On 01/18/2013 04:59 PM, Russell King - ARM Linux wrote:
> On Fri, Jan 18, 2013 at 02:17:08PM +0200, Roger Quadros wrote:
>> + tll->ch_clk = devm_kzalloc(dev, sizeof(struct clk * [tll->nch]),
>> + GFP_KERNEL);
>> + if (!tll->ch_clk) {
>> + ret = -ENOMEM;
>> + dev_err(dev, "Couldn't allocate memory for channel clocks\n");
>> + goto err_clk_alloc;
>> + }
>> +
>> + for (i = 0; i < tll->nch; i++) {
>> + char clkname[] = "usb_tll_hs_usb_chx_clk";
>> + struct clk *fck;
>> +
>> + snprintf(clkname, sizeof(clkname),
>> + "usb_tll_hs_usb_ch%d_clk", i);
>> + fck = clk_get(dev, clkname);
>> +
>> + if (IS_ERR(fck))
>> + dev_dbg(dev, "can't get clock : %s\n", clkname);
>> + else
>> + tll->ch_clk[i] = fck;
>
> Hmm. I'd actually suggest that this becomes:
>
> tll->ch_clk[i] = fck;
> if (IS_ERR(fck)
> dev_dbg(dev, "can't get clock: %s\n", clkname);
>
> so that tll->ch_clk is always written to.
Yes, I'll fix this.
>
>> static int usbtll_omap_remove(struct platform_device *pdev)
>> {
>> struct usbtll_omap *tll = platform_get_drvdata(pdev);
>> + int i;
>> +
>> + for (i = 0; i < tll->nch; i++)
>> + clk_put(tll->ch_clk[i]);
>
> And change this to:
>
> for (i = 0; i < tll->nch; i++)
> if (!IS_ERR(tll->ch_clk[i]))
> clk_put(tll->ch_clk[i]);
>
> so that you're not passing a NULL pointer in.
>
ok.
>> + for (i = 0; i < tll->nch; i++) {
>> + if (is_ehci_tll_mode(pdata->port_mode[i])) {
>> + int r;
>>
>> - if (is_ehci_tll_mode(pdata->port_mode[1]))
>> - clk_enable(tll->usbtll_p2_fck);
>> + if (!tll->ch_clk[i])
>
> if (IS_ERR(tll->ch_clk[i]))
ok.
>
>> + continue;
>> +
>> + r = clk_enable(tll->ch_clk[i]);
>> + if (r) {
>> + dev_err(dev,
>> + "Error enabling ch %d clock: %d\n", i, r);
>> + }
>> + }
>> + }
>
>> @@ -387,11 +409,12 @@ static int usbtll_runtime_suspend(struct device *dev)
>>
>> spin_lock_irqsave(&tll->lock, flags);
>>
>> - if (is_ehci_tll_mode(pdata->port_mode[0]))
>> - clk_disable(tll->usbtll_p1_fck);
>> -
>> - if (is_ehci_tll_mode(pdata->port_mode[1]))
>> - clk_disable(tll->usbtll_p2_fck);
>> + for (i = 0; i < tll->nch; i++) {
>> + if (is_ehci_tll_mode(pdata->port_mode[i])) {
>> + if (tll->ch_clk[i])
>
> if (!IS_ERR(tll->ch_clk[i]))
ok.
>
>> + clk_disable(tll->ch_clk[i]);
>> + }
>> + }
>>
>> spin_unlock_irqrestore(&tll->lock, flags);
>>
--
cheers,
-roger
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