* [PATCH v2 5/6] dt-bindings: iio: sx9310: Add various settings as DT properties
2020-09-30 7:57 [PATCH v2 0/6] iio: sx9310: Support setting various settings Stephen Boyd
@ 2020-09-30 7:57 ` Stephen Boyd
2020-10-06 19:11 ` Rob Herring
2020-09-30 7:57 ` [PATCH v2 6/6] iio: sx9310: Set various settings from DT Stephen Boyd
1 sibling, 1 reply; 4+ messages in thread
From: Stephen Boyd @ 2020-09-30 7:57 UTC (permalink / raw)
To: Jonathan Cameron
Cc: linux-kernel, linux-iio, Daniel Campello, Lars-Peter Clausen,
Peter Meerwald-Stadler, Rob Herring, devicetree,
Douglas Anderson, Gwendal Grignou, Evan Green
We need to set various bits in the hardware registers for this device to
operate properly depending on how it is installed. Add a handful of DT
properties to configure these things.
Cc: Daniel Campello <campello@chromium.org>
Cc: Lars-Peter Clausen <lars@metafoo.de>
Cc: Peter Meerwald-Stadler <pmeerw@pmeerw.net>
Cc: Rob Herring <robh+dt@kernel.org>
Cc: <devicetree@vger.kernel.org>
Cc: Douglas Anderson <dianders@chromium.org>
Cc: Gwendal Grignou <gwendal@chromium.org>
Cc: Evan Green <evgreen@chromium.org>
Signed-off-by: Stephen Boyd <swboyd@chromium.org>
---
.../iio/proximity/semtech,sx9310.yaml | 61 +++++++++++++++++++
1 file changed, 61 insertions(+)
diff --git a/Documentation/devicetree/bindings/iio/proximity/semtech,sx9310.yaml b/Documentation/devicetree/bindings/iio/proximity/semtech,sx9310.yaml
index 5739074d3592..a85b8fa25861 100644
--- a/Documentation/devicetree/bindings/iio/proximity/semtech,sx9310.yaml
+++ b/Documentation/devicetree/bindings/iio/proximity/semtech,sx9310.yaml
@@ -40,6 +40,61 @@ properties:
"#io-channel-cells":
const: 1
+ semtech,cs0-ground:
+ description: Indicates the CS0 sensor is connected to ground.
+ type: boolean
+
+ semtech,combined-sensors:
+ $ref: /schemas/types.yaml#/definitions/uint32-array
+ description: |
+ List of which sensors are combined and represented by CS3.
+ Possible values are -
+ 3 - CS3 (internal)
+ 0 1 - CS0 + CS1
+ 1 2 - CS1 + CS2 (default)
+ 0 1 2 3 - CS0 + CS1 + CS2 + CS3
+ minItems: 1
+ maxItems: 4
+
+ semtech,resolution:
+ description:
+ Capacitance measure resolution. Refer to datasheet for more details.
+ enum:
+ - coarsest
+ - very-coarse
+ - coarse
+ - medium-coarse
+ - medium
+ - fine
+ - very-fine
+ - finest
+
+ semtech,startup-sensor:
+ $ref: /schemas/types.yaml#definitions/uint32
+ enum: [0, 1, 2, 3]
+ default: 0
+ description:
+ Sensor used for start-up proximity detection. The combined
+ sensor is represented by the value 3. This is used for initial
+ compensation.
+
+ semtech,proxraw-strength:
+ $ref: /schemas/types.yaml#definitions/uint32
+ enum: [0, 2, 4, 8]
+ default: 2
+ description:
+ PROXRAW filter strength. A value of 0 represents off, and other values
+ represent 1-1/N.
+
+ semtech,avg-pos-strength:
+ $ref: /schemas/types.yaml#definitions/uint32
+ enum: [0, 16, 64, 128, 256, 512, 1024, 4294967295]
+ default: 16
+ description:
+ Average positive filter strength. A value of 0 represents off and
+ UINT_MAX (4294967295) represents infinite. Other values
+ represent 1-1/N.
