kernel/linux
0
Fork 0
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ synced 2026-11-10 20:48:12 +00:00
Code Issues Releases Packages Activity
No description
1,170,013 commits 117 branches 5,827 tags 6.3 GiB
  • C 96.8%
  • Assembly 0.9%
  • Rust 0.7%
  • Shell 0.6%
  • Python 0.5%
  • Other 0.3%
Find a file
Cristian Ciocaltea ec956e2c6f dt-bindings: serial: snps-dw-apb-uart: Switch dma-names order 
Commit 370f696e44 ("dt-bindings: serial: snps-dw-apb-uart: add dma &
dma-names properties") documented dma-names property to handle Allwinner
D1 dtbs_check warnings, but relies on the rx->tx ordering, which is the
reverse of what a different board expects:

  rk3326-odroid-go2.dtb: serial@ff030000: dma-names:0: 'rx' was expected

A quick and incomplete check shows the inconsistency is present in many
other DTS files:

$ git grep -A10 snps,dw-apb-uart | grep dma-names | sort -u
arch/arm64/boot/dts/rockchip/px30.dtsi-         dma-names = "tx", "rx";
arch/arm64/boot/dts/rockchip/rk3328.dtsi-       dma-names = "tx", "rx";
arch/arm64/boot/dts/rockchip/rk3588s.dtsi-      dma-names = "tx", "rx";
arch/arm/boot/dts/rk3066a.dtsi-                 dma-names = "tx", "rx";
arch/arm/boot/dts/rk3128.dtsi-                  dma-names = "tx", "rx";
arch/arm/boot/dts/rk3288.dtsi-                  dma-names = "tx", "rx";
arch/arm/boot/dts/rv1126.dtsi-                  dma-names = "tx", "rx";
arch/arm/boot/dts/socfpga.dtsi-                 dma-names = "tx", "rx";
arch/arm/boot/dts/sun6i-a31.dtsi-               dma-names = "rx", "tx";
arch/arm/boot/dts/sun8i-a23-a33.dtsi-           dma-names = "rx", "tx";
arch/arm/boot/dts/sun8i-v3s.dtsi-               dma-names = "rx", "tx";
arch/arm/boot/dts/sunxi-h3-h5.dtsi-             dma-names = "rx", "tx";
arch/riscv/boot/dts/allwinner/sunxi-d1s-t113.dtsi-  dma-names = "rx", "tx";

The initial proposed solution was to allow a flexible dma-names order in
the binding, due to potential ABI breakage concerns after fixing the DTS
files. But luckily the Allwinner boards are not really affected, since
all of them are using a shared DMA channel for rx and tx:

$ git grep -A10 snps,dw-apb-uart | grep 'sun.*dmas' | sort -u
arch/arm/boot/dts/sun6i-a31.dtsi-       dmas = <&dma 10>, <&dma 10>;
arch/arm/boot/dts/sun6i-a31.dtsi-       dmas = <&dma 22>, <&dma 22>;
arch/arm/boot/dts/sun6i-a31.dtsi-       dmas = <&dma 6>, <&dma 6>;
arch/arm/boot/dts/sun6i-a31.dtsi-       dmas = <&dma 7>, <&dma 7>;
arch/arm/boot/dts/sun6i-a31.dtsi-       dmas = <&dma 8>, <&dma 8>;
arch/arm/boot/dts/sun6i-a31.dtsi-       dmas = <&dma 9>, <&dma 9>;
arch/arm/boot/dts/sun8i-a23-a33.dtsi-   dmas = <&dma 10>, <&dma 10>;
arch/arm/boot/dts/sun8i-a23-a33.dtsi-   dmas = <&dma 6>, <&dma 6>;
arch/arm/boot/dts/sun8i-a23-a33.dtsi-   dmas = <&dma 7>, <&dma 7>;
arch/arm/boot/dts/sun8i-a23-a33.dtsi-   dmas = <&dma 8>, <&dma 8>;
arch/arm/boot/dts/sun8i-a23-a33.dtsi-   dmas = <&dma 9>, <&dma 9>;
arch/arm/boot/dts/sun8i-v3s.dtsi-       dmas = <&dma 6>, <&dma 6>;
arch/arm/boot/dts/sun8i-v3s.dtsi-       dmas = <&dma 7>, <&dma 7>;
arch/arm/boot/dts/sun8i-v3s.dtsi-       dmas = <&dma 8>, <&dma 8>;
arch/arm/boot/dts/sunxi-h3-h5.dtsi-     dmas = <&dma 6>, <&dma 6>;
arch/arm/boot/dts/sunxi-h3-h5.dtsi-     dmas = <&dma 7>, <&dma 7>;
arch/arm/boot/dts/sunxi-h3-h5.dtsi-     dmas = <&dma 8>, <&dma 8>;
arch/arm/boot/dts/sunxi-h3-h5.dtsi-     dmas = <&dma 9>, <&dma 9>;
arch/riscv/boot/dts/allwinner/sunxi-d1s-t113.dtsi-  dmas = <&dma 14>, <&dma 14>;
arch/riscv/boot/dts/allwinner/sunxi-d1s-t113.dtsi-  dmas = <&dma 15>, <&dma 15>;
arch/riscv/boot/dts/allwinner/sunxi-d1s-t113.dtsi-  dmas = <&dma 16>, <&dma 16>;
arch/riscv/boot/dts/allwinner/sunxi-d1s-t113.dtsi-  dmas = <&dma 17>, <&dma 17>;
arch/riscv/boot/dts/allwinner/sunxi-d1s-t113.dtsi-  dmas = <&dma 18>, <&dma 18>;
arch/riscv/boot/dts/allwinner/sunxi-d1s-t113.dtsi-  dmas = <&dma 19>, <&dma 19>;

Switch dma-names order to tx->rx as the first step in fixing the
inconsistency. The remaining DTS fixes will be handled by separate
patches.

