On Tuesday 28 November 2017 11:57 PM, Strashko, Grygorii wrote:
>
>
> On 11/15/2017 10:23 PM, Keerthy wrote:
>> Adapt driver to utilize dmtimer pdata ops instead of pdata-quirks.
>>
>> Signed-off-by: Keerthy <j-keerthy@xxxxxx>
>> ---
>>
>> Changes in v3:
>>
>> * Used of_find_platdata_by_node function to fetch platform
>> data for timer node.
>>
>> drivers/pwm/pwm-omap-dmtimer.c | 39 ++++++++++++++++++++++-----------------
>> 1 file changed, 22 insertions(+), 17 deletions(-)
>>
>> diff --git a/drivers/pwm/pwm-omap-dmtimer.c b/drivers/pwm/pwm-omap-dmtimer.c
>> index 5ad42f3..2caf46b 100644
>> --- a/drivers/pwm/pwm-omap-dmtimer.c
>> +++ b/drivers/pwm/pwm-omap-dmtimer.c
>> @@ -23,6 +23,7 @@
>> #include <linux/mutex.h>
>> #include <linux/of.h>
>> #include <linux/of_platform.h>
>> +#include <linux/platform_data/dmtimer-omap.h>
>> #include <linux/platform_data/pwm_omap_dmtimer.h>
>> #include <linux/platform_device.h>
>> #include <linux/pm_runtime.h>
>> @@ -37,7 +38,7 @@ struct pwm_omap_dmtimer_chip {
>> struct pwm_chip chip;
>> struct mutex mutex;
>> pwm_omap_dmtimer *dm_timer;
>> - struct pwm_omap_dmtimer_pdata *pdata;
>> + struct omap_dm_timer_ops *pdata;
>> struct platform_device *dm_timer_pdev;
>> };
>>
>> @@ -242,19 +243,33 @@ static int pwm_omap_dmtimer_probe(struct platform_device *pdev)
>> {
>> struct device_node *np = pdev->dev.of_node;
>> struct device_node *timer;
>> + struct platform_device *timer_pdev;
>> struct pwm_omap_dmtimer_chip *omap;
>> - struct pwm_omap_dmtimer_pdata *pdata;
>> + struct dmtimer_platform_data *timer_pdata;
>> + struct omap_dm_timer_ops *pdata;
>> pwm_omap_dmtimer *dm_timer;
>> u32 v;
>> int status;
>>
>> - pdata = dev_get_platdata(&pdev->dev);
>> - if (!pdata) {
>> - dev_err(&pdev->dev, "Missing dmtimer platform data\n");
>> + timer = of_parse_phandle(np, "ti,timers", 0);
>> + if (!timer)
>> + return -ENODEV;
>> +
>> + timer_pdev = of_find_device_by_node(timer);
>> + if (!timer_pdev) {
>> + dev_err(&pdev->dev, "Unable to find Timer pdev\n");
>> + return -ENODEV;
>> + }
>> +
>> + timer_pdata = of_find_platdata_by_node(timer);
>> + if (!timer_pdata) {
>> + dev_err(&pdev->dev, "dmtimer pdata structure NULL\n");
>> return -EINVAL;
>> }
>
> Huh. I think It might be better if you add smth. like
>
> struct omap_dm_timer *dm_timer = of_omap_dm_timer_get(parent_np, "ti,timers", idx);
>
> struct omap_dm_timer_ops *pdata = omap_dm_timer_get_ops(dm_timer);
>
> so all DT and platdata implementation details will be hidden.
Grygorii,
This driver is already fetching:
omap->dm_timer_pdev = of_find_device_by_node(timer);
It stores dm_timer_pdev in struct pwm_omap_dmtimer_chip.
So we already need:
timer = of_parse_phandle(np, "ti,timers", 0);
and
omap->dm_timer_pdev = of_find_device_by_node(timer);
So why not just do:
struct omap_dm_timer_ops *pdata =
omap_dm_timer_get_ops(omap->dm_timer_pdev);
Regards,
Keerthy
>
>
>>
>> - if (!pdata->request_by_node ||
>> + pdata = timer_pdata->timer_ops;
>> +
>> + if (!pdata || !pdata->request_by_node ||
>> !pdata->free ||
>> !pdata->enable ||
>> !pdata->disable ||
>> @@ -270,10 +285,6 @@ static int pwm_omap_dmtimer_probe(struct platform_device *pdev)
>> return -EINVAL;
>> }
>>
>> - timer = of_parse_phandle(np, "ti,timers", 0);
>> - if (!timer)
>> - return -ENODEV;
>> -
>> if (!of_get_property(timer, "ti,timer-pwm", NULL)) {
>> dev_err(&pdev->dev, "Missing ti,timer-pwm capability\n");
>> return -ENODEV;
>> @@ -291,13 +302,7 @@ static int pwm_omap_dmtimer_probe(struct platform_device *pdev)
>>
>> omap->pdata = pdata;
>> omap->dm_timer = dm_timer;
>> -
>> - omap->dm_timer_pdev = of_find_device_by_node(timer);
>> - if (!omap->dm_timer_pdev) {
>> - dev_err(&pdev->dev, "Unable to find timer pdev\n");
>> - omap->pdata->free(dm_timer);
>> - return -EINVAL;
>> - }
>> + omap->dm_timer_pdev = timer_pdev;
Here we need timer_pdev anyways.
>>
>> /*
>> * Ensure that the timer is stopped before we allow PWM core to call
>>
>
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