Hi Jean-Michel,
On Thu, Jun 20, 2024 at 6:25 PM Jean-Michel Hautbois
<jeanmichel.hautbois@xxxxxxxxxx> wrote:
The vf610_nfc driver is also the one which should be used for the
coldfire series. Sadly, these device don't support device-tree and so we
need to do a few modifications:
- Adapt the probe to use pdata if available
- Add a new variant as there is a small part to adapt in
vf610_nfc_select_target()
- Add the corresponding missing register definitions
Tested successfully on a 54418 custom board with a raw NAND:
[ 2.640000] nand: device found, Manufacturer ID: 0x2c, Chip ID: 0xdc
[ 2.650000] nand: Micron MT29F4G08ABADAWP
[ 2.650000] nand: 512 MiB, SLC, erase size: 128 KiB, page size: 2048, OOB size: 64
Signed-off-by: Jean-Michel Hautbois <jeanmichel.hautbois@xxxxxxxxxx>
Thanks for your patch!
--- a/drivers/mtd/nand/raw/vf610_nfc.c
+++ b/drivers/mtd/nand/raw/vf610_nfc.c
@@ -810,6 +840,7 @@ static int vf610_nfc_probe(struct platform_device *pdev)
struct vf610_nfc *nfc;
struct mtd_info *mtd;
struct nand_chip *chip;
+ struct nand_chip *pdata;
struct device_node *child;
As reported by the robot, this is now unused.
int err;
int irq;
@@ -820,30 +851,53 @@ static int vf610_nfc_probe(struct platform_device *pdev)
nfc->dev = &pdev->dev;
chip = &nfc->chip;
+ pdata = dev_get_platdata(&pdev->dev);
+ if (pdata)
+ *chip = *pdata;
+
mtd = nand_to_mtd(chip);
mtd->owner = THIS_MODULE;
mtd->dev.parent = nfc->dev;
- mtd->name = DRV_NAME;
+
+ /*
+ * We keep the MTD name unchanged to avoid breaking platforms
+ * where the MTD cmdline parser is used and the bootloader
+ * has not been updated to use the new naming scheme.
+ */
+ if (!nfc->dev->of_node)
+ mtd->name = "NAND";
+ else
+ mtd->name = DRV_NAME;
irq = platform_get_irq(pdev, 0);
if (irq < 0)
return irq;
nfc->regs = devm_platform_ioremap_resource(pdev, 0);
- if (IS_ERR(nfc->regs))
+ if (IS_ERR(nfc->regs)) {
+ dev_err(nfc->dev, "Unable to map registers!\n");
return PTR_ERR(nfc->regs);
+ }
+#ifdef CONFIG_OF
Do you need all the #ifdeffery?
nfc->clk = devm_clk_get_enabled(&pdev->dev, NULL);
Perhaps replace by devm_clk_get_optional_enabled() instead?
if (IS_ERR(nfc->clk)) {
dev_err(nfc->dev, "Unable to get and enable clock!\n");
return PTR_ERR(nfc->clk);
}
- nfc->variant = (enum vf610_nfc_variant)device_get_match_data(&pdev->dev);
- if (!nfc->variant)
- return -ENODEV;
+ const void *data = device_get_match_data(&pdev->dev);
+ nfc->variant = (enum vf610_nfc_variant)data;
+ if (!nfc->variant) {
+ dev_err(nfc->dev, "No variant data found!\n");
+ return -ENODEV;
+ }
+#else
+ nfc->variant = (enum vf610_nfc_variant)platform_get_device_id(pdev)->driver_data;
+#endif
+#ifdef CONFIG_OF
for_each_available_child_of_node(nfc->dev->of_node, child) {
for_each_available_child_of_node_scoped(...), so the child variable
no longer needs to be declared at the top.
if (of_device_is_compatible(child, "fsl,vf610-nfc-nandcs")) {
@@ -862,6 +916,10 @@ static int vf610_nfc_probe(struct platform_device *pdev)
dev_err(nfc->dev, "NAND chip sub-node missing!\n");
return -ENODEV;
}
+#else
+ nfc->clk = NULL;
+ mtd->dev.parent = &pdev->dev;
+#endif
chip->options |= NAND_NO_SUBPAGE_WRITE;
Gr{oetje,eeting}s,
Geert
--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@xxxxxxxxxxxxxx
In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
-- Linus Torvalds
