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Subject[PATCH v2 10/16] iio: adc: sun4i-gpadc-iio: add support for A83T thermal sensor
Date
This patch adds support for the A83T ths sensor.

The A83T supports interrupts. The interrupt is configured to update the
the sensor values every second.

Signed-off-by: Philipp Rossak <embed3d@gmail.com>
---
drivers/iio/adc/sun4i-gpadc-iio.c | 38 ++++++++++++++++++++++++++++++++++++++
include/linux/mfd/sun4i-gpadc.h | 18 ++++++++++++++++++
2 files changed, 56 insertions(+)

diff --git a/drivers/iio/adc/sun4i-gpadc-iio.c b/drivers/iio/adc/sun4i-gpadc-iio.c
index 8196203d65fe..9f7895ba1966 100644
--- a/drivers/iio/adc/sun4i-gpadc-iio.c
+++ b/drivers/iio/adc/sun4i-gpadc-iio.c
@@ -170,6 +170,40 @@ static const struct gpadc_data sun8i_h3_ths_data = {
SUN8I_H3_THS_TEMP_PERIOD(0x7),
};

+static const struct gpadc_data sun8i_a83t_ths_data = {
+ .temp_offset = -2724,
+ .temp_scale = -70,
+ .temp_data = {SUN8I_H3_THS_TDATA0,
+ SUN8I_A83T_THS_TDATA1,
+ SUN8I_A83T_THS_TDATA2,
+ 0},
+ .sample_start = sunxi_ths_sample_start,
+ .sample_end = sunxi_ths_sample_end,
+ .sensor_count = 3,
+ .supports_nvmem = false,
+ .support_irq = true,
+ .ctrl0_map = SUN4I_GPADC_CTRL0_T_ACQ(0x1f3),
+ .ctrl2_map = SUN8I_H3_THS_ACQ1(0x1f3),
+ .sensor_en_map = SUN8I_H3_THS_TEMP_SENSE_EN0 |
+ SUN8I_A83T_THS_TEMP_SENSE_EN1 |
+ SUN8I_A83T_THS_TEMP_SENSE_EN2,
+ .filter_map = SUN4I_GPADC_CTRL3_FILTER_EN |
+ SUN4I_GPADC_CTRL3_FILTER_TYPE(0x2),
+ .irq_clear_map = SUN8I_H3_THS_INTS_ALARM_INT_0 |
+ SUN8I_A83T_THS_INTS_ALARM_INT_1 |
+ SUN8I_A83T_THS_INTS_ALARM_INT_2 |
+ SUN8I_H3_THS_INTS_SHUT_INT_0 |
+ SUN8I_A83T_THS_INTS_SHUT_INT_1 |
+ SUN8I_A83T_THS_INTS_SHUT_INT_2 |
+ SUN8I_H3_THS_INTS_TDATA_IRQ_0 |
+ SUN8I_A83T_THS_INTS_TDATA_IRQ_1 |
+ SUN8I_A83T_THS_INTS_TDATA_IRQ_2,
+ .irq_control_map = SUN8I_H3_THS_INTC_TDATA_IRQ_EN0 |
+ SUN8I_A83T_THS_INTC_TDATA_IRQ_EN1 |
+ SUN8I_A83T_THS_INTC_TDATA_IRQ_EN2 |
+ SUN8I_H3_THS_TEMP_PERIOD(0x257),
+};
+
struct sun4i_gpadc_iio {
struct iio_dev *indio_dev;
struct completion completion;
@@ -668,6 +702,10 @@ static const struct of_device_id sun4i_gpadc_of_id[] = {
.compatible = "allwinner,sun8i-h3-ths",
.data = &sun8i_h3_ths_data,
},
+ {
+ .compatible = "allwinner,sun8i-a83t-ths",
+ .data = &sun8i_a83t_ths_data,
+ },
{ /* sentinel */ }
};

diff --git a/include/linux/mfd/sun4i-gpadc.h b/include/linux/mfd/sun4i-gpadc.h
index 80b79c31cea3..32f15cc03363 100644
--- a/include/linux/mfd/sun4i-gpadc.h
+++ b/include/linux/mfd/sun4i-gpadc.h
@@ -99,21 +99,39 @@
#define SUNXI_THS_CDATA_0_1 0x74
#define SUNXI_THS_CDATA_2_3 0x78
#define SUN8I_H3_THS_TDATA0 0x80
+#define SUN8I_A83T_THS_TDATA1 0x84
+#define SUN8I_A83T_THS_TDATA2 0x88

#define SUN8I_H3_THS_ACQ1(x) (GENMASK(31, 16) & ((x) << 16))

#define SUN8I_H3_THS_TEMP_SENSE_EN0 BIT(0)
+#define SUN8I_A83T_THS_TEMP_SENSE_EN1 BIT(1)
+#define SUN8I_A83T_THS_TEMP_SENSE_EN2 BIT(2)

#define SUN8I_H3_THS_TEMP_PERIOD(x) (GENMASK(31, 12) & ((x) << 12))

#define SUN8I_H3_THS_INTS_ALARM_INT_0 BIT(0)
+#define SUN8I_A83T_THS_INTS_ALARM_INT_1 BIT(1)
+#define SUN8I_A83T_THS_INTS_ALARM_INT_2 BIT(2)
#define SUN8I_H3_THS_INTS_SHUT_INT_0 BIT(4)
+#define SUN8I_A83T_THS_INTS_SHUT_INT_1 BIT(5)
+#define SUN8I_A83T_THS_INTS_SHUT_INT_2 BIT(6)
#define SUN8I_H3_THS_INTS_TDATA_IRQ_0 BIT(8)
+#define SUN8I_A83T_THS_INTS_TDATA_IRQ_1 BIT(9)
+#define SUN8I_A83T_THS_INTS_TDATA_IRQ_2 BIT(10)
#define SUN8I_H3_THS_INTS_ALARM_OFF_0 BIT(12)
+#define SUN8I_A83T_THS_INTS_ALARM_OFF_1 BIT(13)
+#define SUN8I_A83T_THS_INTS_ALARM_OFF_2 BIT(14)

#define SUN8I_H3_THS_INTC_ALARM_INT_EN0 BIT(0)
+#define SUN8I_A83T_THS_INTC_ALARM_INT_EN1 BIT(1)
+#define SUN8I_A83T_THS_INTC_ALARM_INT_EN2 BIT(2)
#define SUN8I_H3_THS_INTC_SHUT_INT_EN0 BIT(4)
+#define SUN8I_A83T_THS_INTC_SHUT_INT_EN1 BIT(5)
+#define SUN8I_A83T_THS_INTC_SHUT_INT_EN2 BIT(6)
#define SUN8I_H3_THS_INTC_TDATA_IRQ_EN0 BIT(8)
+#define SUN8I_A83T_THS_INTC_TDATA_IRQ_EN1 BIT(9)
+#define SUN8I_A83T_THS_INTC_TDATA_IRQ_EN2 BIT(10)

#define MAX_SENSOR_COUNT 4

--
2.11.0
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