Linux/OMAP-L138: How to enable NAND MTD support on kernel 4.14

Atmeg

Part Number: OMAP-L138
Other Parts Discussed in Thread: OMAPL138, OMAP-L132

Tool/software: Linux

I want to migrate from kernel 3.0.3 to latest PROCESSOR-SDK. I've build linux kernel, but it seems there is no longer support of option "Direct char device access to MTD devices" in kernel 4.14.67. There are no /dev/mtdX devices.

Here is my device tree fragment:

&aemif {
	pinctrl-names = "default";
	pinctrl-0 = <&nand_pins>;
	status = "okay";
	cs3 {
		#address-cells = <2>;
		#size-cells = <1>;
		clock-ranges;
		ranges;

		ti,cs-chipselect = <3>;

		nand@2000000,0 {
			compatible = "ti,davinci-nand";
			#address-cells = <1>;
			#size-cells = <1>;
			reg = <0 0x02000000 0x02000000
			       1 0x00000000 0x00008000>;

			ti,davinci-chipselect = <1>;
			ti,davinci-mask-ale = <0>;
			ti,davinci-mask-cle = <0>;
			ti,davinci-mask-chipsel = <0>;

			ti,davinci-nand-buswidth = <8>;
			ti,davinci-ecc-mode = "hw";
			ti,davinci-ecc-bits = <4>;
			ti,davinci-nand-use-bbt;

			partitions {
				compatible = "fixed-partitions";
				#address-cells = <1>;
				#size-cells = <1>;

				partition@0 {
					label = "u-boot";
					reg = <0 0x100000>;
				};
				partition@0x100000 {
					label = "u-boot env";
					reg = <0x100000 0x020000>;
				};
				partition@0x120000 {
					label = "kernel";
					reg = <0x120000 0x400000>;
				};
				partition@0x520000 {
					label = "fdt";
					reg = <0x520000 0x010000>;
				};
				partition@0x530000 {
					label = "filesystem";
					reg = <0x530000 0>;
				};
			};
		};
	};
};

over 6 years ago

0 Yordan Kovachev over 6 years ago

TI__Guru**** 161600 points

Hi,

Try setting up the MTD & MTD_NAND configurations in the defconfig file as "=y", currently they are built as kernel modules.

Best Regards,
Yordan

0 Atmeg over 6 years ago in reply to Yordan Kovachev

Intellectual 870 points

I already set all of this to =y:

#
# Bus devices
#
# CONFIG_BRCMSTB_GISB_ARB is not set
# CONFIG_SIMPLE_PM_BUS is not set
# CONFIG_VEXPRESS_CONFIG is not set
CONFIG_DA8XX_MSTPRI=y
# CONFIG_CONNECTOR is not set
CONFIG_MTD=y
# CONFIG_MTD_TESTS is not set
# CONFIG_MTD_REDBOOT_PARTS is not set
# CONFIG_MTD_CMDLINE_PARTS is not set
# CONFIG_MTD_AFS_PARTS is not set
# CONFIG_MTD_OF_PARTS is not set
# CONFIG_MTD_AR7_PARTS is not set

#
# Partition parsers
#

#
# User Modules And Translation Layers
#
CONFIG_MTD_BLKDEVS=y
CONFIG_MTD_BLOCK=y
# CONFIG_FTL is not set
# CONFIG_NFTL is not set
# CONFIG_INFTL is not set
# CONFIG_RFD_FTL is not set
# CONFIG_SSFDC is not set
# CONFIG_SM_FTL is not set
# CONFIG_MTD_OOPS is not set
# CONFIG_MTD_PARTITIONED_MASTER is not set

