Hi all,
Im trying to use a physmap driver for NOR and NAND flash devices.
With NOR, everything ok. It uses CFI driver.
The problem is with NAND, cause it is connected at Freescale LocalBus UPM, and at a first look, the UPM driver is loading after the physmap (lines 14-15 in kernel output)
Here some outputs from the board:
Bootloader (U-Boot 1.2.0):
CPU: e300c1, MPC8360E, Rev: 21 at 499.999 MHz, CSB: 333 MHz Board: MPC8360KTX I2C: ready DDR RAM: 128 MB FLASH: 16 MB NAND: 64 MiB In: serial Out: serial Err: serial
Kernel (linux-2.6.17):
1 physmap nor flash device: 1000000 at ff000000 2 NOR flash: Found 1 x16 devices at 0x0 in 16-bit bank 3 Amd/Fujitsu Extended Query Table at 0x0040 4 number of CFI chips: 1 5 Using physmap partition definition 6 Creating 6 MTD partitions on "NOR flash": 7 0x00000000-0x00040000 : "u-boot" 8 0x00040000-0x00060000 : "env." 9 0x00060000-0x00080000 : "sys" 10 0x00080000-0x000c0000 : "logs" 11 0x000c0000-0x00860000 : "admin" 12 0x00860000-0x01000000 : "users" 13 14 physmap nand flash device: 4000000 at 60000000 15 UPM: User-Programmable Machine NAND driver
Device Tree Source:
localbus@e0005000 { compatible = "fsl,board-localbus"; #address-cells = <2>; #size-cells = <1>; reg = <e0005000 d8>; // BRx, ORx, etc
ranges = <0 0 ff000000 1000000 // nor flash, 16 MB 1 0 60000000 4000000>; // nand flash, 64 MB
flash@0,0 { compatible = "atmel,29LV256", "cfi-flash"; reg = <0 0 1000000>; bank-width = <2>; device-width = <1>; };
nand@1,0 { compatible = "stmicro,NAND512W3A", "fsl,upm-nand"; reg = <1 0 4000000>; //reg = <1 0 1>; width = <1>; upm = "A"; upm-addr-offset = <16>; upm-cmd-offset = <8>; gpios = <4 18>; gpio-parent = <&qe_pio>; wait-pattern; wait-write; }; };
The CFI driver is at linux/drivers/mtd/chips The UPM driver is at linux/drivers/mtd/nand
So, how can I load the UPM driver before physmap?
Thanks in advance,
-- Alemao