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Date: Thu, 9 Oct 2014 20:54:07 -0700
From: Matt Ranostay <mranostay@...il.com>
To: Dmitry Torokhov <dmitry.torokhov@...il.com>
Cc: Kumar Gala <galak@...eaurora.org>, Daniel Mack <zonque@...il.com>,
linux-input@...r.kernel.org,
"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
Rob Herring <robh+dt@...nel.org>,
"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>
Subject: Re: [PATCH v4 2/3] cap11xx: Add support for various cap11xx devices
Oh good catch! Will resubmitted with v5.
On Tue, Oct 7, 2014 at 5:09 PM, Dmitry Torokhov
<dmitry.torokhov@...il.com> wrote:
> Hi Matt,
>
> On Mon, Sep 29, 2014 at 09:26:28PM -0700, Matt Ranostay wrote:
>> + priv->num_channels = cap->num_channels;
>> + priv->keycodes = devm_kcalloc(dev,
>> + priv->num_channels, sizeof(u32), GFP_KERNEL);
>> + if (!priv->keycodes)
>> + return -ENOMEM;
>
> Instead of allocating keymap separately can we do something like below?
>
> Thanks.
>
> --
> Dmitry
>
>
> Input: cap11xx - add support for various cap11xx devices
>
> From: Matt Ranostay <mranostay@...il.com>
>
> 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>
> Reviewed-by: Daniel Mack <daniel@...que.org>
> Signed-off-by: Dmitry Torokhov <dmitry.torokhov@...il.com>
> ---
> .../devicetree/bindings/input/cap11xx.txt | 3 +
> drivers/input/keyboard/cap11xx.c | 62 +++++++++++++-------
> 2 files changed, 42 insertions(+), 23 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..87fa209 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 +60,24 @@ struct cap11xx_priv {
> struct input_dev *idev;
>
> /* config */
> - unsigned short keycodes[CAP11XX_NUM_CHN];
> + u32 keycodes[];
> +};
> +
> +struct cap11xx_hw_model {
> + uint8_t product_id;
> + unsigned int num_channels;
> +};
> +
> +enum {
> + CAP1106,
> + CAP1126,
> + CAP1188,
> +};
> +
> +static const 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 +164,7 @@ 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->idev->keycodemax; i++)
> input_report_key(priv->idev, priv->keycodes[i],
> status & (1 << i));
>
> @@ -187,11 +201,16 @@ static int cap11xx_i2c_probe(struct i2c_client *i2c_client,
> struct device *dev = &i2c_client->dev;
> struct cap11xx_priv *priv;
> struct device_node *node;
> + const 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;
> +
> + BUG_ON(!cap->num_channels);
>
> - priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
> + priv = devm_kzalloc(dev,
> + sizeof(*priv) + cap->num_channels * sizeof(u32),
> + GFP_KERNEL);
> if (!priv)
> return -ENOMEM;
>
> @@ -203,9 +222,9 @@ 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;
> }
>
> @@ -225,8 +244,8 @@ static int cap11xx_i2c_probe(struct i2c_client *i2c_client,
>
> dev_info(dev, "CAP11XX detected, revision 0x%02x\n", rev);
> i2c_set_clientdata(i2c_client, priv);
> - node = dev->of_node;
>
> + node = dev->of_node;
> if (!of_property_read_u32(node, "microchip,sensor-gain", &gain32)) {
> if (is_power_of_2(gain32) && gain32 <= 8)
> gain = ilog2(gain32);
> @@ -234,17 +253,12 @@ 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 < cap->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, cap->num_channels);
>
> error = regmap_update_bits(priv->regmap, CAP11XX_REG_MAIN_CONTROL,
> CAP11XX_REG_MAIN_CONTROL_GAIN_MASK,
> @@ -268,17 +282,17 @@ 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 < cap->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->keycodemax = cap->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 +326,16 @@ 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);
--
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