On Mon, Nov 7, 2011 at 5:35 PM, DebBarma, Tarun Kanti
<tarun.kanti@xxxxxx> wrote:
> On Fri, Nov 4, 2011 at 10:23 PM, Kevin Hilman <khilman@xxxxxx> wrote:
>> Tarun Kanti DebBarma <tarun.kanti@xxxxxx> writes:
>>
>>> From: Nishanth Menon <nm@xxxxxx>
>>>
>>> GPIO IP revisions such as those used in OMAP4 have a set_dataout
>>> while the previous revisions used a single dataout register.
>>> Depending on what is available restore the dataout settings
>>> to the right register.
>>>
>>> Signed-off-by: Nishanth Menon <nm@xxxxxx>
>>> Signed-off-by: Tarun Kanti DebBarma <tarun.kanti@xxxxxx>
>>> Reviewed-by: Santosh Shilimkar <santosh.shilimkar@xxxxxx>
>>> ---
>>> drivers/gpio/gpio-omap.c | 9 +++++++--
>>> 1 files changed, 7 insertions(+), 2 deletions(-)
>>>
>>> diff --git a/drivers/gpio/gpio-omap.c b/drivers/gpio/gpio-omap.c
>>> index 4009446..3df7a98 100644
>>> --- a/drivers/gpio/gpio-omap.c
>>> +++ b/drivers/gpio/gpio-omap.c
>>> @@ -1073,7 +1073,7 @@ static int __devinit omap_gpio_probe(struct platform_device *pdev)
>>> bank->get_context_loss_count = pdata->get_context_loss_count;
>>> bank->regs = pdata->regs;
>>>
>>> - if (bank->regs->set_dataout && bank->regs->clr_dataout)
>>> + if (bank->regs->set_dataout)
>>
>> This change isn't right.
>>
>> The _set_gpio_dataout_reg function depends on the existence of
>> ->clr_dataout too.
> Ok, I will add the clr_dataout condtion as well.
>
>>
>>> bank->set_dataout = _set_gpio_dataout_reg;
>>> else
>>> bank->set_dataout = _set_gpio_dataout_mask;
>>> @@ -1351,7 +1351,12 @@ static void omap_gpio_restore_context(struct gpio_bank *bank)
>>> bank->base + bank->regs->risingdetect);
>>> __raw_writel(bank->context.fallingdetect,
>>> bank->base + bank->regs->fallingdetect);
>>> - __raw_writel(bank->context.dataout, bank->base + bank->regs->dataout);
>>> + if (bank->regs->set_dataout)
>>
>> Why the check again? The check has already been done in probe.
>>
>> Just use bank->set_dataout() here.
> Sure, i will make the change.
When I look at the signature of set_dataout(), it does not seem straight forward
to be used here. It expects (struct gpio_bank *bank, int gpio, int enable) to be
passed to it.
set_dataout (struct gpio_bank *bank, int gpio, int enable)
{
void __iomem *reg = bank->base;
u32 l = GPIO_BIT(bank, gpio);
...
if (enable)
...
else
...
__raw_writel(l, reg);
}
--
Tarun
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