Signed-off-by: Cristian Ciocaltea <cristian.ciocaltea@collabora.com>
Reviewed-by: Conor Dooley <conor.dooley@microchip.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20230321215624.78383-2-cristian.ciocaltea@collabora.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
History 2023-03-29 11:06:44 +02:00
arch Merge 6.3-rc3 into tty-next 2023-03-20 09:14:37 +01:00
block block: remove obsolete config BLOCK_COMPAT 2023-03-16 09:35:44 -06:00
certs Kbuild updates for v6.3 2023-02-26 11:53:25 -08:00
crypto Networking changes for 6.3. 2023-02-21 18:24:12 -08:00
Documentation dt-bindings: serial: snps-dw-apb-uart: Switch dma-names order 2023-03-29 11:06:44 +02:00
drivers serial: 8250: Fix serial8250_tx_empty() race with DMA Tx 2023-03-29 10:55:53 +02:00
fs Fix a double unlock bug on an error path in ext4, found by smatch and 2023-03-19 09:38:26 -07:00
include tty: n_gsm: add ioctl for DLC specific parameter configuration 2023-03-29 10:50:48 +02:00
init Kbuild updates for v6.3 2023-02-26 11:53:25 -08:00
io_uring io_uring/rsrc: fix folio accounting 2023-03-16 09:32:18 -06:00
ipc Merge branch 'work.namespace' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2023-02-24 19:20:07 -08:00
kernel Tracing fixes for 6.3: 2023-03-19 10:46:02 -07:00
lib Zstd fixes for v6.3 2023-03-14 17:03:25 -07:00
LICENSES LICENSES: Add the copyleft-next-0.3.1 license 2022-11-08 15:44:01 +01:00
mm mm/damon/paddr: fix folio_nr_pages() after folio_put() in damon_pa_mark_accessed_or_deactivate() 2023-03-07 17:04:55 -08:00
net Including fixes from netfilter, wifi and ipsec. 2023-03-17 13:31:16 -07:00
rust Rust fixes for 6.3-rc1 2023-03-03 14:51:15 -08:00
samples LoongArch changes for v6.3 2023-03-01 09:27:00 -08:00
scripts kbuild: use git-archive for source package creation 2023-03-16 22:46:12 +09:00
security capability: just use a 'u64' instead of a 'u32[2]' array 2023-03-01 10:01:22 -08:00
sound ALSA: hda/ca0132: fixup buffer overrun at tuning_ctl_set() 2023-03-14 17:04:53 +01:00
tools Including fixes from netfilter, wifi and ipsec. 2023-03-17 13:31:16 -07:00
usr usr/gen_init_cpio.c: remove unnecessary -1 values from int file 2022-10-03 14:21:44 -07:00
virt KVM/riscv changes for 6.3 2023-02-15 12:33:28 -05:00
.clang-format cpumask: re-introduce constant-sized cpumask optimizations 2023-03-05 14:30:34 -08:00
.cocciconfig scripts: add Linux .cocciconfig for coccinelle 2016-07-22 12:13:39 +02:00
.get_maintainer.ignore get_maintainer: add Alan to .get_maintainer.ignore 2022-08-20 15:17:44 -07:00
.gitattributes .gitattributes: use 'dts' diff driver for *.dtso files 2023-02-26 15:28:23 +09:00
.gitignore kbuild: rpm-pkg: move source components to rpmbuild/SOURCES 2023-03-16 22:45:56 +09:00
.mailmap Including fixes from netfilter, wifi and ipsec. 2023-03-17 13:31:16 -07:00
.rustfmt.toml rust: add .rustfmt.toml 2022-09-28 09:02:20 +02:00
COPYING COPYING: state that all contributions really are covered by this file 2020-02-10 13:32:20 -08:00
CREDITS There is no particular theme here - mainly quick hits all over the tree. 2023-02-23 17:55:40 -08:00
Kbuild Kbuild updates for v6.1 2022-10-10 12:00:45 -07:00
Kconfig kbuild: ensure full rebuild when the compiler is updated 2020-05-12 13:28:33 +09:00
MAINTAINERS fbdev updates for kernel 6.3-rc3: 2023-03-18 16:01:34 -07:00
Makefile Linux 6.3-rc3 2023-03-19 13:27:55 -07:00
README Drop all 00-INDEX files from Documentation/ 2018-09-09 15:08:58 -06:00

README 

Linux kernel
============

There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.

In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``.  The formatted documentation can also be read online at:

    https://www.kernel.org/doc/html/latest/

There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.

Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.