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SubjectRe: [PATCH v5 1/4] mfd: mxs-lradc: Add support for mxs-lradc MFD
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On September 27, 2016 11:50:00 AM PDT, Lee Jones <lee.jones@linaro.org> wrote:
>On Sat, 17 Sep 2016, Ksenija Stanojević wrote:
>> On Wed, Aug 31, 2016 at 2:05 PM, Lee Jones <lee.jones@linaro.org>
>wrote:
>> > On Thu, 18 Aug 2016, Ksenija Stanojevic wrote:
>> >
>> > > Add core files for mxs-lradc MFD driver.
>> > >
>> > > Note: this patch won't compile in iio/testing without this
>patch:
>> > > a8f447be8056 ("mfd: Add resource managed APIs for
>mfd_add_devices")
>> > >
>> > > Signed-off-by: Ksenija Stanojevic <ksenija.stanojevic@gmail.com>
>> > > ---
>> > > Changes in v5:
>> > > - use DEFINE_RES_MEM
>> > > - don't pass ioreammaped adress to platform cells
>> > > - move comment outside of struct mxs_lradc
>> > > - change type of argument in mxs_lradc_reg_set,
>mxs_lradc_reg_clear,
>> > > mxs_lradc_reg_wrt (struct mxs_lradc * -> void __iomem *)
>> > >
>> > > Changes in v4:
>> > > - update copyright
>> > > - use DEFINE_RES_IRQ_NAMED
>> > > - remove mxs_lradc_add_device function
>> > > - use struct mfd_cell in static form
>> > > - improve spacing
>> > > - remove unnecessary comment
>> > > - remove platform_get_irq
>> > > - remove touch_ret and use ret instead
>> > > - rename use_touchscreen to touchscreen_wire
>> > > - use goto statements
>> > > - remove irq[13], irq_count and irq_name from struct mxs_lradc
>> > > - remove all defines from inside the struct definition
>> > >
>> > > Changes in v3:
>> > > - add note to commit message
>> > > - move switch statement into if(touch_ret == 0) branch
>> > > - add MODULE_AUTHOR
>> > >
>> > > Changes in v2:
>> > > - do not change spacing in Kconfig
>> > > - make struct mfd_cell part of struct mxs_lradc
>> > > - use switch instead of if in mxs_lradc_irq_mask
>> > > - use only necessary header files in mxs_lradc.h
>> > > - use devm_mfd_add_device
>> > > - use separate function to register mfd device
>> > > - change licence to GPL
>> > > - add copyright
>> > >
>> > > drivers/mfd/Kconfig | 17 +++
>> > > drivers/mfd/Makefile | 1 +
>> > > drivers/mfd/mxs-lradc.c | 255
>++++++++++++++++++++++++++++++++++++++++++
>> > > include/linux/mfd/mxs-lradc.h | 194
>++++++++++++++++++++++++++++++++
>> > > 4 files changed, 467 insertions(+)
>> > > create mode 100644 drivers/mfd/mxs-lradc.c
>> > > create mode 100644 include/linux/mfd/mxs-lradc.h
>
>[...]
>
>> > > +static int mxs_lradc_probe(struct platform_device *pdev)
>> > > +{
>> > > + const struct of_device_id *of_id;
>> > > + struct device *dev = &pdev->dev;
>> > > + struct device_node *node = dev->of_node;
>> > > + struct mxs_lradc *lradc;
>> > > + struct mfd_cell *cells = NULL;
>> > > + int ret = 0;
>> > > + u32 ts_wires = 0;
>> > > +
>> > > + lradc = devm_kzalloc(&pdev->dev, sizeof(*lradc),
>GFP_KERNEL);
>> > > + if (!lradc)
>> > > + return -ENOMEM;
>> > > +
>> > > + of_id = of_match_device(mxs_lradc_dt_ids, &pdev->dev);
>> > > + lradc->soc = (enum mxs_lradc_id)of_id->data;
>> >
>> > Unnecessary cast.
>>
>> If I remove the cast I get this error:
>> drivers/mfd/mxs-lradc.c:148:13: error: incompatible types when
>> assigning to type ‘enum mxs_lradc_id’ from type ‘const void * const’
>
>Ah, because it's a const. Fair enough.

No, it's because void * has to be cast to a non-pointer data type explicitly.


Thanks.

--
Dmitry

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