Re: [PATCH v14 04/12] OMAP2+: dmtimer: convert to platform devices

[Todd Poynor <toddpoynor@google.com>]

On Mon, Jul 11, 2011 at 04:59:11PM +0530, Tarun Kanti DebBarma wrote:
> Add routines to converts dmtimers to platform devices. The device data
> is obtained from hwmod database of respective platform and is registered
> to device model after successful binding to driver.
> In addition, capability attribute of each of the timers is added in
> hwmod database.
> 
...
> +static int omap2_dm_timer_set_src(struct platform_device *pdev, int source)
> +{
> +	int ret;
> +	struct dmtimer_platform_data *pdata = pdev->dev.platform_data;
> +	struct clk *fclk, *parent;
> +	char *parent_name = NULL;
> +
> +	fclk = clk_get(&pdev->dev, "fck");
> +	if (IS_ERR_OR_NULL(fclk)) {
> +		dev_err(&pdev->dev, "%s: %d: clk_get() FAILED\n",
> +				__func__, __LINE__);
> +		return -EINVAL;
> +	}
> +
> +	switch (source) {
> +	case OMAP_TIMER_SRC_SYS_CLK:
> +		parent_name = "sys_ck";
> +		break;
> +
> +	case OMAP_TIMER_SRC_32_KHZ:
> +		parent_name = "32k_ck";
> +		break;
> +
> +	case OMAP_TIMER_SRC_EXT_CLK:
> +		if (pdata->timer_ip_type == OMAP_TIMER_IP_VERSION_1) {
> +			parent_name = "alt_ck";
> +			break;
> +		}
> +		dev_err(&pdev->dev, "%s: %d: invalid clk src.\n",
> +			__func__, __LINE__);
> +		return -EINVAL;

Should clk_put(fclk);

...
> +	pdata = kzalloc(sizeof(*pdata), GFP_KERNEL);
> +	if (!pdata) {
> +		pr_err("%s: No memory for [%s]\n", __func__, oh->name);
> +		return -ENOMEM;
> +	}
> +
> +	/*
> +	 * Extract the IDs from name field in hwmod database
> +	 * and use the same for constructing ids' for the
> +	 * timer devices. In a way, we are avoiding usage of
> +	 * static variable witin the function to do the same.
> +	 * CAUTION: We have to be careful and make sure the
> +	 * name in hwmod database does not change in which case
> +	 * we might either make corresponding change here or
> +	 * switch back static variable mechanism.
> +	 */
> +	sscanf(oh->name, "timer%2d", &id);
> +
> +	pdata->set_timer_src = omap2_dm_timer_set_src;
> +	pdata->timer_ip_type = oh->class->rev;
> +	pdata->needs_manual_reset = 0;

Can omit init to zero of kzalloc'ed mem.


Todd