Re: [PATCH v6 1/2] spi: Add Renesas R-Car Gen3 RPC-IF SPI controller driver

Sergei Shtylyov
2019-01-21T18:14:39Z

Hello!

On 01/21/2019 06:34 AM, masonccyang@mxic.com.tw wrote:

>> > +#define RPC_SMENR 0x0030 // R/W
>> > +#define RPC_SMENR_CDB(o) (((o) & 0x2) << 30)
>> > +#define RPC_SMENR_OCDB(o) (((o) & 0x2) << 28)
>> > +#define RPC_SMENR_ADB(o) (((o) & 0x2) << 24)
>> > +#define RPC_SMENR_OPDB(o) (((o) & 0x2) << 20)
>> > +#define RPC_SMENR_SPIDB(o) (((o) & 0x2) << 16)
>>
>> Ugh, s/0x2/0x3/! :-/
>>
>> [...]
>> > +#define RPC_SMDRENR 0x0064 // R/W
>> > +#define RPC_SMDRENR_HYPE (0x5 << 12)
>>
>> s/0x5/0x7/, and this is a field, not value.
>>
>
> okay, both 0x2 and 0x5 are just make sure these registers was
> writing a correct value rather than a prohibited value.
> anyway, I will patch them.

TIA.

>> [...]
>> > +static int rpc_spi_probe(struct platform_device *pdev)
>> > +{
>> > + struct spi_controller *ctlr;
>> > + struct resource *res;
>> > + struct rpc_spi *rpc;
>> > + const struct regmap_config *regmap_config;
>> > + struct device_node *rpc_if;
>> > + int ret;
>> > +
>> > + rpc_if = of_find_compatible_node(pdev->dev.of_node, NULL,
>> > + "jedec,spi-nor");
>>
>> I doubt that this is a correct function to check for the child node's
>> "compatible" prop...

You need of_get_next_child() or of_get_next_available_child().

>>
>> [...]
>> > + regmap_config = &rpc_spi_regmap_config;
>>
>> Doesn't look like this variable is needed...
>
> why ?

Why not just use &rpc_spi_regmap_config below?

>> > + rpc->regmap = devm_regmap_init_mmio(&pdev->dev, rpc->base,
>> > + regmap_config);
[...]

> Mason

MBR, Sergei