On 24.09.20 01:22, Andre Przywara wrote:
The cfi-flash driver uses an open-coded version of the generic algorithm to decode and translate multiple frames of a "reg" property.
This starts off the wrong foot by using the address-cells and size-cells properties of *this* very node, and not of the parent. This somewhat happened to work back when we were using a wrong default size of 2, but broke about a year ago with commit 0ba41ce1b781 ("libfdt: return correct value if #size-cells property is not present").
Instead of fixing the reinvented wheel, just use the generic function that does all of this properly.
This fixes U-Boot on QEMU (-arm64), which was crashing due to decoding a wrong flash base address: DRAM: 1 GiB Flash: "Synchronous Abort" handler, esr 0x96000044 elr: 00000000000211dc lr : 00000000000211b0 (reloc) elr: 000000007ff5e1dc lr : 000000007ff5e1b0 x0 : 00000000000000f0 x1 : 000000007ff5e1d8 x2 : 000000007edfbc48 x3 : 0000000000000000 x4 : 0000000000000000 x5 : 00000000000000f0 x6 : 000000007edfbc2c x7 : 0000000000000000 x8 : 000000007ffd8d70 x9 : 000000000000000c x10: 0400000000000003 x11: 0000000000000055 ^^^^^^^^^^^^^^^^
Signed-off-by: Andre Przywara andre.przywara@arm.com
Changes v1 .. v2:
- Use live tree compatible function
- Drop unneeded size variable
Reviewed-by: Stefan Roese sr@denx.de
Thanks, Stefan
drivers/mtd/cfi_flash.c | 24 ++++++------------------ 1 file changed, 6 insertions(+), 18 deletions(-)
diff --git a/drivers/mtd/cfi_flash.c b/drivers/mtd/cfi_flash.c index b7289ba5394..9e3a652f445 100644 --- a/drivers/mtd/cfi_flash.c +++ b/drivers/mtd/cfi_flash.c @@ -2468,29 +2468,17 @@ unsigned long flash_init(void) #ifdef CONFIG_CFI_FLASH /* for driver model */ static int cfi_flash_probe(struct udevice *dev) {
- const fdt32_t *cell;
- int addrc, sizec;
- int len, idx;
- fdt_addr_t addr;
- int idx;
- addrc = dev_read_addr_cells(dev);
- sizec = dev_read_size_cells(dev);
- /* decode regs; there may be multiple reg tuples. */
- cell = dev_read_prop(dev, "reg", &len);
- if (!cell)
return -ENOENT;- idx = 0;
- len /= sizeof(fdt32_t);
- while (idx < len) {
phys_addr_t addr;addr = dev_translate_address(dev, cell + idx);
for (idx = 0; idx < CFI_MAX_FLASH_BANKS; idx++) {
addr = dev_read_addr_index(dev, idx);if (addr == FDT_ADDR_T_NONE)break;flash_info[cfi_flash_num_flash_banks].dev = dev; flash_info[cfi_flash_num_flash_banks].base = addr; cfi_flash_num_flash_banks++;
idx += addrc + sizec;
Viele Grüße, Stefan