+
required:
- compatible
- reg
@@ -61,5 +116,11 @@ examples:
vdd-supply = <&pp3300_a>;
svdd-supply = <&pp1800_prox>;
#io-channel-cells = <1>;
+ semtech,cs0-ground;
+ semtech,combined-sensors = <1 2 3>;
+ semtech,resolution = "fine";
+ semtech,startup-sensor = <1>;
+ semtech,proxraw-strength = <2>;
+ semtech,avg-pos-strength = <64>;
};
};
--
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^ permalink raw reply related [flat|nested] 4+ messages in thread* [PATCH v2 6/6] iio: sx9310: Set various settings from DT
2020-09-30 7:57 [PATCH v2 0/6] iio: sx9310: Support setting various settings Stephen Boyd
2020-09-30 7:57 ` [PATCH v2 5/6] dt-bindings: iio: sx9310: Add various settings as DT properties Stephen Boyd
@ 2020-09-30 7:57 ` Stephen Boyd
1 sibling, 0 replies; 4+ messages in thread
From: Stephen Boyd @ 2020-09-30 7:57 UTC (permalink / raw)
To: Jonathan Cameron
Cc: linux-kernel, linux-iio, Daniel Campello, Lars-Peter Clausen,
Peter Meerwald-Stadler, Rob Herring, devicetree,
Douglas Anderson, Gwendal Grignou, Evan Green
These properties need to be set during driver probe. Parse any DT
properties and replace the default register settings with the ones
parsed from DT.
Cc: Daniel Campello <campello@chromium.org>
Cc: Lars-Peter Clausen <lars@metafoo.de>
Cc: Peter Meerwald-Stadler <pmeerw@pmeerw.net>
Cc: Rob Herring <robh+dt@kernel.org>
Cc: <devicetree@vger.kernel.org>
Cc: Douglas Anderson <dianders@chromium.org>
Cc: Gwendal Grignou <gwendal@chromium.org>
Cc: Evan Green <evgreen@chromium.org>
Signed-off-by: Stephen Boyd <swboyd@chromium.org>
---
drivers/iio/proximity/sx9310.c | 141 ++++++++++++++++++++++++++++++++-
1 file changed, 140 insertions(+), 1 deletion(-)
diff --git a/drivers/iio/proximity/sx9310.c b/drivers/iio/proximity/sx9310.c
index 3f909177eca9..1e9a4a8bc717 100644
--- a/drivers/iio/proximity/sx9310.c
+++ b/drivers/iio/proximity/sx9310.c
@@ -49,23 +49,42 @@
#define SX9310_REG_PROX_CTRL0_SCANPERIOD_15MS 0x01
#define SX9310_REG_PROX_CTRL1 0x11
#define SX9310_REG_PROX_CTRL2 0x12
+#define SX9310_REG_PROX_CTRL2_COMBMODE_MASK GENMASK(7, 6)
+#define SX9310_REG_PROX_CTRL2_COMBMODE_CS0_CS1_CS2_CS3 (0x03 << 6)
#define SX9310_REG_PROX_CTRL2_COMBMODE_CS1_CS2 (0x02 << 6)
+#define SX9310_REG_PROX_CTRL2_COMBMODE_CS0_CS1 (0x01 << 6)
+#define SX9310_REG_PROX_CTRL2_COMBMODE_CS3 (0x00 << 6)
+#define SX9310_REG_PROX_CTRL2_SHIELDEN_MASK GENMASK(3, 2)
#define SX9310_REG_PROX_CTRL2_SHIELDEN_DYNAMIC (0x01 << 2)
+#define SX9310_REG_PROX_CTRL2_SHIELDEN_GROUND (0x02 << 2)
#define SX9310_REG_PROX_CTRL3 0x13
#define SX9310_REG_PROX_CTRL3_GAIN0_MASK GENMASK(3, 2)
#define SX9310_REG_PROX_CTRL3_GAIN0_X8 (0x03 << 2)
#define SX9310_REG_PROX_CTRL3_GAIN12_MASK GENMASK(1, 0)
#define SX9310_REG_PROX_CTRL3_GAIN12_X4 0x02
#define SX9310_REG_PROX_CTRL4 0x14