#
# RAM/ROM/Flash chip drivers
#
# CONFIG_MTD_CFI is not set
# CONFIG_MTD_JEDECPROBE is not set
CONFIG_MTD_MAP_BANK_WIDTH_1=y
CONFIG_MTD_MAP_BANK_WIDTH_2=y
CONFIG_MTD_MAP_BANK_WIDTH_4=y
# CONFIG_MTD_MAP_BANK_WIDTH_8 is not set
# CONFIG_MTD_MAP_BANK_WIDTH_16 is not set
# CONFIG_MTD_MAP_BANK_WIDTH_32 is not set
CONFIG_MTD_CFI_I1=y
CONFIG_MTD_CFI_I2=y
# CONFIG_MTD_CFI_I4 is not set
# CONFIG_MTD_CFI_I8 is not set
# CONFIG_MTD_RAM is not set
# CONFIG_MTD_ROM is not set
# CONFIG_MTD_ABSENT is not set

#
# Mapping drivers for chip access
#
# CONFIG_MTD_COMPLEX_MAPPINGS is not set
# CONFIG_MTD_PLATRAM is not set

#
# Self-contained MTD device drivers
#
# CONFIG_MTD_DATAFLASH is not set
# CONFIG_MTD_MCHP23K256 is not set
# CONFIG_MTD_SST25L is not set
# CONFIG_MTD_SLRAM is not set
# CONFIG_MTD_PHRAM is not set
# CONFIG_MTD_MTDRAM is not set
# CONFIG_MTD_BLOCK2MTD is not set

#
# Disk-On-Chip Device Drivers
#
# CONFIG_MTD_DOCG3 is not set
CONFIG_MTD_NAND_ECC=y
# CONFIG_MTD_NAND_ECC_SMC is not set
CONFIG_MTD_NAND=y
# CONFIG_MTD_NAND_ECC_BCH is not set
# CONFIG_MTD_SM_COMMON is not set
# CONFIG_MTD_NAND_DENALI_DT is not set
# CONFIG_MTD_NAND_GPIO is not set
# CONFIG_MTD_NAND_OMAP_BCH_BUILD is not set
# CONFIG_MTD_NAND_DISKONCHIP is not set
# CONFIG_MTD_NAND_DOCG4 is not set
# CONFIG_MTD_NAND_NANDSIM is not set
# CONFIG_MTD_NAND_BRCMNAND is not set
# CONFIG_MTD_NAND_PLATFORM is not set
CONFIG_MTD_NAND_DAVINCI=y
# CONFIG_MTD_ONENAND is not set

0 Yordan Kovachev over 6 years ago in reply to Atmeg

TI__Guru**** 161600 points

To which Processor SDK Linux are you trying to migrate? can you share your bootlog?

Best Regards,
Yordan

0 Atmeg over 6 years ago in reply to Yordan Kovachev

Intellectual 870 points

omapl138-lcdk-linux-sdk-src-05.01.00.11

Bootlog:

Starting kernel ...

