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Date: Mon, 29 Sep 2014 21:26:28 -0700
From: Matt Ranostay <mranostay@...il.com>
To: galak@...eaurora.org, dmitry.torokhov@...il.com, zonque@...il.com,
linux-input@...r.kernel.org, linux-kernel@...r.kernel.org,
robh+dt@...nel.org
Cc: devicetree@...r.kernel.org, Matt Ranostay <mranostay@...il.com>
Subject: [PATCH v4 2/3] cap11xx: Add support for various cap11xx devices
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@...il.com>
---
.../devicetree/bindings/input/cap11xx.txt | 3 +-
drivers/input/keyboard/cap11xx.c | 65 +++++++++++++++-------
2 files changed, 46 insertions(+), 22 deletions(-)
diff --git a/Documentation/devicetree/bindings/input/cap11xx.txt b/Documentation/devicetree/bindings/input/cap11xx.txt
index 738f5f3..8031aa5 100644
--- a/Documentation/devicetree/bindings/input/cap11xx.txt
+++ b/Documentation/devicetree/bindings/input/cap11xx.txt
@@ -7,9 +7,10 @@ Required properties:
compatible: Must be on the following, depending on the model:
"microchip,cap1106"
+ "microchip,cap1126"
+ "microchip,cap1188"
reg: The I2C slave address of the device.
- Only 0x28 is valid.
interrupts: Property describing the interrupt line the
device's ALERT#/CM_IRQ# pin is connected to.
diff --git a/drivers/input/keyboard/cap11xx.c b/drivers/input/keyboard/cap11xx.c
index 0da2e83..adb979e 100644
--- a/drivers/input/keyboard/cap11xx.c
+++ b/drivers/input/keyboard/cap11xx.c
@@ -1,7 +1,6 @@
/*
* Input driver for Microchip CAP11xx based capacitive touch sensors
*
- *
* (c) 2014 Daniel Mack <linux@...que.org>
*
* This program is free software; you can redistribute it and/or modify
@@ -54,8 +53,6 @@
#define CAP11XX_REG_MANUFACTURER_ID 0xfe
#define CAP11XX_REG_REVISION 0xff
-#define CAP11XX_NUM_CHN 6
-#define CAP11XX_PRODUCT_ID 0x55
#define CAP11XX_MANUFACTURER_ID 0x5d
struct cap11xx_priv {
@@ -63,7 +60,25 @@ struct cap11xx_priv {
struct input_dev *idev;
/* config */
- unsigned short keycodes[CAP11XX_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 cap11xx_reg_defaults[] = {
@@ -150,7 +165,7 @@ static irqreturn_t cap11xx_thread_func(int irq_num, void *data)
if (ret < 0)
goto out;
- for (i = 0; i < CAP11XX_NUM_CHN; i++)
+ for (i = 0; i < priv->num_channels; i++)
input_report_key(priv->idev, priv->keycodes[i],
status & (1 << i));
@@ -187,14 +202,23 @@ static int cap11xx_i2c_probe(struct i2c_client *i2c_client,
struct device *dev = &i2c_client->dev;
struct cap11xx_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[CAP11XX_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, &cap11xx_regmap_config);
if (IS_ERR(priv->regmap))
return PTR_ERR(priv->regmap);
@@ -203,9 +227,9 @@ static int cap11xx_i2c_probe(struct i2c_client *i2c_client,
if (error)
return error;
- if (val != CAP11XX_PRODUCT_ID) {
+ if (val != cap->product_id) {
dev_err(dev, "Product ID: Got 0x%02x, expected 0x%02x\n",
- val, CAP11XX_PRODUCT_ID);
+ val, cap->product_id);
return -ENODEV;
}
@@ -234,17 +258,12 @@ static int cap11xx_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, CAP11XX_REG_MAIN_CONTROL,
CAP11XX_REG_MAIN_CONTROL_GAIN_MASK,
@@ -268,17 +287,17 @@ static int cap11xx_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 < CAP11XX_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 = CAP11XX_MANUFACTURER_ID;
- priv->idev->id.product = CAP11XX_PRODUCT_ID;
+ priv->idev->id.product = cap->product_id;
priv->idev->id.version = rev;
priv->idev->open = cap11xx_input_open;
@@ -312,12 +331,16 @@ static int cap11xx_i2c_probe(struct i2c_client *i2c_client,
static const struct of_device_id cap11xx_dt_ids[] = {
{ .compatible = "microchip,cap1106", },
+ { .compatible = "microchip,cap1126", },
+ { .compatible = "microchip,cap1188", },
{}
};
MODULE_DEVICE_TABLE(of, cap11xx_dt_ids);
static const struct i2c_device_id cap11xx_i2c_ids[] = {
- { "cap1106", 0 },
+ { "cap1106", CAP1106 },
+ { "cap1126", CAP1126 },
+ { "cap1188", CAP1188 },
{}
};
MODULE_DEVICE_TABLE(i2c, cap11xx_i2c_ids);
--
1.9.1
--
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