[Letux-kernel] [PATCH 00/20] A bunch of JZ4730 fixups for letux-kernel
H. Nikolaus Schaller
hns at goldelico.com
Wed Nov 18 10:33:29 CET 2020
Hi Lubomir,
I am baffled and amazed!
Especially that you managed to boot the kernel.
Great. Great. Great. Thanks!
Yes,
I will pick up this to integrate into the Letux tree.
What I do not exactly get is if we need a new U-Boot? I had thought to use the existing U-Boot
because I am not aware that there is a key combination to load a different U-Boot from SD card.
And my L400 still has no serial console connector to watch U Boot and break to manual mode...
So maybe could you briefly describe the steps how you did boot the kernel?
Best regards and thanks again,
Nikolaus
PS: most of the work was by Paul not by me... I am just the "system integrator".
> Am 17.11.2020 um 21:57 schrieb Lubomir Rintel <lkundrak at v3.sk>:
>
> Hello Nikolaus,
>
> Chained to this message are JZ4730-related patches I've made against the
> Letux kernel.
>
> I essentially needed a Device Tree that would be good enough for U-Boot
> bringup and your branches provided very helpful. I'm sharing the changes
> I've had to make.
>
> I've given booting the kernel a shot and it fixed some oversights in the CGU
> driver as well. It seems to lock up while calculating the bogomips due to not
> timer tick; I haven't looked further into it yet. Dmesg near the end of this
> message in case anyone's curious.
>
> Most of the patches fix up issues in earlier commits and are intended to be
> squashed into them. The commit to fix up is indicated in the subject line.
>
> The first 14 patches apply against letux/jz4730-v4 (as of d94118cd960a7).
> Starting with fixes to the CGU driver:
>
> [PATCH 01/20] fixup! Introduced JZ4730 watchdog timer support.
> Add the missing JZ4730_CLK_EXT_128 define.
> [PATCH 02/20] Revert "CLK: jz4730 CGU: FIXME: there is a clock label...
> [PATCH 03/20] fixup! Added missing, fixed JZ4730 DT file.
> Add more input clocks for the CGU:
> [PATCH 04/20] fixup! Add clock driver for the JZ4730.
> The parent mux is already called "mclk" -- use a different...
> [PATCH 05/20] fixup! Add clock driver for the JZ4730.
> Fix the clock type for the PCLK divisor.
> [PATCH 06/20] fixup! Add clock driver for the JZ4730.
> The UHC mux is already called "uhc" -- use a different...
> [PATCH 07/20] fixup! Add clock driver for the JZ4730.
> This fixes the WDT clock:
> [PATCH 08/20] fixup! Add clock driver for the JZ4730
> Define a SPI clock.
>
> Then come the DT fixes, still applicable against letux/jz4730-v4:
>
> [PATCH 09/20] fixup! Added missing, fixed JZ4730 DT file.
> Make the UART compatible with ingenic,jz4780-uart.
> [PATCH 10/20] fixup! Added missing, fixed JZ4730 DT file.
> TCU on jz4730 is not a mfd.
> [PATCH 11/20] fixup! Added missing, fixed JZ4730 DT file.
> Fix the watchdog node name.
> [PATCH 12/20] fixup! Added missing, fixed JZ4730 DT file.
> Remove an unused header. Copy & paste issue I guess.
> [PATCH 13/20] MIPS: DTS: ingenic/jz4730: Add EMC node
> Add a node for the EMC node, with a subnode for the NAND...
> [PATCH 14/20] MIPS: DTS: ingenic/jz4730: Add Ethernet node
> Add a node for the ethernet MAC, with a subnode for the...
>
> Patches that apply against letux/dt-mipsbook400 (as of 05be4206321d3) follow.
> They generally improve (hopefully the DT). The last one is sort of bogus;
> only included for reference if anyone wonders for any reason why what I'm
> submitting to U-Boot differs here.
>
> [PATCH 15/20] fixup! Mipsbook400: add includes for bindings
> According to the specification [1], /chosen/stdout-path is...
> [PATCH 16/20] fixup! Fixed Letux 400 MMC, backlight pinctrl usage.
> The vmmc-supply property should be a phandle of the...
> [PATCH 17/20] fixup! Added more JZ4730 device definitions.
> Fix the NAND controller pinctrl and enable the device.