Booting Linux on physical CPU 0x0
Linux version 4.14.67+ (grip@grip-VirtualBox) (gcc version 4.5.3 20110311 (prerelease) (GCC)) #30 PREEMPT Wed Jan 16 12:03:22 MSK 2019
CPU: ARM926EJ-S [41069265] revision 5 (ARMv5TEJ), cr=0005317f
CPU: VIVT data cache, VIVT instruction cache
OF: fdt: Machine model: OMAP-L138 FOX2
Memory policy: Data cache writeback
DaVinci da850/omap-l138/am18x variant 0x1
Built 1 zonelists, mobility grouping on.  Total pages: 24288
Kernel command line: console=ttyS1,115200n8 root=/dev/mmcblk0p2 rw rootwait ip=off mem=32M@0xc0000000 mem=64M@0xc4000000
PID hash table entries: 512 (order: -1, 2048 bytes)
Dentry cache hash table entries: 16384 (order: 4, 65536 bytes)
Inode-cache hash table entries: 8192 (order: 3, 32768 bytes)
Memory: 86692K/98304K available (7493K kernel code, 354K rwdata, 2280K rodata, 220K init, 157K bss, 11612K reserved, 0K cma-reserved)
Virtual kernel memory layout:
    vector  : 0xffff0000 - 0xffff1000   (   4 kB)
    fixmap  : 0xffc00000 - 0xfff00000   (3072 kB)
    vmalloc : 0xc8800000 - 0xff800000   ( 880 MB)
    lowmem  : 0xc0000000 - 0xc8000000   ( 128 MB)
    modules : 0xbf000000 - 0xc0000000   (  16 MB)
      .text : 0xc0008000 - 0xc0759a78   (7495 kB)
      .init : 0xc0995000 - 0xc09cc000   ( 220 kB)
      .data : 0xc09cc000 - 0xc0a24880   ( 355 kB)
       .bss : 0xc0a24880 - 0xc0a4c054   ( 158 kB)
SLUB: HWalign=32, Order=0-3, MinObjects=0, CPUs=1, Nodes=1
Preemptible hierarchical RCU implementation.
        Tasks RCU enabled.
NR_IRQS: 245
clocksource: timer0_1: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 79635851949 ns
sched_clock: 32 bits at 24MHz, resolution 41ns, wraps every 89478484971ns
Console: colour dummy device 80x30
Calibrating delay loop... 227.32 BogoMIPS (lpj=1136640)
pid_max: default: 32768 minimum: 301
Mount-cache hash table entries: 1024 (order: 0, 4096 bytes)
Mountpoint-cache hash table entries: 1024 (order: 0, 4096 bytes)
CPU: Testing write buffer coherency: ok
Setting up static identity map for 0xc0008400 - 0xc0008458
Hierarchical SRCU implementation.
devtmpfs: initialized
random: get_random_u32 called from bucket_table_alloc+0xac/0x1b4 with crng_init=0
VFP support v0.3: not present
clocksource: jiffies: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 19112604462750000 ns
futex hash table entries: 256 (order: -1, 3072 bytes)
pinctrl core: initialized pinctrl subsystem
NET: Registered protocol family 16
DMA: preallocated 256 KiB pool for atomic coherent allocations
cpuidle: using governor ladder
cpuidle: using governor menu
mux: initialized RTC_ALARM
mux: Setting register RTC_ALARM
mux:    PINMUX0 (0x00000000) = 0x80000000 -> 0x20000000
edma 1c00000.edma: memcpy is disabled
edma 1c00000.edma: TI EDMA DMA engine driver
edma 1e30000.edma: memcpy is disabled
edma 1e30000.edma: TI EDMA DMA engine driver
SCSI subsystem initialized
usbcore: registered new interface driver usbfs
usbcore: registered new interface driver hub
usbcore: registered new device driver usb
i2c_davinci i2c_davinci.1: could not find pctldev for node /soc@1c00000/pinmux@14120/pinmux_i2c0_pins, deferring probe
Advanced Linux Sound Architecture Driver Initialized.
Bluetooth: Core ver 2.22
NET: Registered protocol family 31
Bluetooth: HCI device and connection manager initialized
Bluetooth: HCI socket layer initialized
Bluetooth: L2CAP socket layer initialized
Bluetooth: SCO socket layer initialized
clocksource: Switched to clocksource timer0_1
NET: Registered protocol family 2
