[PATCH v6 0/2] i2c: Add Loongson-2K0300 I2C controller support

[Binbin Zhou <zhoubinbin@loongson.cn>]

Hi all:

This patch set describes the I2C controller integrated the
Loongson-2K0300 chip.

It has a significantly different design from the previous I2C
controller(i2c-ls2x), such as support for master-slave transfer mode,
and  DMA transfers (implementation in progress), etc. Therefore, we try
to name it i2c-ls2x-v2.

Thanks.

======
V6:
- Rebase on linux-i2c/i2c-next;
Patch (2/2):
  - Update comment;
  - Use regmap_get_device();

Link to V5:
https://lore.kernel.org/all/cover.1773142933.git.zhoubinbin@loongson.cn/

V5:
- Rebase on linux-i2c/i2c-next;
Patch (2/2):
  - Add time.h header file;
  - Add the `MHz` suffix to `parent_rate` and `freq`;
  - Define an iterator within the for loop, with its type being
    `unsigned int`;
  - Use dev_err_probe() in loongson2_i2c_adjust_bus_speed();
  - i2c_adapter_set_node()->device_set_node().

Link to V4:
https://lore.kernel.org/all/cover.1772714348.git.zhoubinbin@loongson.cn/

V4:
- Rebase on linux-i2c/i2c-next;
Patch (2/2):
 - The parent_rate parameter type should be `unsigned long`;
 - Drop fallthrough and add missing break;
 - device_set_node()->i2c_adapter_set_node();
 - Use i2c_parse_fw_timings();
 - Use i2c_t.bus_freq_hz instead of priv->speed;
 - Sperate loongson2_i2c_handle_read() into loongson2_i2c_handle_read()
   and loongson2_i2c_handle_rx_done().

Link to V3:
https://lore.kernel.org/all/cover.1772001073.git.zhoubinbin@loongson.cn/

V3:
- Rebase on linux-i2c/i2c-next;
Patch (2/2):
 - Reorder header file follow IWYU principle;
 - Better indentation and coding style;
 - Use generic macro definitions;
 - Amend *all* struct data types;
 - Correct unreasonable variable type definitions;
 - Refact loongson2_i2c_isr_error();
 - of_property_read_u32()->device_property_read_u32();
 - Remove meaningless blank lines and output.

Link to V2:
https://lore.kernel.org/all/cover.1769476820.git.zhoubinbin@loongson.cn/

V2:
Patch (1/2):
 - Add Acked-by tag from Conor, thanks.

Patch (2/2):
 - Reorder the definitions of read() and write();
 - Adjust the calculation method for bus speed.

Link to V1:
https://lore.kernel.org/all/cover.1763018288.git.zhoubinbin@loongson.cn/

Binbin Zhou (2):
  dt-bindings: i2c: loongson,ls2x: Add ls2k0300-i2c compatible
  i2c: ls2x-v2: Add driver for Loongson-2K0300 I2C controller

 .../bindings/i2c/loongson,ls2x-i2c.yaml       |   4 +
 MAINTAINERS                                   |   1 +
 drivers/i2c/busses/Kconfig                    |  10 +
 drivers/i2c/busses/Makefile                   |   1 +
 drivers/i2c/busses/i2c-ls2x-v2.c              | 544 ++++++++++++++++++
 5 files changed, 560 insertions(+)
 create mode 100644 drivers/i2c/busses/i2c-ls2x-v2.c


base-commit: e9b13580b334040da0184a9f32106d808acd7fd5
-- 
2.52.0