend(&pdev->dev);
- pm_runtime_set_suspended(&pdev->dev);
- pm_runtime_enable(&pdev->dev);
+ if (!info->data->support_irq) {
+ pm_runtime_set_autosuspend_delay(&pdev->dev,
+ SUN4I_GPADC_AUTOSUSPEND_DELAY);
+ pm_runtime_use_autosuspend(&pdev->dev);
+ pm_runtime_set_suspended(&pdev->dev);
+ pm_runtime_enable(&pdev->dev);
+ }
if (IS_ENABLED(CONFIG_THERMAL_OF)) {
for (i = 0; i < info->data->sensor_count; i++) {
@@ -865,6 +915,9 @@ static int sun4i_gpadc_probe(struct platform_device *pdev)
}
}
+ if (info->data->support_irq)
+ info->data->sample_start(info);
+
ret = devm_iio_device_register(&pdev->dev, indio_dev);
if (ret < 0) {
dev_err(&pdev->dev, "could not register the device\n");
@@ -894,6 +947,9 @@ static int sun4i_gpadc_remove(struct platform_device *pdev)
if (!IS_ENABLED(CONFIG_THERMAL_OF))
return 0;
+ if (info->data->support_irq)
+ info->data->sample_end(info);
+
thermal_zone_of_sensor_unregister(info->sensor_device, info->tzd);
if (!info->no_irq)
diff --git a/include/linux/mfd/sun4i-gpadc.h b/include/linux/mfd/sun4i-gpadc.h
index c251002431bd..ab34a96a7ff3 100644
--- a/include/linux/mfd/sun4i-gpadc.h
+++ b/include/linux/mfd/sun4i-gpadc.h
@@ -89,6 +89,8 @@
/* SUNXI_THS COMMON REGISTERS + DEFINES */
#define SUNXI_THS_CTRL0 0x00
#define SUNXI_THS_CTRL2 0x40
+#define SUNXI_THS_INTC 0x44
+#define SUNXI_THS_STAT 0x48
#define SUNXI_THS_FILTER 0x70
#define SUNXI_THS_CDATA_0_1 0x74
#define SUNXI_THS_CDATA_2_3 0x78
@@ -107,6 +109,37 @@
#define SUNXI_THS_TEMP_SENSE_EN2 BIT(2)
#define SUNXI_THS_TEMP_SENSE_EN3 BIT(3)
+#define SUNXI_THS_TEMP_PERIOD(x) (GENMASK(31, 12) & ((x) << 12))
+
+#define SUNXI_THS_INTS_ALARM_OFF_2 BIT(14)
+#define SUNXI_THS_INTS_ALARM_OFF_1 BIT(13)
+#define SUNXI_THS_INTS_ALARM_OFF_0 BIT(12)
+#define SUNXI_THS_INTS_TDATA_IRQ_3 BIT(11)
+#define SUNXI_THS_INTS_TDATA_IRQ_2 BIT(10)
+#define SUNXI_THS_INTS_TDATA_IRQ_1 BIT(9)
+#define SUNXI_THS_INTS_TDATA_IRQ_0 BIT(8)
+#define SUNXI_THS_INTS_SHUT_INT_3 BIT(7)
+#define SUNXI_THS_INTS_SHUT_INT_2 BIT(6)
+#define SUNXI_THS_INTS_SHUT_INT_1 BIT(5)
+#define SUNXI_THS_INTS_SHUT_INT_0 BIT(4)
+#define SUNXI_THS_INTS_ALARM_INT_3 BIT(3)
+#define SUNXI_THS_INTS_ALARM_INT_2 BIT(2)
+#define SUNXI_THS_INTS_ALARM_INT_1 BIT(1)
+#define SUNXI_THS_INTS_ALARM_INT_0 BIT(0)
+
+#define SUNXI_THS_INTC_TDATA_IRQ_EN3 BIT(11)
+#define SUNXI_THS_INTC_TDATA_IRQ_EN2 BIT(10)
+#define SUNXI_THS_INTC_TDATA_IRQ_EN1 BIT(9)
+#define SUNXI_THS_INTC_TDATA_IRQ_EN0 BIT(8)
+#define SUNXI_THS_INTC_SHUT_INT_EN3 BIT(7)
+#define SUNXI_THS_INTC_SHUT_INT_EN2 BIT(6)
+#define SUNXI_THS_INTC_SHUT_INT_EN1 BIT(5)
+#define SUNXI_THS_INTC_SHUT_INT_EN0 BIT(4)
+#define SUNXI_THS_INTC_ALARM_INT_EN3 BIT(3)
+#define SUNXI_THS_INTC_ALARM_INT_EN2 BIT(2)
+#define SUNXI_THS_INTC_ALARM_INT_EN1 BIT(1)
+#define SUNXI_THS_INTC_ALARM_INT_EN0 BIT(0)
+
#define MAX_SENSOR_COUNT 4
struct sun4i_gpadc_dev {
Thanks,
Philipp