TCP established hash table entries: 1024 (order: 0, 4096 bytes)
TCP bind hash table entries: 1024 (order: 0, 4096 bytes)
TCP: Hash tables configured (established 1024 bind 1024)
UDP hash table entries: 256 (order: 0, 4096 bytes)
UDP-Lite hash table entries: 256 (order: 0, 4096 bytes)
NET: Registered protocol family 1
workingset: timestamp_bits=14 max_order=15 bucket_order=1
jffs2: version 2.2. (NAND) Â© 2001-2006 Red Hat, Inc.
Block layer SCSI generic (bsg) driver version 0.4 loaded (major 251)
io scheduler noop registered (default)
io scheduler mq-deadline registered
io scheduler kyber registered
pinctrl-single 1c14120.pinmux: 160 pins at pa fec14120 size 80
Serial: 8250/16550 driver, 10 ports, IRQ sharing disabled
console [ttyS1] disabled
serial8250.1: ttyS1 at MMIO 0x1d0c000 (irq = 53, base_baud = 9375000) is a TI DA8xx/66AK2x
console [ttyS1] enabled
serial8250.2: ttyS2 at MMIO 0x1d0d000 (irq = 61, base_baud = 9375000) is a TI DA8xx/66AK2x
brd: module loaded
spi_davinci spi_davinci.1: Controller at 0xfef0e000
libphy: Fixed MDIO Bus: probed
tun: Universal TUN/TAP device driver, 1.6
davinci_mdio davinci_mdio.0: davinci mdio revision 1.5, bus freq 2200000
davinci_mdio davinci_mdio.0: detected phy mask ffffff7f
libphy: davinci_mdio.0: probed
davinci_mdio davinci_mdio.0: phy[7]: device davinci_mdio.0:07, driver SMSC LAN8710/LAN8720
PPP generic driver version 2.4.2
PPP Deflate Compression module registered
usbcore: registered new interface driver carl9170
usbcore: registered new interface driver ar5523
usbcore: registered new interface driver ath10k_usb
usbcore: registered new interface driver mt7601u
usbcore: registered new interface driver rt2500usb
usbcore: registered new interface driver rt73usb
usbcore: registered new interface driver rt2800usb
usbcore: registered new interface driver rtl8187
usbcore: registered new interface driver rtl8192cu
usbcore: registered new interface driver rtl8xxxu
ehci_hcd: USB 2.0 'Enhanced' Host Controller (EHCI) Driver
ohci_hcd: USB 1.1 'Open' Host Controller (OHCI) Driver
ohci-da8xx: DA8XX
ohci-da8xx ohci-da8xx: USB Host Controller
ohci-da8xx ohci-da8xx: new USB bus registered, assigned bus number 1
ohci-da8xx ohci-da8xx: irq 59, io mem 0x01e25000
usb usb1: New USB device found, idVendor=1d6b, idProduct=0001
usb usb1: New USB device strings: Mfr=3, Product=2, SerialNumber=1
usb usb1: Product: USB Host Controller
usb usb1: Manufacturer: Linux 4.14.67+ ohci_hcd
usb usb1: SerialNumber: ohci-da8xx
hub 1-0:1.0: USB hub found
hub 1-0:1.0: 1 port detected
usbcore: registered new interface driver usb-storage
usbcore: registered new interface driver usbserial
usbcore: registered new interface driver ftdi_sio
usbserial: USB Serial support registered for FTDI USB Serial Device
usb_phy_generic usb_phy_generic.0.auto: usb_phy_generic.0.auto supply vcc not found, using dummy regulator
musb-hdrc musb-hdrc.1.auto: MUSB HDRC host driver
musb-hdrc musb-hdrc.1.auto: new USB bus registered, assigned bus number 2
usb usb2: New USB device found, idVendor=1d6b, idProduct=0002
usb usb2: New USB device strings: Mfr=3, Product=2, SerialNumber=1
usb usb2: Product: MUSB HDRC host driver
usb usb2: Manufacturer: Linux 4.14.67+ musb-hcd
usb usb2: SerialNumber: musb-hdrc.1.auto
hub 2-0:1.0: USB hub found
hub 2-0:1.0: 1 port detected
using random self ethernet address
using random host ethernet address
usb0: HOST MAC 42:da:ca:cd:9a:45
usb0: MAC 02:48:c8:2b:61:32
using random self ethernet address
using random host ethernet address