+#define SX9310_REG_PROX_CTRL4_RESOLUTION_MASK GENMASK(2, 0)
#define SX9310_REG_PROX_CTRL4_RESOLUTION_FINEST 0x07
+#define SX9310_REG_PROX_CTRL4_RESOLUTION_VERY_FINE 0x06
+#define SX9310_REG_PROX_CTRL4_RESOLUTION_FINE 0x05
+#define SX9310_REG_PROX_CTRL4_RESOLUTION_MEDIUM 0x04
+#define SX9310_REG_PROX_CTRL4_RESOLUTION_MEDIUM_COARSE 0x03
+#define SX9310_REG_PROX_CTRL4_RESOLUTION_COARSE 0x02
+#define SX9310_REG_PROX_CTRL4_RESOLUTION_VERY_COARSE 0x01
+#define SX9310_REG_PROX_CTRL4_RESOLUTION_COARSEST 0x00
#define SX9310_REG_PROX_CTRL5 0x15
#define SX9310_REG_PROX_CTRL5_RANGE_SMALL (0x03 << 6)
+#define SX9310_REG_PROX_CTRL5_STARTUPSENS_MASK GENMASK(3, 2)
#define SX9310_REG_PROX_CTRL5_STARTUPSENS_CS1 (0x01 << 2)
+#define SX9310_REG_PROX_CTRL5_RAWFILT_MASK GENMASK(1, 0)
+#define SX9310_REG_PROX_CTRL5_RAWFILT_SHIFT 0
#define SX9310_REG_PROX_CTRL5_RAWFILT_1P25 0x02
#define SX9310_REG_PROX_CTRL6 0x16
#define SX9310_REG_PROX_CTRL6_AVGTHRESH_DEFAULT 0x20
#define SX9310_REG_PROX_CTRL7 0x17
#define SX9310_REG_PROX_CTRL7_AVGNEGFILT_2 (0x01 << 3)
+#define SX9310_REG_PROX_CTRL7_AVGPOSFILT_MASK GENMASK(2, 0)
+#define SX9310_REG_PROX_CTRL7_AVGPOSFILT_SHIFT 0
#define SX9310_REG_PROX_CTRL7_AVGPOSFILT_512 0x05
#define SX9310_REG_PROX_CTRL8 0x18
#define SX9310_REG_PROX_CTRL8_9_PTHRESH_MASK GENMASK(7, 3)
@@ -1193,9 +1212,129 @@ static int sx9310_init_compensation(struct iio_dev *indio_dev)
return ret;
}
+static const struct sx9310_reg_default *
+sx9310_get_default_reg(struct sx9310_data *data, int i,
+ struct sx9310_reg_default *reg_def)
+{
+ int ret;
+ const struct device_node *np = data->client->dev.of_node;
+ u32 combined[SX9310_NUM_CHANNELS] = { 4, 4, 4, 4 };
+ unsigned long comb_mask = 0;
+ const char *res;
+ u32 start = 0, raw = 0, pos = 0;
+
+ memcpy(reg_def, &sx9310_default_regs[i], sizeof(*reg_def));
+ if (!np)
+ return reg_def;
+
+ switch (reg_def->reg) {
+ case SX9310_REG_PROX_CTRL2:
+ if (of_property_read_bool(np, "semtech,cs0-ground")) {
+ reg_def->def &= ~SX9310_REG_PROX_CTRL2_SHIELDEN_MASK;
+ reg_def->def |= SX9310_REG_PROX_CTRL2_SHIELDEN_GROUND;
+ }
+
+ reg_def->def &= ~SX9310_REG_PROX_CTRL2_COMBMODE_MASK;
+ of_property_read_u32_array(np, "semtech,combined-sensors",
+ combined, ARRAY_SIZE(combined));
+ for (i = 0; i < ARRAY_SIZE(combined); i++) {
+ if (combined[i] <= SX9310_NUM_CHANNELS)
+ comb_mask |= BIT(combined[i]);
+ }
+
+ comb_mask &= 0xf;
+ if (comb_mask == (BIT(3) | BIT(2) | BIT(1) | BIT(0)))
+ reg_def->def |= SX9310_REG_PROX_CTRL2_COMBMODE_CS0_CS1_CS2_CS3;
+ else if (comb_mask == (BIT(1) | BIT(2)))
+ reg_def->def |= SX9310_REG_PROX_CTRL2_COMBMODE_CS1_CS2;
+ else if (comb_mask == (BIT(0) | BIT(1)))
+ reg_def->def |= SX9310_REG_PROX_CTRL2_COMBMODE_CS0_CS1;
+ else if (comb_mask == BIT(3))
+ reg_def->def |= SX9310_REG_PROX_CTRL2_COMBMODE_CS3;
+
+ break;
