* [PATCH v2 1/2] cap1106: Add support for various cap11xx devices
2014-09-23 4:04 [PATCH v2 0/2] cap1106: add support for cap11xx variants Matt Ranostay
@ 2014-09-23 4:04 ` Matt Ranostay
2014-09-23 6:46 ` Daniel Mack
2014-09-23 4:04 ` [PATCH v2 2/2] cap1106: support for irq-active-high option Matt Ranostay
1 sibling, 1 reply; 5+ messages in thread
From: Matt Ranostay @ 2014-09-23 4:04 UTC (permalink / raw)
To: galak, dmitry.torokhov, zonque, linux-input, linux-kernel,
robh+dt
Cc: devicetree, Matt Ranostay
Several other variants of the cap11xx device exists with a varying
number of capacitance detection channels. Add support for creating
the channels dynamically.
Signed-off-by: Matt Ranostay <mranostay@gmail.com>
---
drivers/input/keyboard/cap1106.c | 64 +++++++++++++++++++++++++++-------------
1 file changed, 44 insertions(+), 20 deletions(-)
diff --git a/drivers/input/keyboard/cap1106.c b/drivers/input/keyboard/cap1106.c
index d70b65a..07f9e88 100644
--- a/drivers/input/keyboard/cap1106.c
+++ b/drivers/input/keyboard/cap1106.c
@@ -55,8 +55,6 @@
#define CAP1106_REG_MANUFACTURER_ID 0xfe
#define CAP1106_REG_REVISION 0xff
-#define CAP1106_NUM_CHN 6
-#define CAP1106_PRODUCT_ID 0x55
#define CAP1106_MANUFACTURER_ID 0x5d
struct cap1106_priv {
@@ -64,7 +62,25 @@ struct cap1106_priv {
struct input_dev *idev;
/* config */
- unsigned short keycodes[CAP1106_NUM_CHN];
+ u32 *keycodes;
+ unsigned int num_channels;
+};
+
+struct cap11xx_hw_model {
+ uint8_t product_id;
+ unsigned int num_channels;
+};
+
+enum {
+ CAP1106,
+ CAP1126,
+ CAP1188,
+};
+
+struct cap11xx_hw_model cap11xx_devices[] = {
+ [CAP1106] = { .product_id = 0x55, .num_channels = 6 },
+ [CAP1126] = { .product_id = 0x53, .num_channels = 6 },
+ [CAP1188] = { .product_id = 0x50, .num_channels = 8 },
};
static const struct reg_default cap1106_reg_defaults[] = {
@@ -151,7 +167,7 @@ static irqreturn_t cap1106_thread_func(int irq_num, void *data)
if (ret < 0)
goto out;
- for (i = 0; i < CAP1106_NUM_CHN; i++)
+ for (i = 0; i < priv->num_channels; i++)
input_report_key(priv->idev, priv->keycodes[i],
status & (1 << i));
@@ -188,14 +204,23 @@ static int cap1106_i2c_probe(struct i2c_client *i2c_client,
struct device *dev = &i2c_client->dev;
struct cap1106_priv *priv;
struct device_node *node;
+ struct cap11xx_hw_model *cap = &cap11xx_devices[id->driver_data];
int i, error, irq, gain = 0;
unsigned int val, rev;
- u32 gain32, keycodes[CAP1106_NUM_CHN];
+ u32 gain32;
priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
if (!priv)
return -ENOMEM;
+ BUG_ON(!cap->num_channels);
+
+ priv->num_channels = cap->num_channels;
+ priv->keycodes = devm_kcalloc(dev,
+ priv->num_channels, sizeof(u32), GFP_KERNEL);
+ if (!priv->keycodes)
+ return -ENOMEM;
+
priv->regmap = devm_regmap_init_i2c(i2c_client, &cap1106_regmap_config);
if (IS_ERR(priv->regmap))
return PTR_ERR(priv->regmap);
@@ -204,9 +229,9 @@ static int cap1106_i2c_probe(struct i2c_client *i2c_client,
if (error)
return error;
- if (val != CAP1106_PRODUCT_ID) {
+ if (val != cap->product_id) {
dev_err(dev, "Product ID: Got 0x%02x, expected 0x%02x\n",
- val, CAP1106_PRODUCT_ID);
+ val, cap->product_id);
return -ENODEV;
}
@@ -235,17 +260,12 @@ static int cap1106_i2c_probe(struct i2c_client *i2c_client,
dev_err(dev, "Invalid sensor-gain value %d\n", gain32);
}
- BUILD_BUG_ON(ARRAY_SIZE(keycodes) != ARRAY_SIZE(priv->keycodes));
-
/* Provide some useful defaults */
- for (i = 0; i < ARRAY_SIZE(keycodes); i++)
- keycodes[i] = KEY_A + i;
+ for (i = 0; i < priv->num_channels; i++)
+ priv->keycodes[i] = KEY_A + i;
of_property_read_u32_array(node, "linux,keycodes",
- keycodes, ARRAY_SIZE(keycodes));
-
- for (i = 0; i < ARRAY_SIZE(keycodes); i++)
- priv->keycodes[i] = keycodes[i];
+ priv->keycodes, priv->num_channels);
error = regmap_update_bits(priv->regmap, CAP1106_REG_MAIN_CONTROL,
CAP1106_REG_MAIN_CONTROL_GAIN_MASK,