g_ether gadget: Ethernet Gadget, version: Memorial Day 2008
g_ether gadget: g_ether ready
i2c /dev entries driver
Driver for 1-wire Dallas network protocol.
davinci-wdt davinci-wdt: heartbeat 60 sec
usbcore: registered new interface driver btusb
sdhci: Secure Digital Host Controller Interface driver
sdhci: Copyright(c) Pierre Ossman
davinci_mmc da830-mmc.0: Got CD GPIO
davinci_mmc da830-mmc.0: Using DMA, 4-bit mode
sdhci-pltfm: SDHCI platform and OF driver helper
nf_conntrack version 0.5.0 (2048 buckets, 8192 max)
ip_tables: (C) 2000-2006 Netfilter Core Team
arp_tables: arp_tables: (C) 2002 David S. Miller
NET: Registered protocol family 17
Bluetooth: RFCOMM socket layer initialized
Bluetooth: RFCOMM ver 1.11
Bluetooth: BNEP (Ethernet Emulation) ver 1.3
Bluetooth: BNEP socket layer initialized
mmc0: host does not support reading read-only switch, assuming write-enable
tlv320aic3x-codec 0-0018: 0-0018 supply IOVDD not found, using dummy regulator
tlv320aic3x-codec 0-0018: 0-0018 supply DVDD not found, using dummy regulator
mmc0: Problem switching card into high-speed mode!
mmc0: new SDHC card at address 0001
mmcblk0: mmc0:0001 SD16G 7.45 GiB
 mmcblk0: p1 p2
tlv320aic3x-codec 0-0018: 0-0018 supply AVDD not found, using dummy regulator
tlv320aic3x-codec 0-0018: 0-0018 supply DRVDD not found, using dummy regulator
tlv320aic3x-codec 0-0018: Invalid supply voltage(s) AVDD: -22, DVDD: -22
console [netcon0] enabled
netconsole: network logging started
davinci_emac davinci_emac.1: incompatible machine/device type for reading mac address
davinci_emac davinci_emac.1: using random MAC addr: 22:ee:29:e0:f9:e2
hctosys: unable to open rtc device (rtc0)
ALSA device list:
  No soundcards found.
EXT4-fs (mmcblk0p2): mounting ext3 file system using the ext4 subsystem
random: fast init done
EXT4-fs (mmcblk0p2): recovery complete
EXT4-fs (mmcblk0p2): mounted filesystem with ordered data mode. Opts: (null)
VFS: Mounted root (ext3 filesystem) on device 179:2.
devtmpfs: mounted
Freeing unused kernel memory: 220K
This architecture does not have kernel memory protection.
EXT4-fs (mmcblk0p2): re-mounted. Opts: data=ordered
Starting logging: OK
Starting watchdog...
Initializing random number generator... random: dd: uninitialized urandom read (512 bytes read)
done.
Starting network...
davinci_mdio davinci_mdio.0: resetting idled controller
SMSC LAN8710/LAN8720 davinci_mdio.0:07: attached PHY driver [SMSC LAN8710/LAN8720] (mii_bus:phy_addr=davinci_mdio.0:07, irq=POLL)
Starting php-fpm  done
Starting httpd: random: httpd: uninitialized urandom read (8 bytes read)
random: httpd: uninitialized urandom read (8 bytes read)
random: httpd: uninitialized urandom read (8 bytes read)
OK
/usr/bin/ssh-keygen: /usr/lib/libcrypto.so.1.0.0: no version information available (required by /usr/bin/ssh-keygen)
Starting sshd: /usr/sbin/sshd: /usr/lib/libcrypto.so.1.0.0: no version information available (required by /usr/sbin/sshd)
NOHZ: local_softirq_pending 40
OK
Starting hostapd... i2c_davinci i2c_davinci.1: RDR IRQ while no data requested
i2c_davinci i2c_davinci.1: RDR IRQ while no data requested
OK
NOHZ: local_softirq_pending 40
Starting dhcpd... OK
Starting cron ... done.
Starting application...
random: crng init done
random: 6 urandom warning(s) missed due to ratelimiting
syslink: loading out-of-tree module taints kernel.
<1>SysLink version : 2.10.08.35
SysLink module created on Date:Jan 16 2019 Time:12:04:19
<1>Trace enabled
<1>Trace SetFailureReason enabled