> [PATCH 18/20] MIPS: DTS: ingenic/mipsbook_400: Add the NAND memory node
> ...along with the partition map.
> [PATCH 19/20] MIPS: DTS: ingenic/mipsbook_400: Hook on the Ethernet
> Add a PHY node, use the MAC function on appropriate pins...
> [PATCH 20/20] [remove me] MIPS: DTS: ingenic/mipsbook_400: Add the...
> This is a kludge to make U-Boot use the WDT for system...
>
> And here's the dmesg:
>
> [ 0.000000] Linux version 5.10.0-rc4+ (lkundrak at demiurge.local) (mips64-linux-gnu-gcc (GCC) 10.2.1 20200826 (Red Hat Cross 10.2.1-3), GNU ld version 2.35.1-1.fc33) #99 PREEMPT Tue Nov 17 0
> [ 0.000000] CPU0 revision is: 02d0024f (Ingenic XBurst)
> [ 0.000000] MIPS: machine is letux400,minipc
> [ 0.000000] earlycon: jz4740_uart0 at MMIO32 0x10030000 (options '115200n8')
> [ 0.000000] printk: bootconsole [jz4740_uart0] enabled
> [ 0.000000] printk: debug: ignoring loglevel setting.
> [ 0.000000] User-defined physical RAM map overwrite
> [ 0.000000] Initrd not found or empty - disabling initrd
> [ 0.000000] cma: Reserved 32 MiB at 0x00800000
> [ 0.000000] Primary instruction cache 16kB, VIVT, 4-way, linesize 32 bytes.
> [ 0.000000] Primary data cache 16kB, 4-way, VIPT, no aliases, linesize 32 bytes
> [ 0.000000] Zone ranges:
> [ 0.000000] Normal [mem 0x0000000000000000-0x000000001fffffff]
> [ 0.000000] Movable zone start for each node
> [ 0.000000] Early memory node ranges
> [ 0.000000] node 0: [mem 0x0000000000000000-0x0000000007ffffff]
> [ 0.000000] Initmem setup node 0 [mem 0x0000000000000000-0x0000000007ffffff]
> [ 0.000000] On node 0 totalpages: 32768
> [ 0.000000] Normal zone: 256 pages used for memmap
> [ 0.000000] Normal zone: 0 pages reserved
> [ 0.000000] Normal zone: 32768 pages, LIFO batch:7
> [ 0.000000] pcpu-alloc: s0 r0 d32768 u32768 alloc=1*32768
> [ 0.000000] pcpu-alloc: [0] 0
> [ 0.000000] Built 1 zonelists, mobility grouping on. Total pages: 32512
> [ 0.000000] Kernel command line: mem=128M earlycon=jz4740_uart,mmio32,0x10030000,115200n8 console=ttyS0,115200n8 irqpoll ignore_loglevel
> [ 0.000000] Misrouted IRQ fixup and polling support enabled
> [ 0.000000] This may significantly impact system performance
> [ 0.000000] Dentry cache hash table entries: 16384 (order: 4, 65536 bytes, linear)
> [ 0.000000] Inode-cache hash table entries: 8192 (order: 3, 32768 bytes, linear)
> [ 0.000000] mem auto-init: stack:off, heap alloc:off, heap free:off
> [ 0.000000] Memory: 90684K/131072K available (3568K kernel code, 218K rwdata, 1196K rodata, 1284K init, 145K bss, 7620K reserved, 32768K cma-reserved)
> [ 0.000000] rcu: Preemptible hierarchical RCU implementation.
> [ 0.000000] Trampoline variant of Tasks RCU enabled.
> [ 0.000000] rcu: RCU calculated value of scheduler-enlistment delay is 10 jiffies.
> [ 0.000000] NR_IRQS: 256
> [ 0.000000] random: get_random_bytes called from start_kernel+0x63c/0x864 with crng_init=0
> [ 0.000000] timer_probe: no matching timers found
> [ 0.000000] sched_clock: 32 bits at 100 Hz, resolution 10000000ns, wraps every 21474836475000000ns
>
> And in case git is more convenient than e-mail, here are my branches:
>
> git pull git://git.kernel.org/pub/scm/linux/kernel/git/lkundrak/linux.git lr/letux/jz4730-v4
> git pull git://git.kernel.org/pub/scm/linux/kernel/git/lkundrak/linux.git lr/letux/dt-mipsbook400
>
> Take care
> Lubo
>
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