@@ -269,17 +289,17 @@ static int cap1106_i2c_probe(struct i2c_client *i2c_client,
if (of_property_read_bool(node, "autorepeat"))
__set_bit(EV_REP, priv->idev->evbit);
- for (i = 0; i < CAP1106_NUM_CHN; i++)
+ for (i = 0; i < priv->num_channels; i++)
__set_bit(priv->keycodes[i], priv->idev->keybit);
__clear_bit(KEY_RESERVED, priv->idev->keybit);
priv->idev->keycode = priv->keycodes;
- priv->idev->keycodesize = sizeof(priv->keycodes[0]);
- priv->idev->keycodemax = ARRAY_SIZE(priv->keycodes);
+ priv->idev->keycodesize = sizeof(u32);
+ priv->idev->keycodemax = priv->num_channels;
priv->idev->id.vendor = CAP1106_MANUFACTURER_ID;
- priv->idev->id.product = CAP1106_PRODUCT_ID;
+ priv->idev->id.product = cap->product_id;
priv->idev->id.version = rev;
priv->idev->open = cap1106_input_open;
@@ -313,12 +333,16 @@ static int cap1106_i2c_probe(struct i2c_client *i2c_client,
static const struct of_device_id cap1106_dt_ids[] = {
{ .compatible = "microchip,cap1106", },
+ { .compatible = "microchip,cap1126", },
+ { .compatible = "microchip,cap1188", },
{}
};
MODULE_DEVICE_TABLE(of, cap1106_dt_ids);
static const struct i2c_device_id cap1106_i2c_ids[] = {
- { "cap1106", 0 },
+ { "cap1106", CAP1106 },
+ { "cap1126", CAP1126 },
+ { "cap1188", CAP1188 },
{}
};
MODULE_DEVICE_TABLE(i2c, cap1106_i2c_ids);
--
1.9.1
^ permalink raw reply related [flat|nested] 5+ messages in thread* [PATCH v2 2/2] cap1106: support for irq-active-high option
2014-09-23 4:04 [PATCH v2 0/2] cap1106: add support for cap11xx variants Matt Ranostay
2014-09-23 4:04 ` [PATCH v2 1/2] cap1106: Add support for various cap11xx devices Matt Ranostay
@ 2014-09-23 4:04 ` Matt Ranostay
1 sibling, 0 replies; 5+ messages in thread
From: Matt Ranostay @ 2014-09-23 4:04 UTC (permalink / raw)
To: galak, dmitry.torokhov, zonque, linux-input, linux-kernel,
robh+dt
Cc: devicetree, Matt Ranostay
Some applications need to use the irq-active-high push-pull option.
This allows it be enabled in the device tree child node.
Signed-off-by: Matt Ranostay <mranostay@gmail.com>
---
Documentation/devicetree/bindings/input/cap1106.txt | 4 ++++
drivers/input/keyboard/cap1106.c | 8 ++++++++
2 files changed, 12 insertions(+)
diff --git a/Documentation/devicetree/bindings/input/cap1106.txt b/Documentation/devicetree/bindings/input/cap1106.txt
index 4b46390..6f5a143 100644
--- a/Documentation/devicetree/bindings/input/cap1106.txt
+++ b/Documentation/devicetree/bindings/input/cap1106.txt
@@ -26,6 +26,10 @@ Optional properties:
Valid values are 1, 2, 4, and 8.
By default, a gain of 1 is set.
+ microchip,irq-active-high: By default the interrupt pin is active low
+ open drain. This property allows using the active
+ high push-pull output.
+
linux,keycodes: Specifies an array of numeric keycode values to
be used for the channels. If this property is
omitted, KEY_A, KEY_B, etc are used as
diff --git a/drivers/input/keyboard/cap1106.c b/drivers/input/keyboard/cap1106.c
index 07f9e88..d5ce060 100644
--- a/drivers/input/keyboard/cap1106.c
+++ b/drivers/input/keyboard/cap1106.c
@@ -47,6 +47,7 @@
#define CAP1106_REG_STANDBY_SENSITIVITY 0x42
#define CAP1106_REG_STANDBY_THRESH 0x43
#define CAP1106_REG_CONFIG2 0x44
+#define CAP1106_REG_CONFIG2_ALT_POL BIT(6)
#define CAP1106_REG_SENSOR_BASE_CNT(X) (0x50 + (X))
#define CAP1106_REG_SENSOR_CALIB (0xb1 + (X))
#define CAP1106_REG_SENSOR_CALIB_LSB1 0xb9
@@ -260,6 +261,13 @@ static int cap1106_i2c_probe(struct i2c_client *i2c_client,
dev_err(dev, "Invalid sensor-gain value %d\n", gain32);
}
+ if (of_property_read_bool(node, "microchip,irq-active-high")) {
+ error = regmap_update_bits(priv->regmap, CAP1106_REG_CONFIG2,
+ CAP1106_REG_CONFIG2_ALT_POL, 0);
+ if (error)
+ return error;
+ }
+
/* Provide some useful defaults */
for (i = 0; i < priv->num_channels; i++)
priv->keycodes[i] = KEY_A + i;
--
1.9.1
^ permalink raw reply related [flat|nested] 5+ messages in thread