+ case SX9310_REG_PROX_CTRL4:
+ ret = of_property_read_string(np, "semtech,resolution", &res);
+ if (ret)
+ break;
+
+ reg_def->def &= ~SX9310_REG_PROX_CTRL4_RESOLUTION_MASK;
+ if (!strcmp(res, "coarsest"))
+ reg_def->def |= SX9310_REG_PROX_CTRL4_RESOLUTION_COARSEST;
+ else if (!strcmp(res, "very-coarse"))
+ reg_def->def |= SX9310_REG_PROX_CTRL4_RESOLUTION_VERY_COARSE;
+ else if (!strcmp(res, "coarse"))
+ reg_def->def |= SX9310_REG_PROX_CTRL4_RESOLUTION_COARSE;
+ else if (!strcmp(res, "medium-coarse"))
+ reg_def->def |= SX9310_REG_PROX_CTRL4_RESOLUTION_MEDIUM_COARSE;
+ else if (!strcmp(res, "medium"))
+ reg_def->def |= SX9310_REG_PROX_CTRL4_RESOLUTION_MEDIUM;
+ else if (!strcmp(res, "fine"))
+ reg_def->def |= SX9310_REG_PROX_CTRL4_RESOLUTION_FINE;
+ else if (!strcmp(res, "very-fine"))
+ reg_def->def |= SX9310_REG_PROX_CTRL4_RESOLUTION_VERY_FINE;
+ else if (!strcmp(res, "finest"))
+ reg_def->def |= SX9310_REG_PROX_CTRL4_RESOLUTION_FINEST;
+
+ break;
+ case SX9310_REG_PROX_CTRL5:
+ ret = of_property_read_u32(np, "semtech,startup-sensor", &start);
+ if (ret) {
+ start = FIELD_GET(SX9310_REG_PROX_CTRL5_STARTUPSENS_MASK,
+ reg_def->def);
+ }
+
+ reg_def->def &= ~SX9310_REG_PROX_CTRL5_STARTUPSENS_MASK;
+ reg_def->def |= FIELD_PREP(SX9310_REG_PROX_CTRL5_STARTUPSENS_MASK,
+ start);
+
+ ret = of_property_read_u32(np, "semtech,proxraw-strength", &raw);
+ if (ret) {
+ raw = FIELD_GET(SX9310_REG_PROX_CTRL5_RAWFILT_MASK,
+ reg_def->def);
+ } else {
+ raw = ilog2(raw);
+ }
+
+ reg_def->def &= ~SX9310_REG_PROX_CTRL5_RAWFILT_MASK;
+ reg_def->def |= FIELD_PREP(SX9310_REG_PROX_CTRL5_RAWFILT_MASK,
+ raw);
+ break;
+ case SX9310_REG_PROX_CTRL7:
+ ret = of_property_read_u32(np, "semtech,avg-pos-strength", &pos);
+ if (ret)
+ break;
+
+ if (pos > 1024)
+ pos = 0x7;
+ else if (pos == 1024)
+ pos = 0x6;
+ else if (pos == 512)
+ pos = 0x5;
+ else if (pos == 256)
+ pos = 0x4;
+ else if (pos == 128)
+ pos = 0x3;
+ else if (pos == 64)
+ pos = 0x2;
+ else if (pos == 16)
+ pos = 0x1;
+ else
+ pos = 0x0;
+
+ reg_def->def &= ~SX9310_REG_PROX_CTRL7_AVGPOSFILT_MASK;
+ reg_def->def |= FIELD_PREP(SX9310_REG_PROX_CTRL7_AVGPOSFILT_MASK,
+ pos);
+ break;
+ }
+
+ return reg_def;
+}
+
static int sx9310_init_device(struct iio_dev *indio_dev)
{
struct sx9310_data *data = iio_priv(indio_dev);
+ struct sx9310_reg_default tmp;
const struct sx9310_reg_default *initval;
int ret;
unsigned int i, val;
@@ -1213,7 +1352,7 @@ static int sx9310_init_device(struct iio_dev *indio_dev)
/* Program some sane defaults. */
for (i = 0; i < ARRAY_SIZE(sx9310_default_regs); i++) {
- initval = &sx9310_default_regs[i];
+ initval = sx9310_get_default_reg(data, i, &tmp);
ret = regmap_write(data->regmap, initval->reg, initval->def);
if (ret)
return ret;
--
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