On Wed, 2014-12-17 at 17:59 -0800, Jonathan Richardson wrote:
> Add initial version of the Broadcom touchscreen driver.
trivia:
> diff --git a/drivers/input/touchscreen/bcm_iproc_tsc.c
> b/drivers/input/touchscreen/bcm_iproc_tsc.c
> +/* Bit values for REGCTL2 */
> +#define TS_CONTROLLER_EN_BIT (1 << 16)
> +#define TS_CONTROLLER_AVGDATA_SHIFT 8
> +#define TS_CONTROLLER_AVGDATA_MASK (0x7 << TS_CONTROLLER_AVGDATA_SHIFT)
> +#define TS_CONTROLLER_PWR_LDO (1<<5)
> +#define TS_CONTROLLER_PWR_ADC (1<<4)
> +#define TS_CONTROLLER_PWR_BGP (1<<3)
> +#define TS_CONTROLLER_PWR_TS (1<<2)
> +#define TS_WIRE_MODE_BIT (1<<1)
Be nicer to use the same spacing around <<
or maybe use the BIT macro.
[]
> +static int get_tsc_config(struct device_node *np, struct iproc_ts_priv *priv)
> +{
> + int ret;
> + u32 val;
> + struct device *dev = &priv->pdev->dev;
> +
> + priv->cfg_params = default_config;
> +
> + ret = of_property_read_u32(np, "scanning_period", &val);
> + if (ret >= 0) {
> + if ((1 <= val) && (val <= 256))
> + priv->cfg_params.scanning_period = val;
> + else {
> + dev_err(dev, "scanning_period must be [1-256]");
> + return -EINVAL;
> + }
ret is never used so I'd probably remove it
from all these blocks.
It's probably be nicer to invert the logic ald
remove the else.
There's a missing terminating newline too.
Something like:
if (of_property_read_u32(np, "scanning_period", &val) >= 0) {
if (val < 1 || val > 256) {
dev_err(dev, "scanning_period must be [1-256]\n");
return -EINVAL;
}
priv->cfg_params.scanning_period = val;
}
etc...
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