Hi all:
This patch series adds support for the I2C module found on various
Loongson systems with the Loongson-2K SoC or the Loongson LS7A bridge chip.
For now, the I2C driver is suitable for DT-based or ACPI-based systems.
I have tested on Loongson-3A5000LA+LS7A1000/LS7A2000, Loongson-2K1000LA
and Loongson-2K0500.
Thanks.
Changes since V3:
- Addressed all review comments from v3
- Change the changelog text to make it clearer (1/5);
- Fix some minor bugs, such as formatting issues (2/5);
- Fix some formatting issues, such as dropping quotes and checking with
dt_binding_check (3/5);
- Deep refactoring of code for clarity (4/5).
Details: https://lore.kernel.org/all/Y4S2cnlAm3YYvZ8E@xxxxxxxxxxxxxxxxxx/
Thanks to all for their suggestions.
Changes since V2:
- Addressed all review comments from v2
- Drop of_match_ptr() in i2c-gpio to avoid potential unused warnings
(1/5);
- Introduce i2c_gpio_get_props() function as the generic interface
to get i2c-gpio props from DT or ACPI table (2/5);
- Refact ls2x i2c code, similar to removing excessive goto tags (4/5).
Thanks to Andy and Mika for their suggestions.
Changes since V1:
- Remove the function of getting the static i2c bus number from ACPI "_UID";
- Fix build warning from kernel test robot.
Binbin Zhou (5):
i2c: gpio: Fix potential unused warning for 'i2c_gpio_dt_ids'
i2c: gpio: Add support on ACPI-based system
dt-bindings: i2c: add bindings for Loongson LS2X I2C
i2c: ls2x: Add driver for Loongson-2K/LS7A I2C controller
LoongArch: Enable LS2X I2C in loongson3_defconfig
.../bindings/i2c/loongson,ls2x-i2c.yaml | 49 +++
arch/loongarch/configs/loongson3_defconfig | 1 +
drivers/i2c/busses/Kconfig | 11 +
drivers/i2c/busses/Makefile | 1 +
drivers/i2c/busses/i2c-gpio.c | 30 +-
drivers/i2c/busses/i2c-ls2x.c | 402 ++++++++++++++++++
6 files changed, 482 insertions(+), 12 deletions(-)
create mode 100644 Documentation/devicetree/bindings/i2c/loongson,ls2x-i2c.yaml
create mode 100644 drivers/i2c/busses/i2c-ls2x.c
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2.31.1
