Hi,
On 09/21/2014 05:01 AM, Matt Ranostay wrote:
> Several other variants of the cap11xx device exists with a varying
> number of capacitance detection channels. Add support for creating
> the channels dynamically.
Thanks for the patches!
>
> Signed-off-by: Matt Ranostay <mranos...@gmail.com>
> ---
> drivers/input/keyboard/cap1106.c | 54
> +++++++++++++++++++---------------------
Please also add a patch to rename the file to cap11xx.c, and make sure
to export the patch with 'git format-patch -M' to detect the rename.
> diff --git a/drivers/input/keyboard/cap1106.c
> b/drivers/input/keyboard/cap1106.c
> index d70b65a..b9c43b5 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 +62,8 @@ struct cap1106_priv {
> struct input_dev *idev;
>
> /* config */
> - unsigned short keycodes[CAP1106_NUM_CHN];
> + u32 *keycodes;
unsigned short *, please. See below.
> @@ -189,27 +188,23 @@ static int cap1106_i2c_probe(struct i2c_client
> *i2c_client,
> struct cap1106_priv *priv;
> struct device_node *node;
> int i, error, irq, gain = 0;
> - unsigned int val, rev;
> - u32 gain32, keycodes[CAP1106_NUM_CHN];
> + unsigned int val, prod, rev;
> + u32 gain32;
>
> priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
> if (!priv)
> return -ENOMEM;
>
> + priv->num_channels = (unsigned long) id->driver_data;
priv->num_channels is unsigned int.
Also, a BUG_ON(!priv->num_channels) wouldn't harm.
> + priv->keycodes = devm_kzalloc(dev,
> + sizeof(u32) * priv->num_channels, GFP_KERNEL);
Use devm_kcalloc() to allocate an array.
> @@ -235,17 +234,12 @@ 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);
Hmm, no. Internally, you have to store the keycodes as unsigned short,
otherwise EVIOC{G|S}KEYCODE from usespace doesn't work.
of_property_read_u16_array() should work here for unsigned short, I
guess. Otherwise, you'd have to open-code the routine.
> @@ -313,12 +307,16 @@ 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", },
Hmm, how can that work unless you set .data to the number of channels
here? Did you test that with a DT-enabled board?
Thanks,
Daniel
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