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SubjectRe: [PATCH v5 5/7] gpio: davinci: add OF support
On 11/11/2013 05:37 PM, Prabhakar Lad wrote:
> Hi Grygorii,
>
> Thanks for the review.
>
> On Mon, Nov 11, 2013 at 8:48 PM, Grygorii Strashko
> <grygorii.strashko@ti.com> wrote:
>> On 11/08/2013 12:11 PM, Prabhakar Lad wrote:
> [Snip]
>>> @@ -134,6 +137,40 @@ davinci_gpio_set(struct gpio_chip *chip, unsigned offset, int value)
>>> writel((1 << offset), value ? &g->set_data : &g->clr_data);
>>> }
>>>
>>> +static struct davinci_gpio_platform_data *
>>> +davinci_gpio_get_pdata(struct platform_device *pdev)
>>
>> Minor: usually such functions have "_of" in their names:
>> davinci_gpio_of_get_pdata()
>>
> Ahh but actual this function is intended to get pdata in both the
> cases DT and NON-DT, so kept it generic :)

np

>
>>> +{
>>> + struct device_node *dn = pdev->dev.of_node;
>>> + struct davinci_gpio_platform_data *pdata;
>>> + int ret;
>>> + u32 val;
>>> +
>>> + if (!IS_ENABLED(CONFIG_OF) || !pdev->dev.of_node)
>>> + return pdev->dev.platform_data;
>>> +
>>> + pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL);
>>> + if (!pdata)
>>> + return NULL;
>>> +
>>> + ret = of_property_read_u32(dn, "ti,ngpio", &val);
>>> + if (ret)
>>> + goto of_err;
>>> +
>>> + pdata->ngpio = val;
>>> +
>>> + ret = of_property_read_u32(dn, "ti,davinci-gpio-unbanked", &val);
>>> + if (ret)
>>> + goto of_err;
>>> +
>>> + pdata->gpio_unbanked = val;
>>> +
>>> + return pdata;
>>> +
>>> +of_err:
>>> + dev_err(&pdev->dev, "Populating pdata from DT failed: err %d\n", ret);
>>> + return NULL;
>>> +}
>>> +
>>> static int davinci_gpio_probe(struct platform_device *pdev)
>>> {
>>> int i, base;
>>> @@ -144,12 +181,14 @@ static int davinci_gpio_probe(struct platform_device *pdev)
>>> struct device *dev = &pdev->dev;
>>> struct resource *res;
>>>
>>> - pdata = dev->platform_data;
>>> + pdata = davinci_gpio_get_pdata(pdev);
>>> if (!pdata) {
>>> dev_err(dev, "No platform data found\n");
>>> return -EINVAL;
>>> }
>>>
>>> + dev->platform_data = pdata;
>>> +
>>
>> Pls, add following code to GPIO chip initialization:
>>
>> @@ -233,6 +245,9 @@ static int davinci_gpio_probe(struct platform_device *pdev)
>> chips[i].chip.ngpio = ngpio - base;
>> if (chips[i].chip.ngpio > 32)
>> chips[i].chip.ngpio = 32;
>> +#ifdef CONFIG_OF_GPIO
>> + chips[i].chip.of_node = dev->of_node;
>> +#endif
>>
>>
> OK
>
> Regards,
> --Prabhakar Lad
>



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