Hello Simon,
Am 23.01.2020 um 19:48 schrieb 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
Applied the hole series to u-boot-i2c master.
Thanks!
bye,
Heiko
--
DENX Software Engineering GmbH, Managing Director: Wolfgang Denk
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
Phone: +49-8142-66989-52 Fax: +49-8142-66989-80 Email: h...@denx.de
