Re: [PATCH 1/2] port ndfc driver to of platform

On Thursday 14 August 2008, Sean MacLennan wrote:

On Thu, 14 Aug 2008 11:53:07 +0200
"Arnd Bergmann" [off-list ref] wrote:

quoted

quoted

+	ndfc->ndfcbase = ioremap(reg[1], reg[2]);

This could be better expressed as of_iomap().

I tried of_iomap(), but it doesn't seem to like the 3 value reg. i.e.
It doesn't skip the chip select. And since I need to read the reg
property to get the chip select any way, I just used the value directly.

If of_iomap and of_address_to_resource don't work properly, there
is probably something wrong in your device tree, maybe an incorrect
#size-cells or #address-cells or ranges property in one of
the parents. You need to fix this anyway.

quoted

quoted

-	platform_set_drvdata(pdev, ndfc);
+	__raw_writel(ccr, ndfc->ndfcbase + NDFC_CCR);
 
-	printk("NDFC NAND Driver initialized. Chip-Rev: 0x%08x\n",
-	       __raw_readl(ndfc->ndfcbase + NDFC_REVID));
+	/* Set the bank settings */
+	reg = of_get_property(ofdev->node, "bank_settings", NULL);
+	bank_settings = reg ? *reg : 0x80002222;

Your device tree does have a bank_setting, so why not assume that
all others will have it as well? I would remove the default.

I am thinking of making the bank settings an optional value. I assume
most people with 44x chips with NAND will be using u-boot. If you
enable NAND in u-boot, it should configure the bank settings for you.

I put the bank setting in my dts just to show a "complete"
configuration.

Ok, I guess that in the absence of the property, you should not do anything
with this value then, rather than assuming a default.

	Arnd <><