On Thu, 2015-03-12 at 10:45 -0700, Jonathan Richardson wrote:
> Add initial version of the Broadcom touchscreen driver.
style trivia:
(any of which could be fixed/improved/ignored later)
> diff --git a/drivers/input/touchscreen/bcm_iproc_tsc.c b/drivers/input/touchscreen/bcm_iproc_tsc.c
[]
> +static void ts_reg_dump(struct iproc_ts_priv *priv)
> +{
> + struct device *dev = &priv->pdev->dev;
> +
> + dev_dbg(dev, "regCtl1 = 0x%08x\n",
> + readl(priv->regs + REGCTL1));
The output case here generally isn't very important so
sometimes it's better to use a macro like:
#define dbg_reg(dev, priv, reg) \
dev_dbg(dev, "%20s= 0x%08x\n", #reg, readl((priv)->regs + reg))
> + dev_dbg(dev, "regCtl2 = 0x%08x\n",
> + readl(priv->regs + REGCTL2));
so these become
dbg_reg(dev, priv, INTERRUPT_THRES);
dbg_reg(dev, priv, INTERRUPT_MASK);
etc...
This style can reduce typo and copy/paste defects.
> + dev_dbg(dev, "interrupt_Thres = 0x%08x\n",
> + readl(priv->regs + INTERRUPT_THRES));
> + dev_dbg(dev, "interrupt_Mask = 0x%08x\n",
> + readl(priv->regs + INTERRUPT_MASK));
> + dev_dbg(dev, "interrupt_Status = 0x%08x\n",
> + readl(priv->regs + INTERRUPT_STATUS));
> + dev_dbg(dev, "controller_Status = 0x%08x\n",
> + readl(priv->regs + CONTROLLER_STATUS));
> + dev_dbg(dev, "FIFO_Data = 0x%08x\n",
> + readl(priv->regs + FIFO_DATA));
> + dev_dbg(dev, "analog_Control = 0x%08x\n",
> + readl(priv->regs + ANALOG_CONTROL));
> + dev_dbg(dev, "aux_Data = 0x%08x\n",
> + readl(priv->regs + AUX_DATA));
> + dev_dbg(dev, "debounce_Cntr_Stat = 0x%08x\n",
> + readl(priv->regs + DEBOUNCE_CNTR_STAT));
> + dev_dbg(dev, "scan_Cntr_Stat = 0x%08x\n",
> + readl(priv->regs + SCAN_CNTR_STAT));
> + dev_dbg(dev, "rem_Cntr_Stat = 0x%08x\n",
> + readl(priv->regs + REM_CNTR_STAT));
> + dev_dbg(dev, "settling_Timer_Stat = 0x%08x\n",
> + readl(priv->regs + SETTLING_TIMER_STAT));
> + dev_dbg(dev, "spare_Reg = 0x%08x\n",
> + readl(priv->regs + SPARE_REG));
> + dev_dbg(dev, "soft_Bypass_Control = 0x%08x\n",
> + readl(priv->regs + SOFT_BYPASS_CONTROL));
> + dev_dbg(dev, "soft_Bypass_Data = 0x%08x\n",
> + readl(priv->regs + SOFT_BYPASS_DATA));
> +}
[]
> +static int get_tsc_config(struct device_node *np, struct iproc_ts_priv *priv)
> +{
> + u32 val;
[]
> + if (of_property_read_u32(np, "debounce_timeout", &val) >= 0) {
> + if (val < 0 || val > 255) {
testing u32 < 0 isn't necessary.
Maybe it'd be better to emit the out of range value too
> + dev_err(dev, "debounce_timeout must be [0-255]\n");
dev_err(dev, "debounce_timeout (%u) must be [0-255]\n", val);
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