On 05/03/16 04:10, Brian Norris wrote:
> A couple of sparse warnings.
>
> On Fri, Feb 19, 2016 at 11:15:31PM +0200, Roger Quadros wrote:
>> Move NAND specific device tree parsing to NAND driver.
>>
>> The NAND controller node must have a compatible id, register space
>> resource and interrupt resource.
>>
>> Signed-off-by: Roger Quadros <rogerq@xxxxxx>
>> ---
>> arch/arm/mach-omap2/gpmc-nand.c | 5 +-
>> drivers/memory/omap-gpmc.c | 143 +++++++--------------------
>> drivers/mtd/nand/omap2.c | 133 +++++++++++++++++++++----
>> include/linux/platform_data/mtd-nand-omap2.h | 3 +-
>> 4 files changed, 152 insertions(+), 132 deletions(-)
>>
>> diff --git a/arch/arm/mach-omap2/gpmc-nand.c b/arch/arm/mach-omap2/gpmc-nand.c
>> index 04e6998..f6ac027 100644
>> --- a/arch/arm/mach-omap2/gpmc-nand.c
>> +++ b/arch/arm/mach-omap2/gpmc-nand.c
>
> [...]
>
>> @@ -2039,9 +1939,42 @@ static int gpmc_probe_generic_child(struct platform_device *pdev,
>> goto err;
>> }
>>
>> - ret = of_property_read_u32(child, "bank-width", &gpmc_s.device_width);
>> - if (ret < 0)
>> - goto err;
>> + if (of_node_cmp(child->name, "nand") == 0) {
>> + /* NAND specific setup */
>> + u32 val;
>
> drivers/memory/omap-gpmc.c:1952:13: originally declared here [sparse]
> drivers/memory/omap-gpmc.c:2029:21: warning: symbol 'val' shadows an earlier one [sparse]
I'll get rid of this duplicate val.
>
>> +
>> + /* Warn about older DT blobs with no compatible property */
>> + if (!of_property_read_bool(child, "compatible")) {
>> + dev_warn(&pdev->dev,
>> + "Incompatible NAND node: missing compatible");
>> + ret = -EINVAL;
>> + goto err;
>> + }
>> +
>
> [...]
>
>> diff --git a/drivers/mtd/nand/omap2.c b/drivers/mtd/nand/omap2.c
>> index 9e99199..0a637c4 100644
>> --- a/drivers/mtd/nand/omap2.c
>> +++ b/drivers/mtd/nand/omap2.c
>
> [...]
>
>> +static int omap_get_dt_info(struct device *dev, struct omap_nand_info *info)
>> +{
>> + struct device_node *child = dev->of_node;
>> + int i;
>> + const char *s;
>> +
>> + /* In old bindings, CS num is embedded in reg property */
>> + if (of_property_read_u32(child, "reg", &info->gpmc_cs) < 0) {
>
> Sparse doesn't like this one:
>
> drivers/mtd/nand/omap2.c:1660:49: warning: incorrect type in argument 3 (different signedness) [sparse]
> drivers/mtd/nand/omap2.c:1660:49: expected unsigned int [usertype] *out_value [sparse]
> drivers/mtd/nand/omap2.c:1660:49: got int *<noident> [sparse]
I'll use a temporary unsigned int variable instead.
>
>> + dev_err(dev, "reg not found in DT\n");
>> + return -EINVAL;
>> + }
>> +
>
> [...]
>
cheers,
-roger
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