fox login:

0 Yordan Kovachev over 6 years ago in reply to Atmeg

TI__Guru**** 161600 points

Hi,

For some reason I can't see mtd being called in your kernel. Also did you add the CONFIG_TI_AEMIF=y in your defconfig?

Best Regards,
Yordan

0 Atmeg over 6 years ago in reply to Yordan Kovachev

Intellectual 870 points

Thank you, this was the reason, I set CONFIG_TI_AEMIF to y and now see mtd0 in /dev. But I see only:

mtd0

mtd0ro

mtdblock0

Four other mtds are not present. What may be the reason?

Part of my boot log:

davinci_mmc da830-mmc.0: Got CD GPIO
davinci_mmc da830-mmc.0: Using DMA, 4-bit mode
sdhci-pltfm: SDHCI platform and OF driver helper
nand: device found, Manufacturer ID: 0x2c, Chip ID: 0xda
nand: Micron MT29F2G08ABAEAH4
nand: 256 MiB, SLC, erase size: 128 KiB, page size: 2048, OOB size: 64
Bad block table not found for chip 0
Bad block table not found for chip 0
Scanning device for bad blocks
mmc0: host does not support reading read-only switch, assuming write-enable
mmc0: Problem switching card into high-speed mode!
mmc0: new SDHC card at address 0001
mmcblk0: mmc0:0001 SD16G 7.45 GiB
 mmcblk0: p1 p2
Bad block table written to 0x00000ffe0000, version 0x01
Bad block table written to 0x00000ffc0000, version 0x01
davinci_nand davinci-nand.0: controller rev. 2.5
nf_conntrack version 0.5.0 (2048 buckets, 8192 max)
ip_tables: (C) 2000-2006 Netfilter Core Team
arp_tables: arp_tables: (C) 2002 David S. Miller
NET: Registered protocol family 17
Bluetooth: RFCOMM socket layer initialized
Bluetooth: RFCOMM ver 1.11

I also try to set in my dt this:

&aemif {
	pinctrl-names = "default";
	pinctrl-0 = <&nand_pins>;
	status = "okay";
	cs3 {
		#address-cells = <2>;
		#size-cells = <1>;
		clock-ranges;
		ranges;

		ti,cs-chipselect = <3>;

		nand@2000000,0 {
			compatible = "ti,davinci-nand";
			#address-cells = <1>;
			#size-cells = <1>;
			reg = <0 0x02000000 0x02000000
			       1 0x00000000 0x00008000>;

			ti,davinci-chipselect = <1>;
			ti,davinci-mask-ale = <0>;
			ti,davinci-mask-cle = <0>;
			ti,davinci-mask-chipsel = <0>;

			ti,davinci-nand-buswidth = <8>;
			ti,davinci-ecc-mode = "hw";
			ti,davinci-ecc-bits = <4>;
			ti,davinci-nand-use-bbt;


			partition@0 {
				label = "u-boot";
				reg = <0 0x100000>;
			};
			partition@0x100000 {
				label = "u-boot env";
				reg = <0x100000 0x020000>;
			};
			partition@0x120000 {
				label = "kernel";
				reg = <0x120000 0x400000>;
			};
			partition@0x520000 {
				label = "fdt";
				reg = <0x520000 0x010000>;
			};
			partition@0x530000 {
				label = "filesystem";
				reg = <0x530000 0>;
			};
		};
	};
};

And this:

&aemif {
	pinctrl-names = "default";
	pinctrl-0 = <&nand_pins>;
	status = "okay";
	cs3 {
		#address-cells = <2>;
		#size-cells = <1>;
		clock-ranges;
		ranges;

		ti,cs-chipselect = <3>;

		nand@2000000,0 {
			compatible = "ti,davinci-nand";
			#address-cells = <1>;
			#size-cells = <1>;
			reg = <0 0x02000000 0x02000000
			       1 0x00000000 0x00008000>;

			ti,davinci-chipselect = <1>;
			ti,davinci-mask-ale = <0>;
			ti,davinci-mask-cle = <0>;
			ti,davinci-mask-chipsel = <0>;

			ti,davinci-nand-buswidth = <8>;
			ti,davinci-ecc-mode = "hw";
			ti,davinci-ecc-bits = <4>;
			ti,davinci-nand-use-bbt;

