[PATCH v3 00/23] i2c: designware_ic2: Improvements to timing and general cleanup

[Simon Glass]

This series updates the Designware I2C driver to support reading its
timing from the device tree and handling it in units of nanoseconds
instead of clock cycles.

A new function converts from nanoseconds to the units used by the I2C
controller and makes sure that the requested bus speed is not exceeded.
This is more accurate than the existing method.

The series includes a few smaller clean-ups in the same driver.

In addition the v2 series adds enums for i2c speed and updates drivers to
use them.

There is currently an existing configuration method used just for a few
x86 boards (Baytrail). This method is retained but it should be removed in
favour of using the device tree. I have not done this in this series since
I am not sure of the timings to use.

Changes in v3:
- Fix the address of comp_param1 by adding a gap
- Drop note about moving to driver model
- Use ARRAY_SIZE() for i2c_specs bounds check
- Add new patch with support for fast-plus speed
- Add new patch to move dw_i2c_speed_config to header
- Add new patch to separate out the speed calculation
- Add new patch to do more in the probe() method

Changes in v2:
- Fix 'previde' typo
- Add a few more clean-up patches for i2c

Simon Glass (23):
  i2c: designware_i2c: Add more registers
  i2c: designware_i2c: Don't allow changing IC_CLK
  i2c: designware_i2c: Include clk.h in the header file
  i2c: designware_i2c: Rename 'max' speed to 'high' speed
  i2c: designware_i2c: Use an enum for selected speed mode
  i2c: designware_i2c: Use an accurate bus clock instead of MHz
  i2c: designware_i2c: Bring in the binding file
  i2c: designware_i2c: Read device-tree properties
  i2c: designware_i2c: Drop scl_sda_cfg parameter
  i2c: designware_i2c: Put hold config in a struct
  i2c: designware_i2c: Rewrite timing calculation
  i2c: designware_i2c: Add spike supression
  i2c: Add enums for i2c speed and address size
  i2c: ast_i2c: Update to use standard enums for speed
  i2c: designware_i2c: Update to use standard enums for speed
  i2c: kona_i2c: Update to use standard enums for speed
  i2c: omap: Update to use standard enums for speed
  i2c: stm32: Update to use standard enums for speed
  i2c: Update drivers to use enum for speed
  i2c: designware_i2c: Add support for fast-plus speed
  i2c: designware_i2c: Move dw_i2c_speed_config to header
  i2c: designware_i2c: Separate out the speed calculation
  i2c: designware_i2c: Do more in the probe() method

 .../i2c/i2c-designware.txt                    |  73 +++++
 drivers/i2c/ast_i2c.c                         |   2 +-
 drivers/i2c/ast_i2c.h                         |   2 -
 drivers/i2c/designware_i2c.c                  | 300 ++++++++++++++----
 drivers/i2c/designware_i2c.h                  |  73 ++++-
 drivers/i2c/designware_i2c_pci.c              |   4 +-
 drivers/i2c/exynos_hs_i2c.c                   |   5 +-
 drivers/i2c/fsl_i2c.c                         |   3 +-
 drivers/i2c/i2c-cdns.c                        |   2 +-
 drivers/i2c/i2c-uclass.c                      |  12 +-
 drivers/i2c/i2c-uniphier-f.c                  |   2 +-
 drivers/i2c/i2c-uniphier.c                    |   2 +-
 drivers/i2c/imx_lpi2c.c                       |   8 +-
 drivers/i2c/kona_i2c.c                        |  28 +-
 drivers/i2c/mv_i2c.c                          |   4 +-
 drivers/i2c/mvtwsi.c                          |   5 +-
 drivers/i2c/omap24xx_i2c.c                    |   5 +-
 drivers/i2c/omap24xx_i2c.h                    |   4 -
 drivers/i2c/rcar_i2c.c                        |   2 +-
 drivers/i2c/rcar_iic.c                        |   2 +-
 drivers/i2c/s3c24x0_i2c.c                     |   5 +-
 drivers/i2c/sandbox_i2c.c                     |   3 +-
 drivers/i2c/stm32f7_i2c.c                     |  43 +--
 include/i2c.h                                 |  26 ++
 24 files changed, 454 insertions(+), 161 deletions(-)
 create mode 100644 doc/device-tree-bindings/i2c/i2c-designware.txt

-- 
2.25.0.341.g760bfbb309-goog