			/*
			 * The OMAP-L132/L138 Bootloader doc SPRAB41E reads:
			 * "To boot from NAND Flash, the AIS should be written
			 * to NAND block 1 (NAND block 0 is not used by default)".
			 * The same doc mentions that for ROM "Silicon Revision 2.1",
			 * "Updated NAND boot mode to offer boot from block 0 or block 1".
			 * However the limitaion is left here by default for compatibility
			 * with older silicon and because it needs new boot pin settings
			 * not possible in stock LCDK.
			 */
			partitions {
				compatible = "fixed-partitions";
				#address-cells = <1>;
				#size-cells = <1>;

				partition@0 {
					label = "u-boot";
					reg = <0 0x100000>;
				};
				partition@0x100000 {
					label = "u-boot env";
					reg = <0x100000 0x020000>;
				};
				partition@0x120000 {
					label = "kernel";
					reg = <0x120000 0x400000>;
				};
				partition@0x520000 {
					label = "fdt";
					reg = <0x520000 0x010000>;
				};
				partition@0x530000 {
					label = "filesystem";
					reg = <0x530000 0>;
				};
			};
		};
	};
};

And there is no difference, only mtd0

0 Yordan Kovachev over 6 years ago in reply to Atmeg

TI__Guru**** 161600 points

Ok, are they properly defined in u-boot? Have you verified your bootargs (cmdline & NANDARGS) in u-boot/include/configs/omapl138_lcdk.h.

Best Regards,
Yordan

0 Atmeg over 6 years ago in reply to Yordan Kovachev

Intellectual 870 points

I boots from SD card now, I don't pass nand params from cmdline.

0 Atmeg over 6 years ago in reply to Atmeg

Intellectual 870 points

I need for any suggestions.. Looks like any changes in partitions node in dt has no effect on mtds list in /dev

# ls /dev | grep mtd
mtd0
mtd0ro
mtdblock0

Should be:

mtd0
mtd0ro
mtd1
mtd1ro
mtd2
mtd2ro
mtdblock0
mtdblock1
mtdblock2

and so on..

AFAIK don't matter how I setup partitions in u-boot, linux looks about partition layout from dt. Am I right?

0 Yordan Kovachev over 6 years ago in reply to Atmeg

TI__Guru**** 161600 points

Can you try using the following code:
/*
* The OMAP-L132/L138 Bootloader doc SPRAB41E reads:
* "To boot from NAND Flash, the AIS should be written
* to NAND block 1 (NAND block 0 is not used by default)".
* The same doc mentions that for ROM "Silicon Revision 2.1",
* "Updated NAND boot mode to offer boot from block 0 or block 1".
* However the limitaion is left here by default for compatibility
* with older silicon and because it needs new boot pin settings
* not possible in stock LCDK.
*/
- partitions {
- compatible = "fixed-partitions";
- #address-cells = <1>;
- #size-cells = <1>;

partition@0 {
label = "u-boot";
reg = <0 0x100000>;
};
partition@0x100000 {
label = "u-boot env";
reg = <0x100000 0x020000>;
};
partition@0x120000 {
label = "kernel";
reg = <0x120000 0x400000>;
};
partition@0x520000 {
label = "fdt";
reg = <0x520000 0x010000>;
};
partition@0x530000 {
label = "filesystem";
reg = <0x530000 0>;
};
- };
};

In other words remove the
partitions {
compatible = "fixed-partitions";
#address-cells = <1>;
#size-cells = <1>;
part.

Best Regards,
Yordan

0 Atmeg over 6 years ago in reply to Yordan Kovachev

Intellectual 870 points

I already tried this
(here: e2e.ti.com/.../2823973
With the same result

0 Atmeg over 6 years ago in reply to Atmeg

Intellectual 870 points

The reason was that device tree mtd parser was not registered.

Should be CONFIG_MTD_OF_PARTS=y

It set as module in tisdk_omapl138-lcdk_defconfig and not set at all in davinci_all_defconfig and ti_sdk_omapl138_release_defconfig.

Processors

Processors forum

Linux/OMAP-L138: How to enable NAND MTD support on kernel 4.14